Cylindrical battery pack end cover mounting structure

Abstract

The utility model discloses a cylindrical battery pack end cover mounting structure, which belongs to the technical field of lithium batteries, solves the problems of narrow end cover applicability, easy deviation of a protective plate and poor protectiveness in the prior art, and comprises an upper end cover and a lower end cover which are embedded up and down, and a plurality of upper end cover lithium battery monomer assembly holes are formed in the end surface of the inner wall of the upper end cover; a communication groove is formed in the back of the lower end cover, a welding row is arranged in the communication groove, a protection plate is arranged on the back of the lower end cover, a base is arranged on the outer side of the protection plate, and a fixing assembly for fixing the protection plate is arranged in the base. According to the utility model, the plurality of lithium battery monomers are arranged between the upper end cover and the lower end cover, and the welding row is assembled in the communicating groove, so that the plurality of lithium battery monomers can be quickly mounted in the end covers, the application range of mounting of the end covers is expanded, the fixing component is arranged in the base, and the protective plate is fixed by the fixing bracket, so that the protective plate is fixed and does not deviate; and an insulation protection effect is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery technical field, concretely, especially relates to a cylindrical battery pack end cover mounting structure. BACKGROUND

[0002] Lithium battery is a kind of battery with lithium metal or lithium alloy as negative electrode material and using non-aqueous electrolyte solution, due to the high energy, long service life, high rated voltage, low self-discharge rate and other advantages of lithium battery, it is widely used in various industries.Lithium battery pack is assembled by multiple lithium battery monomers, under the condition of meeting safety demand, different voltage and power output requirements are realized by using series and parallel connection, but due to the structure of lithium battery monomer, the negative electrode is uneven, and the positive electrode welding surface is thin, so different end cover mounting structures need to be redesigned.At the same time, as rechargeable battery, lithium battery is usually repeatedly used, when the lithium battery is low in power, the lithium battery is charged, and a large amount of heat is generated when the lithium battery is charged, and when overcharged, explosion, fire and other dangerous conditions are prone to occur due to high temperature, and the lithium battery pack is provided with a protective shell, in order to avoid the situation of electric shock at the terminal insertion port, the protective plate is usually fixed on the edge of the insertion port on the protective shell, such as EVA plate or barley paper.But with the extension of use time, the protective plate will be offset, resulting in the decline of protection performance. SUMMARY

[0003] The utility model discloses a kind of end cover mounting structures of cylindrical battery pack, to solve the problems that the prior art exists, such as the end cover applicability, the protective plate is not easy to offset, and the protective plate is not easy to offset, and the protective plate is not easy to offset.

[0004] In order to achieve the above technical purpose, the utility model discloses a kind of end cover mounting structures of cylindrical battery pack, the technical scheme is as follows:

[0005] An end cover mounting structure of cylindrical battery pack, comprising an upper end cover and a lower end cover that are embedded one above the other, a plurality of upper end cover lithium battery monomer assembly holes are provided on the inner wall end face of the upper end cover, a lithium battery monomer is provided in the upper end cover lithium battery monomer assembly hole, the upper part of the lithium battery monomer is assembled in the upper end cover lithium battery monomer assembly hole, and the lower part is assembled in the lower end cover lithium battery monomer assembly hole opened on the surface of the lower end cover, a communication groove is provided on the back of the lower end cover to communicate the lower end cover monomer assembly holes, a welding row for connecting the plurality of lithium battery monomers in series or parallel is provided at the bottom of the communication groove, a protective plate is provided on the back of the lower end cover to cover the communication groove, a base is provided on the outer side of the protective plate, a fixing assembly for fixing the protective plate is provided in the base, the fixing assembly comprises a fixing bracket inserted into the base and a protective plate slot for mounting the fixing bracket, the protective plate slot comprises a plurality of evenly spaced clamping blocks, a fixing column is provided on the outer side of the clamping blocks at both ends, a insertion hole is provided in the fixing column, the fixing column at the bottom of the fixing bracket is inserted into the insertion hole, and a fixing plate is provided around the plurality of clamping blocks.

[0006] Preferably, the lower end cover lithium battery monomer assembly hole is matched with the upper end cover lithium battery monomer assembly hole one by one.

[0007] Preferably, the welding row is provided with a stamping protrusion on the end face in contact with the lithium battery monomer, and the stamping protrusion is provided with a welding hole.

[0008] Preferably, the back of the fixed plate is provided with a shaped reinforcing rib.

[0009] Preferably, the fixed support is made of an engineering plastic alloy material.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model discloses a plurality of lithium battery monomers are arranged between the upper and lower end covers, and the welding row is assembled in the communicating groove, so that the plurality of lithium battery monomers can be quickly installed in the end cover, the application range of the end cover installation is expanded, the series connection or parallel connection of the monomers is realized quickly, and the grouping of the plurality of lithium battery monomers is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] Figure 2 It is the structural schematic diagram of the upper end cover in the utility model;

[0014] Figure 3 It is the structural schematic diagram of the lower end cover in the utility model;

[0015] Figure 4 It is the structural schematic diagram of the base in the utility model.

[0016] In the drawing: 1. upper end cover;2. lower end cover;3. upper end cover lithium battery monomer assembly hole;4. lithium battery monomer;5. lower end cover lithium battery monomer assembly hole;6. communicating groove;7. welding row;8. protection plate;9. base;10. fixed support;11. clamping block;12. fixed column;13. fixed plate;14. stamping protrusion;15. reinforcing rib. DETAILED DESCRIPTION

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 — Figure 4 As shown, a cylindrical battery pack end cap mounting structure includes an upper end cap 1 and a lower end cap 2 that fit together. The inner wall of the upper end cap 1 has multiple upper end cap lithium battery cell assembly holes 3. Lithium battery cells 4 are installed within the upper end cap lithium battery cell assembly holes 3. The upper part of each lithium battery cell 4 is assembled within the upper end cap lithium battery cell assembly hole 3, and the lower part is assembled within the lower end cap lithium battery cell assembly hole 5 on the surface of the lower end cap 2. The lower end cap lithium battery cell assembly holes 5 and the upper end cap lithium battery cell assembly holes 3 are matched one-to-one. The back of the lower end cap 2 has a connecting groove 6 that connects the lower end cap lithium battery cell assembly holes 5. The bottom of the connecting groove 6 has a groove for multiple... A welding array 7 consisting of lithium battery cells 4 connected in series or parallel; a protective plate 8 covering a connecting groove 6 is provided on the back of the lower end cover 2; a base 9 is provided on the outside of the protective plate 8; a fixing assembly for fixing the protective plate 8 is provided inside the base 9; the fixing assembly includes a fixing bracket 10 inserted into the base 9 and a protective plate slot for mounting the fixing bracket 10; the protective plate slot includes multiple evenly spaced locking blocks 11; fixing posts 12 are provided on the outside of the locking blocks 11 at both ends; insertion holes are provided in the fixing posts 12; the bottom insertion post of the fixing bracket 10 is inserted into the insertion hole; a fixing plate 13 is provided around the multiple locking blocks 11; and a shaped reinforcing rib 15 is provided on the back of the fixing plate 13.

[0019] This utility model arranges multiple lithium battery cells 4 between the upper end cover 1 and the lower end cover 2. The ends of the lithium battery cells 34 are respectively fixed in the lithium battery cell assembly holes 3 and 5 of the upper end cover and the lower end cover. The welding strip 7 is assembled in the connecting groove 6 to ensure that each lithium battery cell 4 can be connected to the welding strip 7, thereby realizing that multiple lithium battery cells 4 can be effectively installed in the end cover. The multiple lithium battery cells 4 are connected in series or in parallel to form a group. The protection plate 8 is supported by the fixing bracket 10 to prevent the protection plate 8 from shifting. The pins on the fixing bracket 10 are inserted into the insertion holes 13. The locking block 11 abuts against the bottom of the fixing bracket 10, which enhances the stability of the fixing bracket 10 and improves the convenience of installation and disassembly.

[0020] In this invention, the end face of the welding strip 7 that contacts the lithium battery cell 4 is provided with a stamped protrusion 14, and the stamped protrusion 14 is provided with a welding hole.

[0021] The fixed support 10 is made of engineering plastic alloy material, and effectively plays an insulation role and enhances protection due to the material property.

[0022] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and are non-limiting, the scope of the present application being defined by the appended claims rather than by the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A cylindrical battery pack end cover mounting structure comprising an upper end cover and a lower end cover which are fitted into each other in the up and down direction, characterized in that: The upper end cover inner wall end face is provided with a plurality of upper end cover lithium battery monomer assembly holes, the upper end cover lithium battery monomer assembly holes are provided with lithium battery monomers, the lithium battery monomers are assembled in the upper end cover lithium battery monomer assembly holes, and the lower parts of the lithium battery monomers are assembled in the lower end cover lithium battery monomer assembly holes opened on the lower end cover surface; the lower end cover back part is provided with a communication groove for communicating the lower end cover monomer assembly holes; the communication groove bottom part is provided with a welding row for connecting the plurality of lithium battery monomers in series or in parallel; the lower end cover back part is provided with a protection plate covering the communication groove; the protection plate outer side is provided with a base; the base is provided with a fixing assembly for fixing the protection plate; the fixing assembly comprises a fixing support inserted into the base and a protection plate slot position for installing the fixing support; the protection plate slot position comprises a plurality of uniformly spaced clamping blocks; the clamping block outer sides at both ends are provided with fixing columns; the fixing columns are provided with insertion holes; the fixing support bottom part insertion columns are inserted into the insertion holes; and the clamping block peripheries are provided with fixing plates.

2. The cylindrical battery pack end cover mounting structure according to claim 1, wherein: The lower end cover lithium battery monomer assembly holes are matched with the upper end cover lithium battery monomer assembly holes one by one.

3. The cylindrical battery pack end cover mounting structure according to claim 1, wherein: The welding row end face in contact with the lithium battery monomers is provided with a stamping protrusion, and the stamping protrusion is provided with a welding hole.

4. The cylindrical battery pack end cover mounting structure according to claim 1, wherein: The fixing plate back part is provided with a shaped reinforcing rib.

5. The cylindrical battery pack end cover mounting structure according to claim 1, wherein: The fixing support is made of an engineering plastic alloy material.

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