CN202564988U - Charge-discharge control circuit for vehicle-use power battery - Google Patents
Charge-discharge control circuit for vehicle-use power battery Download PDFInfo
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- CN202564988U CN202564988U CN2012201853525U CN201220185352U CN202564988U CN 202564988 U CN202564988 U CN 202564988U CN 2012201853525 U CN2012201853525 U CN 2012201853525U CN 201220185352 U CN201220185352 U CN 201220185352U CN 202564988 U CN202564988 U CN 202564988U
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Abstract
Disclosed is a charge-discharge control circuit for vehicle-use power battery, at least comprising a flexible connection battery module 1, a data acquisition module 2, and a control module 3, wherein the flexible connection battery module 1 at least comprises a battery unit and a flexible connection unit. The utility model realizes the switching between battery connection modes of the vehicle-use power battery under the conditions of charge and discharge by adopting a flexible connection unit. When the vehicle-use power battery is charged, all the battery units are serially connected for charging, thereby being easy to realize rapid charging of undercurrent under high voltage and accelerating the charging speed. When the vehicle-use power battery is discharged, the battery units are firstly parallelly connected and then serially connected, thereby decreasing the fault rate of the complete battery system. The charge-discharge control circuit can well keep the consistency of the battery units, give each battery unit a full play, fully utilizes the battery capacity, prolong the service lifetime of the battery, and has great practical value.
Description
Technical field
The utility model relates to electric automobile field and battery management system field, particularly a kind of Vehicular dynamic battery group charge-discharge control circuit.
Background technology
Current; Energy shortage and environmental pollution are the major reasons of restriction human kind sustainable development, for two challenges greatly especially of world car industrial development now, in electric automobile research and development process; Electrokinetic cell and management system thereof are wherein of paramount importance rings as power source and auxiliary power source block; For guaranteeing that battery performance is good, prolong electrokinetic cell useful life, must be provided with that special management system detects its operating state and rational and effective management and control; Cooperating normal control system to realize the fail safe of car load, and optimize operation.
In the prior art, the automobile power cell group is when charging and discharge, and the connected mode between battery cell and the battery cell is changeless.If battery pack adopts all connected mode discharges of series connection of battery cell; The reliability of entire cell group system is not high; Battery pack is not long useful life, and the fault of battery cell can directly have influence on the operate as normal of whole power-supply system, may cause the failure rate of power-supply system to improve rapidly; If the battery pack employing battery cell mode of being connected in parallel entirely discharges; Then do not reach equipment required voltage values such as external motor; When adopting this connected mode quick charge, the battery pack Internal cable need bear sizable electric current, also is unfavorable for the exploitation of charging device simultaneously; If battery pack adopts the battery cell string and mixes the connected mode charging, then be difficult to realize the quick charge of the little electric current of battery pack high voltage.
Summary of the invention
The purpose of the utility model is to overcome the deficiency and the defective of prior art; A kind of Vehicular dynamic battery group charge-discharge control circuit is provided; The mode that flexibly connects through employing; Realize the switching of the battery cell connected mode of Vehicular dynamic battery group under charging and discharge scenario, finally give full play to the characteristic of each battery cell, it is discharged and recharged be in optimum state.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is following:
The utility model provides a kind of Vehicular dynamic battery group charge-discharge control circuit, and it mainly comprises and flexibly connects battery module 1, data acquisition module 2 and control module 3; The said output that flexibly connects battery module 1 is connected with the input of data acquisition module 2; The output of said data acquisition module 2 is connected with the input of control module 3; The output of said control module 3 is connected with the input that flexibly connects battery module 1, and control flexibly connects battery module 1.
The said battery module 1 that flexibly connects comprises battery unit and flexible connection unit at least; Flexible connection unit is connected with battery cell; And the quantity of battery unit and the quantity of flexible connection unit equate that battery unit quantity is at least two, and flexible connection unit quantity is at least two; Said battery unit is made up of n battery cell, and said flexible connection unit is made up of n-1 AUTOMOTIVE RELAY, and n is at least 2.
Said cell flexible linkage unit; Action through AUTOMOTIVE RELAY; Realization is to the series connection of the battery cell in the battery unit that flexibly connects battery module 1 and the switching between the parallelly connected state: when said when flexibly connecting battery module 1 charging; AUTOMOTIVE RELAY normally-closed contact in each flexible connection unit breaks off, and normally opened contact is closed, the battery cell series connection in each battery unit; Be in series connection between each battery unit, all batteries monomer that flexibly connects battery module 1 when promptly charging is in series connection; When said when flexibly connecting battery module 1 discharge; AUTOMOTIVE RELAY normally-closed contact in each cell flexible linkage unit is closed; Normally opened contact breaks off; The battery cell that flexibly connects in each battery unit in the battery module 1 is parallelly connected, flexibly connects between each battery unit in the battery module 1 to be in series connection, and the battery cell that flexibly connects when promptly discharging in the battery module 1 is in parallel connection back series connection earlier.
The control that said control module 3 is sent flexibly connects the AUTOMOTIVE RELAY actuating signal of the flexible connection unit in the battery module 1, is used for controlling the action of the AUTOMOTIVE RELAY of cell flexible linkage unit.
Said data acquisition module 2 gather voltage, the battery cell of battery cells temperature, flexibly connect assembled battery total voltage and flexibly connect the battery pack total current, and be sent to control module 3; Described control module 3 with the data that data acquisition module 2 transmission comes analyze, judge, state-of-charge (the State of Charge of processing and estimating battery; SoC); And with above-mentioned data storing; Control module 3 judges through data analysis whether battery cell voltage and battery cell temperature are higher or lower than threshold values, thereby fault alarm is carried out in the unlatching of balanced unit in the control control module 3 and temperature conditioning unit or close when battery cell or battery unit break down.Said control module 3 also is provided with communication interface, is used for the transfer of data with supervisory control system.
The beneficial effect of the utility model is:
(1) the Vehicular dynamic battery group adopts and flexibly connects battery module; Can realize the flexible switching of battery pack at the connecting circuit of the battery cell under charging and the discharge scenario: battery cell adopts all connected modes of series connection when charging; Can make battery realize the quick charge of the little electric current of high voltage easily with such connected mode; Improve the charging rate of battery; And the diameter when battery pack Internal cable diameter adopts all parallelly connected connected mode large current charge than battery cell during charging is little, requires low to charger; Battery cell adopts the connected mode discharge of parallel connection back series connection earlier when discharge, and the battery cell parallel connection can increase the capacity of battery pack, thereby increases the battery pack output-current rating.
(2) battery pack is used and is flexibly connected; Can improve the fail safe and the reliability of battery pack: the vehicle ' process, battery pack is in discharge condition, and battery cell is the connected mode of parallel connection back series connection earlier; Compare with the whole series connection of battery cell; If certain battery cell damages and battery cell occurs and opens a way in the battery unit, this flexible connection mode can not cause the paralysis of the electric power system of car load, and is less to the influence of battery pack; Compare with the whole parallel connections of battery cell; If battery cell is short-circuited; The destruction that the destruction that this flexible connection mode causes does not have battery cell to adopt whole modes of being connected in parallel to cause is big; Thereby the connected mode that is higher than other with the battery pack system fail safe of this flexible connection mode discharge and reliability, the failure rate of reduction entire cell group system.
(3) flexibly connect the balanced discharge that circuit can be realized battery pack: in the battery power discharge process; If the some battery cell voltage in the battery unit is less than normal; The discharge automatically of inner other battery cells of battery unit; Thereby realize that to the charging of low-voltage battery monomer i.e. this flexible connection mode automatic equalization discharge of battery unit internal cell monomer when discharge can not cause the phenomenon of battery unit internal cell monomer over-discharge can.
(4) life-span of raising Vehicular dynamic battery group: adopt the battery pack that flexibly connects to make battery cell in use bring into play the optkmal characteristics of each battery cell; The consistency of battery cell keeps good in the battery unit, the life-span that can fully use the capacity of battery cell and improve battery pack.
Description of drawings
Fig. 1 flexibly connects the system configuration sketch map for the utility model Vehicular dynamic battery group;
Fig. 2 is the battery cell commutation circuit schematic diagram in the battery unit;
Fig. 3 implements illustration for flexibly connecting the battery module charging circuit;
Fig. 4 implements illustration for flexibly connecting the battery module discharge circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
The utility model Vehicular dynamic battery group flexibly connects the system configuration sketch map; As shown in Figure 1; The action control signal that the cell flexible linkage unit of control module 3 in flexibly connecting battery module 1 sends AUTOMOTIVE RELAY; Drive flexible connects the AUTOMOTIVE RELAY action in the flexible connection unit in the battery module 1; Through the action of AUTOMOTIVE RELAY, realize flexibly connecting series connection and the switching between the parallelly connected state between the battery cell in the battery unit in the battery module 1.
Data acquisition module 2 on-line measurements flexibly connect battery cell voltage, battery cell temperature in the battery unit in the battery module 1, flexibly connect the total current value of battery module 1 and flexibly connect the total voltage value of battery module 1, and these data are sent in the control module 3; The data that control module 3 is uploaded data acquisition module 2 are carried out corresponding real-time operation, condition discrimination and estimating battery carrying capacity according to predetermined Mathematical Modeling and management mode, and make control corresponding.
Flexibly connect to adopt between the battery unit in the battery module 1 and be connected in series; Flexibly connect the battery cell commutation circuit schematic diagram in the battery unit in the battery module 1; As shown in Figure 2, when flexibly connecting battery module 1 discharge, the normally-closed contact Sa and the normally-closed contact Sb of the AUTOMOTIVE RELAY in each cell flexible linkage unit close; Normally opened contact Sc breaks off; The battery cell that flexibly connects in each battery unit in the battery module 1 is connected in parallel, and flexibly connects between each battery unit in the battery module 1 to be in series connection, and the battery cell that promptly flexibly connects in the battery module 1 is in parallel connection back series connection earlier; When flexibly connecting battery module 1 charging; The normally-closed contact Sa of the AUTOMOTIVE RELAY in each flexible connection unit and normally-closed contact Sb break off; Normally opened contact Sc is closed; The interior battery cell of each battery unit this moment is connected in series, and is in series connection between each battery unit, and all batteries monomer that flexibly connects when promptly charging in the battery module 1 is in series connection.
The utility model battery unit in the practical implementation process is made up of two or two above battery cells at least, and one flexibly connects battery pack and is made up of two or more battery units series connection at least.The utility model flexibly connects battery module 1 charging circuit and implements illustration, and is as shown in Figure 3, flexibly connects battery module 1 discharge circuit and implements illustration, as shown in Figure 4.The whole battery pack that flexibly connects is by 20 battery units among Fig. 3 and Fig. 4; From battery unit BATT 1 to battery unit BATT 20; A battery unit is by 4 battery cells; Promptly form a battery unit, wherein n=1,2 from battery cell Bn1 to battery cell Bn4 ... 20, promptly whole flexibly connecting has 80 battery cells in the battery pack; Flexibly connect battery module 1 in 20 battery units and 20 the flexible connection unit pie graphs 1.Each flexible connection unit that flexibly connects in the battery module 1 comprises three AUTOMOTIVE RELAYs, and three contacts are arranged in each AUTOMOTIVE RELAY: normally-closed contact Sa, normally-closed contact Sb and normally opened contact Sc.
As shown in Figure 3; Flexibly connect battery module 1 when battery charge; AUTOMOTIVE RELAY normally-closed contact Sa and normally-closed contact Sb all break off, and normally opened contact Sc is closed, and the battery cell Bn1, battery cell Bn2, battery cell Bn3 and the battery cell Bn4 that then flexibly connect in each battery unit in the battery module 1 are in series connection; N=1,2 wherein ... 20; Flexibly connecting in the battery module 1 from battery unit BATT_1 to battery unit BATT_20, is to be in series connection between them, and the whole all batteries monomer that flexibly connects in the battery module 1 is that the circuit mode that is in series connection connects when promptly flexibly connecting battery module 1 charging.
As shown in Figure 4; Flexibly connect battery module 1 when battery discharge; AUTOMOTIVE RELAY normally-closed contact Sa and normally-closed contact Sb are all closed; Normally opened contact Sc breaks off; The battery cell Bn1, battery cell Bn2, battery cell Bn3 and the battery cell Bn4 that then flexibly connect in each battery unit in the battery module 1 are in parallelly connected state, flexibly connect in the battery module 1 to be in series connection from battery unit BATT_1 to battery unit BATT_20, and the whole battery cell that flexibly connects in the battery module 1 is that the circuit mode that is in parallelly connected earlier back series connection connects when promptly flexibly connecting battery module 1 discharge.
In this specification, should be pointed out that above embodiment only is the more representational example of the utility model.Anyly be familiar with this operator, in spirit that does not break away from the utility model and scope, when doing various changes and retouching.Obviously; The utility model is not limited to above-mentioned specific embodiment; Specification and accompanying drawing are regarded in an illustrative, rather than a restrictive; Every technical scheme according to the utility model is made amendment, modification or equivalent variations, and does not break away from the thought and the scope of the utility model technical scheme, and it all should be encompassed in protection scope of the present invention.Make the content of detailed description in this specification, belong to the prior art that this area professional and technical personnel knows altogether.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201853525U CN202564988U (en) | 2012-04-27 | 2012-04-27 | Charge-discharge control circuit for vehicle-use power battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201853525U CN202564988U (en) | 2012-04-27 | 2012-04-27 | Charge-discharge control circuit for vehicle-use power battery |
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| CN202564988U true CN202564988U (en) | 2012-11-28 |
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| CN2012201853525U Expired - Fee Related CN202564988U (en) | 2012-04-27 | 2012-04-27 | Charge-discharge control circuit for vehicle-use power battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624065A (en) * | 2012-04-27 | 2012-08-01 | 广西大学 | A charging and discharging control circuit for a vehicle power battery pack |
| CN105896670A (en) * | 2016-05-25 | 2016-08-24 | 乐视控股（北京）有限公司 | Charging device and mobile terminal |
| WO2018130020A1 (en) * | 2017-01-13 | 2018-07-19 | Gp Batteries International Limited | Power supply methods and apparatus |
-
2012
- 2012-04-27 CN CN2012201853525U patent/CN202564988U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624065A (en) * | 2012-04-27 | 2012-08-01 | 广西大学 | A charging and discharging control circuit for a vehicle power battery pack |
| CN105896670A (en) * | 2016-05-25 | 2016-08-24 | 乐视控股（北京）有限公司 | Charging device and mobile terminal |
| WO2018130020A1 (en) * | 2017-01-13 | 2018-07-19 | Gp Batteries International Limited | Power supply methods and apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20210427 |
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| CF01 | Termination of patent right due to non-payment of annual fee |