Anti-sparking device for short-circuit safety test of lithium ion battery cell

Abstract

The utility model belongs to the technical field of battery detection auxiliary equipment, and particularly relates to a lithium ion cell short circuit safety test anti-sparking device, which comprises a first lifting positioning device, a second lifting positioning device and a distance adjusting device, the first lifting positioning device and the second lifting positioning device are arranged in a mirror image manner, and the distance adjusting device is arranged between the first lifting positioning device and the second lifting positioning device. The two movable ends of the spacing adjusting device are fixedly connected with the top of the first lifting positioning device and the top of the second lifting positioning device respectively, and through the structural arrangement, battery tabs are supported.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery testing auxiliary equipment, and in particular relates to a short-circuit safety test anti-sparking device for lithium-ion cells. Background Technology

[0002] The safety of lithium-ion batteries and battery packs is currently a primary concern for consumers in the energy storage market. During the design, development, certification, and testing of lithium-ion batteries and battery packs, a series of safety performance tests are required, including solutions to mitigate the risk of short-circuit fires. Existing technologies present challenges during cell short-circuit testing. These challenges include the risk of excessive weight on the short-circuit positive and negative electrode connections and overheating of the battery tabs due to overcurrent. This can lead to tab collapse, contact with and melting of the battery's blue film, and subsequent sparking when the tabs directly contact the battery casing. This can result in flammable gases being released from the battery during the short-circuit test, potentially causing fires or explosions and interrupting the test. Utility Model Content

[0003] The purpose of this invention is to provide a short-circuit safety testing device for lithium-ion cells to prevent sparking, aiming to solve the technical problems of fire and explosion caused by the testing process of lithium batteries in the prior art.

[0004] To achieve the above objectives, this utility model provides a short-circuit safety test anti-sparking device for lithium-ion battery cells, comprising a first lifting and positioning device, a second lifting and positioning device, and a spacing adjustment device. The first lifting and positioning device and the second lifting and positioning device are mirror images of each other, and the two movable ends of the spacing adjustment device are respectively fixedly connected to the tops of the first lifting and positioning device and the second lifting and positioning device.

[0005] Preferably, the spacing adjustment device includes a mounting plate, a first adjusting rod, a second adjusting rod, and an adjusting knob. One end of the first adjusting rod and the second adjusting rod are fixedly connected to the top of the first lifting positioning device and the second lifting positioning device, respectively. The first adjusting rod and the second adjusting rod are slidably connected to the bottom of the mounting plate. The adjusting knob passes through the mounting plate and is rotatably connected to the mounting plate. The adjusting knob is located between the first adjusting rod and the second adjusting rod. The first adjusting rod and the second adjusting rod are both engaged with the adjusting knob.

[0006] Preferably, the bottom of the mounting plate is provided with a first sliding groove, a second sliding groove and a connecting groove, one end of the first sliding groove and the second sliding groove respectively penetrates the mounting plate, the connecting groove is located between the first sliding groove and the second sliding groove and the connecting groove connects the first sliding groove and the second sliding groove, the first adjusting rod and the second adjusting rod are slidably disposed in the first sliding groove and the second sliding groove respectively, and the gear end of the adjusting knob is located in the connecting groove.

[0007] Preferably, the first lifting and positioning device includes a first positioning plate, a second positioning plate, and a first lifting device. One end of the first adjusting rod is fixedly connected to the top of the first positioning plate. The first positioning plate is located above the second positioning plate. The first lifting device is fixedly installed on the top of the second positioning plate. The first positioning plate is fixedly installed on the moving end of the first lifting device.

[0008] Preferably, the first lifting device includes a first adjusting column, a first connecting buckle, and two first guide rods. The two first guide rods are fixedly installed on the second positioning plate. The two ends of the first connecting buckle are respectively fixedly connected to the tops of the two first guide rods. The first adjusting column is located between the two first guide rods. The bottom of the first adjusting column abuts against the second positioning plate. The first adjusting column is rotatably connected to the first connecting buckle. The first positioning plate is slidably disposed on the two first guide rods, and the first adjusting column passes through the first positioning plate and is threadedly connected to the first positioning plate.

[0009] Preferably, a first lever is provided at the top of the first adjusting column, and the first lever is arranged perpendicular to the first adjusting column.

[0010] Preferably, the second lifting and positioning device includes a third positioning plate, a fourth positioning plate, and a second lifting device. One end of the second adjusting rod is fixedly connected to the top of the third positioning plate. The fourth positioning plate is located above the third positioning plate. The second lifting device is fixedly installed on the top of the third positioning plate. The third positioning plate is fixedly installed on the moving end of the second lifting device.

[0011] Preferably, the second lifting device includes a second adjusting column, a second connecting buckle, and two second guide rods. The two second guide rods are fixedly installed on the second positioning plate. The two ends of the second connecting buckle are respectively fixedly connected to the tops of the two second guide rods. The second adjusting column is located between the two second guide rods. The bottom of the second adjusting column abuts against the fourth positioning plate. The second adjusting column is rotatably connected to the second connecting buckle. The third positioning plate is slidably disposed on the two second guide rods, and the second adjusting column passes through the third positioning plate and is threadedly connected to the third positioning plate.

[0012] Preferably, a second lever is provided at the top of the second adjusting column, and the second lever is arranged perpendicular to the second adjusting column.

[0013] The above-mentioned technical solutions in the lithium-ion battery cell short-circuit safety testing anti-sparking device provided in this embodiment of the utility model have at least one of the following technical effects:

[0014] The lithium-ion battery cell short-circuit safety testing anti-sparking device of this utility model is assembled from a first lifting and positioning device, a second lifting and positioning device, and a spacing adjustment device. The first lifting and positioning device, the second lifting and positioning device, and the spacing adjustment device are all made of insulating materials to ensure absolute insulation during the testing process. The first and second lifting and positioning devices are respectively inserted below the battery tabs to support them. The two moving ends of the spacing adjustment device are fixedly connected to the first and second lifting devices, respectively. The spacing adjustment device adjusts the distance between the first and second lifting and positioning devices. During use, the first and second lifting and positioning devices are adjusted according to the height of the battery tabs of the product to be tested, allowing them to be positioned from both sides of the tabs. The spacing adjustment device is then used to adjust the distance between the first and second lifting and positioning devices. The first and second lifting positioning devices are pulled closer together and inserted under the battery tabs. The heights of the first and second lifting positioning devices are then adjusted so that the portions extending under the tabs abut against the bottom of the tabs and the battery casing, providing support. After assembly, testing is performed. This effectively avoids the problem of the external battery tabs collapsing due to excessive weight of the short-circuit positive and negative connection wires and overheating of the battery tabs during short-circuit testing. After testing, the first and second lifting positioning devices are lowered, and the spacing adjustment device is used to detach them from under the tabs. The device is then disassembled and reused. Through this structural design, the device in this application can be adapted to test batteries of different models and specifications, effectively avoiding tab position malfunctions during battery testing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A side view of the anti-sparking device for short-circuit safety testing of lithium-ion cells provided in an embodiment of this utility model.

[0017] Figure 2 A top view of the anti-sparking device for short-circuit safety testing of lithium-ion cells provided in this embodiment of the utility model.

[0018] Figure 3 The bottom view of the mounting plate of the anti-sparking device for short-circuit safety testing of lithium-ion cells provided in this embodiment of the utility model.

[0019] Figure 4 A rendering of the first lifting and positioning device of the anti-sparking device for short-circuit safety testing of lithium-ion cells provided in this embodiment of the utility model.

[0020] Figure 5 A rendering of the second lifting and positioning device of the anti-sparking device for short-circuit safety testing of lithium-ion cells provided in this embodiment of the utility model.

[0021] The following are the labeling elements in the figure:

[0022] 10—First lifting and positioning device; 11—First positioning plate; 12—Second positioning plate

[0023] 13—First lifting device; 20—Second lifting and positioning device; 21—Third positioning plate

[0024] 22—Fourth positioning plate; 23—Second lifting device; 30—Gap adjustment device

[0025] 31—Mounting plate; 32—First adjusting rod; 33—Second adjusting rod

[0026] 34—Adjustment knob; 131—First adjustment column; 132—First connecting buckle

[0027] 133—First guide rod; 231—Second adjusting column; 232—Second connecting buckle

[0028] 233—Second guide rod; 311—First slide groove; 312—Second slide groove

[0029] 313—Connecting slot. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below, with examples of the embodiments shown in the appendix. Figures 1-5 As shown, the same or similar reference numerals throughout denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0034] In one embodiment of this utility model, such as Figures 1-5 As shown, a short-circuit safety test anti-sparking device for lithium-ion battery cells is provided, including a first lifting and positioning device 10, a second lifting and positioning device 20 and a spacing adjustment device 30. The first lifting and positioning device 10 and the second lifting and positioning device 20 are arranged in a mirror image. The two moving ends of the spacing adjustment device 30 are fixedly connected to the top of the first lifting and positioning device 10 and the second lifting and positioning device 20, respectively.

[0035] The lithium-ion battery cell short-circuit safety testing anti-sparking device of this utility model is assembled from a first lifting and positioning device 10, a second lifting and positioning device 20, and a spacing adjustment device 30. The first lifting and positioning device 10, the second lifting and positioning device 20, and the spacing adjustment device 30 are made of insulating materials to ensure absolute insulation during the testing process. The first lifting and positioning device 10 and the second lifting and positioning device 20 are respectively inserted below the battery tabs to support them. The two moving ends of the spacing adjustment device 30 are fixedly connected to the first lifting device 10 and the second lifting device 20, respectively. The spacing between the first lifting and positioning device 10 and the second lifting and positioning device 20 is adjusted by the spacing adjustment device 30. During use, the first lifting and positioning device 10 and the second lifting and positioning device 20 are adjusted according to the height of the battery tabs of the product to be tested, so that the first lifting and positioning device 10 and the second lifting and positioning device 20 can be operated from both sides of the tabs to adjust the spacing. The adjustment device 30 pulls the first lifting and positioning device 10 and the second lifting and positioning device 20 closer together, extending them below the battery tabs. Then, the heights of the first lifting and positioning device 10 and the second lifting and positioning device 20 are adjusted so that the portions extending below the tabs can abut against the bottom of the tabs and the battery casing, thus providing support. After assembly, a test operation is performed. This effectively avoids the problem of the external battery tabs collapsing due to excessive weight of the short-circuit positive and negative terminal connection wires and overheating of the battery tabs during short-circuit testing. After the test is completed, the first lifting and positioning device 10 and the second lifting and positioning device 20 are lowered, and then the spacing adjustment device 30 is adjusted to remove the first lifting and positioning device 10 and the second lifting and positioning device 20 from below the tabs. The device is then disassembled and reused. Through the above structural design, the device in this application can be adapted to the testing of batteries of different models and specifications, effectively avoiding malfunctions in the tab position during battery testing.

[0036] In another embodiment of this utility model, such as Figures 1-3 As shown, the spacing adjustment device 30 includes a mounting plate 31, a first adjusting rod 32, a second adjusting rod 33, and an adjusting knob 34. One end of the first adjusting rod 32 and the second adjusting rod 33 are fixedly connected to the top of the first lifting and positioning device 10 and the second lifting and positioning device 20, respectively. The first adjusting rod 32 and the second adjusting rod 33 are slidably connected to the bottom of the mounting plate 31. The adjusting knob 34 passes through the mounting plate 31 and is rotatably connected to the mounting plate 31. The adjusting knob 34 is located between the first adjusting rod 32 and the second adjusting rod 33. The first adjusting rod 32 and the second adjusting rod 33 are engaged with the adjusting knob 34. The first adjusting rod 32 and the second adjusting rod 33 respectively drive the first lifting and positioning device 10 and the second lifting and positioning device 20 to move. Since the adjusting knob 34 is located between the first adjusting rod 32 and the second adjusting rod 33, it drives the first adjusting rod 32 and the second adjusting rod 33 to move in opposite directions.

[0037] In another embodiment of this utility model, such as Figures 1-3 As shown, the bottom of the mounting plate 31 is provided with a first sliding groove 311, a second sliding groove 312 and a connecting groove 313. One end of the first sliding groove 311 and the second sliding groove 312 respectively penetrates the mounting plate 31. The connecting groove 313 is located between the first sliding groove 311 and the second sliding groove 312 and connects the first sliding groove 311 and the second sliding groove 312. The first adjusting rod 32 and the second adjusting rod 33 are slidably disposed in the first sliding groove 311 and the second sliding groove 312 respectively. The gear end of the adjusting knob 34 is located in the connecting groove 313 to fix the movement trajectory of the first adjusting rod 32 and the second adjusting rod 33 and prevent the first adjusting rod 32 and the second adjusting rod 33 from being easily damaged and derailed.

[0038] In another embodiment of this utility model, such as Figures 1-2 and Figure 4 As shown, the first lifting and positioning device 10 includes a first positioning plate 11, a second positioning plate 12, and a first lifting device 13. One end of the first adjusting rod 32 is fixedly connected to the top of the first positioning plate 11. The first positioning plate 11 is located above the second positioning plate 12. The first lifting device 13 is fixedly installed on the top of the second positioning plate 12. The first positioning plate 11 is fixedly installed on the moving end of the first lifting device 13. The first positioning plate 11 and the second positioning plate 12 move closer or further apart under the action of the first lifting device 13 to support the bottom gap of the electrode tab. The top plane of the first positioning plate 11 is provided with several first protrusions to support the electrode tab, effectively reducing the contact area between the first positioning plate 11 and the electrode tab, which is beneficial for heat dissipation during the testing process.

[0039] In another embodiment of this utility model, such as Figures 1-2 and Figure 4 As shown, the first lifting device 13 includes a first adjusting column 131, a first connecting buckle 132, and two first guide rods 133. The two first guide rods 133 are fixedly installed on the second positioning plate 12. The two ends of the first connecting buckle 132 are fixedly connected to the tops of the two first guide rods 133 respectively. The first adjusting column 131 is located between the two first guide rods 133. The bottom of the first adjusting column 131 abuts against the second positioning plate 12. The first adjusting column 131 is rotatably connected to the first connecting buckle 132. The first positioning plate 11 is slidably disposed on the two first guide rods 133, and the first adjusting column 131 passes through the first positioning plate 11 and is threadedly connected to the first positioning plate 11. Under the positioning of the first connecting buckle 132, rotating the first adjusting column 131 drives the first positioning plate 11 to rise and fall, thereby adjusting the support state of the first lifting device 13 under the tab.

[0040] In another embodiment of this utility model, such as Figures 1-2 and Figure 4 As shown, a first lever is provided on the top of the first adjusting column 131. The first lever is perpendicular to the first adjusting column 131. By rotating the first lever, the height of the first positioning plate 11 can be easily adjusted by rotating the first adjusting column 131.

[0041] In another embodiment of this utility model, such as Figures 1-2 and Figure 5 As shown, the second lifting and positioning device 20 includes a third positioning plate 21, a fourth positioning plate 22, and a second lifting device 23. One end of the second adjusting rod 33 is fixedly connected to the top of the third positioning plate 21. The fourth positioning plate 22 is located above the third positioning plate 21. The second lifting device 23 is fixedly installed on the top of the third positioning plate 21. The third positioning plate 21 is fixedly installed on the moving end of the second lifting device 23. The third positioning plate 21 and the fourth positioning plate 22 move closer to or further away from each other under the action of the second lifting device 23 to support the bottom gap of the electrode tab. The top plane of the third positioning plate 21 is provided with several second protrusions to support the electrode tab, effectively reducing the contact area between the third positioning plate 21 and the electrode tab, which is conducive to heat dissipation during the detection process. The first protrusion and the second protrusion have the same height, ensuring that the two are fixed on the same horizontal plane.

[0042] In another embodiment of this utility model, such as Figures 1-2 and Figure 5 As shown, the second lifting device 23 includes a second adjusting column 231, a second connecting buckle 232, and two second guide rods 233. The two second guide rods 233 are fixedly installed on the second positioning plate 12. The two ends of the second connecting buckle 232 are fixedly connected to the tops of the two second guide rods 233 respectively. The second adjusting column 231 is located between the two second guide rods 233. The bottom of the second adjusting column 231 abuts against the fourth positioning plate 22. The second adjusting column 231 is rotatably connected to the second connecting buckle 232. The third positioning plate 21 is slidably disposed on the two second guide rods 233. The second adjusting column 231 passes through the third positioning plate 21 and is threadedly connected to the third positioning plate 21. Under the positioning of the second connecting buckle 232, rotating the second adjusting column 231 drives the third positioning plate 21 to rise and fall, thereby adjusting the support state of the second lifting device 23 below the tab.

[0043] In another embodiment of this utility model, such as Figures 1-2 and Figure 5 As shown, a second lever is provided on the top of the second adjusting column 231. The second lever is perpendicular to the second adjusting column 231. By rotating the second lever, the height of the third positioning plate 21 can be easily adjusted by rotating the second adjusting column 231.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A short-circuit safety testing and anti-sparking device for lithium-ion battery cells, characterized in that: It includes a first lifting and positioning device, a second lifting and positioning device, and a spacing adjustment device. The first lifting and positioning device and the second lifting and positioning device are arranged in a mirror image. The two moving ends of the spacing adjustment device are respectively fixedly connected to the top of the first lifting and positioning device and the second lifting and positioning device.

2. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 1, characterized in that: The spacing adjustment device includes a mounting plate, a first adjusting rod, a second adjusting rod, and an adjusting knob. One end of the first adjusting rod and the second adjusting rod are fixedly connected to the top of the first lifting and positioning device and the second lifting and positioning device, respectively. The first adjusting rod and the second adjusting rod are slidably connected to the bottom of the mounting plate. The adjusting knob passes through the mounting plate and is rotatably connected to the mounting plate. The adjusting knob is located between the first adjusting rod and the second adjusting rod. The first adjusting rod and the second adjusting rod are both engaged with the adjusting knob.

3. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 2, characterized in that: The bottom of the mounting plate is provided with a first sliding groove, a second sliding groove and a connecting groove. One end of the first sliding groove and the second sliding groove respectively penetrates the mounting plate. The connecting groove is located between the first sliding groove and the second sliding groove and connects the first sliding groove and the second sliding groove. The first adjusting rod and the second adjusting rod are slidably disposed in the first sliding groove and the second sliding groove respectively. The gear end of the adjusting knob is located in the connecting groove.

4. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 2, characterized in that: The first lifting and positioning device includes a first positioning plate, a second positioning plate, and a first lifting device. One end of the first adjusting rod is fixedly connected to the top of the first positioning plate. The first positioning plate is located above the second positioning plate. The first lifting device is fixedly installed on the top of the second positioning plate. The first positioning plate is fixedly installed on the moving end of the first lifting device.

5. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 4, characterized in that: The first lifting device includes a first adjusting column, a first connecting buckle, and two first guide rods. The two first guide rods are fixedly installed on the second positioning plate. The two ends of the first connecting buckle are respectively fixedly connected to the tops of the two first guide rods. The first adjusting column is located between the two first guide rods. The bottom of the first adjusting column abuts against the second positioning plate. The first adjusting column is rotatably connected to the first connecting buckle. The first positioning plate is slidably disposed on the two first guide rods, and the first adjusting column passes through the first positioning plate and is threadedly connected to the first positioning plate.

6. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 5, characterized in that: A first lever is provided at the top of the first adjusting column, and the first lever is arranged perpendicular to the first adjusting column.

7. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 4, characterized in that; The second lifting and positioning device includes a third positioning plate, a fourth positioning plate, and a second lifting device. One end of the second adjusting rod is fixedly connected to the top of the third positioning plate. The fourth positioning plate is located above the third positioning plate. The second lifting device is fixedly installed on the top of the third positioning plate. The third positioning plate is fixedly installed on the moving end of the second lifting device.

8. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 7, characterized in that: The second lifting device includes a second adjusting column, a second connecting buckle, and two second guide rods. The two second guide rods are fixedly installed on the second positioning plate. The two ends of the second connecting buckle are respectively fixedly connected to the tops of the two second guide rods. The second adjusting column is located between the two second guide rods. The bottom of the second adjusting column abuts against the fourth positioning plate. The second adjusting column is rotatably connected to the second connecting buckle. The third positioning plate is slidably disposed on the two second guide rods, and the second adjusting column passes through the third positioning plate and is threadedly connected to the third positioning plate.

9. The anti-sparking device for short-circuit safety testing of lithium-ion cells according to claim 8, characterized in that: A second lever is provided at the top of the second adjusting column, and the second lever is arranged perpendicular to the second adjusting column.

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