CN109935938B - Energy storage battery system and its battery thermal management system - Google Patents

Abstract

The embodiment of the invention provides an energy storage battery system and a battery thermal management system thereof, wherein the energy storage battery system comprises: the air conditioner comprises a box body, an air conditioning system and a plurality of rows of energy storage battery cabinets, wherein the air conditioning indoor unit of the air conditioning system is arranged at the preset position of each row of energy storage battery cabinets, and each row of energy storage battery cabinets corresponds to one main air duct; each row of energy storage battery cabinets, the air conditioner indoor unit and each main air duct are arranged in the box body, each row of energy storage battery cabinets comprises a plurality of energy storage battery cabinets, a plurality of battery plug boxes are arranged in each energy storage battery cabinet, and a battery core assembly is arranged in each battery plug box; each energy storage battery cabinet is provided with a communication air channel, and air blown out by each air conditioner indoor unit is conveyed to the communication air channel of the corresponding energy storage battery cabinet through the air inlet and the air outlet of the corresponding main air channel and then is conveyed into the battery plug box through the communication air channel. The system provided by the embodiment can realize uniform air supply, has good heat dissipation effect on the battery core body and improves heat dissipation efficiency.

Description

Energy storage battery system and its battery thermal management system

Technical Field

The embodiments of the present invention relate to the field of battery energy storage technology, and in particular to an energy storage battery system and a battery thermal management system thereof.

Background Art

With the continuous development of economy, human beings are facing the problems of depletion of non-renewable resources, serious environmental pollution, and global warming. The research and development of energy storage technology has been paid more and more attention by energy, transportation, power and other departments in various countries. Compared with various energy storage technologies, battery energy storage system is flexible to install and has a short construction period. It is a technology that is more suitable for engineering applications at this stage. Battery container energy storage system has the characteristics of easy installation, small footprint, and flexible mobility. As a new energy storage device, it has been widely valued by more and more people.

At present, the key technology restricting the development of energy storage systems lies in power batteries, and issues related to battery thermal management are key factors that determine their performance, safety, life and cost. Good thermal management design is a key factor in ensuring the smooth operation of energy storage systems.

However, the existing battery thermal management solution only considers sending air conditioning air directly into the battery box to achieve local heat dissipation of the battery core, which has poor heat dissipation effect. In addition, in order to achieve heat dissipation of all objects in the box, the existing battery thermal management solution takes a long time to process and has low heat dissipation efficiency.

Summary of the invention

The embodiment of the present invention provides an energy storage battery system and a battery thermal management system thereof, so as to solve the problems of poor heat dissipation effect and low heat dissipation efficiency of the existing battery thermal management method.

In a first aspect, an embodiment of the present invention provides an energy storage battery system, including a box body, an air conditioning system, and a plurality of rows of energy storage battery cabinets, wherein the air conditioning system includes an air conditioning indoor unit, and each row of energy storage battery cabinets is provided with an air conditioning indoor unit at a preset position, and each row of energy storage battery cabinets corresponds to a main air duct;

Each row of energy storage battery cabinets, air conditioner indoor units and each main air duct are arranged in the box body, each row of energy storage battery cabinets includes a plurality of energy storage battery cabinets, each energy storage battery cabinet is equipped with a plurality of battery plug boxes, and each battery plug box is equipped with a battery core assembly;

Each main air duct is provided with an air inlet and an air outlet, and each energy storage battery cabinet has a connecting air duct. The air blown out by each air-conditioning indoor unit is transported to the connecting air duct of the corresponding energy storage battery cabinet through the air inlet and air outlet of the corresponding main air duct, and then transported into the battery plug-in box through the connecting air duct.

In a possible design, the connecting air duct of each energy storage battery cabinet includes a top air duct and a side air duct that are connected in sequence;

Each main air duct is provided with an air inlet and an air outlet, each air-conditioning indoor unit is provided with an air blowing outlet, the position of the air blowing outlet of each air-conditioning indoor unit corresponds to the position of the air inlet on the corresponding main air duct, each air outlet on each main air duct is correspondingly provided with an energy storage battery cabinet, each energy storage battery cabinet is provided with an air induced air outlet on the top air duct, each air outlet on the main air duct corresponds to the air induced air outlet on the top air duct of the corresponding energy storage battery cabinet, and each energy storage battery cabinet is provided with a plurality of air outlets on the side air duct, and one air outlet is connected to a battery plug-in box.

In a possible design, the above system further includes a plurality of air volume adjustment devices;

An air volume regulating device is provided at the air inlet and air outlet of each main air duct, an air volume regulating device is provided at the air outlet of each air-conditioning indoor unit, and an air volume regulating device is provided at the air inlet of the top air duct and the air outlet of the side air duct of each energy storage battery cabinet.

In a possible design, an air supply port is provided on the top air duct and/or the side air duct of each energy storage battery cabinet; an air volume regulating device is provided at the air supply port of the top air duct and/or the side air duct of each energy storage battery cabinet.

In a possible design, each battery box is provided with an air inlet, a side air supply port and an air outlet on the outside, and the connecting air duct of each energy storage battery cabinet is connected to the air inlet of a battery box. The air inlet and air outlet of each battery box are arranged opposite to each other; an air volume regulating device is also provided at the air outlet of each battery box.

In a possible design, each battery cell assembly includes a plurality of battery cells, and a gas gap is provided between the battery cells of each battery cell assembly.

In a possible design, each main air duct is fixedly connected to the box body, and each air-conditioning indoor unit and/or each energy storage battery cabinet is provided at the bottom of the box body with a sliding device and a fixing device that cooperate with the bottom of the box body, the sliding device is used to move the air-conditioning indoor unit and/or the energy storage battery cabinet into the box body, and the fixing device is used to fix the air-conditioning indoor unit and/or the energy storage battery cabinet to the box body.

In one possible design, the cross-sectional area of each main air duct end is smaller than the cross-sectional area of the starting end, the starting end is the main air duct position corresponding to the air outlet of the air conditioner indoor unit, and the end is the most downstream position of the air flow in the main air duct.

In a possible design, the above system further includes a plurality of heaters; a heater is provided in each main air duct.

In one possible design, the air outlet of each air-conditioning indoor unit is connected to the air inlet of the corresponding main air duct through a pipe, and/or the air outlet on each main air duct is connected to the air inlet on the top air duct of the corresponding energy storage battery cabinet through a pipe.

In a possible design, passages are formed between the rows of energy storage battery cabinets, an air-conditioning indoor unit is provided in the middle of each row of energy storage battery cabinets, and a main air duct is provided in the upper part of each row of energy storage battery cabinets.

In a second aspect, an embodiment of the present invention provides a battery thermal management system, comprising a data acquisition device and a control device, wherein the data acquisition device is connected to the control device, and the control device is connected to the temperature control system of an air-conditioning indoor unit; the data acquisition device collects the temperature of the battery cell assembly in each battery plug-in box, the temperature at the exhaust port on each main air duct, and one or more of the ambient temperature and ambient humidity of the environment in which the energy storage battery system is located.

The energy storage battery system and its battery thermal management system provided in this embodiment include a box body, multiple air conditioning systems and multiple rows of energy storage battery cabinets. The air conditioning systems include air conditioning indoor units. The air conditioning indoor units are arranged at preset positions of each row of energy storage battery cabinets. Each row of energy storage battery cabinets corresponds to a main air duct. Each row of energy storage battery cabinets, the air conditioning indoor units and each main air duct are arranged in the box body. Each row of energy storage battery cabinets includes multiple energy storage battery cabinets. Multiple battery plug boxes are installed in each energy storage battery cabinet. Battery core components are installed in each battery plug box. Each main air duct is provided with an air inlet and an air outlet. Each energy storage battery cabinet has a connecting air duct. The air blown out by each air conditioning indoor unit is transported to the connecting air duct of the corresponding energy storage battery cabinet through the air inlet and the air outlet of the corresponding main air duct, and then sent to the battery plug box through the connecting air duct to realize uniform air supply, which can quickly and effectively dissipate the heat of all battery core components in the battery plug box, and has a good heat dissipation effect. In addition, all battery core components in the battery plug box can also be concentratedly dissipated at the same time to improve the heat dissipation efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic front view of an energy storage battery system provided by an embodiment of the present invention;

FIG2 is a schematic front view of an energy storage battery cabinet provided in an embodiment of the present invention;

FIG3 is a schematic top view of an air conditioner indoor unit and an energy storage battery cabinet provided by an embodiment of the present invention;

FIG4 is a schematic diagram of the structure of a battery plug box provided in an embodiment of the present invention;

FIG5 is a schematic diagram of the structure of a battery thermal management system provided by an embodiment of the present invention.

Description of reference numerals:

101-Box,

102-Air conditioner indoor unit,

1021-Air outlet of the indoor unit of the air conditioner,

103-Energy storage battery cabinet,

104- Main air duct,

1041- The air inlet of the main air duct,

1042-Exhaust vent of the main air duct,

105-Battery box,

1051-Battery box air inlet,

1052- side air inlet of battery box,

1053-Battery box air outlet,

106-battery cell assembly,

107-Top air duct,

1071-The air outlet of the top air duct,

1072-induction fan,

108-Side air duct,

1081-The air outlet of the side air duct,

109-Air volume adjustment device,

110-Supplementary air vent.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As mentioned in the background technology, the key technology that restricts the development of energy storage systems lies in power batteries, and battery thermal management-related issues are key factors that determine their performance, safety, life, and cost of use. Good thermal management design is a key factor in ensuring the smooth operation of energy storage systems. However, existing battery thermal management solutions only consider sending air conditioning air directly into the battery plug-in box to achieve local heat dissipation of the battery core, which has poor heat dissipation effect. In addition, in order to achieve heat dissipation of all objects in the box, the existing battery thermal management solution takes a long time to process and has low heat dissipation efficiency.

Based on the above reasons, an embodiment of the present invention provides an energy storage battery system, including a box body, multiple air conditioning systems and multiple rows of energy storage battery cabinets, the air conditioning systems all include air conditioning indoor units, each row of energy storage battery cabinets is provided with air conditioning indoor units at preset positions, each row of energy storage battery cabinets corresponds to a main air duct, each row of energy storage battery cabinets, air conditioning indoor units and each main air duct are arranged in the box body, each row of energy storage battery cabinets includes multiple energy storage battery cabinets, each energy storage battery cabinet is equipped with multiple battery plug-ins, each battery plug-in box is equipped with battery core components, each main air duct is provided with an air inlet and an air outlet, each energy storage battery cabinet has a connecting air duct, the air blown out by each air conditioning indoor unit is transported to the connecting air duct of the corresponding energy storage battery cabinet through the air inlet and the air outlet of the corresponding main air duct, and then sent into the battery plug-in box through the connecting air duct, so as to realize uniform air supply, and can quickly and effectively dissipate the heat of all battery core components in the battery plug-in box, with good heat dissipation effect, and can also centrally dissipate the heat of all battery core components in the battery plug-in box at the same time, so as to improve the heat dissipation efficiency.

FIG. 1 is a schematic front view of an energy storage battery system provided in an embodiment of the present invention, and FIG. 2 is a schematic front view of an energy storage battery cabinet provided in an embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the system may include:

The box body 101, the air-conditioning system and several rows of energy storage battery cabinets 103, the air-conditioning system includes an air-conditioning indoor unit 102, each row of energy storage battery cabinets 103 is provided with an air-conditioning indoor unit 102 at a preset position, and each row of energy storage battery cabinets 103 corresponds to a main air duct 104.

Here, the shape and size of the box 101 can be set according to actual needs, and the number of columns of the energy storage battery cabinet 103 can also be set according to actual needs, which can be one column or multiple columns, as shown in Figure 3, Figure 3 is a top view schematic diagram of the air-conditioning indoor unit 102 and the energy storage battery cabinet 103 provided in an embodiment of the present invention, and the number of columns of the energy storage battery cabinet 103 is two columns. Each column of the energy storage battery cabinet 103 may include one or more energy storage battery cabinets 103, and the specific number can also be set according to actual needs. The shape and size of the energy storage battery cabinet 103 can also be set according to actual needs. Each energy storage battery cabinet 103 can be installed with one or more battery plug boxes 105. As shown in Figure 4, Figure 4 is a structural schematic diagram of the battery plug box 105 provided in an embodiment of the present invention, and a battery core assembly 106 is installed in each battery plug box 105.

The air conditioning system can be composed of an air conditioning indoor unit 102 and an outdoor unit for cooling or heating. An air conditioning indoor unit 102 is provided at a preset position of each row of energy storage battery cabinets 103, wherein the preset position can be set according to actual needs, and can be one or more positions. As shown in FIG3 , the preset position is one position, which is the middle position of each row of energy storage battery cabinets 103.

Each row of energy storage battery cabinets 103 corresponds to a main air duct 104, and the specific position of the main air duct 104 can be set according to actual needs. For example, a main air duct 104 is set on the upper part of each row of energy storage battery cabinets 103. The main air duct 104 is used to transport the air blown out by the air conditioner indoor unit 102 to the corresponding energy storage battery cabinet 103.

Each row of energy storage battery cabinets 103 , the air conditioner indoor unit 102 and each main air duct 104 are arranged in the box body 101 , and each row of energy storage battery cabinets 103 includes a plurality of energy storage battery cabinets 103 , each energy storage battery cabinet 103 is installed with a plurality of battery plug-in boxes 105 , and each battery plug-in box 105 is installed with a battery core assembly 106 .

Here, how the rows of energy storage battery cabinets 103, the air-conditioning indoor units 102 and the main air ducts 104 are specifically arranged in the box body 101 can be set according to actual needs. For example, the rows of energy storage battery cabinets 103 are arranged in parallel in the box body 101, and passages are formed between the rows of energy storage battery cabinets 103. Each row of energy storage battery cabinets 103 includes a plurality of energy storage battery cabinets 103. The air-conditioning indoor unit 102 is arranged in the middle of each row of energy storage battery cabinets 103, and each main air duct 104 is arranged at the top of the box body 101.

Each energy storage battery cabinet 103 may be installed with one or more battery plug boxes 105, and each battery plug box 105 may be installed with a battery core assembly 106, wherein the battery core assembly 106 may include one or more battery cores, and the specific number of battery cores may be set according to actual conditions.

Each main air duct 104 is provided with an air inlet 1041 and an air outlet 1042, and each energy storage battery cabinet 103 has a connecting air duct. The air blown out by each air-conditioning indoor unit 102 is transported to the connecting air duct of the corresponding energy storage battery cabinet 103 through the air inlet 1041 and the air outlet 1042 of the corresponding main air duct 104, and then transported into the battery plug box 105 through the connecting air duct.

Here, each main air duct 104 may be provided with an air inlet 1041 and an air outlet 1042, wherein the number and quantity of the air inlets 1041 may be set according to actual conditions, and similarly, the number and quantity of the air outlets 1042 may also be set according to actual conditions. The air blown out by the air conditioner indoor unit 102 may enter through the air inlet 1041 of the main air duct 104, and then be transported to the energy storage battery cabinet 103 through the air outlet 1042 of the main air duct 104.

The connecting passages provided on the energy storage battery cabinet 103 may include a top air duct 107 and a side air duct 108. The air exhausted from the exhaust port 1042 of the main air duct 104 can enter the energy storage battery cabinet 103 through the top air duct 107. The air in the main air duct 104 can be evenly flowed by utilizing the flow equalization effect of the top air duct 107, and then sent into the battery plug-in box 105 through the side air duct 108 to achieve uniform air supply.

The energy storage battery system provided in this embodiment includes a box body, multiple air conditioning systems and several rows of energy storage battery cabinets. The air conditioning systems all include air conditioning indoor units. The air conditioning indoor units are arranged at preset positions of each row of energy storage battery cabinets. Each row of energy storage battery cabinets corresponds to a main air duct. Each row of energy storage battery cabinets, the air conditioning indoor units and each main air duct are arranged in the box body. Each row of energy storage battery cabinets includes several energy storage battery cabinets. Several battery plug boxes are installed in each energy storage battery cabinet. Battery core components are installed in each battery plug box. Each main air duct is provided with an air inlet and an air outlet. Each energy storage battery cabinet has a connecting air duct. The air blown out by each air conditioning indoor unit is transported to the connecting air duct of the corresponding energy storage battery cabinet through the air inlet and the air outlet of the corresponding main air duct, and then transported into the battery plug box through the connecting air duct, so as to realize uniform air supply, and can quickly and effectively dissipate the heat of all battery core components in the battery plug box, with good heat dissipation effect. Moreover, all battery core components in the battery plug box can also be concentratedly dissipated at the same time, so as to improve the heat dissipation efficiency.

Optionally, as shown in FIGS. 1 and 2 , the ventilation ducts of each energy storage battery cabinet 103 include a top duct 107 and a side duct 108 that are connected in sequence; each main duct 104 is provided with an air inlet 1041 and an air outlet 1042, and each air conditioner indoor unit 102 is provided with an air outlet 1021, and the position of the air outlet 1021 of each air conditioner indoor unit 102 corresponds to the position of the air inlet 1041 on the corresponding main duct 104, and each air conditioner indoor unit 102 is provided with an air outlet 1021. An energy storage battery cabinet 103 is correspondingly arranged at each exhaust port 1042, and an air inlet 1071 is provided on the top air duct 107 of each energy storage battery cabinet 103. The exhaust port 1042 on each main air duct 104 corresponds to the air inlet 1071 on the top air duct 107 of the corresponding energy storage battery cabinet 103. The side air duct 108 of each energy storage battery cabinet 103 is provided with a plurality of air outlets 1081, and one air outlet 1081 is connected to a battery plug box 105.

Here, the main air duct 104 is provided with an air inlet 1041, and the air inlet 1041 corresponds to the position of the air outlet 1021 of the air conditioner indoor unit 102. The main air duct 104 is also provided with an exhaust port 1042, and the upper part of the top air duct 107 is provided with an air inlet 1071, and the exhaust port 1042 corresponds to the air inlet 1071, and the lower part of the exhaust port 1042 is arranged correspondingly to the energy storage battery cabinet 103, and the side air duct 108 is provided with an air outlet 1081, and one air outlet 1081 is connected to one battery plug box 105.

Among them, there is a certain distance between the air outlet 1021 of the air-conditioning indoor unit 102 and the corresponding air inlet 1041 on the main air duct 104. Similarly, there is a certain distance between the air inlet 1071 of the top air duct 107 of the energy storage battery cabinet 103 and the air outlet 1042 of the main air duct 104 above it. The air outlets can be connected by utilizing the flow of air. There is no air duct connection structure, which facilitates the movement of the air-conditioning indoor unit and the energy storage battery cabinet, and facilitates the maintenance and replacement of the equipment.

Of course, in some applications, the air outlet 1021 of the air-conditioning indoor unit 102 can be connected to the air inlet 1041 of the main air duct 104 by a pipe (such as a bellows), or the air outlet 1042 of the main air duct 104 can be connected to the air inlet 1071 of the energy storage battery cabinet 103 by a pipe (such as a bellows) as needed, so as to avoid air leakage and maximize the utilization efficiency of air conditioning air.

Optionally, an exhaust fan may be provided at the exhaust port 1042 of the main air duct 104, and an induced draft fan 1072 may also be provided at the induced draft fan 1071 of the top air duct 107 (as shown in FIG. 2 ). By providing a fan, the insufficiency of wind pressure provided by the air conditioner indoor unit alone can be compensated, and the wind in the main air duct 104 can be kept at a certain pressure when being sent to the energy storage battery cabinet 103 at the far end of the air conditioner indoor unit 102, which is beneficial to the temperature balance of the energy storage battery system, and by adjusting the speed of the exhaust fan or induced draft fan at different positions, a reasonable ratio of wind volume can be maintained to promote the temperature balance of the energy storage battery system.

Optionally, as shown in FIG. 1 and FIG. 2 , the above system further includes a plurality of air volume regulating devices 109 .

An air volume regulating device 109 is provided at the air inlet 1041 and the air outlet 1042 of each main air duct 104, an air volume regulating device 109 is provided at the air outlet 1021 of each air-conditioning indoor unit 102, and an air volume regulating device 109 is provided at the air inlet 1071 of the top air duct 107 and the air outlet 1081 of the side air duct 108 of each energy storage battery cabinet 103.

Among them, the above-mentioned air volume regulating device 109 can be an air volume regulating valve, an air volume regulating plate, an exhaust fan, etc. The number of the above-mentioned air volume regulating device 109 can be determined according to actual needs, and can be one or more. For the entire energy storage battery system, temperature control is crucial, and air volume control is an important means of controlling temperature. Therefore, the above-mentioned system also includes an air volume regulating device 109, and the air volume regulating device includes one or more of the following: an air volume regulating device 109 at the air outlet 1021 of the air-conditioning indoor unit 102, an air volume regulating device 109 at the air inlet 1041 and the air outlet 1042 of the main air duct 104, an air volume regulating device 109 at the exhaust port 1071 of the top air duct 107 and the air outlet 1081 of the side air duct 108, etc.

Optionally, as shown in FIG. 2 , an air supply port 110 is provided on the top air duct 107 and/or the side air duct 108 of each energy storage battery cabinet 103 .

Here, in addition to directly sending the air-conditioning air into the battery box 105 through the air outlet 1081 of the side air duct 108, an air supply port 110 is also provided on the top air duct 107 and/or the side air duct 108. FIG. 2 shows a schematic diagram of providing the air supply port 110 on the lower part of the top air duct 107 and the side air duct 108. By providing the air supply port 110, the air output from the main air duct 104 is guided to the vicinity of the battery box 105. Thus, the temperature of the ambient air around the battery box 105 is also adjusted. Combined with the air flow inside the battery box 105, the temperature of the battery cells in the battery box 105 can be quickly adjusted, and it is beneficial to temperature balance.

Optionally, an air inlet 1051, a side air supply port 1052 and an air outlet 1053 are provided on the outside of each battery box 105, that is, the air inlet 1051 of the battery box 105, the side air supply port 1052 of the battery box 105 and the air outlet 1053 of the battery box 105, and the connecting air duct of each energy storage battery cabinet 103 is connected to the air inlet 1051 of a battery box 105, and the air inlet 1051 and the air outlet 1053 of each battery box 105 are arranged relatively to each other.

As shown in FIG4 , the battery box 105 may be provided with an air inlet 1051 on the left side, which is connected to the air outlet 1081 on the side air duct 108 of the energy storage battery cabinet 103, so as to introduce air-conditioning wind into the battery box 105. An air outlet 1053 is provided on the opposite side of the air inlet 1051, and an exhaust fan may also be provided at the air outlet 1053. After the air-conditioning wind enters through the air inlet 1051, it passes through the battery core assembly 106 and is discharged from the air outlet 1053. In the figure, two groups of battery core assemblies 106 are given as an example, and of course, one or more groups may also be provided. Generally, the battery core assembly 106 is composed of a plurality of battery core bodies, which are fixedly connected together by binding straps. In order to enhance the heat exchange effect of the air and cooperate with the internal gas flow, in this embodiment, spacers are provided between the battery core bodies, so as to form a gas flow passage between the battery core bodies, thereby accelerating the heat dissipation effect.

In addition, a side air supply port 1052 may be provided on the battery box 105, and ambient air enters the battery box 105 through the side air supply port 1052, and together with the air entering the battery box 105 through the air outlet 1081 of the side air duct 108, performs heat exchange on the battery core assembly 106 in the battery box 105, and flows out through the air outlet 1053 outside the battery box 105. In FIG. 4 , side air supply ports 1052 are schematically shown at the upper and lower parts of the battery box 105 . Of course, it is also possible to set the side air supply ports 1052 on the side walls of the battery box 105 perpendicular to the paper direction, which depends on the position of the air supply ports 110 on the side air duct 108 . If the air supply ports 110 are located above or below the air outlet 1081 of the side air duct, the side air supply ports 1052 are set at the upper and lower positions on the battery box 105 ; if the air supply ports 110 are located in front and rear positions of the air outlet 1081 of the side air duct 108 , the side air supply ports 1052 are set at the front and rear positions on the battery box 105 . The up, down, left, right, front and back positions are shown in FIG. 2 .

Optionally, each battery cell assembly 106 includes a plurality of battery cells, and a gas gap is provided between each battery cell assembly 106 .

The number of battery cells included in each battery cell assembly 106 can be set according to actual conditions.

Optionally, each main air duct 104 is respectively fixedly connected to the box body 101, and each air-conditioning indoor unit 102 and/or each energy storage battery cabinet 103 is provided with a sliding device and a fixing device that cooperate with the bottom of the box body 101 at the bottom, the sliding device is used to move the air-conditioning indoor unit 102 and/or the energy storage battery cabinet 103 into the box body 101, and the fixing device is used to fix the air-conditioning indoor unit 102 and/or the energy storage battery cabinet 103 to the box body 101.

Here, for the installation of the main components of the energy storage battery system, the main air duct 104 can be fixedly connected to the box 101, and the bottom of the air conditioner indoor unit 102 and/or the energy storage battery cabinet 103 can be provided with a sliding device and a fixing device that cooperate with the bottom of the box 101, and the air conditioner indoor unit 102 and/or the energy storage battery cabinet 103 are moved into the box 101 by the sliding device, and are fixedly connected to the box 101 by the fixing device. The above-mentioned sliding device can adopt structures such as slide rails, slide grooves, pulleys, etc., and which structure is specifically selected can be set according to actual conditions.

Optionally, the cross-sectional area of the end of each main air duct 104 is smaller than the cross-sectional area of the starting end, the starting end is the position of the main air duct 104 corresponding to the air outlet 1021 of the air-conditioning indoor unit 102, and the end is the most downstream position of the air flow in the main air duct 104.

Specifically, in order to enable the energy storage battery cabinet 103 far away from the air-conditioning indoor unit 102 to obtain a suitable air volume and increase the pressure of the gas flow, the cross-sectional area of the end of the main air duct 104 can be made smaller than the cross-sectional area of the starting end. The above-mentioned starting end refers to the position corresponding to the air outlet 1021 of the air-conditioning indoor unit 102, and the above-mentioned end is the most downstream position according to the flow direction of the air in the main air duct 104.

Optionally, the above system further includes a plurality of heaters; a heater is provided in each main air duct.

In this embodiment, considering that when the outdoor temperature is low, such as in winter, the temperature inside the energy storage battery system needs to be maintained within a reasonable range, higher than the outdoor temperature. At this time, an electric heater can be provided in the main air duct 104 to supplement the temperature of the air blown out by the air conditioner.

Optionally, the air outlet 1021 of each air-conditioning indoor unit 102 is connected to the air inlet 1041 of the corresponding main air duct 104 through a pipe, and/or the air outlet 1042 on each main air duct 104 is connected to the air inlet 1071 on the top air duct 107 of the corresponding energy storage battery cabinet 103 through a pipe.

Here, the air outlet 1021 of the air-conditioning indoor unit 102 is connected to the air inlet 1041 of the main air duct 104 by a pipe, and the air outlet 1042 of the main air duct 104 is connected to the air inlet 1071 of the energy storage battery cabinet 103 by a pipe, which can avoid air leakage, maximize the utilization efficiency of air conditioning air, and meet practical application needs.

Optionally, passages are formed between the rows of energy storage battery cabinets, an air-conditioning indoor unit is provided in the middle of each row of energy storage battery cabinets, and a main air duct is provided in the upper part of each row of energy storage battery cabinets.

As shown in FIG3 , the energy storage battery cabinets 103 are arranged in two rows, and a passage is formed between the two rows of battery cabinets. An air-conditioning indoor unit 102 is arranged in the middle of each row of energy storage battery cabinets 103, and a main air duct 104 is arranged in the upper part. The air blown out from the air outlet 1021 of the air-conditioning indoor unit 102 is supplied to the top of the energy storage battery cabinets 103 in the row from both sides of the air inlet 1041 in the main air duct 104.

Optionally, an air volume regulating device 109 is provided at the air supply port 110 on the top air duct 107 and/or the side air duct 108 of each energy storage battery cabinet 103 .

Optionally, an air volume regulating device 109 is provided at the air outlet 1053 of each battery box 105 .

Here, the air volume regulating device 109 may be an air volume regulating valve, an air volume regulating plate, an induced draft fan, etc. The specific type of the air volume regulating device 109 may be determined according to actual needs.

Among them, the air volume regulating device includes one or more of the following: an air volume regulating device 109 at the air supply port 110 on the top air duct 107 and/or the side air duct 108 of the energy storage battery cabinet 103, an air volume regulating device 109 at the air outlet 1053 of the battery plug box 105, etc. The air volume is controlled by the air volume adjusting device to achieve the purpose of controlling the temperature.

Fig. 5 is a schematic diagram of the structure of a battery thermal management system provided by an embodiment of the present invention. As shown in Fig. 5, the battery thermal management system 50 may include: a data acquisition device 501 and a control device 502, wherein the data acquisition device 501 is connected to the control device 502, and the control device 502 is connected to the temperature control system of the air conditioner indoor unit 102; the data acquisition device 501 collects the temperature of the battery core assembly 106 in each battery plug box 105, the temperature at the exhaust port 1042 on each main air duct 104, and one or more of the ambient temperature and ambient humidity of the environment where the energy storage battery system is located.

Here, the control device 502 controls the temperature control system inside the air conditioner according to the data collected by the data collection device 501, thereby adjusting the temperature of the battery cells in the box and/or the ambient temperature, wherein the temperature control system inside the air conditioner includes a compressor frequency or speed control system.

In addition, the data acquisition device 501 can also collect: the temperature of the air outlet 1053 of the battery plug box 105 .

The control device 502 can control the air volume regulating device 109, the electric heater provided in the main air duct 104, etc. according to the data collected by the data collection device 501, so as to further adjust the temperature of the battery cells in the box and/or the temperature of the environment.

In the battery thermal management system provided in this embodiment, the data acquisition device collects the temperature of the battery cell assembly in the battery box, the temperature at the exhaust port on each main air duct, the temperature of the battery box outlet, and one or more of the ambient temperature and ambient humidity of the environment in which the energy storage battery system is located. The control device controls the temperature control system inside the air conditioner, the air volume adjustment device, the electric heater arranged in the main air duct, etc. according to the data collected by the data acquisition device, so as to adjust the temperature of the battery cells in the box and/or the ambient temperature, realize the thermal management of the energy storage battery system, and meet the existing battery thermal management requirements.

The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An energy storage battery system, characterized in that it comprises a box body, an air conditioning system and a plurality of rows of energy storage battery cabinets, wherein the air conditioning system comprises an air conditioning indoor unit, the middle of each row of energy storage battery cabinets is provided with an air conditioning indoor unit, and the upper part of each row of energy storage battery cabinets is provided with a main air duct; Each row of energy storage battery cabinets, air conditioner indoor units and each main air duct are arranged in the box body, each row of energy storage battery cabinets includes a plurality of energy storage battery cabinets, each energy storage battery cabinet is equipped with a plurality of battery plug boxes, and each battery plug box is equipped with a battery core assembly; Each main air duct is provided with an air inlet and an air outlet, and each energy storage battery cabinet has a connecting air duct. The air blown out by each air conditioner indoor unit is transported to the connecting air duct of the corresponding energy storage battery cabinet through the air inlet and air outlet of the corresponding main air duct, and then transported into the battery plug box through the connecting air duct. The connecting air duct of each energy storage battery cabinet includes a top air duct and a side air duct which are connected in sequence; Each air conditioner indoor unit is provided with an air outlet, and the position of the air outlet of each air conditioner indoor unit corresponds to the position of the air inlet on the corresponding main air duct. Each exhaust outlet on each main air duct is correspondingly provided with an energy storage battery cabinet. The top air duct of each energy storage battery cabinet is provided with an air inlet, and the exhaust outlet on each main air duct corresponds to the air inlet on the top air duct of the corresponding energy storage battery cabinet. The side air duct of each energy storage battery cabinet is provided with a plurality of air outlets, and one air outlet is connected to a battery plug box; Also includes a number of air volume adjustment devices; An air volume regulating device is provided at the air inlet and air outlet of each main air duct, an air volume regulating device is provided at the air outlet of each air-conditioning indoor unit, and an air volume regulating device is provided at the air inlet of the top air duct and the air outlet of the side air duct of each energy storage battery cabinet. 2. The system according to claim 1 is characterized in that an air supply port is provided on the top air duct and/or the side air duct of each energy storage battery cabinet; and an air volume regulating device is provided at the air supply port of the top air duct and/or the side air duct of each energy storage battery cabinet. 3. The system according to claim 1 is characterized in that an air inlet, a side air supply port and an air outlet are provided on the outside of each battery box, the connecting air duct of each energy storage battery cabinet is connected to the air inlet of a battery box, and the air inlet and air outlet of each battery box are arranged opposite to each other; an air volume regulating device is also provided at the air outlet of each battery box. 4. The system according to claim 1 is characterized in that each battery cell assembly includes a plurality of battery cells, and a gas gap is provided between the battery cells of each battery cell assembly. 5. The system according to claim 1 is characterized in that each main air duct is fixedly connected to the box body, and each air-conditioning indoor unit and/or each energy storage battery cabinet is provided with a sliding device and a fixing device that cooperate with the bottom of the box body at the bottom, the sliding device is used to move the air-conditioning indoor unit and/or the energy storage battery cabinet into the box body, and the fixing device is used to fix the air-conditioning indoor unit and/or the energy storage battery cabinet to the box body. 6. The system according to claim 1 is characterized in that the cross-sectional area of each main air duct end is smaller than the cross-sectional area of the starting end, the starting end is the main air duct position corresponding to the air outlet of the air conditioner indoor unit, and the end is the most downstream position of the air flow in the main air duct. 7. The system according to claim 1 is characterized in that it also includes a plurality of heaters; a heater is provided in each main air duct. 8. The system according to claim 1 is characterized in that the air outlet of each air-conditioning indoor unit is connected to the air inlet of the corresponding main air duct through a pipe, and/or the air outlet on each main air duct is connected to the air inlet on the top air duct of the corresponding energy storage battery cabinet through a pipe. 9. The system according to claim 1 is characterized in that channels are formed between each row of energy storage battery cabinets. 10. A battery thermal management system based on the energy storage battery system according to any one of claims 1 to 9, characterized in that it includes a data acquisition device and a control device, the data acquisition device is connected to the control device, and the control device is connected to the temperature control system of the air-conditioning indoor unit; the data acquisition device collects the temperature of the battery core assembly in each battery plug box, the temperature at the exhaust port on each main air duct, and one or more of the ambient temperature and ambient humidity of the environment in which the energy storage battery system is located.