Battery box and energy storage system

Abstract

The utility model relates to battery box and energy storage system, and energy storage system includes a plurality of battery box. The battery box includes box body, limiting component, including U type frame and pressing plate frame, U type frame sets up in the box body, U type frame includes long side board and two short side boards symmetrical setting on long side board, and the both ends of pressing plate frame are connected to two short side boards, thereby U type frame and pressing plate frame jointly enclose the storage area, and the electric core subassembly includes a plurality of electric core, each electric core all sets up in the storage area, and each electric core is arranged one by one along the length extension direction of long side board, and the width direction of each electric core is all aligned or parallel to the length extension direction of long side board, and the top of each electric core all bears on the pressing plate frame. In this way, the limiting component can complete the relative position fixation of each electric core in the electric core subassembly, thereby dispenses with the setting of steel band, greatly reduces the production manufacturing cost of battery box. The removal of steel band can also reduce the volume of box body and improve the energy density of battery box.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more particularly to battery boxes and energy storage systems. Background Technology

[0002] In the field of battery technology, particularly in applications involving modular battery packs or large energy storage units, the internal structural design of the enclosure is crucial for ensuring stable fixation of the battery cells, effective heat dissipation, and prevention of mechanical damage. However, existing batteries still have certain shortcomings in practical applications: Firstly, steel straps are currently commonly used to secure the individual cells within the battery casing, but the use of steel straps inherently increases manufacturing costs. Secondly, after securing the cell modules with steel straps, sheet metal brackets are used to assemble the bundled modules into the battery casing, resulting in a larger overall battery size and reduced compactness. Utility Model Content

[0003] This invention provides a battery box and energy storage system that can solve the problems of high manufacturing cost and low compactness.

[0004] This utility model provides a battery box, which includes: Box; A limiting component includes a U-shaped frame and a pressure plate frame. The U-shaped frame is disposed inside the box. The U-shaped frame includes a long side plate and two short side plates symmetrically arranged on the long side plate. The two ends of the pressure plate frame are respectively connected to the two short side plates, so that the U-shaped frame and the pressure plate frame together enclose a storage area. The battery cell assembly includes a plurality of battery cells, each of which is disposed in the storage area and is arranged one by one along the length extension direction of the long side plate. The width direction of each battery cell is aligned with or parallel to the length extension direction of the long side plate, and the top of each battery cell abuts against the pressure plate frame.

[0005] Preferably, the limiting component further includes a buffer structure, which includes two long-side buffer pads and two short-side buffer pads; Two long-side buffer pads are symmetrically arranged in the width extension direction of the battery cell assembly, and two short-side buffer pads are symmetrically arranged in the length extension direction of the battery cell assembly. The short-side buffer pad is clamped between the short-side plate and the cell assembly, and the long-side buffer pad is clamped between the cell assembly and the housing.

[0006] Preferably, the battery cell assembly has a first side and a second side facing each other, and the buffer structure includes four short-side buffer pads, wherein two of the short-side buffer pads are disposed on the first side and the other two of the short-side buffer pads are disposed on the second side.

[0007] Preferably, the battery cell assembly includes four battery cells arranged one after another along the same straight line. Each battery cell is located on the long side plate, and the width direction of each battery cell is consistent. Adjacent battery cells abut against each other, and the two short side plates abut against two battery cells respectively.

[0008] Preferably, the limiting component further includes two EVA pads, which are disposed one-to-one on the two short side plates, and each EVA pad is clamped between the short side plate and the inner wall of the box.

[0009] Preferably, the limiting component further includes two limiting brackets, which are respectively disposed on the two short side plates, and two EVA pads are respectively disposed on the two limiting brackets, with each EVA pad being clamped between the limiting bracket and the inner wall surface of the housing.

[0010] Preferably, each of the short side plates is provided with a bending wing; The pressure plate frame includes a pressure plate, two reversing plates and two support plates. The pressure plate is provided with two symmetrical connection positions. The two reversing plates are symmetrically arranged on the pressure plate. The two support plates are arranged one-to-one on the two reversing plates and are symmetrical to each other on the pressure plate. The two connection points correspond one-to-one with the two bending wings, and the connection points are aligned and connected with the bending wings.

[0011] Preferably, the housing is provided with pole posts; The battery box also includes a battery management device, which includes a fiber separator, a battery management circuit board, and a cable assembly. The fiber separator is disposed on two support plates, and the battery management circuit board is disposed at intervals on the fiber separator. The battery cell assembly is connected to the terminal and the battery management circuit board respectively through the cable assembly. The battery management circuit board is also connected to the terminal through the cable assembly.

[0012] Preferably, the pressure plate frame is provided with a plurality of wire buckles, which are arranged one by one along the length extension direction of the pressure plate.

[0013] Preferably, the box includes a shell and a cover, with the cover covering the shell, so that the box and the cover together enclose a storage cavity; The battery cell assembly and the limiting assembly are respectively disposed in the storage cavity, and the U-shaped frame abuts against the inner wall surface of the storage cavity.

[0014] This utility model also provides an energy storage system, which includes the battery box described in any of the above technical solutions. The energy storage system includes multiple battery boxes, and each battery box is electrically connected.

[0015] The following are the beneficial effects of implementing this utility model: This utility model relates to a battery box and an energy storage system. In the battery box, a U-shaped frame includes long side plates and short side plates. The long side plates limit the position of each battery cell from the bottom, while the short side plates are parallel to the height of the battery cells on one hand, and also limit the position of the battery cell assembly from both sides on the other. During assembly, each battery cell is directly aligned within the U-shaped frame and the corresponding pressure plate is assembled to fix the individual cells. Then, the limiting components with the fixed battery cell assemblies are placed directly into the box to complete the initial installation of the battery cell assemblies.

[0016] In this way, the limiting component can fix the relative position of each cell in the battery pack, eliminating the need for steel strips. This, in turn, eliminates the cost of steel strip cutting, bending, and welding equipment, as well as other equipment related to battery cell steel strip processing, ultimately greatly reducing the manufacturing cost of the battery box. Furthermore, the removal of the steel strip also eliminates the need for sheet metal supports for steel strip winding, reducing the space required for these supports in the battery box and minimizing its size, thereby increasing the energy density of the battery box. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0018] Figure 1 This is a schematic diagram of the battery box structure in some embodiments of this utility model; Figure 2 This is an exploded view of the battery box in some embodiments of this utility model; Figure 3 This is another exploded view of the battery box in some embodiments of this utility model; Figure 4 yes Figure 3 A partial structural diagram of the battery box is shown. Figure 5 This is a schematic diagram of the internal structure of the battery box in some embodiments of this utility model; Figure 6 yes Figure 4The image shows an enlarged view of the battery box at point A. Figure 7 yes Figure 5 The image shows an enlarged view of the battery box at point B. Figure 8 This is a schematic diagram of the energy storage system in some embodiments of this utility model.

[0019] Label Explanation: 10 - Battery box; 20 - Storage area; 30 - Energy storage system; 1-Box body; 11-Shell; 12-Lid; 121-Pole post; 13-Storage cavity; 2-Limiting component; 21-U-shaped frame; 211-Long side plate; 212-Short side plate; 213-Bending wing; 22-Pressure plate frame; 221-Pressure holding plate; 224-Wire buckle; 222-Reversing plate; 223-Support plate; 23-Buffer structure; 24-Long side buffer pad; 25-Short side buffer pad; 26-EVA pad; 27-Limiting bracket; 3-Cell assembly; 31-Cell; 311-First side; 312-Second side; 4-Battery management device; 41-Fiber separator; 42-Battery management circuit board; 43-Cable assembly. Detailed Implementation

[0020] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0021] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0023] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 according to the specific circumstances.

[0024] Figure 1 and Figure 2 The battery box 10 shown in some embodiments of the present invention includes a box body 1, a limiting component 2 and a battery cell assembly 3, wherein the battery cell assembly 3 is disposed on the limiting component 2 and the limiting component 2 is disposed inside the box body 1.

[0025] like Figures 2 to 7 As shown, the limiting component 2 includes a U-shaped frame 21 and a pressure plate frame 22. The U-shaped frame 21 is set inside the box 1. The U-shaped frame 21 includes a long side plate 211 and two short side plates 212 symmetrically arranged on the long side plate 211. The two ends of the pressure plate frame 22 are respectively connected to the two short side plates 212, so that the U-shaped frame 21 and the pressure plate frame 22 together enclose the storage area 20.

[0026] It should be noted that the housing 1 is used to house and protect the internal components of the battery box 10, providing overall structural support and environmental isolation. The limiting component 2 is used to fix the cell assembly 3, preventing it from shifting or vibrating during operation and ensuring mechanical stability.

[0027] The battery cell assembly 3 includes a number of battery cells 31, each of which is disposed in the storage area 20. Each battery cell 31 is arranged one by one along the length extension direction D1 of the long side plate 211, and the width direction D2 of each battery cell 31 is aligned with or parallel to the length extension direction D1 of the long side plate 211. The top of each battery cell 31 abuts against the pressure plate frame 22.

[0028] Understandably, the purpose of the housing 1 is to ensure the mechanical stability of the internal components and to isolate the battery cell assembly 3 from external impacts or environmental factors, thereby improving the service life and safety of the battery housing.

[0029] The U-shaped frame 21 is roughly U-shaped. On the U-shaped frame 21, the long side plate 211 provides a guiding reference for the arrangement of the battery cells, while the short side plates 212 provide vertical support on opposite sides of the battery cell assembly 3. The long side plate 211 and the two short side plates 212 together form positional constraints in three directions. The pressure plate frame 22 is used to hold the top of the battery cell 31, applying a vertical fixing force to prevent the battery cell from floating or loosening. Thus, the arrangement of the U-shaped frame 21 and the pressure plate frame 22 allows the product to be stably fixed to the battery cell assembly without the need for steel strapping, improving reliability. The storage area 20, formed by the U-shaped frame 21 and the pressure plate frame 22, provides an orderly storage space for the battery cell 31, optimizing the internal layout.

[0030] The battery cell assembly 3 includes several battery cells 31 for storing electrical energy and providing power output when needed. The arrangement of each battery cell 31 (arranged sequentially along the length extension direction D1 of the long side plate 211, and aligned or parallel to D1 in the width direction D2) is designed to maximize space utilization. In this way, the arrangement of the battery cells can be optimized, ineffective space can be reduced, and the compactness and energy density of the battery pack can be improved.

[0031] It should be noted that, in this utility model, on the one hand, by setting a limiting component that forms the storage area by combining a U-shaped frame and a pressure plate frame, the traditional combination of steel strap binding and sheet metal bracket is replaced, thereby significantly reducing manufacturing costs. The symmetrical structure of the long and short side plates of the U-shaped frame and the direct connection between the pressure plate frame and the short side plates eliminate the additional manufacturing and assembly steps of the steel strap and sheet metal bracket, reducing material consumption and process complexity.

[0032] On the other hand, by arranging the battery cells one by one along the length of the long side plate and aligning the width of the cells with the length of the long side plate, the compactness of the battery box is improved. This arrangement makes full use of the space layout of the storage area, avoids the accumulation of gaps caused by the traditional steel strip binding of the battery cell modules, and saves the space occupied by sheet metal brackets, thereby optimizing the overall volume and improving the energy density of the battery box.

[0033] Furthermore, by pressing the top of the battery cell against the pressure plate frame, a stable fixation of the battery cell is formed, thereby ensuring the mechanical stability of the battery cell assembly without the need for steel strapping.

[0034] like Figure 3 As shown, in some embodiments of the battery box 10, the limiting component 2 further includes a buffer structure 23, which is used to absorb and disperse external impacts or vibrations, reduce mechanical stress on the battery cell assembly 3, prevent displacement or damage to the battery cell 31 due to vibration or collision, and improve the durability of the battery box.

[0035] like Figure 4As shown, the buffer structure 23 includes two long-side buffer pads 24 and two short-side buffer pads 25. The two long-side buffer pads 24 are symmetrically arranged on the width extension direction D3 of the cell assembly 3, and the two short-side buffer pads 25 are symmetrically arranged on the length extension direction D4 of the cell assembly 3. The short-side buffer pads 25 are clamped between the short-side plate 212 and the cell assembly 3, and the long-side buffer pads 24 are clamped between the cell assembly 3 and the housing 1.

[0036] Understandably, the long-side buffer pad 24 is used to provide elastic support in the width direction D3, isolating the impact force transmitted by the housing 1. The short-side buffer pad 25 is used to absorb the force in the length direction D4, preventing the cell assembly 3 from loosening in the short-side direction.

[0037] It should be noted that, through the setting of the buffer structure 23, this embodiment achieves multi-directional buffer protection for the battery cell assembly 3, significantly improving the vibration resistance and mechanical stability of the battery box. Furthermore, the buffer structure 23 can fill the manufacturing and assembly gaps between the battery cell assembly 3 and the housing 1, and also fill the manufacturing and assembly gaps between the battery cell assembly 3 and the U-shaped frame 21, greatly improving the positional stability and reliability of the battery cell assembly 3.

[0038] like Figure 3 and Figure 4 As shown, in some embodiments of the battery box 10, the cell assembly 3 is provided with opposing first side 311 and second side 312, and the buffer structure 23 includes four short side buffer pads 25, of which two short side buffer pads 25 are provided on the first side 311 and the other two short side buffer pads 25 are provided on the second side 312.

[0039] Understandably, the four short-side buffer pads 25 are symmetrically distributed along the length extension direction D4 of the cell assembly 3, so that the compressive force on both sides of the cell assembly 3 is evenly transmitted. This further reduces the risk of stress concentration on one side, avoids deformation or structural fatigue of the cell 31 due to uneven stress, and significantly improves the mechanical stability of the cell assembly 3 under dynamic conditions (such as vibration, charge and discharge expansion).

[0040] Furthermore, the four short-side buffer pads 25 reduce the reliance on assembly precision. Even if a single short-side buffer pad 25 has slight dimensional tolerances, the remaining short-side buffer pads 25 can still compensate for the support, ensuring that the cell assembly 3 and the short-side plate 212 always maintain a tight yet flexible clamping state, improving the consistency of mass production and the reliability of long-term use.

[0041] like Figure 4As shown, in some embodiments of the battery box 10, the battery cell assembly 3 includes four battery cells 31, which are arranged one by one along the same straight line. Each battery cell 31 is located on the long side plate 211, and the width direction D2 of each battery cell 31 is consistent. Adjacent battery cells 31 abut against each other, and two short side plates 212 abut against two battery cells 31 respectively.

[0042] Understandably, the four cells 31 arranged one by one along the same straight line can form a compact energy storage unit. Through their arrangement and mutual support, the cell assembly 3 achieves a self-supporting structure. In this way, the space of the storage area 20 can be maximized, ineffective gaps can be reduced, and the energy density and volumetric efficiency of the battery box can be improved.

[0043] By configuring the width direction D2 of each cell 31 to be consistent, the arrangement direction of each cell 31 can be ensured to be uniform, simplifying manufacturing and assembly and optimizing thermal management. In this way, the risk of heat accumulation between cells 31 is reduced through standardized layout, and the uniformity of heat dissipation and operating efficiency are improved.

[0044] like Figure 3 and Figure 4 As shown, in some embodiments of the battery box 10, the limiting component 2 further includes two EVA pads 26, which are disposed one-to-one on the two short side plates 212, and each EVA pad 26 is clamped between the short side plate 212 and the inner wall surface of the box 1.

[0045] Understandably, the EVA pad 26 is used to buffer the mechanical vibration between the housing 1 and the short side plate 212 through elastic deformation, further reducing the impact force transmitted to the cell assembly 3. Simultaneously, it can also compensate for the fitting clearance and manufacturing tolerances between the limiting component 2 and the housing 1, further improving product stability. Of course, the EVA pad 26 can also evenly distribute the local pressure of the short side plate 212 on the inner wall of the housing 1, preventing long-term compression from causing housing deformation.

[0046] It should be noted that the solution adopted in this embodiment can improve the vibration resistance of the battery box 10 and reduce the fretting wear of the battery cells 31 caused by mechanical vibration. It also avoids stress concentration on the inner wall of the box 1 due to hard contact, thus extending the overall structural lifespan.

[0047] like Figures 3 to 5 As shown, in some embodiments of the battery box 10, the limiting component 2 further includes two limiting brackets 27, which are respectively disposed on the two short side plates 212, and two EVA pads 26 are respectively disposed on the two limiting brackets 27. Each EVA pad 26 is clamped between the limiting bracket 27 and the inner wall surface of the box 1.

[0048] Understandably, the limiting bracket 27 provides additional support points for the short side plate 212, enhancing the overall structural rigidity of the limiting assembly 2. The limiting bracket 27 also prevents the EVA pad 26 from being directly bonded to the short side plate 212.

[0049] It should be noted that the solution of this type of embodiment can improve the deformation resistance of the short side direction of the limiting bracket 27 (that is, the setting direction of the short side plate 212) and prevent the cell assembly 3 from shifting.

[0050] like Figure 6 and Figure 7 As shown, in some embodiments of the battery box 10, each short side plate 212 is provided with a bending wing 213; The pressure plate frame 22 includes a pressure plate 221, two reversing plates 222 and two support plates 223. The pressure plate 221 is provided with two symmetrical connection positions. The two reversing plates 222 are symmetrically arranged on the pressure plate 221. The two support plates 223 are arranged one-to-one on the two reversing plates 222 and are symmetrical to each other on the pressure plate 221. The two connecting positions correspond one-to-one with the two bending wings 213, and the connecting positions are aligned and connected with the bending wings 213.

[0051] Understandably, the bending wing 213 provides a stable connection surface for assembly with the pressure plate frame 22, ensuring that the holding force applied by the pressure plate frame 22 to the cell assembly is transmitted along the design direction; specifically, it ensures that the pressure plate 221 directly abuts against the top of the cell 31, providing vertical constraint. The arrangement of the commutation plate 222 allows the support plate 223 and the pressure plate 221 to be spaced apart. Of course, this spacing can be flexibly set by adjusting the size of the commutation plate 222, thereby making room for other components in the housing 1 (such as the arrangement of wires and the placement of circuit components). The support plate 223 is used to provide a stable and reliable mounting position for the corresponding components.

[0052] It should be noted that the pressure plate 221 is connected to the two bending wings 213 through two connection positions, and each connection position connects only one bending wing 213. Furthermore, the connection positions and the bending wings 213 can be connected by threaded fasteners.

[0053] like Figures 1 to 3 As shown, in some embodiments of the battery box 10, the box body 1 is provided with terminal posts 121.

[0054] like Figure 2 and Figure 3 As shown, the battery box 10 also includes a battery management device 4. (As indicated...) Figure 3 , Figure 6 and Figure 7As shown, the battery management device 4 includes a fiber separator 41, a battery management circuit board 42, and a cable assembly 43. The fiber separator 41 is disposed on two support plates 223. The battery management circuit board 42 is disposed on the fiber separator 41 at intervals. The cell assembly 3 is connected to the terminal post 121 and the battery management circuit board 42 respectively through the cable assembly 43. The battery management circuit board 42 is also connected to the terminal post 121 through the cable assembly 43.

[0055] Understandably, the fiber separator 41 is used to form an effective isolation between the battery management circuit board 42 and the metal support plate 223, improving the product's operational safety and reliability. The battery management circuit board 42 connects the cell assembly 3 and the terminal post 121 via a cable group 43 to achieve charge / discharge control and status monitoring. The cable group 43 can be configured to include multiple cables, each with a preset connection method to electrically connect the corresponding components.

[0056] It should be noted that the suspended arrangement of the battery management circuit board 42 can avoid thermal coupling and improve monitoring accuracy and system reliability.

[0057] like Figure 6 and Figure 7 As shown, in some embodiments of the battery box 10, the pressure plate frame 22 is provided with a plurality of wire buckles 224, which are arranged one by one along the length extension direction of the pressure plate 221.

[0058] Understandably, the cable clip 224 is used to secure the corresponding cables, improving the neatness of the cables inside the product and thus enhancing maintenance convenience. Simultaneously, since the cable clip 224 is positioned on the clamping plate 221 and between the two commutator plates 222, the cables restrained by the cable clip 224 are also protected by the two commutator plates 222, thereby improving the durability of the components.

[0059] It should be noted that using the methods described in this embodiment can reduce the risk of cable interface loosening or insulation wear due to cable vibration, thus significantly reducing the failure rate. It also standardizes the wiring path, facilitating quick cable location during maintenance and improving maintenance efficiency.

[0060] like Figures 1 to 5 As shown, in some embodiments of the battery box 10, the box body 1 includes a shell 11 and a cover 12, with the cover 12 covering the shell 11, so that the box body 1 and the cover 12 together enclose the storage cavity 13. The battery cell assembly 3 and the limiting assembly 2 are respectively disposed in the storage cavity 13, and the U-shaped frame 21 abuts against the inner wall surface of the storage cavity 13.

[0061] Understandably, the housing 11 provides bottom and lateral support, and the cover 12 achieves top closure, together forming a reliable and effective dust and water barrier.

[0062] It should be noted that the U-shaped frame 21 abuts against the inner wall of the box 1. This abutment can be configured as direct abutment or indirect abutment. Regardless of the abutment method used, it can improve the impact resistance of the product.

[0063] Figure 8 An energy storage system 30 according to some embodiments of the present invention is shown. The energy storage system 30 includes a plurality of battery boxes 10, which are electrically connected.

[0064] Understandably, the energy storage system can achieve modular expansion of energy storage capacity by freely combining battery boxes 10 in parallel / series topologies.

[0065] The following are the beneficial effects of implementing this utility model: This utility model relates to a battery box and energy storage system. The battery box includes a U-shaped frame comprising long side plates and short side plates. The long side plates limit the position of each battery cell from the bottom, while the short side plates are parallel to the height of the battery cells and also limit the position of the battery cell assembly from both sides. During assembly, each battery cell is directly aligned within the U-shaped frame and the corresponding pressure plate is assembled to fix it in place. Then, the limiting components with the fixed battery cell assembly are placed directly into the box to complete the initial installation of the battery cell assembly.

[0066] In this way, the limiting component can fix the relative position of each cell in the battery pack, eliminating the need for steel strips. This, in turn, eliminates the cost of steel strip cutting, bending, and welding equipment, as well as other equipment related to battery cell steel strip processing, ultimately greatly reducing the manufacturing cost of the battery box. Furthermore, the removal of the steel strip also eliminates the need for sheet metal supports for steel strip winding, reducing the space required for these supports in the battery box and minimizing its size, thereby increasing the energy density of the battery box.

[0067] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the modules in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0068] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery box, characterized in that, include: Box (1); The limiting component (2) includes a U-shaped frame (21) and a pressure plate frame (22). The U-shaped frame (21) is disposed inside the box (1). The U-shaped frame (21) includes a long side plate (211) and two short side plates (212) symmetrically disposed on the long side plate (211). The two ends of the pressure plate frame (22) are respectively connected to the two short side plates (212), so that the U-shaped frame (21) and the pressure plate frame (22) together enclose the storage area (20); and The battery cell assembly (3) includes a plurality of battery cells (31), each of which is disposed in the storage area, and each of which is disposed one by one along the length extension direction of the long side plate (211), and the width direction of each of which is aligned with or parallel to the length extension direction of the long side plate (211), and the top of each of which is abutted against the pressure plate frame (22).

2. The battery box according to claim 1, characterized in that, The limiting component (2) also includes a buffer structure (23), which includes two long-side buffer pads (24) and two short-side buffer pads (25). Two long-side buffer pads (24) are symmetrically arranged in the width extension direction of the cell assembly (3), and two short-side buffer pads (25) are symmetrically arranged in the length extension direction of the cell assembly (3). The short-side buffer pad (25) is sandwiched between the short-side plate (212) and the cell assembly (3), and the long-side buffer pad (24) is sandwiched between the cell assembly (3) and the housing (1).

3. The battery box according to claim 2, characterized in that, The battery cell assembly (3) is provided with a first side (311) and a second side (312) opposite to each other. The buffer structure (23) includes four short side buffer pads (25), two of which are disposed on the first side (311) and the other two are disposed on the second side (312).

4. The battery box according to any one of claims 1 to 3, characterized in that, The battery cell assembly (3) includes four battery cells (31), which are arranged one by one along the same straight line. Each battery cell (31) is located on the long side plate (211), and the width direction of each battery cell (31) is consistent. Two adjacent battery cells (31) abut against each other, and two short side plates (212) abut against two battery cells (31) respectively.

5. The battery box according to claim 1, characterized in that, The limiting component (2) also includes two EVA pads (26), which are respectively disposed on the two short side plates (212), and each EVA pad (26) is clamped between the short side plate (212) and the inner wall surface of the box (1).

6. The battery box according to claim 5, characterized in that, The limiting component (2) further includes two limiting brackets (27), which are respectively disposed on the two short side plates (212), and two EVA pads (26) are respectively disposed on the two limiting brackets (27). Each EVA pad (26) is clamped between the limiting bracket (27) and the inner wall surface of the box (1).

7. The battery box according to claim 1, characterized in that, Each of the short side plates (212) is provided with a bending wing (213); The pressure plate frame (22) includes a pressure plate (221), two reversing plates (222) and two support plates (223). The pressure plate (221) is provided with two symmetrical connection positions. The two reversing plates (222) are symmetrically arranged on the pressure plate (221). The two support plates (223) are arranged one-to-one on the two reversing plates (222) and are symmetrical to each other on the pressure plate (221). The two connection positions correspond one-to-one with the two bending wings (213), and the connection positions are aligned and connected with the bending wings (213).

8. The battery box according to claim 7, characterized in that, The box (1) is provided with a pole post (121); The battery box also includes a battery management device (4), which includes a fiber separator (41), a battery management circuit board (42), and a cable assembly (43). The fiber separator (41) is disposed on two support plates (223), and the battery management circuit board (42) is disposed at intervals on the fiber separator (41). The battery cell assembly (3) is connected to the terminal post (121) and the battery management circuit board (42) respectively through the cable assembly (43). The battery management circuit board (42) is also connected to the terminal post (121) through the cable assembly (43).

9. The battery box according to claim 7, characterized in that, The pressure plate frame (22) is provided with a plurality of wire buckles (224), and the wire buckles (224) are arranged one by one along the length extension direction of the pressure plate (221); and or The box (1) includes a shell (11) and a cover (12). The cover (12) is placed on the shell (11), so that the box (1) and the cover (12) together enclose a storage cavity (13). The battery cell assembly (3) and the limiting assembly (2) are respectively disposed in the storage cavity (13), and the U-shaped frame (21) abuts against the inner wall surface of the storage cavity (13).

10. An energy storage system, characterized in that, The energy storage system includes a battery box as described in any one of claims 1 to 9, and the energy storage system includes a plurality of the battery boxes, each of the battery boxes being electrically connected.

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