Thermal testing device for internal battery of lithium ion battery

Abstract

A lithium ion battery internal battery thermal test device disclosed by the present invention comprises a shell, the right side in the shell is fixedly connected with an infrared thermal imaging device, the right side outside the shell is fixedly connected with a display screen, the display screen and the infrared thermal imaging device are oppositely arranged, the shell is internally provided with a plurality of moving plates, and the moving plates are fixedly connected with the shell. The multiple movable plates are arranged in pairs, the movable plates in each group are oppositely arranged up and down, rotating rods are rotationally connected to the sides, close to each other, of the movable plates in each group, rotating plates are fixedly connected to the sides, away from the movable plates, of the rotating rods, and fixing rings are fixedly connected to the sides, away from the movable plates, of the rotating plates. According to the invention, clamping and fixing operation and rotation control operation of the lithium ion battery can be better completed, so that the test operation can be better completed, the test effect is better and more accurate, the overall operation is simple, and the practical effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium - ion batteries, and in particular, to an internal battery thermal testing device for lithium - ion batteries. Background Art

[0002] A lithium - ion battery is a secondary battery (rechargeable battery). It mainly works by the movement of lithium ions between the positive electrode and the negative electrode. During the use of lithium - ion batteries, corresponding battery heat is often generated, mainly including reaction heat, Joule heat, polarization heat, and decomposition heat. When the battery heat is too high, it will cause the internal temperature of the component to rise, affecting the normal operation of the component, and will also cause the battery to bulge. In severe cases, it will cause the battery to explode. Moreover, excessive battery heat will also accelerate the aging process of the product itself and shorten its lifespan. Therefore, before using a lithium - ion battery, it is necessary to perform corresponding testing operations on its internal heat to improve overall safety. Currently, infrared thermal imaging equipment is mainly used for testing operations. The overall operation is simple and the test results are accurate. However, in the actual testing process, the size of the lithium - ion battery cannot be adjusted accordingly, and the position of the lithium - ion battery cannot be adjusted accordingly, resulting in certain deviations in the test results. At the same time, during the testing process, the lithium - ion battery cannot be rotated accordingly, and multiple testing operations are required, resulting in a relatively long overall testing time. Therefore, an internal battery thermal testing device for lithium - ion batteries is provided. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the prior art, such as: the size of the lithium - ion battery cannot be adjusted accordingly, and the position of the lithium - ion battery cannot be adjusted accordingly, resulting in certain deviations in the test results. At the same time, during the testing process, the lithium - ion battery cannot be rotated accordingly, and multiple testing operations are required, resulting in a relatively long overall testing time. And a lithium - ion battery internal battery thermal testing device is proposed.

[0004] In order to achieve the above - mentioned purpose, the present invention adopts the following technical solutions: A thermal test device for the interior of a lithium-ion battery, comprising a housing. Inside the housing, an infrared thermal imaging device is fixedly connected to the right side. On the outer right side of the housing, a display screen is fixedly connected. The display screen and the infrared thermal imaging device are arranged opposite to each other. Inside the housing, there are multiple moving plates. The multiple moving plates are arranged in pairs, and each pair of moving plates is arranged vertically opposite to each other. On the side of each pair of moving plates close to the other, a rotating rod is rotatably connected. On the side of the rotating rod away from the moving plate, a rotating plate is fixedly connected. On the side of the rotating plate away from the moving plate, a fixed ring is fixedly connected. On the side of the rotating plate away from the moving plate, a first spring is also fixedly connected. On the side of the first spring away from the rotating plate, a conductive sheet is fixedly connected. The conductive sheet passes through the fixed ring. The conductive sheet is connected to the infrared thermal imaging device through a wire. The multiple moving plates are connected to the housing through an installation device. A first gear is fixedly sleeved on the outer side of the rotating rod. Inside the housing, there are multiple square rods. The multiple square rods are arranged opposite to the moving plates on the left side of the moving plates. Two moving frames are slidably sleeved on the outer sides of the multiple square rods up and down. A third gear is fixedly sleeved on the outer sides of the two moving frames. The third gear is connected to the first gear through a tooth chain. A rotation fixing device for the square rod is provided inside the housing.

[0005] Preferably, the installation device includes multiple installation rods. The multiple installation rods are divided into four groups. The four groups of installation rods are arranged on the upper and lower sides of the moving plates. On the side of the multiple installation rods close to the moving plates, there are slots. On the side of the multiple installation rods away from the moving plates, there are insertion rods. The insertion rods and the slots are matched and corresponding. On the side of the multiple moving plates close to the installation rods, two moving rods are symmetrically fixedly connected. The two moving rods pass through the slots and are matched and corresponding to the slots. A second spring is sleeved on the outer sides of the two moving rods. The second spring is matched and corresponding to the installation rods. On the upper and lower sides inside the housing, multiple slots identical to the side walls of the installation rods are symmetrically provided.

[0006] Preferably, the rotation fixing device includes a plurality of second gears rotatably connected to the upper side inside the housing. The plurality of second gears are meshed and connected. Square grooves are provided on the lower sides of the plurality of second gears. Control grooves are provided on the upper and lower sides of the plurality of square rods. Control rods are slidably sleeved in the two control grooves. The control rods penetrate through the control grooves. The control rods are connected to the bottoms of the control grooves through third springs. A plurality of mounting plates are rotatably connected to the lower side of the housing. The plurality of mounting plates are arranged in matching correspondence with the second gears. Square grooves identical to the lower sides of the second gears are provided on the upper sides of the plurality of mounting plates. And the control rods penetrate through the square grooves and are arranged in matching correspondence with the square grooves. A regulating cylinder is fixedly connected to the upper side of one of the second gears. A regulating rod is slidably sleeved in the regulating cylinder. The regulating rod penetrates through the housing. A regulating groove is provided on the upper side of the housing. The regulating rod penetrates through the regulating groove. A regulating plate is fixedly sleeved on the regulating rod located in the regulating groove. A fourth spring is fixedly connected to the upper side of the regulating plate. A regulating ring is fixedly connected to the upper side of the fourth spring. The regulating ring is rotatably connected to the regulating groove. Two limiting rods are symmetrically and fixedly connected to the lower side of the regulating plate. A plurality of limiting grooves are circumferentially provided on the upper side inside the regulating groove. The two limiting rods penetrate through the limiting grooves and are arranged in matching correspondence with the limiting grooves.

[0007] Preferably, control rings are slidably sleeved on the upper and lower sides of the outer sides of the plurality of square rods. The two control rings are connected to the control rods through connecting rods.

[0008] Preferably, threaded holes are provided inside the two moving frames. Threaded rods are threadedly sleeved in the threaded holes. The threaded rods penetrate through the threaded holes. The threaded rods are in contact connection with the square rods.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation among the plurality of mounting rods, insertion rods and slots, the clamping and fixing operation of the lithium-ion battery is completed. At the same time, corresponding adjustments can be made according to the actual working conditions, so that the position of the lithium-ion battery can be better tested. Then, under the action of a series of transmission devices, when the lithium-ion battery is being tested, corresponding rotation operations can be performed according to the actual working conditions, so that the testing operation can be better completed, the testing effect is better, the testing effect is more accurate, the overall operation is simple, and the practical effect is good. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of a lithium-ion battery internal battery thermal testing device proposed by the present invention; Figure 2 is Figure 1 the enlarged structural view at A in Figure 3 is Figure 1Enlarged view of the structure at position B in [Chinese name]; Figure 4 Side view connection schematic diagram of the second gear in a battery thermal testing device inside a lithium-ion battery proposed by the present invention; Figure 5 For Figure 4 Enlarged view of the structure at position C in [Chinese name].

[0011] In the figure: 1 housing, 2 infrared thermal imaging device, 3 display screen, 4 moving plate, 5 rotating rod, 6 rotating plate, 7 fixed ring, 8 first spring, 9 conductive sheet, 10 second spring, 11 mounting rod, 12 inserting rod, 13 inserting slot, 14 moving rod, 15 first gear, 16 tooth chain, 17 square rod, 18 mounting plate, 19 second gear, 20 square groove, 21 control groove, 22 control rod, 23 third spring, 24 connecting rod, 25 control ring, 26 moving frame, 27 third gear, 28 threaded hole, 29 threaded rod, 30 regulating groove, 31 regulating cylinder, 32 regulating rod, 33 regulating ring, 34 fourth spring, 35 regulating plate, 36 limiting rod, 37 limiting slot. Specific embodiments

[0012] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0013] Refer to Figures 1-5, a battery thermal testing device inside a lithium-ion battery, comprising a housing 1. Inside the housing 1, an infrared thermal imaging device 2 is fixedly connected to the right side. On the outer right side of the housing 1, a display screen 3 is fixedly connected. The display screen 3 and the infrared thermal imaging device 2 are arranged opposite to each other. Inside the housing 1, there are multiple moving plates 4. The multiple moving plates 4 are arranged in pairs, and each pair of moving plates 4 is arranged vertically opposite to each other. On the side of each pair of moving plates 4 close to each other, a rotating rod 5 is rotatably connected. On the side of the rotating rod 5 far from the moving plate 4, a rotating plate 6 is fixedly connected. On the side of the rotating plate 6 far from the moving plate 4, a fixing ring 7 is fixedly connected. On the side of the rotating plate 6 far from the moving plate 4, a first spring 8 is also fixedly connected. On the side of the first spring 8 far from the rotating plate 6, a conductive sheet 9 is fixedly connected. The conductive sheet 9 passes through the fixing ring 7 and is connected to the infrared thermal imaging device 2 through a wire. The multiple moving plates 4 are connected to the housing 1 through an installation device. The installation device includes multiple installation rods 11. The multiple installation rods 11 are divided into four groups. The four groups of installation rods 11 are arranged on the upper and lower sides of the moving plates 4. On the side of the multiple installation rods 11 close to the moving plates 4, there are slots 13. On the side of the multiple installation rods 11 far from the moving plates 4, there are insertion rods 12. The insertion rods 12 and the slots 13 are matched and corresponding. On the side of the multiple moving plates 4 close to the installation rods 11, two moving rods 14 are symmetrically fixedly connected. The two moving rods 14 pass through the slots 13 and are matched and corresponding to the slots 13. A second spring 10 is sleeved on the outer sides of the two moving rods 14. The second spring 10 is matched and corresponding to the installation rods 11. On the upper and lower sides inside the housing 1, multiple slots 13 identical to the side walls of the installation rods 11 are symmetrically arranged. By the cooperation between the multiple installation rods 11, the clamping and fixing operation of the lithium-ion battery is completed, and the number of the installation rods 11 can be adjusted accordingly according to the actual working conditions, so as to better complete the clamping and fixing operation of the lithium-ion battery and provide convenience for the subsequent testing operation. A first gear 15 is fixedly sleeved on the outer side of the rotating rod 5. Inside the housing 1, there are multiple square rods 17. The multiple square rods 17 are arranged opposite to the moving plates 4 on the left side of the moving plates 4. On the outer sides of the multiple square rods 17, two moving frames 26 are slidably sleeved up and down. On the outer sides of the two moving frames 26, a third gear 27 is fixedly sleeved. The third gear 27 is connected to the first gear 15 through a tooth chain 16. Inside the housing 1, there is a rotating and fixing device for the square rods 17.The rotation fixing device includes a plurality of second gears 19 rotatably connected to the upper side inside the housing 1. The plurality of second gears 19 are meshed and connected. A square groove 20 is provided on the lower side of the plurality of second gears 19. Control grooves 21 are provided on both the upper and lower sides of the plurality of square rods 17. A control rod 22 is slidably sleeved in the two control grooves 21. The control rod 22 penetrates through the control groove 21. The control rod 22 is connected to the bottom of the control groove 21 through a third spring 23. A plurality of mounting plates 18 are rotatably connected to the lower side of the housing 1. The plurality of mounting plates 18 are arranged in matching correspondence with the second gears 19. A square groove 20 identical to the lower side of the second gear 19 is provided on the upper side of the plurality of mounting plates 18. And the control rod 22 penetrates through the square groove 20 and is arranged in matching correspondence with the square groove 20. A regulating cylinder 31 is fixedly connected to the upper side of one of the second gears 19. A regulating rod 32 is slidably sleeved in the regulating cylinder 31. The regulating rod 32 penetrates through the housing 1. A regulating groove 30 is provided on the upper side of the housing 1. The regulating rod 32 penetrates through the regulating groove 30. A regulating plate 35 is fixedly sleeved on the regulating rod 32 located in the regulating groove 30. A fourth spring 34 is fixedly connected to the upper side of the regulating plate 35. A regulating ring 33 is fixedly connected to the upper side of the fourth spring 34. The regulating ring 33 is rotatably connected to the regulating groove 30. Two limiting rods 36 are symmetrically and fixedly connected to the lower side of the regulating plate 35. A plurality of limiting grooves 37 are circumferentially provided on the upper side in the regulating groove 30. The two limiting rods 36 penetrate through the limiting grooves 37 and are arranged in matching correspondence with the limiting grooves 37. By the cooperation between the second gear 19 and the mounting plate 18, the clamping operation of the square rod 17 is completed. Then, by the cooperation between the limiting rod 36 and the limiting groove 37, the overall fixing operation of the square rod 17 is completed. The two cooperate to complete the rotation and fixing operations of the square rod 17. Control rings 25 are slidably sleeved on both the upper and lower sides of the outer side of the plurality of square rods 17. The two control rings 25 are connected to the control rod 22 through a connecting rod 24 to complete the moving control operation of the control rod 22. Threaded holes 28 are provided inside the two moving frames 26. A threaded rod 29 is threadedly sleeved in the threaded holes 28. The threaded rod 29 penetrates through the threaded holes 28. The threaded rod 29 is in contact connection with the square rod 17 to complete the installation and fixing operation between the moving frame 26 and the square rod 17.,

[0014] In the present invention, when it is necessary to perform a test operation on the internal battery heat of a lithium-ion battery using the entire device, the specific operation is as follows: Open the outer shell 1, select an appropriate number of the entire mounting rods 11, insert the insertion rods 12 into the corresponding slots 13, and insert the moving rods 14 into the corresponding slots 13. Move the moving plate 4 to compress the second spring 10. Place the lithium-ion battery between the upper and lower conductive sheets 9, and make the conductive sheets 9 and the lithium-ion battery contact and connect with each other in a matching manner. Release the moving plate 4. At this time, the fixing ring 7 and the lithium-ion battery are in close contact and connected together. Select the corresponding square rod 17, place the square rod 17 on the left side of the moving plate 4, move the control ring 25 towards each other. The control ring 25 drives the control rod 22 to move through the connecting rod 24. The control rod 22 compresses the corresponding third spring 23 until the control rod 22 completely enters the control groove 21. Place the square rod 17 between the second gear 19 and the mounting plate 18, and make the positions of the control rod 22 and the square groove 20 opposite to each other. Release the control ring 25. Under the action of the third spring 23, the control rod 22 enters the corresponding square groove 20. Move the moving frame 26 up and down. The moving frame 26 drives the third gear 27 to move up and down until the position of the third gear 27 meets the working requirements. Rotate the threaded rod 29 until the threaded rod 29, the square rod 17, and the moving frame 26 are in close contact and connected together. Connect the first gear 15 and the third gear 27 together using the tooth chain 16. Close the outer shell 1, start the infrared thermal imaging device 2 and the display screen 3, and start the corresponding test operation. This is the prior art and will not be elaborated further. During the test process, when it is necessary to rotate the lithium-ion battery, move the regulation rod 32 upward. The regulation rod 32 drives the regulation plate 35 to move upward. While compressing the fourth spring 34, the regulation plate 35 drives the limiting rod 36 to move upward until the limiting rod 36 moves out of the limiting groove 37. Rotate the regulation rod 32. The regulation rod 32 drives the second gear 19 to rotate through the regulation cylinder 31. The second gear 19 drives the square rod 17 to rotate. The square rod 17 drives the third gear 27 to rotate through the moving frame 26. The third gear 27 drives the first gear 15 to rotate through the tooth chain 16. The first gear 15 drives the rotating plate 6 to rotate through the rotating rod 5, thereby driving the lithium-ion battery to perform the corresponding rotation operation, and thus can better complete the corresponding test operation.

[0015] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An internal battery thermal test device for a lithium-ion battery, comprising a housing (1), characterized in that, On the right side inside the housing (1), an infrared thermal imaging device (2) is fixedly connected. On the right side outside the housing (1), a display screen (3) is fixedly connected. The display screen (3) and the infrared thermal imaging device (2) are arranged opposite to each other. Inside the housing (1), there are multiple moving plates (4). The multiple moving plates (4) are arranged in pairs, and each pair of moving plates (4) is arranged vertically opposite to each other. On the side of each pair of moving plates (4) close to each other, a rotating rod (5) is rotatably connected. On the side of the rotating rod (5) away from the moving plate (4), a rotating plate (6) is fixedly connected. On the side of the rotating plate (6) away from the moving plate (4), a fixing ring (7) is fixedly connected. On the side of the rotating plate (6) away from the moving plate (4), a first spring (8) is also fixedly connected. On the side of the first spring (8) away from the rotating plate (6), a conductive sheet (9) is fixedly connected. The conductive sheet (9) passes through the fixing ring (7). The conductive sheet (9) is connected to the infrared thermal imaging device (2) through a wire. The multiple moving plates (4) are connected to the housing (1) through an installation device. A first gear (15) is fixedly sleeved on the outer side of the rotating rod (5). Inside the housing (1), there are multiple square rods (17). The multiple square rods (17) are arranged opposite to the moving plates (4) on the left side of the moving plates (4). Two moving frames (26) are slidably sleeved on the outer sides of the multiple square rods (17) vertically. A third gear (27) is fixedly sleeved on the outer sides of the two moving frames (26). The third gear (27) is connected to the first gear (15) through a tooth chain (16). A rotating and fixing device for the square rod (17) is arranged inside the housing (1).

2. The internal battery thermal testing device for a lithium-ion battery according to claim 1, characterized in that, The installation device includes multiple installation rods (11). The multiple installation rods (11) are divided into four groups. The four groups of installation rods (11) are arranged on the upper and lower sides of the moving plate (4). On the side of the multiple installation rods (11) close to the moving plate (4), there are slots (13). On the side of the multiple installation rods (11) away from the moving plate (4), there are insertion rods (12). The insertion rods (12) and the slots (13) are matched and corresponding. On the side of the multiple moving plates (4) close to the installation rods (11), two moving rods (14) are symmetrically and fixedly connected. The two moving rods (14) pass through the slots (13) and are matched and corresponding to the slots (13). A second spring (10) is sleeved on the outer sides of the two moving rods (14). The second spring (10) is matched and corresponding to the installation rod (11). On the upper and lower sides inside the housing (1), multiple slots (13) with the same side wall as the installation rod (11) are symmetrically arranged.

3. The internal battery thermal test device for a lithium-ion battery according to claim 1, characterized in that, The rotation fixing device includes a plurality of second gears (19) rotatably connected to the upper side inside the housing (1). The plurality of second gears (19) are meshed and connected. A square groove (20) is provided on the lower side of the plurality of second gears (19). Control grooves (21) are provided on both the upper and lower sides of the plurality of square rods (17). A control rod (22) is slidably sleeved in the two control grooves (21). The control rod (22) penetrates through the control groove (21). The control rod (22) is connected to the bottom of the control groove (21) through a third spring (23). A plurality of mounting plates (18) are rotatably connected to the lower side of the housing (1). The plurality of mounting plates (18) are matched and corresponding to the second gears (19). Square grooves (20) identical to the lower sides of the second gears (19) are provided on the upper sides of the plurality of mounting plates (18). And the control rod (22) penetrates through the square groove (20) and is matched and corresponding to the square groove (20). A regulating cylinder (31) is fixedly connected to the upper side of one of the second gears (19). A regulating rod (32) is slidably sleeved in the regulating cylinder (31). The regulating rod (32) penetrates through the housing (1). A regulating groove (30) is provided on the upper side of the housing (1). The regulating rod (32) penetrates through the regulating groove (30). A regulating plate (35) is fixedly sleeved on the regulating rod (32) located in the regulating groove (30). A fourth spring (34) is fixedly connected to the upper side of the regulating plate (35). A regulating ring (33) is fixedly connected to the upper side of the fourth spring (34). The regulating ring (33) is rotatably connected to the regulating groove (30). Two limiting rods (36) are symmetrically and fixedly connected to the lower side of the regulating plate (35). A plurality of limiting grooves (37) are circumferentially provided on the upper side inside the regulating groove (30). The two limiting rods (36) penetrate through the limiting grooves (37) and are matched and corresponding to the limiting grooves (37).

4. A lithium-ion battery internal battery thermal testing device according to claim 3, characterized in that, Control rings (25) are slidably sleeved on both the upper and lower sides of the outer sides of the plurality of square rods (17). The two control rings (25) are connected to the control rod (22) through a connecting rod (24).

5. The internal battery thermal testing device for a lithium-ion battery according to claim 1, wherein, Threaded holes (28) are provided inside the two moving frames (26). Threaded rods (29) are threadedly sleeved in the threaded holes (28). The threaded rods (29) penetrate through the threaded holes (28). The threaded rods (29) are in contact connection with the square rods (17).

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