CN110048620A - One kind being based on modular power assembly sub-module assemblies - Google Patents

Abstract

The invention discloses a modularized powertrain sub-module assembly, comprising a radiator, a power device, an AC board, a DC board and a control board; two sides of the radiator are respectively installed with power devices, and the Both sides of the power device are sequentially connected with an AC board and a DC board, the control board is installed on the outside of one of the DC boards, and the power device, the AC board, the DC board and the control board pass through. The structural parts are fixed on both sides of the radiator; the AC board leads out an AC first port and an AC second port, and the DC board leads out a positive port, a negative port, a first fault signal port and a first drive signal. Port; sub-module modular structure design, more flexible installation in the car, greatly reduces the production and maintenance costs of the electric vehicle power system, and can effectively improve the utilization of the interior space and endurance.

Description

A modular-based powertrain sub-module assembly

technical field

The invention relates to a modularized powertrain sub-module assembly, belonging to the technical field of new energy.

Background technique

In recent years, with the vigorous development of the new energy electric vehicle industry, in-vehicle electronic equipment has shown a trend of miniaturization, integration and high power density. However, most of the BMS, motor drive unit, DC/DC unit, PDU unit and OBC charging unit in the powertrain system industry of pure electric vehicles are designed independently, and are installed in the vehicle through structural combination, resulting in powertrain The system has low energy density, complex control, difficult installation and maintenance, low system reliability and high cost, which is not suitable for the development trend of modularization, integration, integration, platformization, light weight, and intelligence of the whole vehicle.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a modular-based powertrain sub-module assembly to solve the above-mentioned defects or one of the defects caused in the prior art.

A modularized powertrain sub-module assembly, comprising a radiator, a power device, an AC board, a DC board and a control board;

The two sides of the radiator are respectively installed with power devices, the two sides of the power device are connected with an AC board and a DC board in sequence, and the control board is installed on the outside of one of the DC boards, and the The power device, AC board, DC board and control board are fixed on both sides of the radiator through structural parts;

The power device includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and the first switch tube, the second switch tube, the third switch tube and the fourth switch tube are all provided with S pole pin, D pole pin and G pole pin;

The AC board leads out an AC first port and an AC second port, and the DC board leads out a positive port, a negative port, a first fault signal port and a first driving signal port;

The control board externally leads out a second fault signal port, a second driving signal port, a first battery signal port, a second battery signal port, a first download port and a second download port.

Preferably, the S pole pin of the first switch tube and the D pole pin of the third switch tube are connected to the AC first port through electrical connectors, and the S pole pin of the second switch tube and the fourth switch The D pole pin of the tube is connected to the second AC port through an electrical connector.

Preferably, the D pole pins of the first switch tube and the second switch tube are connected through pin holes on the DC board and are connected to the positive terminal, and the S pole pins of the third switch tube and the fourth switch tube The pins are connected through the pin through holes on the DC board, and are connected to the negative terminal.

Preferably, all the G pole pins of the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube are connected to the first drive signal port of the DC card through pin holes on the DC card , the first drive signal port is connected with the second drive signal port corresponding to the control board through an electrical connector.

Preferably, the AC first port is externally connected to the AC second port of the adjacent sub-module, each bridge arm is composed of a plurality of sub-modules connected in series, the AC first port of the first sub-module in the bridge arm and the last sub-module The AC second port is used as the external input or output port of the system.

Preferably, the positive terminal is externally connected to the positive terminal of the battery module, and the negative terminal is externally connected to the negative terminal of the battery module.

Preferably, the control board controls the work of the two sub-modules, the first battery signal port is externally connected to a signal port of a battery module, and the second battery signal port is externally connected to a signal port of another battery module .

Preferably, the system power of the power device is increased by increasing the number of switch tubes connected in parallel, and each of the switch tubes of the power device is provided with three groups.

Preferably, a thermally conductive material is provided between the power device and the heat sink.

Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the sub-module adopts a modular structure design, the powertrain system is composed of a variable number of sub-modules, and the sub-module integrates a power device, a radiator and a control system, By changing the number of series sub-modules in the bridge arm or by changing the number of parallel batteries in the sub-modules to adjust the power level and capacity of the system, it can be applied to new energy electric vehicles of different power levels. The sub-module modular structure design makes the installation method more flexible in the car, which greatly reduces the production and maintenance costs of the electric vehicle power system, and can effectively improve the utilization rate and endurance of the interior space.

Description of drawings

1 is a schematic structural diagram of a sub-module assembly of the present invention;

2 is a schematic structural diagram of a power device of the present invention;

3 is a schematic structural diagram of an AC board of the present invention;

FIG. 4 is a schematic structural diagram of a DC board card of the present invention;

FIG. 5 is a schematic structural diagram of a control board of the present invention.

In the figure: 1, radiator; 2, power device; 21, first switch tube; 22, second switch tube; 23, third switch tube; 24, fourth switch tube; 3, thermal conductive material; 4, AC board card; 41, AC first port; 42, AC second port; 5, DC board; 51, positive port; 52, negative port; 53, first fault signal port; 54, first drive signal port; 6, 7. Control board; 71. Second fault signal port; 72. Second driving signal port; 73. First battery signal port; 74. Second battery signal port; 75. First download port; 76, The second download port; 8. The installation hole; 9. The power switch tube is opened; 10. The pin is perforated.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

As shown in Figures 1-5, a modularized powertrain sub-module assembly is disclosed, including a radiator 1, a power device 2, an AC board 4, a DC board 5 and a control board 7;

A power device 2 is installed on both sides of the radiator 1 respectively. The two sides of the power device 2 are connected with an AC board 4 and a DC board 5 in turn. The control board 7 is installed on the outside of one of the DC boards 5. The power device 2 , the AC board 4, the DC board 5 and the control board 7 are fixed on both sides of the radiator 1 through the structural member 6;

The power device 2 includes a first switch 21, a second switch 22, a third switch 23 and a fourth switch 24, a first switch 21, a second switch 22, a third switch 23 and a fourth switch 24 are equipped with S pole pins, D pole pins and G pole pins;

The AC board 4 leads out the AC first port 41 and the AC second port 42, wherein the AC first port 41 is connected with the AC second port of the adjacent sub-module, and each bridge arm is composed of a plurality of sub-modules connected in series. The AC first port of the first sub-module and the AC second port of the last sub-module are connected to the external motor, charging port, and vehicle DC/DC. The fault signal port 53 and the first drive signal port 54, wherein the positive terminal 51 and the negative terminal 52 are connected to the positive terminal and negative terminal of the external battery module to provide energy for the sub-module, and the control board 7 leads to the external second fault signal port 71. The second drive signal port 72, the first battery signal port 73, the second battery signal port 74, the first download port 75 and the second download port 76, wherein the second fault signal port 71, the second drive signal port 72 Connect to the first fault signal port 53 and the first drive signal port 54 of the DC board 5 to control the power device 2 on and off, the first battery signal port 73 and the second battery signal port 74 and the signals of the two battery modules The ports are connected to control active balancing and fault isolation of the battery module, and the first download port 75 and the second download port 76 are used for downloading the sub-module control program.

Specifically, as shown in FIG. 2 and FIG. 3 , the S pole pin of the first switch tube 21 and the D pole pin of the third switch tube 23 are connected to the AC first port 41 through electrical connectors, and the second switch tube 22 The S pole pin and the D pole pin of the fourth switch tube 24 are connected to the AC second port 42 through electrical connectors. The four switch tubes are connected in series to form an H-bridge structure, and the AC port is drawn to the outside to realize bidirectional inversion of AC and DC energy. Function.

Specifically, as shown in FIG. 2 and FIG. 4 , the D pole pins of the first switch tube 21 and the second switch tube 22 are connected through the pin hole 10 on the DC board 5, and are connected to the positive terminal 51, and the third switch The S pole pins of the tube 23 and the fourth switch tube 24 are connected through the pin hole 10 on the DC board 5, and are connected to the negative terminal 52; Independent control of battery modules.

Specifically, as shown in FIG. 2 and FIG. 4 , all the G pole pins of the first switch tube 21 , the second switch tube 22 , the third switch tube 23 and the fourth switch tube 24 pass through the pin holes on the DC board 5 10 is connected to the first driving signal port 54 of the DC board 5, the first driving signal port 54 is connected to the second driving signal port 72 corresponding to the control board 7 through the electrical connector, and the control board controls the switching device through the driving signal port on and off.

Specifically, as shown in FIG. 2 and FIG. 4 , all D and S pole pins of the first switch tube 21 , the second switch tube 22 , the third switch tube 23 and the fourth switch tube 24 pass through the tubes on the DC board 5 The pin through hole 10 is connected to the first fault signal port 53 of the DC board 5 , and the first fault signal port 53 is connected to the second fault signal port 71 corresponding to the control board 7 through an electrical connector. The control board judges the quality of the power device through the fault signal port, and realizes the function of rapid fault removal.

Specifically, as shown in FIG. 4 , the AC first port 41 is externally connected to the AC second port of the adjacent sub-module, and each bridge arm is composed of a plurality of sub-modules connected in series. The AC first port of the first sub-module in the bridge arm is connected to the The AC second port of the last sub-module is used as the external input or output port of the system. The AC ports of multiple sub-modules are connected in series through the MMC topology. The midpoint of the upper and lower bridge arms is used as the AC output port of the converter to connect the motor and the AC charging port to realize the motor drive, AC fast charging, AC V2V, and AC V2G in the vehicle. The first and last sub-modules of each phase are used as the DC output port of the converter to connect the DC charging port and the vehicle DC/DC to realize the power control of the AC and DC side and the power supply of auxiliary equipment in the vehicle, DC fast charging, DC V2V , DC V2G function.

Specifically, as shown in FIG. 4 , the positive terminal 51 is externally connected to the positive terminal of the battery module, and the negative terminal 52 is externally connected to the negative terminal of the battery module to provide energy for the sub-modules.

Specifically, as shown in FIG. 5 , the control board 7 controls the work of the two sub-modules, the first battery signal port 73 is externally connected to the signal port of the battery module, and the second battery signal port 74 is externally connected to the signal of another battery module on the port. The two sub-modules share a control board, which saves space in the car and reduces costs. The control board controls the active balance and fault isolation of the battery module, prolongs the service life of the battery module, and reduces the cost of the battery module.

Specifically, as shown in Figure 2, the system power of the power device 2 is increased by increasing the number of parallel switches. The power device 2 has three groups of switches, and the sub-module improves the battery life by increasing the number of switches.

Specifically, as shown in FIG. 1 , a thermally conductive material 3 is provided between the power device 2 and the AC board 4 to increase the thermal conductivity of the power device 2 .

Working principle: The sub-module adopts the H-bridge structure of multiple power devices 2 in parallel. By controlling the conduction sequence and current direction of the power devices 2, the positive and negative voltage output of the sub-module battery is formed, and the battery is charged or the battery module is removed.

When the first switch tube 21 and the fourth switch tube 24 are turned on and the current direction is flowing into the sub-module, the sub-module outputs a positive level and the battery is in a charged state; when the second switch tube 22 and the third switch tube 23 are turned on And when the current direction is flowing into the sub-module, the sub-module outputs a negative level, and the battery is in a charged state;

When the first switch tube 21 and the fourth switch tube 24 are turned on and the current direction is to flow out of the sub-module, the sub-module outputs a positive level, and the battery is in a discharge state;

When the second switch tube 22 and the third switch tube 23 are turned on and the current flows out of the sub-module, the sub-module outputs a negative level, and the battery is in a discharge state.

The powertrain system consists of multiple identical sub-modules installed in one housing, which cooperates with vehicle ultra-fast AC and DC charging control technology, V2G and V2V bidirectional charging technology, battery active balance control technology, battery fault detection and online isolation control technology and multi-level high-efficiency motor control technology, convert the energy of the battery module into the energy required by the motor and auxiliary power supply, control the rotation of the motor, the operation of auxiliary equipment, and the active balance of the battery module. The energy is converted into the energy required by the battery module, and the charging power of the battery module is controlled; a modularized powertrain sub-module assembly proposed by the present invention combines the power device 2, the radiator 1, the AC board 4, the DC board The card 5 and the control board card 7 are integrated in the sub-modules, and each sub-module can independently manage and control the battery module through modular design and coordinated control technology, with high control precision and low requirements for battery consistency. The powertrain sub-module assembly involved in the present invention is applied to a pure electric vehicle powertrain system. The powertrain system is composed of a variable number of sub-modules, and realizes the functions of energy storage battery, battery energy management, motor control, power distribution, etc. The high integration of functions such as electricity and on-board charging has greatly reduced the production and maintenance costs of electric vehicle power systems. The sub-modules are designed with modular structure and have consistency. The system with any number of sub-modules adopts the same control structure, which has good redundancy and strong expansibility. The installation method in the vehicle body is more flexible, which can effectively improve the interior space Utilization and endurance.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A modularized powertrain sub-module assembly, characterized in that it comprises a radiator (1), a power device (2), an AC board (4), a DC board (5) and a control board (7) ); Power devices (2) are respectively installed on both sides of the heat sink (1), and an AC board (4) and a DC board (5) are sequentially connected to both sides of the power device (2), and the control board The card (7) is installed on the outer side of one of the DC boards (5), and the power device (2), the AC board (4), the DC board (5) and the control board (7) pass through the structural parts (6) Fixed on both sides of the radiator (1); The power device (2) comprises a first switch tube (21), a second switch tube (22), a third switch tube (23) and a fourth switch tube (24), the first switch tube (21), The second switch tube (22), the third switch tube (23) and the fourth switch tube (24) are all provided with S pole pins, D pole pins and G pole pins; The AC board (4) leads out an AC first port (41) and an AC second port (42), and the DC board (5) leads out a positive port (51), a negative port (52), a first a fault signal port (53) and a first drive signal port (54); The control board (7) leads out a second fault signal port (71), a second drive signal port (72), a first battery signal port (73), a second battery signal port (74), and a first download port (75) and the second download port (76). 2. The modular-based powertrain sub-module assembly according to claim 1, wherein the S pole pin of the first switch tube (21) and the D pole pin of the third switch tube (23) The first AC port (41) is connected through the electrical connector, the S pole pin of the second switch tube (22) and the D pole pin of the fourth switch tube (24) are connected to the AC second port through the electrical connector (42) CONNECTIONS. 3. The modularized powertrain sub-module assembly according to claim 1, wherein the D pole pins of the first switch tube (21) and the second switch tube (22) pass through a DC board ( 5) The pin hole (10) is connected to the positive terminal (51), and the S pole pins of the third switch tube (23) and the fourth switch tube (24) pass through the DC card (5) The pin hole (10) on the upper part is connected to the negative terminal (52). 4. The modular-based powertrain sub-module assembly according to claim 1, wherein the first switch tube (21), the second switch tube (22), the third switch tube (23), the first switch tube (21), the third switch tube (23), the All G pole pins of the four switch tubes (24) are connected to the first driving signal port (54) of the DC board (5) through the pin through holes (10) on the DC board (5). The first driving signal port (54) is connected to the second driving signal port (72) corresponding to the control board (7) through an electrical connector. 5. The modularized powertrain sub-module assembly according to claim 1, wherein the first switch tube (21), the second switch tube (22), the third switch tube (23), the first switch tube (21), the third switch tube (23), the All D and S pole pins of the four switch tubes (24) are connected to the first fault signal port (53) of the DC board (5) through the pin through holes (10) on the DC board (5). The signal port (53) is connected to the second fault signal port (71) corresponding to the control board (7) through an electrical connector. 6. The modularized powertrain sub-module assembly according to claim 1, wherein the AC first port (41) is externally connected to the AC second port of adjacent sub-modules, and each bridge arm is composed of multiple The sub-modules are connected in series, and the AC first port of the first sub-module and the AC second port of the last sub-module in the bridge arm are used as external input or output ports of the system. 7. The modularized powertrain sub-module assembly according to claim 1, wherein the positive port (51) is externally connected to the positive port of the battery module, and the negative port (52) is externally connected to the battery on the negative terminal of the module. 8 . The modularized powertrain sub-module assembly according to claim 1 , wherein the control board ( 7 ) controls the work of the two sub-modules, and the first battery signal port ( 73 ) is connected to the outside. 9 . On the signal port of the battery module, the second battery signal port (74) is externally connected to the signal port of another battery module. 9 . The modularized powertrain sub-module assembly according to claim 1 , wherein the system power of the power device ( 2 ) is increased by increasing the number of parallel switches of the power device ( 2 ). 10 . There are three groups of switch tubes. 10. The modular-based powertrain sub-module assembly according to claim 1, wherein a thermally conductive material (3) is provided between the power device (2) and the radiator (1).