Edge voltage testing device for needle-type narrow-strip soft-package lithium battery

Abstract

The utility model discloses an edge voltage testing device for a needle-type narrow-strip soft-package lithium battery, and relates to the technical field of battery voltage testing. Comprising a bottom plate and a clamp, the clamp is connected with a battery cell, the outer side of the bottom plate is provided with a compression conduction test assembly, the bottom plate is slidably connected with a fixed seat, and the fixed seat is connected with a bayonet through a knife rest. According to the utility model, a transverse puncturing mode is adopted, the edge voltage is obtained by puncturing the side sealing edge of the battery, and the distance between the tab and the battery main body is not required.

Description

Technical Field

[0001] This utility model relates to the field of battery voltage testing technology, specifically to a needle-type narrow strip soft-pack lithium battery side voltage testing device. Background Technology

[0002] In the main process of manufacturing soft-pack lithium-ion batteries, the key step of the edge voltage testing process usually involves upper and lower copper blocks pressing down on the battery tabs, and two spikes vertically piercing the top seal edge of the battery to obtain the battery voltage. However, in the process of testing the edge voltage of needle-type narrow strip soft-pack batteries, the distance between the tabs and the battery body is very narrow, making it impossible to reserve a position for the spikes, and there is white glue at the base of the tabs, which prevents the spikes from piercing the top seal edge of the battery, so the edge voltage of the battery cannot be tested. Furthermore, when testing needle-type narrow strip soft-pack batteries, the distance between the tabs and the battery body is small, making the battery prone to short circuits and unable to be tested.

[0003] Therefore, it is necessary to provide a needle-type narrow strip soft-pack lithium battery side voltage testing device that uses a transverse puncture method to obtain the side voltage by puncturing the side seal of the battery, without requiring a specific distance between the tab and the battery body. Utility Model Content

[0004] The main purpose of this invention is to provide a needle-type narrow strip soft-pack lithium battery side voltage testing device to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A needle-type narrow strip soft-pack lithium battery side voltage testing device includes a base plate and a clamp. A battery cell is connected to the clamp. A pressure conduction test component is provided on the outer side of the base plate. A fixed seat is slidably connected to the base plate. A bayonet is connected to the fixed seat through a knife holder.

[0007] Furthermore, the pressure conduction test assembly includes an upper copper block and a lower copper block, which are respectively located on one side of the base plate. Both the upper copper block and the lower copper block are connected to a lifting drive assembly, which is used to drive the upper copper block and the lower copper block to move up and down.

[0008] Furthermore, a slide rail is fixedly connected to the base plate, and a slider is connected to the bottom end of the fixed seat, with the slider slidably connected to the slide rail.

[0009] Furthermore, a cylinder is connected to the base plate, and the power output end of the cylinder is connected to the fixed base.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The method of transverse puncture is adopted to obtain the side voltage by puncturing the side seal of the battery. There is no requirement for the distance between the tab and the battery body, which reduces the battery performance defects caused by the mismeasurement of traditional side voltage test and improves the battery yield. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a needle-type narrow strip soft-pack lithium battery side voltage testing device.

[0013] Figure 2 This is another schematic diagram of a needle-type narrow strip soft-pack lithium battery side voltage testing device.

[0014] Among them, 1-base plate; 2-pressing continuity test assembly; 21-upper copper block; 22-lower copper block; 3-slide rail; 4-slider; 5-fixed seat; 6-cylinder; 7-clamp; 8-battery cell; 9-tool holder; 10-bayonet. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example

[0017] Combination Figure 1-2 This utility model provides a needle-type narrow strip soft-pack lithium battery side voltage testing device, including a base plate 1 and a clamp 7. A battery cell 8 is connected to the clamp 7. A pressure conduction test component 2 is provided on the outer side of the base plate 1. A fixed seat 5 is slidably connected to the base plate 1. A bayonet 10 is connected to the fixed seat 5 through a knife holder 9. In this embodiment, two sets of fixed seats 5, knife holder 9 and bayonet 10 are provided.

[0018] The compression continuity test assembly 2 includes an upper copper block 21 and a lower copper block 22. The upper copper block 21 and the lower copper block 22 are respectively located on one side of the base plate 1, and the upper copper block 21 and the lower copper block 22 are respectively located on the upper and lower sides of the electrode tab. Both the upper copper block 21 and the lower copper block 22 are connected to a lifting drive assembly (not shown in the figure). The lifting drive assembly is used to drive the upper copper block and the lower copper block to rise and fall. The lifting drive assembly is prior art and will not be described in detail in this embodiment.

[0019] A slide rail 3 is fixedly connected to the base plate 1, and a slider 4 is connected to the bottom end of the fixed seat 5. The slider 4 is slidably connected to the slide rail 3.

[0020] A cylinder 6 is connected to the base plate 1, and the power output end of the cylinder 6 is connected to the fixed base 5.

[0021] When the device is working, it is controlled by PLC to connect the battery cell 8 to the clamp 7, control the upper copper block 21 and the lower copper block 22 to move and press the battery tabs and test the continuity. After the continuity is achieved, control the cylinder to drive the fixed seat 5 to slide, and the two bayonets 10 simultaneously pierce the top seal edge of the battery to test the side voltage.

[0022] This invention employs a transverse puncture method to obtain the side voltage by puncturing the side seal of the battery. It does not require a specific distance between the tab and the battery body, thus solving the side voltage testing problem for needle-type narrow-strip soft-pack batteries (distance between the tab and the battery body < 6mm). This reduces the possibility of battery performance defects caused by mismeasurements in traditional side voltage testing and improves battery yield.

[0023] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A pin type narrow strip soft package lithium battery edge voltage testing device, characterized in that, Including the bottom plate and clamp, the clamp is connected with the electric core, the outside of the bottom plate is provided with the compression lead-through test component, the bottom plate is connected with the fixed seat, the fixed seat is connected with the bayonet through the tool rest.

2. The edge voltage testing device for a needle type lithium battery according to claim 1, wherein The compression lead-through test component includes an upper copper block and a lower copper block, the upper copper block and the lower copper block are located on one side of the bottom plate respectively, and the upper copper block and the lower copper block are connected with lifting drive assemblies, the lifting drive assemblies are used to drive the upper copper block and the lower copper block to lift.

3. The edge voltage testing device for a needle type lithium battery according to claim 1, wherein The bottom plate is fixedly connected with a sliding rail, and the bottom end of the fixed seat is connected with a sliding block which is slidingly connected to the sliding rail.

4. The edge voltage testing device for a needle type lithium battery according to claim 1, wherein, The bottom plate is connected with a gas cylinder, and the power output end of the gas cylinder is connected with the fixed seat.

Images