Explosion-proof test box tool for lithium ion battery short circuit test
By adjusting the internal wires to a horizontal state through the support and clamping mechanism, the problem of lithium-ion battery terminal damage caused by copper plate external wires in the prior art is solved, and protection and stable connection for different battery models are achieved.
Patent Information
- Application Number
- CN202423091917.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In existing explosion-proof test chambers for short-circuit testing of lithium-ion batteries, the external copper plate wires, due to their heavy weight, cause lateral stress at the connection point with the battery terminals, resulting in damage to the terminals.
The system employs a support mechanism and a clamping mechanism in combination. The support mechanism adjusts the internal wire to a horizontal position, while the clamping mechanism provides stable clamping, preventing the internal wire from exerting lateral force on the pole.
It provides protection for the terminals of different battery models, preventing damage caused by internal wires during high-temperature short-circuit testing, and ensuring connection stability and safety.
Smart Images
Figure CN223650710U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electrical performance testing technology, and specifically relates to an explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries. Background Technology
[0002] Lithium-ion batteries, with their high energy density, low environmental pollution, and long cycle life, have become the preferred solution in the current power battery and energy storage battery market. To ensure the safety of lithium-ion batteries, they typically undergo rigorous short-circuit testing before leaving the factory. The battery's safety performance is comprehensively assessed by detecting fluctuations in surface temperature and checking for abnormal phenomena such as leakage, fire, or explosion during the short-circuit test, thus providing consumers with more reliable product assurance.
[0003] Existing lithium-ion battery short-circuit test explosion-proof test chamber (see) Figure 1 Each of its enclosures is connected to a certain length of positive and negative external wires. The front end of the copper plate-shaped external wires is connected to the positive and negative terminal connecting pieces of the battery under test, and then an explosion-proof test is performed.
[0004] The drawback of this type of explosion-proof box is that, due to the large overcurrent value during short-circuit testing, the positive and negative external wires used are actually made of copper plates to ensure sufficient load-bearing capacity. This means that they are quite heavy during testing. After the existing explosion-proof box is fixed to the connecting piece at the test battery with bolts and nuts, the large current during short-circuit testing will rapidly increase the temperature at the battery terminals. The high temperature reduces the stability and support capacity of the terminals and the connecting piece. Combined with the high weight of the copper plate external wires, this results in high lateral stress at the connection point between the external wires and the positive and negative battery terminals, which in turn causes the connecting piece to bend and damage the battery terminals.
[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content
[0006] The purpose of this utility model is to provide an explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries. The technical problem to be solved is as follows: existing test fixtures will damage the battery terminals during use.
[0007] The objective of this utility model can be achieved through the following technical solutions:
[0008] A fixture for an explosion-proof test chamber for short-circuit testing of lithium-ion batteries includes a bottom insulating plate. A battery to be tested is placed on one side of the top of the bottom insulating plate. A wire connector is installed at the terminal of the battery to be tested. A support mechanism is placed on one side of the top of the bottom insulating plate. A clamping mechanism is provided at the top of the support mechanism. An internal wire is installed between the wire connector and the clamping mechanism. The support mechanism is used to adjust the horizontal state of the internal wire. The clamping mechanism is used to stably clamp the internal wire. A voltage clamp is clamped on one side of the internal wire.
[0009] As a further embodiment of this utility model: the support mechanism includes a bottom support plate placed on the bottom insulating plate, a bottom column fixedly connected to the top of the bottom support plate, a sliding groove provided between both sides of the bottom column, a top column installed between the two sliding grooves, and a sliding strip fixedly connected to the inner side of the top column to fit the sliding groove, the sliding strip being slidably connected to the sliding groove on the adjacent side.
[0010] As a further embodiment of this utility model: a threaded cylinder is fixedly connected to the top of the bottom column, and a height adjustment screw is threadedly connected to the top of the threaded cylinder. The top of the height adjustment screw is rotatably connected to the inner side of the upper part of the top column. A right-angle bevel gear set is provided at the top of the height adjustment screw, and a height adjustment handle is installed on one side of the right-angle bevel gear set.
[0011] As a further embodiment of this utility model: the height adjustment handle is rotatably connected to the top of the top column, the right-angle bevel gear set includes a main bevel gear fixedly connected to one side of the height adjustment handle, the main bevel gear meshes with a secondary bevel gear, the main bevel gear and the secondary bevel gear are perpendicular to each other, and the secondary bevel gear is fixedly connected to the top of the height adjustment screw.
[0012] As a further embodiment of this utility model: the clamping mechanism includes a clamping base plate fixedly connected to the top of the support mechanism. The top of the clamping base plate is provided with two adjusting slides. A clamping seat is slidably connected between the two adjusting slides. The top of the clamping seat is provided with a limiting groove. A fixed clamping plate is fixedly connected to one side of the limiting groove. A movable clamping plate is slidably connected to the side of the limiting groove away from the fixed clamping plate. An adjusting screw is rotatably connected to one side of the limiting groove.
[0013] As a further embodiment of this utility model: the adjusting screw is threadedly connected to the bottom of the moving clamping plate, and an adjusting handle is fixedly connected to one side of the clamping seat. An adjusting groove is provided at the bottom of the clamping base plate, and a locking bolt is installed between the adjusting groove and the clamping seat.
[0014] The beneficial effects of this utility model are:
[0015] By installing a bottom insulating plate inside the explosion-proof box, the battery under test is placed on the bottom insulating plate. A support mechanism is placed on one side of the two terminals of the battery under test, and a clamping mechanism is fixedly connected to the top of the support mechanism. A copper plate internal wire is installed between the clamping mechanism and the top of the battery under test. When installing the internal wire, the height of the support mechanism is adjusted to make the internal wire horizontal, and the clamping mechanism clamps the internal wire on both sides of the horizontal internal wire. That is, before the external battery short circuit tester performs the formal short circuit test, the horizontality of the internal wire is adjusted to avoid the terminals being subjected to the oblique force of the internal wire when they are in a high-temperature and easily damaged state after the short circuit, thus achieving the protection of the battery terminals under test.
[0016] Furthermore, since the height adjustment of the support mechanism is stepless when rotating the height adjustment handle, and the clamping mechanism can achieve stable clamping of batteries with different terminal spacing by moving the clamping seat position and changing the position of the moving clamping plate, the technical advantage is that the tooling can maintain a horizontal and stable clamping function at the internal wires connected to the terminals when performing short circuit testing on batteries of different models. This enables short circuit detection protection for the terminals of various models of batteries under test, preventing them from being damaged by the copper plate internal wires. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings.
[0018] Figure 1 This is a structural diagram of existing technology;
[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 3 This is a half-sectional view of the support mechanism of this utility model;
[0021] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model.
[0022] In the diagram: 1. Explosion-proof box; 2. Battery under test; 3. Wire connector; 4. External wire; 5. Ventilation opening; 6. Box door; 7. Viewing window; 8. Bottom insulation plate; 9. Support mechanism; 91. Bottom support plate; 92. Bottom column; 93. Slide groove; 94. Top column; 95. Slide bar; 96. Threaded cylinder; 97. Height adjustment screw; 98. Right angle bevel gear set; 99. Height adjustment handle; 10. Clamping mechanism; 101. Clamping base plate; 102. Adjustment slide bar; 103. Clamping seat; 104. Limiting groove; 105. Fixed clamping plate; 106. Moving clamping plate; 107. Adjustment screw; 108. Adjustment handle; 109. Adjustment groove; 1010. Locking bolt; 11. Internal wire; 12. Voltage clamp. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0024] Figure 1 The existing technology involves placing a battery under test 2 inside an explosion-proof box 1. A wire connector 3 is installed at the terminal of the battery under test 2, and an external wire 4 is connected to the top of the wire connector 3. The external wire 4 extends through the wiring port at the bottom of the explosion-proof box 1 to the outside of the box 1. The explosion-proof box 1 is also equipped with a ventilation opening 5 and a viewing window 7 to provide necessary heat dissipation and monitoring for testing. A door 6 is located on the other side of the external wire 4. When connecting the external wire 4, because the explosion-proof box 1 is a general-purpose device, the height of the lead-in port of the external copper plate-shaped external wire 4 is fixed. Since the wire connector 3 on one side of the battery under test 2 used to connect the external wire 4 is horizontal, when testing batteries under test 2 at different heights, the angle between the external wire 4 and the wire connector 3 creates lateral pressure, resulting in lateral stress between the wire connector 3 and the terminal, which damages the terminal of the battery under test 2.
[0025] like Figures 2 to 4 As shown, a tooling for an explosion-proof test chamber for short-circuit testing of lithium-ion batteries includes a bottom insulating plate 8 installed inside an explosion-proof box 1. A battery 2 to be tested is placed on one side of the top of the bottom insulating plate 8. A wire connector 3 is installed at the terminal of the battery 2 to be tested. A support mechanism 9 is placed on one side of the top of the bottom insulating plate 8. A clamping mechanism 10 is provided at the top of the support mechanism 9. An internal wire 11 is installed between the wire connector 3 and the clamping mechanism 10. The support mechanism 9 is used to adjust the internal wire 11 to a horizontal state. The clamping mechanism 10 is used to stably clamp the internal wire 11. A voltage clamp 12 is clamped on one side of the internal wire 11.
[0026] It should be noted that this fixture is installed inside the explosion-proof box 1 in the existing technology. The internal wire 11 and the external wire 4 are both made of copper plate. Because the height needs to be adjusted inside the box, the voltage clamp 12 is used to lead the wire to the outside of the explosion-proof box 1 for testing. Specifically, when the battery under test 2 is tested, the voltage clamp 12 is connected to the battery short-circuit tester outside the explosion-proof box 1. The battery short-circuit tester includes a main body, a resistance box, and test software. Two wires are connected to the resistance box, and the ends of the two wires are connected to the voltage clamp 12. Then, the voltage clamp 12 is sent into the explosion-proof box 1 to clamp the two copper plate internal wires 11, thereby forming a short circuit between the resistance box, the battery under test 2, and the connected wires, so as to create a short-circuit test environment for the battery under test 2. In actual testing, when the battery under test 2 is short-circuited with the short-circuit tester, a large current of about 2000A can be generated. This current passes through the battery under test 2 and will generate high temperature at the terminal of the battery under test 2. At this time, the terminal is in a state of high temperature and easy damage.
[0027] The support mechanism 9 includes a bottom support plate 91 placed on the bottom insulation plate 8. The bottom support plate 91 is fixedly connected to the top of the bottom column 92. Slide grooves 93 are provided between the two sides of the bottom column 92. A top column 94 is installed between the two slide grooves 93. The inner side of the top column 94 is fitted with the slide groove 93 and fixedly connected to the slide bar 95. The slide bar 95 is slidably connected to the slide groove 93 on the adjacent side. A threaded cylinder 96 is fixedly connected to the top of the bottom column 92. The top of the threaded cylinder 96 is threadedly connected to the height adjustment screw 97. The top of the height adjustment screw 97 is rotatably connected to the upper inner side of the top column 94. A right-angle bevel gear set 98 is provided at the top of the height adjustment screw 97. A height adjustment handle 99 is installed on one side of the right-angle bevel gear set 98.
[0028] It should be noted that the height adjustment handle 99 passes through the top post 94 and connects to the right-angle bevel gear set 98, and is rotatably connected to the top of the top post 94. The right-angle bevel gear set 98 includes a main bevel gear fixedly connected to the height adjustment handle 99. The main bevel gear meshes with a secondary bevel gear. The main bevel gear and the secondary bevel gear are perpendicular to each other. The secondary bevel gear is fixedly connected to the top of the height adjustment screw 97. Specifically, when the height adjustment handle 99 is rotated, the rod part of the height adjustment handle 99 drives the main bevel gear to rotate, and then drives the secondary bevel gear that meshes with it perpendicularly to rotate. The rotation of the secondary bevel gear drives the height adjustment screw 97 connected at the bottom to rotate. With the sliding connection inside the top post 94 and the bottom post 92, the height of the top post 94 can be adjusted vertically, that is, the height of the support mechanism 9 can be adjusted, thereby adapting to the battery 2 poles of different heights. Moreover, this height adjustment is stepless and can be adjusted to any height within the vertical movement range of the height adjustment screw 97.
[0029] like Figure 2 and Figure 4As shown, the clamping mechanism 10 includes a clamping base plate 101 fixedly connected to the top of the top column 94. Two adjusting slides 102 are provided at the top of the clamping base plate 101. A clamping seat 103 is slidably connected between the two adjusting slides 102. A limiting groove 104 is provided at the top of the clamping seat 103. A fixed clamping plate 105 is fixedly connected to one side of the limiting groove 104. A movable clamping plate 106 is slidably connected to the side of the limiting groove 104 away from the fixed clamping plate 105. An adjusting screw 107 is rotatably connected inside the limiting groove 104. The adjusting screw 107 is threadedly connected to the bottom of the movable clamping plate 106, and an adjusting handle 108 is fixedly connected through the clamping seat 103 on one side. An adjusting groove 109 is provided at the bottom of the clamping base plate 101. A locking bolt 1010 is installed between the adjusting groove 109 and the clamping seat 103.
[0030] It should be noted that, due to the different distances between the terminals of different batteries 2 under test, the distance between the two inner wires 11 will differ after connecting the wire connector 3 and connecting the inner wire 11 at the top of the wire connector 3. Therefore, in order to maintain a stable clamping of the inner wire 11, it is necessary to first align it with one side. At this time, by unlocking the locking bolt 1010, the clamping seat 103 is pushed to slide on the adjusting slide bar 102 until the fixed clamping plate 105 is in contact with the copper plate side of the inner wire 11. Then, the adjusting handle 108 is rotated to control the clamping plate 106. Clamping the other side of the inner wire 11 completes the stable clamping of both sides of the inner wire 11. With the height adjustment of the support mechanism 9, the terminals of various types of batteries under test 2 can achieve horizontal support for the inner wire 11. The purpose is to avoid the inner wire 11 being obliquely connected to the wire connector 3 and exerting lateral pulling or pushing force on the terminal under high temperature testing conditions. Instead, the oblique force on the terminal is eliminated by the support force of the battery under test 2 and the support mechanism 9 when it is placed horizontally, thereby achieving protection of the terminal under different testing conditions of the battery under test 2.
[0031] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A fixture for an explosion-proof test chamber for short-circuit testing of lithium-ion batteries, comprising a bottom insulating plate (8), characterized in that, The battery to be tested (2) is placed on one side of the top of the bottom insulating plate (8). A wire connector (3) is installed at the terminal of the battery to be tested (2). A support mechanism (9) is placed on one side of the top of the bottom insulating plate (8). A clamping mechanism (10) is provided at the top of the support mechanism (9). An internal wire (11) is installed between the wire connector (3) and the clamping mechanism (10). The support mechanism (9) is used to adjust the horizontal state of the internal wire (11). The clamping mechanism (10) is used to stably clamp the internal wire (11). A voltage clamp (12) is clamped on one side of the internal wire (11).
2. The explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries according to claim 1, characterized in that, The support mechanism (9) includes a bottom support plate (91) placed on the bottom insulating plate (8). A bottom column (92) is fixedly connected to the top of the bottom support plate (91). A sliding groove (93) is provided between both sides of the bottom column (92). A top column (94) is installed between the two sliding grooves (93). A sliding strip (95) is fixedly connected to the inner side of the top column (94) to fit the sliding groove (93). The sliding strip (95) is slidably connected to the sliding groove (93) on the adjacent side.
3. The explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries according to claim 2, characterized in that, A threaded cylinder (96) is fixedly connected to the top of the bottom column (92). A height adjustment screw (97) is threadedly connected to the top of the threaded cylinder (96). The top of the height adjustment screw (97) is rotatably connected to the upper inner side of the top column (94). A right-angle bevel gear set (98) is provided at the top of the height adjustment screw (97). A height adjustment handle (99) is installed on one side of the right-angle bevel gear set (98).
4. The explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries according to claim 3, characterized in that, The height adjustment handle (99) is rotatably connected to the top of the top post (94). The right-angle bevel gear set (98) includes a main bevel gear fixedly connected to one side of the height adjustment handle (99). The main bevel gear meshes with a secondary bevel gear. The main bevel gear and the secondary bevel gear are perpendicular to each other. The secondary bevel gear is fixedly connected to the top of the height adjustment screw (97).
5. The explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries according to claim 1, characterized in that, The clamping mechanism (10) includes a clamping base plate (101) fixedly connected to the top of the support mechanism (9). The top of the clamping base plate (101) is provided with two adjusting slides (102). A clamping seat (103) is slidably connected between the two adjusting slides (102). The top of the clamping seat (103) is provided with a limiting groove (104). A fixed clamping plate (105) is fixedly connected to one side of the limiting groove (104). A movable clamping plate (106) is slidably connected to the side of the limiting groove (104) away from the fixed clamping plate (105). An adjusting screw (107) is rotatably connected to one side of the limiting groove (104).
6. The explosion-proof test chamber fixture for short-circuit testing of lithium-ion batteries according to claim 5, characterized in that, The adjusting screw (107) is threaded to the bottom of the moving clamp (106), and an adjusting handle (108) is fixedly connected to the clamping seat (103) on one side. An adjusting groove (109) is provided at the bottom of the clamping base plate (101), and a locking bolt (1010) is installed between the adjusting groove (109) and the clamping seat (103).