CN205049712U - Synchronous four line method sampling internal resistance of cell device - Google Patents
Synchronous four line method sampling internal resistance of cell device Download PDFInfo
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- CN205049712U CN205049712U CN201520822516.4U CN201520822516U CN205049712U CN 205049712 U CN205049712 U CN 205049712U CN 201520822516 U CN201520822516 U CN 201520822516U CN 205049712 U CN205049712 U CN 205049712U
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- 238000005070 sampling Methods 0.000 title claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000178 monomer Substances 0.000 abstract 1
- 230000003137 locomotive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a synchronous four line method sampling internal resistance of cell device, including central controller CPU, AD converter, multiway switch, sample hold circuit, battery status sensor, the battery status sensor has multiway switch through the CAN line connection, multiway switch is connected with central controller CPU through the AD converter, be equipped with sample hold circuit on the CAN line. The utility model discloses a device simple structure can realize synchronous sampling to the battery monomer of battery, detects real - time voltage, temperature, the internal resistance of every battery to upload to the host computer, sample data is accurate, has reduced sampling time in addition.
Description
Technical field
The utility model relates to a kind of sampling apparatus, specifically a kind of synchronous four-wire method sampling battery internal resistance device.
Background technology
Current use for electric locomotive accumulator adopts valve-control sealed lead acid battery usually.When the insulation distance piece between service area crossed over by power supply network exception or locomotive, powered to consumer by accumulator.Charge in batteries power supply conventional on locomotive, does not generally possess the function of storage battery energy management, and the discharge and recharge when accumulator health status is not clear, easily occurs the situation such as overcharge, overdischarge, cause service lifetime of accumulator to be affected.
The accumulator of current use is the accumulator of 110V, is to be in series by 48 battery cells.In order to gather the information of accumulator, need to realize synchronized sampling to these 48 battery cells, detect the real-time voltage of each battery, temperature, internal resistance, and be uploaded to host computer and complete sampling, because accumulator internal resistance is very little, be generally μ Ω ~ m Ω level, therefore the impedance of slotted line becomes and can not ignore, adopt four-wire method to measure for this reason, drive current loop and induced voltage circuit are separated.
Utility model content
For solving the problem, the utility model provides a kind of structure simple, can carry out the synchronous four-wire method sampling battery internal resistance device of sampling simultaneously.
The technical solution adopted in the utility model is as follows:
A kind of synchronous four-wire method sampling battery internal resistance device, comprise central control unit CPU, A/D converter, multi-way switch, sampling hold circuit, battery condition sensor, described battery condition sensor is connected with multi-way switch by CAN line, described multi-way switch is connected with central control unit CPU by A/D converter, and described CAN line is provided with sampling hold circuit.
The beneficial effects of the utility model are:
Apparatus structure of the present utility model is simple, can realize synchronized sampling, detect the real-time voltage of each battery, temperature, internal resistance, and be uploaded to host computer the battery cell of accumulator, and sampled data is accurate, and decreases the sampling time.
Accompanying drawing explanation
Fig. 1 is the utility model Vehicular accumulator cell digitizing power supply architecture figure;
Fig. 2 is the utility model synchronized sampling schematic diagram;
Fig. 3 is that the utility model four-wire method surveys internal resistance schematic diagram;
Fig. 4 is the i of Fig. 3
sand V
ophase diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the technical solution of the utility model is described further.
As depicted in figs. 1 and 2, one described in the utility model synchronous four-wire method sampling battery internal resistance device, comprise central control unit CPU, A/D converter, multi-way switch, sampling hold circuit, battery condition sensor, described battery condition sensor is provided with 48, each battery condition sensor is connected with multi-way switch by CAN line, described multi-way switch is connected with central control unit CPU by A/D converter, and described CAN line is provided with sampling hold circuit.
This device can realize synchronized sampling to these 48 battery cells, detects the real-time voltage of each battery, temperature, internal resistance, and is uploaded to host computer.Concrete mode is: host computer sends a sampled signal, to certain parameter of 48 battery cells, such as test side voltage.After 48 battery sensors receive sampled signal by CAN, collection terminal voltage simultaneously.These simulating signals obtained, keep through sampling hold circuit, waiting for CPU carries out A/D conversion one by one to each simulating signal.Because accumulator internal resistance is very little, be generally μ Ω ~ m Ω level, therefore the impedance of slotted line becomes and can not ignore, and adopts four-wire method to measure for this reason, is separated in drive current loop and induced voltage circuit.Four-wire method surveys internal resistance principle as Fig. 3, applies a constant AC audio current source i at accumulator two ends
s, then detect battery terminal voltage V
oand i
sand V
obetween angle theta, relation between three, as shown in Figure 4,
According to Ohm law, the impedance of battery:
Consider phase relation, the internal resistance of battery is: R=Zcos θ.
Specific embodiment described herein is only to the utility model explanation for example; the utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, within the protection domain that all should be encompassed in utility model.
Claims (1)
1. a synchronous four-wire method sampling battery internal resistance device, comprise central control unit CPU, A/D converter, multi-way switch, sampling hold circuit, battery condition sensor, it is characterized in that: described battery condition sensor is connected with multi-way switch by CAN line, described multi-way switch is connected with central control unit CPU by A/D converter, and described CAN line is provided with sampling hold circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520822516.4U CN205049712U (en) | 2015-10-21 | 2015-10-21 | Synchronous four line method sampling internal resistance of cell device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520822516.4U CN205049712U (en) | 2015-10-21 | 2015-10-21 | Synchronous four line method sampling internal resistance of cell device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205049712U true CN205049712U (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520822516.4U Expired - Fee Related CN205049712U (en) | 2015-10-21 | 2015-10-21 | Synchronous four line method sampling internal resistance of cell device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205049712U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675996A (en) * | 2016-04-15 | 2016-06-15 | 桂林电子科技大学 | Power cell internal resistance on-line monitoring system and method |
| CN108614218A (en) * | 2018-04-19 | 2018-10-02 | 中国科学院广州能源研究所 | A kind of continuous method for measuring lithium ion battery dynamic internal resistance |
| CN113805091A (en) * | 2020-05-27 | 2021-12-17 | 比亚迪半导体股份有限公司 | Battery pack monitoring device, management system and vehicle |
-
2015
- 2015-10-21 CN CN201520822516.4U patent/CN205049712U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675996A (en) * | 2016-04-15 | 2016-06-15 | 桂林电子科技大学 | Power cell internal resistance on-line monitoring system and method |
| CN105675996B (en) * | 2016-04-15 | 2018-04-17 | 桂林电子科技大学 | A kind of power battery internal resistance on-line monitoring system and method |
| CN108614218A (en) * | 2018-04-19 | 2018-10-02 | 中国科学院广州能源研究所 | A kind of continuous method for measuring lithium ion battery dynamic internal resistance |
| CN113805091A (en) * | 2020-05-27 | 2021-12-17 | 比亚迪半导体股份有限公司 | Battery pack monitoring device, management system and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20201021 |