CN203759127U - Device for measuring single-cell battery internal resistance in equalization processes - Google Patents
Device for measuring single-cell battery internal resistance in equalization processes Download PDFInfo
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- CN203759127U CN203759127U CN201420080979.3U CN201420080979U CN203759127U CN 203759127 U CN203759127 U CN 203759127U CN 201420080979 U CN201420080979 U CN 201420080979U CN 203759127 U CN203759127 U CN 203759127U
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- internal resistance
- power supply
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title abstract description 5
- 238000005259 measurement Methods 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 17
- 238000003491 array Methods 0.000 claims description 12
- 239000000178 monomer Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 15
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 15
- 238000013461 design Methods 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003862 health status Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model relates to a device for measuring single-cell battery internal resistance in equalization processes and belongs to the technical field of lithium ion batteries. According to the device for measuring single-cell battery internal resistance in equalization processes, an equalizing current can be switched through a switch power source and a switch array, excitation is applied to each single cell battery in order, internal resistance is analyzed based on the equalizing current and voltage drop generated on the internal resistance by the equalizing current, and the internal resistance of each single-cell battery can be calculated when a battery group is in dynamic and static states. The internal resistance of each single-cell battery in the battery group can be measured accurately in a real-time and on-line manner. The device for measuring single-cell battery internal resistance in equalization processes is ingenious in design, simple, practical, and high in cost performance; a single-cell battery internal resistance measuring function and a battery active equalization function can be realized at the same time; each battery can be improved in utilization safety and reliability.
Description
Technical field
The utility model relates to the internal resistance of single cell measurement mechanism in a kind of balancing procedure, belongs to technical field of lithium ion.
Background technology
The health status of lithium ion battery and the performance of lithium ion battery are closely related, and the internal resistance of lithium ion battery is a key index that characterizes health status, by measuring lithium ion battery internal resistance, can assess, predict battery performance, promote the reliability of control strategy.Due to the vital role of the internal resistance of cell, for the internal resistance measurement of lithium ion battery, carried out large quantity research in the industry.
At present, internal resistance measurement method is divided into the modes such as DC-method and AC method.AC measurment method adaptive surface is wider, but the result of measuring and the wave mode of signal used, and with frequency and be that strength of current is relevant, measurement result differs greatly.DC-method is to battery access fixed equipment and carries out discharging and recharging of larger electric current, to measure the voltage drop of power-off front and back and to calculate the internal resistance of cell.No matter be that AC method or DC-method all need professional equipment, can not realize the real-time online measuring to all internal resistance of single cell.
Utility model content
The purpose of this utility model is to provide the internal resistance of single cell measurement mechanism in a kind of balancing procedure, a difficult problem of accurately measuring in real time to solve lithium-ion battery monomer internal resistance.
The utility model provides internal resistance of single cell measurement mechanism in a kind of balancing procedure for solving the problems of the technologies described above, this measurement mechanism comprises battery equalizing circuit and voltage acquisition unit, described equalizing circuit comprises Switching Power Supply and switch arrays, the corresponding both positive and negative polarity that connects mesuring battary group of Switching Power Supply the first direct current terminals, the first direct current terminals of the corresponding connecting valve array module of Switching Power Supply the second direct current terminals, the corresponding both positive and negative polarity that connects every cell of mesuring battary group of the second direct current terminals of switch arrays module, described voltage acquisition unit is for being connected with each cell of mesuring battary group, to gather the voltage of each cell.
Described measurement mechanism also comprises MCU unit, described MCU unit and voltage acquisition unit communication connection, and the monomer battery voltage of opening front and back for collect Switching Power Supply according to voltage acquisition unit calculates internal resistance of single cell.
The control end that enables of described Switching Power Supply is connected with MCU unit with direction control end.
The electric current that the second direct current terminals of described Switching Power Supply are flowed through is steady state value.
Described switch arrays are serially connected between Switching Power Supply and electric battery, realize successively the separate connection of interior each cell of electric battery and Switching Power Supply.
The beneficial effects of the utility model are: the utility model is realized the switching of euqalizing current by Switching Power Supply and switch arrays, successively each cell is applied to excitation, the pressure drop producing in internal resistance based on euqalizing current and euqalizing current parses internal resistance, can be in electric battery dynamic and calculate internal resistance of single cell static in the situation that, realize in real time, online, accurately measure the object of each internal resistance of single cell in electric battery, and the utility model design is ingenious, simple and practical, cost performance is high, can realize internal resistance of single cell measures and two kinds of functions of battery active equalization simultaneously, promote the safety and reliability that battery is used.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of internal resistance of single cell measurement mechanism in the utility model balancing procedure;
Fig. 2 is the utility model electric battery lithium ion battery internal resistance instrumentation plan when cell is charged;
Fig. 3 is the utility model cell lithium ion battery internal resistance instrumentation plan during to battery power discharge.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
The embodiment of internal resistance of single cell measurement mechanism in a kind of balancing procedure of the present utility model
As shown in Figure 1, the electric battery of the present embodiment is in series by 12 lithium ion single batteries, in balancing procedure of the present utility model, internal resistance of single cell measurement mechanism comprises equalizing circuit, voltage acquisition chip and MCU, equalizing circuit comprises Switching Power Supply and switch arrays, Switching Power Supply the first direct current terminals (Va+, Va-) connect respectively the both positive and negative polarity (V+ of electric battery, V-), Switching Power Supply the second direct current terminals (Vb+, Vb-) the first direct current terminals (Vc+ of difference connecting valve array module, Vc-), the corresponding both positive and negative polarity that connects every cell of electric battery of the second direct current terminals of switch arrays module, the collection terminal of voltage acquisition chip is connected respectively to the two ends of each cell in electric battery, for gathering the voltage at each cell two ends, the output terminal of voltage acquisition chip is connected with MCU unit, MCU opens front and back monomer battery voltage for collect Switching Power Supply according to voltage acquisition unit calculates internal resistance of single cell, the MCU that also can not adopt here, by artificial calculating, also can realize, the electric current that wherein the second direct current terminals of Switching Power Supply are flowed through is steady state value, switch arrays can be realized the separate connection of interior each cell of electric battery and Switching Power Supply successively.The measuring process of this device is as follows:
Electric battery is measured internal resistance of single cell when cell charges, and by switch arrays, selects cell Cell10, and the voltage that MCU records the front Cell10 of Switching Power Supply unlatching is V10, and it is high level that DIR is set, and enables EN; Now electric battery is to cell Cell10 charging, and the voltage that records the rear Cell10 of Switching Power Supply unlatching is V10
in, the electric current I of the Switching Power Supply of flowing through the second terminals
bfor setting value, as shown in Figure 2, internal resistance r
1=(V10
in-V10)/(β * I
b), wherein β is electric current modifying factor, affected by battery voltage, monomer voltage and switch power efficiency.
Cell is measured internal resistance of single cell during to battery power discharge, by switch arrays, selects cell Cell10.The voltage that MCU records the front Cell10 of Switching Power Supply unlatching is V10, and it is low level that DIR is set, and enables EN; Now cell Cell10 is to battery power discharge, and the voltage that records the rear Cell10 of Switching Power Supply unlatching is V10
in, the electric current I of the Switching Power Supply of flowing through the second terminals
bfor setting value, as shown in Figure 3.Internal resistance r
1=(v10-v10
in)/(β * I
b), wherein β is electric current modifying factor, affected by battery voltage, monomer voltage and switch power efficiency.
Lithium ion battery internal resistance measurement mechanism independence of the present utility model is strong, does not rely on the external working condition of lithium ion battery group, and being no matter all can be in real time in batteries charging, electric discharge or standing situation, the internal resistance of each cell of on-line measurement.By this device, the internal resistance that not only can measure in real time monomer lithium ion battery, can also realize the two-way active equalization between cell and electric battery, promotes electric quantity of lithium ion batteries consistance, at one stroke two obtaining.
Claims (5)
1. the internal resistance of single cell measurement mechanism in a balancing procedure, it is characterized in that, this measurement mechanism comprises battery equalizing circuit and voltage acquisition unit, described equalizing circuit comprises Switching Power Supply and switch arrays, the corresponding both positive and negative polarity that connects mesuring battary group of Switching Power Supply the first direct current terminals, the first direct current terminals of the corresponding connecting valve array module of Switching Power Supply the second direct current terminals, the corresponding both positive and negative polarity that connects every cell of mesuring battary group of the second direct current terminals of switch arrays module, described voltage acquisition unit is for being connected with each cell of mesuring battary group, to gather the voltage of each cell.
2. the internal resistance of single cell measurement mechanism in balancing procedure according to claim 1, it is characterized in that, described measurement mechanism also comprises MCU unit, described MCU unit and voltage acquisition unit communication connection, the monomer battery voltage of opening front and back for collect Switching Power Supply according to voltage acquisition unit calculates internal resistance of single cell.
3. the internal resistance of single cell measurement mechanism in balancing procedure according to claim 2, is characterized in that, the control end that enables of described Switching Power Supply is connected with MCU unit with direction control end.
4. the internal resistance of single cell measurement mechanism in balancing procedure according to claim 1 and 2, is characterized in that, the electric current that the second direct current terminals of described Switching Power Supply are flowed through is steady state value.
5. the internal resistance of single cell measurement mechanism in balancing procedure according to claim 1 and 2, is characterized in that, described switch arrays are serially connected between Switching Power Supply and electric battery, realizes successively the separate connection of interior each cell of electric battery and Switching Power Supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080979.3U CN203759127U (en) | 2014-02-25 | 2014-02-25 | Device for measuring single-cell battery internal resistance in equalization processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080979.3U CN203759127U (en) | 2014-02-25 | 2014-02-25 | Device for measuring single-cell battery internal resistance in equalization processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203759127U true CN203759127U (en) | 2014-08-06 |
Family
ID=51254383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420080979.3U Expired - Lifetime CN203759127U (en) | 2014-02-25 | 2014-02-25 | Device for measuring single-cell battery internal resistance in equalization processes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823118A (en) * | 2014-02-25 | 2014-05-28 | 中航锂电（洛阳）有限公司 | Device and method for measuring internal resistance of battery cells during equalization |
| CN105446208A (en) * | 2014-10-17 | 2016-03-30 | 万向A一二三系统有限公司 | Switch array circuit capable of being connected with cells at different positions in switching manner |
| CN106199431A (en) * | 2014-12-18 | 2016-12-07 | 神华集团有限责任公司 | A kind of exchange monitoring method based on battery electron module and system |
| CN114301138A (en) * | 2021-12-31 | 2022-04-08 | 国网北京市电力公司 | Battery charging multi-pulse width modulation control method and system |
-
2014
- 2014-02-25 CN CN201420080979.3U patent/CN203759127U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823118A (en) * | 2014-02-25 | 2014-05-28 | 中航锂电（洛阳）有限公司 | Device and method for measuring internal resistance of battery cells during equalization |
| CN105446208A (en) * | 2014-10-17 | 2016-03-30 | 万向A一二三系统有限公司 | Switch array circuit capable of being connected with cells at different positions in switching manner |
| CN105446208B (en) * | 2014-10-17 | 2018-01-19 | 万向一二三股份公司 | The switch arrays circuit of changeable access diverse location battery |
| CN106199431A (en) * | 2014-12-18 | 2016-12-07 | 神华集团有限责任公司 | A kind of exchange monitoring method based on battery electron module and system |
| CN106199431B (en) * | 2014-12-18 | 2018-12-28 | 神华集团有限责任公司 | A kind of exchange monitoring method and system based on battery electron module |
| CN114301138A (en) * | 2021-12-31 | 2022-04-08 | 国网北京市电力公司 | Battery charging multi-pulse width modulation control method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220110 Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |
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| CX01 | Expiry of patent term |