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 and a first plastic part, the cover plate main body is provided with a first end face and a second end face which are oppositely arranged, a pole mounting hole is formed in the cover plate main body, a pole convex ring protruding out of the first end face is arranged at the pole mounting hole, and the pole sequentially penetrates through the pole mounting hole and the pole convex ring and protrudes out relative to the pole convex ring; an annular pressing part extending along the pole mounting hole is arranged at the end part of one side, far away from the cover plate main body, of the pole convex ring, and a first anti-rotation groove is circumferentially formed in one side, close to the pole, of the annular pressing part; the first plastic part is partially arranged between the pole and the pole convex ring and partially wraps the outer surface of the pole convex ring, a first anti-rotation boss matched with the first anti-rotation groove is formed on the first plastic part in an injection molding mode, and the first anti-rotation boss and the first anti-rotation groove are in insertion fit in the axial direction perpendicular to the pole. The battery cover plate assembly can prevent the pole from rotating circumferentially and improve the anti-torsion strength of the pole.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a battery cover plate subassembly and battery. BACKGROUND

[0002] The current battery structure, general battery cover plate subassembly usually includes top cover piece, positive pole, negative pole, upper plastic, sealing ring etc., wherein, positive pole and negative pole generally adopt round pole structure, and the top cover piece is not provided with the limiting structure in the circumferential direction, and only relies on the compression of the sealing ring to limit the rotation of the pole, and the torsion is small, and the demand of high torsion intensity requirement cannot be met, and the circumferential rotation limiting force of the pole is small. CONTENT OF UTILITY MODEL

[0003] In view of the above-mentioned defects or insufficient in the prior art, it is expected to provide a battery cover plate subassembly and battery.

[0004] The utility model discloses a first aspect provides a kind of battery cover plate subassembly, comprising: cover plate main body, pole and first plastic piece, wherein,

[0005] The cover plate main body has oppositely arranged first end face and second end face, and the cover plate main body has a pole mounting hole penetrating the first end face and the second end face;

[0006] The cover plate main body is provided with a pole convex ring protruding from the first end face at the pole mounting hole, the pole passes through the pole convex ring and the pole mounting hole in sequence from the first end face side of the cover plate main body, and the pole is set on the first end face side of the cover plate main body relative to the pole convex ring;

[0007] The pole convex ring is provided with an annular compression part extending inward along the circumferential direction in the pole mounting hole at the end of the first end face side of the cover plate main body, and at least one first anti-rotation groove is provided on the side of the annular compression part close to the pole in the circumferential direction;

[0008] The first plastic piece is partially arranged between the pole and the corresponding pole convex ring, and the first plastic piece is wrapped on the outer surface of the corresponding pole convex ring, a first anti-rotation boss matched with the first anti-rotation groove is formed on the first plastic piece by injection molding, and the first anti-rotation boss and the first anti-rotation groove are inserted and matched in the axial direction perpendicular to the pole.

[0009] The battery cover plate subassembly provided by the utility model has a simple structure, and the first anti-rotation boss on the first plastic piece and the first anti-rotation groove arranged on the pole convex ring of the cover plate main body are inserted and matched in the axial direction of the pole, which can effectively improve the anti-rotation strength of the pole, prevent the pole from rotating in the circumferential direction on the cover plate main body, and improve the torsional strength of the pole.

[0010] In addition, the battery cover plate assembly can further have the following additional technical features.

[0011] Preferably, the cover plate body is provided with an annular support portion extending into the pole mounting hole near the second end face, and a first annular protruding portion is arranged on the side of the annular support portion close to the pole.

[0012] The battery cover plate assembly further comprises a sealing member arranged in an annular shape and provided with a first annular recess portion, the sealing member is fitted between the pole and the annular support portion, and the first annular protruding portion and the first annular recess portion are concave-convex matched along the axial direction of the pole.

[0013] Preferably, the annular support portion is provided with an annular groove on the side close to the first plastic member, and the first annular protruding portion is closer to the pole relative to the annular groove.

[0014] Preferably, the annular support portion is provided with a first chamfer at the first annular protruding portion, and the first chamfer is arranged obliquely from the side end face of the annular support portion away from the first plastic member to the side close to the inner side of the pole mounting hole.

[0015] Preferably, the first plastic member comprises an annular top wall, the annular top wall is in sealing cooperation with the side wall of the pole and is covered outside the annular compression portion.

[0016] An annular side wall extends outward from the edge of the annular top wall, and the annular side wall is covered outside the convex ring of the pole.

[0017] The edge inner periphery of the annular top wall extends along the axial direction perpendicular to the pole to form the first anti-rotation boss.

[0018] Preferably, the side wall of the pole is provided with an annular boss outside, at least one second anti-rotation groove is arranged on the annular boss in the circumferential direction, and the second anti-rotation groove is arranged correspondingly along the axial direction of the pole with the first anti-rotation groove.

[0019] A second anti-rotation boss is formed in the bottom of the annular top wall along the axial direction of the pole, the second anti-rotation boss is fixedly connected with the first anti-rotation boss, and the second anti-rotation boss is inserted and matched with the second anti-rotation groove along the axial direction of the pole.

[0020] Preferably, the battery cover plate assembly further comprises an insulating support part, the insulating support part comprises a first annular cylinder, the bottom end of the first annular cylinder is fixedly connected with a second annular cylinder, the first annular cylinder is arranged between the side wall of the pole and the first plastic part, and the top end of the first annular cylinder is flush with the annular compression part, and the bottom end of the first annular cylinder is in compression fit with the upper end surface of the annular boss.

[0021] The second annular cylinder is arranged between the first plastic part and the pole convex ring, the top end of the second annular cylinder is in compression fit with the annular compression part, and the bottom end of the second annular cylinder is in compression fit with the annular support part.

[0022] Preferably, a through hole is formed in the second annular cylinder at a position corresponding to the second anti-rotation groove, the through hole is in communication with the second anti-rotation groove, and the second anti-rotation boss passes through the through hole and the second anti-rotation groove in sequence.

[0023] Preferably, the first plastic parts corresponding to the positive pole and the negative pole are formed by injection molding.

[0024] Preferably, the side of the cover plate body close to the second end surface is further provided with a second plastic part, and the second plastic part covers the second end surface.

[0025] The second plastic part is provided with a through hole penetrating in the axial direction of the pole at a position corresponding to the pole mounting hole, the pole passes through the through hole and protrudes away from the end surface of the second plastic part away from the annular support part, and the protrusion height of the pole relative to the second plastic part is 0.1mm-0.5mm.

[0026] Preferably, the second plastic part is provided with a second annular protruding part at the through hole, and the second annular protruding part is in compression fit with the sealing part in the axial direction of the pole.

[0027] Preferably, the second plastic part is provided with a second annular recessed part close to the annular support part, and the second annular recessed part close to the side of the pole forms the second annular protruding part.

[0028] Preferably, the second plastic part is provided with a second chamfer at the second annular protruding part, and the second chamfer is arranged obliquely from the end surface of the second annular protruding part close to the sealing part to the side close to the through hole.

[0029] The second aspect of the utility model provides a kind of battery, characterized in that, the battery includes the battery cover plate assembly described in any embodiment of the application.

[0030] The utility model discloses a third aspect, provide a kind of electric equipment, the electric equipment includes the battery described in any embodiment of the present application.

[0031] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0032] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the attached drawings:

[0033] Figure 1 The battery cover plate assembly provided for the embodiment of the present application is a three-dimensional structure diagram;

[0034] Figure 2 The battery cover plate assembly provided for the embodiment of the present application is an exploded view;

[0035] Figure 3 The battery cover plate assembly provided for the embodiment of the present application is a top view;

[0036] Figure 4 The battery cover plate assembly provided for the embodiment of the present application is a bottom view;

[0037] Figure 5 The battery cover plate assembly provided for the embodiment of the present application is a sectional view;

[0038] Figure 6 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown); Figure 5 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0039] Figure 7 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0040] Figure 8 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0041] Figure 9 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0042] Figure 10 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0043] Figure 11 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown); Figure 10 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0044] Figure 12 The battery cover plate assembly provided for the embodiment of the present application is a sectional view (the first plastic part is not shown);

[0045] Figure 13A perspective view of the first plastic part according to an embodiment of the present application is provided.

[0046] Figure 14 A sectional view of the first plastic part according to an embodiment of the present application is provided.

[0047] Figure 15 A perspective view of the pole according to an embodiment of the present application is provided.

[0048] Figure 16 A top view of the pole according to an embodiment of the present application is provided.

[0049] Figure 17 A sectional view of the pole according to an embodiment of the present application is provided.

[0050] Figure 18 A perspective view of the insulating support according to an embodiment of the present application is provided.

[0051] Figure 19 A top view of the insulating support according to an embodiment of the present application is provided.

[0052] Figure 20 A sectional view of the insulating support according to an embodiment of the present application is provided.

[0053] Figure 21 A partial perspective view of the second plastic part according to an embodiment of the present application is provided.

[0054] Figure 22 A sectional view of the second plastic part according to an embodiment of the present application is provided.

[0055] Figure 23 A Figure 22 A partial enlarged view of the middle C.

[0056] In the above figures:

[0057] 100 battery cover plate assembly

[0058] 110 cover plate body; 111 first end face; 112 second end face; 113 pole mounting hole; 115 pole convex ring; 116 annular compression part; 1160 first anti-rotation groove; 117 liquid injection hole; 118 explosion-proof valve; 119 protective sheet

[0059] 120 pole; 121 annular boss; 1210 second anti-rotation groove

[0060] 130 first plastic part; 131 annular top wall; 132 annular side wall; 133 first anti-rotation boss; 134 second anti-rotation boss

[0061] 140 annular support; 141 first annular protruding part; 142 annular groove; 143 first chamfer

[0062] 150 seal; 151 first annular seal portion; 152 second annular seal portion; 153 first annular recess;

[0063] 160 second plastic member; 161 through hole; 162 second annular protrusion; 163 second annular recess; 164 second chamfer;

[0064] 170 insulating support portion; 171 first annular cylinder; 172 second annular cylinder; 1721 through hole. DETAILED DESCRIPTION

[0065] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that only parts related to the utility model are shown in the drawings for ease of description.

[0066] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0067] The terms used in the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present 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" used herein means and includes any or all possible combinations of one or more associated listed items.

[0068] Unless otherwise required by the context, the term "comprising" is interpreted to mean "including, but not limited to" throughout the specification and claims.

[0069] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to mean that the specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The illustrative representation of the above terms does not necessarily mean the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0070] The terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0071] As Figures 1 to 20 The utility model discloses a battery cover plate assembly 100, comprising: cover plate main body 110, pole 120 and first plastic piece 130, wherein,

[0072] The cover plate main body 110 has oppositely arranged first end face 111 and second end face 112, and the cover plate main body 110 has two pole mounting holes 113 penetrating the first end face 111 and the second end face 112;

[0073] The cover plate main 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 sequentially passes through the pole convex ring 115 and the pole mounting hole 113 from the first end face 111 side of the cover plate main body 110, and the pole 120 is arranged on the side of the first end face 111 of the cover plate main body 110 relative to the pole convex ring 115;

[0074] The pole convex ring 115 is provided with an annular compression part 116 extending inward along the circumference of the pole mounting hole 113 at the side end of the first end face 111 of the cover plate main body 110, and at least one first anti-rotation groove 1160 (see Figures 7-11 ) is arranged on the side of the pole 120 close to the annular compression part 116 in the circumferential direction;

[0075] The first plastic piece 130 is partially arranged between the pole 120 and the corresponding pole convex ring 115, and the first plastic piece 130 partially covers the outer surface of the corresponding pole convex ring 115, the first plastic piece 130 is formed by injection molding to match the first anti-rotation groove 1160, and the first anti-rotation groove 1160 and the first anti-rotation groove 1160 are inserted and matched in the axial direction perpendicular to the pole 120.

[0076] As Figures 1 to 10As shown, the cover plate body 110 is in a square sheet structure, and has a first end face 111 and a second end face 112 oppositely arranged along the thickness direction of the cover plate body 110. The cover plate body 110 has two pole mounting holes 113, each of which penetrates the first end face 111 and the second end face 112, and the structures arranged at each pole mounting hole 113 are the same. The cover plate body 110 is provided with a pole protruding ring 115 at each pole mounting hole 113, which extends from the first end face 111 of the cover plate body 110 to away from the first end face 111 along the axial direction of the pole 120, and the pole 120 penetrates the pole mounting hole 113 and the pole protruding ring 115 and partially protrudes out of the pole protruding ring 115, so that the pole 120 is protrudingly arranged relative to the corresponding pole protruding ring 115. The pole protruding ring 115 and the cover plate body 110 can be fixedly connected by welding, screwing, riveting, etc., or can be formed by one-piece stamping, which simplifies the production process, reduces waste generation, and reduces production cost.

[0077] As shown in the drawings, Figures 5 to 7 The pole 120 includes a positive pole and a negative pole. The pole 120 is fixed by a first plastic part 130 after penetrating the pole mounting hole 113 and the pole protruding ring 115. The first plastic part 130 is injection molded, so that the first plastic part 130 is partially fixed between the pole 120 and the pole protruding ring 115, and partially covers the outer surface of the pole protruding ring 115, realizing the fixed connection between the pole 120, the first plastic part 130 and the cover plate body 110. The positive pole is assembled into one pole mounting hole 113 and the corresponding pole protruding ring 115 and partially protrudes out of the first end face 111 to be protrudingly arranged relative to the pole protruding ring 115, and a first plastic part 130 is fixedly sleeved outside the side wall of the positive pole near the first end face 111. The negative pole is assembled into the other pole mounting hole 113 and partially protrudes out of the first end face 111 to be protrudingly arranged relative to the pole protruding ring 115, and the other first plastic part 130 is fixedly sleeved outside the side wall of the negative pole near the first end face 111, and each first plastic part 130 is fixed on the first end face 111 of the cover plate body 110, and the first plastic part 130 covers the annular compression part 116 and the pole protruding ring 115.

[0078] As shown in the drawings, Figures 5 to 10 The upper end of the pole protruding ring 115 is bent and extended into the pole mounting hole 113 to form an annular compression part 116, and the annular compression part 116 has a cavity inside, so that the pole 120 can penetrate the annular compression part 116 and be protrudingly arranged relative to the annular compression part 116. The annular compression part 116 and the pole protruding ring 115 can be welded or integrally formed.

[0079] As shown in the drawings, Figures 8 to 10As shown, the annular pressing part 116 is provided with a plurality of first anti-rotation grooves 1160 on one side close to the pole column 120, and the number of the first anti-rotation grooves 1160 is 2-8, preferably 2-4, and other values can also be used. The first anti-rotation grooves 1160 are arranged along the axial direction perpendicular to the pole column 120. The first plastic part 130 is provided with a plurality of first anti-rotation bosses 133, and the number of the first anti-rotation bosses 133 is the same as that of the first anti-rotation grooves 1160. The first anti-rotation bosses 133 and the first anti-rotation grooves 1160 are inserted and matched along the axial direction of the pole column 120, so as to limit the circumferential rotation movement of the pole column 120. Among them, the plurality of first anti-rotation grooves 1160 are uniformly distributed on the annular pressing part 116, which further improves the anti-rotation strength of the pole column 120.

[0080] The battery cover plate assembly 100 has a simple structure, and the first anti-rotation bosses 133 on the first plastic part 130 and the first anti-rotation grooves 1160 provided on the pole column convex ring 115 of the cover plate body 110 are inserted and matched along the axial direction of the pole column 120, so as to effectively improve the anti-rotation strength of the pole column 120, prevent the pole column 120 from rotating along the circumferential direction on the cover plate body 110, and improve the torsional strength of the pole column 120.

[0081] In some embodiments, as Figures 5 to 12 As shown, the cover plate body 110 is provided with an annular support part 140 extending into the pole column mounting hole 113 close to the second end face 112, and the annular support part 140 is provided with a first annular protruding part 141 on one side close to the pole column 120. In the thickness direction of the cover plate body 110, the first annular protruding part 141 has a contact surface farther away from the second end face 112 than the annular support part 140.

[0082] The battery cover plate assembly 100 further comprises a sealing member 150, which is annularly arranged and provided with a first annular recessed part 153. The sealing member 150 is assembled between the pole column 120 and the annular support part 140, and the first annular protruding part 141 and the first annular recessed part 153 are concave-convex matched along the axial direction of the pole column 120.

[0083] Specifically, the cover plate body 110 is provided with an annular support portion 140 close to the second end face 112, the annular support portion 140 is integrally formed with the cover plate body 110, the annular support portion 140 has an annular cavity inside, which is convenient for mounting the pole 120 and the sealing element 150 and the like. The first annular protruding portion 141 is fixedly arranged on one side of the annular support portion 140 close to the pole 120, the first annular protruding portion 141 extends along the axial direction of the pole 120 and protrudes relative to the second end face, so that the first annular protruding portion 141 has a contact surface farther away from the second end face 112 relative to the annular support portion 140, and the contact surface can be sealingly matched with the first annular recessed portion 153 of the sealing element 150. The first annular protruding portion 141 is fixedly connected with the annular support portion 140 in a manner of integral molding or the like, and the first annular protruding portion 141 extends from the end face of the annular support portion 140 to the side close to the first plastic element 130 along the axial direction of the pole 120.

[0084] As shown in Figure 12 , the sealing element 150 is made of elastic material such as rubber, and the bottom of the sealing element 150 is concentrically provided with a first annular sealing portion 151 and a second annular sealing portion 152, and a first annular recessed portion 153 is formed between the first annular sealing portion 151 and the second annular sealing portion 152. Among them, the first annular sealing portion 151 is arranged between the side wall of the pole 120 and the annular support portion 140, the first annular protruding portion 141 of the annular support portion 140 is sealingly matched in the first annular recessed portion 153 and the two are concave-convex matched along the axial direction of the pole 120, and the structure design of the sealing element 150 enhances the sealing performance of the annular support portion 140 and the pole 120, and the sealing element 150 is firm and stable.

[0085] It should be noted that along the axial direction of the pole 120, the height of the first annular sealing portion 151 is greater than the height of the second annular sealing portion 152, so that the lower end face of the first annular sealing portion 151 and the lower end face of the annular support portion 140 can be arranged flush, wherein the lower end face refers to the end face away from the first plastic element 130.

[0086] In some embodiments, as shown in Figures 5 to 11 , the annular support portion 140 is provided with an annular groove 142 close to the first plastic element 130; wherein the first annular protruding portion 141 is closer to the pole 120 relative to the annular groove 142.

[0087] Specifically, the annular support portion 140 is provided with an annular groove 142 close to the side end face of the first plastic part 130 and close to the side of the pole column 120. The annular groove 142 forms a first annular protrusion 141 close to the side of the pole column 120. The annular groove 142 provides a mounting space for the sealing element 150. After the sealing element 150 is assembled, the side of the annular support portion 140 away from the first plastic part 130 is flush with the first plastic part 130, which facilitates the assembly of the second plastic part 160.

[0088] In some embodiments, as shown in Figures 5 to 11 The annular support portion 140 is provided with a first chamfer 143 at the first annular protrusion 141. The first chamfer 143 is inclined from the side end face of the annular support portion 140 away from the first plastic part 130 to the side inside the pole column mounting hole 113. In this example, the first chamfer 143 facilitates the installation of the second plastic part 160.

[0089] In some embodiments, as shown in Figure 2 、 Figure 13 and Figure 14 The first plastic part 130 includes an annular top wall 131. The annular top wall 131 is in sealing engagement with the side wall of the pole column 120 and covers the annular compression portion 116.

[0090] An annular side wall 132 extends outward from the edge of the annular top wall 131. The annular side wall 132 covers the pole column protruding ring 115.

[0091] The edge of the annular top wall 131 extends inward along the axis perpendicular to the pole column 120 to form the first anti-rotation boss 133.

[0092] Specifically, the structure of the first injection molded part is related to the structure of the pole column 120 and the structure of the pole column protruding ring 115 on the cover plate body 110. The first plastic part 130 is injection molded after the pole column 120 is assembled to form the annular top wall 131, the annular bottom wall, and the first anti-rotation boss 133. The inside of the annular top wall 131 is in sealing engagement with the side wall of the pole column 120. The annular top wall 131 covers the annular compression portion 116, and the annular side wall 132 covers the pole column protruding ring 115. The injection material of the first plastic part 130 can pass through the first anti-rotation groove 1160 on the annular compression portion 116 to form the first anti-rotation boss 133. Through the cooperation of the first anti-rotation boss 133 and the first anti-rotation groove 1160, the circumferential rotation of the pole column 120 can be limited.

[0093] In some embodiments, as shown in Figures 13 to 17As shown, the side wall of the pole column 120 is provided with an annular boss 121, and at least one second anti-rotation groove 1210 is arranged on the annular boss 121 in the circumferential direction, and the second anti-rotation groove 1210 is arranged in the axial direction of the pole column 120 corresponding to the first anti-rotation groove 1160;

[0094] The bottom of the annular top wall 131 is formed with a second anti-rotation boss 134 extending in the axial direction of the pole column 120, the second anti-rotation boss 134 is fixedly connected with the first anti-rotation boss 133, and the second anti-rotation boss 134 is inserted and matched with the second anti-rotation groove 1210 in the axial direction of the pole column 120.

[0095] Specifically, the pole column 120 includes a pole column 120 body and an annular boss 121 fixedly arranged on the side wall of the pole column 120 body in an annular manner, wherein the pole column 120 body can be integrally formed or can be divided into two parts, such as a first pole column 120 and a second pole column 120 fixedly connected, the first pole column 120 is arranged close to the first plastic part 130 relative to the second pole column 120, the diameter of the first pole column 120 is larger than that of the second pole column 120, forming a pole column 120 with a wide upper part and a narrow lower part, which is convenient for reserving assembly space for the sealing element 150 and the annular support part 140, etc. in the subsequent process, the annular boss 121 is arranged in an annular manner, and the annular boss 121 can be arranged on the side wall of the first pole column 120 or / and the second pole column 120, and on the side wall of the first pole column 120 and the second pole column 120 close to each other.

[0096] A plurality of second anti-rotation grooves 1210 are arranged on the annular boss 121 in the circumferential direction, the second anti-rotation grooves 1210 penetrate the annular boss 121 in the axial direction of the pole column 120, the number of the second anti-rotation grooves 1210 is the same as that of the first anti-rotation grooves 1160 arranged in the axial direction of the pole column 120, so that the injection material of the first plastic part 130 can flow into the second anti-rotation grooves 1210 through the first anti-rotation grooves 1160 to form the second anti-rotation boss 134, and the second anti-rotation boss 134 is inserted and matched with the second anti-rotation groove 1210 in the axial direction of the pole column 120, further limiting the circumferential rotation of the pole column 120, and improving the torsional strength of the pole column 120.

[0097] In some embodiments, as Figures 5 to 7 , Figures 18 to 20 , the battery cover plate assembly 100 further includes an insulating support part 170, the insulating support part 170 includes a first annular cylinder 171, a second annular cylinder 172 is fixedly connected to the bottom end of the first annular cylinder 171, the first annular cylinder 171 is arranged between the side wall of the pole column 120 and the first plastic part 130, the top end of the first annular cylinder 171 is arranged flush with the annular compression part 116, and the bottom end of the first annular cylinder 171 is in compression fit with the upper end surface of the annular boss 121.

[0098] The second annular cylinder 172 is arranged between the first plastic part 130 and the pole post convex ring 115, the top end of the second annular cylinder 172 is in compression fit with the annular compression part 116, and the bottom end of the second annular cylinder 172 is in compression fit with the annular support part 140.

[0099] Specifically, the first annular cylinder 171 and the second annular cylinder 172 are integrally formed, the diameter of the first annular cylinder 171 is smaller than that of the second annular cylinder 172, the first annular cylinder 171 is arranged between the side wall upper end of the pole post 120 and the side of the first plastic part 130 close to the pole post 120, and the top end of the first annular cylinder 171 is flush with the annular compression part 116, and the bottom end of the first annular cylinder 171 is in compression fit with the upper end surface of the annular boss 121. The second annular cylinder 172 is arranged between the side of the first plastic part 130 close to the pole post 120 and the annular boss 121, the upper end of the second annular cylinder 172 is in compression fit with the bottom end of the annular compression part 116, and the bottom end of the second annular cylinder 172 is in compression fit with the support convex of the annular support part 140, which is formed by the side of the annular groove 142 close to the pole post convex ring 115.

[0100] In this example, through the stepped annular support part 140, the connection of the pole post 120 with the pole post convex ring 115 on the cover plate main body 110 and the first plastic part 130 is more firm.

[0101] In some embodiments, as shown in FIG. 1, the first plastic part 130 is arranged between the pole post 120 and the cover plate main body 110, and the first plastic part 130 is in compression fit with the annular compression part 116 of the cover plate main body 110. Figure 7 、 Figures 18 to 20 The second annular cylinder 172 is arranged between the first plastic part 130 and the pole post convex ring 115, the top end of the second annular cylinder 172 is in compression fit with the annular compression part 116, and the bottom end of the second annular cylinder 172 is in compression fit with the annular support part 140.

[0102] Specifically, the through hole 1721 penetrates the second annular cylinder 172 along the axial direction of the pole post 120, and along the axial direction of the pole post 120, the through hole 1721 is in correspondence with and in communication with the second anti-rotation groove 1210, so that the injection material of the first plastic part 130 can flow through the first anti-rotation groove 1160, flow through the through hole 1721, and then flow to the second anti-rotation groove 1210 to form the second anti-rotation convex 134. The second anti-rotation convex 134 further limits the circumferential rotation movement of the pole post 120 by cooperating with the through hole 1721 and the second anti-rotation groove 1210.

[0103] In some embodiments, the first plastic part 130 corresponding to the positive pole post and the negative pole post is injection molded.

[0104] Specifically, the first plastic part 130 is arranged by injection molding, the processing technology is simple, and the connection between the first plastic part 130, the pole column 120 and the cover plate body 110 is more firm.

[0105] In some embodiments, as shown in Figures 1 to 7 、 Figures 21 to 23 The cover plate body 110 is further provided with a second plastic part 160 on one side close to the second end surface 112, and the second plastic part 160 covers the second end surface 112.

[0106] The second plastic part 160 is provided with a through hole 161 penetrating along the axial direction of the pole column 120 at a position corresponding to the pole column mounting hole 113, the pole column 120 penetrates through the through hole 161 and is protrudingly arranged relative to the second end surface of the second plastic part 160 away from the annular support part 140, and the protruding height of the pole column 120 relative to the second plastic part 160 is 0.1mm-0.5mm.

[0107] Specifically, the second end surface 112 of the cover plate body 110 is covered with the second plastic part 160, and the material of the second plastic part 160 is the same as or different from that of the first plastic part 130. The second plastic part 160 is provided with a through hole 161 at a position corresponding to the pole column mounting hole 113, and the size of the through hole 161 is matched with that of the lower end surface of the pole column 120, so that the pole column 120 can penetrate through the through hole 161 and partially protrude from the lower end surface of the second plastic part 160, so that the lower end surface of the pole column 120 is protrudingly arranged relative to the lower end surface of the second plastic part 160, facilitating the welding of the pole column 120 and the connecting piece inside the battery cell, such as the welding of the positive pole column and the positive connecting piece and the welding of the negative pole column and the negative connecting piece, increasing the welding area and improving the current overcurrent capacity. The protruding height of the lower end surface of the pole column 120 relative to the lower end surface of the second plastic part 160 is 0.1mm-0.5mm, the protruding height less than 0.1mm is not conducive to the welding of the pole column 120 and the corresponding connecting piece, and the protruding height greater than 0.5mm is not conducive to the assembly of the whole battery.

[0108] In some embodiments, the second plastic part 160 is provided with a second annular protruding part 162 at the through hole 161, and the second annular protruding part 162 is tightly matched with the sealing part 150 along the axial direction of the pole column 120.

[0109] Specifically, the second annular protruding part 162 is arranged to extend from the one side end surface of the second plastic part 160 close to the annular support part 140 to the one side close to the first plastic part 130 along the axial direction of the pole column 120, the second annular protruding part 162 is tightly matched with the lower end surface of the sealing part 150, and the sealing part 150 can be further compressed, thereby strengthening the sealing between the inside and outside of the battery cover plate assembly 100.

[0110] In some embodiments, the second plastic part 160 is provided with a second annular recess 163 near one side of the annular support part 140, and the second annular recess 163 is formed near one side of the pole column 120 to form the second annular protrusion 162.

[0111] Specifically, the second plastic part 160 is provided with a second annular recess 163 near one side end surface of the annular support part 140 and near one side of the pole column 120, which can effectively avoid the welding mark protrusion when the annular support part 140 is welded with the cover plate body 110, and keep the lower end surface of the second plastic part 160 flat.

[0112] In some embodiments, the second plastic part 160 is provided with a second chamfer 164 at the second annular protrusion 162, and the second chamfer 164 is inclined from one side end surface of the second annular protrusion 162 near the sealing part 150 to one side inside the through hole 161.

[0113] Specifically, the second chamfer 164 is provided at the second annular protrusion 162 and is inclined from inside to outside along the axial direction of the pole column 120, and the provision of the second chamfer 164 facilitates the assembly of the lower end surface of the pole column 120.

[0114] It can be understood that, as shown in the drawings, the cover plate body 110 is also provided with a liquid injection hole 117, an explosion-proof valve 118, and a protective sheet 119 provided on the explosion-proof valve 118, and other conventional components.

[0115] In a second aspect, the utility model provides a battery, characterized in that the battery comprises the battery cover plate assembly 100 of any embodiment of the application.

[0116] The battery provided by the embodiment of the application further comprises a shell, a pole piece and electrolyte in the shell, and the shell is sealingly connected with the battery cover plate assembly 100, and the specific technical features and technical effects of the battery are consistent with those of the battery cover plate assembly 100, and the embodiment of the application will not be repeated here.

[0117] In a third aspect, the utility model provides an electric device, and the electric device comprises the battery of any embodiment of the application.

[0118] Specifically, the specific technical features and technical effects of the electric device are consistent with those of the battery cover plate assembly 100, and the embodiment of the application will not be repeated here.

[0119] It should be noted that the electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The electric device is not specially limited in the embodiments of the utility model.

[0120] The above description is merely preferred embodiments of the present application and a description of the technical principles used. Those skilled in the art should understand that the utility model range involved in the present application is not limited to the technical solutions formed by the specific combination of the technical features, and should also cover other technical solutions formed by the combination of the above technical features or equivalent features without departing from the utility model concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form the technical solutions.

Claims

1. A battery cover plate assembly (100) characterized by, The battery cover plate assembly (100) comprises a cover plate body (110), a pole column (120) and a first plastic part (130), 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 column mounting hole (113) penetrating through the first end face (111) and the second end face (112); the cover plate body (110) is provided with a pole column convex ring (115) protruding from the first end face (111) at the pole column mounting hole (113), the pole column (120) passes through the pole column convex ring (115) and the pole column mounting hole (113) in sequence from the side of the first end face (111) of the cover plate body (110), and the pole column (120) is arranged on the side of the first end face (111) of the cover plate body (110) relative to the pole column convex ring (115); the pole column convex ring (115) is provided with an annular compression part (116) extending inward along the circumference of the pole column mounting hole (113) at the side of the first end face (111) of the cover plate body (110), and at least one first anti-rotation groove (1160) is arranged on the side of the annular compression part (116) close to the pole column (120); the first plastic part (130) is partially arranged between the pole column (120) and the corresponding pole column convex ring (115), and the first plastic part (130) partially covers the outer surface of the corresponding pole column convex ring (115), the first plastic part (130) is formed by injection molding to form a first anti-rotation convex platform (133) matched with the first anti-rotation groove (1160), and the first anti-rotation convex platform (133) and the first anti-rotation groove (1160) are inserted and matched in the axial direction perpendicular to the pole column (120). the cover plate body (110) is provided with an annular support part (140) extending into the pole column mounting hole (113) close to the second end face (112), and the annular support part (140) is provided with a first annular protruding part (141) on the side close to the pole column (120); wherein, in the thickness direction of the cover plate body (110), the first annular protruding part (141) has a contact surface farther away from the second end face (112) relative to the annular support part (140); 2. The battery cover plate assembly (100) of claim 1, wherein, the battery cover plate assembly (100) further comprises a sealing part (150), the sealing part (150) is annularly arranged and provided with a first annular recess (153), the sealing part (150) is assembled between the pole column (120) and the annular support part (140), and the first annular protruding part (141) and the first annular recess (153) are concave-convex matched in the axial direction of the pole column (120). the annular support part (140) is provided with an annular groove (142) on the side close to the first plastic part (130); wherein, the first annular protruding part (141) is closer to the pole column (120) relative to the annular groove (142).

3. The battery cover plate assembly (100) of claim 2, wherein, ​ 4. The battery cover plate assembly (100) of claim 2, wherein, The annular support part (140) is provided with a first chamfer (143) at the first annular protruding part (141), the first chamfer (143) is obliquely arranged from the side end face of the annular support part (140) away from the first plastic part (130) to the inner side of the pole mounting hole (113).

5. The battery cover plate assembly (100) of claim 2, wherein, The first plastic part (130) comprises an annular top wall (131), the annular top wall (131) is sealed with the side wall of the pole (120) and covers the annular compression part (116) outside; The annular side wall (132) extends outward from the edge of the annular top wall (131), and the annular side wall (132) covers the pole protruding ring (115) outside; The edge of the annular top wall (131) extends along the axial direction of the pole (120) to form the first anti-rotation boss (133).

6. The battery cover plate assembly (100) of claim 5, wherein, The side wall of the pole (120) is provided with an annular boss (121), at least one second anti-rotation groove (1210) is arranged on the annular boss (121) in the circumferential direction, and the second anti-rotation groove (1210) is arranged in the axial direction of the pole (120) corresponding to the first anti-rotation groove (1160); The bottom of the annular top wall (131) extends along the axial direction of the pole (120) to form a second anti-rotation boss (134), the second anti-rotation boss (134) is fixedly connected with the first anti-rotation boss (133), and the second anti-rotation boss (134) is inserted and matched with the second anti-rotation groove (1210) in the axial direction of the pole (120).

7. The battery cover plate assembly (100) of claim 6, wherein, The battery cover plate assembly (100) further comprises an insulating support part (170), the insulating support part (170) comprises a first annular cylinder (171), the bottom end of the first annular cylinder (171) is fixedly connected with a second annular cylinder (172), the first annular cylinder (171) is arranged between the side wall of the pole (120) and the first plastic part (130), the top end of the first annular cylinder (171) is arranged flush with the annular compression part (116), and the bottom end of the first annular cylinder (171) is tightly matched with the upper end face of the annular boss (121). The second annular cylinder (172) is arranged between the first plastic part (130) and the pole protruding ring (115), the top end of the second annular cylinder (172) is tightly matched with the annular compression part (116), and the bottom end of the second annular cylinder (172) is tightly matched with the annular support part (140).

8. The battery cover plate assembly (100) of claim 7, wherein, A through hole (1721) is formed in the second annular cylinder (172) corresponding to the second anti-rotation groove (1210), the through hole (1721) is in communication with the second anti-rotation groove (1210), and the second anti-rotation boss (134) passes through the through hole (1721) and the second anti-rotation groove (1210) in sequence.

9. The battery cover plate assembly (100) according to any one of claims 2-8, characterized in that, The side of the cover plate body (110) close to the second end face (112) is further provided with a second plastic part (160), and the second plastic part (160) covers the second end face (112). The second plastic part (160) is provided with a through hole (161) penetrating along the axial direction of the pole (120) at the position corresponding to the pole mounting hole (113), the pole (120) penetrates the through hole (161) and is protruded relative to the side end face of the second plastic part (160) away from the annular support part (140), and the protruding height of the pole (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 annular protruding part (162) at the through hole (161), the second annular protruding part (162) is in pressure contact with the sealing part (150) along the axial direction of the pole (120).

11. The battery cover plate assembly (100) of claim 10, wherein, The second plastic part (160) is provided with a second annular recessed part (163) near the side of the annular support part (140), the second annular recessed part (163) is formed with the second annular protruding part (162) near the side of the pole (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 annular protruding part (162), the second chamfer (164) is inclined from the side end face of the second annular protruding part (162) near the sealing part (150) to the side inside 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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