Battery test fixture

Abstract

The utility model provides a battery test fixture which comprises a positive pole fixture, a negative pole fixture and a guide rail, the positive pole fixture and the negative pole fixture are respectively arranged on the guide rail, the positive pole fixture and the negative pole fixture can slide left and right on the guide rail, the positive pole fixture comprises a positive pole fixture base, a positive pole upper fixture, a positive pole connecting rod, a guide column and a positive pole contact piece device, the utility model has the beneficial effects that the guide rail grooves are arranged at the bottoms of the rear ends of the anode clamp and the cathode clamp, and the length and width of the guide rail grooves at the bottoms of the anode clamp and the cathode clamp can be adjusted at any time on the guide rails; the device has the advantages of high strength and convenient connection, and effectively avoids the short circuit problem caused by the contact between the battery and the positive contact piece device and the negative contact piece device; the battery test fixture is accurate and reliable in test data, capable of testing batteries of various models, convenient to test, good in interchangeability, capable of meeting the strength requirement and capable of testing the batteries of different types.

Description

Technical Field

[0001] The utility model relates to the technical field of a test fixture, in particular to a battery test fixture. Background Art

[0002] With the rapid development of the battery industry, the capacity of batteries is getting larger and larger, but the battery testing tools cannot adapt well to the batteries with larger and larger capacity. And when clamping the battery electrodes or tabs, if you are not careful, the electrodes may touch the clamp springs, screws and other metal parts on the clamp, which can easily lead to adverse results such as electrode short circuit. Therefore, a clamp that can effectively avoid short circuit and ensure effective contact with the battery electrodes is needed.

[0003] However, the clamp structure of the battery clamp formation machine currently on the market cannot meet the use requirements. When in use, multiple sets of clamps cannot be fixed together. They are scattered and disorganized, which is inconvenient for users to manage. In addition, after the battery is clamped, it is easy to loosen due to external forces. The installation method of the power-on clamps of the lithium battery capacity separation and formation testing equipment currently used in the industry is mostly screw-fixed. This installation method is inconvenient during production operations, and there are many structural parts and tools used, and the installation time is long.

[0004] Polymer battery, also known as polymer lithium battery, is a type of lithium-ion battery with many advantages such as high energy density, smaller size, ultra-thinness, light weight and high safety. In the production process of polymer batteries, it is often necessary to test the battery current or voltage to ensure the yield of polymer batteries.

[0005] The existing polymer battery test fixture has poor clamping performance on the battery tab, which affects the stability of the test process. In addition, the current sheet structure of the existing fixture is simple, and the detection efficiency of the current test is low, which is not conducive to high-current testing of the battery.

[0006] Chinese patent CN211603284U discloses a polymer battery test fixture, characterized in that it includes a first clamping member, a guide member, a voltage sheet, a hinge shaft, a current sheet and a second clamping member, the first clamping member and the voltage sheet are both connected to the guide member, the first clamping member and the second clamping member are both connected to the hinge shaft, the guide member and the voltage sheet are both arranged above the current sheet, the current sheet is arranged on the second clamping member, the surface of the current sheet is provided with end teeth, and the end of the voltage sheet is provided with a groove for abutting against the end teeth, which solves the problem that the first clamping member and the voltage sheet are both connected to the guide member, the first clamping member and the second clamping member are ... The holding parts are all connected to the hinge shaft, the guide part and the voltage sheet are arranged above the current sheet, and the current sheet is arranged on the second clamping part. When the front end of the first clamping part is pressed down, the voltage sheet and the current sheet can be pressed toward the second clamping part. The first clamping part and the second clamping part are stably buckled, thereby improving the stability of the current and voltage testing process. The surface of the current sheet is provided with end teeth, which can both pierce the oxide layer of the battery pole ear and improve the clamping degree of the battery pole ear, thereby improving the efficiency of the battery test. The end of the voltage sheet is provided with a groove for abutting with the end teeth, and the groove can support the end teeth of the current sheet, further improving the clamping degree of the battery pole ear, thereby promoting the improvement of the detection level of large current of the battery.

[0007] Chinese patent CN215218883U discloses a three-electrode lithium soft-pack battery fixture, which is characterized by comprising a first positive clamp device, a negative clamp device, a second positive clamp device, and a guide rail, wherein the first positive clamp device and the second positive clamp device are respectively arranged at both ends of the guide rail, and a negative clamp device is arranged between the first positive clamp device and the second positive clamp device, and round holes are arranged at both ends of the guide rail, which solves the problems of simple production and assembly, few structural parts and low cost, few tools, and simple and beautiful appearance; the first positive clamp device, the negative clamp device, and the second positive clamp device are provided with a slide groove at the bottom, and the slide grooves of the first positive clamp device, the negative clamp device, and the second positive clamp device can adjust the length and width of the slide grooves on the guide rail at any time; it has high strength and convenient connection, and effectively avoids the short circuit problem caused by the contact between the battery and metal parts such as the clamp spring; the test data of the three-electrode lithium soft-pack battery fixture is accurate and reliable, and it can complete the test of various types of batteries. Summary of the invention

[0008] The utility model aims to solve the above-mentioned technical problems and provides a novel battery testing fixture. A guide groove is provided at the bottom of the rear ends of the positive electrode fixture and the negative electrode fixture. The guide grooves at the bottom of the positive electrode fixture and the negative electrode fixture can adjust the length and width of the guide grooves at any time on the guide rails. The utility model has high strength and convenient connection, and effectively avoids the short circuit problem caused by the contact between the battery and the positive electrode contact piece device and the negative electrode contact piece device. The test data of the battery testing fixture is accurate and reliable, and it can complete the test of various types of batteries.

[0009] The utility model is realized by the following technical solutions:

[0010] A battery testing fixture comprises a positive electrode fixture, a negative electrode fixture and a guide rail, wherein the guide rail is respectively provided with a positive electrode fixture and a negative electrode fixture, and the positive electrode fixture and the negative electrode fixture can slide left and right on the guide rail, the positive electrode fixture comprises a positive electrode fixture base, a positive electrode upper fixture, a positive electrode connecting rod, a guide column and a positive electrode contact piece device, protrusions are provided on both sides of the middle part of the positive electrode fixture base, and round holes are provided on the protrusions, a positive electrode contact piece device is provided between the positive electrode fixture base and the positive electrode upper fixture, the positive electrode upper fixture is movably connected to the protrusions on both sides of the middle part of the positive electrode fixture base through the positive electrode connecting rod, and the positive electrode upper fixture and the positive electrode contact piece device are seamlessly connected and fastened to the positive electrode fixture base through the guide column.

[0011] Furthermore, a positive contact piece mounting position is provided at the front end of the positive electrode clamp base, a limit block is provided in the positive contact piece mounting position, a cylinder is provided in the middle of the positive electrode clamp base, a contact piece mounting groove is provided at the rear end of the positive electrode clamp base, a limit block is provided in the contact piece mounting groove, a guide rail groove is provided at the bottom of the rear end of the positive electrode clamp base, the guide rail groove at the bottom of the rear end of the positive electrode clamp base is embedded in the left side of the guide rail, and a protrusion is provided at the front end of the left side of the positive electrode clamp base.

[0012] As a further feature, a wiring hole is provided at the rear end of the positive electrode clamp base.

[0013] Furthermore, a contact piece mounting position is provided at the front end of the positive electrode clamp, and a card slot is provided on the outer wall of the positive electrode clamp. The card slot on the outer wall of the positive electrode clamp is embedded in the protrusion at the front end of the left side of the positive electrode clamp base, and is seamlessly fastened to the positive electrode clamp base.

[0014] As a further step, the positive contact sheet device includes a positive contact sheet bottom plate, a positive contact sheet gasket, a positive lower contact sheet, and a positive upper contact sheet. A groove is provided at the front end of the positive contact sheet bottom plate, a through hole is provided in the middle of the positive contact sheet bottom plate, and guide through holes are provided on both sides of the through hole. The positive contact sheet bottom plate is installed in the positive contact sheet installation position at the front end of the positive clamp base, the groove at the front end of the positive contact sheet bottom plate is embedded in the limit block, the guide through hole in the middle of the positive contact sheet bottom plate is installed on the cylinder in the middle of the positive clamp base, and the tail of the positive contact sheet bottom plate is embedded in the rear end of the positive clamp base. The positive electrode contact piece installation position is provided in the positive electrode contact piece gasket on the front end of the positive electrode contact piece bottom plate, the positive electrode contact piece gasket is provided with a positive lower contact piece, the positive upper contact piece is embedded in the contact piece installation position at the front end of the positive upper clamp, the positive lower contact piece and the positive upper contact piece are pressed and contacted with each other, the positive lower contact piece is provided with a pole ear position, the positive upper contact piece is provided with a pole ear position, the pole ear position on the positive lower contact piece and the pole ear position on the positive upper contact piece are pressed and contacted with each other, the pole ear positions on the positive lower contact piece and the positive upper contact piece are sawtooth-shaped and are manufactured by fine carving and milling technology.

[0015] Furthermore, the negative electrode clamp includes a negative electrode clamp base, a negative electrode upper clamp, a negative electrode connecting rod, a negative electrode guide column, and a negative electrode contact piece device. The negative electrode clamp base is provided with protrusions on both sides of the middle part, and the protrusions are provided with round holes. A negative electrode contact piece device is provided between the negative electrode clamp base and the negative electrode upper clamp. The negative electrode upper clamp is movably connected to the protrusions on both sides of the middle part of the negative electrode clamp base through the negative electrode connecting rod, and the negative electrode upper clamp and the negative electrode contact piece device are seamlessly connected and fastened to the negative electrode clamp base through the negative electrode guide column.

[0016] Furthermore, a negative contact piece mounting position is provided at the front end of the negative electrode clamp base, a negative limit block is provided in the negative electrode contact piece mounting position, a negative guide hole is provided in the middle part of the negative electrode clamp base, a negative contact piece mounting groove is provided at the rear end of the negative electrode clamp base, a negative limit block is provided in the negative electrode contact piece mounting position, a negative guide rail groove is provided at the bottom of the rear end of the negative electrode clamp base, the negative guide rail groove at the bottom of the rear end of the negative electrode clamp base is embedded in the right side of the guide rail, and a negative wiring hole is provided at the rear end of the negative electrode clamp base.

[0017] As a further step, the negative contact piece device comprises a negative contact piece bottom plate, a negative contact piece gasket, a negative lower contact piece, and a negative upper contact piece, the front end of the negative contact piece bottom plate is provided with a groove, the middle portion of the negative contact piece bottom plate is provided with a through hole, guide through holes are provided on both sides of the through hole, the negative contact piece bottom plate is installed in the negative contact piece installation position at the front end of the negative electrode clamp base, the groove at the front end of the negative electrode contact piece bottom plate is embedded in the negative limit block, the guide through hole in the middle portion of the negative electrode contact piece bottom plate is installed on the negative electrode cylinder in the middle portion of the negative electrode clamp base, the tail portion of the negative contact piece bottom plate is embedded in the contact piece installation groove at the rear end of the negative electrode clamp base, a negative contact piece gasket is provided on the front end of the negative contact piece bottom plate, a negative lower contact piece is provided on the negative contact piece gasket, the negative upper contact piece is embedded in the contact piece installation position at the front end of the negative electrode upper clamp, and the negative lower contact piece and the negative upper contact piece are pressed and contacted with each other.

[0018] As a further feature, a tab position is provided on the negative electrode lower contact sheet, and a tab position is provided on the negative electrode upper contact sheet. The tab position on the negative electrode lower contact sheet and the tab position on the negative electrode upper contact sheet are pressed and contacted with each other.

[0019] As a further feature, the tabs on the negative electrode lower contact sheet and the negative electrode upper contact sheet are sawtooth-shaped and are manufactured using a precision engraving and milling process.

[0020] The beneficial effects of the utility model are:

[0021] (1) The structure is simple, the design is ingenious, the space occupied is small, the cost is low, and the work efficiency is improved. The battery test fixture can test large current and large-size batteries, and can accommodate test fixtures of multiple batteries at the same time, which is convenient for testing, has good interchangeability, and can meet the strength requirements, so that different types of batteries can be tested;

[0022] (2) The positive electrode fixture and the negative electrode fixture on the battery test fixture are provided with guide rail grooves at the bottom of the rear end. The guide rail grooves at the bottom of the positive electrode fixture and the negative electrode fixture can be adjusted at any time on the guide rails. They have high strength and convenient connection, and effectively avoid the short circuit problem caused by the contact between the battery and the positive electrode contact piece device and the negative electrode contact piece device;

[0023] (3) The battery test fixture can produce accurate and reliable test data and can complete the test of various battery models;

[0024] (4) A wiring hole is provided at the rear end of the positive electrode fixture base or the negative electrode fixture base, which solves the problem of installing the wire and has a perfect appearance design;

[0025] (5) The tabs on the positive electrode lower contact sheet, the positive electrode upper contact sheet, the negative electrode lower contact sheet, and the negative electrode upper contact sheet are serrated in shape and are manufactured using a precision engraving and milling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the battery test fixture structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the explosion structure of the battery test fixture of the utility model;

[0028] Figure 3 This is a schematic diagram of the positive electrode clamp structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the explosion structure of the positive electrode clamp of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the negative electrode clamp of the utility model;

[0031] Figure 6 This is a schematic diagram of the explosion structure of the negative electrode clamp of the utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the positive electrode contact piece device of the utility model;

[0033] Figure 8 This is a schematic diagram of the explosion structure of the positive electrode contact piece device of the utility model;

[0034] Fig. 9 This is a schematic diagram of the structure of the negative electrode clamp base viewed from above of the utility model;

[0035] Fig.10 This is a schematic diagram of the positive electrode clamp base structure when viewed from above;

[0036] Figure numerals: 1, positive electrode fixture; 11, positive electrode fixture base; 110, positive electrode contact piece installation position; 111, convex block; 1110, round hole; 112, limit block; 113, cylinder; 114, contact piece installation groove; 115, guide groove; 116, protrusion; 117, wiring hole; 12, positive electrode upper fixture; 120, contact piece installation position; 121, positive electrode slot; 13, positive electrode connecting rod; 14, guide column; 15, positive electrode contact piece device; 150, positive electrode contact piece bottom plate; 1501, groove; 1502, through hole; 1503, guide through hole; 151, positive electrode contact piece gasket; 152, positive electrode lower contact piece; 153, positive electrode upper contact piece; 154, positive electrode 1. The pole ear position; 2. The negative electrode clamp; 21. The negative electrode clamp base; 210. The negative electrode contact piece installation position; 211. The negative electrode protrusion; 2110. The negative electrode circular hole; 212. The negative limit block; 213. The negative electrode cylinder; 214. The negative electrode contact piece installation groove; 215. The negative electrode guide groove; 216. The negative electrode protrusion; 217. The negative electrode wiring hole; 22. The negative electrode upper clamp; 220. The contact piece installation position; 221. The negative electrode slot; 23. The negative electrode connecting rod; 24. The negative electrode guide column; 25. The negative electrode contact piece device; 250. The negative electrode contact piece bottom plate; 251. The negative electrode contact piece gasket; 252. The negative electrode lower contact piece; 253. The negative electrode upper contact piece; 254. The negative pole ear position; 3. The guide rail. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] Refer to Figure 1-10As shown, a battery test fixture includes a positive electrode fixture 1, a negative electrode fixture 2, and a guide rail 3. The guide rail 3 is respectively provided with the positive electrode fixture 1 and the negative electrode fixture 2, and the positive electrode fixture 1 and the negative electrode fixture 3 can slide left and right on the guide rail 3. The positive electrode fixture 1 includes a positive electrode fixture base 11, a positive electrode upper fixture 12, a positive electrode connecting rod 13, a guide column 14, and a positive electrode contact piece device 15. The positive electrode fixture base 11 is provided with protrusions 111 on both sides of the middle part, and the protrusion 111 is provided with a circular hole 1110. The positive electrode fixture base 11 and the positive electrode upper fixture 12 are connected to each other. A positive contact piece device 15 is provided in between, and the positive upper clamp 12 is movably connected to the protrusions 111 on both sides of the middle part of the positive clamp base 11 through the positive connecting rod 13, and the positive upper clamp 12 and the positive contact piece device 15 are seamlessly connected and fastened to the positive clamp base 11 through the guide column 14, which solves the problem that the guide grooves at the bottom of the positive clamp and the negative clamp can be adjusted in length and width at any time on the guide rail; it has high strength and convenient connection, and effectively avoids the short circuit problem caused by the contact between the battery and the positive contact piece device and the negative contact piece device.

[0041] Preferably, a positive contact piece mounting position 110 is provided at the front end of the positive electrode clamp base 11, a limit block 112 is provided in the positive contact piece mounting position 110, a cylinder 113 is provided in the middle of the positive electrode clamp base 11, a contact piece mounting groove 114 is provided at the rear end of the positive electrode clamp base 11, a limit block 112 is also provided in the contact piece mounting groove 114, a guide rail groove 115 is provided at the bottom of the rear end of the positive electrode clamp base 11, the guide rail groove 115 at the bottom of the rear end of the positive electrode clamp base 11 is embedded in the left side of the guide rail 3, and a protrusion 116 is provided at the front end of the left side of the positive electrode clamp base 11.

[0042] Preferably, a wiring hole 117 is provided at the rear end of the positive electrode clamp base 11, which solves the problem of installing the wire and has a perfect appearance design.

[0043] Preferably, a contact piece mounting position 120 is provided at the front end of the positive electrode clamp 12, and a card groove 121 is provided on the outer wall of the positive electrode clamp 12 at the front end. The card groove 121 on the outer wall of the positive electrode clamp 12 at the front end is embedded in the protrusion 116 at the front end of the left side of the positive electrode clamp base 11, and is seamlessly fastened to the positive electrode clamp base 11.

[0044] Preferably, the positive contact sheet device 15 includes a positive contact sheet bottom plate 150, a positive contact sheet gasket 151, a positive lower contact sheet 152, and a positive upper contact sheet 153. A groove 1501 is provided at the front end of the positive contact sheet bottom plate 150, a through hole 1502 is provided in the middle of the positive contact sheet bottom plate 150, and guide through holes 1503 are provided on both sides of the through hole 1502. The positive contact sheet bottom plate 150 is installed in the positive contact sheet installation position 110 at the front end of the positive clamp base 11, the groove 1501 at the front end of the positive contact sheet bottom plate 150 is embedded in the limit block 112, the guide through hole 1503 in the middle of the positive contact sheet bottom plate 120 is installed on the cylinder 113 in the middle of the positive clamp base 11, and the tail of the positive contact sheet bottom plate 150 is embedded in the positive clamp base 11, a positive contact piece installation position 114 at the rear end of the positive contact piece bottom plate 150 is provided with a positive contact piece gasket 151 on the front end, a positive lower contact piece 152 is provided on the positive contact piece gasket 151, and the positive upper contact piece 153 is embedded in the contact piece installation position 120 at the front end of the positive upper clamp 12, the positive lower contact piece 152 and the positive upper contact piece 153 are pressed together and contacted with each other, a pole ear position 154 is provided on the positive lower contact piece 152, and a pole ear position 154 is provided on the positive upper contact piece 153, the pole ear position 154 on the positive lower contact piece 152 and the pole ear position 154 on the positive upper contact piece 153 are pressed together and contacted with each other, and the pole ear positions 154 on the positive lower contact piece 152 and the positive upper contact piece 153 are sawtooth-shaped and are made by fine carving and milling technology.

[0045] Preferably, the negative electrode clamp 2 includes a negative electrode clamp base 21, a negative electrode upper clamp 22, a negative electrode connecting rod 23, a negative electrode guide column 24, and a negative electrode contact piece device 25. The negative electrode clamp base 21 is provided with protrusions 211 on both sides of the middle part, and the protrusions 211 are provided with round holes 2110. A negative electrode contact piece device 25 is provided between the negative electrode clamp base 21 and the negative electrode upper clamp 22. The negative electrode upper clamp 22 is movably connected to the protrusions 211 on both sides of the middle part of the negative electrode clamp base 21 through the negative electrode connecting rod 23, and the negative electrode upper clamp 22 and the negative electrode contact piece device 25 are seamlessly connected and snapped onto the negative electrode clamp base 21 through the negative electrode guide column 24.

[0046] Preferably, a negative contact piece mounting position 210 is provided at the front end of the negative electrode clamp base 21, a negative limit block 212 is provided in the negative contact piece mounting position 210, a negative guide hole 213 is provided in the middle of the negative electrode clamp base 21, a negative contact piece mounting groove 214 is also provided at the rear end of the negative electrode clamp base 21, a negative limit block 212 is also provided in the negative contact piece mounting position 214, a negative guide rail groove 215 is provided at the bottom of the rear end of the negative electrode clamp base 21, the negative guide rail groove 215 at the bottom of the rear end of the negative electrode clamp base 21 is embedded in the right side of the guide rail 3, and a negative wiring hole 217 is provided at the rear end of the negative electrode clamp base 21.

[0047] Preferably, the negative contact piece device 25 comprises a negative contact piece bottom plate 250, a negative contact piece gasket 251, a negative lower contact piece 252, and a negative upper contact piece 253. A groove is provided at the front end of the negative contact piece bottom plate 250, a through hole is provided in the middle of the negative contact piece bottom plate 250, and guide through holes are provided on both sides of the through hole. The negative contact piece bottom plate 250 is installed in the negative contact piece installation position 214 at the front end of the negative clamp base 21, and the groove at the front end of the negative contact piece bottom plate 21 is embedded in the negative limit block 212. The guide through hole in the middle of the plate 250 is installed on the negative pole cylinder 213 in the middle of the negative pole clamp base 21, and the tail of the negative pole contact plate bottom plate 250 is embedded in the contact plate mounting groove 214 at the rear end of the negative pole clamp base 21, and a negative pole contact plate gasket 251 is provided on the front end of the negative pole contact plate bottom plate 21, and a negative pole lower contact plate 252 is provided on the negative pole contact plate gasket 251, and the negative pole upper contact plate 253 is embedded in the contact plate mounting position 220 at the front end of the negative pole upper clamp 22, and the negative pole lower contact plate 252 and the negative pole upper contact plate 253 are pressed and contacted with each other.

[0048] Preferably, a tab position 254 is provided on the negative electrode lower contact sheet 252, and a tab position 254 is provided on the negative electrode upper contact sheet 253. The tab position 254 on the negative electrode lower contact sheet 252 and the tab position 254 on the negative electrode upper contact sheet 253 are pressed and contacted with each other.

[0049] Preferably, the tabs 254 on the negative electrode lower contact sheet 252 and the negative electrode upper contact sheet 253 are serrated in shape and are manufactured using a precision engraving and milling process.

[0050] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also make appropriate changes and modifications to the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A battery test fixture, comprising a positive electrode fixture, a negative electrode fixture, and a guide rail, wherein the positive electrode fixture and the negative electrode fixture are respectively provided on the guide rail, and the positive electrode fixture and the negative electrode fixture can slide left and right on the guide rail, characterized in that: The positive electrode clamp comprises a positive electrode clamp base, a positive electrode upper clamp, a positive electrode connecting rod, a guide column, and a positive electrode contact piece device. The positive electrode clamp base is provided with protrusions on both sides of the middle part, and the protrusions are provided with round holes. A positive electrode contact piece device is provided between the positive electrode clamp base and the positive electrode upper clamp. The positive electrode upper clamp is movably connected to the protrusions on both sides of the middle part of the positive electrode clamp base through the positive electrode connecting rod, and the positive electrode upper clamp and the positive electrode contact piece device are seamlessly connected and buckled on the positive electrode clamp base through the guide column; the front end of the positive electrode clamp base A positive contact piece installation position is provided, a limit block is provided in the positive contact piece installation position, a cylinder is provided in the middle of the positive clamp base, a contact piece installation groove is provided at the rear end of the positive clamp base, a limit block is provided in the contact piece installation groove, a guide rail groove is provided at the bottom of the rear end of the positive clamp base, the guide rail groove at the bottom of the rear end of the positive clamp base is embedded in the left side of the guide rail, and a protrusion is provided at the front end of the left side of the positive clamp base; the positive contact piece device includes a positive contact piece bottom plate, a positive contact piece gasket, a positive lower contact piece, and a positive upper contact The positive contact sheet bottom plate has a groove at the front end, a through hole is provided in the middle of the positive contact sheet bottom plate, guide through holes are provided on both sides of the through hole, the positive contact sheet bottom plate is installed in the positive contact sheet installation position at the front end of the positive clamp base, the groove at the front end of the positive contact sheet bottom plate is embedded in the limit block, the guide through hole in the middle of the positive contact sheet bottom plate is installed on the cylinder in the middle of the positive clamp base, the tail of the positive contact sheet bottom plate is embedded in the contact sheet installation position at the rear end of the positive clamp base, and the positive contact sheet bottom plate is installed in the positive contact sheet installation position at the rear end of the positive clamp base. A positive contact sheet gasket is provided on the front end of the plate, a positive lower contact sheet is provided on the positive contact sheet gasket, the positive upper contact sheet is embedded in the contact sheet mounting position at the front end of the positive upper clamp, the positive lower contact sheet and the positive upper contact sheet are pressed together and in contact with each other, a pole ear position is provided on the positive lower contact sheet, a pole ear position is provided on the positive upper contact sheet, the pole ear position on the positive lower contact sheet and the pole ear position on the positive upper contact sheet are pressed together and in contact with each other, and the pole ear positions on the positive lower contact sheet and the positive upper contact sheet are serrated in shape.

2. The battery test fixture according to claim 1, characterized in that: A wiring hole is provided at the rear end of the positive electrode clamp base.

3. The battery test fixture according to claim 1, characterized in that: A contact piece mounting position is provided at the front end of the positive electrode upper clamp, and a card slot is provided on the outer wall of the positive electrode upper clamp. The card slot on the outer wall of the positive electrode upper clamp is embedded in the protrusion at the front end of the left side of the positive electrode clamp base, and is seamlessly fastened to the positive electrode clamp base.

4. The battery test fixture according to claim 1, characterized in that: The negative electrode clamp includes a negative electrode clamp base, a negative electrode upper clamp, a negative electrode connecting rod, a negative electrode guide column, and a negative electrode contact piece device. Bumps are provided on both sides of the middle part of the negative electrode clamp base, and round holes are provided on the bumps. A negative electrode contact piece device is provided between the negative electrode clamp base and the negative electrode upper clamp. The negative electrode upper clamp is movably connected to the bumps on both sides of the middle part of the negative electrode clamp base through the negative electrode connecting rod, and the negative electrode upper clamp and the negative electrode contact piece device are seamlessly connected and fastened to the negative electrode clamp base through the negative electrode guide column.

5. The battery test fixture according to claim 4, characterized in that: A negative contact piece mounting position is provided at the front end of the negative electrode clamp base, a negative limit block is provided in the negative contact piece mounting position, a negative guide hole is provided in the middle of the negative electrode clamp base, a negative contact piece mounting groove is also provided at the rear end of the negative electrode clamp base, a negative limit block is also provided in the negative contact piece mounting groove, a negative guide rail groove is provided at the bottom of the rear end of the negative electrode clamp base, the negative guide rail groove at the bottom of the rear end of the negative electrode clamp base is embedded in the right side of the guide rail, and a negative wiring hole is provided at the rear end of the negative electrode clamp base.

6. The battery test fixture according to claim 5, characterized in that: The negative electrode contact piece device comprises a negative electrode contact piece bottom plate, a negative electrode contact piece gasket, a negative electrode lower contact piece and a negative electrode upper contact piece, the front end of the negative electrode contact piece bottom plate is provided with a groove, the middle part of the negative electrode contact piece bottom plate is provided with a through hole, guide through holes are provided on both sides of the through hole, the negative electrode contact piece bottom plate is installed in the negative electrode contact piece installation position at the front end of the negative electrode clamp base, the groove at the front end of the negative electrode contact piece bottom plate is embedded in the negative limit block, the guide through hole in the middle part of the negative electrode contact piece bottom plate is installed on the negative electrode cylinder in the middle part of the negative electrode clamp base, the tail part of the negative electrode contact piece bottom plate is embedded in the contact piece installation groove at the rear end of the negative electrode clamp base, a negative electrode contact piece gasket is provided on the front end of the negative electrode contact piece bottom plate, a negative electrode lower contact piece is provided on the negative electrode contact piece gasket, the negative electrode upper contact piece is embedded in the contact piece installation position at the front end of the negative electrode upper clamp, and the negative electrode lower contact piece and the negative electrode upper contact piece are pressed and contacted with each other.

7. The battery test fixture according to claim 6, characterized in that: The negative electrode lower contact sheet is provided with a pole lug position, and the negative electrode upper contact sheet is provided with a pole lug position. The pole lug position on the negative electrode lower contact sheet and the pole lug position on the negative electrode upper contact sheet are pressed and contacted with each other.

8. The battery test fixture according to claim 7, characterized in that: The tabs on the negative electrode lower contact sheet and the negative electrode upper contact sheet are in a sawtooth shape.

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