Battery housing and battery

Abstract

This utility model relates to the field of battery technology, and more particularly to a battery housing and a battery. The battery housing includes a main housing, a bending member, and cable ties. The bending member includes at least a first plate, a second plate, and a third plate connected in sequence, with bends formed between the first and second plates, and between the second and third plates. The first plate is fitted and fixed to the inner wall of the main housing, while the third plate is away from the inner wall of the main housing and has a fixing hole. The cable ties are installed in the fixing hole. The battery housing described above enables the cable ties to be securely installed within the battery housing, improving the cable ties' vibration resistance. Simultaneously, the cable ties are installed in the battery housing via the bending member, preventing failure due to the high-temperature environment inside the battery housing. The bending portion enhances resistance to thermal deformation and effectively absorbs welding heat deformation, significantly reducing the structural deformation of the inner wall of the main housing, preventing excessive surface deviation of the battery housing, and improving the protection of the battery housing.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery housing and a battery. Background Technology

[0002] Inside the battery box, wiring harnesses are typically secured using adhesive or cable ties. However, due to the heat dissipation of the battery modules during charging and discharging, adhesive bonding can easily fail in the high-temperature environment inside the battery box. Using cable ties, on the other hand, requires directly welding the cable tie base to the inner wall of the battery box. During welding, the battery box is prone to deformation due to localized overheating, leading to excessive surface roughness deviations and affecting its normal operation. Utility Model Content

[0003] The purpose of this utility model is to provide a battery box and battery to achieve a stable installation of cable ties inside the battery box and avoid welding deformation of the battery box.

[0004] To achieve this objective, the technical solution adopted by this utility model is as follows:

[0005] Battery housing, including:

[0006] main box;

[0007] A bending component, comprising at least a first plate, a second plate, and a third plate connected in sequence, wherein bending portions are formed between the first plate and the second plate, and between the second plate and the third plate; the first plate is fitted and fixed to the inner sidewall of the main housing, the third plate is away from the inner sidewall of the main housing, and the third plate has a fixing hole.

[0008] Cable ties, which are installed in the fixing holes.

[0009] As an optional solution for the battery housing, one of the first plate and the inner sidewall of the main housing is provided with a positioning part, and the other is provided with a positioning hole; when the first plate is attached to the inner sidewall of the main housing, the positioning part is limited to passing through the positioning hole.

[0010] As an optional solution for the battery housing, stress holes are provided in the bending portion between the second plate and the third plate.

[0011] As an alternative to the battery housing, the second plate is flipped along both sides of its width to form a first rolled edge, and / or the third plate is flipped along both sides of its width to form a second rolled edge.

[0012] As an optional design for the battery housing, the bending direction between the first plate and the second plate is opposite to the bending direction between the second plate and the third plate; the bending angle β between the first plate and the second plate is 90°<β≤105°, and the bending angle α between the second plate and the third plate is 90°<α≤105°.

[0013] As an optional solution for the battery housing, the outer surface of the bent component is provided with an insulating coating.

[0014] As an optional solution for the battery housing, the fixing hole includes a first hole, and the cable tie includes an elastic seat and a fixing part connected to each other. The elastic seat is engaged with the first hole, and the fixing part is located on the side of the third plate away from the main housing.

[0015] As an alternative to the battery housing, a guide slope is provided circumferentially around the side of the first hole away from the main housing; the guide slope is inclined outward along the axial direction of the first hole.

[0016] As an optional solution for the battery housing, the fixing hole includes a second hole, the cable tie includes an elastic clip and a fixing part connected to each other, the elastic clip is clamped in the second hole, and the fixing part is disposed at the end of the third plate away from the second plate;

[0017] The bottom of the elastic clamp is provided with two opposing clamping plates. The inner sides of the two clamping plates are provided with a first claw and a second claw in sequence along the length direction of the clamping plates. The two opposing first claws are used to clamp the third plate, and the two opposing second claws are used to clamp the inner wall of the second hole.

[0018] The battery, including the battery housing described above.

[0019] The beneficial effects of this utility model are as follows:

[0020] The battery box proposed in this utility model features cable ties installed in the fixing holes of a bent component. The first plate of the bent component is fitted and fixed to the inner wall of the battery box, achieving a stable installation of the cable ties within the battery box and preventing significant positional displacement when the cable ties are subjected to vibration, thus improving the vibration resistance of the cable ties. The cable ties are installed in the battery box via the bent component, eliminating the need for adhesive structures and preventing failure of the cable ties in the high-temperature environment inside the battery box. Because the bent component has at least two bends, it effectively absorbs welding heat deformation, enhancing resistance to thermal deformation, reducing the structural deformation of the inner wall of the main box, preventing excessive surface deviation of the battery box, and improving the protection of the battery box.

[0021] The battery proposed in this utility model includes the aforementioned battery housing, achieving stable installation of cable ties within the battery housing and improving the cable ties' vibration resistance. It eliminates the need for adhesive structures, preventing cable ties from failing in the high-temperature environment inside the battery housing. Because the bending component has at least two bends, it enhances resistance to thermal deformation, reduces the structural deformation of the inner sidewall of the main housing, avoids excessive surface deviation of the battery housing, and improves the protection of the battery housing. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the battery box provided in an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the bent component with cable ties installed according to an embodiment of the present invention;

[0024] Figure 3 This is a front view of the bent part provided in this embodiment of the utility model;

[0025] Figure 4 This is a structural schematic diagram of the bending component provided in this embodiment of the utility model;

[0026] Figure 5 This is a partial structural diagram of a bent component with cable ties installed according to an embodiment of the present invention;

[0027] Figure 6 This is a front view of one of the cable ties provided in this embodiment of the utility model.

[0028] The component names and labels in the diagram are as follows:

[0029] 1. Main body; 11. Positioning hole; 2. Bending part; 21. First plate; 211. Positioning part; 22. Second plate; 221. First rolled edge; 23. Third plate; 231. Second rolled edge; 232. First hole; 2320. Guide slope; 233. Second hole; 24. Bending part; 240. Stress hole; 3. Cable tie; 31. Elastic seat; 32. Elastic clamp; 321. First claw; 322. Second claw; 33. Fixing part. Detailed Implementation

[0030] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] This embodiment proposes a battery, which includes a battery pack and a battery housing. The battery pack is installed in the battery housing and the circuit input and output are realized through wiring harness.

[0036] Inside the battery box, wiring harnesses are typically secured using adhesive or cable ties. However, due to the heat dissipation of the battery modules during charging and discharging, adhesive bonding can easily fail in the high-temperature environment inside the battery box. Using cable ties, on the other hand, requires directly welding the cable tie base to the inner wall of the battery box. During welding, the battery box is prone to deformation due to localized overheating, leading to excessive surface roughness deviations and affecting its normal operation.

[0037] To solve the above problems, such as Figure 1 and Figure 2As shown, this embodiment also proposes a battery box, which includes a main box 1, a bending member 2, and cable ties 3. The bending member 2 includes at least a first plate 21, a second plate 22, and a third plate 23 connected in sequence. Bending portions 24 are formed between the first plate 21 and the second plate 22, and between the second plate 22 and the third plate 23. The first plate 21 is fixed to the inner wall of the main box 1, and the third plate 23 is away from the inner wall of the main box 1. The third plate 23 has a fixing hole. The cable ties 3 are installed in the fixing hole. The cable ties 3 are installed in the fixing hole of the bending member 2, and the first plate 21 of the bending member 2 is fixed to the inner wall of the battery box, which realizes the stable installation of the cable ties 3 in the battery box, avoids large positional displacement of the cable ties 3 when affected by vibration, and improves the vibration resistance of the cable ties 3. The cable ties 3 are installed in the battery box through the bending member 2, without the need for adhesive structure, avoiding failure of the cable ties 3 in the high-temperature environment inside the battery box. Because the bending part 2 has at least two bending portions 24, it effectively absorbs welding heat deformation, enhances the resistance to heat deformation, reduces the amount of structural deformation of the inner wall of the main box 1, avoids excessive surface deviation of the battery box, and improves the protection of the battery box.

[0038] In this embodiment, the bent component 2 is generally Z-shaped, integrally formed by stamping with a first plate 21, a second plate 22, a third plate 23, and two bending portions 24, improving the processing efficiency of the bent component 2. The Z-shaped structure allows for slight deformation of the bent component 2, preventing stress concentration at the welding points due to thermal expansion and contraction when the battery pack temperature inside the battery box changes (e.g., -40℃ to 80℃), thus achieving thermal expansion compensation. The first plate 21 is welded to the inner wall of the main casing 1 to improve the connection strength between the bent component 2 and the main casing 1. Weight-reducing holes (such as circular or honeycomb structures) can also be opened in the bent component 2 to reduce the overall weight of the bent component 2 while ensuring structural strength, thereby meeting the lightweight requirements of the battery. In other embodiments, the bent component 2 can also be S-shaped or multi-stage stepped, improving the buffering capacity of the bent component 2.

[0039] like Figure 3As shown, the bending direction between the first plate 21 and the second plate 22 is opposite to the bending direction between the second plate 22 and the third plate 23. Specifically, taking the first plate 21 as a reference, the second plate 22 bends away from the inner wall of the main housing 1, and taking the second plate 22 as a reference, the third plate 23 bends towards the inner wall of the main housing 1 to form a Z-shaped structure. This creates a gap between the third plate 23 and the inner wall of the main housing 1, facilitating the fixing of the wire harness and preventing the wire harness from directly contacting the main housing 1. The bending angle β between the first plate 21 and the second plate 22 is 90° < β ≤ 105°, and the bending angle α between the second plate 22 and the third plate 23 is 90° < α ≤ 105°. In this embodiment, the bending angle α can be 90°, 95°, 100° or 105°, and the bending angle β can be 90°, 95°, 100° or 105°, so that the bending part 2 has a suitable bending angle to effectively absorb welding heat deformation and avoid local overheating of the main box 1 and structural deformation.

[0040] It should be noted that the first plate 21 and the inner wall of the main housing 1 are connected using a segmented skip welding process, i.e., welding with short weld seams (weld length ≤ 5mm) at intervals to reduce heat input during welding, reduce the area of ​​the heat-affected zone on the inner wall of the main housing 1, and improve welding quality. During welding, the first plate 21 is connected to the inner wall of the main housing 1 by laser deep penetration welding, with a weld seam length ≤ 5mm and an interval of 10mm to 15mm between adjacent weld seams, ensuring welding strength while reducing welding heat input. In other embodiments, when the main housing 1 is a thin-walled housing, a composite welding method of laser and brazing can be used to reduce heat input and prevent deformation of the main housing 1. Alternatively, a cold metal transfer welding process can be used to reduce welding spatter and improve welding accuracy.

[0041] In an optional embodiment, one of the first plate 21 and the inner wall of the main housing 1 is provided with a positioning part 211, and the other is provided with a positioning hole 11. When the first plate 21 is attached to the inner wall of the main housing 1, the positioning part 211 is limited and inserted into the positioning hole 11. Through the cooperation of the positioning part 211 and the positioning hole 11, the pre-positioning of the bent part 2 in the main housing 1 is realized, which facilitates the subsequent welding operation. At the same time, the positioning welding of the bent part 2 in the main housing 1 is realized, which improves the welding accuracy of the bent part 2 and reduces the problems of reduced structural strength and shortened service life caused by welding deviation.

[0042] like Figure 1 and Figure 2As shown, in this embodiment, the first plate 21 is provided with a positioning part 211, and the inner sidewall of the main housing 1 is provided with a positioning hole 11. Positioning parts 211 are integrally provided on both sides of the first plate 21 along its width direction. The positioning parts 211 are generally strip-shaped to facilitate insertion into the corresponding positioning holes 11. The one-to-one insertion and engagement of the two positioning parts 211 with the two positioning holes 11 further improves the stability and welding accuracy of the bent part 2 in the main housing 1. In other embodiments, the first plate 21 is provided with positioning holes 11, and the inner sidewall of the main housing 1 is provided with positioning parts 211. The structure, shape, and number of positioning parts 211 and positioning holes 11 can be flexibly adjusted, only requiring the positioning and welding of the bent part 2 in the main housing 1.

[0043] In an optional embodiment, the bending component 2 is made of 304 stainless steel, which not only ensures the structural strength of the bending component 2 but also facilitates welding the bending component 2 to the main housing 1, improving the corrosion resistance of the bending component 2. In other embodiments, the bending component 2 can also be made of spring steel and shape memory alloys (such as nickel-titanium alloys), giving the bending component 2 elastic recovery capability and adapting to a wider range of thermal deformation. Of course, the bending component 2 can also be made of carbon fiber composite material composed of carbon fiber reinforced plastic and aluminum, to balance the high strength and lightweight of the bending component 2.

[0044] In an optional embodiment, the outer surface of the bent component 2 is provided with an insulating coating. By applying the insulating coating, the bent component 2 acquires both insulation and corrosion resistance, preventing the electrolyte inside the battery pack from corroding the bent component 2. In other embodiments, the outer surface of the bent component 2 may also undergo anodizing or nickel plating treatment to adapt the bent component 2 to humid environments and improve its corrosion resistance.

[0045] like Figure 2 As shown, stress holes 240 are provided in the bending portion 24 between the second plate 22 and the third plate 23. By providing stress holes 240 in the bending portion 24, the deformation of the bent part 2 is concentrated around the stress holes 240, avoiding random cracking of the bent part 2, improving the structural stability of the bent part 2, making it less prone to breakage or other damage during long-term use, and further enhancing the overall safety of the battery box. The bending portion 24 between the second plate 22 and the third plate 23 is punched with stress holes 240 with a diameter of approximately 1.5 mm. The number of stress holes 240 can be flexibly adjusted and is not specifically limited here.

[0046] In an optional embodiment, the second plate 22 is flipped along both sides in the width direction to form a first rolled edge 221, and / or the third plate 23 is flipped along both sides in the width direction to form a second rolled edge 231. Figure 2 and Figure 4As shown, in this embodiment, the second plate 22 has both sides along its width direction flipped to form a first rolled edge 221, and the third plate 23 has both sides along its width direction flipped to form a second rolled edge 231. By forming the first rolled edge 221 and the second rolled edge 231 by rolling them 180°, the sides of the second plate 22 and the third plate 23 are rolled into an arc shape, avoiding scratches to operators and wire harnesses during welding, bundling, and other operations of the bent part 2. Furthermore, the first rolled edge 221 and the second rolled edge 231 can also improve the overall rigidity of the bent part 2 and enhance its resistance to deformation. In other embodiments, the first rolled edge 221 may only be formed by flipping the second plate 22 along its width direction. Alternatively, the second rolled edge 231 may only be formed by flipping the third plate 23 along its width direction.

[0047] In this embodiment, the first plate 21 of the Z-shaped bending member 2 is welded and installed to the inner wall of the main housing 1, so that the cable ties 3 are fixed to the main housing 1 through the bending member 2. No adhesive is needed, avoiding the evaporation of organic solvents from adhesives, making the wiring harness fixing method more environmentally friendly. It also facilitates the replacement of the cable ties 3, improving the maintenance efficiency of the wiring harness. Because the bending member 2 is welded and fixed to the main housing 1, the vibration resistance of the bending member 2 and the cable ties 3 installed on the bending member 2 is improved, reducing wear on the wiring harness caused by vibration and improving the service life and durability of the wiring harness.

[0048] It should be noted that the cable tie 3 in this embodiment is made of polyamide resin (PA66), and the bending element 2 is made of stainless steel. This allows the combined structure of the bending element 2 and the cable tie 3 to operate for extended periods in environments ranging from -40℃ to 125℃ without the risk of aging or cracking. Furthermore, the polyamide resin cable tie 3 helps reduce wear on the wire harness, avoiding the risk of short circuits caused by wear on multiple wire harnesses. Metal reinforcing ribs can also be pre-embedded in the polyamide resin during injection molding of the cable tie 3 to improve its tensile strength. Alternatively, irregularly shaped cable ties 3 can be customized using 3D printing to adapt to specific wire harness routing or bundling requirements. In one optional embodiment, when a high-power battery pack is installed inside the battery, the cable tie 3 can also be made of high-temperature engineering plastics, such as polyetheretherketone (PEEK) and polyetherimide (PEI), to achieve a temperature resistance of over 200℃. In another optional embodiment, when the battery is installed in a high-voltage battery system, carbon fiber or metal powder can be added to the material of the cable tie 3 to prevent static electricity accumulation.

[0049] like Figure 1 and Figure 4As shown, the fixing hole includes a first hole 232, and the cable tie 3 includes an elastic seat 31 and a fixing part 33 connected to each other. The elastic seat 31 is engaged with the first hole 232, and the fixing part 33 is located on the side of the third plate 23 away from the main body 1. The cable tie 3 is quickly installed on the bent part 2 by engaging the elastic seat 31 with the first hole 232. It should be noted that the elastic seat 31 is elastic. When the elastic seat 31 is inserted into the first hole 232, it undergoes elastic deformation under pressure. After the elastic seat 31 is in place, it abuts against the inner wall of the first hole 232 under its own elastic restoring force, eliminating the assembly gap between the elastic seat 31 and the first hole 232 and preventing abnormal noise when the battery box vibrates. The cable tie 3 is quickly installed on the bent part 2 by engaging the elastic seat 31 with the first hole 232, eliminating the need for complex assembly tools and cumbersome installation steps, greatly improving assembly efficiency. Meanwhile, the fixing part 33 is located on the side of the third plate 23 away from the main housing 1, which facilitates the installation of the elastic seat 31 and the installation and routing of the wire harness, thereby improving installation efficiency.

[0050] It should be noted that the circumferential side of the elastic seat 31 is integrally provided with a serrated structure (such as...). Figure 2 As shown in the figure, after the elastic seat 31 is inserted into place, the serrated structure that passes through the first hole 232 can axially limit the elastic seat 31, preventing the elastic seat 31 from slipping out of the first hole 232, thus achieving the "one-insert-lock" installation effect and improving the installation efficiency of the cable tie 3.

[0051] like Figure 4 As shown, a guide slope 2320 is circumferentially arranged on the side of the first hole 232 away from the main housing 1. The guide slope 2320 is inclined outwards along the axial direction of the first hole 232. By providing the guide slope 2320 in the first hole 232, not only can the elastic seat 31 of the cable tie 3 be quickly inserted into the corresponding first hole 232, but the guide slope 2320 also increases the contact area with the elastic seat 31, reducing the risk of the cable tie 3 coming loose from the first hole 232 when the battery housing experiences high-frequency vibration. Furthermore, when the elastic seat 31 is inserted into the first hole 232 through the guide slope 2320, the guide slope 2320 provides progressive resistance, allowing the operator to clearly perceive the critical point of "insertion into place," thus improving assembly efficiency.

[0052] like Figure 4 and Figure 5As shown, the fixing hole includes a second hole 233, and the cable tie 3 includes an elastic clip 32 and a fixing part 33 connected to each other. The elastic clip 32 is clamped in the second hole 233, and the fixing part 33 is disposed at the end of the third plate 23 away from the second plate 22. This arrangement allows the fixing part 33 to be provided in two directions on the third plate 23, and the types of fixing parts 33 can be different. This allows different fixing parts 33 to be integrated on the third plate 23, improving overall integration and space utilization. Even when multiple wire harnesses are installed, there will be no interference problem. By clamping the second hole 233 with the elastic clip 32, the cable tie 3 is securely installed on the bent part 2, preventing the elastic clip 32 from deflecting or shifting relative to the third plate 23, thus improving the stability of the cable tie 3 installation.

[0053] In this embodiment, as Figure 5 and Figure 6 As shown, the elastic clamp 32 has an open U-shaped structure at its bottom. Two opposing clamping plates are positioned at the bottom of the elastic clamp 32, forming a U-shape with a gap between them. A first claw 321 and a second claw 322 are sequentially inclined along the length of the clamping plates on their inner sides. The two opposing first claws 321 are used to clamp the third plate 23, and the two opposing second claws 322 are used to clamp the inner wall of the second hole 233. Specifically, the first claw 321 is located above the second claw 322. The two opposing first claws 321 inside the elastic clamp 32 form a first V-shape, and the two opposing second claws 322 inside the elastic clamp 32 form a second V-shape. The openings of the first V-shape, the second V-shape, and the elastic clamp 32 all face the same direction. When the elastic clip 32 is inserted into the second hole 233 from the end of the third plate 23 away from the second plate 22, under the compression of the third plate 23, the two second claws 322 of the second V-shaped structure move away from each other and gradually slide into the second hole 233, while the two first claws 321 of the first V-shaped structure move away from each other and clamp on opposite sides of the third plate 23 to achieve stable assembly of the elastic clip 32. When the second claws 322 are fully inserted into the second hole 233, the top of the second claws 322 abuts against the inner wall of the first hole 232, and the third plate 23 clamps between the two first claws 321 of the first V-shaped structure. At this time, the elastic clip 32 is installed in place, realizing the assembly of the cable tie 3 in the second hole 233. In other embodiments, the two clamping plates of the elastic clip 32 are hinged together, and a torsion spring is installed between the two clamping plates so that the two clamping plates are clamped and installed in the second hole 233 by the elastic restoring force of the torsion spring. Since the elastic clip 32 with a torsion spring is prior art, it will not be described in detail here.

[0054] In addition, the second hole 233 is an oblong hole, and the second hole 233 extends along the width direction of the third plate 23. The length of the second hole 233 is slightly greater than the width of the elastic clip 32, so as to make fine adjustment of the installation position of the elastic clip 32 in the second hole 233.

[0055] The fixing holes of the bent component 2 in this embodiment include two first holes 232 and one second hole 233, so that three cable ties 3 can be assembled on the bent component 2 at the same time, improving the space utilization of the bent component 2. In other embodiments, other numbers of fixing holes can be provided on the bent component 2 according to actual working conditions to adjust the number of cable ties 3. In addition, the cable ties 3 can be removed from the bent component 2 by means of disassembly tools, so as to facilitate the replacement or maintenance of the cable ties 3 and the wire harness without damaging the welded structure between the bent component 2 and the main housing 1.

[0056] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery case, characterized by, include: Main box(1); A bending component (2) includes at least a first plate (21), a second plate (22), and a third plate (23) connected in sequence. A bending portion (24) is formed between the first plate (21) and the second plate (22), and between the second plate (22) and the third plate (23). The first plate (21) is fitted and fixed to the inner wall of the main box (1), and the third plate (23) is away from the inner wall of the main box (1). The third plate (23) has a fixing hole. Cable tie (3) is installed in the fixing hole.

2. The battery pack of claim 1, wherein, One of the first plate (21) and the inner wall of the main box (1) is provided with a positioning part (211), and the other is provided with a positioning hole (11); when the first plate (21) is attached to the inner wall of the main box (1), the positioning part (211) is limited to pass through the positioning hole (11).

3. The battery pack of claim 1, wherein, The bending portion (24) between the second plate (22) and the third plate (23) is provided with stress holes (240).

4. The battery pack of claim 1, wherein, The second plate (22) is flipped along both sides in the width direction to form a first rolled edge (221), and / or the third plate (23) is flipped along both sides in the width direction to form a second rolled edge (231).

5. The battery pack of claim 1, wherein, The bending direction between the first plate (21) and the second plate (22) is opposite to the bending direction between the second plate (22) and the third plate (23); the bending angle β between the first plate (21) and the second plate (22) is 90°<β≤105°, and the bending angle α between the second plate (22) and the third plate (23) is 90°<α≤105°.

6. The battery pack of claim 1, wherein, The outer surface of the bent part (2) is provided with an insulating coating.

7. The battery housing according to any one of claims 1 to 6, characterized in that, The fixing hole includes a first hole (232), and the cable tie (3) includes an elastic seat (31) and a fixing part (33) connected to each other. The elastic seat (31) is engaged with the first hole (232), and the fixing part (33) is disposed on the side of the third plate (23) away from the main box (1).

8. The battery pack of claim 7, wherein, A guide slope (2320) is provided circumferentially around the side of the first hole (232) away from the main housing (1); the guide slope (2320) is inclined outward along the axial direction of the first hole (232).

9. The battery case according to any one of claims 1 to 6, characterized by The fixing hole includes a second hole (233), and the cable tie (3) includes an elastic clip (32) and a fixing part (33) connected to each other. The elastic clip (32) is clamped in the second hole (233), and the fixing part (33) is disposed at the end of the third plate (23) away from the second plate (22). The bottom of the elastic clamp (32) is provided with two opposing clamping plates. The inner sides of the two clamping plates are provided with a first claw (321) and a second claw (322) in sequence along the length direction of the clamping plates. The two opposing first claws (321) are used to clamp the third plate (23), and the two opposing second claws (322) are used to clamp the inner wall of the second hole (233).

10. A battery characterized by The battery housing includes any one of claims 1 to 9.

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