CN108459273B - Battery cell delivery test method and device - Google Patents
Battery cell delivery test method and device Download PDFInfo
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- CN108459273B CN108459273B CN201810169779.8A CN201810169779A CN108459273B CN 108459273 B CN108459273 B CN 108459273B CN 201810169779 A CN201810169779 A CN 201810169779A CN 108459273 B CN108459273 B CN 108459273B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
Abstract
The invention provides a battery cell delivery test method and a device, which relate to the technical field of voltage test and comprise the following steps: acquiring a time value and a corresponding voltage drop K value of a battery pack to be tested when the battery pack is matched in a workshop; acquiring a time value of a battery pack to be tested before delivery and a corresponding voltage drop K value; calculating the voltage drop rate of the battery pack to be tested in a time period from the completion of the group matching in the workshop to the delivery according to the time value and the corresponding voltage drop K value of the battery pack to be tested when the group matching is completed in the workshop and the time value and the corresponding voltage drop K value of the battery pack to be tested before the delivery; judging whether the voltage drop rate of the battery pack to be tested is within a preset range in a time period from the completion of the group matching in a workshop to the delivery of the factory; and if so, determining that the battery pack to be tested leaves the factory. The method and the device can improve the accuracy of the self-discharge measurement of the battery pack to be measured.
Description
Technical Field
The invention relates to the technical field of voltage testing, in particular to a battery cell delivery testing method and device.
Background
When the battery is not used, the charge of the battery may also be automatically reduced or disappeared, which is the self-discharge of the battery. Therefore, before the battery is shipped, each battery manufacturer generally tests the self-discharge capability of the battery. In the prior art, the voltage value is measured twice only after the workshops are matched, so that the voltage drop K value is calculated, and the self-discharge capacity of the battery is measured through the voltage drop K value. The battery pack is then placed in a workshop or storage box for storage.
However, in the process of storing in a workshop from the completion of workshop matching to the shipment, dust in the air or metal powder stuck on the pole pieces and the diaphragms during manufacture possibly causes internal micro short circuit. Because an absolute dust-free chamber cannot be used during storage, when the dust is not enough to pierce the diaphragm and the anode and the cathode are in short circuit contact, the influence on the battery is not great, but when the dust seriously pierces the diaphragm by the degree, the influence on the battery is very obvious, and the test is inaccurate.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for testing battery cells when leaving a factory, which can improve the accuracy of self-discharge measurement of a battery pack.
In a first aspect, an embodiment of the present invention provides a method for factory testing of a battery cell, including: acquiring a time value and a corresponding voltage drop K value of a battery pack to be tested when the battery pack is matched in a workshop; acquiring a time value of a battery pack to be tested before delivery and a corresponding voltage drop K value; calculating the voltage drop rate of the battery pack to be tested in a time period from the completion of the group matching in the workshop to the delivery according to the time value and the corresponding voltage drop K value of the battery pack to be tested when the group matching is completed in the workshop and the time value and the corresponding voltage drop K value of the battery pack to be tested before the delivery; judging whether the voltage drop rate of the battery pack to be tested in the time period from the completion of the group matching in the workshop to the delivery is within a preset range or not; and if so, determining that the battery pack to be tested leaves the factory.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the voltage drop rate of the battery pack to be tested in a time period from when the battery pack to be tested is configured in the workshop to before the factory leaves is calculated according to the time and the corresponding voltage drop K value of the battery pack to be tested when the configuration of the workshop is completed, and the time and the corresponding voltage drop K value of the battery pack to be tested before the factory leaves, and the calculation formula is as follows:
wherein, delta K is the voltage drop rate of the battery pack to be measured in the time period from the completion of the matching of the workshop to the shipment, K2The voltage drop K value, K of the battery pack to be tested before leaving factory1Voltage drop K value, T value of battery pack to be tested when matching is completed in workshop2Is the time value, K, before the battery pack to be tested leaves the factory1And (4) the time value of the battery pack to be tested when the battery pack matching is completed in the workshop.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where before the step of obtaining a time value and a corresponding voltage drop K value of a battery pack to be tested when a workshop finishes pairing, the method further includes: and recording the time values and the corresponding pressure drop values of the plurality of battery packs when the matching of the battery packs in the workshop is finished in a first recording table, so as to obtain the time values and the corresponding pressure drop K values of the battery packs to be tested when the matching of the battery packs in the workshop is finished in the first recording table.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where before the step of obtaining a time value before shipment of a battery pack to be tested and a corresponding voltage drop K value, the method further includes: recording the time values of the multiple battery packs before leaving the factory and the corresponding voltage drop K values in a second recording table, so as to obtain the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in the second recording table.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the third possible implementation manner further includes: and storing the first record table and the second record table so as to facilitate the data checking of the working personnel.
In a second aspect, an embodiment of the present invention further provides a device for testing a battery cell leaving a factory, including: the acquisition module is used for acquiring a time value and a corresponding voltage drop K value of the battery pack to be tested when the battery pack to be tested is matched in a workshop, and acquiring a time value and a corresponding voltage drop K value of the battery pack to be tested before leaving a factory; the calculation module is used for calculating the voltage drop rate of the battery pack to be tested in a time period from the completion of the group matching in the workshop to the delivery of the battery pack to be tested according to the time value and the corresponding voltage drop K value of the battery pack to be tested when the group matching in the workshop is completed and the time value and the corresponding voltage drop K value of the battery pack to be tested before the delivery of the battery pack to be tested; the judging module is used for judging whether the voltage drop rate of the battery pack to be detected in the time period from the completion of the matching of the workshop to the delivery from the factory is within a preset range or not; and the determining module is used for determining that the battery pack to be tested leaves a factory if the battery pack to be tested exists.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the calculation formula in the calculation module is:
wherein, delta K is the voltage drop rate of the battery pack to be measured in the time period from the completion of the matching of the workshop to the shipment, K2The voltage drop K value, K of the battery pack to be tested before leaving factory1Voltage drop K value, T value of battery pack to be tested when matching is completed in workshop2Is the time value, K, before the battery pack to be tested leaves the factory1And (4) the time value of the battery pack to be tested when the battery pack matching is completed in the workshop.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the method further includes: the first recording module is used for recording time values and corresponding pressure drop values of the plurality of battery packs when the matching of the battery packs in the workshop is completed in a first recording table so as to obtain the time values and the corresponding pressure drop K values of the battery packs to be tested when the matching of the battery packs in the workshop is completed in the first recording table.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the third possible implementation manner further includes: the second recording module is used for recording the time values of the multiple battery packs before leaving the factory and the corresponding voltage drop K values in a second recording table so as to acquire the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in the second recording table.
With reference to the second aspect, an embodiment of the present invention provides a fourth possible implementation manner of the second aspect, where the fourth possible implementation manner further includes: and the storage module is used for storing the first record table and the second record table so as to facilitate the data checking of workers.
The embodiment of the invention has the following beneficial effects: the method comprises the steps of obtaining a time value and a corresponding pressure drop K value of a battery pack to be measured when matching of the battery pack is completed in a workshop, obtaining a time value and a corresponding pressure drop K value of the battery pack to be measured before delivery, calculating a pressure drop rate of the battery pack to be measured in a time period from the completion of matching of the workshop to the delivery according to the time value and the corresponding pressure drop K value of the battery pack to be measured when matching of the battery pack is completed in the workshop and the time value and the corresponding pressure drop K value of the battery pack to be measured before delivery, judging whether the pressure drop rate is within a preset range, if so, determining delivery of the battery pack to be measured, calculating the pressure drop rate of the battery pack in the time period from the completion of matching of the workshop to the delivery by obtaining different pressure drop K values of two times, improving the accuracy of self-discharge measurement of the battery pack, and providing a theoretical basis.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a battery cell factory testing method according to an embodiment of the present invention;
fig. 2 is a flowchart of a battery cell factory testing method according to another embodiment of the present invention;
fig. 3 is a structural diagram of a battery cell factory testing apparatus according to an embodiment of the present invention;
fig. 4 is a structural diagram of a battery cell factory testing apparatus according to another embodiment of the present invention.
Icon:
300-battery cell delivery test device; 310-an acquisition module; 320-a calculation module; 330-a judgment module; 340-a determination module; 350-a first recording module; 360-a second recording module; 370-save module.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the battery is not used, the charge of the battery may also be automatically reduced or disappeared, which is the self-discharge of the battery. The self-discharge of the battery can be divided into two types, one is self-discharge in which the loss capacity can be reversibly compensated, and the other is self-discharge in which the loss capacity cannot be reversibly compensated. The first cause of reversible capacity loss is the occurrence of reversible discharge reactions, the principle of which is consistent with normal cell discharge reactions. The second cause of irreversible capacity loss is that when irreversible reaction occurs inside the battery, the capacity loss is irreversible, for example: the positive electrode and the electrolyte have an irreversible reaction, the negative electrode material and the electrolyte have an irreversible reaction, and the irreversible reaction is caused by impurities carried by the electrolyte.
Therefore, before the battery is shipped, each battery manufacturer generally tests the self-discharge capability of the battery. In the prior art, the voltage value is measured twice only after the workshops are matched, so that the voltage drop K value is calculated, and the self-discharge capacity of the battery is measured through the voltage drop K value. The batteries are then placed in a workshop or storage box for storage in such a way that only the above self-discharge situation is detected.
However, in the existing solutions, it is not considered that dust in the air or metal powder stuck to the pole pieces and the diaphragms during manufacture may cause internal micro short circuit in the process of workshop storage after the workshop matching is completed and before the workshop is shipped. Because an absolute dust-free chamber cannot be used during storage, when the dust is not enough to pierce the diaphragm and the anode and the cathode are in short circuit contact, the influence on the battery is not great, but when the dust seriously pierces the diaphragm by the degree, the influence on the battery is very obvious, and the test is inaccurate.
Based on this, the battery delivery test method and apparatus provided by the embodiment of the present invention can obtain the time value and the corresponding voltage drop K value of the battery pack to be tested when completing the battery configuration in the workshop, obtain the time value and the corresponding voltage drop K value of the battery pack to be tested before delivery, calculate the voltage drop rate of the battery pack to be tested in the time period from the completion of the battery configuration in the workshop to the delivery according to the time value and the corresponding voltage drop K value of the battery pack to be tested when completing the battery configuration in the workshop and the time value and the corresponding voltage drop K value of the battery pack to be tested before delivery, determine whether the voltage drop rate is within the preset range, if yes, determine that the battery pack to be tested is delivered from the factory, so as to calculate the voltage drop rate of the battery pack in the time period from the completion of the battery configuration in the workshop to the delivery by obtaining different voltage drop K values of two times, and improve the accuracy of, providing a theoretical basis for subsequent improvement work of improving the performance of the battery.
Example one
To facilitate understanding of the embodiment, a detailed description is first given of a battery cell factory testing method disclosed in the embodiment of the present invention. The method for testing the battery cell leaving the factory, provided by the embodiment of the invention, is shown in fig. 1, and includes:
s110: and acquiring a time value and a corresponding voltage drop K value of the battery pack to be tested when the battery pack matching is completed in a workshop.
Specifically, the method comprises the following steps: the battery pack is formed by matching a plurality of battery cells, and a worker measures the voltage drop K value of the battery pack to be tested after completing matching of the plurality of battery cells in a workshop and records the time when matching is completed in the workshop. The voltage drop K value of the battery is the voltage of two measurements divided by the time between the two measurements, and the unit is V/t.
S120: and acquiring the time value of the battery pack to be tested before leaving the factory and the corresponding voltage drop K value.
Specifically, the voltage drop K value of the battery pack to be tested is measured before the battery pack to be tested is shipped, and the specific shipment time is recorded.
S130: and calculating the voltage drop rate of the battery pack to be tested in the time period from the completion of the group matching in the workshop to the delivery according to the time value and the corresponding voltage drop K value of the battery pack to be tested when the group matching is completed in the workshop and the time value and the corresponding voltage drop K value of the battery pack to be tested before the delivery.
Step S130 specifically: according to the time and the corresponding voltage drop K value of the battery pack to be tested when the matching of the battery pack in the workshop is completed and the time and the corresponding voltage drop K value of the battery pack to be tested before the delivery, the voltage drop rate of the battery pack to be tested in the time period from the completion of the matching of the workshop to the delivery is calculated, and the calculation formula is as follows:
wherein, delta K is the voltage drop rate of the battery pack to be measured in the time period from the completion of the matching of the workshop to the shipment, K2The voltage drop K value, K of the battery pack to be tested before leaving factory1Voltage drop K value, T value of battery pack to be tested when matching is completed in workshop2Is the time value, K, before the battery pack to be tested leaves the factory1And (4) the time value of the battery pack to be tested when the battery pack matching is completed in the workshop.
And calculating the voltage drop rate of the battery pack to be measured in the time period from the completion of the group matching of the workshop to the shipment, namely calculating the voltage drop rate in the time period.
S140: judging whether the voltage drop rate of the battery pack to be tested is within a preset range in a time period from the completion of the group matching in a workshop to the delivery of the factory; if yes, step S150 is performed, and if no, step S160 is performed.
Specifically, the cause of the variation in the voltage drop of the battery pack is a self-discharge process of the battery. And judging whether the voltage drop rate of the battery is in a normal range, if so, indicating that the quality of the battery is qualified, and enabling the battery to leave a factory. If not, the battery may have an irreversible reaction in the storage process, the battery pack may not be used normally, and the battery pack may not leave the factory. Wherein, the step S150: and determining that the battery pack to be tested leaves a factory. Step S160 is: and recovering the battery pack to be tested.
In some optional embodiments, as shown in fig. 2, in combination, the method for factory testing of a battery cell according to an embodiment of the present invention further includes:
s210: and recording the time values and the corresponding pressure drop values of the plurality of battery packs when the matching of the battery packs in the workshop is finished in a first recording table, so as to obtain the time values and the corresponding pressure drop K values of the battery packs to be tested when the matching of the battery packs in the workshop is finished in the first recording table.
S220: recording the time values of the multiple battery packs before leaving the factory and the corresponding voltage drop K values in a second recording table, so as to obtain the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in the second recording table.
S230: and the first record table and the second record table are saved so as to facilitate the data viewing of workers.
Fig. 2 shows a method for acquiring a time value and a corresponding voltage drop value of a battery pack when the battery pack is matched in a workshop, and a time value and a corresponding voltage drop value of the battery pack when the battery pack is matched in the workshop. For example: to calculate the voltage drop rate of the battery pack a, the information of the battery pack a is searched in the first recording table, the information of the battery pack B is searched in the second recording table, and then the voltage drop rate of the battery pack a is obtained by calculation. Optionally, the first recording table and the second recording table can be stored, so that whether the manufacturing environment of a workshop or the storage environment has too much dust or not can be found by workers in time, the workers can improve the working environment in time, and the success rate of battery manufacturing is improved.
Example two:
referring to fig. 3, an embodiment of the present invention provides a battery cell factory testing apparatus 300, including: an acquisition module 310, a calculation module 320, a determination module 330, and a determination module 340. Wherein the content of the first and second substances,
the obtaining module 310 is configured to obtain a time value and a corresponding voltage drop K value of the battery pack to be tested when the battery pack is configured in a workshop, and obtain a time value and a corresponding voltage drop K value of the battery pack to be tested before leaving a factory;
the calculating module 320 is connected to the obtaining module 310, and the calculating module 320 is configured to calculate a voltage drop rate of the battery pack to be measured in a time period from when the group matching of the workshop is completed to before the factory according to the time value and the corresponding voltage drop K value of the battery pack to be measured when the group matching of the workshop is completed and the time value and the corresponding voltage drop K value of the battery pack to be measured before the factory leave;
the judging module 330 is connected to the calculating module 320, and the judging module 330 is configured to judge whether the voltage drop rate of the battery pack to be tested in the time period from the completion of the group matching in the workshop to the time period before the factory leaving is within a preset range;
the determining module 340 is connected to the judging module 330, and if yes, the determining module 340 is configured to determine that the battery pack to be tested leaves the factory.
In some alternative embodiments, the calculation in calculation module 320 is:
wherein, delta K is the voltage drop rate of the battery pack to be measured in the time period from the completion of the matching of the workshop to the shipment, K2The voltage drop K value, K of the battery pack to be tested before leaving factory1Voltage drop K value, T value of battery pack to be tested when matching is completed in workshop2Is the time value, K, before the battery pack to be tested leaves the factory1And (4) the time value of the battery pack to be tested when the battery pack matching is completed in the workshop.
In some optional embodiments, as shown in fig. 4, the factory cell testing apparatus 300 further includes: the first recording module 350, the first recording module 350 is connected to the obtaining module 310, and is configured to record time values and corresponding voltage drop values of the multiple battery packs when the battery packs are matched in the workshop in a first recording table, so as to obtain time values and corresponding voltage drop K values of the battery packs to be tested when the battery packs are matched in the workshop in the first recording table.
In some optional embodiments, as further shown in fig. 4, the battery cell factory testing apparatus 300 further includes: and the second recording module 360, where the second recording module 360 is connected to the obtaining module 310, and is configured to record the time values of the multiple battery packs before leaving the factory and the corresponding voltage drop K values in a second recording table, so as to obtain the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in the second recording table.
In some optional embodiments, as shown in fig. 4, the method further includes: and the storage module is used for storing the first record list and the second record list so as to facilitate the data checking of the working personnel.
Unless specifically stated otherwise, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A battery cell delivery test method is characterized by comprising the following steps:
acquiring a time value and a corresponding voltage drop K value of a battery pack to be tested when the battery pack is matched in a workshop;
acquiring a time value of a battery pack to be tested before delivery and a corresponding voltage drop K value;
calculating the voltage drop rate of the battery pack to be tested in a time period from the completion of the group matching in the workshop to the delivery according to the time value and the corresponding voltage drop K value of the battery pack to be tested when the group matching is completed in the workshop and the time value and the corresponding voltage drop K value of the battery pack to be tested before the delivery;
judging whether the voltage drop rate of the battery pack to be tested in the time period from the completion of the group matching in the workshop to the delivery is within a preset range or not;
if so, determining that the battery pack to be tested leaves a factory;
and calculating the voltage drop rate of the battery pack to be tested in the time period from the completion of the group matching in the workshop to the delivery of the battery pack to be tested according to the time and the corresponding voltage drop K value of the battery pack to be tested when the group matching in the workshop is completed and the time and the corresponding voltage drop K value of the battery pack to be tested before the delivery of the battery pack to be tested, wherein the calculation formula is as follows:
wherein, delta K is the voltage drop rate of the battery pack to be measured in the time period from the completion of the matching of the workshop to the shipment, K2The voltage drop K value, K of the battery pack to be tested before leaving factory1Voltage drop K value, T value of battery pack to be tested when matching is completed in workshop2Is the time value, K, before the battery pack to be tested leaves the factory1And (4) the time value of the battery pack to be tested when the battery pack matching is completed in the workshop.
2. The method according to claim 1, wherein before the step of obtaining the time value and the corresponding voltage drop K value of the battery pack to be tested when the battery pack is matched in the workshop, the method further comprises the following steps:
and recording the time values and the corresponding pressure drop values of the plurality of battery packs when the matching of the battery packs in the workshop is finished in a first recording table, so as to obtain the time values and the corresponding pressure drop K values of the battery packs to be tested when the matching of the battery packs in the workshop is finished in the first recording table.
3. The method according to claim 2, wherein before the step of obtaining the time value before factory shipment of the battery pack to be tested and the corresponding voltage drop K value, the method further comprises:
recording the time values of the multiple battery packs before leaving the factory and the corresponding voltage drop K values in a second recording table, so as to obtain the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in the second recording table.
4. The method of claim 3, further comprising:
and storing the first record table and the second record table so as to facilitate the data checking of the working personnel.
5. The utility model provides a battery cell test device that dispatches from factory which characterized in that includes:
the acquisition module is used for acquiring a time value and a corresponding voltage drop K value of the battery pack to be tested when the battery pack to be tested is matched in a workshop, and acquiring a time value and a corresponding voltage drop K value of the battery pack to be tested before leaving a factory;
the calculation module is used for calculating the voltage drop rate of the battery pack to be tested in a time period from the completion of the group matching in the workshop to the delivery of the battery pack to be tested according to the time value and the corresponding voltage drop K value of the battery pack to be tested when the group matching in the workshop is completed and the time value and the corresponding voltage drop K value of the battery pack to be tested before the delivery of the battery pack to be tested;
the judging module is used for judging whether the voltage drop rate of the battery pack to be detected in the time period from the completion of the matching of the workshop to the delivery from the factory is within a preset range or not;
the determining module is used for determining that the battery pack to be tested leaves a factory if the battery pack to be tested is judged to be in the factory;
the calculation formula in the calculation module is as follows:
wherein, delta K is the voltage drop rate of the battery pack to be measured in the time period from the completion of the matching of the workshop to the shipment, K2The voltage drop K value, K of the battery pack to be tested before leaving factory1Voltage drop K value, T value of battery pack to be tested when matching is completed in workshop2Is the time value, K, before the battery pack to be tested leaves the factory1And (4) the time value of the battery pack to be tested when the battery pack matching is completed in the workshop.
6. The apparatus of claim 5, further comprising:
the first recording module is used for recording time values and corresponding pressure drop values of a plurality of battery packs to be tested in a workshop when the matching of the battery packs in the workshop is finished in a first recording table, so that the time values and the corresponding pressure drop K values of the battery packs to be tested in the workshop when the matching of the battery packs in the workshop is finished are obtained in the first recording table.
7. The apparatus of claim 6, further comprising:
the second recording module is used for recording the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in a second recording table so as to acquire the time values of the battery packs to be tested before leaving the factory and the corresponding voltage drop K values in the second recording table.
8. The apparatus of claim 7, further comprising:
and the storage module is used for storing the first record table and the second record table so as to facilitate the data checking of workers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169779.8A CN108459273B (en) | 2018-02-28 | 2018-02-28 | Battery cell delivery test method and device |
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