CN203398816U - Power battery group equalization device - Google Patents
Power battery group equalization device Download PDFInfo
- Publication number
- CN203398816U CN203398816U CN201320372030.6U CN201320372030U CN203398816U CN 203398816 U CN203398816 U CN 203398816U CN 201320372030 U CN201320372030 U CN 201320372030U CN 203398816 U CN203398816 U CN 203398816U
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- Prior art keywords
- equalization
- module
- cell
- circuit
- balance module
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Abstract
The utility model relates to a power battery group equalization device. The device comprises equalization modules of single batteries, which are used for carrying out equalization operation on single batteries. Each equalization module is connected in parallel with the corresponding single battery to form a single battery charging circuit. The equalization modules are connected through a CAN bus and are connected with a host computer through the CAN bus. The input of each equalization module is connected with a direct current power supply. The output end of each equalization module is respectively connected in series with a normally open relay. According to the utility control model, the equalization modules have the same structure and respectively independently control a single battery; for power battery groups of different strings, the equalization modules of different numbers can be configured to realize equalization; through a DC/DC module in each equalization module, different equalization policies can be conveniently and flexibly configured; by setting equalized voltage and equalized current, the equalization demands of power battery groups of different capacity and different single rated voltage can be met; and the equalization modules of the single batteries can carry out equalization operation at the same time, so that the equalization time is reduced and the equalization efficiency is improved.
Description
Technical field
The utility model belongs to electric automobile and new energy resource power battery technical field, relates to a kind of universal power battery pack balancer.
Background technology
In the situation that Present Global auto industry faces the huge challenge of financial crisis and energy environment issues; Development of EV; realize the electrification of energy source of car dynamical system, promote the strategic transformation of orthodox car industry, formed in the world extensive common recognition.Electrokinetic cell, as a key technology of electric automobile, has played vital effect to the development of whole electric automobile industry.
At present, the Main Bottleneck that hinders electrokinetic cell development is power battery management system, conventionally the mode that electrokinetic cell adopts a plurality of cells to connect is automobile power supply, but because each cell is difficult to accomplish monolithic discharging and recharging, therefore cause each cell in battery pack to occur discharging and recharging unbalanced situation, the phenomenon that there will be undercharge and overdischarge, this situation can cause battery performance sharply to worsen, finally cause whole Battery pack to work, even scrap, thereby greatly affect useful life and the unfailing performance of battery.For guaranteeing the consistency of each monomer in battery pack, it is carried out to equilibrium control and be necessary.At present in domestic existing balancing technique: the problem of concentrating transformer method maximum is that the consistency of secondary output winding is difficult to guarantee, easily causes equalization deviation, and cannot make up; In switching capacity method, switching device is many, balanced needs for a long time; But dissipation method cost is minimum, be only applicable to the battery that capacity is less, cannot adapt to large current balance.
Present stage, electrokinetic cell can be divided into lead-acid battery, nickel-cadmium cell, Ni-MH battery, lithium battery etc. according to the difference of material.The electrokinetic cell of different materials, monomer whose rated operational voltage is different.Meanwhile, according to the difference of electric automobile vehicle, the electrokinetic cell monomer capacity configuring, set of monomers string number is also different.At present, also there is no the electrokinetic cell balancer that can be applicable to different materials, different capabilities, not go here and there on the same group number.
Utility model content
The purpose of this utility model is to provide a kind of electrokinetic cell balancer, so that different materials, different capabilities, the electrokinetic cell of number of not going here and there are on the same group carried out to equilibrium, solves the problem that existing electrokinetic cell portfolio effect is poor, time for balance is long.
For achieving the above object, the technical scheme of power battery pack balancer of the present utility model is as follows: comprise for cell being carried out to the balance module of each cell of equalization operation, this balance module is for forming cell charge circuit with corresponding cell parallel connection, between each balance module by CAN bus interconnection and be all connected in host computer by CAN bus, the input of each balance module all accesses a DC power supply, and the output of each balance module is serially connected with respectively normally opened relay.
Further, described balance module comprises control unit and DC/DC module.
Further; described control unit comprises data acquisition circuit, feedback control circuit, protective circuit and telecommunication circuit; described data acquisition circuit comprises cell voltage collection, output voltage collection and output current Acquisition Circuit; described feedback control circuit comprises Voltage loop and electric current loop dual-loop control circuit, and described protective circuit comprises output overvoltage and output overcurrent protection and alarm circuit thereof.
In electrokinetic cell balancer of the present utility model, the control one joint cell that each balance module structure is identical and separate, for the realization of the balance module of the configurable different numbers of power battery pack of string is not balanced on the same group, DC/DC module in balance module can be convenient, flexible the different balance policies of configuration, DC/DC module can meet different capabilities by setting equalizing voltage and euqalizing current simultaneously, the balanced demand of the power battery pack of different monomers rated voltage, the balance module of each cell can carry out equalization operation according to the equilibrium order of host computer simultaneously, reduced time for balance, improved balanced efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electrokinetic cell balancer embodiment;
Fig. 2 is the flow chart of the balanced embodiment of electrokinetic cell.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
As shown in Figure 1, power battery pack comprises the cell B of n series connection
1, B
2b
n, corresponding each cell B
n, have a balance module U
nin parallel with it, form an independently charge circuit.Balance module U
1with cell B
1 form charge circuit 1; U
2with cell B
2form charge circuit 2; U
nwith cell B
nform charge circuit n; Between each balance module, again by CAN bus interconnection, by host computer unified monitoring, the input of each balance module all connects same DC power supply, and each balance module output is all equipped with relay, and before balanced order starts, relay is in off-state.Balance module comprises control unit and DC/DC module.Control unit comprises data acquisition circuit, feedback control circuit, protective circuit and telecommunication circuit; described data acquisition circuit comprises cell voltage collection, output voltage collection and output current Acquisition Circuit; feedback control circuit comprises Voltage loop and electric current loop dual-loop control circuit, and protective circuit comprises output overvoltage and output overcurrent protection and alarm circuit thereof.Communication adopts CAN bus mode.
The dynamic lithium battery group equalization operation of take is example, and as Fig. 2, balanced order is assigned to each balance module U by CAN bus
n, each balance module U
nin control unit be responsible for Real-time Collection corresponding cell B with it
nthe voltage at two ends, has gathered the monomer battery voltage that rear judgement collects and whether has been more than or equal to 3.65V; If be more than or equal to 3.65V, show that this joint cell does not need to carry out equalization operation, corresponding Ci road balance module is not worked; If cell B
nvoltage is less than 3.65V, and corresponding balance module output relay is closed, further judges this joint cell B
nwhether voltage is less than 3.6V, if this joint cell B
nvoltage is less than 3.6V, and the DC/DC module in corresponding balance module will be carried out constant current charge to cell to set current value 10A; If this joint cell B
nvoltage is greater than 3.6V, the DC/DC module in corresponding balance module will be carried out constant voltage charge to cell with setting voltage value 3.65V, the constant voltage charge stage, control unit in balance module detects the size of charging current in real time, if charging current is less than set point 1A, balance module output relay disconnects, and shows that this corresponding joint cell equilibrium completes.After equilibrium completes, corresponding balance module is completed equilibrium in information and gives host computer by CAN bus, and after all cell all equilibriums complete, host computer points out whole power battery pack equilibrium to complete.
The utility model, according to power battery pack classification, is selected suitable balance policy, configures high-precision AD and gathers, and can make all cells in power battery pack fully charge, and can guarantee balanced consistency.
Claims (3)
1. power battery pack balancer, it is characterized in that: comprise for cell being carried out to the balance module of each cell of equalization operation, this balance module is for forming cell charge circuit with corresponding cell parallel connection, between each balance module by CAN bus interconnection and be all connected in host computer by CAN bus, the input of each balance module all accesses a DC power supply, and the output of each balance module is serially connected with respectively normally opened relay.
2. power battery pack balancer according to claim 1, is characterized in that: described balance module comprises control unit and DC/DC module.
3. power battery pack balancer according to claim 2; it is characterized in that: described control unit comprises data acquisition circuit, feedback control circuit, protective circuit and telecommunication circuit; described data acquisition circuit comprises cell voltage collection, output voltage collection and output current Acquisition Circuit; described feedback control circuit comprises Voltage loop and electric current loop dual-loop control circuit, and described protective circuit comprises output overvoltage and output overcurrent protection and alarm circuit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320372030.6U CN203398816U (en) | 2013-06-26 | 2013-06-26 | Power battery group equalization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320372030.6U CN203398816U (en) | 2013-06-26 | 2013-06-26 | Power battery group equalization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203398816U true CN203398816U (en) | 2014-01-15 |
Family
ID=49910316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320372030.6U Expired - Lifetime CN203398816U (en) | 2013-06-26 | 2013-06-26 | Power battery group equalization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203398816U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337889A (en) * | 2013-06-26 | 2013-10-02 | 许继集团有限公司 | Power battery balancing device and method |
| CN111313489A (en) * | 2018-12-11 | 2020-06-19 | Oppo广东移动通信有限公司 | Electronic device, charging method and storage medium |
| CN113078714A (en) * | 2021-04-12 | 2021-07-06 | 华为技术有限公司 | Energy storage system and energy storage system control method |
-
2013
- 2013-06-26 CN CN201320372030.6U patent/CN203398816U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337889A (en) * | 2013-06-26 | 2013-10-02 | 许继集团有限公司 | Power battery balancing device and method |
| CN111313489A (en) * | 2018-12-11 | 2020-06-19 | Oppo广东移动通信有限公司 | Electronic device, charging method and storage medium |
| CN111313489B (en) * | 2018-12-11 | 2022-10-18 | Oppo广东移动通信有限公司 | Electronic device, charging method and storage medium |
| CN113078714A (en) * | 2021-04-12 | 2021-07-06 | 华为技术有限公司 | Energy storage system and energy storage system control method |
| CN113078714B (en) * | 2021-04-12 | 2023-09-22 | 华为数字能源技术有限公司 | Energy storage system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |
|
| CX01 | Expiry of patent term |