A test fixture for aluminum-cased battery cells OCV

Abstract

This utility model relates to the field of lithium battery testing equipment and discloses an aluminum-cased battery cell OCV testing fixture. Its features include: a base with a positioning component for fixing the battery cell; a guide post vertically mounted on the base; a fixing plate fixedly mounted on the guide post; a push plate slidably mounted on the guide post; a positive electrode probe group and a negative electrode probe group mounted on the push plate; and a pusher component on the fixing plate for controlling the push plate's up-and-down movement along the guide post. This utility model features improved testing efficiency and strong versatility. Furthermore, the test is completed by pressing the probes down using a cylinder, ensuring good contact and stable operation.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery testing equipment, and in particular to an aluminum-cased battery cell OCV testing fixture. Background Technology

[0002] In the production and application of aluminum-cased battery cells, accurate measurement of the cell's open-circuit voltage (OCV) is crucial for evaluating cell performance, quality, and subsequent process control and quality management. Currently, existing OCV testing fixtures on the market have several shortcomings when testing aluminum-cased battery cells. For example, the connection stability with the aluminum-cased battery cell is poor, easily leading to poor contact and affecting the accuracy of test results; some fixtures have complex structural designs, are inconvenient to operate, and have high maintenance costs; furthermore, they also have limitations in testing efficiency and versatility, failing to meet the needs of large-scale production testing and various models of aluminum-cased battery cells. Therefore, it is necessary to design a fixture specifically for OCV testing of aluminum-cased battery cells to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide an OCV testing fixture for aluminum-cased battery cells, which can stably connect to aluminum-cased battery cells, is easy to operate, improves testing accuracy, and has the characteristics of improving testing efficiency and strong versatility. At the same time, the test is completed by pressing down the probe with a cylinder, ensuring good contact and stable operation.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an aluminum-cased battery cell OCV testing fixture, characterized in that: it includes a base, a positioning component for fixing the battery cell is provided on the base, a guide post is vertically provided on the base, a fixing plate is fixedly provided on the guide post, a push plate is slidably provided on the guide post, a positive electrode probe group and a negative electrode probe group are provided on the push plate, and a push component for controlling the push plate to move up and down along the guide post is provided on the fixing plate.

[0005] By adopting the above technical solution, the base made of metal material has good mechanical strength and stability. The push-pull drive can stably and accurately drive the probe to press down, making close contact with the cell electrode, reducing poor contact, and improving the accuracy and reliability of test results.

[0006] A further feature of this invention is that the pushing component is a cylinder, the cylinder barrel of the cylinder is fixedly connected to the fixed plate, and the end of the piston rod of the cylinder is fixedly connected to the pushing plate.

[0007] A further feature of this invention is that two guide posts are provided, and the two guide posts are vertically slidably connected to both sides of the push plate.

[0008] A further feature of this invention is that the positioning component includes a positioning base plate and a positioning baffle, the positioning base plate is provided with a positioning groove for fixing the positioning baffle, and the positioning base plate and the positioning baffle are made of insulating material.

[0009] By adopting the above technical solution, a positioning base plate and a positioning baffle are set on the base to fix the battery cell. The shape and size of the positioning baffle match the aluminum-cased battery cell, which can ensure that the aluminum-cased battery cell remains stable during testing. The positioning base plate and the positioning baffle are made of a low-hardness insulating material, such as bakelite, which has good insulation properties while protecting the aluminum-cased battery cell from scratches.

[0010] A further feature of this invention is that the positive electrode probe group includes a positive electrode frame and positive electrode probes disposed on the positive electrode frame.

[0011] A further feature of this invention is that the negative electrode probe group includes a negative electrode frame and negative electrode probes disposed on the negative electrode frame.

[0012] A further feature of this invention is that the push plate has a positioning hole, and both the positive electrode frame and the negative electrode frame are provided with positioning plates. Both the positive electrode frame and the negative electrode frame are detachably connected to the positioning hole on the push plate through the positioning plate.

[0013] By adopting the above technical solution, the positive and negative probes are selected from commercially available standard test probes, which have good reliability and stability. The probes are made of highly conductive metal materials, and the height of the fixing plate on the guide post can be adjusted, so that the probes can make close contact with the positive and negative posts of the aluminum-cased battery cell, ensuring good electrical connection.

[0014] Both the positive and negative probes are electrically connected to the signal acquisition circuit to acquire the voltage signal of the aluminum-cased battery cell, process the signal, and transmit it to the display module, which can display the OCV value of the aluminum-cased battery cell.

[0015] The beneficial effects of this utility model are:

[0016] The design of the positioning and pushing components makes the installation and removal of aluminum-cased cells simple and quick. Simply place the aluminum-cased cell into the positioning component and adjust the pushing component to complete the electrode connection. No complicated operation steps are required, which greatly shortens the test preparation time for a single cell.

[0017] The spacing between the positive and negative probe groups is adjustable, which can adapt to cell testing with different electrode spacings and enhances the versatility of the tooling. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the positioning component on the base of this utility model.

[0021] Figure 3 This is a schematic diagram of the push plate structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the main structure of the push-press component of this utility model.

[0023] In the diagram, 1 is the base; 11 is the positioning base plate; 111 is the positioning groove; 12 is the positioning baffle; 3 is the guide post; 4 is the fixing plate; 5 is the push plate; 51 is the positioning hole; 52 is the positioning plate; 6 is the cylinder; 7 is the positive electrode frame; 71 is the positive electrode probe; 8 is the negative electrode frame; 81 is the negative electrode probe; and 9 is the battery cell. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Examples, such as Figure 1 As shown, an aluminum-cased battery cell OCV testing fixture includes a base 1, on which a positioning component for fixing the battery cell 9 is provided. A guide post 3 is vertically arranged on the base 1, and a fixing plate 4 is fixedly arranged on the guide post 3. A push plate 5 is slidably arranged on the guide post 3. A positive electrode probe 71 group and a negative electrode probe 81 group are arranged on the push plate 5. A push component is provided on the fixing plate 4 to control the push plate 5 to move up and down along the guide post 3.

[0026] The base 1, made of metal, has good mechanical strength and stability. The push-pull mechanism can stably and accurately drive the probe to press down, making close contact with the electrode of the cell 9, reducing poor contact and improving the accuracy and reliability of the test results.

[0027] like Figure 1 , Figure 4 As shown, the pushing component is a cylinder 6, the cylinder barrel of the cylinder 6 is fixedly connected to the fixed plate 4, and the end of the piston rod of the cylinder 6 is fixedly connected to the pushing plate 5.

[0028] like Figure 1 As shown, there are two guide posts 3, which are vertically slidably connected to both sides of the push plate 5.

[0029] like Figure 2 As shown, the positioning component includes a positioning base plate 11 and a positioning baffle 12. The positioning base plate 11 is provided with a positioning groove 111 for fixing the positioning baffle 12. The positioning base plate 11 and the positioning baffle 12 are made of insulating material.

[0030] A positioning base plate 11 and a positioning baffle 12 are provided on the base 1 to fix the battery cell 9. The shape and size of the positioning baffle 12 are matched with the aluminum-cased battery cell 9 to ensure that the aluminum-cased battery cell 9 remains stable during testing. The positioning base plate 11 and the positioning baffle 12 are made of a low-hardness insulating material, such as bakelite, which has good insulation properties while protecting the aluminum-cased battery cell 9 from scratches.

[0031] like Figure 3 As shown, the positive electrode probe 71 group includes a positive electrode frame 7 and positive electrode probes 71 disposed on the positive electrode frame 7.

[0032] like Figure 3 As shown, the negative electrode probe group 81 includes a negative electrode frame 8 and negative electrode probes 81 disposed on the negative electrode frame 8.

[0033] like Figure 3 As shown, the push plate 5 has a positioning hole 51, and both the positive electrode frame 7 and the negative electrode frame 8 are provided with positioning plates 52. The positive electrode frame 7 and the negative electrode frame 8 are detachably connected to the positioning hole 51 on the push plate 5 through the positioning plate 52.

[0034] The positive probe 71 and negative probe 81 are standard commercially available test probes, possessing good reliability and stability. The probes are made of highly conductive metal material, and the height of the fixing plate 4 on the guide post 3 can be adjusted, ensuring close contact between the probes and the positive and negative terminals of the aluminum-cased cell 9, guaranteeing a good electrical connection. Both the positive probe 71 and negative probe 81 are electrically connected to the signal acquisition circuit to acquire the voltage signal of the aluminum-cased cell 9, process the signal, and transmit it to the display module, which displays the OCV value of the aluminum-cased cell 9.

[0035] When using this aluminum-cased battery cell OCV testing fixture, first, adjust the positioning and pushing components according to the model and size of the aluminum-cased battery cell 9 to position it correctly and ensure that both the positive and negative probes 81 are in contact with the terminals of the battery cell 9. Then, place the aluminum-cased battery cell 9 within the positioning component of the fixture body. Next, activate the air supply to cylinder 6. The piston in cylinder 6 moves under air pressure, driving the pushing component to press down the positive and negative connection probes, making close contact with the positive and negative terminals of the aluminum-cased battery cell 9. At this time, the signal acquisition circuit of the voltage test module begins to acquire the voltage signal, processes it, and transmits it to the display module. The tester can read the OCV value of the aluminum-cased battery cell 9 on the display module to complete the test. After the test is completed, turn off the air supply. Cylinder 6 moves the probes upward, disengaging from the electrodes of the battery cell 9. Then, remove the battery cell 9 from the positioning component. If multiple batteries 9 need to be tested, repeat the above steps.

Claims

1. An aluminum shell battery cell OCV test tool, characterized in that: Includes a base (1), on which a positioning component for fixing a battery cell (9) is provided, a guide post (3) is vertically provided on the base (1), a fixing plate (4) is fixedly provided on the guide post (3), a push plate (5) is slidably provided on the guide post (3), a positive electrode probe (71) group and a negative electrode probe (81) group are provided on the push plate (5), and a push component is provided on the fixing plate (4) to control the push plate (5) to move up and down along the guide post (3). 2.The OCV test tool for aluminum shell battery cell according to claim 1, characterized in that: The pushing component is a cylinder (6), the cylinder barrel of the cylinder (6) is fixedly connected to the fixed plate (4), and the end of the piston rod of the cylinder (6) is fixedly connected to the pushing plate (5). 3.The OCV test tooling for an aluminum shell battery cell of claim 1, wherein: The guide post (3) is configured as two, and the two guide posts (3) are vertically slidably connected to both sides of the push plate (5).

4. The OCV test tool for aluminum shell battery cell according to claim 1, characterized in that: The positioning component includes a positioning base plate (11) and a positioning baffle (12). The positioning base plate (11) is provided with a positioning groove (111) for fixing the positioning baffle (12).

5. The aluminum-cased battery cell OCV testing fixture according to claim 1, characterized in that: The positive probe (71) group includes a positive electrode holder (7) and positive probes (71) disposed on the positive electrode holder (7).

6. The aluminum-cased battery cell OCV testing fixture according to claim 5, characterized in that: The negative electrode probe (81) group includes a negative electrode holder (8) and negative electrode probes (81) disposed on the negative electrode holder (8).

7. The aluminum-cased battery cell OCV testing fixture according to claim 6, characterized in that: The push plate (5) has a positioning hole (51), and the positive electrode frame (7) and the negative electrode frame (8) are both provided with positioning plates (52). The positive electrode frame (7) and the negative electrode frame (8) are detachably connected to the positioning hole (51) on the push plate (5) through the positioning plate (52).

8. The aluminum-cased battery cell OCV testing fixture according to claim 4, characterized in that: The positioning base plate (11) and positioning baffle (12) are made of insulating material.

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