CN201426046Y - Power management system for car high power lithium battery stack with balancing function - Google Patents
Power management system for car high power lithium battery stack with balancing function Download PDFInfo
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- CN201426046Y CN201426046Y CN2009200708594U CN200920070859U CN201426046Y CN 201426046 Y CN201426046 Y CN 201426046Y CN 2009200708594 U CN2009200708594 U CN 2009200708594U CN 200920070859 U CN200920070859 U CN 200920070859U CN 201426046 Y CN201426046 Y CN 201426046Y
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Abstract
The utility model relates to a power management system for a car high power lithium battery stack with balancing function. The lithium battery stack comprises a plurality of battery units, wherein each battery unit comprises a plurality of single cells. The power management system for the car high power lithium battery stack with balancing function comprises a master control module, a display module and a plurality of sub-control modules corresponding to the plurality of battery units one to one. The master control module is connected with the plurality of sub-control modules through a bus; each sub-control module comprises a voltage measuring unit, a balancing unit and a control processing unit; an input end of the voltage measuring unit is connected with the positive terminals and the negative terminals of the plurality of single cells in the corresponding battery unit, an output end of the voltage measuring unit is connected with the control processing unit; an input end of the balancing unit is connected with the control processing unit, an output end of the balancing unit is connected with the positive terminals and the negative terminals of the plurality of single cells in the corresponding battery unit, and the display module is connected with the master control module. The power management system for the car high power lithium battery stack with balancing function can detect the working condition of the battery stack at any time, display related data, and balance energy of heavy current, thereby increasing the service life and the safety of the lithium battery.
Description
Technical field
The utility model relates to a kind of power-supply management system of high power lithium battery pack.
Background technology
Lithium battery is one of green energy resource, and development prospect is vast.The lithium battery of low capacity (10A/h is following) application at present is more, and the application of high-capacity lithium battery is ground zero then.Automobile-used lithium battery group is in series by a plurality of battery cells, and global voltage has the large capacity single body battery about 100 that protection and effectively charging need be provided between 300V-500V approximately.At present, mainly rely on the measured chip of import to carry out simple protective, its function is few, management is simple, and very big hidden danger is buried in safe handling, even the accident that has the electronic lithium battery automobile of report repeatedly to blast.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of high-power power supply management system for lithium battery pack of automobile-used band equilibrium function is provided, this system can monitor the working condition of each battery cell in real time, each battery cell is carried out the energy balance management, and can carry out data communication.
The technical scheme that the utility model adopted is: a kind of high-power power supply management system for lithium battery pack of automobile-used band equilibrium function, this lithium battery group comprises several battery units, each battery unit is made up of a plurality of battery cells, this management system comprise master control module, display module and with a plurality of one to one sub-control modules of a plurality of battery units; Wherein, master control module links to each other with a plurality of sub-control modules by bus; Each sub-control module comprises voltage measurement unit, balancing unit and controlled processing unit; The positive pole of each battery cell in the input of voltage measurement unit and the pairing battery unit links to each other with negative pole, and output links to each other with controlled processing unit; The input of balancing unit links to each other with controlled processing unit, and the positive pole of each battery cell in output and the pairing battery unit links to each other with negative pole, and display module links to each other with the master control module.
The utility model constantly detects the operating state of lithium battery group and shows related data in the running of lithium battery group, general protection is provided, and carries out the energy balance of big electric current, thereby can improve performance, useful life and the fail safe of lithium battery.Because what the utility model adopted is principal and subordinate's control structure, decentralized control centralized management pattern, when setting up various lithium battery group as required with different lithium number of batteries, only need the sub-control module of plus-minus to get final product, separate between each sub-control module, can exchange, thereby make things convenient for management and maintenance.In addition, voltage measurement unit of the present utility model adopts universal elements to substitute expensive chip inlet, has saved cost, and has had high accuracy (can reach the 0.05%mV precision after overcorrect), anti-high pressure, jamproof advantage.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of voltage measurement unit of the present utility model;
Fig. 3 is the circuit theory diagrams of balancing unit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is made and to be further specified.
With reference to figure 1, in the high-power power supply management system for lithium battery pack of automobile-used band equilibrium function of the present utility model, the lithium battery group comprises one or more battery units 9, and each battery unit 9 is made up of a plurality of battery cells 91.Preferably, battery unit 9 is made up of 7-10 battery cell 91.This high-power power supply management system for lithium battery pack comprise master control module 1, display module 2 and with a plurality of one to one sub-control modules 3 of a plurality of battery units 9.Master control module 1 links to each other with a plurality of sub-control modules 3 by bus 4.Each sub-control module 3 comprises voltage measurement unit 31, balancing unit 32 and controlled processing unit 33.The positive pole of each battery cell 91 in the input of voltage measurement unit 31 and the pairing battery unit links to each other with negative pole, output links to each other with controlled processing unit 33, is used to measure the magnitude of voltage of battery cell 91 and the magnitude of voltage of measuring is sent to controlled processing unit 33.The input of balancing unit 32 links to each other with control and treatment subelement 33, and the positive pole of each battery cell 91 in output and the pairing battery unit links to each other with negative pole.Controlled processing unit 33 can be provided with charging initial value, charge protection value, discharge prevention value, charging balance window value and the discharge balance window value of each battery cell in its pairing battery unit.Utilize master control module 1 to make amendment to the above-mentioned parameter that each controlled processing unit 33 is provided with.To be charged as example: when charging, the magnitude of voltage of each battery cell compares with the charging initial value that sets in the battery unit that controlled processing unit 33 at first records voltage measurement unit 31, begins charging then.When entering balance, the calculating voltage value surpasses the average voltage of all battery cells of charging balance initial value, all battery cells that surpass average voltage are compared respectively again, if the voltage difference between two battery cells is greater than charging balance window value, then controlled processing unit 33 is controlled balancing units 32, and that battery cell high to magnitude of voltage carries out balance work.The principle of discharge Balance Control and charge type are seemingly.Charging balance window value and discharge balance window value all are value ranges.In a kind of execution mode of the present utility model, the charging initial value is 3.3V, and charging balance initial value is 3V; charging balance window value is 0.5V (voltage spread); the discharge prevention value is 2.5V, and discharge balance initial value is 3.5V, and discharge balance window value is 0.5V.Display module 2 links to each other with master control module 1, and the operating voltage and the work state information of each battery cell that each sub-control module 3 is gathered can send to master control module 1 by communication bus 4, and shows on display module 2.Master control module 1 comprises single-chip microcomputer, various protective circuit, self-detection circuit warning circuit etc.
The lithium battery group is charged by the external charging power supply, the size of the charging current of master control module 1 may command external charging power supply of the present utility model, and can control the open and close of external charging power supply by relay.
The circuit structure of voltage measurement unit 31 of the present utility model comprises differential amplifier U3A, differential amplifier power vd D5, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and capacitor C as shown in Figure 2.The positive terminal of differential amplifier U3A links to each other with the positive pole of battery cell 91 with first resistance R, 1 series connection back, and end of oppisite phase links to each other with the negative pole of battery cell 91 with second resistance R, 2 series connection backs, and output links to each other with controlled processing unit 33 with the 3rd resistance R 3 series connection backs.The 4th resistance R 4 is connected across between the output and end of oppisite phase of differential amplifier U3A.One end of the 5th resistance R 5 links to each other with the positive terminal of differential amplifier U3A, and the other end links to each other with an end of the 6th resistance R 6, and the other end of the 6th resistance R 6 links to each other with the output of differential amplifier U3A.One end of the 7th resistance R 7 links to each other with the positive pole of differential amplifier power vd D5, and the other end links to each other with an end of capacitor C, and the other end of this capacitor C links to each other with the common contact of the 5th resistance R 5 with the 6th resistance R 6.This voltage measurement unit 31 also comprises a voltage-stabiliser tube D700, the positive pole of voltage-stabiliser tube D700 links to each other with the common contact of the 5th resistance and the 6th resistance, negative pole links to each other with the common contact of the 3rd resistance R 3 and controlled processing unit 33, and the common contact ground connection of the 5th resistance R 5 and the 6th resistance R 6.This voltage measurement unit 31 can be converted to 33 receptible electronegative potential values of controlled processing unit with the high potential difference measured value after measuring.
The circuit structure of balancing unit 32 of the present utility model as shown in Figure 3, comprise a NMOSFET power tube Q711 and a current-limiting resistance R711, the grid G of this NMOSFET power tube Q711 links to each other with controlled processing unit 33, source S links to each other with the positive pole of battery cell 91, drain D links to each other with the end of current-limiting resistance R711, and the other end of this current-limiting resistance R711 links to each other with the negative pole of battery cell 91.Balancing unit 32 can be under the control of controlled processing unit 33, when charging and discharge the energy of battery cell 91 by resistance consumption and transfer.This balancing unit can be carried out the balanced balanced current of 5-10A.
High-power power supply management system for lithium battery pack of the present utility model also is provided with memory module, alarm module, selftest module etc., can realize protection, monitoring, reports to the police, shows, stores, self detect and various communication.The utility model can be applicable to Large Electric bus, automobile, boats and ships, motor machine etc. to have in the product of high power lithium battery pack.
Claims (5)
1. the high-power power supply management system for lithium battery pack of an automobile-used band equilibrium function, described lithium battery group comprises several battery units, each battery unit is made up of a plurality of battery cells, it is characterized in that, this management system comprise master control module, display module and with a plurality of one to one sub-control modules of described a plurality of battery units; Wherein, described master control module links to each other with a plurality of sub-control modules by bus; Each sub-control module comprises voltage measurement unit, balancing unit and controlled processing unit; The positive pole of each battery cell in the input of described voltage measurement unit and the pairing battery unit links to each other with negative pole, and output links to each other with described controlled processing unit; The input of described balancing unit links to each other with controlled processing unit, and the positive pole of each battery cell in output and the pairing battery unit links to each other with negative pole, and described display module links to each other with the master control module.
2. the high-power power supply management system for lithium battery pack of automobile-used band equilibrium function as claimed in claim 1, it is characterized in that described voltage measurement unit comprises differential amplifier, differential amplifier power supply, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and electric capacity; The positive terminal of described differential amplifier links to each other with the positive pole of battery cell with first resistance series connection back, and end of oppisite phase links to each other with the negative pole of battery cell with second resistance series connection back, and output links to each other with controlled processing unit with the 3rd resistance series connection back; Described the 4th resistance is connected across between the output and end of oppisite phase of differential amplifier; One end of described the 5th resistance links to each other with the positive terminal of differential amplifier, and the other end links to each other with an end of described the 6th resistance, and the other end of the 6th resistance links to each other with the output of differential amplifier; One end of described the 7th resistance links to each other with the positive pole of described differential amplifier power supply, and the other end links to each other with an end of described electric capacity; The other end of this electric capacity links to each other with the common contact of the 5th resistance and the 6th resistance.
3. the high-power power supply management system for lithium battery pack of automobile-used band equilibrium function as claimed in claim 2, it is characterized in that, described voltage measurement unit also comprises a voltage-stabiliser tube, the positive pole of described voltage-stabiliser tube links to each other with the common contact of described the 5th resistance and described the 6th resistance, negative pole links to each other with the common contact of the 3rd resistance and controlled processing unit, and the common contact ground connection of the 5th resistance and the 6th resistance.
4. the high-power power supply management system for lithium battery pack of automobile-used band equilibrium function as claimed in claim 1, it is characterized in that, described balancing unit comprises a NMOSFET power tube and a current-limiting resistance, the grid of this NMOSFET power tube links to each other with described controlled processing unit, source electrode links to each other with the positive pole of battery cell, drain electrode links to each other with an end of described current-limiting resistance, and the other end of this current-limiting resistance links to each other with the negative pole of battery cell.
5. the high-power power supply management system for lithium battery pack of automobile-used band equilibrium function as claimed in claim 1 is characterized in that, each described battery unit is made up of 7-10 battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200708594U CN201426046Y (en) | 2009-04-21 | 2009-04-21 | Power management system for car high power lithium battery stack with balancing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200708594U CN201426046Y (en) | 2009-04-21 | 2009-04-21 | Power management system for car high power lithium battery stack with balancing function |
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| CN201426046Y true CN201426046Y (en) | 2010-03-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976856A (en) * | 2010-06-02 | 2011-02-16 | 张家港思达企业管理有限公司 | Lithium battery starting accumulator for intelligent vehicle |
| CN102590748A (en) * | 2011-01-14 | 2012-07-18 | 北汽福田汽车股份有限公司 | Method and device for detecting balance circuit of power battery |
| CN105480106A (en) * | 2015-11-20 | 2016-04-13 | 浙江超威创元实业有限公司 | Management device and control method of electric automobile lithium battery |
| CN106331600A (en) * | 2015-07-09 | 2017-01-11 | 杭州海康威视数字技术股份有限公司 | Board-inserting type device |
| CN107732985A (en) * | 2016-08-10 | 2018-02-23 | 宁德时代新能源科技股份有限公司 | Distributed battery management system |
-
2009
- 2009-04-21 CN CN2009200708594U patent/CN201426046Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976856A (en) * | 2010-06-02 | 2011-02-16 | 张家港思达企业管理有限公司 | Lithium battery starting accumulator for intelligent vehicle |
| CN102590748A (en) * | 2011-01-14 | 2012-07-18 | 北汽福田汽车股份有限公司 | Method and device for detecting balance circuit of power battery |
| CN106331600A (en) * | 2015-07-09 | 2017-01-11 | 杭州海康威视数字技术股份有限公司 | Board-inserting type device |
| CN106331600B (en) * | 2015-07-09 | 2019-06-18 | 杭州海康威视数字技术股份有限公司 | Board plug type equipment |
| CN105480106A (en) * | 2015-11-20 | 2016-04-13 | 浙江超威创元实业有限公司 | Management device and control method of electric automobile lithium battery |
| CN107732985A (en) * | 2016-08-10 | 2018-02-23 | 宁德时代新能源科技股份有限公司 | Distributed battery management system |
| US10439430B2 (en) | 2016-08-10 | 2019-10-08 | Contemporary Amperex Technology Co., Limited | Distributed battery management system |
| CN107732985B (en) * | 2016-08-10 | 2019-11-29 | 宁德时代新能源科技股份有限公司 | Distributed battery management system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI MICRO-MING NEW ENERGY TECHNOLOGY CO., LTD Free format text: FORMER OWNER: DU FENGLEI Effective date: 20100427 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201100 502, NO.22, LANE 111, LUOYANG ROAD, MINXING DISTRICT, SHANGHAI CITY TO: 201108 NO.4289, JINDOU ROAD, MINXING DISTRICT, SHANGHAI CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100427 Address after: 201108, No. 4289 Jin Du Road, Shanghai, Minhang District Patentee after: Shanghai Xiao Ming Amperex Technology Limited Address before: 201100 Shanghai city Minhang District Luoyang Road 111 Lane 22 No. 502 Patentee before: Du Fenglei |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100317 Termination date: 20130421 |