Copper-aluminum bar fixing device for lithium battery module

Abstract

The utility model provides a copper-aluminum bar fixing device for a lithium battery module. The copper-aluminum bar fixing device comprises a battery block and an end plate, the fixing block is fixedly installed in the middle of the top of the end plate, clamping grooves are formed in the bottoms of the two sides of the fixing block, and copper bar fixing bases are arranged on the two sides of the fixing block. According to the copper and aluminum bar fixing device for the lithium battery module, the copper bar and the aluminum bar are mounted on the surface of the module through the copper bar fixing seat and the aluminum bar fixing seat, the top of the battery block is blocked by the copper bar and the aluminum bar, the end plate and the battery block are limited together by the copper bar fixing seat and the aluminum bar fixing seat, and the copper and aluminum bar fixing device for the lithium battery module is simple in structure, strong in practicability and high in practicability. According to the battery module disclosed by the utility model, the joints between the battery blocks and the end plates are limited, so that the plurality of battery blocks cannot be loosened under the limitation of the end plates, the copper bar fixing seats, the aluminum bar fixing seats, the copper bars and the aluminum bars and are not easily influenced by external vibration, the assembly stability of the battery module is improved, and the operation stability of the battery blocks is kept.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery module assembly, in particular to a lithium battery module copper and aluminum bar fixing device. Background Art

[0002] Lithium-ion batteries are secondary batteries that rely on the movement of lithium ions between the positive and negative electrodes to work. During the charge and discharge process, Li+ is intercalated and deintercalated back and forth between the two electrodes: when charging, Li+ is deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; when discharging, the opposite is true. Lithium-ion batteries have been widely used in the field of electric vehicles because they have high energy density and long battery life.

[0003] The battery module is assembled from multiple lithium batteries and two end plates. The two end plates clamp the multiple lithium batteries inside from both sides. Although this makes it convenient to replace the batteries, when the lithium battery module is affected by vibration, the internal batteries are easily loosened due to the vibration, and the fastening effect is poor.

[0004] Therefore, it is necessary to provide a lithium battery module copper and aluminum bar fixing device to solve the above technical problems. Utility Model Content

[0005] The utility model provides a lithium battery module copper-aluminum bar fixing device, which solves the problem that when the lithium battery module is affected by vibration, the internal batteries are easily loosened due to vibration and the fastening effect is poor.

[0006] In order to solve the above technical problems, the utility model provides a lithium battery module copper and aluminum bar fixing device, comprising: a battery block and an end plate;

[0007] A fixing block, the fixing block is fixedly installed in the middle of the top of the end plate, the bottoms of both sides of the fixing block are provided with card slots, both sides of the fixing block are provided with copper bar fixing seats, the copper bar fixing seats include a mounting block, a card block, a pressure block, a mounting slot and a threaded hole, the mounting block is placed on one side of the top of the end plate, the two card blocks are fixedly installed on both sides of the outer surface of the mounting block respectively, the pressure block is fixedly installed on the top of the mounting block, the mounting slot is opened in the middle of the top of the mounting block, and the threaded hole is opened in the middle of the bottom of the inner cavity of the mounting slot;

[0008] An aluminum bar is arranged on the top of the installation groove, a copper bar is placed on the top of the aluminum bar, and an aluminum bar fixing seat is arranged on the top of the copper bar fixing seat.

[0009] Preferably, the aluminum bar fixing seat includes a pressing plate, a connecting hole and an insulating bolt, the pressing plate is arranged on the top of the pressing block, the connecting hole is opened in the middle of the top of the pressing plate, and the insulating bolt is arranged inside the connecting hole.

[0010] Preferably, a heat dissipation hole is opened in the middle of the surface of the end plate, and bumps are fixedly installed around the outer surface of the end plate.

[0011] Preferably, steel belts are provided on both upper and lower sides of the outer surface of the end plate.

[0012] Preferably, the copper bar and the aluminum bar are stacked and placed inside the installation groove, a connecting hole is provided on the top of the copper bar and the aluminum bar stack, and the connecting hole is connected to the insulating bolt and the threaded hole.

[0013] Preferably, mounting grooves are provided in the middle of both sides of the outer surface of the end plate, and screw grooves are provided on both sides of the inner cavity of the mounting groove.

[0014] Preferably, a fixing steel plate is provided on the surface of the mounting groove, and screws are installed around the surface of the fixing steel plate.

[0015] Preferably, a copper bar fixing plate is provided on the surface of the end plate, a reserved hole is opened on the surface of the copper bar fixing plate, a cable tie is provided on the surface of the reserved hole, and screw holes are provided around the surface of the copper bar fixing plate.

[0016] Compared with the related art, the copper-aluminum bar fixing device for lithium battery module provided by the utility model has the following beneficial effects:

[0017] The utility model provides a copper-aluminum bar fixing device for a lithium battery module, wherein the copper bar and the aluminum bar are installed on the surface of the module through a copper bar fixing seat and an aluminum bar fixing seat, the copper bar and the aluminum bar block the top of the battery block, and the copper bar fixing seat and the aluminum bar fixing seat restrict the end plate and the battery block together. The device has a simple structure and is highly practical, and restricts the connection between the battery block and the end plate, so that multiple battery blocks cannot be loosened under the restriction of the end plate, the copper bar fixing seat, the aluminum bar fixing seat, the copper bar and the aluminum bar, and are not easily affected by external vibrations, thereby improving the stability of the battery module assembly and maintaining the stability of the battery block operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a first embodiment of a copper-aluminum bar fixing device for a lithium battery module provided by the utility model;

[0019] Figure 2 for Figure 1 An enlarged schematic diagram of point A is shown;

[0020] Figure 3 for Figure 2 The schematic diagram of the copper bar fixing seat structure shown;

[0021] Figure 4 for Figure 2The schematic diagram of the aluminum row fixing seat structure shown;

[0022] Figure 5 for Figure 2 The schematic diagram of the copper-aluminum busbar installation process shown;

[0023] Figure 6 A schematic structural diagram of a second embodiment of a copper-aluminum bar fixing device for a lithium battery module provided by the utility model;

[0024] Figure 7 for Figure 6 A schematic side view of the end plate shown;

[0025] Figure 8 A schematic structural diagram of a third embodiment of a copper-aluminum bar fixing device for a lithium battery module provided by the utility model;

[0026] Fig. 9 for Figure 8 The front view schematic diagram of the copper bar fixing plate shown;

[0027] Fig.10 for Figure 3 Another schematic diagram of the copper busbar fixing seat is shown.

[0028] Numbers in the figure: 1. Battery block, 2. End plate, 3. Heat dissipation hole, 4. Copper busbar fixing seat, 41. Mounting block, 42. Card block, 43. Pressing block, 44. Mounting slot, 45. Threaded hole, 5. Aluminum busbar fixing seat, 51. Pressing plate, 52. Connecting hole, 53. Limiting piece, 6. Copper busbar, 7. Aluminum busbar, 8. Bump, 9. Steel belt, 11. Fixing block, 12. Card slot, 13. Fixing steel plate, 14. Screw, 15. Mounting slot, 16. Screw slot, 17. Copper busbar fixing plate, 18. Reserved hole, 19. Screw hole. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0030] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic structural diagram of a first embodiment of a copper-aluminum bar fixing device for a lithium battery module provided by the utility model; Figure 2 for Figure 1 An enlarged schematic diagram of point A is shown; Figure 3 for Figure 2 The schematic diagram of the copper bar fixing seat structure shown; Figure 4 for Figure 2 The schematic diagram of the aluminum row fixing seat structure shown; Figure 5 for Figure 2A copper-aluminum busbar fixing device for a lithium battery module includes: a battery block 1 and an end plate 2;

[0031] A fixing block 11, the fixing block 11 is fixedly installed in the middle of the top of the end plate 2, and the bottoms of both sides of the fixing block 11 are provided with card slots 12. Both sides of the fixing block 11 are provided with copper bar fixing seats 4, and the copper bar fixing seats 4 include a mounting block 41, a card block 42, a pressure block 43, a mounting slot 44 and a threaded hole 45. The mounting block 41 is placed on one side of the top of the end plate 2, and the two card blocks 42 are fixedly installed on both sides of the outer surface of the mounting block 41, respectively. The pressure block 43 is fixedly installed on the top of the mounting block 41, and the mounting slot 44 is opened in the middle of the top of the mounting block 41. The threaded hole 45 is opened in the middle of the bottom of the inner cavity of the mounting slot 44;

[0032] An aluminum bar 7 is arranged on the top of the mounting groove 44 , a copper bar 6 is placed on the top of the aluminum bar 7 , and an aluminum bar fixing seat 5 is arranged on the top of the copper bar fixing seat 4 .

[0033] The aluminum bar fixing seat 5 includes a pressing plate 51, a connecting hole 52 and a limiting member 53. The pressing plate 51 is arranged on the top of the pressing block 43, the connecting hole 52 is opened in the middle of the top of the pressing plate 51, and the limiting member 53 is arranged inside the connecting hole 52.

[0034] A heat dissipation hole 3 is provided in the middle of the surface of the end plate 2 , and bumps 8 are fixedly installed around the outer surface of the end plate 2 .

[0035] Steel strips 9 are provided on both upper and lower sides of the outer surface of the end plate 2 .

[0036] The copper bar 6 and the aluminum bar 7 are stacked and placed inside the installation groove 44 . A communication hole is provided on the top of the stack of the copper bar 6 and the aluminum bar 7 . The communication hole is connected to the stopper 53 and the threaded hole 45 .

[0037] The top of the limiting member 53 is a bolt insulating cap, and a metal bolt is set in the middle of the bottom. The metal bolt is inserted into the connecting hole 52 and passes through the copper bar 6 and the aluminum bar 7, so that the metal bolt thread at the bottom of the limiting member 53 is engaged with the inside of the threaded hole 45, so that the copper bar 6 and the aluminum bar 7 are restricted to the top of the battery block 1 and the side of the end plate 2. The bolt insulating cap is at the top, and the insulating cap and the aluminum bar fixing seat 5 have an insulating effect.

[0038] Can be as Fig.10 The copper bar fixing seat 4 shown in the figure can be directly slotted in the center and a nut can be placed thereon; Figure 3 As shown, Figure 3The copper bar fixing seat 4 does not need to be nested during injection molding, has low mold cost and is a low-cost method, and can be directly assembled into a nut later.

[0039] The copper-aluminum bar fixing seat uses a bolt fixing structure to lock the copper-aluminum bar, allowing the copper-aluminum bar contact surfaces to fully contact, ensuring that no heat is generated during overcurrent and that the bar does not move or fall off under vibration conditions.

[0040] Since the end plate 2 is made of metal, insulating material is required to isolate the metal from the copper-aluminum bar. Two grooves are reserved on the top of the end plate 2 for placing the matching copper-aluminum bar fixing seat (the grooves on both sides of the end plate 2 are simultaneously opened to make the end plate symmetrical, so as to achieve the purpose of placing the same end plate on both sides of the module). The copper-aluminum bar fixing seat is made of insulating material, and the end plate 2 and the copper-aluminum bar fixing have a slot structure design.

[0041] A nut fixing structure is provided on the copper-aluminum bar fixing seat to lock the copper-aluminum bar so that the contact surfaces of the copper-aluminum bar are in full contact, ensuring that no heat is generated during overcurrent and that the bar does not move or fall off under vibration conditions.

[0042] After the copper-aluminum bar fixing seat and the copper-aluminum bar are fixed with screws, an insulating cap needs to be installed above the limiter 53 to insulate the limiter 53 from the upper sheet metal. The insulating cap needs to have an interference fit with the copper-aluminum bar fixing seat and the limiter 53 to ensure that it does not fall off during vibration.

[0043] The working principle of the copper-aluminum bar fixing device for a lithium battery module provided by the utility model is as follows:

[0044] During operation, first install the copper bar fixing seat 4 on the top of the end plate 2, the mounting block 41 on the top of the end plate 2, the card block 42 embedded into the inside of the card slot 12, the pressing block 43 padded on the top of the fixing block 11, the user places the copper bar 6 on the top of the mounting slot 44, and padded the aluminum bar 7 on the top of the copper bar 6, then install the aluminum bar fixing seat 5 on the top of the copper bar fixing seat 4, press the pressing plate 51 on the top of the pressing block 43, and on the top of the copper bar 6, then the user inserts the limiting member 53 into the connecting hole 52 and passes through the copper bar 6 and the aluminum bar 7, so that the limiting member 53 is threadedly engaged into the inside of the threaded hole 45, so that the copper bar 6 and the aluminum bar 7 are restricted to the top of the battery block 1 and the side of the end plate 2.

[0045] Compared with the related art, the copper-aluminum bar fixing device for lithium battery module provided by the utility model has the following beneficial effects:

[0046] The utility model provides a copper-aluminum bar fixing device for a lithium battery module, wherein copper bars 6 and aluminum bars 7 are installed on the surface of the module through copper bar fixing seats 4 and aluminum bar fixing seats 5, the copper bars 6 and aluminum bars 7 block the top of the battery block 1, and the copper bar fixing seats 4 and aluminum bar fixing seats 5 restrict the end plate 2 and the battery block 1 together. The device has a simple structure and strong practicality, restricts the connection between the battery block 1 and the end plate 2, so that multiple battery blocks 1 cannot be loosened under the restriction of the end plate 2, the copper bar fixing seats 4, the aluminum bar fixing seats 5, the copper bars 6 and the aluminum bars 7, and are not easily affected by external vibrations, thereby improving the stability of the battery module assembly and maintaining the stability of the operation of the battery block 1.

[0047] Second embodiment

[0048] Please refer to Figure 6 and Figure 7 Based on the copper-aluminum bar fixing device for a lithium battery module provided in the first embodiment of the present application, the second embodiment of the present application proposes another copper-aluminum bar fixing device for a lithium battery module. The second embodiment is only a preferred method of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0049] Specifically, the difference of the copper-aluminum bar fixing device for a lithium battery module provided in the second embodiment of the present application is that, in a copper-aluminum bar fixing device for a lithium battery module, mounting grooves 15 are provided in the middle of both sides of the outer surface of the end plate 2, and screw grooves 16 are provided on both sides of the inner cavity of the mounting groove 15.

[0050] A fixing steel plate 13 is disposed on the surface of the mounting groove 15 , and screws 14 are installed around the surface of the fixing steel plate 13 .

[0051] The working principle of the copper-aluminum bar fixing device for a lithium battery module provided by the utility model is as follows:

[0052] During operation, the steel plate 13 is firstly fixed on the surface of the mounting groove 15 , and the screws 14 are inserted into the steel plate 13 and threadedly engaged into the screw groove 16 , so that the steel plate 13 is fixed on the side of the end plate 2 .

[0053] Compared with the related art, the copper-aluminum bar fixing device for lithium battery module provided by the utility model has the following beneficial effects:

[0054] The utility model provides a lithium battery module copper-aluminum row fixing device, by fixing a steel plate 13 pad on the surface of a mounting groove 15, and using a screw 14 to insert the fixing steel plate 13 and threadedly engage into the screw groove 16, so that the fixing steel plate 13 is fixed to the side of the end plate 2, and the left and right sides of the battery block 1 are restricted and blocked. The device has a simple structure and strong practicality, and uses the fixing steel plate 13 to limit the loosening of the battery block 1, thereby improving the restriction on the battery block 1 and maintaining the stability of the operation of the battery block 1.

[0055] Third embodiment

[0056] Please refer to Figure 8 and Fig. 9 Based on the copper-aluminum bar fixing device for a lithium battery module provided in the first embodiment of the present application, the third embodiment of the present application proposes another copper-aluminum bar fixing device for a lithium battery module. The third embodiment is only a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0057] Specifically, the difference of the copper-aluminum bar fixing device for a lithium battery module provided in the third embodiment of the present application is that, in a copper-aluminum bar fixing device for a lithium battery module, a copper bar fixing plate 17 is provided on the surface of the end plate 2, a reserved hole 18 is opened on the surface of the copper bar fixing plate 17, a cable tie 20 is provided on the surface of the reserved hole 18, and screw holes 19 are provided all around the surface of the copper bar fixing plate 17.

[0058] The fixing plate 17 is made of insulating material and has an insulating effect, and separates the copper busbar 6 and the end plate 2 to insulate the copper busbar 6 and the end plate 2 .

[0059] A plurality of reserved holes 18 are provided to match different directions of the copper busbar 6 and are suitable for copper busbars 5 of various shapes.

[0060] The working principle of the copper-aluminum bar fixing device for a lithium battery module provided by the utility model is as follows:

[0061] During operation, the screw is firstly threadedly engaged into the handle of the screw hole 19 and nailed to the surface of the end plate 2 , and then the copper bar 6 is restricted to the surface of the copper bar fixing plate 17 by the cable tie 20 .

[0062] Compared with the related art, the copper-aluminum bar fixing device for lithium battery module provided by the utility model has the following beneficial effects:

[0063] The utility model provides a lithium battery module copper-aluminum bar fixing device, by installing a copper bar fixing plate 17 on the surface of an end plate 2 by screws, and tying the copper bar 6 with a cable tie 20 through a reserved hole 18. The device has a simple structure and strong practicality, reduces the vibration effect on the copper bar 6, and maintains the stability of the copper bar 6 when it is installed.

[0064] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lithium battery module copper and aluminum bar fixing device, characterized in that: include: Battery blocks and end plates; A fixing block, the fixing block is fixedly installed in the middle of the top of the end plate, the bottoms of both sides of the fixing block are provided with card slots, both sides of the fixing block are provided with copper bar fixing seats, the copper bar fixing seats include a mounting block, a card block, a pressure block, a mounting slot and a threaded hole, the mounting block is placed on one side of the top of the end plate, the two card blocks are fixedly installed on both sides of the outer surface of the mounting block respectively, the pressure block is fixedly installed on the top of the mounting block, the mounting slot is opened in the middle of the top of the mounting block, and the threaded hole is opened in the middle of the bottom of the inner cavity of the mounting slot; An aluminum bar is arranged on the top of the installation groove, a copper bar is placed on the top of the aluminum bar, and an aluminum bar fixing seat is arranged on the top of the copper bar fixing seat.

2. A lithium battery module copper and aluminum bar fixing device according to claim 1, characterized in that: The aluminum bar fixing seat includes a pressing plate, a connecting hole and an insulating bolt. The pressing plate is arranged on the top of the pressing block, the connecting hole is opened in the middle of the top of the pressing plate, and the insulating bolt is arranged inside the connecting hole.

3. A lithium battery module copper and aluminum bar fixing device according to claim 1, characterized in that: A heat dissipation hole is provided in the middle of the surface of the end plate, and bumps are fixedly installed around the outer surface of the end plate.

4. A lithium battery module copper and aluminum bar fixing device according to claim 1, characterized in that: Steel belts are arranged on both upper and lower sides of the outer surface of the end plate.

5. A lithium battery module copper and aluminum bar fixing device according to claim 2, characterized in that: The copper bar and the aluminum bar are stacked and placed inside the installation groove. A communication hole is provided on the top of the copper bar and the aluminum bar stack. The communication hole is connected to the insulating bolt and the threaded hole.

6. A lithium battery module copper and aluminum bar fixing device according to claim 1, characterized in that: The middle of both sides of the outer surface of the end plate are provided with mounting grooves, and the inner cavity of the mounting groove is provided with screw grooves on both sides.

7. A lithium battery module copper and aluminum bar fixing device according to claim 6, characterized in that: A fixing steel plate is arranged on the surface of the installation groove, and screws are installed around the surface of the fixing steel plate.

8. A lithium battery module copper and aluminum bar fixing device according to claim 1, characterized in that: A copper bar fixing plate is arranged on the surface of the end plate, a reserved hole is opened on the surface of the copper bar fixing plate, a cable tie is arranged on the surface of the reserved hole, and screw holes are arranged around the surface of the copper bar fixing plate.

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