CN216488418U - Electricity core test connection piece and electric core testing arrangement - Google Patents

Electricity core test connection piece and electric core testing arrangement Download PDF

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Publication number
CN216488418U
CN216488418U CN202122875848.7U CN202122875848U CN216488418U CN 216488418 U CN216488418 U CN 216488418U CN 202122875848 U CN202122875848 U CN 202122875848U CN 216488418 U CN216488418 U CN 216488418U
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China
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cell
test
connection
channel
testing
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CN202122875848.7U
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霍紫瑞
刘灿
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Guangzhou Xiaopeng Automobile Technology Co Ltd
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Guangzhou Xiaopeng Automobile Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model provides a battery cell test connecting sheet and a battery cell test device. According to the cell test connecting sheet and the cell test device provided by the embodiment of the utility model, the first connecting sheet and the second connecting sheet which can be respectively connected with different test channels and the adapter sheet connected with the electrode of the cell are arranged on the cell test connecting sheet, so that an original channel is not required to be detached during a DCR test, secondary installation is not required, the problem of capacity jump caused by secondary installation is avoided, more accurate cycle data can be obtained, and the cell test connecting sheet and the cell test device are more effectively used for battery evaluation.

Description

Electricity core test connection piece and electric core testing arrangement
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery cell test connecting sheet and a battery cell test device.
Background
The lithium ion battery generally needs to perform a DCR test (direct current internal resistance test), which is one of important indicators for evaluating battery performance, and is often used to evaluate the state of health of the battery, predict the life of the battery, and estimate the SOC (state of charge) of the system, the output and input capabilities, and the like. In the DCR test, generally, after the charging and discharging test is performed for a certain number of cycles (e.g., 200 cycles) or after the capacity is attenuated to a certain degree (e.g., 5%), the charging and discharging are stopped, the battery is taken out and installed on another test channel to perform the dc internal resistance DCR test, and after the test is completed, the battery is installed back to the original channel to continue the charging and discharging for the test. However, in this way, the secondary installation often causes inconsistency before and after the connection of the battery, and the problem of capacity jump occurs during the secondary charge-discharge cycle test, which causes the problem of inaccurate test.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cell test connecting sheet and a cell test device, which can avoid secondary installation, avoid the problem of capacity jump and ensure that more accurate cycle data can be obtained so as to be more effectively used for battery evaluation.
The embodiment of the utility model provides a battery cell test connecting sheet which comprises a switching sheet, a first connecting sheet and a second connecting sheet, wherein the first connecting sheet and the second connecting sheet are respectively and electrically connected with the switching sheet, and the switching sheet is used for being electrically connected to an electrode of a battery cell.
In one embodiment, the first connecting piece and the second connecting piece are respectively provided with a through hole.
In one embodiment, the first connecting piece and/or the second connecting piece are electrically connected to the adapter piece through a deformable portion.
In one embodiment, the adapter sheet, the first connecting sheet and the second connecting sheet are all made of hard materials.
In one embodiment, the adapter plate is rectangular, and the first connecting plate and the second connecting plate are respectively arranged at two side edges of the adapter plate.
In an embodiment, the cell testing connecting sheet further includes a third connecting sheet, and the third connecting sheet is electrically connected to the adaptor sheet.
The embodiment of the utility model further provides a cell testing device, which is used for testing a cell, wherein the electrode of the cell comprises an anode and a cathode, the cell testing device comprises a testing cabinet and the cell testing connecting sheet, the testing cabinet comprises a first channel and a second channel, the first channel comprises a first wire and a second wire, the second channel comprises a third wire and a fourth wire, the anode and the cathode of the cell are respectively and electrically connected with the switching sheets of the two cell testing connecting sheets, the first connecting sheets of the two cell testing connecting sheets are respectively and electrically connected with the two first wires, the first connecting sheets of the two cell testing connecting sheets are also respectively and electrically connected with the two second wires, and the second connecting sheets of the two cell testing connecting sheets are respectively and electrically connected with the two third wires, the second connecting pieces of the two battery cell testing connecting pieces are also electrically connected to the two fourth electric wires respectively.
The embodiment of the utility model also provides a cell testing device, which is used for testing a cell, wherein an electrode of the cell comprises an anode and a cathode, the cell testing device comprises a testing cabinet and the cell testing connecting sheets, the testing cabinet comprises a first channel and a second channel, the first channel comprises a first wire and a second wire, the second channel comprises a third wire and a fourth wire, the anode and the cathode of the cell are respectively and electrically connected with the switching sheets of the two cell testing connecting sheets, the first connecting sheets of the two cell testing connecting sheets are respectively and electrically connected with the two first wires, the second connecting sheets of the two cell testing connecting sheets are respectively and electrically connected with the two second wires, and the third connecting sheets of the two cell testing connecting sheets are respectively and electrically connected with the two third wires, the third connecting pieces of the two battery cell testing connecting pieces are also electrically connected to the two fourth wires respectively.
In one embodiment, the first channel is a loop test channel, and the second channel is a DCR test channel.
According to the cell test connecting sheet and the cell test device provided by the embodiment of the utility model, the first connecting sheet and the second connecting sheet which can be respectively connected with different test channels and the adapter sheet connected with the electrode of the cell are arranged on the cell test connecting sheet, so that an original channel is not required to be detached during a DCR test, secondary installation is not required, the problem of capacity jump caused by secondary installation is avoided, more accurate cycle data can be obtained, and the cell test connecting sheet and the cell test device are more effectively used for battery evaluation.
Drawings
Fig. 1 is a schematic structural diagram of a cell test connection sheet according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a cell test connection sheet according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cell testing apparatus according to a third embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description is given to the specific embodiments, structures, features and effects of the present invention in conjunction with the accompanying drawings and examples.
First embodiment
Fig. 1 is a schematic structural diagram of a cell test connection sheet according to a first embodiment of the present invention. Referring to fig. 1, the cell testing connection sheet of the present embodiment includes an adapter sheet 11, a first connection sheet 13 and a second connection sheet 15, where the first connection sheet 13 and the second connection sheet 15 are electrically connected to the adapter sheet 11 respectively. The interposer 11 is electrically connected to the electrode of the battery cell.
In this embodiment, the first connecting piece 13 and the second connecting piece 15 are respectively provided with a through hole 132. The first connecting piece 13 and the second connecting piece 15 are respectively used for electrically connecting with the wires of the test channels. Specifically, the wires of the test channels are inserted into the through holes 132. The test channels may include a circulation test channel and a DCR test channel (i.e., a dc internal resistance test channel), the first connection tab 13 is for electrically connecting to the wires of the circulation test channel, and the second connection tab 15 is for electrically connecting to the wires of the DCR test channel. Specifically, the through hole 132 may be opened at the center of the first connecting piece 13 or the second connecting piece 15.
In this embodiment, the first connecting piece 13 and the second connecting piece 15 are electrically connected to the interposer 11 through the deformable portion 17. In this way, a flexible connection area is formed at the connection position of the adapter sheet 11 and the first connection sheet 13 and the connection position of the adapter sheet 11 and the second connection sheet 15, and the first connection sheet 13 and the second connection sheet 15 can be bent to facilitate connection with the electric wire of the test channel.
In this embodiment, the adaptor sheet 11, the first connecting sheet 13 and the second connecting sheet 15 are made of hard materials, so as to ensure good contact during electrical connection.
In this embodiment, the interposer 11 is rectangular, and the first connection piece 13 and the second connection piece 15 are respectively disposed at two sides of the interposer 11. Specifically, the first connecting piece 13 and the second connecting piece 15 are respectively provided at two adjacent sides of the interposer 11. It is understood that the interposer 11 may also have other shapes such as triangle, pentagon, irregular shape, etc., and is not limited herein.
According to the cell test connecting sheet provided by the embodiment of the utility model, the first connecting sheet and the second connecting sheet which can be respectively connected with different test channels and the switching sheet connected with the electrode of the cell are arranged on the cell test connecting sheet, so that the original channel is not required to be detached during a DCR test (namely a direct current internal resistance test), secondary installation is not required, the problem of capacity jump caused by secondary installation is avoided, more accurate cycle data can be obtained, and the cell test connecting sheet is more effectively used for battery evaluation.
Second embodiment
Fig. 2 is a schematic structural diagram of a cell test connection sheet according to a second embodiment of the present invention. Referring to fig. 2, the structure of the cell test connection piece of the present embodiment is substantially the same as that of the cell test connection piece of the first embodiment, except that in the present embodiment, the cell test connection piece further includes a third connection piece 19, and the third connection piece 19 is electrically connected to the interposer 11.
In this embodiment, the test channel may include a circulation test channel and a DCR test channel, the first connecting pad 13 and the second connecting pad 15 are used for electrically connecting to a current line and a voltage line of the circulation test channel, and the third connecting pad 19 is used for electrically connecting to a wire of the DCR test channel. Of course, the connection relationship of the connecting pieces to the channels can be interchanged.
In this embodiment, the third connecting piece 19 is provided with a through hole 132.
In this embodiment, the third connecting piece 19 is electrically connected to the interposer 11 through the deformable portion 17.
In this embodiment, the third connecting pieces 19 are made of hard material.
In this embodiment, the first connecting piece 13 and the second connecting piece 15 are disposed on two opposite sides of the interposer 11, and the third connecting piece 19 is disposed on one side between the two sides of the first connecting piece 13 and the second connecting piece 15.
According to the cell test connecting sheet provided by the embodiment of the utility model, the first connecting sheet, the second connecting sheet and the third connecting sheet which can be respectively connected with different test channels and the adapter sheet connected with the electrode of the cell are arranged on the cell test connecting sheet, so that an original channel is not required to be detached during a DCR test, secondary installation is not required, the problem of capacity jump caused by secondary installation is avoided, more accurate cycle data can be obtained, and the cell test connecting sheet is more effectively used for battery evaluation; meanwhile, the three connecting sheets are arranged to separate the current and voltage connection, so that the problem of inaccurate voltage caused by the fact that the voltage division problem is caused by the fact that the connecting position has internal resistance can be avoided.
Third embodiment
Fig. 3 is a schematic structural diagram of a cell testing apparatus according to a third embodiment of the present invention. Referring to fig. 3, the cell testing apparatus of the present embodiment is used for testing a cell 100, an electrode of the cell 100 includes a positive electrode 102 and a negative electrode 104, and the cell testing apparatus includes a testing cabinet 31 and two cell testing connection sheets disclosed in the first embodiment. The test cabinet 31 includes a first channel 312 and a second channel 314, the first channel 312 including a first wire 317 and a second wire 318, the second channel 314 including a third wire 319 and a fourth wire 320. The positive electrode 102 and the negative electrode 104 of the battery cell 100 are electrically connected to the adaptor pieces 11 of the two battery cell test connection pieces, respectively. The first connection pieces 13 of the two cell test connection pieces are respectively and electrically connected to the two first electric wires 317, the first connection pieces 13 of the two cell test connection pieces are also respectively and electrically connected to the two second electric wires 318, the second connection pieces 15 of the two cell test connection pieces are respectively and electrically connected to the two third electric wires 319, and the second connection pieces 15 of the two cell test connection pieces are also respectively and electrically connected to the two fourth electric wires 320. Specifically, the first channel 312 may be a circulation test channel, the second channel 314 may be a DCR test channel, the first wire 317 and the second wire 318 may be a current line and a voltage line drawn in the circulation test channel, respectively, and the third wire 319 and the fourth wire 320 may be a current line and a voltage line drawn in the DCR test channel, respectively. In the embodiment, when the first channel 312 is used for testing, the battery cell 100 is charged and discharged through the first wire 317, and the voltage of the battery cell 100 is measured through the second wire 318; when the second channel 314 is used for testing, the battery cell 100 is charged and discharged through the third wire 319 (the charging and discharging current is different from that of the first channel), the voltage of the battery cell 100 is measured through the fourth wire 320, and then the internal resistance of the battery cell 100 is calculated.
When the electrical core testing apparatus of this embodiment is used for performing an electrical core test, the electrical core 100 is connected to wires of the channels, and then the electrical core 100 is charged and discharged through the first channel 312, and a current and voltage test is performed, after a certain number of cycles (for example, 200 cycles) of a charging and discharging cycle or a certain degree of attenuation (for example, 5% of attenuation) of the electrical core capacity, the charging and discharging of the electrical core 100 through the first channel 312 is stopped, a DCR test is performed on the electrical core 100 through the second channel 314, and then the charging and discharging of the electrical core 100 through the first channel 312 are completed. So, need not carry out the dismouting with electric core 100 in the passageway at the in-process of testing electric core, avoided the capacity jump problem that secondary installation brought, can obtain more accurate cycle data, more effectual be used for battery evaluation.
It can be understood that the cell testing device of another embodiment includes the testing cabinet 31 and two cell testing connection pieces disclosed in the second embodiment. The test cabinet 31 includes a first channel 312 and a second channel 314, the first channel 312 including a first wire 317 and a second wire 318, the second channel 314 including a third wire 319 and a fourth wire 320. The positive electrode 102 and the negative electrode 104 of the battery cell 100 are electrically connected to the adaptor pieces 11 of the two battery cell test connection pieces, respectively. The first connecting pieces 13 of the two cell testing connecting pieces are respectively and electrically connected to the two first electric wires 317, the second connecting pieces 15 of the two cell testing connecting pieces are respectively and electrically connected to the two second electric wires 318, the third connecting pieces 19 of the two cell testing connecting pieces are respectively and electrically connected to the two third electric wires 319, and the third connecting pieces 19 of the two cell testing connecting pieces are also respectively and electrically connected to the two fourth electric wires 320. Specifically, the first channel 312 may be a circulation test channel, the second channel 314 may be a DCR test channel, the first wire 317 and the second wire 318 may be a current line and a voltage line drawn in the circulation test channel, respectively, and the third wire 319 and the fourth wire 320 may be a current line and a voltage line drawn in the DCR test channel, respectively. In the embodiment, when the first channel 312 is used for testing, the battery cell 100 is charged and discharged through the first wire 317, and the voltage of the battery cell 100 is measured through the second wire 318; when the second channel 314 is used for testing, the battery cell 100 is charged and discharged through the third wire 319 (the charging and discharging current is different from that of the first channel), the voltage of the battery cell 100 is measured through the fourth wire 320, and then the internal resistance of the battery cell 100 is calculated. In this embodiment, the first wire 317 and the second wire 318 are respectively connected to different connection pads of the cell test connection pad, so as to separate the current and voltage connections, thereby avoiding the problem of inaccurate voltage caused by the voltage division problem due to the internal resistance at the connection point.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (9)

1. The utility model provides an electricity core test connection piece, its characterized in that includes adaptor piece (11), first connection piece (13) and second connection piece (15), first connection piece (13) with second connection piece (15) electric connection respectively in adaptor piece (11), wherein, adaptor piece (11) are used for electric connection on the electrode of electricity core.
2. The cell test connection tab of claim 1, wherein the first connection tab (13) and the second connection tab (15) each have a through hole (132) formed therein.
3. The cell test connection tab of claim 1, wherein the first connection tab (13) and/or the second connection tab (15) is electrically connected to the adapter tab (11) by means of a deformable portion (17).
4. The cell test connection tab of claim 1, wherein the adapter tab (11), the first connection tab (13) and the second connection tab (15) are made of a hard material.
5. The cell test connection tab of claim 1, wherein the interposer (11) is rectangular, and the first connection tab (13) and the second connection tab (15) are respectively provided at two side edges of the interposer (11).
6. The cell test tab of any of claims 1-5, further comprising a third tab (19), the third tab (19) being electrically connected to the interposer (11).
7. A cell testing device for testing a cell (100), the electrodes of the cell (100) comprising a positive electrode (102) and a negative electrode (104), characterized in that the cell testing device comprises a test cabinet (31) and two cell test connection pads according to any of claims 1 to 5, the test cabinet (31) comprising a first channel (312) and a second channel (314), the first channel (312) comprising a first wire (317) and a second wire (318), the second channel (314) comprising a third wire (319) and a fourth wire (320), the positive electrode (102) and the negative electrode (104) of the cell (100) being electrically connected to the interposer (11) of the two cell test connection pads, respectively, the first connection pads (13) of the two cell test connection pads being electrically connected to the two first wires (317), respectively, the first connecting pieces (13) of the two cell testing connecting pieces are further respectively connected to the two second electric wires (318), the second connecting pieces (15) of the two cell testing connecting pieces are respectively and electrically connected to the two third electric wires (319), and the second connecting pieces (15) of the two cell testing connecting pieces are further respectively and electrically connected to the two fourth electric wires (320).
8. A cell testing device for testing cells (100), the electrodes of the cells (100) comprising a positive electrode (102) and a negative electrode (104), characterized in that the cell testing device comprises a testing cabinet (31) and two cell testing connection pads according to claim 6, the testing cabinet (31) comprising a first channel (312) and a second channel (314), the first channel (312) comprising a first wire (317) and a second wire (318), the second channel (314) comprising a third wire (319) and a fourth wire (320), the positive electrode (102) and the negative electrode (104) of a cell (100) being electrically connected to the interposer (11) of the two cell testing connection pads, respectively, the first connection pads (13) of the two cell tests being electrically connected to the two first wires (317), respectively, the second connecting pieces (15) of the two cell testing connecting pieces are respectively connected to the two second electric wires (318), the third connecting pieces (19) of the two cell testing connecting pieces are respectively and electrically connected to the two third electric wires (319), and the third connecting pieces (19) of the two cell testing connecting pieces are also respectively and electrically connected to the two fourth electric wires (320).
9. The cell testing apparatus of claim 7 or 8, wherein the first channel (312) is a cycling test channel and the second channel (314) is a DCR test channel.
CN202122875848.7U 2021-11-22 2021-11-22 Electricity core test connection piece and electric core testing arrangement Active CN216488418U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122875848.7U CN216488418U (en) 2021-11-22 2021-11-22 Electricity core test connection piece and electric core testing arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122875848.7U CN216488418U (en) 2021-11-22 2021-11-22 Electricity core test connection piece and electric core testing arrangement

Publications (1)

Publication Number Publication Date
CN216488418U true CN216488418U (en) 2022-05-10

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CN202122875848.7U Active CN216488418U (en) 2021-11-22 2021-11-22 Electricity core test connection piece and electric core testing arrangement

Country Status (1)

Country Link
CN (1) CN216488418U (en)

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