Insulating part, cover plate assembly, battery and vehicle

Abstract

The utility model provides an insulator, cover plate subassembly, battery and vehicle, the insulator is used for setting up between electrode subassembly and top cover piece, on the insulator is provided with boss structure, on the boss structure is provided with through-hole and at least two raised structure that surround the through-hole periphery interval setting up, and the boss structure is provided with the through-hole. The through hole is opposite to a liquid injection hole in the top cover plate, and the protruding structure is used for abutting against the electrode assembly. According to the utility model, the at least two convex structures are matched to form the open convex structure, so that the through hole can be effectively prevented from being blocked by an adhesive tape in the electrode assembly or the battery, the liquid injection hole is effectively prevented from being blocked by the adhesive tape in the electrode assembly or the battery, and the electrolyte is ensured to be injected smoothly; the protruding structure is used for abutting against the electrode assembly, so that a certain insulation gap is maintained between the electrode assembly and the top cover plate, a good insulation protection effect is provided, the risk of insulation failure of the electrode assembly and the top cover plate is reduced, and the use reliability is good.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an insulating component, a cover plate assembly, a battery, and a vehicle. Background Technology

[0002] Currently, the mainstream batteries used in the market are prismatic hard-shell batteries, which mainly consist of a casing, electrode assembly, and cover assembly. The cover assembly has a top cover plate. The casing provides a sealed space to accommodate the electrode assembly and electrolyte. The electrode assembly outputs electrical energy from inside the sealed space to the terminals outside the sealed space through the terminals on the cover assembly. During the manufacturing process, electrolyte needs to be injected into the battery through the injection hole in the top cover plate. An insulating component is placed between the top cover plate and the electrode assembly to insulate them from each other, preventing the electrode tabs from contacting the top cover plate and causing safety risks such as short circuits and corrosion.

[0003] Existing insulating components use perforations or grooves at the corresponding positions of the electrolyte injection holes on the top cover to prevent blockage. However, this cannot completely eliminate the possibility of tape from the electrode assembly or inside the battery blocking the injection holes, causing poor electrolyte injection and posing a risk of insulation failure between the electrode assembly and the top cover. Therefore, there is an urgent need to design an insulating component that ensures good insulation performance while preventing blockage of the injection holes. Summary of the Invention

[0004] This invention provides an insulating component, a cover plate assembly, a battery, and a vehicle to solve the problems of existing insulating components blocking the liquid injection hole and the risk of insulation failure between the electrode assembly and the top cover plate.

[0005] An insulating component is provided between an electrode assembly and a top cover plate; the insulating component has a boss structure, the boss structure has a through hole and at least two raised structures spaced apart around the periphery of the through hole, the through hole is disposed opposite to a liquid injection hole on the top cover plate, and the raised structures are used to abut against the electrode assembly.

[0006] Preferably, the insulating component includes an insulating body and two fixing portions respectively disposed at both ends of the insulating body, the insulating body and the two fixing portions cooperating to form an accommodating space for accommodating the electrode assembly;

[0007] The boss structure is disposed on the insulating body.

[0008] Preferably, the boss structure has a groove on one side of the top cover plate; the groove is used to accommodate the top cover protrusion on the top cover plate, and the top cover protrusion has the injection hole.

[0009] Preferably, the at least two protruding structures comprise two first protrusions and two second protrusions, the two first protrusions and the two second protrusions are staggered.

[0010] The first protrusion has a width along a circumferential direction greater than a width of the second protrusion along the circumferential direction, the first protrusion is configured to abut against a tab of the electrode assembly, and the second protrusion is configured to abut against a tape of the electrode assembly.

[0011] Preferably, the insulating member is a plastic member.

[0012] A cover plate assembly comprises the insulating member and a top cover sheet; the insulating member is installed on an inner side of the top cover sheet.

[0013] Preferably, a plurality of stoppers are arranged on a side of the insulating member close to the electrode assembly, and the plurality of stoppers cooperatively form an installation space.

[0014] The top cover sheet is provided with a pole;

[0015] The cover plate assembly further comprises a connecting member installed in the installation space and configured to connect the pole and the electrode assembly.

[0016] Preferably, the connecting member comprises a main body and two connecting portions extending from two side edges of one end of the main body in the same direction.

[0017] The main body is connected to the pole, and the two connecting portions are respectively located on two sides of the boss structure of the insulating member.

[0018] A battery comprises a shell, an electrode assembly, a pole, and the cover plate assembly.

[0019] The electrode assembly is installed in the shell, the cover plate assembly is arranged on the electrode assembly, and the pole is arranged on the cover plate assembly.

[0020] A vehicle comprises the battery.

[0021] The at least two protruding structures in the insulating member cooperatively form an open protruding structure, which can effectively prevent the through hole from being blocked by the electrode assembly or the tape inside the battery, thereby effectively preventing the liquid injection hole from being blocked by the electrode assembly or the tape inside the battery and ensuring smooth injection of electrolyte; the protruding structure is configured to abut against the electrode assembly, so that a certain insulating gap is maintained between the electrode assembly and the top cover sheet, good insulating protection is provided, the risk of insulating failure of the electrode assembly and the top cover sheet is reduced, and good use reliability is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 is the axial side view of the insulating part in an embodiment of the present application;

[0024] Figure 2 is Figure 1 the sectional view of A-A in the figure;

[0025] Figure 3 is the axial side view of the cover plate assembly in an embodiment of the present application;

[0026] Figure 4 is the axial side view of the battery in an embodiment of the present application;

[0027] Figure 5 is the sectional view of the battery in an embodiment of the present application.

[0028] 1, insulating part; 101, insulating main body; 102, fixed part; 103, air hole; 104, mounting hole; 2, electrode assembly; 21, electrode main body; 22, tab; 3, top cover sheet; 31, top cover protrusion; 32, liquid injection hole; 4, boss structure; 5, through hole; 6, protrusion structure; 61, first protrusion; 62, second protrusion; 7, groove; 8, stop block; 9, connecting piece; 91, main body part; 92, connecting part; 10, pole; 11, shell; 12, adhesive tape. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical schemes and beneficial effects solved by the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0030] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0031] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] The utility model embodiment provides a kind of insulation 1, refer to Figures 1-5 Insulation 1 is used to be arranged between electrode assembly 2 and top cover sheet 3, and insulation 1 is provided with boss structure 4, boss structure 4 is provided with through hole 5 and at least two protruding structures 6 that are arranged at the periphery of through hole 5, and through hole 5 is arranged opposite to liquid injection hole 32 on top cover sheet 3, and protruding structure 6 is used to abut with electrode assembly 2.

[0033] As an example, insulation 1 is arranged between electrode assembly 2 and top cover sheet 3, and insulation protection is played to electrode assembly 2;Liquid injection hole 32 on top cover sheet 3 is used as the channel for material exchange between inside and outside of battery.In insulation 1 is provided with boss structure 4, boss structure 4 is provided with through hole 5 and at least two protruding structures 6 that are arranged at the periphery of through hole 5, and through hole 5 is arranged opposite to liquid injection hole 32 on top cover sheet 3;In this way, at least two protruding structures 6 cooperate to form open protruding structure 6, which can effectively prevent through hole 5 from being blocked by electrode assembly 2 or adhesive tape 12 inside the battery, thereby realizing effective prevention of liquid injection hole 32 from being blocked by electrode assembly 2 or adhesive tape 12 inside the battery, and ensuring smooth injection of electrolyte;Protruding structure 6 is used to abut with electrode assembly 2, so that a certain insulation gap is maintained between electrode assembly 2 and top cover sheet 3, good insulation protection is provided, the risk of insulation failure of electrode assembly 2 and top cover sheet 3 is reduced, and good use reliability is achieved.

[0034] In an embodiment, refer to Figure 1 、 Figure 2 AndFigure 3 The insulating piece 1 comprises an insulating body 101 and two fixing portions 102 respectively arranged at two ends of the insulating body 101, and the insulating body 101 and the two fixing portions 102 cooperatively form a containing space for containing the electrode assembly 2; and the boss structure 4 is arranged on the insulating body 101.

[0035] As an example, the insulating piece 1 comprises the insulating body 101 and the two fixing portions 102 respectively arranged at two ends of the insulating body 101, and the insulating body 101 and the two fixing portions 102 cooperatively form the containing space for containing the electrode assembly 2; specifically, the two fixing portions 102 are mounted on the electrode body 21 of the electrode assembly 2, and the tab 22 of the electrode assembly 2 is located in the containing space. The boss structure 4 is arranged on the insulating body 101, so that the tab 22 of the electrode assembly 2 and the top cover sheet 3 can maintain a certain insulating gap, a good insulating protection effect is provided, the risk of insulating failure of the electrode assembly 2 and the top cover sheet 3 is reduced, and good use reliability is achieved. In the example, the air holes 103 are arranged on the fixing portions 102, so as to facilitate the discharge of the gas inside the battery; and the mounting holes 104 are arranged on the insulating body 101, so as to mount the pole 10.

[0036] In an embodiment, referring to Figure 2 and Figure 5 , the boss structure 4 is provided with a groove 7 on one side surface close to the top cover sheet 3; the groove 7 is used for containing the top cover protrusion 31 on the top cover sheet 3; and the top cover protrusion 31 is provided with the liquid injection hole 32.

[0037] As an example, the top cover protrusion 31 is provided with the liquid injection hole 32, and the liquid injection hole 32 serves as a channel for material exchange between the inside and the outside of the battery. The groove 7 is arranged on one side surface of the boss structure 4 close to the top cover sheet 3; the groove 7 can contain the top cover protrusion 31 on the top cover sheet 3, so that the connection between the insulating piece 1 and the top cover sheet 3 is more close, the liquid injection hole 32 is ensured to be in communication with the through hole 5, the liquid injection flow channel is more smooth, the liquid injection is faster, and material is saved.

[0038] In an embodiment, referring to Figure 1 , Figure 2 and Figure 5 , the at least two protrusion structures 6 comprise two first protrusions 61 and two second protrusions 62, and the two first protrusions 61 and the two second protrusions 62 are arranged alternately; the width of the first protrusion 61 in the circumferential direction is greater than the width of the second protrusion 62 in the circumferential direction, the first protrusion 61 is used for abutting against the tab 22 of the electrode assembly 2, and the second protrusion 62 is used for abutting against the adhesive tape 12 of the electrode assembly 2.

[0039] As an example, the at least two protruding structures 6 include two first protrusions 61 and two second protrusions 62, and the two first protrusions 61 and the two second protrusions 62 are staggered when installed, forming an open protruding structure 6, which can effectively prevent the through hole 5 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery, thereby effectively preventing the liquid injection hole 32 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery, ensuring smooth injection of electrolyte; the protruding structure 6 is used to abut against the electrode assembly 2, so as to maintain a certain insulation gap between the electrode assembly 2 and the top cover sheet 3, provide good insulation protection, reduce the risk of insulation failure of the electrode assembly 2 and the top cover sheet 3, and have good use reliability. The width of the first protrusion 61 in the circumferential direction is greater than the width of the second protrusion 62 in the circumferential direction, and the height of the first protrusion 61 and the second protrusion 62 in the axial direction can be the same or different. The first protrusion 61 is used to abut against the tab 22 of the electrode assembly 2, and the second protrusion 62 is used to abut against the adhesive tape 12 of the electrode assembly 2, which can effectively prevent the electrolyte from washing the tab 22 and reduce the risk of insulation failure of the electrode assembly 2 and the top cover sheet 3.

[0040] In an embodiment, the insulating piece 1 is a plastic piece.

[0041] As an example, the insulating piece 1 is a plastic piece, which provides insulation protection for the electrode assembly 2. The material of the insulating piece 1 can be PP / PC / PET / PPS / PBT / PI, etc., and modified derivatives thereof.

[0042] The utility model discloses an embodiment provides a cover plate assembly, refer to Figures 3-5 , including top cover sheet 3 and insulating piece 1, insulating piece 1 installs inside top cover sheet 3.

[0043] As an example, the cover plate assembly includes a top cover sheet 3 and an insulating piece 1; the insulating piece 1 is installed on the inner side of the top cover sheet 3, and specifically, the insulating piece 1 is arranged between the electrode assembly 2 and the top cover sheet 3 to provide insulation protection for the electrode assembly 2; the liquid injection hole 32 on the top cover sheet 3 serves as a channel for material exchange between the inside and the outside of the battery. A boss structure 4 is provided on the insulating piece 1, the boss structure 4 is provided with a through hole 5 and at least two protruding structures 6 arranged at intervals around the outer periphery of the through hole 5, the through hole 5 is arranged opposite the liquid injection hole 32 on the top cover sheet 3, and the protruding structure 6 is used to abut against the electrode assembly 2; in this way, the at least two protruding structures 6 cooperate to form an open protruding structure 6, which can effectively prevent the through hole 5 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery, thereby effectively preventing the liquid injection hole 32 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery, ensuring smooth injection of electrolyte; the protruding structure 6 is used to abut against the electrode assembly 2, so as to maintain a certain insulation gap between the electrode assembly 2 and the top cover sheet 3, provide good insulation protection, reduce the risk of insulation failure of the electrode assembly 2 and the top cover sheet 3, and have good use reliability.

[0044] In an embodiment, referring to Figure 1 and Figure 3 The insulating piece 1 is provided with a plurality of stoppers 8 on the side close to the electrode assembly 2, and the plurality of stoppers 8 cooperatively form a mounting space; the top cover sheet 3 is provided with a pole 10; the cover plate assembly further comprises a connecting piece 9, which is installed in the mounting space and used to connect the pole 10 and the electrode assembly 2.

[0045] As an example, the cover plate assembly further comprises a connecting piece 9, and the insulating piece 1 is provided with a plurality of stoppers 8 on the side close to the electrode assembly 2, and the plurality of stoppers 8 cooperatively form a mounting space, which facilitates the installation of the connecting piece 9. The top cover sheet 3 is provided with a pole 10, and when installed, the connecting piece 9 is installed in the mounting space and used to connect the pole 10 and the electrode assembly 2, so that the electrical energy of the battery can be output from the sealed space to the pole 10 outside the sealed space through the electrode assembly 2 and the connecting piece 9.

[0046] In an embodiment, referring to Figure 3 The number of the insulating pieces 1 is two, and the two insulating pieces 1 are oppositely arranged on the top cover sheet 3 so as to correspond to the two tabs 22 of the electrode assembly 2, thereby ensuring that the two tabs 22 of the electrode assembly 2 and the top cover sheet 3 maintain a certain insulating gap, providing good insulating protection, reducing the risk of insulating failure of the electrode assembly 2 and the top cover sheet 3, and having good use reliability.

[0047] In an embodiment, referring to Figure 3 The connecting piece 9 comprises a main body part 91 and two connecting parts 92 extending from the two side edges of one end of the main body part 91 in the same direction; the main body part 91 is connected with the pole 10, and the two connecting parts 92 are respectively located on the two sides of the boss structure 4 of the insulating piece 1.

[0048] As an example, the connecting piece 9 comprises a main body part 91 and two connecting parts 92; the two connecting parts 92 are respectively components extending from the two side edges of one end of the main body part 91 in the same direction, and the two extending connecting parts 92 can provide more connecting space and reduce contact impedance. The main body part 91 is connected with the pole 10, so that the electrical energy of the battery can be output from the sealed space to the pole 10 outside the sealed space through the electrode assembly 2 and the connecting piece 9. The two connecting parts 92 are respectively located on the two sides of the boss structure 4 of the insulating piece 1, so that an electrolyte flow space can be reserved, and the through hole 5 on the boss structure 4 is prevented from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery.

[0049] The utility model embodiment provides a kind of battery, referring to Figure 3 , Figure 4 and Figure 5The battery comprises a shell 11, an electrode assembly 2, a pole 10 and a cover plate assembly; the electrode assembly 2 is installed in the shell 11, the cover plate assembly is arranged on the electrode assembly 2, and the pole 10 is arranged on the cover plate assembly.

[0050] As an example, the battery comprises a shell 11, an electrode assembly 2, a pole 10 and a cover plate assembly; when installed, the electrode assembly 2 is installed in the shell 11, the cover plate assembly is arranged on the electrode assembly 2, and the pole 10 is arranged on the cover plate assembly; the cover plate assembly comprises a top cover sheet 3 and an insulating piece 1; the insulating piece 1 is installed on the inner side of the top cover sheet 3, and specifically, the insulating piece 1 is arranged between the electrode assembly 2 and the top cover sheet 3, thereby playing an insulating protection role on the electrode assembly 2; a liquid injection hole 32 on the top cover sheet 3 serves as a channel for material exchange between the inside and the outside of the battery. A boss structure 4 is arranged on the insulating piece 1, the boss structure 4 is provided with a through hole 5 and at least two protruding structures 6 arranged at intervals around the periphery of the through hole 5, the through hole 5 is arranged opposite to the liquid injection hole 32 on the top cover sheet 3, and the protruding structures 6 are used for abutting against the electrode assembly 2; in this way, the at least two protruding structures 6 cooperatively form an open protruding structure 6, which can effectively prevent the through hole 5 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery, thereby achieving effective prevention of the liquid injection hole 32 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery and ensuring smooth injection of electrolyte; the protruding structures 6 are used for abutting against the electrode assembly 2, so that a certain insulating gap is maintained between the electrode assembly 2 and the top cover sheet 3, a good insulating protection role is provided, the risk of insulating failure of the electrode assembly 2 and the top cover sheet 3 is reduced, and good use reliability is achieved.

[0051] In an embodiment, referring to Figure 5 The electrode assembly 2 comprises an electrode body 21 and two tab ears 22, and the two tab ears 22 are components extending from the electrode body 21; when installed, the cover plate assembly is arranged on the electrode body 21, and the cover plate assembly comprises two insulating pieces 1; each tab ear 22 is arranged opposite to one insulating piece 1, so that a certain insulating gap is maintained between the two tab ears 22 of the electrode assembly 2 and the top cover sheet 3, a good insulating protection role is provided, the risk of insulating failure of the electrode assembly 2 and the top cover sheet 3 is reduced, and good use reliability is achieved.

[0052] The utility model embodiment provides a kind of vehicle, including battery.

[0053] As an example, the vehicle includes a battery, the battery includes a shell 11, an electrode assembly 2, a pole 10 and a cover plate assembly; when installed, the electrode assembly 2 is installed in the shell 11, the cover plate assembly is arranged on the electrode assembly 2, and the pole 10 is arranged on the cover plate assembly; the cover plate assembly includes a top cover sheet 3 and an insulating piece 1; the insulating piece 1 is installed on the inner side of the top cover sheet 3, and specifically, the insulating piece 1 is arranged between the electrode assembly 2 and the top cover sheet 3, and plays an insulating protection role on the electrode assembly 2; a liquid injection hole 32 on the top cover sheet 3 serves as a channel for material exchange between the inside and outside of the battery. A boss structure 4 is arranged on the insulating piece 1, the boss structure 4 is provided with a through hole 5 and at least two protruding structures 6 arranged at intervals around the periphery of the through hole 5, the through hole 5 is arranged opposite to the liquid injection hole 32 on the top cover sheet 3, and the protruding structures 6 are used for abutting against the electrode assembly 2; in this way, the at least two protruding structures 6 cooperatively form an open protruding structure 6, which can effectively prevent the through hole 5 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery, thereby realizing effective prevention of the liquid injection hole 32 from being blocked by the electrode assembly 2 or the adhesive tape 12 inside the battery and ensuring smooth injection of electrolyte; the protruding structures 6 are used for abutting against the electrode assembly 2, so that a certain insulating gap is maintained between the electrode assembly 2 and the top cover sheet 3, a good insulating protection effect is provided, the risk of insulating failure of the electrode assembly 2 and the top cover sheet 3 is reduced, and good use reliability is achieved.

[0054] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An insulator for placement between an electrode assembly and a cover sheet; characterized by, The insulating piece is provided with a boss structure, the boss structure is provided with a through hole and at least two protruding structures arranged at intervals around the periphery of the through hole, the through hole is arranged opposite to the liquid injection hole on the top cover sheet, and the protruding structures are used for abutting against the electrode assembly.

2. The insulator of claim 1, wherein The insulating piece comprises an insulating body and two fixing parts respectively arranged at two ends of the insulating body, and the insulating body and the two fixing parts cooperatively form a containing space for containing the electrode assembly. The boss structure is arranged on the insulating body.

3. The insulator of claim 1, wherein The boss structure is provided with a groove on a side surface close to the top cover sheet, the groove is used for containing a top cover protrusion on the top cover sheet, and the top cover protrusion is provided with the liquid injection hole.

4. The insulator of claim 1, wherein The at least two protruding structures comprise two first protrusions and two second protrusions, and the two first protrusions and the two second protrusions are arranged alternately. The width of the first protrusion in the circumferential direction is greater than the width of the second protrusion in the circumferential direction, the first protrusion is used for abutting against the tab of the electrode assembly, and the second protrusion is used for abutting against the adhesive tape of the electrode assembly.

5. The insulator of claim 1, wherein The insulating piece is a plastic piece.

6. A cover plate assembly characterized by, The battery comprises a top cover sheet and the insulating piece according to any one of claims 1-5, and the insulating piece is mounted on the inner side of the top cover sheet.

7. The cover plate assembly of claim 6, wherein, The insulating piece is provided with a plurality of stoppers arranged at intervals on a side surface close to the electrode assembly, and the plurality of stoppers cooperatively form a mounting space. The top cover sheet is provided with a pole; The cover plate assembly further comprises a connecting piece mounted in the mounting space and used for connecting the pole and the electrode assembly.

8. The cover plate assembly of claim 7, wherein, The connecting piece comprises a main body part and two connecting parts extended from two side edges of one end of the main body part in the same direction. The main body part is connected with the pole, and the two connecting parts are respectively located on two sides of the boss structure of the insulating piece.

9. A battery, characterized by The battery comprises a shell, an electrode assembly, a pole and the cover plate assembly according to any one of claims 6-8. The electrode assembly is mounted in the shell, the cover plate assembly is arranged on the electrode assembly, and the pole is arranged on the cover plate assembly.

10. A vehicle characterized by comprising: The battery comprises the battery according to claim 9.

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