Shell assembly of battery, battery and electric equipment

Abstract

The utility model provides a shell assembly of a battery, the battery and electric equipment. The shell assembly of the battery comprises a first shell, a second shell, an insulator, a first cover plate and a second cover plate, the first shell and the second shell are each provided with an open end, and the second shell and the first shell are spaced in the axial direction of the shell assembly. The insulator is arranged between the first shell and the second shell, two ends of the insulator are respectively connected to the first shell and the second shell, and the first shell, the insulator and the second shell define a cavity for accommodating a core body of the battery. The first cover plate is connected to the end part, far away from the insulator, of the first shell so as to seal the first shell, and the first cover plate is used for being connected to a core body of the battery so as to form a positive electrode of the battery. The second cover plate is connected to the end part, far away from the insulator, of the second shell so as to seal the second shell, and the second cover plate is used for being connected to a core body of the battery so as to form a negative electrode of the battery. The shell assembly has the advantages of being simple in structure and easy to machine.

Description

Technical Field

[0001] The utility model generally relates to the technical field of batteries, and more specifically to a battery housing component, a battery and an electrical device. Background Art

[0002] At present, most cylindrical batteries generally adopt a cover plate riveted pole structure. The riveted pole structure must take into account the electrolyte sealing in the battery cell and the insulation of the positive and negative electrodes of the battery. It is necessary to strictly control the size of each part to control the compression of the sealing ring. Overpressure will affect the life of the sealing ring, and insufficient compression will make it difficult to ensure airtightness, and the battery is at risk of leakage. Therefore, the cover plate structure of existing cylindrical batteries is relatively complex, with many parts and many welding processes. At the same time, the shell of the cylindrical battery is mainly made by stamping and drawing or rolling welding and then cutting. During stamping and drawing, the wall thickness of the shell is required to be not less than 0.3mm, and the drawing height is limited; while rolling welding is relatively simple, but the total cost of comprehensive cover plate riveting is still relatively high. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above problems, the utility model provides a battery housing assembly in a first aspect, wherein the battery housing assembly comprises:

[0005] a first shell;

[0006] a second shell, wherein the first shell and the second shell both have an open end, and the second shell is spaced apart from the first shell in an axial direction of the shell assembly;

[0007] an insulator, wherein the insulator is disposed between the first shell and the second shell along the axial direction, and both ends of the insulator are connected to the first shell and the second shell respectively, and the first shell, the insulator and the second shell define a chamber for accommodating the core of the battery;

[0008] a first cover plate connected to an end of the first shell away from the insulator to close the first shell, the first cover plate being used to be connected to the core of the battery to form a positive electrode of the battery; and

[0009] A second cover plate is connected to an end of the second shell away from the insulator to close the second shell, and the second cover plate is used to be connected to the core of the battery to form a negative electrode of the battery.

[0010] According to the battery shell assembly of the first aspect of the utility model, the first shell and the first cover plate as a whole serve as the positive electrode of the battery, the second shell and the second cover plate as a whole serve as the negative electrode of the battery, and the insulator serves as insulation between the positive and negative electrodes of the battery, thereby greatly simplifying the end structure of the battery, simplifying the welding process of the battery shell assembly, and reducing the difficulty of processing and assembling the battery.

[0011] Optionally, a first plug-in slot is provided at the first end of the insulator, and a second plug-in slot is provided at the second end of the insulator; the first shell is plugged into the first plug-in slot, and the first shell is fixed to the insulator; the second shell is plugged into the second plug-in slot, and the second shell is fixed to the insulator.

[0012] Optionally, along the axial direction, the first plug-in slot is spaced apart from the second plug-in slot.

[0013] Optionally, along a radial direction perpendicular to the axial direction, an inner wall of the first plug-in slot at least partially protrudes and is embedded in the first shell, and an inner wall of the second plug-in slot at least partially protrudes and is embedded in the second shell; and / or

[0014] Along a radial direction perpendicular to the axial direction, the first shell at least partially protrudes from and is embedded in an inner wall of the first plug-in slot, and the second shell at least partially protrudes from and is embedded in an inner wall of the second plug-in slot.

[0015] Optionally, a first engaging tooth is disposed in the first plugging slot, and the first engaging tooth abuts against the first shell; and a second engaging tooth is disposed in the second plugging slot, and the second engaging tooth abuts against the second shell.

[0016] Optionally, the first shell is provided with a first groove, and the first groove corresponds to the first engaging tooth, so that the first shell is engaged and connected with the insulator; and / or

[0017] The second shell is provided with a second groove, and the second groove corresponds to the second engaging teeth so that the second shell is engaged and connected with the insulator.

[0018] Optionally, the first meshing teeth are arranged along a circumferential direction perpendicular to the axial direction; and / or

[0019] The second meshing teeth are arranged along a circumferential direction perpendicular to the axial direction.

[0020] Optionally, the insulator is an injection-molded part, and the insulator, the first shell and the second shell are integrally formed.

[0021] Optionally, two current collecting plates are further included, the two current collecting plates are respectively connected to the first cover plate and the second cover plate, and the two current collecting plates are used to be connected to the core body.

[0022] Optionally, the current collecting disc comprises a disc body and pins, the disc body is connected to the first cover plate or the second cover plate, the pins protrude from the disc body along the axial direction, and the pins are used to be connected to the core body.

[0023] A second aspect of the utility model provides a battery, comprising:

[0024] The battery housing assembly according to the above; and

[0025] A core body is disposed in the chamber and connected to the first cover plate and the second cover plate.

[0026] The battery according to the second aspect of the utility model has a simple structure, light weight, and is easy to process and assemble, thereby reducing costs and having stable performance.

[0027] A third aspect of the utility model provides an electrical device, comprising the battery described above.

[0028] According to the electrical equipment of the third aspect of the utility model, the battery used has a simple structure, low manufacturing cost and stable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0030] Figure 1 A three-dimensional schematic diagram of a battery according to a preferred embodiment of the present utility model;

[0031] Figure 2 for Figure 1 An exploded view of the battery in the axial direction;

[0032] Figure 3 For along Figure 1 Schematic diagram of the cross section taken along the midline AA;

[0033] Figure 4 for Figure 3 An enlarged schematic diagram of part B in FIG.

[0034] Figure 5 A diagram of the assembly steps of a battery according to a preferred embodiment of the utility model;

[0035] Figure 6 It is a schematic diagram of the structure of the first shell and the second shell after stamping;

[0036] Figure 7 A schematic diagram of the injection molding process of the insulator; and

[0037] Figure 8 It is a schematic diagram of the rolling process of the first shell and the second shell.

[0038] Description of Reference Numerals

[0039] 100: first housing 101: first groove

[0040] 110: second housing 111: second groove

[0041] 120: Insulator 121: First plug slot

[0042] 122: second plug-in slot 123: first engaging tooth

[0043] 124: second meshing tooth 130: first cover plate

[0044] 140: Second cover plate 131: Connecting boss

[0045] 141: Liquid injection hole 142: Explosion-proof valve

[0046] 150: Collecting plate 151: Plate body

[0047] 152: Pin 160: Core

[0048] D1: Axial direction D2: Radial direction

[0049] D3: circumferential direction DETAILED DESCRIPTION

[0050] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0051] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0052] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0053] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0054] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0055] Figures 1 to 8 A battery shell assembly according to the utility model is shown, and the battery shell assembly includes a first shell 100, a second shell 110, an insulator 120, a first cover plate 130 and a second cover plate 140. The second shell 110 and the first shell 100 both have open ends, and the second shell 110 and the first shell 100 are spaced apart along the axial direction D1 of the shell assembly. Along the axial direction D1, the insulator 120 is arranged between the first shell 100 and the second shell 110, and the two ends of the insulator 120 are respectively connected to the first shell 100 and the second shell 110, and the first shell 100, the insulator 120, and the second shell 110 define a chamber for accommodating the core 160 of the battery. The first cover plate 130 is connected to the end of the first shell 100 away from the insulator 120 to close the first shell 100. The first cover plate 130 is used to be connected to the core 160 of the battery to form the positive electrode of the battery. The second cap plate 140 is connected to the end of the second housing 110 away from the insulator 120 to close the second housing 110. The second cap plate 140 is used to be connected to the core 160 of the battery to form a negative electrode of the battery.

[0056] According to the battery shell assembly of the utility model, the first shell 100 and the first cover plate 130 as a whole serve as the positive electrode of the battery, the second shell 110 and the second cover plate 140 as a whole serve as the negative electrode of the battery, and the insulator 120 serves as insulation between the positive and negative electrodes of the battery, thereby greatly simplifying the end structure of the battery, simplifying the welding process of the battery shell assembly, and reducing the difficulty of processing and assembling the battery.

[0057] Optionally, the battery of this specific embodiment takes a cylindrical battery as an example, but the battery according to the utility model is not limited to a cylindrical battery, but may also be a rectangular battery, etc. In addition, the cross-section of the battery according to the utility model perpendicular to the axial direction D1 may also be an elliptical, polygonal, etc., all within the protection scope of the utility model.

[0058] Further, see Figure 2 According to the battery shell assembly of the utility model, the two current collecting plates 150 are further included. The two current collecting plates 150 are respectively connected to the first cover plate 130 and the second cover plate 140, and the two current collecting plates 150 are used to connect to the core 160 of the battery. Specifically, the core 160 is made of a positive electrode sheet, a negative electrode sheet and a diaphragm through a winding process. The two ends of the core 160 respectively have a positive electrode ear and a negative electrode ear. The two ends of the core 160 respectively realize the flattening operation of the positive electrode ear and the negative electrode ear through a flattening process, and the positive electrode ear and the negative electrode ear are respectively connected to the two current collecting plates 150. The first cover plate 130 and the second cover plate 140 are electrically connected to the core 160 through the current collecting plate 150. The setting of the current collecting plate 150 can support the core 160 in the battery. In addition, the petal-shaped current collecting plate 150 can be used to elastically support and damp the core 160 to prevent damage to the core 160 when the battery moves as a whole.

[0059] For details, refer to Figure 2 The current collecting disk 150 includes a disk body 151 and a pin 152. The disk body 151 is connected to the first cover plate 130 or the second cover plate 140. The pin 152 protrudes from the disk body 151 along the axial direction D1, and the pin 152 is used to connect to the core body 160. The core body 160 (positive electrode ear or negative electrode ear) is connected to the pin 152 to form a support for the core body 160, and the core body 160 has elasticity relative to the first cover plate 130 or the second cover plate 140, which is conducive to preventing the core body 160 from being damaged.

[0060] Optionally, the first cover plate 130 and the disc body 151 of the current collecting disc 150 , and the pins 152 of the current collecting disc 150 and the core body 160 are connected by welding.

[0061] Further, see Figure 3 and Figure 4, the first end of the insulator 120 is provided with a first insertion slot 121, and the second end of the insulator 120 is provided with a second insertion slot 122. The first shell 100 is inserted into the first insertion slot 121, and the first shell 100 is fixed to the insulator 120. The second shell 110 is inserted into the second insertion slot 122, and the second shell 110 is fixed to the insulator 120. The provision of the insulator 120 strengthens the connection strength of the first shell 100 and the second shell 110, making the shell assembly of the battery more stable. Optionally, along the axial direction D1, the first insertion slot 121 is spaced from the second insertion slot 122, so that the first shell 100 and the second shell 110 are spaced from each other along the axial direction D1, so that the positive and negative electrodes of the battery have sufficient insulation withstand voltage performance, and the strength of the insulator 120 can also be enhanced, and at the same time, the first shell 100 and the second shell 110 can be supported, and the displacement of the first shell 100 and the second shell 110 along the axial direction D1 can be limited.

[0062] Reference Figure 4 , along the radial direction D2 perpendicular to the axial direction D1, the inner wall of the first plugging slot 121 at least partially protrudes and is embedded in the first housing 100, and the inner wall of the second plugging slot 122 at least partially protrudes and is embedded in the second housing 110. Along the radial direction D2 perpendicular to the axial direction D1, the first housing 100 at least partially protrudes and is embedded in the inner wall of the first plugging slot 121, and the second housing 110 at least partially protrudes and is embedded in the inner wall of the second plugging slot 122. Through the above arrangement, a bite structure is formed between the first housing 100 and the insulator 120, and a bite structure is also formed between the second housing 110 and the insulator 120, so that there is a limit between the first housing 100 and the insulator 120 along the circumferential direction D3, and there is a limit between the second housing 110 and the insulator 120 along the circumferential direction D3, which further strengthens the connection strength between the insulator 120 and the first housing 100 and the second housing 110 respectively.

[0063] For details, refer to Figure 4 , a first engaging tooth 123 is provided in the first plugging slot 121, and the first engaging tooth 123 abuts against the first shell 100. The first shell 100 is provided with a first groove 101, and the first groove 101 corresponds to the first engaging tooth 123, so that the first shell 100 is engaged with the insulator 120. Correspondingly, the inner wall of the first plugging slot 121 fits with the side wall of the first shell 100, and the first groove 101 can be formed by stamping, so that the side wall of the first shell 100 protrudes into the side wall of the first plugging slot 121, so that the first shell 100 and the insulator 120 are engaged with each other, further strengthening the connection strength between the first shell 100 and the insulator 120.

[0064] Similarly, a second engaging tooth 124 is provided in the second plug-in slot 122, and the second engaging tooth 124 abuts against the second shell 110. The second shell 110 is provided with a second groove 111, and the second groove 111 corresponds to the second engaging tooth 124, so that the second shell 110 is engaged and connected with the insulator 120. Correspondingly, the inner wall of the second plug-in slot 122 fits with the side wall of the second shell 110, and the second groove 111 can be formed by stamping, so that the side wall of the second shell 110 protrudes into the side wall of the second plug-in slot 122, so that the second shell 110 and the insulator 120 are engaged with each other, further strengthening the connection strength between the second shell 110 and the insulator 120.

[0065] Further, combined with Figure 6 and Figure 7 As shown, the first engaging teeth 123 of the insulator 120 are arranged along the circumferential direction D3, and correspondingly, the first housing 100 has a plurality of first grooves 101 arranged along the circumferential direction D3, so that the connection strength between each part of the first housing 100 along the circumferential direction D3 and the insulator 120 is more uniform. Similarly, the second engaging teeth 124 of the insulator 120 are arranged along the circumferential direction D3, and correspondingly, the second housing 110 has a plurality of second grooves 111 arranged along the circumferential direction D3, so that the connection strength between each part of the second housing 110 along the circumferential direction D3 and the insulator 120 is more uniform.

[0066] Optionally, the insulator 120 is an injection-molded part, and the insulator 120 is integrally formed with the first shell 100 and the second shell 110 , so the structure is stable and easy to process.

[0067] The first shell 100 and the second shell 110 can be made of aluminum alloy, stainless steel, cold-rolled carbon steel plate, etc. The insulator 120 can be made of PP (polypropylene), PBT (polybutylene terephthalate) or other modified insulating materials to meet the requirements of strength and electrolyte resistance.

[0068] Optionally, refer to Figure 2 The first cover plate 130 and the second cover plate 140 are both provided with a connecting boss 131 for discharging the battery. The first cover plate 130 and the second cover plate 140 may also integrate an explosion-proof valve 142 and a liquid injection hole 141, such as Figure 2 As shown, the second cover plate 140 is provided with an explosion-proof valve 142 and a liquid injection hole 141, which occupies a small space and has a compact structure.

[0069] The above is the structure of the battery shell assembly according to the utility model. The utility model also provides a battery, including the battery shell assembly according to the above and a core 160, the core 160 is arranged in the chamber, and the core 160 is connected to the first cover plate 130 and the second cover plate 140. The battery according to the utility model has a simple structure, light weight, and is easy to process and assemble, thereby reducing costs and having stable performance.

[0070] Figure 5 The assembly steps of the battery according to the utility model are shown in FIG. Figures 6 to 8 As shown, the assembly steps of the above-mentioned battery include:

[0071] S1. Punch out grooves from the sheet materials of the first shell 100 and the second shell 110. Specifically, refer to Figure 6 , a first groove 101 is punched out on the bottom edge of the sheet material of the first shell 100 , and a second groove 111 is punched out on the top edge of the sheet material of the second shell 110 ;

[0072] S2, insert the first shell 100 and the second shell 110, and injection mold the insulator 120. Specifically, the first shell 100 and the second shell 110 are inserted after T treatment. At this time, the raw materials of the first shell 100 and the second shell 110 are strips, which makes it easier to achieve the T treatment of the first shell 100 and the second shell 110 through an assembly line. Figure 7 , placing the sheet material of the first shell 100 and the sheet material of the second shell 110 into an injection mold, and then injection molding the insulator 120, so that the first shell 100 and the second shell 110 are connected together through the insulator 120;

[0073] S3, rolling the first shell 100 and the second shell 110, specifically, refer to Figure 8 , rolling the first shell 100 and the second shell 110 into a cylindrical shape;

[0074] S4, welding the interface between the first shell 100 and the second shell 110;

[0075] S5, welding the collecting plate 150 to the first cover plate 130 and the second cover plate 140 respectively;

[0076] S6, welding the collecting plate 150 and the core body 160;

[0077] S7 . Install the core 160 into the first shell 100 and the second shell 110 , weld the first cover plate 130 to the first shell 100 , and weld the second cover plate 140 to the second shell 110 .

[0078] Through the above-mentioned battery assembly steps, the battery according to the utility model can be processed simply and effectively, with low processing difficulty and high assembly efficiency.

[0079] The utility model also provides an electric device, comprising the battery according to the above. According to the electric device of the utility model, the battery used has a simple structure, low manufacturing cost and stable performance.

[0080] Optionally, the above-mentioned electrical equipment may include vehicles, industrial equipment, energy storage equipment, environmental protection equipment, etc., all of which should be within the protection scope of the present utility model.

[0081] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0082] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A battery housing assembly, characterized in that: The battery housing assembly comprises: a first shell; a second shell, wherein the first shell and the second shell both have an open end, and the second shell is spaced apart from the first shell in an axial direction of the shell assembly; an insulator, wherein the insulator is disposed between the first shell and the second shell along the axial direction, and both ends of the insulator are connected to the first shell and the second shell respectively, and the first shell, the insulator and the second shell define a chamber for accommodating the core of the battery; a first cover plate connected to an end of the first shell away from the insulator to close the first shell, the first cover plate being used to be connected to the core of the battery to form a positive electrode of the battery; and A second cover plate is connected to an end of the second shell away from the insulator to close the second shell, and the second cover plate is used to be connected to the core of the battery to form a negative electrode of the battery.

2. The battery housing assembly according to claim 1, characterized in that: The first end of the insulator is provided with a first plug-in slot, and the second end of the insulator is provided with a second plug-in slot; the first shell is plugged into the first plug-in slot, and the first shell is fixed to the insulator; the second shell is plugged into the second plug-in slot, and the second shell is fixed to the insulator.

3. The battery housing assembly according to claim 2, characterized in that: Along the axial direction, the first inserting groove is spaced apart from the second inserting groove.

4. The battery housing assembly according to claim 2, characterized in that: Along a radial direction perpendicular to the axial direction, an inner wall of the first plug-in slot at least partially protrudes and is embedded in the first shell, and an inner wall of the second plug-in slot at least partially protrudes and is embedded in the second shell; and / or Along a radial direction perpendicular to the axial direction, the first shell at least partially protrudes from and is embedded in an inner wall of the first plug-in slot, and the second shell at least partially protrudes from and is embedded in an inner wall of the second plug-in slot.

5. The battery housing assembly according to claim 2, characterized in that: A first engaging tooth is disposed in the first plugging slot, and the first engaging tooth abuts against the first shell; a second engaging tooth is disposed in the second plugging slot, and the second engaging tooth abuts against the second shell.

6. The battery housing assembly according to claim 5, characterized in that: The first housing is provided with a first groove, and the first groove corresponds to the first engaging tooth, so that the first housing is engaged and connected with the insulator; and / or The second shell is provided with a second groove, and the second groove corresponds to the second engaging teeth so that the second shell is engaged and connected with the insulator.

7. The battery housing assembly according to claim 5, characterized in that: The first meshing teeth are arranged along a circumferential direction perpendicular to the axial direction; and / or The second meshing teeth are arranged along a circumferential direction perpendicular to the axial direction.

8. The battery housing assembly according to claim 1, characterized in that: The insulator is an injection molded part, and the insulator, the first shell and the second shell are integrally formed.

9. The battery housing assembly according to claim 1, characterized in that: It also includes two current collecting plates, which are respectively connected to the first cover plate and the second cover plate, and are used to be connected to the core.

10. The battery housing assembly according to claim 9, characterized in that: The current collecting disk includes a disk body and pins, the disk body is connected to the first cover plate or the second cover plate, the pins protrude from the disk body along the axial direction, and the pins are used to be connected to the core body.

11. A battery, characterized in that: include: The housing assembly of a battery according to any one of claims 1 to 10; as well as A core body is disposed in the chamber and connected to the first cover plate and the second cover plate.

12. An electrical equipment, characterized in that: Comprising a battery according to claim 11.

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