Battery fastening device and battery

Abstract

According to the battery fastening device and the battery disclosed by the utility model, a plurality of battery cell monomers are fastened through a bearing assembly, so that the risk of battery cell expansion deformation caused by inherent characteristics such as rebounding of the thickness of a pole piece in the use process of the battery can be effectively reduced; in addition, the bearing assembly is erected on the inner bottom wall of the shell through the supporting component, so that a gap is formed between the shell and the bearing assembly, a stable air heat insulation layer is constructed by a cavity formed by the gap, and the battery cell monomers are prevented from shaking in the shell under the action of vibration or impact; the air heat insulation layer can significantly reduce the heat transfer efficiency between the shell and the bearing assembly, and can reduce the influence of the external environment temperature on the plurality of battery cell monomers in the bearing assembly. Moreover, when the battery fastening device is subjected to external impact, the first gap is used as a buffer space, so that the risk that the plurality of battery cell monomers are extruded after the shell is deformed can be avoided, and the interiors of the battery cell monomers are prevented from being damaged and even liquid leakage is prevented.

Description

Technical Field

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

[0002] With the increasing demands of the logistics and transportation industry for driver working environment comfort and cold chain transportation, truck parking power supply systems have become one of the core configurations of modern commercial vehicles. As a dedicated energy storage unit independent of the vehicle's starter battery, the parking battery needs to continuously supply power to the air conditioning, on-board refrigerator, lighting system, and electronic equipment when the vehicle is off.

[0003] The application scenarios require batteries to have high energy density, long cycle life, and wide temperature range adaptability. At present, parking batteries mainly use lithium iron phosphate (LFP) or ternary lithium (NCM) battery modules, and high energy storage capacity is achieved by connecting 6 to 12 modules in series to meet the power supply needs of 8 to 12 hours of parking, such as charging the vehicle air conditioner and charging electronic products such as mobile phones.

[0004] Existing battery boxes generally adopt a partitioned, layered layout, using EVA foam or PP plastic partitions for physical isolation and fixation to install multiple battery cells inside the battery box. However, an additional 5% to 15% space needs to be reserved inside the battery box for electrical wiring and connector installation to ensure that multiple battery cells can be electrically connected. This inevitably leads to a certain gap between the battery cells and the inner wall of the battery box, which cannot effectively prevent the problem of increased cell thickness (cell expansion) caused by physical and chemical changes in the internal materials of the battery cells as the number of charge and discharge cycles increases. These changes may lead to increased internal stress, electrolyte decomposition, or damage to the electrode material structure, all of which shorten the battery's lifespan.

[0005] When the vehicle is driving on unpaved roads or braking suddenly, the rigid connection between the separator and the inner wall of the battery box is weak, and it is easy to be displaced or even deformed due to vibration or impact. In addition, there is a certain gap between the individual cells and the inner wall of the battery box, which can easily cause uncontrolled shaking of the individual cells under dynamic load. Moreover, the existing fixing methods (such as straps or buckles) are difficult to effectively suppress the micro-friction between individual cells. Long-term operation may cause electrode wear or interface contact failure, accelerating capacity decay. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides a battery fastening device to solve the problem that the individual cells inside the existing battery box are prone to shaking.

[0007] The technical solution of this utility model is as follows: A battery fastening device, comprising:

[0008] The housing has multiple supporting members provided on its inner bottom wall;

[0009] A carrier assembly, wherein the carrier assembly has an internally defined mounting space for accommodating multiple individual battery cells;

[0010] The load-bearing component is mounted on the support member, and there are gaps between the load-bearing component and the housing on all four sides.

[0011] Furthermore, the bearing assembly includes a bearing member, two opposing side limiting members, a side baffle, and a top baffle. The bearing member and the supporting member are fixedly connected, and a first gap is formed between the bearing member and the bottom wall of the housing. The two side limiting members are respectively installed on the bearing member, and a second gap is formed between the side limiting members and the inner side wall of the housing. Two side baffles are provided, and the two side baffles are respectively installed on the left and right sides of the two side limiting members, and a third gap is formed between the side baffles and the inner side wall of the housing. The top baffle is installed on the top of the two side limiting members, and a fourth gap is formed between the top baffle and the housing.

[0012] Furthermore, the circumferential edge of the side limiting member is bent outward to form a load-bearing flange, a first lateral flange, and a second lateral flange. The load-bearing flange is connected to the top baffle, the first lateral flange is connected to one of the two side baffles, and the second lateral flange is connected to the other of the two side baffles.

[0013] Furthermore, the top baffle is provided with multiple clearance holes that penetrate the thickness of the top baffle, and the multiple clearance holes are provided one-to-one with the explosion-proof valves of multiple battery cells.

[0014] Furthermore, the top baffle includes a base plate and a protruding edge, which is formed by bending the base plate outward at 90° from both sides.

[0015] Furthermore, the carrier is provided with a plurality of first hollow areas, and the plurality of first hollow areas and the plurality of supporting components are staggered.

[0016] Furthermore, the support member is provided with lateral extensions on both sides, and the lateral extensions include at least two bent segments extending in different directions; the housing is provided with a support boss at the position corresponding to the lateral extensions, and the support boss includes at least one support surface adapted to the bent segment, and at least one bent segment and the support boss form a surface contact lap fit.

[0017] Furthermore, the side limiting member is provided with multiple second hollow areas.

[0018] Furthermore, the shell includes a shell body and a cover, the upper end of the shell body is provided with an opening, and the cover covers the opening and is connected to the shell body.

[0019] A battery comprising the aforementioned battery fastening device.

[0020] The advantages of this utility model based on the above solution are as follows:

[0021] The battery fastening device provided by this utility model includes a housing and a support component. The support component has an internal installation space for accommodating multiple battery cells. The support component is mounted on a support member, and the multiple battery cells are installed in the installation space of the support component. By fastening the multiple battery cells with the support component, it can effectively prevent the multiple battery cells from shaking inside the housing under vibration or impact.

[0022] The battery fastening device provided by this utility model supports the carrier assembly on the inner bottom wall of the housing through a supporting member, creating a gap between the housing and the carrier assembly. The cavity formed by this gap constructs a stable air insulation layer. Since the thermal conductivity of air is much lower than that of metal materials, this air insulation layer can significantly reduce the heat transfer efficiency between the housing and the carrier assembly. When there is a difference between the battery operating temperature and the external ambient temperature, it can reduce the impact of the external ambient temperature on the multiple individual cells inside the carrier assembly. Secondly, the battery fastening device unique to this utility model absorbs the impact energy through deformation when the battery is subjected to external impact, effectively protecting the internal components. In particular, the structural design of the fastening device and the housing takes into account the importance of applying appropriate pre-tightening force to the multiple individual cells, avoiding performance degradation or damage due to cell expansion. In addition, the first gap acts as a buffer space, preventing the risk of direct compression of the multiple individual cells when the housing deforms, thereby avoiding safety hazards such as physical deformation of the individual cells and electrolyte leakage caused by excessive compression. This design not only ensures safety under external impact but also extends the service life of the individual cells and improves the stability and reliability of the entire battery pack. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an exploded view of the battery fastening device in an embodiment of the present invention;

[0025] Figure 2This is one of the structural schematic diagrams of the load-bearing component in the embodiments of this utility model;

[0026] Figure 3 This is the second schematic diagram of the structure of the support component in this utility model embodiment;

[0027] Figure 4 This is a cross-sectional view of the battery fastening device in the embodiment of this utility model along its length.

[0028] Figure 5 This is a cross-sectional view of the battery fastening device in the embodiment of this utility model along its width.

[0029] In the figure, 1 is the shell; 11 is the shell body; 12 is the cover; 13 is the bearing boss; 2 is the bearing assembly; 21 is the bearing component; 211 is the first hollow area; 212 is the lateral extension; 22 is the side limiting component; 221 is the bearing flange; 222 is the first lateral flange; 223 is the second lateral flange; 224 is the second hollow area; 23 is the side baffle; 24 is the top baffle; 241 is the clearance hole; 242 is the base plate; 243 is the protruding edge; 3 is the supporting component; 41 is the first gap; 42 is the second gap; 43 is the third gap; 44 is the fourth gap. Detailed Implementation

[0030] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.

[0031] To better understand this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further illustrate the present utility model:

[0032] See Figure 1 As shown in the figure, the battery fastening device provided in this embodiment of the present invention includes a housing 1 and a support component 2, wherein the support component 2 is a fixed frame rigidly connected to the housing 1.

[0033] In this embodiment, the bottom wall of the housing 1 is provided with a plurality of support members 3, the bearing assembly 2 is internally defined with an installation space for accommodating a plurality of battery cells, the bearing assembly 2 is mounted on the support members 3, and there are gaps between the bearing assembly 2 and the housing 1 on all four sides.

[0034] Specifically, the support assembly 2 internally defines an installation space for accommodating multiple individual battery cells. The support assembly 2 is mounted on the support member 3, and the multiple individual battery cells are installed within the installation space of the support assembly 2. The support assembly 2 secures the multiple individual battery cells, thereby increasing the preload on the cells, reducing expansion, and enhancing the safety of the battery pack composed of the cells. The dimensions of the installation space match the dimensions of the battery pack, and the securing of the cells by the support assembly 2 effectively prevents lateral displacement and longitudinal movement of the cells under vibration or impact.

[0035] In this embodiment, the load-bearing component 2 and the housing 1 can be rigidly connected by means of bolts, welding or other methods to ensure that the two remain relatively stationary under vibration or impact.

[0036] The battery fastening device provided in this embodiment of the invention uses a support member 3 to mount the carrier component 2 on the inner bottom wall of the housing 1, creating a gap between the housing 1 and the carrier component 2. The cavity formed by this gap constructs a stable air insulation layer. Since the thermal conductivity of air is much lower than that of metal materials, this air insulation layer can significantly reduce the heat transfer efficiency between the housing 1 and the carrier component 2. When there is a difference between the battery operating temperature and the external ambient temperature, it can reduce the impact of the external ambient temperature on the multiple individual battery cells inside the carrier component 2. Secondly, the battery fastening device unique to this invention absorbs impact energy through deformation when the battery is subjected to external impact, effectively protecting the internal components. In particular, the structural design of the fastening device and the housing 1 considers the importance of applying appropriate pre-tightening force to the multiple individual battery cells, avoiding performance degradation or damage due to cell expansion. Furthermore, the first gap 41 acts as a buffer space, preventing the risk of direct compression of the multiple individual battery cells when the housing 1 deforms, thereby avoiding safety hazards such as physical deformation of the individual battery cells and electrolyte leakage caused by excessive compression. This design not only ensures safety under external impacts, but also extends the lifespan of individual cells and improves the stability and reliability of the entire battery pack.

[0037] See Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the bearing assembly 2 includes a bearing member 21, two opposing side limiting members 22, a side baffle 23, and a top baffle 24. The bearing member 21 is fixedly connected to the support member 3, and a first gap 41 is formed between the bearing member 21 and the bottom wall of the housing 1. The two side limiting members 22 are respectively installed on the bearing member 21, and a second gap 42 is formed between the side limiting members 22 and the inner side wall of the housing 1. Two side baffles 23 are provided, and the two side baffles 23 are respectively installed on the left and right sides of the two side limiting members 22, and a third gap 43 is formed between the side baffles 23 and the inner side wall of the housing 1. The top baffle 24 is installed on the top of the two side limiting members 22, and a fourth gap 44 is formed between the top baffle 24 and the housing 1. With this design, when the casing 1 is affected by ambient temperature (such as low temperature in winter / high temperature in summer), the air insulation layer composed of the first gap 41, the second gap 42, the third gap 43 and the fourth gap 44 can delay the conduction of ambient temperature to the battery pack. The air insulation layer reduces the impact of external temperature on the battery pack and ensures the stable performance of the battery pack.

[0038] See Figure 2 and Figure 3 As shown, the side limiting member 22 has its circumferential edge bent outward to form a bearing flange 221, a first lateral flange 222, and a second lateral flange 223. The bearing flange 221 is connected to the top baffle 24, the first lateral flange 222 is connected to one of the two side baffles 23, and the second lateral flange 223 is connected to the other of the two side baffles 23.

[0039] Specifically, the flange design provides mounting surfaces for the top baffle 24 and the side baffles 23. The top baffle 24 and the two side baffles 23 are connected to the load-bearing flange 221, the first lateral flange 222 and the second lateral flange 223 respectively by welding or bolts. This design simplifies the assembly process and reduces the assembly difficulty.

[0040] See Figure 2 and Figure 3 As shown, the top baffle 24 is provided with a plurality of clearance holes 241 that penetrate the thickness of the top baffle 24. The plurality of clearance holes 241 and the explosion-proof valves of the plurality of battery cells are provided one to one. Specifically, the top baffle 24 includes a base plate 242 and a protruding edge 243, which is formed by bending outward at 90° from both sides of the base plate 242.

[0041] In this embodiment, the carrier 21 is provided with a plurality of first hollow areas 211, and the plurality of first hollow areas 211 and the plurality of support members 3 are staggered.

[0042] In this embodiment, the support member 21 is provided with lateral extensions 212 on both sides, and the lateral extensions 212 include at least two bent sections extending in different directions; the housing 1 is provided with a support boss 13 corresponding to the lateral extensions 212, and the support boss 13 includes at least one support surface adapted to the bent section, and at least one bent section forms a surface contact lap fit with the support boss 13; specifically, the side limiting member 22 is provided with a plurality of second hollow areas 224.

[0043] See Figure 1 As shown, the shell 1 includes a shell body 11 and a cover 12. The upper end of the shell body 11 is provided with an opening, and the cover 12 covers the opening and is connected to the shell body 11.

[0044] It should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art, or the orientation or positional relationship that the product is usually placed in during use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to 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, it should not be construed as a limitation of this application.

[0045] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0046] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. A battery fastening device, characterized in that, include: The shell (1) has multiple supporting members (3) provided on the bottom wall of its inner side; The carrier assembly (2) has an internally defined installation space for accommodating multiple individual battery cells; The bearing component (2) is mounted on the support member (3), and there are gaps between the bearing component (2) and the housing (1) on all four sides.

2. The battery fastening device as described in claim 1, characterized in that: The supporting component (2) includes a supporting member (21), two opposing side limiting members (22), a side baffle (23), and a top baffle (24). The supporting member (21) and the supporting member (3) are fixedly connected, and a first gap (41) is formed between the supporting member (21) and the bottom wall of the housing (1). The two side limiting members (22) are respectively installed on the supporting member (21), and the side limiting members (22) and the inner side of the housing (1) are connected. A second gap (42) is formed between the walls. Two side baffles (23) are provided. The two side baffles (23) are respectively installed on the left and right sides of the two side limiting members (22). A third gap (43) is formed between the side baffles (23) and the inner side wall of the housing (1). The top baffle (24) is installed on the top of the two side limiting members (22). A fourth gap (44) is formed between the top baffle (24) and the housing (1).

3. The battery fastening device as described in claim 2, characterized in that: The side limiting member (22) has its circumferential edge bent outward to form a bearing flange (221), a first lateral flange (222), and a second lateral flange (223). The bearing flange (221) is connected to the top baffle (24), the first lateral flange (222) is connected to one of the two side baffles (23), and the second lateral flange (223) is connected to the other of the two side baffles (23).

4. The battery fastening device as described in claim 2, characterized in that: The top baffle (24) is provided with a plurality of clearance holes (241) that penetrate the thickness of the top baffle (24), and the plurality of clearance holes (241) and the explosion-proof valves of the plurality of battery cells are provided one to one.

5. The battery fastening device as described in claim 2, characterized in that: The top baffle (24) includes a base plate (242) and a protruding edge (243), which is formed by bending the base plate (242) outward by 90° from both sides.

6. The battery fastening device as described in claim 2, characterized in that: The carrier (21) is provided with a plurality of first hollow areas (211), and the plurality of first hollow areas (211) and the plurality of supporting members (3) are staggered.

7. The battery fastening device as described in claim 2, characterized in that: The support member (21) has lateral extensions (212) on both sides, and the lateral extensions (212) include at least two bent sections extending in different directions; the housing (1) has a support boss (13) at the position corresponding to the lateral extensions (212), and the support boss (13) includes at least one support surface adapted to the bent section, and at least one bent section and the support boss (13) form a surface contact lap fit.

8. A battery fastening device as described in claim 2, characterized in that: The side limiting member (22) is provided with multiple second hollow areas (224).

9. A battery fastening device as described in claim 2, characterized in that: The shell (1) includes a shell body (11) and a cover (12). The upper end of the shell body (11) is provided with an opening, and the cover (12) covers the opening and is connected to the shell body (11).

10. A battery, characterized in that, Includes the battery fastening device according to any one of claims 1 to 9.

Images