Battery box and battery

Abstract

The utility model relates to battery technology field, concretely provides a kind of battery box and battery, to solve the problem of serious torque attenuation at battery box hoisting support place. For this purpose, the battery box of the utility model includes upper cover, lower box, hoisting support and bolt piece. Upper cover is provided with multiple first installation holes;Lower box is set to the below of upper cover, nut piece is set in lower box corresponding with first installation hole;Hoisting support is set to the above of upper cover, hoisting support is provided with second installation hole corresponding with first installation hole;Bolt piece can pass through second installation hole, first installation hole in turn, and is connected with nut piece cooperation, and the flange surface of bolt piece and hoisting support abut. By the flange surface of bolt piece and hoisting support abut, reliable connection is formed between upper cover, lower box and hoisting support, avoid the flange surface of bolt piece and upper cover contact and cause torque attenuation, to ensure that bolt connection maintains enough pre-tightening force in long-term use process.

Description

Technical Field

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

[0002] In the field of battery technology, battery pack covers made of composite materials are increasingly widely used due to their significant advantages such as light weight, good insulation, corrosion resistance, and ease of molding. However, the current connection between the battery pack cover and the lower casing is usually made of steel bolts, which brings many problems to the composite material battery pack cover.

[0003] The composite material battery pack cover is inherently brittle and lacks rigidity. This makes it easy for the torque applied to the bolts to decrease during tightening and subsequent use, leading to bolt loosening. Loose bolts directly affect the battery pack's sealing performance, posing a serious threat to its safety and reliability.

[0004] The situation is particularly complex and severe at the lifting support. Here, the lower housing, upper cover, and lifting support are interconnected, and due to the large number of connecting layers, torque attenuation is especially pronounced. Existing technologies typically add C-shaped steel sleeves at the mounting holes of the upper cover, and inserts are also added to the lifting structure in an attempt to improve the connection. However, this approach merely transforms a flexible connection into a rigid one, without fundamentally changing the number of connecting layers, and therefore cannot effectively solve the problem of severe torque attenuation.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0006] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem of severe torque attenuation at the battery box hoisting bracket.

[0007] In a first aspect, the present invention provides a battery housing, comprising:

[0008] The upper cover has multiple first mounting holes;

[0009] The lower housing is located below the upper cover, and a nut corresponding to the first mounting hole is provided in the lower housing;

[0010] A hoisting bracket is disposed above the upper cover, and the hoisting bracket has a second mounting hole corresponding to the first mounting hole;

[0011] The bolt is capable of passing through the second mounting hole and the first mounting hole in sequence, and is connected to the nut in a mating manner. The flange face of the bolt abuts against the lifting bracket.

[0012] In the preferred embodiment of the battery box described above, a guide post is provided on the hoisting bracket, the guide post has a third mounting hole, the third mounting hole communicates with the second mounting hole, the guide post is assembled in the first mounting hole, and the bottom of the guide post abuts against the top surface of the lower box.

[0013] In the preferred embodiment of the battery box described above, the hoisting bracket includes a horizontal section, a support section disposed at both ends of the horizontal section and extending downward, and a connecting section formed by folding the support section outward, wherein the second mounting hole is formed on the connecting section.

[0014] In the preferred embodiment of the battery box described above, a lifting hole is provided on the support section, which is used to connect with external lifting fixtures.

[0015] In the preferred embodiment of the battery housing described above, the horizontal section, the supporting section, and the connecting section are integrally formed.

[0016] In the preferred embodiment of the battery box described above, a flange edge is provided on the circumferential edge of the upper cover, the flange edge is fitted with the edge of the lower box, and the first mounting hole is opened on the flange edge.

[0017] In the preferred embodiment of the battery housing described above, the battery housing further includes a sealing gasket, which is disposed between the upper cover and the lower housing. The top surface of the sealing gasket is in contact with the flange edge, and the bottom surface of the sealing gasket is in contact with the edge of the lower housing. A fourth mounting hole corresponding to the first mounting hole is provided on the sealing gasket.

[0018] In the preferred embodiment of the battery box described above, the sealing gasket is made of foamed silicone foam.

[0019] In the preferred embodiment of the battery box described above, the thickness of the flange gradually increases from the end connected to the top cover to the end away from the top cover.

[0020] In a second aspect, the present invention provides a battery comprising a battery cell and the aforementioned battery housing, wherein the battery cell is located within the battery housing.

[0021] Those skilled in the art will understand that this utility model provides a battery box, including an upper cover, a lower box, a lifting bracket, and bolts. The upper cover has at least two first mounting holes; the lower box is located below the upper cover and contains nuts corresponding to the first mounting holes; the lifting bracket is located above the upper cover and has second mounting holes corresponding to the first mounting holes; the bolts pass through the second mounting holes and the first mounting holes sequentially, and are connected with the nuts, with the flange face of the bolt abutting against the lifting bracket. By adopting the above technical solution, this utility model can solve the problem of severe torque attenuation at the battery box lifting bracket. Specifically, by designing the bolts to pass through the lifting bracket and the upper cover sequentially and connect with the nuts in the lower box, with the flange face abutting against the lifting bracket, this utility model creates a reliable connection between the upper cover, the lower box, and the lifting bracket, greatly improving the overall structural stability of the battery box. Furthermore, it prevents torque attenuation, ensuring that the bolt connection maintains sufficient preload during long-term use, further improving the reliability of the connection.

[0022] Furthermore, the lifting bracket is equipped with guide columns, each with a third mounting hole that communicates with the second mounting hole. The guide column is fitted into the first mounting hole, and its bottom abuts against the top surface of the lower housing. This structural design allows the force applied to the flange face of the bolts to the upper cover to be transmitted directly through the guide column to the lower housing, rather than following the traditional path of passing through the lifting bracket, upper cover, and lower housing. This reduces the number of connection layers and prevents bolt torque attenuation caused by upper cover deformation.

[0023] Furthermore, the hoisting bracket of this utility model is shaped like a "Z", including a horizontal section, support sections located at both ends of the horizontal section and extending downwards, and a connecting section formed by the outward folding of the support sections. A second mounting hole is opened on the connecting section. This structural design gives the hoisting bracket high strength and rigidity, making the battery box more stable during hoisting, reducing the possibility of swaying and tilting, and improving the safety of hoisting operations. Attached Figure Description

[0024] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a structural schematic diagram of the battery box of this utility model;

[0026] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0027] Figure 3 This is a cross-sectional view of the battery box body of this utility model;

[0028] Figure 4 This is a structural schematic diagram of the hoisting bracket of this utility model.

[0029] List of reference numerals in the attached diagram:

[0030] 1. Top cover; 11. Flange edge; 111. First mounting hole;

[0031] 2. Lower housing; 21. Nuts;

[0032] 3. Lifting bracket; 31. Horizontal section; 32. Support section; 321. Lifting hole; 33. Connecting section; 331. Second mounting hole; 34. Guide column; 341. Third mounting hole;

[0033] 4. Bolts;

[0034] 5. Sealing gasket; 51. Fourth mounting hole. Detailed Implementation

[0035] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are described in conjunction with a battery housing, the battery housing provided by the present invention is equally applicable to other products that need to address the problem of severe torque attenuation.

[0036] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Based on the problem of severe torque attenuation at the battery box mounting bracket pointed out in the background art, this utility model provides a battery box and battery, which aims to effectively solve the problem of severe torque attenuation at the battery box mounting bracket by reducing the number of connection layers between the mounting bracket and the battery box and changing the soft connection of the mounting bracket to the battery box to a hard connection.

[0038] like Figures 1 to 4As shown, this utility model provides a battery box, including an upper cover 1, a lower box 2, a lifting bracket 3, and bolts 4. The upper cover 1 has multiple first mounting holes 111; the lower box 2 is located below the upper cover 1, and contains nuts 21 corresponding to the first mounting holes 111; the lifting bracket 3 is located above the upper cover 1, and contains second mounting holes 331 corresponding to the first mounting holes 111; the bolts 4 can pass through the second mounting holes 331 and the first mounting holes 111 in sequence, and are connected to the nuts 21, with the flange face of the bolts 4 abutting against the lifting bracket 3.

[0039] The top cover 1 is part of the battery housing and has multiple first mounting holes 111 on it. The function of these first mounting holes 111 is to provide channels for subsequent connections, allowing other components to be fixedly connected to the top cover 1 through these holes.

[0040] The lower housing 2 is located below the upper cover 1, and together with the upper cover 1, they form the main structure of the battery housing. Inside the lower housing 2, there is a nut 21 corresponding to the first mounting hole 111 of the upper cover 1. The function of the nut 21 is to cooperate with the bolt 4 to achieve a fastening connection between the components. When the bolt 4 passes through the corresponding hole and is screwed into the nut 21, the upper cover 1 and the lower housing 2 can be firmly connected together.

[0041] The lifting bracket 3 is positioned above the upper cover 1 and is primarily used to provide support and connection points during the lifting and handling of the battery box. The lifting bracket 3 has a second mounting hole 331 corresponding to the first mounting hole 111 on the upper cover 1. This design allows the lifting bracket 3 to be connected to the upper cover 1 via bolts 4, ensuring the stability of the overall connection between the lifting bracket 3 and the battery box during lifting.

[0042] For example, the hoisting bracket 3 of this utility model is made of metal material, which gives the hoisting bracket 3 high structural strength. Further, the hoisting bracket 3 can be made of cold-rolled steel plate, hot-rolled steel plate, galvanized steel plate, aluminum alloy plate, etc., and this utility model does not limit the specific metal material of the hoisting bracket 3.

[0043] Bolt 4 is a key component connecting the various parts. It passes sequentially through the second mounting hole 331 of the lifting bracket 3 and the first mounting hole 111 of the upper cover 1, and then engages with the nut 21 in the lower housing 2. When bolt 4 is tightened, its flange face abuts against the lifting bracket 3. This abutment relationship creates a tight connection between the lifting bracket 3, the upper cover 1, and the lower housing 2, making the entire connection structure more stable and ensuring the structural stability of the entire battery box.

[0044] The top cover 1, made of composite materials, is brittle and has poor rigidity. When connected by bolts, the bolt torque is prone to attenuation. Torque attenuation refers to the gradual reduction in the actual torque acting on the connection after bolt tightening due to various factors (such as deformation of the contact surface and friction). In this invention, when the flange face abuts against the lifting bracket 3, the contact surface is relatively more stable and rigid, ensuring that deformation of the contact surface occurs during bolt tightening and subsequent use, resulting in a more uniform distribution of friction and reducing the possibility of torque attenuation at the contact point. This avoids the flange face directly contacting the top cover 1, preventing deformation of the contact surface and the resulting torque attenuation.

[0045] Therefore, the present invention uses bolts 4 to pass through the lifting bracket 3 and the upper cover 1 in sequence and connect with nuts 21 in the lower housing 2. The flange face abuts against the lifting bracket 3, which makes the upper cover 1, the lower housing 2 and the lifting bracket 3 reliably connected. This greatly improves the overall structural stability of the battery box. In addition, it can prevent the bolts 4 from experiencing torque attenuation, ensuring that the bolt connection always maintains sufficient preload during long-term use, and further improving the reliability of the connection.

[0046] Preferably, such as Figure 4 As shown, a guide post 34 is provided on the hoisting bracket 3. The guide post 34 has a third mounting hole 341, which is connected to the second mounting hole 331. The guide post 34 is assembled in the first mounting hole 111, and the bottom of the guide post 34 abuts against the top surface of the lower box 2.

[0047] In a conventional bolt-nut connection structure for a battery box, when the bolt 4 and nut 21 are connected, the force transmission path is layered. Specifically, the flange face of the bolt 4 first applies pressure to the lifting bracket 3, and after the lifting bracket 3 is subjected to pressure, it transmits the pressure to the upper cover 1. Finally, the upper cover 1 transmits the pressure to the lower box 2, thus forming a three-layer connection: the lifting bracket 3, the upper cover 1, and the lower box 2.

[0048] However, if the top cover 1 is made of composite material, this material itself is brittle and has poor rigidity. During the aforementioned force transmission process, the top cover 1 needs to withstand the pressure from the lifting bracket 3. Due to these characteristics of the composite material, the top cover 1 is prone to deformation and damage under stress, which in turn leads to torque attenuation at the bolt connection. Torque attenuation will seriously affect the connection strength and stability at the battery box lifting bracket 3, increasing the safety risks of the battery box during lifting, transportation, and use.

[0049] This invention alters the force transmission path by installing guide posts 34 on the lifting bracket 3, with the bottom of the guide posts 34 abutting against the top surface of the lower housing 2. When the bolt 4 is connected to the nut 21, the force applied to the upper cover 1 by the flange surface of the bolt 4 no longer follows the traditional path of sequentially passing through the lifting bracket 3, upper cover 1, and lower housing 2. Instead, it is directly transmitted to the lower housing 2 via the guide posts 34. This reduces the number of connection layers to two: the lifting bracket 3 and the lower housing 2. The upper cover 1 no longer bears the direct pressure transmitted by the flange surface of the bolt 4, thus preventing bolt torque attenuation caused by deformation of the upper cover 1. This ensures a stable connection strength between the lifting bracket 3 and the battery housing, improving the safety and reliability of the battery housing during lifting, transportation, and use.

[0050] Furthermore, the guide post 34, fitted into the first mounting hole 111, provides accurate positioning for the lifting bracket 3 during installation. The cooperation between the guide post 34 and the first mounting hole 111 allows the lifting bracket 3 to quickly and accurately find the correct position during installation, avoiding problems such as insecure connections or uneven stress caused by installation position deviations, thus greatly improving installation accuracy.

[0051] Preferably, such as Figure 4 As shown, the hoisting bracket 3 includes a horizontal section 31, a support section 32 located at both ends of the horizontal section 31 and extending downward, and a connecting section 33 formed by folding the support section 32 outward. The second mounting hole 331 is opened on the connecting section 33.

[0052] The horizontal section 31 is one of the main parts of the lifting bracket 3, and it is in a relatively horizontal position. During the lifting process, the horizontal section 31 plays a role in balancing and stabilizing, so that the lifting bracket 3 can remain stable when bearing the weight of the battery box, and avoid tilting or swaying due to uneven force.

[0053] Support sections 32 are located at both ends of the horizontal section 31 and extend downwards. This downward extension design allows the support sections 32 to form a good contact and support relationship with the top cover 1 of the battery box, effectively transferring the weight of the battery box to the lifting equipment. The presence of the support sections 32 increases the contact area between the lifting bracket 3 and the battery box, improving the stability of the support.

[0054] The connecting section 33 is formed by folding the support section 32 outwards. This folding design makes the connecting section 33, the horizontal section 31, and the support section 32 form an organic whole, and also provides a suitable position for opening the second mounting hole 331. The second mounting hole 331 is opened on the connecting section 33. When connecting the lifting bracket 3 to the upper cover 1, the bolt 4 can pass through the second mounting hole 331 on the connecting section 33 and the first mounting hole 111 on the upper cover 1, and then cooperate with the nut 21 in the lower housing 2 to achieve a firm connection between the lifting bracket 3 and the battery housing.

[0055] This invention, by configuring the lifting bracket 3 as described above, provides it with high strength and rigidity. This structure makes the battery box more stable during lifting, reducing the possibility of swaying and tilting, and improving the safety of the lifting operation. At the same time, this structure also facilitates connection with other lifting equipment, further enhancing the reliability and safety of the entire lifting system.

[0056] Preferably, the horizontal section 31, the support section 32, and the connecting section 33 are integrally formed.

[0057] The one-piece molded structure eliminates weak points such as seams and welds, resulting in a tighter and more robust connection between the various parts. When subjected to external forces, the entire lifting support 3 can distribute stress evenly as a whole, avoiding breakage or damage caused by insufficient strength at the connection points, thereby significantly improving the structural strength and reliability of the lifting support 3.

[0058] Preferably, such as Figure 4 As shown, the support section 32 has a lifting hole 321, which is used to connect with external lifting fixtures.

[0059] Due to its downward-extending structural feature, the support section 32 has a lifting hole 321, which is conveniently positioned to allow external lifting fixtures to be directly connected, making the operation simpler and faster. During the production, transportation, and installation of the battery box, frequent lifting operations are required. This design reduces the complexity and time cost of connection operations, thus improving work efficiency.

[0060] Furthermore, the well-designed lifting hole 321 ensures a secure and reliable connection between the external lifting fixture and the lifting support 3, reducing the risk of accidents such as detachment or shaking during the lifting process. The support section 32 in this invention possesses inherent strength and stability, capable of withstanding various forces during lifting, while the lifting hole 321 provides an accurate positioning point for the connection, guaranteeing its accuracy.

[0061] Preferably, such as Figures 1 to 3As shown, a flange edge 11 is provided on the circumferential edge of the upper cover 1. The flange edge 11 fits against the edge of the lower housing 2, and the first mounting hole 111 is opened on the flange edge 11.

[0062] This invention features a flange edge 11 extending circumferentially around the edge of the upper cover 1. The flange edge 11 is an outwardly extending edge structure with a certain width and thickness. The flange edge 11 fits tightly against the edge of the lower housing 2, ensuring a good seal when the upper cover 1 and the lower housing 2 are connected. Furthermore, a first mounting hole 111 is formed on the flange edge 11, allowing the bolts 4 to utilize the structural characteristics of the flange edge 11 to provide a more stable connection when connecting the upper cover 1 and the lower housing 2. The width and thickness of the flange edge 11 increase the stress-bearing area of ​​the connection, dispersing the force transmitted by the bolts 4, thereby improving the structural strength and stability of the entire battery housing.

[0063] Preferably, such as Figure 3 As shown, the battery box also includes a sealing gasket 5, which is disposed between the upper cover 1 and the lower box 2. The top surface of the sealing gasket 5 is in contact with the flange edge 11, and the bottom surface of the sealing gasket 5 is in contact with the edge of the lower box 2. A fourth mounting hole 51 corresponding to the first mounting hole 111 is provided on the sealing gasket 5.

[0064] The sealing gasket 5 is placed between the upper cover 1 and the lower casing 2 to provide a seal and prevent leakage of internal materials and entry of external impurities. Specifically, the top surface of the sealing gasket 5 is tightly fitted to the flange edge 11 of the upper cover 1, and the bottom surface is tightly fitted to the edge of the lower casing 2. This fitting method ensures that the sealing gasket 5 can fully cover the gap between the upper cover 1 and the lower casing 2, forming a good sealing effect.

[0065] The presence of the fourth mounting hole 51 allows the bolt 4 to pass smoothly through the sealing gasket 5, thereby achieving the connection between the upper cover 1, the sealing gasket 5, and the lower housing 2. The bolt 4 can pass sequentially through the second mounting hole 331 (the hole on the connecting section 33 of the lifting bracket 3), the third mounting hole 341 (the hole on the guide post 34), the fourth mounting hole 51 (the hole on the sealing gasket 5), and the first mounting hole 111 (the hole on the flange edge 11), and engage with the nut 21 in the lower housing 2. This connection method not only achieves the connection between the lifting bracket 3 and the upper cover 1, but also firmly connects the upper cover 1, the sealing gasket 5, and the lower housing 2 together.

[0066] Preferably, the sealing gasket 5 is made of foamed silicone foam.

[0067] The expanded silicone foam has a large number of tiny pores that can deform under pressure, filling the tiny gaps between the upper cover 1 and the lower casing 2 to form a tight seal. Compared to other materials, it can better adapt to irregular surfaces and tiny gaps, effectively preventing leakage of electrolyte, gas, etc. inside the battery casing, while also preventing external moisture, dust, and other impurities from entering, thus protecting the safety and performance of the battery.

[0068] Furthermore, the expanded silicone foam possesses excellent elasticity and flexibility, enabling it to maintain stable sealing performance when the battery casing is subjected to vibration, impact, or temperature changes. When the battery casing undergoes slight deformation, the expanded silicone foam can recover its original shape due to its elasticity, continuing to maintain a good sealing effect and reducing the risk of seal failure due to structural deformation.

[0069] It should be noted that in other embodiments, the sealing gasket 5 can also be made of other types of materials such as rubber sealing gaskets or metal sealing gaskets. This utility model does not specifically limit the material of the sealing gasket 5, as long as it can ensure the sealing between the upper cover 1 and the lower housing 2.

[0070] Preferably, the thickness of the flange edge 11 gradually increases from the end connected to the upper cover 1 to the end away from the upper cover 1.

[0071] At the end connected to the top cover 1, the relatively thin flange edge 11 reduces stress concentration at the connection point. When the battery box is subjected to external forces, the flange edge 11 needs to withstand a certain amount of stress. The gradually increasing thickness design allows the stress to be distributed more evenly on the flange edge 11. The thinner end bears relatively less stress, while the thicker end can withstand greater stress, avoiding stress concentration at a single point that could damage the flange edge 11, thus improving the fatigue resistance and service life of the flange edge 11.

[0072] In addition, this utility model also provides a battery (not shown in the figure), which includes a battery cell and a battery housing as described in any of the above embodiments, wherein the battery cell is located inside the battery housing.

[0073] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A battery housing, characterized in that, include: The upper cover (1) has a plurality of first mounting holes (111). The lower housing (2) is located below the upper cover (1), and the lower housing (2) is provided with a nut (21) corresponding to the first mounting hole (111). A hoisting bracket (3) is provided above the upper cover (1), and the hoisting bracket (3) has a second mounting hole (331) corresponding to the first mounting hole (111). Bolt (4), which can pass through the second mounting hole (331) and the first mounting hole (111) in sequence, and is connected with the nut (21), and the flange face of the bolt (4) abuts against the lifting bracket (3); The hoisting bracket (3) is provided with a guide post (34), the guide post (34) has a third mounting hole (341), the third mounting hole (341) is connected to the second mounting hole (331), the guide post (34) is assembled in the first mounting hole (111), and the bottom of the guide post (34) abuts against the top surface of the lower box (2).

2. The battery housing according to claim 1, characterized in that, The hoisting bracket (3) includes a horizontal section (31), a support section (32) located at both ends of the horizontal section (31) and extending downward, and a connecting section (33) formed by folding the support section (32) outward, wherein the second mounting hole (331) is opened on the connecting section (33).

3. The battery housing according to claim 2, characterized in that, The support section (32) is provided with a lifting hole (321), which is used to connect with external lifting fixtures.

4. The battery housing according to claim 2, characterized in that, The horizontal section (31), the support section (32), and the connecting section (33) are integrally formed.

5. The battery housing according to claim 1, characterized in that, A flange edge (11) is provided on the circumferential edge of the upper cover (1), the flange edge (11) is fitted with the edge of the lower box (2), and the first mounting hole (111) is opened on the flange edge (11).

6. The battery housing according to claim 5, characterized in that, The battery housing also includes a sealing gasket (5), which is disposed between the upper cover (1) and the lower housing (2). The top surface of the sealing gasket (5) is in contact with the flange edge (11), and the bottom surface of the sealing gasket (5) is in contact with the edge of the lower housing (2). A fourth mounting hole (51) corresponding to the first mounting hole (111) is provided on the sealing gasket (5).

7. The battery housing according to claim 6, characterized in that, The sealing gasket (5) is made of foamed silicone foam.

8. The battery housing according to claim 5, characterized in that, The thickness of the flange edge (11) gradually increases from the end connected to the upper cover (1) to the end away from the upper cover (1).

9. A battery, characterized in that, It includes a battery cell and a battery housing according to any one of claims 1 to 8, wherein the battery cell is located inside the battery housing.

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