CN209231486U - High accuracy battery AC internal Resistance detection device - Google Patents
High accuracy battery AC internal Resistance detection device Download PDFInfo
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- CN209231486U CN209231486U CN201821739751.5U CN201821739751U CN209231486U CN 209231486 U CN209231486 U CN 209231486U CN 201821739751 U CN201821739751 U CN 201821739751U CN 209231486 U CN209231486 U CN 209231486U
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Abstract
The utility model 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 utility model 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 utility model relates to battery AC internal Resistance detection fields more particularly to a kind of high accuracy battery AC internal Resistance to detect
Equipment.
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.
Utility model content
The main purpose of the utility model is to provide a kind of high accuracy battery AC internal Resistance detection devices, it is intended to measurement electricity
When the AC internal Resistance of pond, since the induced voltage of voltage detecting line loop leads to not accurately measure battery both end voltage, so that electric
The not high problem of the detection accuracy of pond internal resistance value.
To achieve the above object, the utility model provides a kind of high accuracy battery AC internal Resistance detection device, described high-precision
Degree 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 sampling electricity
Road.
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.
The utility model high accuracy battery AC internal Resistance detection device, it is normal in addition to connecting when measuring battery AC internal Resistance
Except the ampere wires of rule and voltage detecting line, the compensating line with voltage detecting line twisted pair each other also added.And in electricity
Voltage detecting line is reversely superimposed with the voltage in compensating line in pressure sample circuit, so that the induced electricity of compensation line loop
Pressure, cancels out each other with the induced voltage of voltage detecting line loop, to eliminate electromagnetic induction interference caused by detection, improves
The testing result of battery AC internal Resistance.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of the utility model high accuracy battery AC internal Resistance detection device；
The position Fig. 2 the utility model high accuracy battery AC internal Resistance detection device internal circuit configuration schematic diagram.
Drawing reference numeral explanation:
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
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 referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not in the guarantor of the requires of the utility model
Within the scope of shield.
The schematic structural diagram of the first embodiment of the utility model high accuracy battery AC internal Resistance detection device is referring to Fig.1, high
Resolution battery current AC internal Resistance detection device includes detector 1 and detection connecting line 2, and detection connecting line includes voltage detecting line 3, electricity
Conductance line 4 and compensating line 5.Detection circuit is then provided in detector, the primary structure of detection circuit has alternating source 21, voltage
The circuit structures such as sample circuit.Detection connecting line is connect with detection route by port, and there is electric current output in the port of alternating source
Rectify pole 6 and current source output cathode 7, corresponding ampere wires anode 8 and ampere wires cathode 9 with detection connecting line
Connection, there are four ports, respectively battery voltage sampling input anode 10 and cathode 11 altogether for voltage sampling circuit, and mend
Repay 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.
The utility model high accuracy battery AC internal Resistance detection device is provided with compensating line, compensating line in detection connecting line
Effect be measure voltage detecting line generate induced voltage.The material of compensating line and voltage detecting line, shape are all consistent, and mend
Line and voltage detecting line twisted pair each other are repaid, while compensating line is being provided with a short circuit interface 18 close to probe one end, compensates
Line can realize short circuit by being shorted interface, so that compensating line be made to constitute circuit.Because compensating line and voltage detecting line are double each other
Twisted wire, so the measure loop area S that the two surrounds is also approximately uniform.Loop area is approximately uniform, and the material of conducting wire, shape are all
Unanimously, so the induced voltage that the induced voltage that compensation line loop generates is generated with voltage detecting line loop can be considered numerical value phase
Together.
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 utility model by battery AC internal Resistance instrument be arranged induced voltage compensating line, to eliminate voltage detecting line
The adverse effect that the induced voltage generated in magnetic field detects battery AC internal Resistance, so as to effectively improve the exchange of battery
The detection accuracy of internal resistance.Structure is simple simultaneously, without increasing a large amount of hardware cost, therefore lower production costs, operates simultaneously
It is simple and convenient, it solves the problems, such as to be difficult to the AC internal Resistance of precise measurement battery.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
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 |
|---|---|---|---|
| CN201821739751.5U CN209231486U (en) | 2018-10-26 | 2018-10-26 | High accuracy battery AC internal Resistance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821739751.5U CN209231486U (en) | 2018-10-26 | 2018-10-26 | High accuracy battery AC internal Resistance detection device |
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| Publication Number | Publication Date |
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| CN209231486U true CN209231486U (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821739751.5U Active CN209231486U (en) | 2018-10-26 | 2018-10-26 | High accuracy battery AC internal Resistance detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031154A (en) * | 2018-10-26 | 2018-12-18 | 深圳市新威尔电子有限公司 | High accuracy battery AC internal Resistance detection device |
-
2018
- 2018-10-26 CN CN201821739751.5U patent/CN209231486U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031154A (en) * | 2018-10-26 | 2018-12-18 | 深圳市新威尔电子有限公司 | High accuracy battery AC internal Resistance detection device |
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