CN103823116A - Self-checking type precision battery internal resistance instrument - Google Patents
Self-checking type precision battery internal resistance instrument Download PDFInfo
- Publication number
- CN103823116A CN103823116A CN201210463590.2A CN201210463590A CN103823116A CN 103823116 A CN103823116 A CN 103823116A CN 201210463590 A CN201210463590 A CN 201210463590A CN 103823116 A CN103823116 A CN 103823116A
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- China
- Prior art keywords
- value comparison
- automatic switch
- comparison resistance
- resistance
- battery
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Abstract
The invention relates to a self-checking type precision battery internal resistance instrument. The self-checking type precision battery internal resistance instrument comprises a DC source VCC (1), an AC constant current source (2), a measuring battery, a high-value comparison resistor (4), a low-value comparison resistor (5), a measuring battery automatic switch (6), a high-value comparison resistor automatic switch (7), a low-value comparison resistor automatic switch (8), power ground (9), a difference amplifier (10), an absolute value circuit (11), an analog-to-digital converter (12), a single-chip microcomputer (13) and a display (14).
Description
technical field:
The present invention relates to the accurate internal resistance of cell instrument of a kind of self checking formula, belong to battery measurement field.
background technology:
Current, the internal resistance of cell is measured and conventionally need to be adopted communication method to measure, because components and parts precision consistance is bad, meanwhile, temperature also has some impact to semiconductor work, for eliminating these adverse effects, just need a measuring basis as a reference, can greatly improve measuring accuracy.
summary of the invention:
The present invention relates to the accurate internal resistance of cell instrument of a kind of self checking formula, to realize precision measurement.
For realizing above-mentioned object, the present invention adopts following technical scheme:
The accurate internal resistance of cell instrument of a kind of self checking formula, comprises:
Direct supply VCC (1), AC constant-current source (2), measure battery (3), high value comparison resistance (4), low value comparison resistance (5), measure battery automatic switch (6), high value comparison resistance automatic switch (7), low value comparison resistance automatic switch (8), power supply ground (9), difference amplifier (10), absolute value circuit (11), analog to digital converter (12), single-chip microcomputer (13), display (14); As shown in Figure 1.
Below in conjunction with accompanying drawing, technical construction of the present invention and method are described: direct supply VCC (1) is connected with AC constant-current source (2), AC constant-current source (2) respectively with measure battery (3), high value comparison resistance (4) is connected with low value comparison resistance (5), measuring battery (3) is connected with power supply ground (9) by measuring battery automatic switch (6), high value comparison resistance (4) is connected with power supply ground (9) by high value comparison resistance automatic switch (7), low value comparison resistance (5) is compared resistance automatic switch (8) by low value and is connected with power supply ground (9), (10) input ends in power supply ground (9) and difference amplifier are connected, measure battery (3), the signal end of high value comparison resistance (4) and low value comparison resistance (5) is connected in parallel on another input end of difference amplifier (10), signal is through difference amplifier (10), become after DC voltage through absolute value circuit (11) again, again through analog to digital converter (12), transfer simulating signal to digital signal, sample through single-chip microcomputer (13) again, single-chip microcomputer (13) control survey battery automatic switch (6), the switching of high value comparison resistance automatic switch (7) and low value comparison resistance automatic switch (8), when work, according to need of work, signal is switched, finally internal resistance of cell value is shown to display (14).
Single-chip microcomputer (13) control survey battery automatic switch (6), the switching of high value comparison resistance automatic switch (7) and low value comparison resistance automatic switch (8), when work, according to need of work, signal is switched, note, high value comparison resistance (4) value and low value are compared the desirable 1:100 of resistance (5) ratio, high value comparison resistance (4) is got 100 milliohms, low value comparison resistance (5) is got 1 milliohm, when measurement, high value comparison resistance automatic switch (7) is first closed, at this moment, single-chip microcomputer (13) is obtained the response signal of high value comparison resistance (4), then high value comparison resistance automatic switch (7) is opened, low value comparison resistance automatic switch (8) closure, obtain the response signal of low value comparison resistance (5), afterwards, low value comparison resistance automatic switch (8) is opened, measure battery automatic switch (6) closure, record the response signal of measuring battery (3), by comparison, press signal proportion, obtain measuring the internal resistance of battery (3), its formula is as follows: U1 is the response signal of high value comparison resistance (4), U2 is the response signal of low value comparison resistance (5), U3 is for measuring the response signal of battery (3), R1 is the resistance value of high value comparison resistance (4), R2 is the resistance value of low value comparison resistance (5), Rc is for measuring the internal resistance of battery (3):
Rc=?U3*(R1-R2)/?(U1-U2)；
In above formula: U2<=U3<=U1, the response signal U3 that measures battery (3) should be more than or equal to the response signal U2 of low value comparison resistance (5), be less than or equal to the response signal U1 of high value comparison resistance (4) simultaneously, if U3<U2, or U3>U1, the response signal U3 that measures battery (3) should be less than the response signal U2 of low value comparison resistance (5), or be greater than high value and compare the response signal U1 of resistance (4), show that range exceedes restriction, thereby guarantee the precision needs in measurement range.
Beneficial effect of the present invention: provide measuring basis as a reference for measuring, greatly improved measuring accuracy.
accompanying drawing explanation:
Accompanying drawing 1 is structural representation of the present invention
embodiment:
In order to make technical scheme of the present invention clearer, below in conjunction with drawings and Examples, the present invention is described in more detail, and instantiation described herein only, in order to explain the present invention, is not limited to the present invention.
embodiment:
Refer to shown in accompanying drawing 1, direct supply VCC (1) is connected with AC constant-current source (2), AC constant-current source (2) respectively with measure battery (3), high value comparison resistance (4) is connected with low value comparison resistance (5), measuring battery (3) is connected with power supply ground (9) by measuring battery automatic switch (6), high value comparison resistance (4) is connected with power supply ground (9) by high value comparison resistance automatic switch (7), low value comparison resistance (5) is compared resistance automatic switch (8) by low value and is connected with power supply ground (9), (10) input ends in power supply ground (9) and difference amplifier are connected, measure battery (3), the signal end of high value comparison resistance (4) and low value comparison resistance (5) is connected in parallel on another input end of difference amplifier (10), signal is through difference amplifier (10), become after DC voltage through absolute value circuit (11) again, again through analog to digital converter (12), transfer simulating signal to digital signal, sample through single-chip microcomputer (13) again, single-chip microcomputer (13) control survey battery automatic switch (6), the switching of high value comparison resistance automatic switch (7) and low value comparison resistance automatic switch (8), when work, according to need of work, signal is switched, finally internal resistance of cell value is shown to display (14).
Claims (1)
1. a self checking formula precision internal resistance of cell instrument, comprises: direct supply VCC (1), AC constant-current source (2), measurement battery (3), high value comparison resistance (4), low value comparison resistance (5), measurement battery automatic switch (6), high value comparison resistance automatic switch (7), low value comparison resistance automatic switch (8), power supply ground (9), difference amplifier (10), absolute value circuit (11), analog to digital converter (12), single-chip microcomputer (13), display (14), it is characterized in that: direct supply VCC (1) is connected with AC constant-current source (2), AC constant-current source (2) respectively with measure battery (3), high value comparison resistance (4) is connected with low value comparison resistance (5), measuring battery (3) is connected with power supply ground (9) by measuring battery automatic switch (6), high value comparison resistance (4) is connected with power supply ground (9) by high value comparison resistance automatic switch (7), low value comparison resistance (5) is compared resistance automatic switch (8) by low value and is connected with power supply ground (9), (10) input ends in power supply ground (9) and difference amplifier are connected, measure battery (3), the signal end of high value comparison resistance (4) and low value comparison resistance (5) is connected in parallel on another input end of difference amplifier (10), signal is through difference amplifier (10), become after DC voltage through absolute value circuit (11) again, again through analog to digital converter (12), transfer simulating signal to digital signal, sample through single-chip microcomputer (13) again, single-chip microcomputer (13) control survey battery automatic switch (6), the switching of high value comparison resistance automatic switch (7) and low value comparison resistance automatic switch (8), when work, according to need of work, signal is switched, finally internal resistance of cell value is shown to display (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210463590.2A CN103823116A (en) | 2012-11-18 | 2012-11-18 | Self-checking type precision battery internal resistance instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210463590.2A CN103823116A (en) | 2012-11-18 | 2012-11-18 | Self-checking type precision battery internal resistance instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103823116A true CN103823116A (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210463590.2A Pending CN103823116A (en) | 2012-11-18 | 2012-11-18 | Self-checking type precision battery internal resistance instrument |
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| CN (1) | CN103823116A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556743A (en) * | 2016-10-27 | 2017-04-05 | 北京航天长征飞行器研究所 | A kind of priming system resistance measuring circuit of automatic calibration multichannel priming system circuit |
| CN112485687A (en) * | 2020-10-20 | 2021-03-12 | 浙江南都电源动力股份有限公司 | Internal resistance precision checking method |
| CN117269803A (en) * | 2023-11-21 | 2023-12-22 | 江苏林洋亿纬储能科技有限公司 | Passive measurement system and method for battery cluster resistance detection device of electric energy storage system |
-
2012
- 2012-11-18 CN CN201210463590.2A patent/CN103823116A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556743A (en) * | 2016-10-27 | 2017-04-05 | 北京航天长征飞行器研究所 | A kind of priming system resistance measuring circuit of automatic calibration multichannel priming system circuit |
| CN112485687A (en) * | 2020-10-20 | 2021-03-12 | 浙江南都电源动力股份有限公司 | Internal resistance precision checking method |
| CN117269803A (en) * | 2023-11-21 | 2023-12-22 | 江苏林洋亿纬储能科技有限公司 | Passive measurement system and method for battery cluster resistance detection device of electric energy storage system |
| CN117269803B (en) * | 2023-11-21 | 2024-02-06 | 江苏林洋亿纬储能科技有限公司 | Passive measurement system and method for battery cluster resistance detection system of electric energy storage system |
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Application publication date: 20140528 |