Lithium battery high-voltage testing device
Through the design of the fixture base and high-voltage testing mechanism, the problem of contact between the lithium battery case and the cover plate affecting the accuracy of the test is solved, and the stability and efficiency are improved.
Patent Information
- Application Number
- CN202421727233.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the high-voltage test of lithium batteries, the shell and cover may be partially in contact during the test, resulting in inaccurate test results, affecting operating efficiency and increasing costs.
The fixture base and high-voltage testing mechanism are used to fix the lithium battery case by positioning the stop and insulating spacer to ensure that the shell body is spaced from the cover plate. The negative electrode and positive electrode probe are used to connect the negative electrode column and positive electrode column or case of the lithium battery respectively to avoid contact influence.
It ensures the stability and accuracy of the test, simplifies the test process, improves production efficiency and reduces costs.
Smart Images
Figure CN223051473U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery testing equipment, in particular to a high-voltage testing device for lithium batteries. Background Technique
[0002] The high-voltage testing of lithium batteries after being put into the shell is a testing method used to detect the insulation performance of assembled lithium batteries after installing the shell. During the test, a certain voltage is applied between the electrodes and the shell of the lithium battery, and then the resistance is measured to detect whether there is a leakage phenomenon. However, after the core package of the lithium battery is put into the shell, the cover plate is not pressed into the shell, and the cover plate and the shell are in a separated state. During the high-voltage short-circuit test, to ensure good probe contact, the probe needs to travel and press tightly against the electrode of the lithium battery. At this time, there is a situation where the probe may push the electrode and the cover plate towards the shell, resulting in partial contact between the cover plate and the edge of the shell opening. Eventually, it causes the tester to misjudge and scrap the battery, affecting the accuracy of the test, and also increasing the cost caused by product rework and affecting the operation efficiency. Content of the Utility Model
[0003] The purpose of the utility model is to provide a high-voltage testing device for lithium batteries, which can effectively avoid partial contact between the shell body and the cover plate of the lithium battery shell during the test, affecting the test result, and ensure the accuracy of the test.
[0004] To achieve this purpose, the utility model adopts the following technical solutions:
[0005] Provide a high-voltage testing device for lithium batteries, including a fixture base and a high-voltage testing mechanism. The fixture base includes a bottom plate and several positioning blocks. The shell of the lithium battery includes a shell body and a cover plate. All the positioning blocks surround to form a first limiting groove for restricting the shell. An insulating partition is arranged in the first limiting groove, and the partition is arranged between the shell body and the cover plate; the high-voltage testing mechanism is arranged on one side of the fixture base, and the high-voltage testing mechanism includes a negative probe connected to the negative electrode column of the lithium battery and a positive probe connected to the positive electrode column or the shell of the lithium battery.
[0006] In one embodiment, a second limiting groove is recessed on the bottom plate, the second limiting groove is located in the first limiting groove, and part of the partition is inserted into the second limiting groove.
[0007] In one embodiment, the partition includes a connecting portion and a clamping strip. The connecting portion is inserted into the second limiting groove, and the clamping strip is connected and arranged on one side of the connecting portion. The clamping strip is arranged between the shell body and the cover plate.
[0008] In one embodiment, one end of each side of the card strip, which is away from the connecting portion, is flush with one end of the housing body and / or the cover plate that is away from the bottom plate.
[0009] In one embodiment, an insulating layer is provided on the outer surface of the partition member.
[0010] In one embodiment, the positioning stop block includes a first stop block connected to the bottom plate. The first stop block is disposed on one side of the bottom plate close to the second limiting groove. The first stop block and the partition member are spaced apart to form a third limiting groove for restricting the cover plate.
[0011] In one embodiment, the positioning stop block further includes a second stop block connected to the bottom plate. The second stop block is disposed on the side of the bottom plate away from the second limiting groove. The second stop block and the partition member are spaced apart to form a fourth limiting groove for restricting the housing body.
[0012] In one embodiment, the second stop block includes a first baffle and a second baffle connected at an angle. Both the first baffle and the second baffle are connected to the bottom plate. The first baffle and the second baffle respectively abut against two adjacent side surfaces of the housing body. Among them, the first baffle abuts against the side surface of the housing body away from the cover plate, and the second baffle abuts against the adjacent side surface of the housing body on the side away from the cover plate.
[0013] In one embodiment, the positioning stop block further includes a third stop block connected to the bottom plate. The third stop block is disposed on both sides of the housing along the first direction.
[0014] In one embodiment, the positive probe includes a first probe and a second probe. The first probe and the second probe are respectively connected in parallel with the positive electrode post of the lithium battery and the housing.
[0015] Advantages of the present utility model:
[0016] A high-voltage test device for a lithium battery according to the present utility model realizes positioning and fixing the housing on the fixture base by placing the housing of the lithium battery on the fixture base and forming a first limiting groove for restricting the housing by surrounding with a plurality of positioning stop blocks, ensuring the fixing stability of the housing on the fixture base, thereby ensuring the connection stability between the positive probe and the negative probe of the high-voltage test mechanism and the lithium battery or the housing during the test, and finally ensuring the stability of the overall test and the test accuracy. Among them, during the test, the negative probe of the high-voltage test mechanism is connected to the negative electrode post of the lithium battery, and the positive probe is connected to the positive electrode post of the lithium battery to perform a core package short-circuit test on the lithium battery. The negative probe of the high-voltage test mechanism is connected to the negative electrode post of the lithium battery, and the positive probe is connected to the lithium battery and the housing to perform a housing short-circuit test on the lithium battery.
[0017] Furthermore, an insulating partition is provided in the first limiting groove. The partition is arranged between the housing body and the cover plate so as to keep a gap between the cover plate and the housing body during the test, thereby effectively avoiding the possibility of contact between the housing body and the cover plate and affecting the test results, and ensuring the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of a lithium battery high-voltage test device in one embodiment;
[0019] Figure 2 is a schematic structural diagram of the cooperation between the housing and the fixture base in one embodiment;
[0020] Figure 3 is a schematic structural diagram of the fixture base in one embodiment;
[0021] Figure 4 is a schematic cross-sectional view of the housing placed in the fixture base in one embodiment;
[0022] Figure 5 is Figure 4 an enlarged structural diagram of part A in
[0023] Figure 6 is a schematic cross-sectional view of the fixture base in one embodiment;
[0024] Figure 7 is a schematic cross-sectional view of the fixture base (with partition) in one embodiment;
[0025] Figure 8 is Figure 7 an enlarged structural diagram of part B in
[0026] In the figure:
[0027] 100. Fixture base; 110. Bottom plate; 111. Second limiting groove; 120. First limiting groove; 130. Positioning block; 131. First block; 132. Second block; 1321. First baffle; 1322. Second baffle; 133. Third block; 134. Wiring gap; 140. Partition; 141. Connecting part; 142. Card strip; 150. Third limiting groove; 160. Fourth limiting groove; 200. High-voltage test mechanism; 210. Negative probe; 220. Positive probe; 221. First probe; 222. Second probe; 300. Housing; 310. Housing body; 320. Cover plate; 330. Core package; 340. Negative electrode post; 350. Positive electrode post. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] The following further describes the present utility model in detail in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.
[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0031] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0032] Such as Figures 1 to 8As shown in the figure, a high-voltage testing device for a lithium battery according to this embodiment includes a fixture base 100 and a high-voltage testing mechanism 200. The fixture base 100 includes a bottom plate 110 and a plurality of positioning blocks 130. The housing 300 of the lithium battery includes a body 310 and a cover plate 320. All the positioning blocks 130 surround to form a first limiting groove 120 for restricting the housing 300. An insulating partition member 140 is arranged in the first limiting groove 120, and the partition member 140 is arranged between the body 310 and the cover plate 320; the high-voltage testing mechanism 200 is arranged on one side of the fixture base 100. The high-voltage testing mechanism 200 includes a negative probe 210 connected to the negative electrode post 340 of the lithium battery and a positive probe 220 connected to the positive electrode post 350 or the housing 300 of the lithium battery.
[0033] In this embodiment, by placing the housing 300 of the lithium battery on the fixture base 100 and surrounding it with a plurality of positioning blocks 130 to form a first limiting groove 120 for restricting the housing 300, the housing 300 is positioned and fixed on the fixture base 100, ensuring the fixing stability of the housing 300 on the fixture base 100, thereby ensuring the connection stability between the positive probe 220 and the negative probe 210 of the high-voltage testing mechanism 200 and the core package 330 or the housing 300 of the lithium battery during the testing process, ultimately ensuring the stability of the overall test and the accuracy of the test. Among them, during the test, the negative probe 210 of the high-voltage testing mechanism 200 is connected to the negative electrode post 340 of the lithium battery, and the positive probe 220 is connected to the positive electrode post 350 of the lithium battery to perform a short-circuit test on the core package 330 of the lithium battery. The negative probe 210 of the high-voltage testing mechanism 200 is connected to the negative electrode post 340 of the lithium battery, and the positive probe 220 is connected to the lithium battery and the housing 300 to perform a short-circuit test on the housing 300 of the lithium battery.
[0034] Furthermore, an insulating partition member 140 is arranged in the first limiting groove 120, and the partition member 140 is arranged between the body 310 and the cover plate 320, so as to keep the cover plate 320 and the body 310 spaced apart during the testing process, effectively avoiding the possibility of contact between the body 310 and the cover plate 320 and affecting the test results, and ensuring the accuracy of the test.
[0035] In one embodiment, a second limiting groove 111 is recessed on the bottom plate 110. The second limiting groove 111 is located in the first limiting groove 120, and a part of the partition member 140 is inserted into the second limiting groove 111. The second limiting groove 111 is used to limit and fix the partition part, ensuring the stability of the partition member 140, so as to ensure the stability of the partition of the body 310 and the cover plate 320 by the partition member 140, ensuring that the body 310 and the cover plate 320 can be kept separated under the partition of the partition member 140 to avoid affecting the test results, and ensuring the stability and accuracy of the test.
[0036] In one embodiment, the barrier member 140 includes a connecting portion 141 and a clamping strip 142. The connecting portion 141 is inserted into the second limiting groove 111. The clamping strip 142 is connected to one side of the connecting portion 141. The clamping strip 142 is disposed between the shell body 310 and the cover plate 320. The clamping strip 142 effectively realizes the barrier effect between the cover plate 320 and the shell body 310.
[0037] Furthermore, both sides of the clamping strip 142 extend upward along one end away from the connecting portion 141, and are flush with one end of the shell body 310 and / or the cover plate 320 away from the bottom plate 110, or are slightly higher than one end of the shell body 310 and / or the cover plate 320 away from the bottom plate 110, so that both sides of the clamping strip 142 extending away from the connecting portion 141 are completely blocked between the shell body 310 and the cover plate 320, thereby effectively avoiding the possibility of contact between the shell body 310 and the cover plate 320, achieving the effect of complete isolation and insulation, which is beneficial to ensuring the accuracy of the test results.
[0038] In one embodiment, an insulating layer (not shown) is provided on the outer surface of the barrier 140. In this embodiment, the insulating layer is an insulating ceramic layer (not shown), which effectively isolates the possibility of electrical conduction between the shell body 310 and the cover plate 320, thereby achieving an insulating effect, thereby effectively preventing the conduction between the shell body 310 and the cover plate 320 from affecting the test results. In actual operation, the material and structure of the insulating layer are not limited to the insulating ceramic layer described above in this embodiment, and insulating layers of other materials or structures may also be used, as long as the spacing effect of the card strip 142 on the shell body 310 and the cover plate 320 can be further improved. Such designs all fall within the protection scope of the present utility model.
[0039] In one embodiment, the positioning block 130 includes a first block 131 connected to the bottom plate 110, the first block 131 is arranged on the bottom plate 110 at one side close to the second limiting groove 111, and the first block 131 and the barrier 140 are arranged at intervals to form a third limiting groove 150 for limiting the cover plate 320. The cover plate 320 is limited in the third limiting groove 150 by the first block 131 and the barrier 140, so as to maintain the stability of the cover plate 320 placed on the fixture base 100, effectively avoiding the displacement of the cover plate 320 during the high-voltage test operation and affecting the test results, thereby ensuring the accuracy of the test.
[0040] In one embodiment, the positioning block 130 further includes a second block 132 connected to the bottom plate 110, the second block 132 is disposed on a side of the bottom plate 110 away from the second limiting groove 111, and the second block 132 and the barrier 140 are spaced apart to form a fourth limiting groove 160 for limiting the shell body 310. The shell body 310 is limited in the fourth limiting groove 160 by the second block 132 and the barrier 140, so as to maintain the stability of the cover plate 320 placed on the fixture base 100, effectively avoiding the situation in which the cover plate 320 is displaced during the high-voltage test operation and affecting the test results, thereby ensuring the accuracy of the test.
[0041] In actual operation, the first limit groove 120 is divided into a third limit groove 150 and a fourth limit groove 160 by the first stop block 131, the second stop block 132 and the partition member 140, wherein the shell body 310 is limited in the third limit groove 150, and the cover plate 320 is limited in the fourth limit groove 160, and then the shell body 310 and the cover plate 320 are isolated by the partition member 140, so that the shell body 310 and the cover plate 320 are limited on the fixture base 100 while separating the shell body 310 from the cover plate 320, thereby ensuring the stability of the overall equipment and facilitating the accuracy of the test results.
[0042] In one embodiment, the second stopper 132 includes a first baffle 1321 and a second baffle 1322 connected at an angle, the first baffle 1321 and the second baffle 1322 are both connected to the bottom plate 110, and the first baffle 1321 and the second baffle 1322 respectively abut against two adjacent side surfaces of the shell body 310. The first baffle 1321 abuts against a side surface of the shell body 310 that is away from the cover plate 320, and the second baffle 1322 abuts against an adjacent side surface of the shell body 310 that is away from the cover plate 320. The second stopper 132 can not only be used to position and prevent the shell body 310 from being displaced along the side away from the cover plate 320, but also can be used to position and prevent the shell body 310 from being displaced along the first direction, thereby ensuring that the fixture base 100 positions and restricts the three positions of the shell body 310, and avoiding the possibility of the shell body 310 being separated from the fixture base 100 as much as possible, further improving the stability of the overall device, and thus ensuring the stability of the overall high-voltage test.
[0043] In actual operation, the angle between the first baffle 1321 and the second baffle 1322 is 90° to adapt to the positioning and restriction of a rectangular or cylindrical shell. Of course, in other embodiments, according to the shell 300 of different shapes, other angle values can also be used, so that the first baffle 1321 and the second baffle 1322 are respectively in contact with two adjacent sides of the shell 300, so as to achieve the positioning and restriction of the two directions of the shell 300, and improve the stability of the clamp base 100 on the shell 300. Such designs all belong to the protection scope of the present utility model.
[0044] In one embodiment, the positioning stop block 130 further includes a third stop block 133 connected to the bottom plate 110. The third stop block 133 is disposed on both sides of the housing 300 along the first direction to limit the displacement of the housing 300 in the first direction, thereby further improving the stability of the fixture base 100 in restricting the housing 300. In actual operation, the third stop block 133 is disposed on the side of the bottom plate 110 close to the second limiting groove 111, so that the third stop block 133 effectively blocks and limits the side of the housing body 310 close to the cover plate 320, preventing the housing body 310 from displacing or vibrating during the test, which may cause the housing body 310 to displace towards the cover plate 320 side, resulting in the situation where the housing body 310 contacts the cover plate 320 and affects the test structure.
[0045] In one embodiment, the bottom plate 110 is fixedly connected to several of the positioning stop blocks 130, which is beneficial to ensure the strength and stability of the overall structure of the fixture base 100. In actual operation, according to the specifications of the housing 300 of different specifications of lithium batteries, the fixture base 100 of corresponding specifications is obtained by integral injection molding, which can make the housing 300 fit with the fixture base 100, thereby ensuring that the housing 300 can be stably positioned in the fixture base 100 for high-voltage testing, and further effectively ensuring the stability of the equipment during the overall testing process, and finally ensuring the accuracy and stability of the test results. Moreover, the structure of the fixture base 100 in this device is simple, the integral molding process is simple, and it is also beneficial to reduce the production cost.
[0046] In one embodiment, as Figure 1 shown, the positive electrode probe 220 includes a first probe 221 and a second probe 222. The first probe 221 and the second probe 222 are respectively connected in parallel with the positive electrode column 350 and the housing 300 of the lithium battery.
[0047] Specifically, in one test circuit, the negative electrode probe 210 is connected to the negative electrode column 340 of the lithium battery, and the first probe 221 is connected to the positive electrode column 350 of the lithium battery for short-circuit testing of the core package 330. In another test circuit, the negative electrode probe 210 is connected to the negative electrode column 340 of the lithium battery, and the second probe 222 is connected to the housing 300 for short-circuit testing of the housing 300. In actual operation, the above two test circuits are connected in parallel and do not affect each other, simplifying the two test processes in traditional operations into one test process, which is beneficial to improving production efficiency and reducing the investment in test equipment.
[0048] In actual operation, several positioning stop blocks 130 are spaced apart from each other to form a wiring gap 134 for connecting the second probe 222 to the housing 300, facilitating the operator to connect and wire the second probe 222 to the housing 300, which is beneficial to reducing the test difficulty and improving the test efficiency.
[0049] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. A lithium battery high voltage testing device, characterized in that: include: A clamp base (100), the clamp base (100) comprising a bottom plate (110) and a plurality of positioning blocks (130), the housing (300) of the lithium battery comprising a housing (310) and a cover plate (320), all of the positioning blocks (130) surrounding a first limiting groove (120) for limiting the housing (300), an insulating barrier (140) being arranged in the first limiting groove (120), and the barrier (140) being arranged between the housing (310) and the cover plate (320); A high voltage testing mechanism (200) is provided on one side of the fixture base (100), and comprises a negative electrode probe (210) connected to the negative electrode column (340) of the lithium battery and a positive electrode probe (220) connected to the positive electrode column (350) of the lithium battery or the housing (300).
2. The lithium battery high voltage testing device according to claim 1, characterized in that: A second limiting groove (111) is formed in a recess on the bottom plate (110), the second limiting groove (111) is located in the first limiting groove (120), and the barrier member (140) is partially inserted in the second limiting groove (111).
3. The lithium battery high voltage testing device according to claim 2, characterized in that: The barrier member (140) comprises a connecting portion (141) and a clamping strip (142); the connecting portion (141) is inserted into the second limiting groove (111); the clamping strip (142) is connected to one side of the connecting portion (141); and the clamping strip (142) is arranged between the shell body (310) and the cover plate (320).
4. The lithium battery high voltage testing device according to claim 3, characterized in that: One end of both sides of the clamping strip (142) facing away from the connecting portion (141) is flush with one end of the shell body (310) and / or the cover plate (320) facing away from the bottom plate (110).
5. The lithium battery high voltage testing device according to claim 3 or 4, characterized in that: An insulating layer is provided on the outer surface of the barrier member (140).
6. The lithium battery high voltage testing device according to claim 2, characterized in that: The positioning block (130) comprises a first block (131) connected to the base plate (110); the first block (131) is arranged on a side of the base plate (110) close to the second limiting groove (111); the first block (131) and the barrier member (140) are spaced apart to form a third limiting groove (150) for limiting the cover plate (320).
7. The lithium battery high voltage testing device according to claim 2, characterized in that: The positioning block (130) further comprises a second block (132) connected to the bottom plate (110); the second block (132) is arranged on a side of the bottom plate (110) away from the second limiting groove (111); the second block (132) and the barrier member (140) are spaced apart to form a fourth limiting groove (160) for limiting the shell body (310).
8. The lithium battery high voltage testing device according to claim 7, characterized in that: The second baffle (132) comprises a first baffle plate (1321) and a second baffle plate (1322) connected at an angle, the first baffle plate (1321) and the second baffle plate (1322) are both connected to the bottom plate (110), the first baffle plate (1321) and the second baffle plate (1322) respectively abut against two adjacent side surfaces of the shell body (310), wherein the first baffle plate (1321) abuts against a side surface of the shell body (310) facing away from the cover plate (320), and the second baffle plate (1322) abuts against an adjacent side surface of the shell body (310) facing away from the cover plate (320).
9. The lithium battery high voltage testing device according to claim 1, characterized in that: The positioning block (130) further comprises a third block (133) connected to the bottom plate (110), and the third block (133) is arranged on both sides of the housing (300) along the first direction.
10. The lithium battery high voltage testing device according to any one of claims 1 to 4 and 6 to 9, characterized in that: The positive electrode probe (220) comprises a first probe (221) and a second probe (222), wherein the first probe (221) and the second probe (222) are respectively connected in parallel to the positive electrode column (350) of the lithium battery and the housing (300).