Pole component, top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a pole component, a top cover assembly and a battery. The pole assembly comprises a pole body, a pole ring table and a pole clamping piece, the pole body is provided with a bearing part and a fixing part, the pole ring table is arranged on the bearing part and annularly arranged on the fixing part, and the pole clamping piece is arranged on the pole ring table and connected with the pole body; and the pole body and the pole ring table are made of different materials. The pole assembly can prevent cracking, improve stability and reliability, facilitate improvement of assembly efficiency and reduce processing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a pole assembly, top cover assembly and battery. BACKGROUND

[0002] Since the conductivity of copper is better than that of aluminum, and the cost of aluminum is relatively low, the negative pole of the existing power battery adopts a copper-aluminum composite form to balance between the conductivity and the manufacturing cost.

[0003] In the preparation of the above-mentioned composite negative pole, the copper part and the aluminum part are usually assembled by friction welding. However, the composite negative pole assembled by the friction welding process still has a high risk of cracking at the bonding surface of the copper part and the aluminum part, and the friction welding assembly method has high processing cost and low assembly efficiency.

[0004] Therefore, there is an urgent need for a pole assembly, top cover assembly and battery to solve the above problems. SUMMARY

[0005] According to one aspect of the utility model, the purpose is to provide a pole assembly that can prevent cracking, improve stability and reliability, and is beneficial to improving assembly efficiency and reducing processing cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The pole assembly comprises:

[0008] The pole body is provided with a bearing part and a fixed part;

[0009] The pole ring table is arranged on the bearing part and surrounds the fixed part;

[0010] The pole clamping piece is arranged on the pole ring table and connected with the pole body;

[0011] Wherein, the pole body and the pole ring table are made of different materials.

[0012] As a preferred scheme of the pole assembly provided by the utility model, the pole clamping piece is fixed on the pole ring table, the fixed part penetrates through the pole clamping piece and is fixedly connected with the pole clamping piece.

[0013] As a preferred scheme of the pole assembly provided by the utility model, the pole ring table is provided with a receiving groove, the pole clamping piece is arranged in the receiving groove, and the pole clamping piece is in interference fit with the inner wall of the receiving groove.

[0014] As the preferred scheme of the utility model provides, the riveting hole is arranged on the pole post clamping piece, the fixed part penetrates the riveting hole and is riveted with the riveting hole.

[0015] As the preferred scheme of the utility model provides, the pole post clamping piece and the pole post body are of the same material, and are welded with the pole post body.

[0016] As the preferred scheme of the utility model provides, the pole post body is further provided with a clamping part, the clamping part is fixedly connected to one side of the bearing part away from the fixed part, the bearing part penetrates the top cover body of the top cover assembly, the clamping part is connected to the second plastic part of the top cover assembly and is clamped to the top cover body, and the second plastic part is arranged on one side of the top cover body.

[0017] According to still another aspect of the utility model, a top cover assembly is provided, the top cover assembly comprises a top cover body, a first plastic part, a second plastic part and a fixing part, and further comprises the pole post assembly according to any one of the above schemes, the first plastic part and the second plastic part are arranged on opposite sides of the top cover body respectively; the pole post body penetrates the top cover body, the first plastic part and the second plastic part, one end of the pole post body is clamped on the first plastic part, and the other end is fixed on the second plastic part through the fixing part.

[0018] As the preferred scheme of the utility model provides, the top cover assembly further comprises a sealing part, and the sealing part is arranged between the pole post body and the top cover body.

[0019] As the preferred scheme of the utility model provides, the top cover body is further provided with a liquid injection hole and an explosion-proof valve, the liquid injection hole is used for injecting electrolyte into the battery cell in the shell, and the explosion-proof valve is used for bursting when the air pressure in the shell of the battery is too large, and the air is discharged outward.

[0020] According to still another aspect of the utility model, a battery is provided, the battery comprises a battery cell, a shell and the top cover assembly according to any one of the above schemes, the battery cell is contained in the shell, and the top cover assembly is covered on the opening of the shell.

[0021] The utility model has the advantages of:

[0022] The pole post assembly provided by the utility model comprises a pole post body, a pole post ring table and a pole post clamping piece. The pole post body is provided with a bearing part and a fixing part, the pole post ring table is arranged on the bearing part and annularly arranged on the fixing part, and the pole post clamping piece is arranged on the pole post ring table and connected with the pole post body. The pole post body and the pole post ring table are different in material. That is to say, the pole post ring table can be supported through the bearing part, and the pole post ring table can be pressed by the pole post clamping piece, so as to realize the clamping of the pole post ring table and the pole post body, the pole post ring table and the pole post body which are different in material can be connected without friction welding, and the risk of pole post cracking caused by friction welding is effectively prevented. And through the clamping connection mode of the pole post ring table and the pole post body, the assembly efficiency of the top cover assembly can be improved, the processing cost is reduced, and the integrity and reliability of the top cover assembly are improved.

[0023] The top cover assembly provided by the utility model is provided with the pole post assembly, and the assembly efficiency and reliability of the top cover assembly can be improved through the pole post assembly.

[0024] The battery provided by the utility model is provided with the top cover assembly. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings by the ordinary skilled in the art without creating labor.

[0026] Figure 1 is the exploded schematic view of the top cover assembly provided by the embodiments of the utility model;

[0027] Figure 2 is the top view of the top cover assembly provided by the embodiments of the utility model;

[0028] Figure 3 is Figure 2 the sectional view in the direction of A-A in Fig. 1;

[0029] Figure 4 is Figure 3 the local enlarged view of the structure marked as B in Fig. 1.

[0030] In the drawings:

[0031] 10, first plastic part; 20, top cover body; 21, liquid injection hole; 22, explosion-proof valve; 30, second plastic part; 40, sealing piece; 50, fixing piece;

[0032] 100, pole post body; 110, bearing part; 120, fixing part; 121, flange structure; 130, clamping part;

[0033] 200, pole post ring table; 210, clamping part; 220, connecting part;

[0034] 300, pole post clamping piece; 310, riveting hole. DETAILED DESCRIPTION

[0035] The technical solutions of the utility model will be further described below in combination with the drawings and through specific embodiments.

[0036] To make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0038] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0040] In the description of the utility model, need explanation further, unless another explicit provision and limitation, term "arrangement", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electric connection. For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0041] In the utility model, unless another explicit provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but are in contact through another feature between them. Moreover, first feature "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature. First feature "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0042] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0043] The embodiment provides a pole assembly, a top cover assembly and a battery. The battery comprises a shell (not shown in the figure), a battery cell (not shown in the figure) and the top cover assembly provided by the embodiment. The battery cell is arranged in the shell, and the top cover assembly is capped at the opening of the shell to seal the battery cell in the shell.

[0044] Figure 1 An exploded schematic view of the top cover assembly provided by the embodiment of the utility model is shown, Figure 2 A top view of the top cover assembly provided by the embodiment of the utility model is shown. Refer to Figure 1 And Figure 2 The top cover assembly provided by the embodiment comprises a top cover body 20, a first plastic part 10, a second plastic part 30 and a fixing part 50, and further comprises the pole assembly provided by the embodiment.

[0045] The first plastic part 10 and the second plastic part 30 are respectively arranged on opposite sides of the top cover body 20, and the first plastic part 10 is fixedly arranged on the side of the top cover body 20 away from the shell, and the second plastic part 30 is fixedly arranged on the side of the top cover body 20 facing the shell. The top cover body 20 is provided with a pole through hole, the pole body 100 is connected to the second plastic part 30 and penetrates through the pole through hole and the first plastic part 10, and is connected to the first plastic part 10. The pole assembly can be connected to an external electrical equipment to supply power to it.

[0046] Specifically, a plurality of protruding structures are arranged on the side of the top cover body 20 away from the shell, and a plurality of plug-in grooves corresponding to the protruding structures are arranged on the first plastic part 10, and the protruding structures can be inserted into the plug-in grooves. Through the above arrangement, the installation of the first plastic part 10 on the top cover body 20 can be realized, and the first plastic part 10 can be positioned to prevent the first plastic part 10 from rotating relative to the top cover body 20.

[0047] Further specifically, the top cover body 20 is further provided with a liquid injection hole 21 and an explosion-proof valve 22, the liquid injection hole 21 is used for injecting electrolyte into the battery cell in the shell, and the explosion-proof valve 22 is used for bursting when the air pressure in the shell of the battery is too large to discharge air outward.

[0048] Further specifically, the pole assembly includes a pole body 100, a pole ring table 200 and a pole clamping piece 300. The material of the pole body 100 is different from that of the pole ring table 200, and the material of the pole clamping piece 300 is the same as that of the pole body 100. In this embodiment, the materials of the pole body 100 and the pole clamping piece 300 are copper, and the material of the pole ring table 200 is aluminum.

[0049] More specifically, the pole body 100 is connected to the second plastic part 30 and is provided with a bearing part 110, and the pole ring table 200 is annularly arranged on the pole body 100. The pole ring table 200 is provided with a containing groove, the pole clamping piece 300 is arranged in the containing groove and is in interference fit with the inner wall of the containing groove. The pole clamping piece 300 is arranged in the bearing part 110 to form a clamping ring groove, and the pole ring table 200 is clamped in the clamping ring groove. The bearing part 110 can support the pole ring table 200, and the pole clamping piece 300 can press the pole ring table 200 to realize the clamping of the pole ring table 200 and the pole body 100, and the friction welding connection between the two is not needed, which effectively prevents the cracking risk between the two.

[0050] More specifically, the fixing member 50 is annular in structure, fixed to the first plastic member 10, and circumferentially arranged around the pole ring platform 200. The first plastic member 10 is also annular in structure, and has a first mounting ring groove arranged around the inner side thereof. The fixing member 50 can be embedded in and fixed to the first mounting ring groove. The inner side of the fixing member 50 is welded to the outer circumferential side of the pole ring platform 200. Through the fixing member 50, the connection between the pole body 100 and the first plastic member 10 can be ensured, and the integrity of the pole body 100 and the top cover body 20 can be ensured.

[0051] More specifically, the inner wall of the first mounting ring groove is provided with a plurality of female clamping members, and the fixing member 50 is provided with a plurality of male clamping members. The male clamping members can correspond to and be connected to the female clamping members. Through the above arrangement, the reliability of the connection and fixation of the fixing member 50 and the first plastic member 10 can be ensured, and the relative rotation and displacement of the fixing member 50 and the first plastic member 10 can be prevented. Since the fixing member 50 is welded to the pole ring platform 200, the relative rotation of the pole ring platform 200 and the first plastic member 10 can be prevented, and the anti-twist arrangement of the pole ring platform 200 and the top cover body 20 can be achieved. The matching assembly mode of the female clamping members and the male clamping members can be the matching of a clamping groove and a clamping block or other modes, and the specific form is subject to the relative fixation of the fixing member 50 and the first mounting ring groove.

[0052] Figure 3 a sectional view taken along the line A-A; Figure 2 a sectional view taken along the line A-A; Figure 4 a sectional view taken along the line A-A; Figure 3 a sectional view taken along the line A-A; Figure 3 and Figure 4 The pole ring platform 200 includes a clamping portion 210 and a connecting portion 220 integrally formed. Both the clamping portion 210 and the connecting portion 220 are annular in structure. The clamping portion 210 is clamped in the clamping ring groove, and the connecting portion 220 protrudes from the side of the clamping portion 210 away from the bearing portion 110 and is configured to connect an electrical connecting member. In the present embodiment, the electrical connecting member can be an aluminum bar, so as to realize connection with external equipment through the aluminum bar. The ring width of the connecting portion 220 is specifically greater than 4 mm, so as to provide sufficient welding space for the aluminum bar.

[0053] Continuing to refer to Figure 3 and Figure 4The fixed part 120 is arranged at the geometric center of the bearing part 110 and protrudes from the bearing part 110. The pole ring table 200 is arranged around the periphery of the fixed part 120, and the pole clamping piece 300 is connected to the top of the fixed part 120 away from the bearing part 110 by welding. The diameter of the bearing part 110 is greater than the diameter of the fixed part 120, so as to provide upward supporting force for the pole ring table 200 and rivet pressing. The bearing part 110 and the pole ring table 200 are in abutting contact, so that the bearing part 110 and the pole ring table 200 form a passage, thereby forming a current passage therebetween.

[0054] Preferably, in the present embodiment, the diameter of the fixed part 120 is greater than 7 mm, thereby ensuring overcurrent and ensuring the conductivity of the pole assembly.

[0055] Optionally, the ratio of the ring width of the connecting part 220 to the diameter of the fixed part 120 is 1:2. Through the above arrangement, the connecting part 220 can provide sufficient welding space for the aluminum bar, and the riveting effect of the fixed part 120 can be ensured.

[0056] Specifically, referring to Figure 4 The top of the fixed part 120 is provided with a flange structure 121, the pole clamping piece 300 is in a ring structure, a riveting hole 310 is arranged therein, a step structure is formed on the inner side of the riveting hole 310, the fixed part 120 penetrates through the riveting hole 310 and is riveted with the riveting hole 310, the flange structure 121 can abut against the step structure, and then the top of the fixed part 120 and the pole clamping piece 300 are connected by laser welding, so as to ensure the stability and reliability of the connection.

[0057] It should be noted that the pole clamping piece 300 is arranged in a ring structure, which can ensure the abutting effect of the pole clamping piece 300 on the upper end surface of the clamping part 210 and ensure the assembly reliability between the pole clamping piece 300 and the pole ring table 200.

[0058] Preferably, the pole ring table 200 is in interference fit with the groove wall of the clamping ring groove, that is, the lower end surface of the pole clamping piece 300, the periphery of the fixed part 120 and the upper end surface of the bearing part 110 are in close abutment, so as to ensure the assembly reliability.

[0059] In detail, the pole body 100 is further provided with a clamping portion 130. The clamping portion 130 is fixedly connected to the bearing portion 110 and is located on the side of the bearing portion 110 away from the fixed portion 120. The diameter of the clamping portion 130 is greater than that of the bearing portion 110, and the clamping portion 130 protrudes from the bearing portion 110 in the circumferential direction. The bearing portion 110 penetrates the pole hole of the top cover body 20, and the clamping portion 130 is fixedly connected to the second plastic part 30 and can be clamped to the side of the top cover body 20 facing the shell.

[0060] Preferably, the fixed portion 120, the bearing portion 110, and the clamping portion 130 are integrally formed. Through the above arrangement, the connection strength of the fixed portion 120, the bearing portion 110, and the clamping portion 130 is improved, thereby ensuring the structural reliability of the pole body 100 as a whole.

[0061] Continuing to refer to Figure 4 The top cover assembly further includes a sealing member 40. The sealing member 40 specifically has a ring structure and is clamped between the pole body 100 and the top cover body 20. The axial cross section of the sealing member 40 has an L-shaped structure and includes a first sealing portion and a second sealing portion integrally formed. The first sealing portion is clamped between the inner wall of the pole hole and the circumferential side of the bearing portion 110. The upper end surface of the first sealing portion protrudes out of the pole hole and abuts against the lower end surface of the first plastic part 10. The second sealing portion extends away from the bearing portion 110 to form a seal between the upper end surface of the clamping portion 130 and the side of the top cover body 20 facing the shell. Through the sealing member 40, the sealing performance of the top cover assembly can be ensured. In the embodiment, the sealing member 40 can be made of rubber or silicone.

[0062] Obviously, the above embodiments of the present application are merely examples for clear illustration of the present application and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent substitution, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A pole assembly, characterized by The application relates to a polar column assembly. The polar column body (100) is provided with a bearing part (110) and a fixing part (120). The polar column ring table (200) is arranged on the bearing part (110) and surrounds the fixing part (120). The polar column clamping piece (300) is arranged on the polar column ring table (200) and is connected with the polar column body (100). The polar column body (100) and the polar column ring table (200) are made of different materials.

2. The pole assembly of claim 1, wherein, The fixing part (120) penetrates the polar column clamping piece (300) and is fixedly connected with the polar column clamping piece (300).

3. The pole assembly of claim 2, wherein, The polar column ring table (200) is provided with a containing groove, the polar column clamping piece (300) is arranged in the containing groove and is in interference fit with the inner wall of the containing groove.

4. The pole assembly of claim 1, wherein, The polar column clamping piece (300) is provided with a riveting hole (310), the fixing part (120) penetrates the riveting hole (310) and is riveted with the riveting hole (310).

5. The pole assembly of claim 1, wherein, The polar column clamping piece (300) and the polar column body (100) are made of the same material and are welded with each other.

6. The pole assembly of any one of claims 1-5, wherein, The polar column body (100) is further provided with a clamping part (130), the clamping part (130) is fixedly connected with the bearing part (110) and is arranged on the side of the bearing part (110) away from the fixing part (120), the bearing part (110) penetrates the top cover body (20) of a top cover assembly, the clamping part (130) is connected with a second plastic part (30) of the top cover assembly and is clamped on the top cover body (20), and the second plastic part (30) is arranged on one side of the top cover body (20).

7. A roof assembly characterized by, The application relates to a top cover assembly.

8. The header assembly of claim 7, wherein, The top cover assembly further comprises a sealing part (40), the sealing part (40) is clamped between the polar column body (100) and the top cover body (20).

9. The header assembly of claim 7, wherein, The top cover body (20) is further provided with a liquid injection hole (21) and an explosion-proof valve (22), the liquid injection hole (21) is used for injecting electrolyte into an electric core in a shell of a battery, and the explosion-proof valve (22) is used for bursting when the air pressure in the shell of the battery is too large and discharging air outward.

10. A battery characterized by The application relates to a battery. The battery comprises an electric core, a shell and the top cover assembly.

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