CN205091395U - Internal resistance of cell's device is measured to loss -of -charge method - Google Patents
Internal resistance of cell's device is measured to loss -of -charge method Download PDFInfo
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- CN205091395U CN205091395U CN201520907603.XU CN201520907603U CN205091395U CN 205091395 U CN205091395 U CN 205091395U CN 201520907603 U CN201520907603 U CN 201520907603U CN 205091395 U CN205091395 U CN 205091395U
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- 238000000034 method Methods 0.000 title abstract description 3
- 238000005259 measurement Methods 0.000 claims abstract description 41
- 238000012546 transfer Methods 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides an internal resistance of cell's device is measured to loss -of -charge method, its structure includes: a plurality of measurement terminal, a plurality of transfer relay that discharges, big current discharge resistance rm, little current discharge resistance rs, current sensor and voltage sensor, big current discharge resistance rm is parallelly connected with little current discharge resistance rs again after establishing ties with the transfer relay km contact of discharging to relay contact points connection second-the 5th measurement terminal is switched respectively to the one end that allies oneself with the circuit through discharging, the parallel circuit other end switches relay contact points through discharging respectively connects first-fourth measurement terminal. Use current sensor to sample to discharge current, voltage sensor measures the battery terminal voltage. The utility model has the advantages that: 1 big current discharge resistance of per 8 economize on electricity ponds sharings, per 2 sections A series of cells discharge, the one time has been reduced to the quantity of transfer relay, very big reduction system's cost. Use one big one two kind little discharge current's mode, improved detection precision and suitability greatly.
Description
Technical field
The utility model relates to a kind of electric discharge and measures internal resistance of cell mode, belongs to electric and electronic technical field.
Background technology
Existing electric discharge measures the internal resistance of cell, uses each batteries to connect the mode of a discharge resistance, and by Control during measurement, impulse discharge is carried out at the two ends of discharge resistance directly being received battery.This mode often measures a batteries all needs a discharge resistance and a relay.Detect the internal resistance of electric operation power electric battery in this way, the discharge resistance just needing usage quantity huge and relay, cost is very high.And the mode of this impulse discharge is easily subject to the impact of charging voltage and charging and discharging currents, testing result is not accurate enough.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, provides a kind of device detecting the internal resistance of cell, reduces installation cost, improves internal resistance of cell accuracy of detection.
According to the technical scheme that the utility model provides, the apparatus structure that described electric discharge measures the internal resistance of cell comprises: measurement terminal, electric discharge transfer relay, heavy-current discharge resistance Rm, low discharging current resistance Rs, current sensor and voltage sensor, described heavy-current discharge resistance Rm forms parallel circuit with in parallel with low discharging current resistance Rs again after electric discharge transfer relay Km contact series, one end of described parallel circuit connects the second measurement terminal respectively by electric discharge transfer relay K2 contact, the 3rd measurement terminal is connected by electric discharge transfer relay K4 contact, the 4th measurement terminal is connected by electric discharge transfer relay K6 contact, the 5th measurement terminal is connected by electric discharge transfer relay K8 contact, the described parallel circuit other end connects the first measurement terminal respectively by electric discharge transfer relay K1 contact, the second measurement terminal is connected by electric discharge transfer relay K3 contact, connect the 3rd measurement terminal by electric discharge transfer relay K5 contact, connect the 4th measurement terminal by electric discharge transfer relay K7 contact, current sensor is serially connected on the branch road of heavy-current discharge resistance Rm, low discharging current resistance Rs respectively, and sample to discharge current, voltage sensor connects each measurement terminal, measures battery terminal voltage.
Described first, second, third, fourth, the 5th measurement terminal is arranged in order, the two ends of the series battery that 8 batteries are formed and wherein every two joint connections measurement terminal.
The utility model has the advantages that:
1, every 8 batteries share 1 heavy-current discharge resistance, every 2 batteries discharged in series, and the reduced number of transfer relay one times, greatly reduces system cost.
2, use the mode of small one and large one two kinds of discharge currents, substantially increase accuracy of detection and applicability.
Accompanying drawing explanation
Fig. 1 is metering circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, K1 ~ K8, Km are electric discharge transfer relay, and Rm is heavy-current discharge resistance, and Rs is low discharging current resistance, system uses current sensor to sample to discharge current, and current sensor is serially connected on the branch road of heavy-current discharge resistance Rm, low discharging current resistance Rs respectively.Use voltage sensor to measure battery terminal voltage, voltage sensor connects each measurement terminal.
Heavy-current discharge resistance Rm forms parallel circuit with in parallel with low discharging current resistance Rs again after electric discharge transfer relay Km contact series, one end of described parallel circuit connects the second measurement terminal B respectively by electric discharge transfer relay K2 contact, the 3rd measurement terminal C is connected by electric discharge transfer relay K4 contact, connect the 4th measurement terminal D by electric discharge transfer relay K6 contact, connect the 5th measurement terminal E by electric discharge transfer relay K8 contact; The described parallel circuit other end connects the first measurement terminal A respectively by electric discharge transfer relay K1 contact, the second measurement terminal B is connected by electric discharge transfer relay K3 contact, connect the 3rd measurement terminal C by electric discharge transfer relay K5 contact, connect the 4th measurement terminal D by electric discharge transfer relay K7 contact.
Measuring method is as follows:
1, when measurement the 1st, 2 batteries internal resistance, closing relay K1 and K2, other relay remains open state, and the positive pole of Section 2 battery and the negative pole of Section 1 battery access discharge resistance Rs through measurement terminal A, B and carry out low discharging current;
2, discharge current and battery terminal voltage is measured;
3, closing relay Km, accesses heavy-current discharge resistance Rm, carries out heavy-current discharge to 2 batteries;
4, again discharge current and battery terminal voltage is measured;
5, disconnect relay K 1, K2, Km, calculate internal resistance value, then carry out next Battery pack internal resistance measurement.
The utility model uses 8 batteries to share the mode of one group of discharge resistance, switches different discharge loops by controlling each relay, and switching at runtime discharge resistance; Every 2 batteries strings discharge together, decrease the quantity of transfer relay; Use large and small two discharge resistances electric discharge, by small one and large one two discharge currents obtained, make internal resistance measurement evade the impact of busbar charging voltage, battery charging and discharging electric current, greatly improve accuracy of detection and applicability.
The utility model is the online direct supply ripple of national grid exploitation and an ingredient of accumulator internal resistance monitoring system, detects for the internal resistance of cell wherein.
Claims (2)
1. electric discharge measures the device of the internal resistance of cell, it is characterized in that, comprise: measurement terminal, electric discharge transfer relay, heavy-current discharge resistance Rm, low discharging current resistance Rs, current sensor and voltage sensor, described heavy-current discharge resistance Rm forms parallel circuit with in parallel with low discharging current resistance Rs again after electric discharge transfer relay Km contact series, one end of described parallel circuit connects the second measurement terminal respectively by electric discharge transfer relay K2 contact, the 3rd measurement terminal is connected by electric discharge transfer relay K4 contact, the 4th measurement terminal is connected by electric discharge transfer relay K6 contact, the 5th measurement terminal is connected by electric discharge transfer relay K8 contact, the described parallel circuit other end connects the first measurement terminal respectively by electric discharge transfer relay K1 contact, the second measurement terminal is connected by electric discharge transfer relay K3 contact, connect the 3rd measurement terminal by electric discharge transfer relay K5 contact, connect the 4th measurement terminal by electric discharge transfer relay K7 contact, current sensor is serially connected on the branch road of heavy-current discharge resistance Rm, low discharging current resistance Rs respectively, and sample to discharge current, voltage sensor connects each measurement terminal, measures battery terminal voltage.
2. electric discharge measures the device of the internal resistance of cell as claimed in claim 1, it is characterized in that, described first, second, third, fourth, the 5th measurement terminal is arranged in order, the two ends of the series battery that 8 batteries are formed and wherein every two joint connections measurement terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520907603.XU CN205091395U (en) | 2015-11-13 | 2015-11-13 | Internal resistance of cell's device is measured to loss -of -charge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520907603.XU CN205091395U (en) | 2015-11-13 | 2015-11-13 | Internal resistance of cell's device is measured to loss -of -charge method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205091395U true CN205091395U (en) | 2016-03-16 |
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| CN201520907603.XU Active CN205091395U (en) | 2015-11-13 | 2015-11-13 | Internal resistance of cell's device is measured to loss -of -charge method |
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| CN (1) | CN205091395U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451645A (en) * | 2016-11-07 | 2017-02-22 | 昆明理工大学 | Series-parallel connection converter |
| CN111781522A (en) * | 2020-07-13 | 2020-10-16 | 深圳市道通科技股份有限公司 | Storage battery detection method, equipment and storage medium |
| CN117269804A (en) * | 2023-11-21 | 2023-12-22 | 江苏林洋亿纬储能科技有限公司 | Device and method for detecting resistance of battery module of electric energy storage system |
-
2015
- 2015-11-13 CN CN201520907603.XU patent/CN205091395U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451645A (en) * | 2016-11-07 | 2017-02-22 | 昆明理工大学 | Series-parallel connection converter |
| CN111781522A (en) * | 2020-07-13 | 2020-10-16 | 深圳市道通科技股份有限公司 | Storage battery detection method, equipment and storage medium |
| CN117269804A (en) * | 2023-11-21 | 2023-12-22 | 江苏林洋亿纬储能科技有限公司 | Device and method for detecting resistance of battery module of electric energy storage system |
| CN117269804B (en) * | 2023-11-21 | 2024-03-15 | 江苏林洋亿纬储能科技有限公司 | Device and method for detecting resistance of battery module of electric energy storage system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tang Lijun Inventor after: Lu Shengrong Inventor after: Ning Yongkai Inventor after: Li Dong Inventor after: Qin Yi Inventor after: Chen Ping Inventor before: Tang Lijun Inventor before: Shen Haiping Inventor before: Ning Yongkai Inventor before: Li Dong Inventor before: Qin Yi Inventor before: Chen Ping |
|
| COR | Change of bibliographic data | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214061 Jiangsu province Binhu District of Wuxi City Liangxi Road No. 12 Patentee after: STATE GRID JIANGSU ELECTRIC POWER COMPANY, WUXI POWER SUPPLY Co. Patentee after: State Grid Corporation of China Address before: 214061 Jiangsu province Binhu District of Wuxi City Liangxi Road No. 12 Patentee before: WUXI POWER SUPPLY COMPANY OF JIANGSU ELECTRIC POWER Co. Patentee before: State Grid Corporation of China |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20160616 Address after: 214061 Jiangsu province Binhu District of Wuxi City Liangxi Road No. 12 Patentee after: STATE GRID JIANGSU ELECTRIC POWER COMPANY, WUXI POWER SUPPLY Co. Patentee after: State Grid Corporation of China Patentee after: Wuxi Xingguang electric power automation equipment Co.,Ltd. Address before: 214061 Jiangsu province Binhu District of Wuxi City Liangxi Road No. 12 Patentee before: STATE GRID JIANGSU ELECTRIC POWER COMPANY, WUXI POWER SUPPLY Co. Patentee before: State Grid Corporation of China |