Insulation structure of battery cell, battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to an insulation structure of a battery cell, a battery and electric equipment, which comprises an insulation main body, a first separation part and a separation body, the first separating part is connected to the insulating main body; the first separating part is bent around the surface of the insulating main body; a first groove is formed between the first separating part and the insulating main body; the separating body is arranged on the insulating main body; a guide channel is arranged in the separation body; and one end of the guide channel is communicated with the first groove. According to the utility model, the use stability and safety of the battery can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field, and particularly relates to an insulation structure of an electric core, a battery and an electrical equipment using the same. Background Art

[0002] Generally, after the winding process of the electric core is completed, an adhesive tape is wound around the positive electrode tab to prevent the flattened foil area from contacting the steel shell and causing a short circuit. However, in the actual production process, the wound adhesive tape is prone to warping and glue overflow, resulting in difficulties in installing the upper insulating sheet. At the same time, the winding of the adhesive tape will lead to complex production processes, low efficiency, and difficult infiltration of the electrolyte; therefore, the safety and stability of use will be reduced. Summary of the Utility Model

[0003] The purpose of the utility model is to provide, in view of the deficiencies of the prior art, an insulation structure of an electric core, which can solve the technical problem of low safety and stability in the existing use.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An insulation structure of an electric core includes an insulation main body, a first partition member and a partition body; the first partition member is connected to the insulation main body; and the first partition member is bent around the surface of the insulation main body; and a first groove is formed between the first partition member and the insulation main body; the partition body is arranged on the insulation main body; and a guiding channel is arranged in the partition body; one end of the guiding channel is communicated with the first groove.

[0006] Preferably: the partition body protrudes from the surface of the insulation main body; and the partition body and the first partition member are respectively oppositely arranged on the insulation main body;

[0007] And / or, the first partition member is arranged around the side end surface of the insulation main body.

[0008] Preferably: the insulation structure of the electric core further includes a second partition member; the second partition member is connected to the side end of the insulation main body and is bent towards the insulation main body; and a second groove is arranged between the second partition member and the insulation main body; the second groove and the first groove are correspondingly arranged on the insulation main body.

[0009] Preferably: the second partition member is arranged around the side end surface of the insulation main body.

[0010] Preferably: the protruding height L2 of the partition body; the value range of L2 is: 1mm ≤ L2 ≤ 5mm;

[0011] And / or, the relationship between the protrusion height L2 of the separator and the height L4 of the second separator member satisfies: L2 ≤ L4.

[0012] Preferably: the first groove is used for installing the first current collector plate; the first current collector plate includes a tab connection section and a cover connection section connected to each other; the tab connection section is disposed inside the first groove; the cover connection section includes a limiting section and a bending section connected to each other; one end of the limiting section is connected to the tab connection section; one end of the limiting section passes through the guiding channel, and one end of the limiting section is connected to the tab connection section; the bending section is bent towards the second groove.

[0013] Preferably: the relationship between the bending length L1 of the bending section and the protrusion height L2 of the separator satisfies: L1 ≤ L2;

[0014] And / or, the relationship between the bending length L1 of the bending section and the distance between the separator and the second separator member of at least L3 satisfies: L1 ≤ L3.

[0015] Preferably: the insulating body is provided with a through hole; the through hole communicates with the first groove and penetrates the insulating body.

[0016] The present utility model also discloses a battery, including a battery cell body, a second current collector plate, a bottom insulating sheet, a housing, a cover plate, and the insulating structure of the above battery cell; first tab foil areas and second tab foil areas are oppositely provided at both ends of the battery cell body; the metal foil in the first tab foil area is connected to the bottom of the first current collector plate; the metal foil in the second tab foil area is connected to the upper surface of the second current collector plate; the bottom of the second current collector plate is connected to the upper surface of the bottom insulating sheet; the bottom of the bottom insulating sheet is connected to the housing; the cover plate is disposed on the upper surface of the insulating body and connected to the housing.

[0017] The present utility model also discloses an electrical device, including the above battery.

[0018] The beneficial effects of the present utility model are that, in this technical solution, the guiding channel of the separator is adopted to enable the current collector plate of the battery to pass through, so as to achieve the convenience of assembly, and it can effectively prevent the passing part of the current collector plate from returning too easily, thereby effectively preventing the current collector plate assembled with other components from contacting the battery cell in the first groove, resulting in phenomena such as battery cell short circuit, and further improving the stability and safety of battery use; at the same time, the separation effect of the first separator member bent towards the inner side of the insulating body is also used to realize the contact between the components inside the first groove and the components outside, thereby avoiding phenomena such as short circuit; and further improving the stability and safety of battery use. Brief Description of the Drawings

[0019] The following will describe the features, advantages, and technical effects of the exemplary embodiments of the present utility model with reference to the attached Figures 1 to 4 drawings.

[0020] Figure 1 is a schematic structural view of the insulation structure of the battery cell according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic assembly structural view between the insulation structure of the battery cell and the current collector plate according to an embodiment of the present utility model;

[0022] Figure 3 is a top view of the insulation structure of the battery cell according to an embodiment of the present utility model;

[0023] Figure 4 is a schematic structural view of the battery according to an embodiment of the present utility model.

[0024] In the figure: 1 - insulation main body; 11 - first groove; 12 - second groove; 2 - first partition member; 3 - through hole; 31 - liquid injection hole; 32 - flow hole; 4 - partition body; 41 - guiding channel; 5 - second partition member; 6 - first current collector plate; 61 - tab connection section; 62 - cover connection section; 621 - limiting section; 622 - bending section; 7 - first tab foil area; 8 - battery cell body; 9 - second tab foil area; 10 - second current collector plate; 101 - bottom insulation sheet; 102 - housing; 103 - cover plate. Detailed Embodiments

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above brief description of the drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality" means two or more unless otherwise specifically defined.

[0027] Reference to "embodiments" in this document means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or multiple situations exist alone. Additionally, the character " / " in this document generally indicates that the associated objects before and after are in an "or" relationship.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "linkage", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0030] The following is a further detailed description of the present utility model in conjunction with the attached Figures 1 to 4 but it does not limit the present utility model.

[0031] As Figure 1 shown, in an embodiment of the present utility model, the insulation structure of the battery cell; includes an insulation main body 1, a first partition member 2, and a partition body 4; the first partition member 2 is connected to the side end of the insulation main body 1, and the first partition member 2 is bent around the surface of the insulation main body 1; and a first groove 11 is formed between the first partition member 2 and the insulation main body 1; the partition body 4 is arranged on the insulation main body 1; and a guiding channel 41 is provided inside the partition body 4; one end of the guiding channel 41 is communicated with the first groove 11; the other end of the guiding channel 41 penetrates through the partition body 4 and is arranged.

[0032] The technical solution of the present utility model enables the current collector plate of the battery to pass through by adopting the guiding channel of the partition body, so as to achieve the convenience of assembly, and can effectively prevent the passing part of the current collector plate from returning too easily, thereby effectively preventing the current collector plate assembled with other components from contacting the battery core in the first groove, resulting in phenomena such as short circuit of the battery core, and further improving the stability and safety of battery use; at the same time, it also realizes the contact between the components inside the first groove and the components outside through the partitioning effect of the first partition member bent towards the inner side of the insulating body, thereby avoiding phenomena such as short circuit; and further improving the stability and safety of battery use.

[0033] Among them, in some embodiments, the insulating body 1 is a cylindrical insulating plate or insulating block, and its diameter is 20.25 - 20.75 mm. The corresponding shape of the insulating body 1 is beneficial to its mutual fitting with the battery core body, thereby improving the automation production efficiency. Further, the insulating body 1 is made of insulating materials such as polypropylene, mica plate asbestos, polyimide, etc.; the first partition member 2 is made of insulating materials such as polypropylene, mica plate asbestos, polyimide, etc.

[0034] Specifically, in some of these embodiments, as Figure 1 and 2 shown, the partition body 4 is arranged to protrude outward from the surface of the insulating body 1, where the outward direction is the upper surface (of the insulating body 1) opposite to the first groove 21, and the protruding direction is from bottom to top. That is to say, the partition body 4 can be a boss or a bump, etc.; the protruding direction of the partition body 4 is outward to prevent the passing part of the current collector plate from returning too easily to the first groove 11, thereby reducing the contact between the passing part of the current collector plate and the battery core structure in the first groove 11 and causing phenomena such as short circuit, and further improving the safety and stability of use. In other embodiments (not shown in the figure), the partition body 4 is arranged to protrude inward from the surface of the insulating body 1. That is to say, the protruding direction of the partition body 4 is inward to achieve a certain assembly gap between the current collector plate and the inner side of the insulating body 1; if the passing part of the current collector plate extends into the first groove 11 after being bent, the assembly gap can prevent the passing part of the current collector plate from contacting the battery core structure in the first groove 11 and causing phenomena such as short circuit, and further improving the safety and stability of use. Of course, the way that the partition body 4 is arranged to protrude outward from the surface of the insulating body 1 is a better solution.

[0035] Specifically, in some embodiments, as Figure 1 and 3As shown, the first partition component 2 can be a (ring-shaped or arc-shaped) partition plate; the first partition component 2 is fixedly formed integrally with the insulating body 1; and the first partition component 2 is arranged along the side end surface of the insulating body 1 (the side end surface of the insulating body 1 can be the left and right front and back side end surfaces or the contact surface of the side end in the circumferential direction), and is bent toward the inner side of the insulating body 1. This structure can effectively ensure the stability of the overall structure and the convenience of processing by the first partition component 2 and the insulating body 1 that are fixedly formed integrally; and the first partition component 2 is arranged along the side end surface of the insulating body 1 to fully surround the side end of the first groove 11, thereby avoiding the internal structure and the external structure from contacting each other to cause short circuits, etc.; thereby improving the stability and safety of battery use. Among them, as Figure 2 As shown, the thickness of the first partition member 2 is D, and the value range of D is 0.05-0.3 mm. This mechanism can effectively ensure the width dimension of the whole formed by the assembly between the insulation structure and the battery core, and improve the structural compactness of the battery; ensure its electrical performance and structural stability.

[0036] Specifically, in some embodiments, such as Figure 1 and 2 As shown, the insulating structure of the battery cell also includes a second partition component 5; the second partition component 5 is connected to the side end of the insulating body 1 (the side end may be the left and right front and back side end faces or the side end in the circumferential direction), and is bent toward the insulating body 1; and a second groove 12 is provided between the second partition component 5 and the insulating body 1; the second groove 12 is provided on the insulating body corresponding to the first groove 11 (further, the second groove 12 is provided on the upper and lower sides of the insulating body corresponding to the first groove 11). Among them, the second partition component 5 may be a (ring-shaped or arc-shaped) partition sheet; the second partition component 5 is integrally fixed with the insulating body 1, and the second partition component 5 is an insulating material such as polypropylene, mica board asbestos, polyimide, etc. This structure can effectively ensure the stability of the overall structure and ensure the convenience of processing by the integrally fixed second partition component 5 and the insulating body 1. Further, as Figure 2 and 3 As shown, the second partition member 5 is disposed around the side end surface of the insulating body 1 and is bent toward the inner side of the insulating body 1. In this structure, the second partition member 5 is disposed around the side end surface of the insulating body 1, so that the inner side end of the second groove 12 can be fully surrounded, thereby preventing the structure inside the second groove 12 (such as the collector plate) from contacting with the external structure (such as the shell) to cause a short circuit, etc., thereby improving the stability and safety of the battery.

[0037] Specifically, in some embodiments, Figure 2As shown, a through hole 3 is provided on the insulating body 1; both ends of the through hole 3 are respectively communicated with the first groove 11 and the second groove 12. Among them, as Figure 2 and 3 shown, the through hole 3 includes a liquid injection hole 31 and at least one flow hole 32; the liquid injection hole 31 penetrates through the insulating body 1 and is respectively communicated with the first groove 11 and the second groove 12; the flow hole 32 penetrates through the insulating body 1 and is respectively communicated with the first groove 11 and the second groove 12. Further, the liquid injection hole 31 is located in the middle of the insulating body 1; the flow holes 32 are arranged around the side of the liquid injection hole 31. This structure realizes a hollow center through the flow holes 32 of the insulating body 1, so as to better ensure the infiltration effect of the electrolyte; and the liquid guiding function of the liquid injection hole 31 can improve the liquid injection efficiency and the operation efficiency.

[0038] Specifically, in some embodiments, as Figure 2 shown, the first groove 11 is used to install the first current collector plate 6; the first current collector plate 6 includes a tab connection section 61 and a cover connection section 62 connected to each other; the tab connection section 61 is arranged inside the first groove 11; one end of the cover connection section 62 passes through the guiding channel 41 and is bent towards the outer surface of the insulating body 1; and one end of the cover connection section 62 is used for welding with the inner top of the battery. Among them, the cover connection section 62 includes a limiting section 621 and a bending section 622 connected to each other; one end of the limiting section 621 is connected to the tab connection section 61; one end of the bending section 622 is bent towards the second groove 12. That is to say, by connecting the cover connection section 62 of the first current collector plate 6 with the cover, while protecting the flattened area foil from contacting the shell, the first current collector plate 6 can be better fixed inside the separator 4, and when being bent downward from the outside, it will not be inserted backward into contact with the battery core in the first groove 11, avoiding causing a short circuit of the battery, and at the same time, the electrolyte infiltration is easier; and it can also reduce the process of winding a piece of adhesive tape, improving the processing efficiency.

[0039] Specifically, in some embodiments, as Figure 2 shown, the relationship between the bending length L1 of the bending section 622 and the protruding height L2 of the separator 4 satisfies: L1 ≤ L2. The bending section 622 with a certain length can ensure the assembly convenience and stability between it and the inner top of the battery, and by making the bending length of the bending section 622 less than or equal to the protruding height L2 of the separator 4, it can effectively prevent the bending of the bending section 622 from entering the first groove 11, thus avoiding the bending section 622 from contacting the components inside the first groove 11 and causing short circuits and other phenomena, and further improving the stability and safety of use.

[0040] Specifically, in some embodiments, as Figure 2As shown, the relationship between the bending length L1 of the bending section 622 and the shortest distance L3 between the separator 4 and the second separator component 5 satisfies: L1 ≤ L3; by making the bending length of the bending section 622 less than or equal to the shortest distance L3 between the separator 4 and the second separator component 5, it is possible to effectively prevent the bending section 622 from bending towards the side end and passing through the second separator component 5, thereby avoiding phenomena such as short circuits caused by the contact between the bending section 622 and the housing, and further improving the stability and safety of battery use.

[0041] Specifically, in some embodiments, as Figure 2 shown, the protruding height L2 of the separator 4; the value range of L2 is: 1 mm ≤ L2 ≤ 5 mm; and the relationship between the protruding height L2 of the separator 4 and the height L4 of the second separator component 5 satisfies: L2 ≤ L4. That is to say, the cover body can be better assembled on the second groove 12 through the relatively high second separator component 5, and a sealed assembly is achieved in combination with the second separator component 5.

[0042] The present utility model also proposes a battery, which includes an insulating structure of the battery cell. The specific structure of the insulating structure of the battery cell refers to the above embodiments. Since this battery adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, as Figure 4 shown, the battery further includes a first current collector plate 6, a battery cell body 8, a second current collector plate 10, a bottom insulating sheet 101, a housing 102, and a cover plate 103; first ear foil regions 7 and second ear foil regions 9 are provided on opposite sides of the battery cell body 8; the metal foil in the first ear foil region 7 is welded to the bottom of the first current collector plate 6; the metal foil in the second ear foil region 9 is welded to the upper surface of the second current collector plate 10; the bottom of the second current collector plate 10 is connected to the upper surface of the bottom insulating sheet 101; the bottom of the bottom insulating sheet 101 is connected to the inner top of the housing 102; the cover plate 103 is disposed on the upper surface of the insulating main body 1 and is connected to the top of the housing 102. Among them, the first current collector plate 6 is a positive current collector plate; the second ear foil region 9 is a negative current collector plate.

[0043] That is to say, after the ear in the first ear foil region 7 is welded to the positive current collector plate and then passes through the separator 4, there is no need for a glue coating process; the insulating main body 1 plays a role in preventing the flattened foil in the first ear foil region 7 from contacting the housing 102, and at the same time it can also prevent the reverse insertion of the positive current collector plate.

[0044] The present utility model further provides an electrical equipment, which includes a battery. The specific structure of the battery refers to the above-mentioned embodiments. Since this electrical equipment adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one herein.

[0045] Among them, the electrical equipment can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, a planer, etc. The embodiments of the present application do not impose special restrictions on the above-mentioned electrical equipment.

[0046] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0047] According to the disclosure and teachings of the above specification, those skilled in the art of the present utility model can also make changes and modifications to the above-mentioned embodiments. Therefore, the present utility model is not limited to the above specific embodiments. Any obvious improvements, substitutions or variations made by those skilled in the art based on the present utility model fall within the protection scope of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims

1. An insulation structure of a battery cell, characterized in that: It includes an insulating body, a first partition component and a separator; the first partition component is connected to the insulating body; and the first partition component is bent around the surface of the insulating body; and a first groove is formed between the first partition component and the insulating body; the separator is arranged on the insulating body; and a guide channel is arranged in the separator; one end of the guide channel is connected to the first groove.

2. The insulation structure of the battery cell according to claim 1, characterized in that: The separator is arranged to protrude outward from the surface of the insulating body; and the separator and the first separating component are respectively arranged on the insulating body opposite to each other; And / or, the first partition component is disposed around the side end surface of the insulating body.

3. The insulation structure of the battery cell according to claim 1, characterized in that: The insulation structure of the battery cell also includes a second partition component; the second partition component is connected to the side end of the insulating body and is bent toward the insulating body; and a second groove is provided between the second partition component and the insulating body; the second groove and the first groove are provided in the upper and lower directions of the insulating body corresponding to each other.

4. The insulation structure of the battery cell according to claim 3, characterized in that: The second partition component is disposed around the side end surface of the insulating body.

5. The insulation structure of the battery cell according to claim 3 or 4, characterized in that: The protrusion height L2 of the separator is in the range of 1 mm ≤ L2 ≤ 5 mm. And / or, a relationship between a protruding height L2 of the separator and a height L4 of the second partition member satisfies: L2≤L4.

6. The insulation structure of the battery cell according to claim 3 or 4, characterized in that: The first groove is used to install the first current collecting plate; the first current collecting plate includes a pole ear connecting section and a cover connecting section that are connected to each other; the pole ear connecting section is arranged inside the first groove; the cover connecting section includes a limiting segment and a bending segment that are connected to each other; one end of the limiting segment is connected to the pole ear connecting section; one end of the limiting segment passes through the guide channel, and one end of the limiting segment is connected to the pole ear connecting section; the bending segment is bent toward the second groove.

7. The insulation structure of the battery cell according to claim 6, characterized in that: The relationship between the bending length L1 of the bending segment and the protruding height L2 of the separator satisfies: L1≤L2; And / or, the relationship between the bending length L1 of the bending segment and the distance between the separator and the second partition member being at least L3 satisfies: L1≤L3.

8. The insulation structure of the battery cell according to claim 1, characterized in that: The insulating body is provided with at least one through hole; the through hole is communicated with the first groove and passes through the insulating body.

9. A battery, characterized in that: The invention comprises a battery cell body, a second current collecting disk, a bottom insulating sheet, a shell and a cover plate, and an insulating structure of the battery cell according to any one of claims 1 to 8; the two side ends of the battery cell body are oppositely provided with a first pole tab foil area and a second pole tab foil area; the metal foil in the first pole tab foil area is connected to the bottom of the first current collecting disk; the metal foil in the second pole tab foil area is connected to the upper surface of the second current collecting disk; The bottom of the second current collecting plate is connected to the upper surface of the bottom insulating sheet; the bottom of the bottom insulating sheet is connected to the shell; the cover plate is arranged on the upper surface of the insulating body and connected to the shell.

10. An electrical equipment, characterized in that: A battery comprising the battery of claim 9.

Images