CN109031154A - High accuracy battery AC internal Resistance detection device - Google Patents
High accuracy battery AC internal Resistance detection device Download PDFInfo
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- CN109031154A CN109031154A CN201811253954.8A CN201811253954A CN109031154A CN 109031154 A CN109031154 A CN 109031154A CN 201811253954 A CN201811253954 A CN 201811253954A CN 109031154 A CN109031154 A CN 109031154A
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- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 239000000523 sample Substances 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
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Abstract
The invention discloses a kind of high accuracy battery AC internal Resistance detection device, the high accuracy battery AC internal Resistance detection device includes voltage sampling circuit and detection connecting line；The detection connecting line includes voltage detecting line and compensating line；The voltage sampling circuit includes superimposed signal circuit, battery voltage sampling circuit and offset voltage sample circuit.The present invention is provided with the compensating line with voltage detecting line twisted pair each other, pass through the induced voltage of detection compensation line loop, brought interference is detected to eliminate the induced voltage in voltage detecting line to battery AC internal Resistance, to increase the detection accuracy of battery AC internal Resistance.
Description
Technical field
The present invention relates to battery AC internal Resistance detection fields more particularly to a kind of detection of high accuracy battery AC internal Resistance to set
It is standby.
Background technique
With the development of battery technology, the performance of battery is also stronger and stronger.The internal resistance or impedance of battery are a shadows
The important parameter of battery performance is rung, internal resistance method in side used at present is mainly four-wire method.But electricity is being measured using four-wire method
When the internal resistance of pond, since measure loop will form certain area, alternating magnetic field can be generated when ampere wires are connected with alternating current, is led
The magnetic flux sent a telegraph in pressure detection line loop also changes therewith, to generate induced voltage, therefore surveyed voltage is actually
It is the sum of the induced voltage in battery both end voltage and voltage detecting line, the testing result of the internal resistance of cell is caused to there is certain miss
Difference.
Since in actual use, the area of voltage detecting line loop is random, so cannot pass through the side of software calibration
Method eliminates error, and the frequency of induced voltage is consistent with electric current source frequency, also can not filter out interference voltage by frequency-selective filtering.
Simultaneously as the numerical value of the internal resistance of cell is very small, therefore the interference of induced voltage will lead to testing result and large error occurs, because
How this eliminates or reduces the problem of interference of induced voltage bring becomes urgent need to resolve.
Summary of the invention
The main purpose of the present invention is to provide a kind of high accuracy battery AC internal Resistance detection devices, it is intended to measure battery friendship
When flowing internal resistance, since the induced voltage of voltage detecting line loop leads to not accurately measure battery both end voltage, so that in battery
The not high problem of the detection accuracy of resistance value.
To achieve the above object, the present invention provides a kind of high accuracy battery AC internal Resistance detection device, the high precision electro
Pond AC internal Resistance detection device includes voltage sampling circuit and detection connecting line；The detection connecting line include voltage detecting line with
Compensating line；The voltage sampling circuit includes superimposed signal circuit, battery voltage sampling circuit and offset voltage sample circuit.
Optionally, the voltage detecting line and the compensating line twisted pair each other.
Optionally, described detection connecting line one end connecting detection probe, the other end are connect with detection circuit, the compensating line
Probe one end is provided with telescopic short circuit interface.
Optionally, the battery voltage sampling circuit is linked into signal after being reversely superimposed with offset voltage sample circuit jointly
Supercircuit.
High accuracy battery AC internal Resistance detection device of the present invention, when measuring battery AC internal Resistance, in addition to connection routine
Except ampere wires and voltage detecting line, the compensating line with voltage detecting line twisted pair each other also added.And it is adopted in voltage
Voltage detecting line is reversely superimposed with the voltage in compensating line in sample circuit, so that the induced voltage of compensation line loop, with
The induced voltage of voltage detecting line loop is cancelled out each other, to eliminate electromagnetic induction interference caused by detection, improves electricity
The testing result of pond AC internal Resistance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of high accuracy battery AC internal Resistance detection device of the present invention；
The position Fig. 2 high accuracy battery AC internal Resistance detection device internal circuit configuration schematic diagram of the present invention.
Drawing reference numeral explanation:
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
The description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as instruction or
It implies its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result,
Feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can phase
Mutually combine, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occur it is mutual
Contradiction or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection scope it
It is interior.
The schematic structural diagram of the first embodiment of high accuracy battery AC internal Resistance detection device of the present invention referring to Fig.1, high-precision
Battery AC internal Resistance detection device includes detector 1 and detection connecting line 2, and detection connecting line includes that voltage detecting line 3, electric current are led
Line 4 and compensating line 5.Detection circuit is then provided in detector, the primary structure of detection circuit has alternating source 21, voltage sample
The circuit structures such as circuit.Detection connecting line is connect with detection route by port, and there is being current output terminal in the port of alternating source just
Pole 6 and current source output cathode 7, corresponding ampere wires anode 8 and ampere wires cathode 9 with detection connecting line connect
It connects, there are four ports, respectively battery voltage sampling input anode 10 and cathode 11, and compensation altogether for voltage sampling circuit
Voltage sample input anode 12 and cathode 13, the corresponding voltage detecting line anode 14 with detection connecting line, voltage detecting line
Cathode 15, compensating line anode 16 and compensating line cathode 17 connect.
Detection circuit structural schematic diagram referring to Fig. 2, include in circuit structure alternating source 19, current rectifying and wave filtering circuit 20 with
And voltage sampling circuit.Voltage sampling circuit is by battery voltage sampling circuit 21, offset voltage sample circuit 22 and Signal averaging
Circuit 23 forms, and is respectively arranged with battery voltage sampling chip and benefit in battery voltage sampling circuit and offset voltage sample circuit
Repay voltage sample chip.
High accuracy battery AC internal Resistance detection device of the present invention is provided with compensating line, the work of compensating line in detection connecting line
With the induced voltage for being measurement voltage detecting line generation.The material of compensating line and voltage detecting line, shape are all consistent, and compensating line
With voltage detecting line twisted pair each other, while compensating line is being provided with a short circuit interface 18, compensating line energy close to probe one end
It is enough to realize short circuit by being shorted interface, so that compensating line be made to constitute circuit.Because of compensating line and voltage detecting line twisted pair each other,
So the measure loop area S that the two surrounds is also approximately uniform.Loop area is approximately uniform, and material, the shape of conducting wire are all consistent,
So the induced voltage that compensation line loop generates can be considered that numerical value is identical with the induced voltage that voltage detecting line loop generates.
Voltage detecting line is linked into battery voltage sampling circuit, and compensating line is then linked into offset voltage sample circuit, and two
Person accesses superimposed signal circuit after will do it reversed superposition, and the voltage value that offset voltage sample circuit measures is compensation line loop
Induced voltage, can be considered be exactly voltage detecting line induced voltage, what battery voltage sampling circuit measured is the electricity at battery both ends
The sum of the induced voltage of pressure and voltage detecting line loop.Therefore after the two being reversely superimposed, the induced voltage meeting of line loop is compensated
It is offseted with the induced voltage of voltage detecting line loop, finally obtains battery both end voltage value, which can
AC internal Resistance for precise measurement battery.
The present invention by battery AC internal Resistance instrument be arranged induced voltage compensating line, to eliminate voltage detecting line in magnetic
The adverse effect that the induced voltage generated in detects battery AC internal Resistance, so as to effectively improve the AC internal Resistance of battery
Detection accuracy.Structure is simple simultaneously, without increasing a large amount of hardware cost, therefore lower production costs, and meanwhile it is easy to operate
It is convenient, it solves the problems, such as to be difficult to the AC internal Resistance of precise measurement battery.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (4)
1. a kind of high accuracy battery AC internal Resistance detection device, which is characterized in that the high accuracy battery AC internal Resistance detection is set
Standby includes voltage sampling circuit and detection connecting line；The detection connecting line includes voltage detecting line and compensating line；The voltage
Sample circuit includes superimposed signal circuit, battery voltage sampling circuit and offset voltage sample circuit.
2. high accuracy battery AC internal Resistance detection device as described in claim 1, which is characterized in that the voltage detecting line and institute
State compensating line twisted pair each other.
3. high accuracy battery AC internal Resistance detection device as described in claim 1, which is characterized in that described detection connecting line one end
Connecting detection probe, the other end are connect with detection circuit, and the compensating line is provided with telescopic short circuit interface in probe one end.
4. high accuracy battery AC internal Resistance detection device as described in claim 1, which is characterized in that the battery voltage sampling electricity
Road is linked into superimposed signal circuit after being reversely superimposed with offset voltage sample circuit jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253954.8A CN109031154B (en) | 2018-10-26 | 2018-10-26 | High-precision battery alternating-current internal resistance detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253954.8A CN109031154B (en) | 2018-10-26 | 2018-10-26 | High-precision battery alternating-current internal resistance detection equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109031154A true CN109031154A (en) | 2018-12-18 |
| CN109031154B CN109031154B (en) | 2024-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811253954.8A Active CN109031154B (en) | 2018-10-26 | 2018-10-26 | High-precision battery alternating-current internal resistance detection equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346614A (en) * | 2019-08-23 | 2019-10-18 | 深圳市新威尔电子有限公司 | The test fixture of precision resistance is provided |
| CN110471002A (en) * | 2019-08-27 | 2019-11-19 | 深圳市新威尔电子有限公司 | Improve the method and high-precision internal resistance detection equipment of internal resistance instrument precision |
| CN110837048A (en) * | 2019-10-30 | 2020-02-25 | 深圳市新威尔电子有限公司 | Battery detection system based on virtual machine and working method thereof |
| CN111044925A (en) * | 2019-12-20 | 2020-04-21 | 深圳市新威尔电子有限公司 | Simulator for battery detection system |
| CN116381529A (en) * | 2023-06-05 | 2023-07-04 | 宁德时代新能源科技股份有限公司 | Battery testing device, testing method and battery testing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110471002A (en) * | 2019-08-27 | 2019-11-19 | 深圳市新威尔电子有限公司 | Improve the method and high-precision internal resistance detection equipment of internal resistance instrument precision |
| CN110837048A (en) * | 2019-10-30 | 2020-02-25 | 深圳市新威尔电子有限公司 | Battery detection system based on virtual machine and working method thereof |
| CN111044925A (en) * | 2019-12-20 | 2020-04-21 | 深圳市新威尔电子有限公司 | Simulator for battery detection system |
| CN116381529A (en) * | 2023-06-05 | 2023-07-04 | 宁德时代新能源科技股份有限公司 | Battery testing device, testing method and battery testing equipment |
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| CN109031154B (en) | 2024-08-20 |
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