Battery cover plate assembly and battery

Abstract

The utility model discloses a battery cover plate assembly and a battery. The battery cover plate assembly comprises a cover plate main body, a pole, a first plastic part, a sealing part and a welding part, the cover plate main body is provided with a first end face and a second end face which are oppositely arranged, the cover plate main body is provided with a pole mounting hole, the pole is assembled into the pole mounting hole from one side of the first end face of the cover plate main body, a first plastic part is formed outside the side wall of the pole through injection molding, and the first plastic part is arranged at the first end face; a welding groove communicated with the pole mounting hole is formed in the position, close to the second end face, of the cover plate body, the welding part is assembled in the welding groove, and a first annular protruding part is arranged on the side, close to the pole, of the welding part; the sealing piece is provided with a first annular concave part, the sealing piece is assembled between the pole and the welding piece, and the first annular convex part and the first annular concave part are matched in a concave-convex manner. According to the battery cover plate assembly, high-temperature melting of the first plastic part in the welding process of the welding part can be effectively prevented, the yield of the battery cover plate assembly is improved, and the cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery cover assembly and a battery. Background Technology

[0002] In current battery structures, battery cover assemblies typically include a top cover, positive terminal, negative terminal, upper plastic, and welding ring. The top cover has two mounting holes for the positive and negative terminals. The upper plastic is fitted around the outer periphery of the positive and negative terminals and located on the outer end face of the top cover. The welding ring is also located on the outer end face of the top cover. Because the welding ring is close to the upper plastic, the upper plastic is prone to melting due to high temperature during the laser welding process of the welding ring, which leads to increased product defect rate and cost. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a battery cover assembly and a battery.

[0004] In a first aspect, this utility model provides a battery cover assembly, comprising: a cover body, a terminal post, a first plastic part, a sealing part, and a welded part, wherein...

[0005] The cover plate body has a first end face and a second end face that are disposed opposite to each other. The cover plate body has a pole mounting hole that penetrates the first end face and the second end face. The pole is fitted into the pole mounting hole from one side of the first end face of the cover plate body and protrudes from the first end face.

[0006] The first plastic part is injection molded on the side wall of the pole post, and the first plastic part is disposed at the first end face of the cover plate body.

[0007] The cover plate body is provided with a welding groove that communicates with the pole mounting hole near the second end face. The welding part is arranged in a ring and assembled in the welding groove. The welding part is provided with a first annular protrusion on the side near the pole.

[0008] The sealing element is arranged in a ring shape and has a first annular recess. The sealing element is assembled between the pole post and the welded part, and the first annular protrusion and the first annular recess match along the axial direction of the pole post.

[0009] The battery cover assembly provided by this utility model has a simple structure. The first plastic part and the welded part are respectively set on the two opposite end faces of the cover body, which effectively prevents the first plastic part from melting at high temperature during the welding process of the welded part, improves the yield of the battery cover assembly in the welding process and reduces costs. Moreover, the cooperation between the welded part and the sealing part through the first annular protrusion and the first annular recess increases the support stability of the sealing part and improves the sealing reliability of the terminal post and the welded part.

[0010] In addition, the battery cover assembly of this utility model may also have the following additional technical features:

[0011] Preferably, the welded component is further provided with an annular groove, and the first annular protrusion is closer to the pole post relative to the annular groove.

[0012] Preferably, the welded component has a first chamfer at the edge of the first annular protrusion, and the first chamfer is inclined from the end face of the welded component away from the first plastic component to the side near the pole mounting hole.

[0013] Preferably, the cover plate body is provided with a pole post protruding ring protruding from the first end face at the pole post mounting hole, and the pole post passes through the pole post mounting hole and the pole post protruding ring in sequence, and protrudes relative to the pole post protruding ring;

[0014] The first plastic part is disposed between the electrode post and the electrode post protrusion ring, and the first plastic part covers the outer surface of the electrode post protrusion ring.

[0015] Preferably, the end of the pole post protrusion away from the first end face of the cover plate body is provided with an annular pressing part extending inward along the circumference of the pole post mounting hole.

[0016] Preferably, the first plastic part includes an annular top wall, and the bottom of the annular top wall is provided with a concentric first annular side wall and a second annular side wall;

[0017] The first annular sidewall is sealed to the pole post, and an annular assembly groove is formed between the first annular sidewall and the second annular sidewall, and the pole post protrusion is assembled in the annular assembly groove.

[0018] Preferably, the pole post protrusion is provided with at least one first anti-rotation groove extending perpendicular to the pole post axial direction, and a first anti-rotation boss is provided between the first annular sidewall and the second annular sidewall, the first anti-rotation boss and the first anti-rotation groove being inserted into each other perpendicular to the pole post axial direction.

[0019] Preferably, an annular boss is provided on the outer side wall of the pole post, and at least one second anti-rotation groove is provided on the annular boss. A second anti-rotation boss matching the second anti-rotation groove is provided on the first annular side wall, and the second anti-rotation groove and the second anti-rotation boss are inserted into each other along the axis perpendicular to the pole post.

[0020] Preferably, a second plastic part is further provided on the side of the cover plate body near the second end face, and the second plastic part covers the second end face;

[0021] The second plastic part has a through hole at the position corresponding to the pole mounting hole, which extends along the pole axis. The pole passes through the through hole and protrudes from the end face of the second plastic part away from the welded part, and the protrusion height of the pole relative to the second plastic part is 0.1mm~0.5mm.

[0022] Preferably, the second plastic part has a second annular protrusion at the through hole, and the second annular protrusion is pressed against the sealing member along the axial direction of the pole post.

[0023] Preferably, the second plastic part has a second annular recess on the side near the welded part, and the second annular recess forms a second annular protrusion on the side near the pole post.

[0024] Preferably, the second plastic part has a second chamfer at the second annular protrusion, and the second chamfer is inclined from the end face of the second annular protrusion near the seal to the side near the through hole.

[0025] A second aspect of this utility model provides a battery, characterized in that the battery includes the battery cover assembly described in any embodiment of this application.

[0026] A third aspect of this utility model is to provide an electrical device, which includes the battery described in any embodiment of this application.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 A perspective structural diagram of the battery cover assembly provided in the embodiments of this application;

[0030] Figure 2 An exploded view of the battery cover assembly provided in an embodiment of this application;

[0031] Figure 3 A top view of the battery cover assembly provided in an embodiment of this application;

[0032] Figure 4 A bottom view of the battery cover assembly provided in an embodiment of this application;

[0033] Figure 5 A cross-sectional view of the battery cover assembly provided in an embodiment of this application;

[0034] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0035] Figure 7 A three-dimensional structural diagram of the welded component provided in the embodiments of this application;

[0036] Figure 8 A cross-sectional view of the welded component provided in the embodiments of this application;

[0037] Figure 9 A perspective view of the sealing element provided in the embodiments of this application;

[0038] Figure 10 A perspective structural diagram of the cover plate body provided in the embodiments of this application;

[0039] Figure 11 A cross-sectional view of the cover plate body provided in an embodiment of this application;

[0040] Figure 12 A perspective view of the first plastic part provided in the embodiments of this application;

[0041] Figure 13 A bottom view of the first plastic part provided in the embodiments of this application;

[0042] Figure 14 A cross-sectional view of the first plastic part provided in the embodiments of this application;

[0043] Figure 15 A three-dimensional structural diagram of the pole provided in the embodiments of this application;

[0044] Figure 16 A top view of the pole provided in an embodiment of this application;

[0045] Figure 17 A cross-sectional view of the pole provided in an embodiment of this application;

[0046] Figure 18 A partial three-dimensional structural view of the second plastic part provided in the embodiments of this application;

[0047] Figure 19 A cross-sectional view of the second plastic part provided in the embodiments of this application;

[0048] Figure 20 for Figure 19 Enlarged view of section B in the middle.

[0049] In the above image:

[0050] 100 Battery cover assembly;

[0051] 110 Cover plate body; 111 First end face; 112 Second end face; 113 Pole mounting hole; 114 Welding groove; 115 Pole protruding ring; 1150 First anti-rotation groove; 116 Annular clamping part; 117 Injection hole; 118 Explosion-proof valve; 119 Protective plate;

[0052] 120 Pole post; 121 Annular boss; 1210 Second anti-rotation groove;

[0053] 130 First plastic part; 131 Circular top wall; 132 First annular side wall; 133 Second annular side wall; 134 Annular assembly groove; 135 First anti-rotation boss; 136 Second anti-rotation boss;

[0054] 140 Welded part; 141 First annular protrusion; 142 Annular groove; 143 First chamfer;

[0055] 150 Seal; 151 First annular seal; 152 Second annular seal; 153 First annular recess;

[0056] 160 Second plastic part; 161 Through hole; 162 Second annular protrusion; 163 Second annular recess; 164 Second chamfer. Detailed Implementation

[0057] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0059] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0060] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".

[0061] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0062] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0063] like Figures 1 to 20 As shown, in a first aspect, this utility model provides a battery cover assembly 100, comprising: a cover body 110, a terminal post 120, a first plastic part 130, a sealing part 150, and a welding part 140, wherein,

[0064] The cover plate body 110 has a first end face 111 and a second end face 112 disposed opposite to each other. The cover plate body 110 has a pole mounting hole 113 that penetrates the first end face 111 and the second end face 112. The pole 120 is fitted into the pole mounting hole 113 from one side of the first end face 111 of the cover plate body 110 and protrudes from the first end face 111.

[0065] The first plastic part 130 is injection molded on the side wall of the pole post 120, and the first plastic part 130 is disposed at the first end face 111 of the cover plate body 110.

[0066] The cover plate body 110 is provided with a welding groove 114 that communicates with the pole mounting hole 113 near the second end face 112. The welding part 140 is arranged in a ring and assembled in the welding groove 114. The welding part 140 is provided with a first annular protrusion 141 on the side near the pole 120.

[0067] The sealing element 150 is arranged in an annular shape and has a first annular recess 153. The sealing element 150 is assembled between the pole post 120 and the welded part 140, and the first annular protrusion 141 and the first annular recess 153 are matched along the axial direction of the pole post 120.

[0068] like Figures 1 to 5 ,like Figure 10 and Figure 11 As shown, the cover plate body 110 has a square sheet structure. The cover plate body 110 has a first end face 111 and a second end face 112 arranged opposite to each other along its own thickness direction. The cover plate body 110 has two pole mounting holes 113, each pole mounting hole 113 penetrating the first end face 111 and the second end face 112 respectively. The pole 120 includes a positive pole and a negative pole. The positive pole is fitted into one pole mounting hole 113 and partially protrudes from the first end face 111 to be convex relative to the first end face 111. A first plastic part 130 is injection molded on the side wall of the positive pole near the first end face 111. The negative pole is fitted into the other pole mounting hole 113 and partially protrudes from the first end face 111 to be convex relative to the first end face 111. Another first plastic part 130 is injection molded on the side wall of the negative pole near the first end face 111. Each first plastic part 130 is fixed to the first end face 111 of the cover plate body 110.

[0069] like Figures 1 to 5 ,like Figure 10 and Figure 11 As shown, a welding groove 114 is provided near the second end face 112 of the cover plate body 110. The welding groove 114 communicates with the terminal mounting hole 113 and forms a stepped groove structure that is narrower at the top and wider at the bottom. The welding component 140 is assembled in the welding groove 114. The welding component 140 is made of metal, such as aluminum or iron, which facilitates welding and fixing to the cover plate body 110 by laser welding. The welding component 140 has an annular cavity inside, which facilitates the installation of the terminal 120 and the sealing component 150. The welding component 140 is located at the second end face 112 of the cover plate body 110, and the first plastic component 130 is located at the first end face 111 of the cover plate body 110. This can effectively avoid damage such as melting of the first plastic component 130 corresponding to the positive and negative terminals due to the high temperature caused by laser welding of the welding component 140, reduce the welding defect rate, improve the service life of the first plastic component 130, and ensure the safety of the battery.

[0070] like Figure 2 , Figures 5 to 8 As shown, a first annular protrusion 141 is fixedly provided inside the welded part 140 near the pole post 120. The first annular protrusion 141 is fixedly connected to the welded part 140 by welding, integral molding or other methods. The first annular protrusion 141 extends from the end face of the welded part 140 along the axial direction of the pole post 120 towards the side near the first plastic part 130 and protrudes relative to the second end face, so that the first annular protrusion 141 has a contact surface that is further away from the second end face 112 relative to the welded part 140. This contact surface can seal with the first annular recess 153 of the sealing part 150.

[0071] like Figure 5 , Figure 6 , Figure 9 As shown, the sealing element 150 is made of elastic material such as rubber. The bottom of the sealing element 150 is concentrically provided with a first annular sealing part 151 and a second annular sealing part 152. A first annular recess 153 is formed between the first annular sealing part 151 and the second annular sealing part 152. The first annular sealing part 151 is disposed between the side of the pole post 120 and the welded part 140. The first annular protrusion 141 of the welded part 140 is sealed and fitted in the first annular recess 153, and the two are matched in a concave-convex manner along the axial direction of the pole post 120. The structural design of the sealing element 150 enhances the sealing performance between the welded part 140 and the pole post 120, and the sealing element 150 has strong firmness and stability.

[0072] It should be noted that, along the axial direction of the pole post 120, the height of the first annular sealing part 151 is greater than the height of the second annular sealing part 152, so that the lower end face of the first annular sealing part 151 can be flush with the lower end face of the welded part 140. The lower end face refers to the end face away from the first plastic part 130.

[0073] The battery cover assembly 100 provided by this utility model has a simple structure. The first plastic part 130 and the welded part 140 are respectively disposed on the two opposite end faces of the cover body 110, which effectively prevents the first plastic part 130 from melting at high temperature during the welding process of the welded part 140, improves the yield of the battery cover assembly 100 in the welding process and reduces costs. Moreover, the cooperation between the welded part 140 and the sealing part 150 through the first annular protrusion 141 and the first annular recess 153 increases the support stability of the sealing part 150 and improves the sealing reliability of the terminal post 120 and the welded part 140.

[0074] In some implementations, such as Figure 7 and Figure 8 As shown, the welded part 140 is also provided with an annular groove 142, and the first annular protrusion 141 is closer to the pole post 120 than the annular groove 142.

[0075] Specifically, an annular groove 142 is provided on the end face of the welded part 140 near the first plastic part 130 and near the pole post 120. The annular groove 142 forms a first annular protrusion 141 on the side near the pole post 120. The annular groove 142 is configured to reserve installation space for the assembly of the sealing part 150, and after the sealing part 150 is assembled, the side of the welded part 140 away from the first plastic part 130 remains flush, which facilitates the subsequent assembly of the second plastic part 160.

[0076] In some implementations, such as Figure 8As shown, the welded component 140 has a first chamfer 143 at the edge of the first annular protrusion 141. The first chamfer 143 is inclined from the end face of the welded component 140 away from the first plastic component 130 to the side near the pole mounting hole 113. In this example, the inclined first chamfer 143 facilitates the subsequent installation of the second plastic component 160.

[0077] In some implementations, such as Figure 5 , Figure 6 , Figure 10 and Figure 11 As shown, the cover plate body 110 is provided with a pole post protrusion ring 115 protruding from the first end face 111 at the pole post mounting hole 113. The pole post 120 passes through the pole post mounting hole 113 and the pole post protrusion ring 115 in sequence, and protrudes from the pole post protrusion ring 115.

[0078] The first plastic part 130 is partially disposed between the pole post 120 and the pole post protrusion ring 115, and the portion of the first plastic part 130 covers the outer surface of the pole post protrusion ring 115.

[0079] Specifically, the cover plate body 110 is provided with pole post protrusions 115 at each pole post mounting hole 113. The pole post protrusions 115 extend along the axial direction of the pole post 120 from the first end face 111 of the cover plate body 110 to a position away from the first end face 111. The pole post 120 passes through the pole post protrusions 115 and partially extends out of the pole post protrusions 115, so that the pole post 120 protrudes relative to the corresponding pole post protrusions 115. The pole post protrusions 115 and the cover plate body 110 can be fixedly connected by welding, screwing, riveting, etc., or they can be formed by integral stamping, which simplifies the production process, reduces waste, and lowers production costs.

[0080] The pole post 120 passes through the pole post mounting hole 113 and the pole post protrusion ring 115 and is then fixed by the first plastic part 130. The first plastic part 130 is injection molded so that the first plastic part 130 is fixed between the pole post 120 and the pole post protrusion ring 115 and can cover the outer surface of the pole post protrusion ring 115, thereby realizing the fixed connection between the pole post 120, the first plastic part 130 and the cover plate body 110.

[0081] In some implementations, such as Figure 10 and Figure 11 As shown, the end of the pole post protrusion ring 115 away from the first end face 111 of the cover plate body 110 is provided with an annular pressing part 116 extending inward along the circumference of the pole post mounting hole 113.

[0082] Specifically, the upper end of the electrode post protrusion 115 bends and extends into the electrode post mounting hole 113 to form an annular clamping part 116. The annular clamping part 116 has a cavity inside, allowing the electrode post 120 to pass through the annular clamping part 116 and protrude relative to the annular clamping part 116. The annular clamping part 116 and the electrode post protrusion 115 can be welded or integrally formed. The annular clamping part 116 restricts the first plastic part 130 from moving axially along the electrode post 120 during injection molding, making the connection between the first plastic part 130 and the cover plate body 110 more secure.

[0083] In some implementations, such as Figures 12 to 14 As shown, the first plastic part 130 includes an annular top wall 131, and the bottom of the annular top wall 131 is provided with a concentric first annular side wall 132 and a second annular side wall 133.

[0084] The first annular sidewall 132 is sealed to the pole post 120, and an annular assembly groove 134 is formed between the first annular sidewall 132 and the second annular sidewall 133, and the pole post protrusion ring 115 is assembled in the annular assembly groove 134.

[0085] Specifically, the pole post 120 includes a pole post 120 body and a pole post protrusion ring 115 fixedly disposed on the outer side wall of the pole post 120 body in an annular arrangement. The pole post 120 body can be integrally formed or separately disposed, such as including a first pole post 120 and a second pole post 120 fixedly connected. The first pole post 120 is disposed close to the first plastic part 130 relative to the second pole post 120. The diameter of the first pole post 120 is larger than the diameter of the second pole post 120, forming a pole post 120 that is wider at the top and narrower at the bottom, which facilitates the subsequent provision of assembly space for the seal 150 and the welded part 140, etc. The pole post protrusion ring 115 is annularly arranged and can be disposed on the outer side wall of the first pole post 120 or / and the second pole post 120, and disposed on the side side wall of the first pole post 120 and the second pole post 120 that are close to each other.

[0086] The structure of the first injection molded part is related to the structure of the pole post 120 and the structure of the pole post protrusion 115 on the cover plate body 110. For example, the first injection molded part includes an annular top wall 131.

[0087] A first annular sidewall 132 extends circumferentially from the bottom edge of the annular top wall 131, and a second annular sidewall 133 extends circumferentially from the bottom edge of the annular bottom wall. The first annular sidewall 132 and the second annular sidewall 133 are concentrically arranged. The interior of the annular top wall 131 is tightly fitted and sealed to the upper part of the sidewall of the pole post 120, and the annular top wall 131 covers the annular pressing part. The first annular sidewall 132 is tightly fitted and sealed to the lower part of the sidewall of the pole post 120. The inner diameter of the first annular sidewall 132 is larger than the inner diameter of the annular top wall 131 to adapt to the structural design of the annular boss 121 on the pole post 120, so that the pole post 120 is more firmly fixed to the first plastic part 130.

[0088] An annular assembly groove 134 is formed between the first annular sidewall 132 and the second annular sidewall 133. The pole post protrusion 115 on the cover plate body 110 can be assembled in the annular assembly groove 134 along the axial direction of the pole post 120, which can restrict the radial movement of the first plastic part 130 and make the first plastic part 130 and the cover plate body 110 firmly fixed.

[0089] In some implementations, such as Figures 10 to 13 As shown, the pole post protrusion 115 is provided with at least one first anti-rotation groove 1150 that extends through the pole post 120 along the axial direction perpendicular to the pole post 120. A first anti-rotation boss 135 is provided between the first annular sidewall 132 and the second annular sidewall 133. The first anti-rotation boss 135 and the first anti-rotation groove 1150 are inserted into each other along the axial direction perpendicular to the pole post 120.

[0090] Specifically, the pole post protrusion 115 has multiple first anti-rotation grooves 1150 circumferentially formed, and each first anti-rotation groove 1150 penetrates the pole post protrusion 115 along an axial direction perpendicular to the pole post 120. This allows the injection molding material to pass through the first anti-rotation grooves 1150 during the injection molding process to form a first anti-rotation boss 135, achieving rapid injection molding. Furthermore, the cooperation between the first anti-rotation boss 135 and the first anti-rotation grooves 1150 makes the connection between the first plastic part 130 and the cover plate body 110 more secure. For example, the number of first anti-rotation grooves 1150 is 2 to 8, preferably 2 to 4, but other values ​​can also be used.

[0091] In some implementations, such as Figures 12 to 17 As shown, an annular boss 121 is provided on the outer side wall of the pole post 120. At least one second anti-rotation groove 1210 is provided on the annular boss 121. A second anti-rotation boss 136 matching the second anti-rotation groove 1210 is provided on the first annular side wall 132. The second anti-rotation groove 1210 and the second anti-rotation boss 136 are inserted and engaged in a direction perpendicular to the axis of the pole post 120.

[0092] Specifically, an annular boss 121 is fixedly provided on the outer side wall of the electrode post 120 within the electrode post mounting hole 113. This can be achieved through welding, integral molding, or other methods. The annular boss 121 has multiple second anti-rotation grooves 1210 circumferentially formed. These second anti-rotation grooves 1210 extend axially perpendicular to the electrode post 120. The second anti-rotation grooves 1210 allow the first annular side wall 132 to be molded into the second anti-rotation grooves 1210 during the injection molding process of the first plastic part 130, forming a second anti-rotation boss 136. The cooperation between the second anti-rotation boss 136 and the second anti-rotation groove 1210 restricts the circumferential movement of the electrode post 120, further improving the fixation strength between the electrode post 120 and the first plastic part 130. For example, the number of second anti-rotation grooves 1210 is 2 to 8, preferably 2 to 4, but other values ​​can also be used.

[0093] In some embodiments, the first plastic parts 130 corresponding to the positive terminal and the negative terminal are simultaneously injection molded.

[0094] Specifically, the first plastic part 130 is injection molded, which simplifies the processing and makes the connection between the first plastic part 130, the pole post 120 and the cover plate body 110 more secure.

[0095] In some implementations, such as Figures 1 to 5 , Figures 18 to 20 As shown, a second plastic part 160 is also provided on the side of the cover plate body 110 near the second end face 112, and the second plastic part 160 covers the second end face 112.

[0096] The second plastic part 160 has a through hole 161 that passes through the pole 120 along the axial direction at the position corresponding to the pole mounting hole 113. The pole 120 passes through the through hole 161 and protrudes from the end face of the second plastic part 160 away from the welded part 140. The protrusion height of the pole 120 relative to the second plastic part 160 is 0.1mm~0.5mm.

[0097] Specifically, a second plastic part 160 is covered at the second end face 112 of the cover plate body 110. The material of the second plastic part 160 may be the same as or different from that of the first plastic part 130. The second plastic part 160 has a through hole 161 at a position corresponding to the electrode mounting hole 113. The size of the through hole 161 matches the size of the lower end face of the electrode 120, so that the electrode 120 can pass through the through hole 161 and partially protrude from the lower end face of the second plastic part 160. This makes the lower end face of the electrode 120 protrude relative to the lower end face of the second plastic part 160, which facilitates the welding of the electrode 120 to the connecting piece inside the cell, such as welding the positive electrode to the positive connecting piece and the negative electrode to the negative connecting piece, increasing the welding area and improving the current carrying capacity. The protrusion height of the lower end face of the terminal post 120 relative to the lower end face of the second plastic part 160 is 0.1mm~0.5mm. If the protrusion height is less than 0.1mm, it is not conducive to welding the terminal post 120 to the corresponding connecting piece. If the protrusion height is greater than 0.5mm, it is not conducive to the overall assembly of the battery.

[0098] In some implementations, such as Figures 18 to 20 As shown, the second plastic part 160 is provided with a second annular protrusion 162 at the through hole 161, and the second annular protrusion 162 is pressed and engaged with the sealing member 150 along the axial direction of the pole post 120.

[0099] Specifically, the second annular protrusion 162 extends along the axial direction of the pole post 120 from the side of the second plastic part 160 near the welded part 140 to the side near the first plastic part 130. The second annular protrusion 162 is pressed and fitted with the lower end face of the seal 150, which can further compress the seal 150 and enhance the sealing performance inside and outside the battery cover assembly 100.

[0100] In some implementations, such as Figures 18 to 20 As shown, the second plastic part 160 is provided with a second annular recess 163 on the side near the welded part 140, and the second annular recess 163 forms a second annular protrusion 162 on the side near the pole post 120.

[0101] Specifically, a second annular recess 163 is provided on the side end face of the second plastic part 160 near the welded part 140 and the side near the pole post 120, which can effectively avoid the weld mark protrusion when the welded part 140 is welded to the cover plate body 110, so that the lower end face of the second plastic part 160 remains flat.

[0102] In some implementations, such as Figures 18 to 20As shown, the second plastic part 160 is provided with a second chamfer 164 at the second annular protrusion 162. The second chamfer 164 is inclined from the end face of the second annular protrusion 162 near the seal 150 to the side near the through hole 161.

[0103] Specifically, the second chamfer 164 is provided at the second annular protrusion 162 and is inclined from the inside to the outside along the axial direction of the pole post 120. The setting of the second chamfer 164 facilitates the assembly of the lower end face of the pole post 120.

[0104] It is understandable that, such as Figure 1 and Figure 5 As shown, the cover plate body 110 is also provided with conventional components such as an injection hole 117, an explosion-proof valve 118, and a protective plate 119 provided on the explosion-proof valve 118.

[0105] A second aspect of this utility model provides a battery, characterized in that the battery includes the battery cover assembly 100 described in any embodiment of this application.

[0106] The battery provided in this application embodiment also includes a casing, electrodes, and electrolyte located within the casing. The casing is sealed to the battery cover assembly 100. The specific technical features and effects of the battery are consistent with those of the battery cover assembly 100, and will not be repeated in this application embodiment. The battery may be a lithium-ion battery, etc.

[0107] A third aspect of this utility model is to provide an electrical device, which includes the battery described in any embodiment of this application.

[0108] Specifically, the technical features and effects of the electrical equipment are consistent with those of the battery cover assembly 100, and will not be repeated in the embodiments of this application.

[0109] It should be noted that electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This utility model embodiment does not impose any special limitations on the above-mentioned electrical equipment.

[0110] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A battery cover plate assembly (100) characterized by, It includes: cover plate body (110), pole (120), first plastic part (130), sealing element (150) and welding element (140), wherein, The cover plate body (110) has a first end face (111) and a second end face (112) arranged oppositely, and the cover plate body (110) has a pole mounting hole (113) penetrating through the first end face (111) and the second end face (112); The pole (120) is assembled into the pole mounting hole (113) from the first end face (111) side of the cover plate body (110), and is arranged protruding relative to the first end face (111); The side wall of the pole (120) is injection molded with the first plastic part (130), and the first plastic part (130) is arranged at the first end face (111) of the cover plate body (110); The cover plate body (110) is provided with a welding groove (114) communicated with the pole mounting hole (113) near the second end face (112), the welding element (140) is arranged in the form of a ring and is assembled in the welding groove (114), and the first annular protruding part (141) is arranged on the side of the welding element (140) close to the pole (120); The sealing element (150) is arranged in the form of a ring and is provided with a first annular recess (153), the sealing element (150) is assembled between the pole (120) and the welding element (140), and the first annular protruding part (141) and the first annular recess (153) are concave-convex matched along the axial direction of the pole (120).

2. The battery cover plate assembly (100) of claim 1, wherein, The welding element (140) is further provided with an annular groove (142), and the first annular protruding part (141) is closer to the pole (120) relative to the annular groove (142).

3. The battery cover plate assembly (100) of claim 1, wherein, The edge of the first annular protruding part (141) is provided with a first chamfer (143), and the first chamfer (143) is arranged obliquely from the side end face of the welding element (140) away from the first plastic part (130) to the side close to the pole mounting hole (113).

4. The battery cover plate assembly (100) of claim 1, wherein, The cover plate body (110) is provided with a pole convex ring (115) protruding from the first end face (111) at the pole mounting hole (113), the pole (120) passes through the pole mounting hole (113) and the pole convex ring (115) in sequence, and is arranged protruding relative to the pole convex ring (115); The first plastic part (130) is partially arranged between the pole (120) and the pole convex ring (115), and the first plastic part (130) is partially wrapped on the outer surface of the pole convex ring (115).

5. The battery cover plate assembly (100) of claim 4, wherein, The pole convex ring (115) is provided with an annular compression part (116) extending inward along the circumferential direction of the pole mounting hole (113) at the side end of the pole convex ring (115) away from the first end face (111) of the cover plate body (110).

6. The battery cover plate assembly (100) of claim 4, wherein, The first plastic part (130) comprises a ring-shaped top wall (131), and the bottom of the ring-shaped top wall (131) is provided with concentric first and second ring-shaped side walls (132, 133); The first ring-shaped side wall (132) is in sealing fit with the pole column (120), and the first and second ring-shaped side walls (132, 133) form a ring-shaped assembly groove (134) therebetween, and the pole column convex ring (115) is assembled in the ring-shaped assembly groove (134).

7. The battery cover plate assembly (100) of claim 6, wherein, The pole column convex ring (115) is provided with at least one first anti-rotation groove (1150) penetrating through in the axial direction perpendicular to the pole column (120), and the first and second ring-shaped side walls (132, 133) are provided with a first anti-rotation convex platform (135), which is in plug fit with the first anti-rotation groove (1150) in the axial direction perpendicular to the pole column (120).

8. The battery cover plate assembly (100) of claim 6, wherein, The side wall of the pole column (120) is provided with a ring-shaped convex platform (121), and the ring-shaped convex platform (121) is provided with at least one second anti-rotation groove (1210), and the first ring-shaped side wall (132) is provided with a second anti-rotation convex platform (136) matched with the second anti-rotation groove (1210), and the second anti-rotation groove (1210) is in plug fit with the second anti-rotation convex platform (136) in the axial direction perpendicular to the pole column (120).

9. The battery cover plate assembly (100) according to any one of claims 1-8, characterized in that, The cover plate body (110) is further provided with a second plastic part (160) on the side close to the second end surface (112), and the second plastic part (160) covers the second end surface (112). The second plastic part (160) is provided with a through hole (161) penetrating through in the axial direction of the pole column (120) at the position corresponding to the pole column mounting hole (113), the pole column (120) passes through the through hole (161) and protrudes relative to the side end surface of the second plastic part (160) away from the welding part (140), and the protruding height of the pole column (120) relative to the second plastic part (160) is 0.1mm-0.5mm.

10. The battery cover plate assembly (100) of claim 9, wherein, The second plastic part (160) is provided with a second ring-shaped protruding part (162) at the through hole (161), and the second ring-shaped protruding part (162) is in compression fit with the sealing part (150) in the axial direction of the pole column (120).

11. The battery cover plate assembly (100) of claim 10, wherein, The second plastic part (160) is provided with a second ring-shaped recessed part (163) on the side close to the welding part (140), and the second ring-shaped recessed part (163) forms the second ring-shaped protruding part (162) on the side close to the pole column (120).

12. The battery cover plate assembly (100) of claim 10, wherein, The second plastic part (160) is provided with a second chamfer (164) at the second ring-shaped protruding part (162), and the second chamfer (164) is inclined from the side end surface of the second ring-shaped protruding part (162) close to the sealing part (150) to the side close to the through hole (161).

13. A battery, characterized by The battery comprises the battery cover plate assembly (100) of any one of claims 1-12.

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