Lithium ion battery cover plate assembly

Abstract

The utility model discloses a lithium ion battery cover plate assembly, and particularly relates to the field of battery cover plates, the lithium ion battery cover plate assembly comprises a cover plate body, the cover plate body is respectively provided with a positive pole column, a negative pole column, an explosion-proof assembly, a liquid injection hole and an insulation pad, and the outer sides of the tops of the positive pole column and the negative pole column are respectively provided with a protection mechanism. The protective cover is inserted into the butt joint groove, when the protective cover is inserted, the outer side surface of the positioning block makes contact with the surface of the butt joint groove, the contact force enables the positioning block to slide towards the interior of the positioning box, and the supporting spring is compressed till the positioning groove corresponds to the positioning block in position; and the supporting spring rebounds to drive the positioning block to move outwards to be inserted into the positioning groove, so that mounting of the protective cover is completed. The rotating rod is rotated, the pulling ropes on the two sides are partially wound on the surface of the rotating rod through the rotating rod, the volute spring is made to deform, and therefore the two positioning blocks are driven to move inwards to be separated from the positioning grooves, and then the protective cover can be taken out by lifting upwards. Therefore, the protective cover is convenient to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of battery covers, and specifically relates to a lithium-ion battery cover assembly. Background Art

[0002] A lithium-ion battery is a battery that uses materials capable of undergoing lithium-ion insertion / extraction reactions as the positive and negative active materials and uses an organic electrolyte or polymer electrolyte containing a lithium salt. A lithium battery cover, as the name implies, is a plate-like material covering the top of the lithium battery, mainly playing the roles of protecting the internal structure of the battery, preventing chemical substance leakage, and ensuring the sealing and safety of the battery.

[0003] Chinese Patent discloses a lithium-ion battery cover assembly with the publication number of CN221486734U and the application date of December 21, 2023. Through the combined use of the cover plate, insulating plate, mounting holes, positive electrode block, negative electrode block, pressure relief assembly, protection assembly and explosion-proof assembly, under the action of the pressure relief assembly and the explosion-proof assembly, abnormal gases generated by the lithium-ion battery can be effectively and quickly discharged, achieving a good explosion-proof effect, and the sealing performance is relatively good, which can effectively isolate oxygen and moisture outside the battery, thereby improving the safety of the battery. Under the action of the protection assembly, the positive electrode block and the negative electrode block can be effectively protected, which is beneficial to the normal use of the lithium-ion battery, and the protection assembly is convenient for disassembly and installation and is easy to use. However, the cover plate for protecting the positive and negative electrodes of the battery fixes the protection assembly through positioning bolts. Since the positioning bolts are small and a corresponding screwdriver is required for installation and disassembly, and it is not easy to be threadedly connected with the corresponding hole grooves, the installation and disassembly of the protection assembly are too troublesome. Therefore, the inventor provides a lithium-ion battery cover assembly to solve the problems raised in the above background art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lithium-ion battery cover assembly to achieve the effect of convenient installation and disassembly of the protection cover.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A lithium-ion battery cover assembly includes a cover body, on which a positive electrode column, a negative electrode column, an explosion-proof component, a liquid injection hole and an insulating pad are respectively arranged. A protection mechanism is arranged on the outer sides of the tops of the positive electrode column and the negative electrode column. The protection mechanism includes a docking groove opened on the top surface of the cover body, a protection cover is inserted into the docking groove, positioning boxes are respectively and fixedly connected to both sides of the protection cover, a positioning block is slidably connected inside the positioning box, a support spring is fixedly connected to the inner side of the positioning block, and the right side of the support spring is fixedly connected to the inner side of the positioning box; a U-shaped groove is opened inside the protection cover, pull ropes that can be pulled are respectively arranged on the left and right sides inside the U-shaped groove, and the pull ropes are fixedly connected to the corresponding positioning blocks.

[0007] As a further solution of the present invention: a guide groove is opened on the inner side of the positioning block, a guide rod is slidably connected inside the guide groove, and the inner side of the guide rod is fixedly connected to the positioning box.

[0008] As a further solution of the present invention: the outer surface of the positioning block is inclined to gradually become longer from bottom to top, and a positioning groove is opened on the outer side of the docking groove.

[0009] As a further solution of the present invention: a rotating rod is rotatably connected to the top of the protection cover, the rotating rod extends downward and penetrates the surface of the protection cover and is rotatably connected to the inside of the U-shaped groove; the rotating rod surface is respectively fixedly connected to the two pull ropes; first guide rods are respectively and fixedly connected to the left and right ends of the top side inside the U-shaped groove, second guide rods are respectively and fixedly connected to the left and right ends of the bottom side inside the U-shaped groove, the top of the first guide rod contacts the surface of the pull rope, and the bottom of the second guide rod contacts the surface of the pull rope.

[0010] As a further solution of the present invention: a fixing ring is arranged on the outer side of the rotating rod, the bottom of the fixing ring is fixedly connected to the U-shaped groove, a spiral spring is arranged inside the fixing ring, the outer end of the spiral spring is fixedly connected to the surface of the fixing ring, and the inner end of the spiral spring is fixedly connected to the surface of the rotating rod.

[0011] As a further solution of the present invention: a connecting frame is fixedly connected to the bottom of the cover body, the connecting frame is located directly below the liquid injection hole, a plurality of dispersion holes are opened at the bottom of the connecting frame, and a sealing plug is inserted into the top of the liquid injection hole.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] For this lithium-ion battery cover plate assembly, by inserting the protective cover into the docking groove, and when the protective cover is inserted, the outer surface of the positioning block contacts the surface of the docking groove. The contact force causes the positioning block to slide into the positioning box and compresses the support spring. Until the positioning groove corresponds to the position of the positioning block, the support spring rebounds and drives the positioning block to move outwards and insert into the positioning groove, thus completing the installation of the protective cover. By rotating the rotating rod, the rotating rod winds part of the pulling ropes on both sides onto the surface of the rotating rod and deforms the spiral spring, thereby shortening the exposed length of the pulling ropes, driving the two positioning blocks to move inwards and disengage from the positioning grooves, and then the protective cover can be taken out by lifting upwards. Thus, the effect of convenient installation and disassembly of the protective cover is achieved.

[0014] In addition, for this lithium-ion battery cover plate assembly, by removing the sealing plug and injecting battery liquid into the liquid injection hole through a syringe, the battery liquid enters the connection frame through the liquid injection hole and then is discharged through multiple dispersion holes, achieving the effect of uniform discharge of the battery liquid. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of a lithium-ion battery cover plate assembly;

[0016] Figure 2 It is a schematic diagram of the structure of the cover plate body in a lithium-ion battery cover plate assembly;

[0017] Figure 3 It is a schematic sectional view of the cover plate body in a lithium-ion battery cover plate assembly;

[0018] Figure 4 It is a partial schematic sectional view of the overall structure in a lithium-ion battery cover plate assembly;

[0019] Figure 5 It is a schematic sectional view of the protection mechanism in a lithium-ion battery cover plate assembly;

[0020] Figure 6 It is a schematic diagram of the structure at position A in a lithium-ion battery cover plate assembly.

[0021] In the figure: 10, cover plate body; 11, positive electrode post; 12, negative electrode post; 13, explosion-proof component; 14, liquid injection hole; 15, insulating pad; 20, protection mechanism; 201, docking groove; 202, protective cover; 203, positioning box; 204, positioning block; 205, guiding groove; 206, guiding rod; 207, support spring; 208, U-shaped groove; 209, rotating rod; 210, pulling rope; 211, first guiding rod; 212, second guiding rod; 213, fixed ring; 214, spiral spring; 215, positioning groove; 30, connection frame; 31, dispersion hole; 32, sealing plug. Detailed Description of the Embodiment

[0022] Such asFigure 1 , 2 As shown in 2 , a lithium-ion battery cover assembly includes a cover body 10, on which a positive electrode column 11, a negative electrode column 12, an explosion-proof assembly 13, a liquid injection hole 14 and an insulating pad 15 are respectively arranged; a protection mechanism 20 is arranged outside the tops of the positive electrode column 11 and the negative electrode column 12, and the protection mechanism 20 includes a docking groove 201 opened on the top surface of the cover body 10, and a protection cover 202 is inserted into the docking groove 201.

[0023] Reference Figure 2 , 4 , 5, 6, positioning boxes 203 are respectively fixedly connected to the left and right sides of the protection cover 202, a positioning block 204 is slidably connected inside the positioning box 203, a support spring 207 is fixedly connected to the inner side of the positioning block 204, and the right side of the support spring 207 is fixedly connected to the inner side of the positioning box 203; a U-shaped groove 208 is opened inside the protection cover 202, and pull ropes 210 that can be lifted are respectively arranged on the left and right sides inside the U-shaped groove 208, and the pull ropes 210 are fixedly connected to the corresponding positioning blocks 204.

[0024] Preferably, a guiding groove 205 is opened on the inner side of the positioning block 204, a guiding rod 206 is slidably connected inside the guiding groove 205, and the inner side of the guiding rod 206 is fixedly connected to the positioning box 203. When the positioning block 204 moves, it will drive the guiding groove 205 to slide along the surface of the guiding rod 206, so as to achieve the effect of guiding the positioning block 204 during movement.

[0025] Preferably, the outer surface of the positioning block 204 is inclined to gradually become longer from bottom to top, and a positioning groove 215 is opened outside the docking groove 201; during use, the protection cover 202 is inserted into the docking groove 201, and when the protection cover 202 is inserted, the outer surface of the positioning block 204 contacts the surface of the docking groove 201, and the contact force causes the positioning block 204 to slide into the positioning box 203, and the support spring 207 is compressed. Until the positioning groove 215 corresponds to the position of the positioning block 204, the support spring 207 rebounds to drive the positioning block 204 to move outwards and insert into the positioning groove 215, thereby completing the installation of the protection cover 202.

[0026] Specifically, the top of the protective cover 202 is rotatably connected to a rotating rod 209, which extends downward through the surface of the protective cover 202 and is rotatably connected to the inside of the nip-shaped groove 208; the surfaces of the rotating rod 209 are respectively fixedly connected to two pull ropes 210; the left and right ends of the inner top side of the nip-shaped groove 208 are respectively fixedly connected to a first guide rod 211, and the left and right ends of the inner bottom side of the nip-shaped groove 208 are respectively fixedly connected to a second guide rod 212, the top of the first guide rod 211 contacts the surface of the pull rope 210, and the bottom of the second guide rod 212 contacts the surface of the pull rope 210, thereby achieving the effect of guiding the pull rope 210 when it is pulled.

[0027] Furthermore, a fixing ring 213 is provided on the outer side of the rotating rod 209, the bottom of the fixing ring 213 is fixedly connected to the shaped groove 208, a spiral spring 214 is provided inside the fixing ring 213, the outer end of the spiral spring 214 is fixedly connected to the surface of the fixing ring 213, and the inner end of the spiral spring 214 is fixedly connected to the surface of the rotating rod 209.

[0028] When the protective cover 202 needs to be removed, by rotating the rotating rod 209, the rotating rod 209 will partially reel up the pulling ropes 210 on the surface of the rotating rod 209 and deform the spiral spring 214, thereby shortening the exposed length of the pulling rope 210, thereby driving the two positioning blocks 204 to move inward to disengage from the positioning groove 215, and then the protective cover 202 can be removed by pulling upward; after loosening the rotating rod 209, the spiral spring 214 rebounds, driving the rotating rod 209 to reverse and unwind the pulling rope 210, thereby supporting the spring 207 to rebound and push the positioning block 204 out.

[0029] refer to Figure 3 The bottom of the cover body 10 is fixedly connected with a connection frame 30 , and the connection frame 30 is located directly below the injection hole 14 . A plurality of dispersed holes 31 are provided at the bottom of the connection frame 30 , and a closing plug 32 is inserted at the top of the injection hole 14 .

[0030] When in use, the sealing plug 32 is removed, and battery liquid is injected into the injection hole 14 through a syringe. The battery liquid enters the connection frame 30 through the injection hole 14 and then is discharged through the multiple dispersion holes 31, achieving the effect of uniform discharge of the battery liquid.

[0031] The working principle of the present utility model is as follows: The protective cover 202 is inserted into the docking groove 201. When the protective cover 202 is inserted, the outer surface of the positioning block 204 contacts the surface of the docking groove 201. The contact force causes the positioning block 204 to slide into the positioning box 203 and compresses the support spring 207. Until the positioning groove 215 corresponds to the position of the positioning block 204, the support spring 207 rebounds and drives the positioning block 204 to move outwards and insert into the positioning groove 215, thus completing the installation of the protective cover 202. By rotating the rotating rod 209, the rotating rod 209 partially winds up the two pulling ropes 210 on the surface of the rotating rod 209 and deforms the spiral spring 214, thereby shortening the exposed length of the pulling rope 210, driving the two positioning blocks 204 to move inwards and disengage from the positioning groove 215, and then the protective cover 202 can be taken out by lifting it upwards.

[0032] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A lithium-ion battery cover assembly, comprising a cover body (10), on which a positive electrode post (11), a negative electrode post (12), an explosion-proof component (13), a liquid injection hole (14) and an insulating pad (15) are respectively arranged, characterized in that, A protection mechanism (20) is provided on the outer sides of the tops of the positive electrode post (11) and the negative electrode post (12). The protection mechanism (20) includes a docking groove (201) opened on the top surface of the cover body (10). A protection cover (202) is inserted into the docking groove (201). Positioning boxes (203) are fixedly connected to both sides of the protection cover (202) respectively. A positioning block (204) is slidably connected inside the positioning box (203). A support spring (207) is fixedly connected to the inner side of the positioning block (204). The right side of the support spring (207) is fixedly connected to the inner side of the positioning box (203). A U-shaped groove (208) is opened inside the protection cover (202). Pulling ropes (210) that can be pulled are respectively arranged on the left and right sides inside the U-shaped groove (208). The pulling ropes (210) are fixedly connected to the corresponding positioning blocks (204).

2. The lithium-ion battery cover plate assembly according to claim 1, wherein A guiding groove (205) is opened on the inner side of the positioning block (204). A guiding rod (206) is slidably connected inside the guiding groove (205). The inner side of the guiding rod (206) is fixedly connected to the positioning box (203).

3. The lithium-ion battery cover plate assembly according to claim 1, characterized in that, The outer surface of the positioning block (204) is inclined such that it gradually becomes longer from bottom to top. A positioning groove (215) is opened on the outer side of the docking groove (201).

4. A lithium-ion battery cover assembly according to claim 1, characterized in that, A rotating rod (209) is rotatably connected to the top of the protection cover (202). The rotating rod (209) extends downward and penetrates through the surface of the protection cover (202) and is rotatably connected to the inside of the U-shaped groove (208). The rotating rod (209) is fixedly connected to the two pulling ropes (210) respectively. First guiding rods (211) are fixedly connected to the left and right ends of the top side inside the U-shaped groove (208). Second guiding rods (212) are fixedly connected to the left and right ends of the bottom side inside the U-shaped groove (208). The top of the first guiding rod (211) contacts the surface of the pulling rope (210). The bottom of the second guiding rod (212) contacts the surface of the pulling rope (210).

5. The lithium-ion battery cover plate assembly according to claim 4, wherein, A fixing ring (213) is arranged on the outer side of the rotating rod (209). The bottom of the fixing ring (213) is fixedly connected to the U-shaped groove (208). A spiral spring (214) is arranged inside the fixing ring (213). The outer end of the spiral spring (214) is fixedly connected to the surface of the fixing ring (213). The inner end of the spiral spring (214) is fixedly connected to the surface of the rotating rod (209).

6. The lithium-ion battery cover assembly according to claim 1, wherein, A connecting frame (30) is fixedly connected to the bottom of the cover body (10). The connecting frame (30) is located directly below the liquid injection hole (14). Multiple dispersion holes (31) are opened at the bottom of the connecting frame (30). A sealing plug (32) is inserted into the top of the liquid injection hole (14).

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