CN109709488A - Battery core mould group is electrically connected detection method and device - Google Patents
Battery core mould group is electrically connected detection method and device Download PDFInfo
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Abstract
The present invention relates to power battery field, providing a kind of battery core mould group electrical connection detection method and device, the battery core mould group includes more string battery cores, and the battery core mould group electrical connection detection method includes: the quiescent voltage for obtaining every string battery core in more string battery cores；It is discharged respectively with predetermined current every string battery core；, in every string battery core difference discharge process, the discharge voltage of every string battery core is being obtained with predetermined current；The voltage difference of every string battery core is determined according to the discharge voltage of the quiescent voltage of every string battery core and every string battery core；Determine that the average voltage of the multiple battery core is poor according to the voltage difference of every string battery core；According to the average voltage of the multiple battery core, the voltage difference of poor, described every string battery core and consistency threshold value determine the electrical connection quality of the battery core mould group.The present invention can accurately detect battery core module internal electrical connection quality.
Description
Technical field
The present invention relates to power battery technology field, in particular to a kind of battery core mould group electrical connection detection method and device.
Background technique
Aluminium row or copper bar (busbar) overcurrent are mostly used between square electric cell module internal battery core greatly, electrical connection mostly uses sharp
The connection type that photocoagulation or bolt are fixed.Mould group is connected electrically in all multivariables and mistake involved in design technology and equipment debugging
The stability of journey parameter is influenced by battery core surface moisture, cleannes and tooling pressure etc., it cannot be guaranteed that each solder joint 100% welds
Connect good, missing solder is broken etc. when bad mould is assembled into battery pack super-high-current that will cause battery pack on fire, so needing a kind of side
Method judges final quality of connection.Prior art mainly applies the machine vision techniques such as CCD, 3D contourgraph to be detected.
CCD is detected as taking pictures to welding region using CCD, after comparing with pre-set non-defective unit image, detects weld seam table
The defects of face is broken, short of width；3D contourgraph is to scan welding region using 3D contourgraph, is examined by calculating weld excursion
The defects of surveying stomata, burning.Prior art defect is that can only detect face of weld exception, can not for welding internal missing solder
Detection.
Summary of the invention
In view of this, the present invention is directed to propose a kind of battery core mould group is electrically connected detection method, to battery core module internal electricity
Quality of connection is accurately detected.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of battery core mould group electrical connection detection method, the battery core mould group include more string battery cores, and the battery core mould group is electrically connected
Connecing detection method includes: the quiescent voltage for obtaining every string battery core in more string battery cores；With predetermined current to every string electricity
Core discharges respectively；, in every string battery core difference discharge process, the electric discharge electricity of every string battery core is being obtained with predetermined current
Pressure；The voltage of every string battery core is determined according to the discharge voltage of the quiescent voltage of every string battery core and every string battery core
Difference；Determine that the average voltage of the multiple battery core is poor according to the voltage difference of every string battery core；According to the flat of the multiple battery core
Equal voltage difference, the voltage difference of every string battery core and consistency threshold value determine the electrical connection quality of the battery core mould group.
Further, the voltage difference and one of poor, the described every string battery core of the average voltage according to the multiple battery core
Cause property threshold value determine the battery core mould group electrical connection quality include: according to it is described it is every string battery core voltage difference determine it is the multiple
The minimum voltage difference of the maximum voltage difference of battery core in battery core and the battery core in the multiple battery core；According to the multiple battery core
Average voltage is poor, the minimum voltage of the maximum voltage difference of battery core in the multiple battery core and the battery core in the multiple battery core
Difference determines the consistency value of the battery core mould group；Institute is determined according to the consistency value of the battery core mould group and the consistency threshold value
State the electrical connection quality of battery core mould group.
Further, the consistency value of the battery core mould group is calculated by the following formula:
Wherein, D is the consistency value of the battery core mould group, VmaxFor in the multiple battery core
The maximum voltage difference of battery core, VaveAverage voltage for the multiple battery core is poor, VminMost for the battery core in the multiple battery core
Small voltage difference.
Further, the battery core mould group is electrically connected detection method further include: detects the model of the battery core mould group；According to
The model of the battery core mould group determines the predetermined current.
Further, described that the battery core mould is determined according to the consistency value and the consistency threshold value of the battery core mould group
The electrical connection quality of group includes: when the consistency value of the battery core mould group is more than or equal to the consistency threshold value, described in judgement
The electrical connection of battery core mould group occurs abnormal；When the consistency value of the battery core mould group is less than the consistency threshold value, institute is judged
The electrical connection for stating battery core mould group is normal.
Compared with the existing technology, battery core mould group electrical connection detection method of the present invention has the advantage that
Battery core mould group of the present invention is electrically connected detection method, and the battery core mould group includes more string battery cores, passes through detection
It is more with determination according to testing result to the voltage after discharging after the voltage before every string battery core electric discharge in battery core mould group mostly string battery core
The average voltage of a battery core is poor, so that it is determined that the electrical connection quality of battery core mould group.By using the battery core of battery core module internal
Corresponding parameter determines electrical connection quality, and the method different from only can determine that surface electrical connection quality can be to battery core module internal
Electrical connection quality is accurately detected.
Another object of the present invention is to propose a kind of battery core mould group electrical connection detection device, to battery core module internal electricity
Quality of connection is accurately detected.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of battery core mould group electrical connection detection device, the battery core mould group include more string battery cores, and the battery core mould group is electrically connected
Connecing detection device includes: acquiring unit, discharge cell and processing unit, wherein the acquiring unit is described more for obtaining
The quiescent voltage of every string battery core in string battery core；The discharge cell for putting every string battery core with predetermined current respectively
Electricity；The acquiring unit is also used to, in every string battery core difference discharge process, obtaining every string electricity with predetermined current
The discharge voltage of core；The processing unit is used for the electric discharge electricity of quiescent voltage and every string battery core according to every string battery core
Pressure determines the voltage difference of every string battery core；The average voltage of the multiple battery core is determined according to the voltage difference of every string battery core
Difference；And the voltage difference of poor, described every string battery core and consistency threshold value determine institute according to the average voltage of the multiple battery core
State the electrical connection quality of battery core mould group.
Further, the voltage difference and one of poor, the described every string battery core of the average voltage according to the multiple battery core
Cause property threshold value determine the battery core mould group electrical connection quality include: according to it is described it is every string battery core voltage difference determine it is the multiple
The minimum voltage difference of the maximum voltage difference of battery core in battery core and the battery core in the multiple battery core；According to the multiple battery core
Average voltage is poor, the minimum voltage of the maximum voltage difference of battery core in the multiple battery core and the battery core in the multiple battery core
Difference determines the consistency value of the battery core mould group；Institute is determined according to the consistency value of the battery core mould group and the consistency threshold value
State the electrical connection quality of battery core mould group.
Further, the consistency value of the battery core mould group is calculated by the following formula:
Wherein, D is the consistency value of the battery core mould group, VmaxFor in the multiple battery core
The maximum voltage difference of battery core, VaveAverage voltage for the multiple battery core is poor, VminMost for the battery core in the multiple battery core
Small voltage difference.
Further, the battery core mould group is electrically connected detection device further include: detection unit is used for: detecting the battery core
The model of mould group；The processing unit is also used to determine the predetermined current according to the model of the battery core mould group.
Further, described that the battery core mould is determined according to the consistency value and the consistency threshold value of the battery core mould group
The electrical connection quality of group includes: when the consistency value of the battery core mould group is more than or equal to the consistency threshold value, described in judgement
The electrical connection of battery core mould group occurs abnormal；When the consistency value of the battery core mould group is less than the consistency threshold value, institute is judged
The electrical connection for stating battery core mould group is normal.
The battery core mould group electrical connection detection device is electrically connected detection method compared with the existing technology with above-mentioned battery core mould group
Possessed advantage is identical, and details are not described herein.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies mode and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.
In the accompanying drawings:
Fig. 1 is the flow chart for the battery core mould group electrical connection detection method that one embodiment of the invention provides；
Fig. 2 be another embodiment of the present invention provides battery core mould group electrical connection detection method flow chart；
Fig. 3 is the broken line schematic diagram of the voltage difference data for the battery core that one embodiment of the invention provides；
Fig. 4 is the flow chart that the predetermined current that one embodiment of the invention provides determines method；
Fig. 5 is the structural schematic diagram for the predetermined current determining device that one embodiment of the invention provides；And
Fig. 6 be another embodiment of the present invention provides predetermined current determining device structural schematic diagram.
Description of symbols
1 acquiring unit, 2 discharge cell
3 processing unit, 4 detection unit
61 electronic load, 62 sampling probe disk servo press mechanism
63 mould group positioning and clamping mechanism, 64 electrical control cabinet
65 code readers
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can
To be combined with each other.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
Fig. 1 is the flow chart for the battery core mould group electrical connection detection method that one embodiment of the invention provides.As shown in Figure 1, institute
Stating battery core mould group includes more string battery cores, and the battery core mould group electrical connection detection method includes:
Step S11 obtains the quiescent voltage of every string battery core in more string battery cores；
Step S12 discharges respectively to every string battery core with predetermined current；
Step S13, in every string battery core difference discharge process, is obtaining putting for every string battery core with predetermined current
Piezoelectric voltage；
Step S14 is determined described every according to the discharge voltage of the quiescent voltage of every string battery core and every string battery core
The voltage difference of string battery core；
Step S15 determines that the average voltage of the multiple battery core is poor according to the voltage difference of every string battery core；
Step S16, the voltage difference and consistency threshold of poor, described every string battery core according to the average voltage of the multiple battery core
Value determines the electrical connection quality of the battery core mould group.
For the mould group of same batch, internal resistance is opposite with the relationship of electrical connection quality stable, general lithium-ion electric core internal resistance
Between 1.2-1.8m Ω (the practical specification of product of being subject to), if there is missing solder between mould group battery core, which can be more than
1.8m Ω, when with a constant-current discharge, the voltage change of the point can amplify (amplification factor is size of current), consequently facilitating raw
Production scene filters out bad mould group, it is ensured that the connection of shipment mould group is reliable, and defective products is avoided to flow out.
Firstly, connection battery core mould group low-voltage interface, it is assumed that battery core mould group has n string battery core, then acquires battery core mould group m string
The quiescent voltage V of battery core1m, wherein m is the integer in 1~n；
Then, it discharges preset time (such as 12s, the present invention is it is not limited here) to mould group, discharge current can basis
Battery core module group type determination, for example, 200A or 300A；
Then, during discharge (such as when 10s), the discharge voltage V of m-th of battery core of battery core mould group is acquired2m, wherein m
For the integer in 1~n；
Then, it is calculated by the following formula the voltage difference delta V of battery core mould m-th of battery core of groupm:
ΔVm=V2m-V1mFormula (1)
Wherein m is the integer in 1~n；
Then, it is calculated by the following formula the average voltage difference V of the multiple battery cores of battery core mould groupave:
Wherein m is the integer in 1~n；
Finally, the voltage difference and consistency threshold value of poor, the every string battery core of average voltage according to multiple battery cores determine battery core
The electrical connection quality of mould group.
Fig. 2 be another embodiment of the present invention provides battery core mould group electrical connection detection method flow chart.As shown in Fig. 2,
After the average voltage difference for determining multiple battery cores, this method further include:
Step S21 determines the maximum voltage difference of the battery core in the multiple battery core according to the voltage difference of every string battery core
With the minimum voltage difference of the battery core in the multiple battery core；
Step S22, the maximum voltage difference of the battery core according to the average voltage of the multiple battery core in poor, the multiple battery core
And the minimum voltage difference of the battery core in the multiple battery core determines the consistency value of the battery core mould group；
Step S23, judges whether the consistency value of the battery core mould group is more than or equal to consistency threshold value；
Step S24, when whether the consistency value of the battery core mould group is more than or equal to the consistency threshold value, described in judgement
The electrical connection of battery core mould group occurs abnormal；
Step S25 judges the battery core mould group when the consistency value of the battery core mould group is less than the consistency threshold value
Electrical connection it is normal.
Firstly, determining the minimum voltage difference V of the battery core in the multiple battery cores of battery core mould groupminWith maximum voltage difference Vmax；
Then, it is calculated by the following formula the consistency value D of battery core mould group:
Wherein, D is the consistency value of the battery core mould group, VmaxFor the maximum voltage difference of the battery core in the multiple battery core,
VaveAverage voltage for the multiple battery core is poor, VminFor the minimum voltage difference of the battery core in the multiple battery core；
Finally, the electrical connection quality of battery core mould group is determined according to the consistency value of battery core mould group and consistency threshold value, wherein
Consistency threshold value is defined according to battery core internal resistance variation range, generally can be set as 2.Be greater than in the consistency value of battery core mould group etc.
When consistency threshold value, it is abnormal to judge that the electrical connection of battery core mould group occurs；It is less than consistency threshold in the consistency value of battery core mould group
When value, judge that the electrical connection of battery core mould group is normal.
Example exemplified below is illustrated:
The voltage difference data of each battery core when certain 12 string battery core mould group 200A electric discharge is shown in table 1:
Table 1
| cell | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| ΔV | 0.155 | 0.153 | 0.158 | 0.156 | 0.157 | 0.162 | 0.158 | 0.157 | 0.159 | 0.155 | 0.193 | 0.16 |
The broken line schematic diagram of the voltage difference data of above-mentioned battery core is as shown in figure 3, according to formula (2), VaveIt is following to calculate:
(0.155+0.153+0.158+0.156+0.157+0.162+0.158+0.157+0.159+0.155+0.173+
0.16)/12=0.16；
Take the maximum value of 12 points, Vmax=0.193；
Take the minimum value of 12 points, Vmin=0.153；
According to formula (3), D=(0.193-0.16)/(0.16-0.153)=4.52；
Because of D > 2, then it is abnormal to judge that the electrical connection of battery core mould group occurs.
By the above method, the battery core consistency of battery core mould group can be detected automatically, saves and purchases charging/discharging apparatus expense,
The electrical connection quality of battery core mould group can be further judged according to the battery core consistency of battery core mould group.
Fig. 4 is the flow chart that the predetermined current that one embodiment of the invention provides determines method.As shown in figure 4, this method packet
It includes:
Step S41 detects the model of the battery core mould group；
Step S42 determines the predetermined current according to the model of the battery core mould group.
Barcode scanning is carried out by detecting the model of battery core mould group, such as to battery core mould group, it can be according to the model of battery core mould group
The size of predetermined current is determined, targetedly to discharge battery core mould group.
Fig. 5 is the structural schematic diagram for the predetermined current determining device that one embodiment of the invention provides.As shown in figure 5, described
Battery core mould group includes more string battery cores, and the battery core mould group electrical connection detection device includes: acquiring unit 1, discharge cell 2 and place
Manage unit 3, wherein the acquiring unit 1 is used to obtain the quiescent voltage of every string battery core in more string battery cores；The electric discharge
Unit 2 is for discharging respectively to every string battery core with predetermined current；The acquiring unit 1 be also used to predetermined current to institute
It states in every string battery core difference discharge process, obtains the discharge voltage of every string battery core；The processing unit 3 is used for according to
The quiescent voltage of every string battery core and the discharge voltage of every string battery core determine the voltage difference of every string battery core；According to described every
The voltage difference of string battery core determines that the average voltage of the multiple battery core is poor；And poor according to the average voltage of the multiple battery core,
The voltage difference and consistency threshold value of every string battery core determine the electrical connection quality of the battery core mould group.
Further, the voltage difference and one of poor, the described every string battery core of the average voltage according to the multiple battery core
Cause property threshold value determine the battery core mould group electrical connection quality include: according to it is described it is every string battery core voltage difference determine it is the multiple
The minimum voltage difference of the maximum voltage difference of battery core in battery core and the battery core in the multiple battery core；According to the multiple battery core
Average voltage is poor, the minimum voltage of the maximum voltage difference of battery core in the multiple battery core and the battery core in the multiple battery core
Difference determines the consistency value of the battery core mould group；Institute is determined according to the consistency value of the battery core mould group and the consistency threshold value
State the electrical connection quality of battery core mould group.
Further, the consistency value of the battery core mould group is calculated by the following formula:
Wherein, D is the consistency value of the battery core mould group, VmaxFor in the multiple battery core
Battery core maximum voltage difference, VaveAverage voltage for the multiple battery core is poor, VminFor the battery core in the multiple battery core
Minimum voltage difference.
Further, the battery core mould group is electrically connected detection device further include: detection unit 4 is used for: detecting the battery core
The model of mould group；The processing unit 2 is also used to determine the predetermined current according to the model of the battery core mould group.
Further, described that the battery core mould is determined according to the consistency value and the consistency threshold value of the battery core mould group
The electrical connection quality of group includes: when the consistency value of the battery core mould group is more than or equal to the consistency threshold value, described in judgement
The electrical connection of battery core mould group occurs abnormal；When the consistency value of the battery core mould group is less than the consistency threshold value, institute is judged
The electrical connection for stating battery core mould group is normal.
Battery core mould group electrical connection detection device and battery core mould group electrical connection detection method described above described above
Embodiment is similar, and details are not described herein.
Fig. 6 be another embodiment of the present invention provides predetermined current determining device structural schematic diagram.As shown in fig. 6, should
Device includes:
Electronic load 61 provides test electric current for discharging to battery core mould group；
Sampling probe disk servo press mechanism 62, for sampling the battery core voltage of battery core mould group；
Mould group positioning and clamping mechanism 63, for fixing battery core mould group；
Electrical control cabinet 64 is transported for controlling sampling probe disk servo press mechanism 62 and mould group positioning and clamping mechanism 63
It is dynamic, analog quantity, which is converted, by probe sampling voltage physical amount is transferred to host computer；
Code reader 65 determines the model of battery core mould group for carrying out barcode scanning to battery core mould group.
Battery core mould group electrical connection detection method of the present invention and device, the battery core mould group include more string battery cores, are led to
Detection is crossed to the voltage after discharging after the voltage before every string battery core electric discharge in battery core mould group mostly string battery core, with according to testing result
Determine that the average voltage of multiple battery cores is poor, so that it is determined that the electrical connection quality of battery core mould group.By using battery core module internal
The correspondence parameter of battery core determines electrical connection quality, and the method different from only can determine that surface electrical connection quality can be to battery core mould
The internal electrical connection quality of group is accurately detected.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of battery core mould group is electrically connected detection method, the battery core mould group includes more string battery cores, which is characterized in that the battery core
Mould group is electrically connected detection method
Obtain the quiescent voltage of every string battery core in more string battery cores；
It is discharged respectively with predetermined current every string battery core；
, in every string battery core difference discharge process, the discharge voltage of every string battery core is being obtained with predetermined current；
The voltage of every string battery core is determined according to the discharge voltage of the quiescent voltage of every string battery core and every string battery core
Difference；
Determine that the average voltage of the multiple battery core is poor according to the voltage difference of every string battery core；
According to the average voltage of the multiple battery core, the voltage difference of poor, described every string battery core and consistency threshold value determine the electricity
The electrical connection quality of core model group.
2. battery core mould group according to claim 1 is electrically connected detection method, which is characterized in that described according to the multiple electricity
The voltage difference and consistency threshold value of poor, the described every string battery core of the average voltage of core determine the electrical connection quality of the battery core mould group
Include:
According to it is described it is every string battery core voltage difference determine the battery core in the multiple battery core maximum voltage difference and the multiple electricity
The minimum voltage difference of battery core in core；
The maximum voltage difference of battery core according to the average voltage of the multiple battery core in poor, the multiple battery core and the multiple
The minimum voltage difference of battery core in battery core determines the consistency value of the battery core mould group；
The electrical connection quality of the battery core mould group is determined according to the consistency value of the battery core mould group and the consistency threshold value.
3. battery core mould group according to claim 2 is electrically connected detection method, which is characterized in that the battery core mould group it is consistent
Property value is calculated by the following formula:
Wherein, D is the consistency value of the battery core mould group, VmaxFor the battery core in the multiple battery core
Maximum voltage difference, VaveAverage voltage for the multiple battery core is poor, VminFor the minimum electricity of the battery core in the multiple battery core
Pressure difference.
4. battery core mould group according to claim 1 is electrically connected detection method, which is characterized in that the battery core mould group electrical connection
Detection method further include:
Detect the model of the battery core mould group；
The predetermined current is determined according to the model of the battery core mould group.
5. battery core mould group according to claim 2 is electrically connected detection method, which is characterized in that described according to the battery core mould
The consistency value and the consistency threshold value of group determine that the electrical connection quality of the battery core mould group includes:
When the consistency value of the battery core mould group is more than or equal to the consistency threshold value, the electrical connection of the battery core mould group is judged
Occur abnormal；
When the consistency value of the battery core mould group is less than the consistency threshold value, the electrical connection of the battery core mould group is being judged just
Often.
6. a kind of battery core mould group is electrically connected detection device, the battery core mould group includes more string battery cores, which is characterized in that the battery core
Mould group is electrically connected detection device
Acquiring unit (1), discharge cell (2) and processing unit (3), wherein
The acquiring unit (1) is used to obtain the quiescent voltage of every string battery core in more string battery cores；
The discharge cell (2) is for discharging respectively to every string battery core with predetermined current；
The acquiring unit (1) is also used to, in every string battery core difference discharge process, obtain described every with predetermined current
The discharge voltage of string battery core；
The processing unit (3) is used to be determined according to the quiescent voltage of every string battery core and the discharge voltage of every string battery core
The voltage difference of every string battery core；Determine that the average voltage of the multiple battery core is poor according to the voltage difference of every string battery core；With
And the voltage difference of poor, described every string battery core and consistency threshold value determine the battery core according to the average voltage of the multiple battery core
The electrical connection quality of mould group.
7. battery core mould group according to claim 6 is electrically connected detection device, which is characterized in that described according to the multiple electricity
The voltage difference and consistency threshold value of poor, the described every string battery core of the average voltage of core determine the electrical connection quality of the battery core mould group
Include:
According to it is described it is every string battery core voltage difference determine the battery core in the multiple battery core maximum voltage difference and the multiple electricity
The minimum voltage difference of battery core in core；
The maximum voltage difference of battery core according to the average voltage of the multiple battery core in poor, the multiple battery core and the multiple
The minimum voltage difference of battery core in battery core determines the consistency value of the battery core mould group；
The electrical connection quality of the battery core mould group is determined according to the consistency value of the battery core mould group and the consistency threshold value.
8. battery core mould group according to claim 7 is electrically connected detection device, which is characterized in that the battery core mould group it is consistent
Property value is calculated by the following formula:
Wherein, D is the consistency value of the battery core mould group, VmaxFor the battery core in the multiple battery core
Maximum voltage difference, VaveAverage voltage for the multiple battery core is poor, VminFor the minimum electricity of the battery core in the multiple battery core
Pressure difference.
9. battery core mould group according to claim 6 is electrically connected detection device, which is characterized in that the battery core mould group electrical connection
Detection device further includes detection unit (4), for detecting the model of the battery core mould group；
The processing unit (3) is also used to determine the predetermined current according to the model of the battery core mould group.
10. battery core mould group according to claim 7 is electrically connected detection device, which is characterized in that described according to the battery core
The consistency value of mould group and the consistency threshold value determine that the electrical connection quality of the battery core mould group includes:
When the consistency value of the battery core mould group is more than or equal to the consistency threshold value, the electrical connection of the battery core mould group is judged
Occur abnormal；
When the consistency value of the battery core mould group is less than the consistency threshold value, the electrical connection of the battery core mould group is being judged just
Often.
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| CN111257784A (en) * | 2020-01-15 | 2020-06-09 | 浙江零跑科技有限公司 | Multi-serial-parallel battery module abnormity detection method |
| CN112230166A (en) * | 2020-03-31 | 2021-01-15 | 蜂巢能源科技有限公司 | Module harness on-off test device and method and module offline test system |
| WO2021068121A1 (en) * | 2019-10-09 | 2021-04-15 | 深圳市大疆创新科技有限公司 | Battery detection method, battery, electronic device and storage medium |
| CN113156318A (en) * | 2021-04-25 | 2021-07-23 | 北京骑胜科技有限公司 | Fault battery cell detection method and device, electronic equipment and storage medium |
| CN116125325A (en) * | 2022-12-06 | 2023-05-16 | 北汽福田汽车股份有限公司 | Method and device for detecting consistency of battery cells, vehicle and storage medium |
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Application publication date: 20190503 |