Battery cover assembly method

Abstract

The application relates to the technical field of battery cover plates and discloses a battery cover plate assembling method, which comprises the following assembling method: 1) a surrounding wall is arranged on a top cover sheet; 2) a pole has an upper section, a lower section and an outer peripheral wall, the outer peripheral wall is wrapped with a plastic insert, the top cover sheet has an annular part; a sealing ring is placed; 3) a positioning plate is placed on the outer peripheral wall; 4) the pole is fixed relative to the top cover sheet; 5) an upper plastic part is formed through injection molding, the upper plastic part has an inner annular part, and the inner annular part is wrapped around the outer periphery of the upper section; 6) a lower plastic part is arranged, and the lower plastic part is fixed relative to the top cover sheet; in the process of forming the upper plastic part through injection molding on the top cover sheet, the inner annular part of the upper plastic part is wrapped around the outer periphery of the upper section and abuts against the positioning plate, so that the injection molding of the upper plastic part is facilitated; secondly, the insulation between the pole and the top cover sheet is increased, so that the pole can bear large current; in addition, the structure is simple, the sealing and insulation effects are enhanced, the performance is good, and the assembling process is greatly simplified.

Description

Technical Field

[0001] This invention patent relates to the technical field of battery cover plates, and more specifically, to a battery cover plate assembly method. Background Technology

[0002] The battery cover is an important component of the battery. It includes a top cover plate, through which terminals are inserted. These terminals are connected to the battery cells and to external devices, thus enabling the battery to supply power.

[0003] The top cover plate has a raised enclosure wall that encloses and forms an enclosure area. The pole passes through the enclosure area. In addition, an upper plastic part is injection molded on the top cover plate. The upper plastic part wraps around the enclosure wall and around the upper part of the pole, so that the upper plastic part is relatively fixed on the top cover plate.

[0004] In the existing technology, it is difficult to achieve molding positioning during the injection molding process of the upper plastic part, which is not convenient for the injection molding of the upper plastic part. Summary of the Invention

[0005] The purpose of this invention is to provide a battery cover assembly method, which aims to solve the problem that the upper plastic part of the battery cover is not easy to be injection molded in the prior art.

[0006] This invention is implemented as follows: a battery cover assembly method, comprising the following assembly methods:

[0007] 1) Provide a top cover plate, wherein the top cover plate has pole holes arranged vertically through the pole holes, and the top cover plate is provided with an enclosing wall, which is arranged around the pole holes in a circumferential direction, and the enclosing wall encloses and forms an enclosing area.

[0008] 2) Provide an electrode post, the upper part of which has an upper section, the lower part of which has a lower section, and the middle part of which protrudes outward to form an outer peripheral wall, the outer peripheral wall being arranged around the circumference of the electrode post; a plastic insert is wrapped on the outer peripheral wall, and the top cover has an annularly arranged annular portion, the annular portion being located at the bottom of the enclosed area, the annular portion enclosing to form the electrode post hole;

[0009] A sealing ring is placed on the annular portion, the lower section passes through the pole hole, the upper section passes through the enclosed area, the outer peripheral wall presses against the sealing ring from top to bottom, and the plastic insert abuts against the sealing ring;

[0010] 3) Place a positioning plate on the top of the outer peripheral wall;

[0011] 4) Bend the upper part of the enclosure wall toward the enclosure area until the enclosure wall presses against the plastic insert from top to bottom, the pole post and the top cover plate are fixed relative to each other, and the sealing ring is compressed and deformed by compression.

[0012] 5) An upper plastic part is injection molded on the top cover plate. The upper plastic part wraps around the outer periphery of the enclosure wall and is arranged around the circumference of the enclosure wall. The upper plastic part has an inner ring portion, which wraps around the outer periphery of the upper section and presses against the positioning plate from top to bottom.

[0013] 6) A lower plastic part is arranged at the bottom of the top cover plate. The lower plastic part has a raised ring, which is embedded in the pole hole to fix the lower plastic part relative to the top cover plate.

[0014] Furthermore, in the assembly step 1), the top cover is integrally stamped.

[0015] Furthermore, in the assembly step 1), after the top cover piece is integrally stamped, the enclosing wall is arranged perpendicularly to the top cover piece, and the enclosing wall is upright. The upper part of the upright enclosing wall is pre-bent toward the enclosing area.

[0016] Furthermore, in assembly step 2), the annular portion is provided with a downwardly recessed groove, the recessed groove is arranged around the circumference of the annular portion, and the sealing ring covers the recessed groove from top to bottom; in assembly step 4), the sealing ring is compressed and deformed, and the bottom of the sealing ring is deformed and embedded in the recessed groove.

[0017] Furthermore, in the assembly step 4), during the process of bending the upper part of the enclosure wall toward the enclosure area, the enclosure wall presses against the plastic insert until the upper part of the enclosure wall is bent into a horizontal shape, so that the outer peripheral wall presses against the sealing ring from top to bottom and compresses and deforms, so that the pole post and the top cover plate are relatively fixed and sealed between the pole post and the top cover plate.

[0018] Furthermore, in the assembly step 4), the top of the enclosing wall has an end head. When the upper part of the enclosing wall is curved, the end head is arranged towards the upper section and is circumferentially spaced from the upper section.

[0019] In assembly step 5), after the upper plastic part is injection molded on the top cover plate, the inner ring is embedded in the annular gap and presses against the positioning plate from top to bottom. The upper plastic part has an outer ring, which wraps around the outer periphery of the enclosure wall. The inner ring and the outer ring clamp and wrap the enclosure wall from the inside and outside.

[0020] Furthermore, in the assembly step 5), after the upper plastic part is injection molded on the top cover plate, the inner ring portion wraps around the end head.

[0021] Furthermore, in assembly step 2), the plastic insert includes a longitudinal section and a horizontal section. The longitudinal section wraps around the outer periphery of the outer peripheral wall, and the horizontal section abuts against the top of the outer peripheral wall. In assembly step 3), the horizontal section abuts against the positioning plate, fixing the positioning plate to the outer peripheral wall.

[0022] In assembly step 4), when the upper part of the enclosure wall bends toward the enclosure area, the enclosure wall presses against the horizontal section from top to bottom, and the longitudinal section abuts against the inner sidewall of the enclosure wall.

[0023] Furthermore, in the assembly step 2), the outer circumference of the sealing ring is provided with an outer ring protruding outward, and the outer ring is arranged around the circumference of the sealing ring; when the outer circumferential wall abuts against the sealing ring from top to bottom, there is a deformation gap between the bottom of the outer ring and the annular part, the longitudinal section presses against the outer ring from top to bottom, and the outer ring is in a free state;

[0024] In assembly step 4), when the upper part of the enclosing wall bends toward the enclosing area, the sealing ring is squeezed and compressed toward the deformation interval.

[0025] Furthermore, in the assembly step 3), the top of the positioning plate is recessed downward to form a positioning groove, and a groove peripheral wall is formed on the outer periphery of the positioning groove. A curved channel is provided in the positioning plate, the inner end of the curved channel penetrates the groove peripheral wall, and the outer end of the curved channel penetrates the outer periphery of the positioning plate. Along the extension direction from the inner end to the outer end of the curved channel, the curved channel extends toward the plastic insert.

[0026] The positioning groove has a longitudinal shaft in the middle, the bottom of the longitudinal shaft is connected to the bottom of the positioning groove, and the top of the longitudinal shaft extends to the top of the positioning plate.

[0027] In assembly step 5), after the upper plastic part is formed by injection molding on the top cover plate, the inner ring portion wraps around the longitudinal shaft and is embedded in the curved channel, filling the curved channel.

[0028] Compared with the prior art, the battery cover assembly method provided by the present invention arranges a positioning plate on the top of the outer peripheral wall. When the terminal post and the top cover plate are fixed relative to each other, during the process of injection molding the upper plastic part on the top cover plate, the inner ring of the upper plastic part wraps around the outer periphery of the upper section and abuts against the positioning plate, which facilitates the injection molding of the upper plastic part.

[0029] Secondly, by setting an insulating positioning plate on the outer peripheral wall and having the inner ring of the upper plastic part wrapped around the outer periphery of the upper section, the insulation between the pole and the top cover plate can be increased so that the pole can withstand a large current.

[0030] In addition, the battery cover formed by the above assembly method has a simple structure, enhances sealing and insulation, has good performance, and greatly simplifies the assembly process. Attached Figure Description

[0031] Figure 1 This is a flowchart illustrating the battery cover assembly method provided by the present invention.

[0032] Figure 2 This is a cross-sectional schematic diagram of the battery cover plate provided by the present invention;

[0033] Figure 3 yes Figure 2 Enlarged diagram of point A in the diagram;

[0034] Figure 4 This is a three-dimensional exploded view of the battery cover assembly method provided by the present invention;

[0035] Figure 5 This is a cross-sectional schematic diagram of the positioning plate provided by the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0038] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0040] Battery cover assembly methods include the following:

[0041] 1) A top cover plate 100 is provided, the top cover plate 100 has a pole post hole 105 arranged vertically, and a enclosure wall 102 is provided on the top cover plate 100. The enclosure wall 102 is arranged around the pole post hole 105 in the circumference, and the enclosure wall 102 encloses and forms an enclosure area.

[0042] 2) Provide an electrode post 200, the upper part of the electrode post 200 has an upper section 201, the lower part of the electrode post 200 has a lower section 202, the middle part of the electrode post 200 protrudes outward to form an outer peripheral wall 203, the outer peripheral wall 203 is arranged around the circumference of the electrode post 200; a plastic insert 600 is wrapped on the outer peripheral wall 203, and the top cover plate 100 has an annular portion 104 arranged in a ring, the annular portion 104 is located at the bottom of the enclosed area, and the annular portion 104 encloses to form the electrode post hole 105;

[0043] A sealing ring 500 is placed on the annular portion 104, the lower section 202 is passed through the pole hole 105, the upper section 201 is inserted into the enclosed area, the outer peripheral wall 203 presses against the sealing ring 500 from top to bottom, and the plastic insert 600 abuts against the sealing ring 500.

[0044] 3) Place an insulating positioning plate 700 on the top of the outer peripheral wall 203;

[0045] 4) Bend the upper part of the enclosure wall 102 toward the enclosure area until the enclosure wall 102 presses against the plastic insert 600 from top to bottom, the pole post 200 and the top cover plate 100 are fixed relative to each other, and the sealing ring 500 is compressed and deformed by compression.

[0046] 5) An upper plastic part 300 is injection molded on the top cover plate 100. The upper plastic part 300 wraps around the outer periphery of the enclosure wall 102 and is arranged around the circumference of the enclosure wall 102. The upper plastic part 300 has an inner ring portion 302, which wraps around the outer periphery of the upper section 201 and presses against the positioning plate 700 from top to bottom.

[0047] 6) A lower plastic part 400 is arranged at the bottom of the top cover plate 100. The lower plastic part 400 has a raised ring 401, which is embedded in the pole hole 105 to fix the lower plastic part 400 relative to the top cover plate 100.

[0048] In the battery cover assembly method provided above, a positioning plate 700 is arranged on the top of the outer peripheral wall 203. After the terminal post 200 and the top cover plate 100 are fixed relative to each other, during the process of injection molding the upper plastic part 300 on the top cover plate 100, the inner ring of the upper plastic part 300 wraps around the outer periphery of the upper section 201 and abuts against the positioning plate 700, which facilitates the injection molding of the upper plastic part 300.

[0049] Secondly, by providing an insulating positioning plate 700 on the outer peripheral wall 203, and by having the inner ring portion 302 of the upper plastic part 300 wrapped around the outer periphery of the upper section 201, the insulation between the pole post 200 and the top cover plate 100 can be increased so that the pole post 200 can withstand a large current.

[0050] In addition, the battery cover formed by the above assembly method has a simple structure, enhances sealing and insulation, has good performance, and greatly simplifies the assembly process.

[0051] A plastic insert 600 is wrapped around the outer peripheral wall 203 of the pole post 200. This facilitates the assembly and positioning between the pole post 200 and the top cover plate 100, and when the enclosure wall 102 is bent, the pole post 200 and the top cover plate 100 can be relatively fixed.

[0052] In this embodiment, in assembly step 1), the top cover 100 is integrally stamped, which greatly simplifies the manufacturing process and improves assembly efficiency.

[0053] In this embodiment, in assembly step 1), after the top cover 100 is integrally stamped, the enclosure wall 102 is arranged perpendicularly to the top cover 100, and the enclosure wall 102 is upright. The upper part of the upright enclosure wall 102 is pre-bent toward the enclosure area.

[0054] The upright enclosure wall 102 is pre-bent. After the pole post 200 is inserted into the top cover plate 100, the enclosure wall 102 is then bent. In this way, the enclosure wall 102 can be pre-bent to facilitate the positioning of the pole post 200 in the top cover plate 100.

[0055] In this embodiment, during assembly step 2), the annular portion 104 is provided with a downward recessed groove 108, which is arranged around the circumference of the annular portion 104, and the sealing ring 500 covers the recessed groove 108 from top to bottom; during assembly step 4), the sealing ring 500 is compressed and deformed, and the bottom of the sealing ring 500 is deformed and embedded in the recessed groove 108.

[0056] In this way, when the sealing ring 500 is compressed and deformed, it is easy to fix the sealing ring 500. The sealing ring 500 is embedded in the recessed groove 108, which can increase the sealing performance and at the same time make the sealing ring 500 stably arranged.

[0057] In this embodiment, during assembly step 4), as the upper part of the enclosure wall 102 is bent toward the enclosure area, the enclosure wall 102 presses against the plastic insert 600 until the upper part of the enclosure wall 102 is bent into a horizontal shape, so that the outer peripheral wall 203 presses against the sealing ring 500 from top to bottom and compresses and deforms, so that the pole post 200 and the top cover plate 100 are relatively fixed, and the pole post 200 and the top cover plate 100 are sealed.

[0058] When the upper part of the enclosure wall 102 is bent into a horizontal shape, the enclosure wall 102 can better press against the plastic insert 600 from top to bottom, and simultaneously press against the pole post 200 from bottom to top, keeping the pole post 200 and the top cover plate 100 relatively fixed, and can compress and deform the sealing ring 500 to seal the pole post 200 and the top cover plate 100.

[0059] In this embodiment, during assembly step 4), the top of the enclosure wall 102 has an end head 103. When the upper part of the enclosure wall 102 is curved, the end head 103 is arranged toward the upper section 201 and is circumferentially spaced from the upper section 201.

[0060] In assembly step 5), after the upper plastic part 300 is injection molded on the top cover plate 100, the inner ring 302 is embedded in the annular gap and presses against the positioning plate 700 from top to bottom. The upper plastic part 300 has an outer ring 301, which wraps around the outer periphery of the enclosure wall 102. The inner ring 302 and the outer ring 301 clamp and wrap the enclosure wall 102 from the inside out.

[0061] In this way, after the enclosing wall 102 is bent, an annular gap is formed between the end head 103 and the upper section 201. Subsequently, during the injection molding process of the upper plastic part 300, the inner ring 302 of the upper plastic part 300 can be embedded through the annular gap and fill the enclosing area, that is, fill the annular gap, thereby wrapping the upper section 201 and abutting against the inner sidewall of the enclosing wall 102, so that the pole post 200 and the top cover plate 100 are insulated and fixed.

[0062] In this embodiment, during assembly step 5), after the upper plastic part 300 is injection molded on the top cover plate 100, the inner ring 302 wraps around the end head 103, thus making the connection between the inner ring 302 and the end head 103 stable and avoiding phenomena such as the inner ring 302 becoming loose in the ring.

[0063] In this embodiment, in assembly step 2), the plastic insert 600 includes a longitudinal section 602 and a horizontal section 603. The longitudinal section 602 wraps around the outer periphery of the outer peripheral wall 203, and the horizontal section 603 abuts against the top of the outer peripheral wall 203. In assembly step 3), the horizontal section 603 abuts against the positioning plate 700, fixing the positioning plate 700 to the outer peripheral wall 203.

[0064] In assembly step 4), when the upper part of the enclosure wall 102 bends toward the enclosure area, the enclosure wall 102 presses against the horizontal section 603 from top to bottom, and the longitudinal section 602 abuts against the inner sidewall of the enclosure wall 102.

[0065] The plastic insert 600 forms a longitudinal section 602 and a horizontal section 603. The longitudinal section 602 can wrap around the outer periphery of the outer peripheral wall 203, so that the pole post 200 can be positioned when it is inserted into the enclosed area. Secondly, the horizontal section 603 is placed on the top of the outer peripheral wall 203. When the positioning plate 700 is placed on the top of the outer peripheral wall 203, the horizontal section 603 abuts against the positioning plate 700, thereby fixing the positioning plate 700.

[0066] In this embodiment, during assembly step 2), an outer ring 501 protrudes outward from the outer periphery of the sealing ring 500, and the outer ring 501 is arranged around the circumference of the sealing ring 500. When the outer peripheral wall 203 abuts against the sealing ring 500 from top to bottom, there is a deformation gap 502 between the bottom of the outer ring 501 and the annular portion 104, and the longitudinal section 602 presses against the outer ring 501 from top to bottom, and the outer ring 501 is in a free state.

[0067] In assembly step 4), when the upper part of the enclosure wall 102 bends toward the enclosure area, the sealing ring 500 is squeezed and compressed toward the deformation interval 502.

[0068] An outer ring 501 is formed on the sealing ring 500. When the sealing ring 500 is compressed and deformed and fixed on the annular portion 104, there is a deformation gap 502 between the bottom of the outer ring 501 and the annular portion 104. That is, the outer ring 501 is in a free state at this time. The sealing ring 500 that has been compressed and deformed can protrude and deform toward the deformation gap 502.

[0069] In this embodiment, in assembly step 3), the top of the positioning plate 700 is recessed downward to form a positioning groove 701. A groove peripheral wall 703 is formed on the outer periphery of the positioning groove 701. A curved channel 704 is provided in the positioning plate 700. The inner end of the curved channel 704 penetrates the groove peripheral wall 703, and the outer end of the curved channel 704 penetrates the outer periphery of the positioning plate 700. Along the extension direction from the inner end to the outer end of the curved channel 704, the curved channel 704 extends toward the plastic insert 600.

[0070] The positioning groove 701 has a longitudinal shaft 702 in the middle, the bottom of the longitudinal shaft 702 is connected to the bottom of the positioning groove 701, and the top of the longitudinal shaft 702 extends to the top of the positioning plate 700.

[0071] In assembly step 5), after the upper plastic part 300 is formed by injection molding on the top cover plate 100, the inner ring 302 wraps around the longitudinal shaft 702, and the inner ring 302 is embedded in the curved channel 704, filling the curved channel 704.

[0072] Thus, during the injection molding of the upper plastic part 300, the inner ring portion 302 passes through the curved channel 704 and is embedded in the curved channel 704, so that the inner ring portion 302 and the positioning plate 700 are more firmly bonded. Secondly, the inner ring portion 302 wraps around the longitudinal axis 702, which can guide the injection flow of the upper plastic part 300, so that the inner ring portion 302 of the upper plastic part 300 fills the annular interval, and the bonding area between the inner ring portion 302 and the positioning plate 700 is larger, and the bonding is more stable.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery cover assembly method, characterized in that, The assembly process includes the following steps: 1) Provide a top cover plate, wherein the top cover plate has pole holes arranged vertically through the pole holes, and the top cover plate is provided with an enclosing wall, which is arranged around the pole holes in a circumferential direction, and the enclosing wall encloses and forms an enclosing area. 2) Provide an electrode post, the upper part of which has an upper section, the lower part of which has a lower section, and the middle part of which protrudes outward to form an outer peripheral wall, the outer peripheral wall being arranged around the circumference of the electrode post; a plastic insert is wrapped on the outer peripheral wall, and the top cover has an annularly arranged annular portion, the annular portion being located at the bottom of the enclosed area, the annular portion enclosing to form the electrode post hole; A sealing ring is placed on the annular portion, the lower section passes through the pole hole, the upper section passes through the enclosed area, the outer peripheral wall presses against the sealing ring from top to bottom, and the plastic insert abuts against the sealing ring; 3) Place a positioning plate on the top of the outer peripheral wall; 4) Bend the upper part of the enclosure wall toward the enclosure area until the enclosure wall presses against the plastic insert from top to bottom, the pole post and the top cover plate are fixed relative to each other, and the sealing ring is compressed and deformed by compression. 5) An upper plastic part is injection molded on the top cover plate. The upper plastic part wraps around the outer periphery of the enclosure wall and is arranged around the circumference of the enclosure wall. The upper plastic part has an inner ring portion, which wraps around the outer periphery of the upper section and presses against the positioning plate from top to bottom. 6) A lower plastic part is arranged at the bottom of the top cover plate. The lower plastic part has a raised ring, which is embedded in the pole hole to fix the lower plastic part relative to the top cover plate. In assembly step 2), the plastic insert has a horizontal section that abuts against the top of the outer peripheral wall, and the end of the horizontal section is provided with a recessed groove; the plastic insert has an outer side wall facing the enclosing wall, and a plurality of protrusions are provided on the outer side wall, and adjacent protrusions are arranged in a laterally staggered manner along the bottom-up direction of the plastic insert; an open-loop annular groove is formed between the bottom of the protrusion and the outer side wall. In assembly step 3), when the enclosing wall is bent, the protrusion abuts against the enclosing wall and forms an outer gap with the enclosing wall. In assembly step 4), after the upper plastic part is injection molded on the top cover plate, the upper plastic part is embedded in the recessed groove, the upper plastic part fills the outer space, fills the annular groove, and wraps around the multiple protrusions.

2. The battery cover assembly method as described in claim 1, characterized in that, In assembly step 1), the top cover is integrally stamped.

3. The battery cover assembly method as described in claim 2, characterized in that, In the assembly step 1), after the top cover piece is integrally stamped, the enclosing wall is arranged perpendicularly to the top cover piece, and the enclosing wall is upright. The upper part of the upright enclosing wall is pre-bent toward the enclosing area.

4. The battery cover assembly method according to any one of claims 1 to 3, characterized in that, In assembly step 2), the annular portion is provided with a downward recessed groove, the recessed groove is arranged around the circumference of the annular portion, and the sealing ring covers the recessed groove from top to bottom; in assembly step 4), the sealing ring is compressed and deformed, and the bottom of the sealing ring is deformed and embedded in the recessed groove.

5. The battery cover assembly method according to any one of claims 1 to 3, characterized in that, In assembly step 4), during the process of bending the upper part of the enclosure wall toward the enclosure area, the enclosure wall presses against the plastic insert until the upper part of the enclosure wall is bent into a horizontal shape, so that the outer peripheral wall presses against the sealing ring from top to bottom and compresses and deforms, so that the pole post and the top cover plate are relatively fixed and sealed between the pole post and the top cover plate.

6. The battery cover assembly method according to any one of claims 1 to 3, characterized in that, In assembly step 4), the top of the enclosure wall has an end head. When the upper part of the enclosure wall is curved, the end head is arranged towards the upper section and is circumferentially spaced from the upper section. In assembly step 5), after the upper plastic part is injection molded on the top cover plate, the inner ring is embedded in the annular gap and presses against the positioning plate from top to bottom. The upper plastic part has an outer ring, which wraps around the outer periphery of the enclosure wall. The inner ring and the outer ring clamp and wrap the enclosure wall from the inside and outside.

7. The battery cover assembly method as described in claim 6, characterized in that, In assembly step 5), after the upper plastic part is injection molded on the top cover plate, the inner ring portion wraps around the end head.

8. The battery cover assembly method according to any one of claims 1 to 3, characterized in that, In assembly step 2), the plastic insert includes a longitudinal section and a horizontal section. The longitudinal section wraps around the outer periphery of the outer peripheral wall, and the horizontal section abuts against the top of the outer peripheral wall. In assembly step 3), the horizontal section abuts against the positioning plate, fixing the positioning plate to the outer peripheral wall. In assembly step 4), when the upper part of the enclosure wall bends toward the enclosure area, the enclosure wall presses against the horizontal section from top to bottom, and the longitudinal section abuts against the inner sidewall of the enclosure wall.

9. The battery cover assembly method as described in claim 8, characterized in that, In assembly step 2), an outer ring protrudes outward from the outer periphery of the sealing ring, and the outer ring is arranged around the circumference of the sealing ring; when the outer peripheral wall abuts against the sealing ring from top to bottom, there is a deformation gap between the bottom of the outer ring and the annular part, the longitudinal section presses against the outer ring from top to bottom, and the outer ring is in a free state. In assembly step 4), when the upper part of the enclosing wall bends toward the enclosing area, the sealing ring is squeezed and compressed toward the deformation interval.

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