CN220795418U

CN220795418U - Battery test fixture

Info

Publication number: CN220795418U
Application number: CN202322252600.4U
Authority: CN
Inventors: 刘俊虎
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-04-16
Anticipated expiration: 2033-08-21

Abstract

The application discloses battery test fixture includes: the first busbar and the second busbar are respectively used for connecting the positive electrode lug of the battery cell and the negative electrode lug of the battery cell; the first positive electrode copper bar and the second positive electrode copper bar are used for connecting the first busbar; the first negative electrode copper bar and the second negative electrode copper bar are used for connecting the second busbar; the fixing assembly is used for fixing the first positive electrode copper bar and the second positive electrode copper bar on the first busbar, and fixing the first negative electrode copper bar and the second negative electrode copper bar on the second busbar. According to the method, uneven contact and instability between the copper bar and the battery cell tab are reduced, the reliability of connection is improved, the risk of deformation and falling of the battery cell tab is reduced, and therefore the safety of a test is improved.

Description

Battery test fixture

Technical Field

The application relates to the technical field of lithium battery testing, in particular to a battery testing tool.

Background

With the continuous development of new energy industry, the performance test of the battery becomes an important link for ensuring the safety and reliability of the battery and reaching the performance standard through the updating iteration of the lithium ion battery technology. When the limit power of the battery is tested, a large current is needed, and an Arbi device is taken as an example, the range of a single test channel cannot meet the test requirement, and the problem that the range of the device is increased by connecting the test channels of the device in parallel is solved.

The existing parallel connection method comprises the following steps: preparing two groups of channel wires, wherein each group consists of two copper bars of an anode and a cathode of the test channel wires, fixing the anode copper bars of the two test channel wires on an anode tab of a battery cell, fixing the cathode copper bars of the two test channel wires on a cathode tab of the battery cell, and sending out an instruction by a computer end of an upper computer to combine the two groups of channels to finish the parallel connection.

However, two copper bars are fixed on the cell electrode lugs with limited size, the method ignores the shape and the volume of the copper bars, the copper bars of the equipment are hard and not easy to bend, the connection between the copper bars and the electrode lugs needs to find a specific angle, the method improves the difficulty of connecting the cell, the cell electrode lugs are easy to be stressed unevenly, the electrode lugs can deform or even fall off, and the safety of the test is influenced.

Disclosure of Invention

Based on this, it is necessary to provide a battery testing tool for the above technical problems.

This battery test fixture includes:

the first busbar and the second busbar are respectively used for connecting the positive electrode lug of the battery cell and the negative electrode lug of the battery cell;

the first positive electrode copper bar and the second positive electrode copper bar are used for connecting the first busbar;

the first negative electrode copper bar and the second negative electrode copper bar are used for connecting the second busbar;

the fixing assembly is used for fixing the first positive electrode copper bar and the second positive electrode copper bar on the first busbar and fixing the first negative electrode copper bar and the second negative electrode copper bar on the second busbar.

In some embodiments, the battery test fixture further comprises:

the first connecting plate and the second connecting plate are respectively arranged on the positive electrode tab and the negative electrode tab of the battery cell, and the first busbar and the second busbar are respectively connected with the positive electrode tab and the negative electrode tab of the battery cell through the first connecting plate and the second connecting plate.

In some embodiments, the first connection plate and the second connection plate are both formed into an L-shaped plate structure, two sides of the first connection plate are respectively used for fixing the battery cell positive electrode tab and the first busbar, and two sides of the second connection plate are respectively used for fixing the battery cell negative electrode tab and the second busbar.

In some embodiments, the first busbar is adapted to abut the first connection plate and the second busbar is adapted to abut the second connection plate.

In some embodiments, the first positive copper bar and the second positive copper bar are adapted to abut the first busbar, and the first negative copper bar and the second negative copper bar are adapted to abut the second busbar.

In some embodiments, the securing assembly comprises:

the first bolt is used for fixing the first positive copper bar on the first busbar;

and the second bolt is used for fixing the second positive copper bar and the first busbar on the first connecting plate.

In some embodiments, the securing assembly further comprises:

the third bolt is used for fixing the first negative copper bar and the second busbar on the second connecting plate;

and the fourth bolt is used for fixing the second negative copper bar on the second busbar.

In some embodiments, a first mounting hole is provided in a length direction of the first busbar, and the first bolt and the second bolt fix the first positive copper bar and the second positive copper bar through the first mounting hole.

In some embodiments, a second mounting hole is formed in the length direction of the second busbar, and the third bolt and the fourth bolt fix the first negative copper bar and the second negative copper bar through the second mounting hole.

In some embodiments, the battery test fixture further comprises:

the first positive electrode channel line and the second positive electrode channel line are respectively used for connecting the first positive electrode copper bar and the second positive electrode copper bar;

the first negative electrode channel line and the second negative electrode channel line are respectively used for connecting the first negative electrode copper bar and the second negative electrode copper bar.

Compared with the prior art, the beneficial effects of this application are:

the reliability of the connection cell is improved: compared with the existing parallel connection method, the method has the advantages that the first busbar, the second busbar and the fixing assembly are added, and the positive and negative electrode copper bars are firmly connected to the first busbar and the second busbar through the fixing assembly. The design reduces uneven contact and instability between the copper bar and the battery cell tab, improves the reliability of connection, and reduces the risk of deformation and falling of the battery cell tab, thereby improving the safety of the test.

Simplifying the connection process: the first connecting plate and the second connecting plate used in the scheme form an L-shaped plate-shaped structure, and the L-shaped plate-shaped structure and the L-shaped plate-shaped structure are respectively fixed on the positive electrode lug and the negative electrode lug of the battery cell. The design simplifies the connection process, and only the connection plate and the battery cell tab are aligned and fixed without considering specific angles and shapes. This simplified connection procedure reduces the operational difficulty and the possibility of errors compared to existing methods.

The expandability of the test channel is improved: through using first female row and the female row of second in the battery test fixture, can be with a plurality of test channels parallelly connected, so, test equipment's range obtains increasing, can satisfy higher test demand, has also improved flexibility and the suitability of test, and this is particularly important for the required heavy current when testing the limit power of battery.

Drawings

Fig. 1 is a schematic diagram of an exemplary embodiment of the present application.

In the figure: 1. a first busbar; 2. a second busbar; 21. a first positive copper bar; 22. a second positive copper bar; 31. a first negative copper bar; 32. a second negative copper bar; 41. a first connection plate; 42. a second connecting plate; 51. a first bolt; 52. a second bolt; 53. a third bolt; 54. and a fourth bolt.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As described in the background art, when testing the limit power of the battery, a large current is needed, for example, the Arbi n device is taken as an example, the range of a single test channel cannot meet the test requirement, and the solution is that the test channels of the device are connected in parallel to increase the range of the device. The existing parallel connection method comprises the following steps: preparing two groups of channel wires, wherein each group consists of two copper bars of an anode and a cathode of the test channel wires, fixing the anode copper bars of the two test channel wires on an anode tab of a battery cell, fixing the cathode copper bars of the two test channel wires on a cathode tab of the battery cell, and sending out an instruction by a computer end of an upper computer to combine the two groups of channels to finish the parallel connection. However, two copper bars are fixed on the cell electrode lugs with limited size, the method ignores the shape and the volume of the copper bars, the copper bars of the equipment are hard and not easy to bend, the connection between the copper bars and the electrode lugs needs to find a specific angle, the method improves the difficulty of connecting the cell, the cell electrode lugs are easy to be stressed unevenly, the electrode lugs can deform or even fall off, and the safety of the test is influenced.

In order to improve the above-mentioned problem, the application provides a battery test fixture, it mainly includes: the first connection plate 41, the second connection plate 42, the first busbar 1, the second busbar 2, the first positive electrode copper bar 21, the second positive electrode copper bar 22, the first negative electrode copper bar 31, the second negative electrode copper bar 32, the first positive electrode channel line, the second positive electrode channel line, the first negative electrode channel line, the second negative electrode channel line, and the fixing component.

Specifically, in the exemplary embodiment, the first connection plate 41 and the second connection plate 42 are key components in the battery testing fixture, and are respectively located on the positive electrode tab and the negative electrode tab of the battery cell, and are used for connecting the battery cell with the first busbar 1 and the second busbar 2.

Specifically, in the exemplary embodiment, the first connection plate 41 and the second connection plate 42 adopt an L-shaped plate-like structure, which is described in detail as follows:

first connection plate 41:

shape: an L-shaped plate-like structure made of a conductive material.

The functions are as follows: the first busbar 1 is used for connecting the positive electrode lug of the battery cell with the first busbar.

The structure is as follows: the plate-shaped part is made of conductive material, and the two sides of the plate-shaped part are respectively provided with a fixed interface and a connecting interface.

And (3) fixing an interface: one side of the connecting plate is fixed on the positive electrode lug of the battery cell.

Connection interface: the other side of the connecting plate is abutted with the first busbar 1.

Second connection plate 42:

shape: an L-shaped plate-like structure made of a conductive material.

The functions are as follows: and the negative electrode tab is used for connecting the battery cell with the second busbar 2.

And (3) fixing an interface: one side of the connecting plate is fixed on the negative electrode lug of the battery cell.

Connection interface: the other side of the connecting plate is abutted with the second busbar 2.

The design of the L-shaped plate-shaped structure enables the fixed interface part of the connecting plate to be tightly attached to the lug of the battery cell and firmly fixed through bolts or other fixing devices. The other side of the connecting plate is connected with the corresponding busbar, so that the electric connection between the battery and the test channel is ensured.

By using the first connection plate 41 and the second connection plate 42, the tab of the battery cell can be effectively fixed and electrically connected with the busbar reliably. The structure simplifies the connection process, improves the stability and reliability of connection, reduces the risks of deformation and falling of the battery cell lugs, and ensures the safety and accuracy of the test.

Specifically, in the exemplary embodiment, the first busbar 1 and the second busbar 2 are key components in the battery test fixture, and are used for connecting the positive electrode tab and the negative electrode tab of the battery cell, and providing electrical connection with the test equipment.

The specific description is as follows:

first busbar 1:

shape: the metal strip or the conductive plate with good conductive performance is usually made of conductive red copper, and a first mounting hole is formed in the length direction of the conductive red copper.

The functions are as follows: and the positive electrode lug is connected with the battery cell, and transmits a positive electrode signal to the testing equipment.

The structure is as follows: in the form of a plate, one end is connected to the first connection plate 41, and the other end is connected to the positive electrode channel of the test device.

Second busbar 2:

shape: the metal strip or the conductive plate with good conductivity is usually made of conductive red copper, and a first mounting hole is formed in the length direction of the conductive red copper.

The functions are as follows: and the negative electrode lug is connected with the battery cell, and a negative electrode signal is transmitted to the testing equipment.

The structure is as follows: similar to the first busbar 1, one end is connected to the second connection plate 42, and the other end is connected to the negative electrode channel of the test device.

The lengths of the first busbar 1 and the second busbar 2 can be adjusted according to actual requirements so as to adapt to battery cells and test equipment with different sizes, in an exemplary embodiment, the lengths of the first busbar 1 and the second busbar 2 are specifically 95mm long, 40mm wide and 6mm thick, the inner diameter is 75mm wide and 9.5mm, and the cross section area is 240 square millimeters so as to bear current required by test, so that the current-carrying capacity meets the test requirements.

The first busbar 1 and the second busbar 2 are tightly connected with the lugs of the battery cells through the first connecting plate 41 and the second connecting plate 42, so that stable electric connection is ensured. Meanwhile, the other ends of the battery signals are connected with positive and negative electrode channel wires of the testing equipment through the connecting interfaces, and the battery signals are transmitted to the testing equipment, so that the testing and monitoring of the battery performance are realized.

By using the first busbar 1 and the second busbar 2, reliable electrical connection between the battery cell and the test equipment can be realized, and the transmission and accuracy of the test signals are ensured. The design enables the test tool to have better stability, reliability and flexibility, and can meet the requirements of battery performance test.

Specifically, in the exemplary embodiment, the first positive copper bar 21, the second positive copper bar 22, the first negative copper bar 31, and the second negative copper bar 32 are key components in the battery test fixture for connecting the first busbar 1 and the second busbar 2 and providing electrical connection.

The specific description is as follows:

first positive electrode copper bar 21:

shape: is a long copper conductor.

The functions are as follows: the first busbar 1 is connected to transmit positive signals from the battery cells to the test equipment.

The structure is as follows: is made of copper material with excellent electric conduction performance, one side of the copper material is abutted against the first busbar 1 and is fixed on the first busbar 1 through a fixing component.

Second positive electrode copper bar 22:

shape: similar to the first positive electrode copper bar 21, it is also a long strip-shaped copper conductor.

The structure is as follows: also made of copper material with good electrical conductivity, one side of which is abutted against the first busbar 1 and fixed on the first busbar 1 by a fixing assembly.

First negative electrode copper bar 31:

shape: similar to the first positive electrode copper bar 21, it is a long strip-shaped copper conductor.

The functions are as follows: and the second busbar 2 is connected to transmit the negative electrode signal from the battery cell to the testing equipment.

The structure is as follows: is made of copper material, one side of the copper material is abutted against the second busbar 2 and is fixed on the second busbar 2 through a fixing component.

Second negative electrode copper bar 32:

shape: similar to the copper bars described above, the copper bars are elongated copper conductors.

The structure is as follows: also made of copper material, one side of which abuts against the second busbar 2 and is fixed to the second busbar 2 by means of a fixing assembly.

Further, in the exemplary embodiment, the maximum ranges of the first positive electrode copper bar 21, the second positive electrode copper bar 22, the first negative electrode copper bar 31 and the second negative electrode copper bar 32 are 700A, and in the testing process, the upper computer terminal can combine the first positive electrode copper bar 21 and the second positive electrode copper bar 22 into a group of channels, and combine the first negative electrode copper bar 31 and the second negative electrode copper bar 32 into a group of channels, so as to meet the requirements of the battery cell limit power test of the maximum range 1400A.

Through using first anodal copper bar 21, second anodal copper bar 22, first negative pole copper bar 31 and second negative pole copper bar 32, battery test fixture can realize the transmission and the connection of electric core positive negative pole signal for battery performance test is more reliable and accurate. The design improves the stability and reliability of connection and ensures the accuracy and safety of battery performance test.

Specifically, in the exemplary embodiment, the fixed assembly is an integral part of a battery test fixture, comprising the following components:

first bolt 51: the first positive electrode copper bar 21 is arranged in the first mounting hole of the first busbar 1 in a penetrating way and is used for fixing the first positive electrode copper bar 21 on the first busbar 1.

Second bolt 52: is inserted into the first mounting hole of the first busbar 1, and is used for fixing the second positive copper busbar 22 and the first busbar 1 on the first connecting plate 41.

Third bolt 53: and the first negative copper bar 31 is inserted into the second mounting hole of the second busbar 2 and is used for fixing the first negative copper bar 31 and the second busbar 2 on the second connecting plate 42.

Fourth bolt 54: and the second negative copper bar 32 is arranged in the second mounting hole of the second busbar 2 in a penetrating way and is used for fixing the second negative copper bar on the second busbar 2.

The function of these fixing assemblies is to fix the copper bars on the corresponding busbar or connection plate, so as to ensure the stability and reliability of the connection. The copper bars are matched with holes on the busbar or the connecting plate through a thread structure, and the copper bars can be firmly fixed in place by screwing bolts so as to maintain good electric connection. The fixing design improves the structural stability of the battery test tool, prevents loosening or disconnection, and ensures the transmission of test signals and the test accuracy.

Specifically, in the exemplary embodiment, the first positive electrode channel line and the second positive electrode channel line are respectively used for connecting the first positive electrode copper bar 21 and the second positive electrode copper bar 22, and transmitting positive electrode signals to the testing equipment, namely, the upper computer terminal; the first negative electrode channel line and the second negative electrode channel line are respectively used for connecting the first negative electrode copper bar 31 and the second negative electrode copper bar 32 and transmitting negative electrode signals to the computer terminal of the upper computer.

To sum up, compared with the prior art, the application can:

the reliability of the connection cell is improved: compared with the existing parallel connection method, the method has the advantages that the first busbar 1, the second busbar 2 and the fixing assembly are added, and the positive and negative electrode copper bars are firmly connected to the first busbar 1 and the second busbar 2 through the fixing assembly. The design reduces uneven contact and instability between the copper bar and the battery cell tab, improves the reliability of connection, and reduces the risk of deformation and falling of the battery cell tab, thereby improving the safety of the test.

Simplifying the connection process: the first connecting plate 41 and the second connecting plate 42 used in the scheme form an L-shaped plate-shaped structure, and are respectively fixed on the positive electrode lug and the negative electrode lug of the battery cell. The design simplifies the connection process, and only the connection plate and the battery cell tab are aligned and fixed without considering specific angles and shapes. This simplified connection procedure reduces the operational difficulty and the possibility of errors compared to existing methods.

The expandability of the test channel is improved: through using first female row 1 and the female row 2 of second in the battery test fixture, can be with a plurality of test channels parallelly connected, so, test equipment's range obtains increasing, can satisfy higher test demand, has also improved flexibility and the suitability of test, and this is especially important for the required heavy current when testing the limit power of battery.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present application, and is not intended to limit the present application, but although the present application has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or that equivalents may be substituted for part of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery test fixture, its characterized in that includes:

the fixing assembly is used for fixing the first positive electrode copper bar and the second positive electrode copper bar on the first busbar, and fixing the first negative electrode copper bar and the second negative electrode copper bar on the second busbar.

2. The battery test fixture of claim 1, further comprising:

3. The battery testing tool according to claim 2, wherein the first connecting plate and the second connecting plate are both formed into an L-shaped plate structure, two sides of the first connecting plate are respectively used for fixing the battery cell positive electrode tab and the first busbar, and two sides of the second connecting plate are respectively used for fixing the battery cell negative electrode tab and the second busbar.

4. The battery testing tool of claim 2, wherein the first busbar is adapted to abut the first connection plate and the second busbar is adapted to abut the second connection plate.

5. The battery test fixture of claim 1, wherein the first positive copper bar and the second positive copper bar are adapted to abut the first busbar, and wherein the first negative copper bar and the second negative copper bar are adapted to abut the second busbar.

6. The battery testing tool of any one of claims 2-4, wherein the securing assembly comprises:

7. The battery testing tool of any one of claims 2-4, wherein the securing assembly further comprises:

8. The battery test fixture of claim 6, wherein a first mounting hole is formed in the length direction of the first busbar, and the first bolt and the second bolt fix the first positive copper bar and the second positive copper bar through the first mounting hole.

9. The battery test fixture of claim 7, wherein a second mounting hole is formed in the second busbar in the length direction, and the third bolt and the fourth bolt fix the first negative copper bar and the second negative copper bar through the second mounting hole.

10. The battery test fixture of claim 1, further comprising: