Battery box and battery pack

Abstract

The utility model belongs to battery technical field discloses a kind of battery box and battery pack, wherein battery box includes chassis and protective cover, chassis includes bottom plate and two side plates, two side plates are protrudingly arranged at the first side of bottom plate, and two side plates are spaced apart along the first direction;Protective cover is hollowly arranged, the thickness of protective cover is less than the thickness of side plate Protective cover is arranged outside side plate and is detachably connected with bottom plate, and battery cavity for placing power core is formed between protective cover and chassis.The battery box and battery pack of the utility model, power core assembly is simple, can reduce material consumption, reduce cost.

Description

Technical Field

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

[0002] CTP (Cell to Pack) battery packs are battery pack structures that integrate battery cells directly onto the pack by eliminating intermediate modules, thereby improving the space utilization and energy density of the battery pack. In existing technologies, when installing battery cells into the casing, the lack of module assembly between cells results in loose connections between them. To prevent the cells from scattering and to ensure the support strength of the cells, a fully enclosed casing structure is usually used, along with a fully enclosed base structure to provide initial support for the cells. However, this base structure design typically requires thick side walls to ensure its structural strength, resulting in a large amount of material used and high manufacturing costs for the overall casing structure. Utility Model Content

[0003] The purpose of this utility model is to provide a battery box and battery pack that are easy to assemble with battery cells, reduce material usage and costs, and facilitate the disassembly and maintenance of electrical components.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] On the one hand, a battery box is provided, including a base frame and a protective cover. The base frame includes a base plate and two side plates. The two side plates protrude from a first side of the base plate and are spaced apart along a first direction.

[0006] The protective cover is hollow, and its thickness is less than that of the side plate. The protective cover covers the outside of the side plate and is detachably connected to the base plate. A battery cavity for placing the power supply cell is formed between the protective cover and the base frame.

[0007] In one embodiment, the battery box further includes a mounting bracket for mounting electrical components, the mounting bracket being detachably connected to the side of the protective cover opposite to the battery cavity, the protective cover having wiring openings for connecting the electrical components and for the connecting wires of the battery cells to pass through.

[0008] In one embodiment, the protective cover includes a mounting plate connected to the mounting bracket, the wiring opening is disposed on the mounting plate, the side plate includes a first side plate and a second side plate, the first side plate is disposed between the mounting plate and the second side plate, a wiring cavity is formed between the mounting plate and the first side plate at a distance, and the end of the first side plate away from the base plate is spaced apart from the protective cover so that the wiring cavity communicates with the battery cavity.

[0009] In one embodiment, the first side plate is provided with a mounting groove for inserting an aluminum busbar fixing seat. The mounting groove is located at the end of the first side plate away from the base plate or at the end of the first side plate facing the wiring cavity.

[0010] In one embodiment, the battery box further includes a connecting assembly, through which the two side plates are connected, the connecting assembly being spaced apart from the base plate along a second direction, the second direction being at an angle to the first direction.

[0011] In one embodiment, the connecting component includes two first connectors spaced apart along a third direction. The two first connectors are respectively connected to the two ends of the two side plates along the third direction. Any two of the first direction, the second direction, and the third direction are perpendicular to each other.

[0012] In one embodiment, the connecting assembly further includes at least one second connector disposed between the two first connectors along the third direction, and the two ends of the second connector along the first direction are respectively connected to the two side plates.

[0013] In one embodiment, the second connector includes a connecting plate and a fixing plate connected at an angle. The side plate is provided with a slot for inserting the connecting plate. The slot passes through the side plate along the first direction and passes through the end of the side plate away from the bottom plate along the second direction. The side plate is provided with a first fixing hole on at least one side of the slot. The fixing plate is located on the outside of the side plate, and the fixing plate is provided with a second fixing hole at the position corresponding to the first fixing hole.

[0014] In one embodiment, the side plate includes two spaced-apart plates with a plurality of ribs between them, and adjacent ribs are arranged at an angle to each other.

[0015] In one embodiment, the base frame further includes a frame surrounding the edge of the base plate, the frame protruding from a first side of the base plate, the height of the frame protruding from the base plate being less than the height of the side plate protruding from the base plate.

[0016] In one embodiment, the top of the frame is provided with a plurality of mounting holes, and the bottom of the protective cover is provided with a plurality of mounting holes, each corresponding to one of the mounting holes; and / or,

[0017] The side of the frame is provided with several functional structures, including weight reduction grooves and / or lifting grooves.

[0018] In one embodiment, the battery box further includes a sealing strip disposed between the bottom of the frame and the bottom of the protective cover. The sealing strip has a plurality of clearance holes that correspond one-to-one with the mounting holes, and the central axis of the clearance holes coincides with the central axis of the mounting holes.

[0019] In one embodiment, the base plate is further provided with a flow channel for the cooling medium to circulate, and the base plate is also provided with an inlet and an outlet communicating with the flow channel.

[0020] In one embodiment, the protective cover has a top plate away from the base plate, and the top plate is provided with a reinforcing structure.

[0021] In one embodiment, the battery box further includes an electrical housing that is detachably connected to the protective cover and covers the outside of the mounting bracket.

[0022] On the other hand, a battery pack is also provided, including at least one set of battery packs, several electrical components, connecting wires and the aforementioned battery box. Each set of battery packs includes multiple battery cells, which are arranged along the first direction and placed in the battery cavity. The bottom of each battery cell is bonded and fixed to the base plate by structural adhesive, and the two expansion surfaces of each battery cell are arranged opposite to each other along the first direction.

[0023] A mounting bracket is installed on the side of the protective cover away from the battery cavity. The electrical component is detachably mounted on the mounting bracket. One end of the connecting wire is connected to the electrical component. The protective cover is also provided with a wiring opening. The other end of the connecting wire passes through the wiring opening and extends into the battery cavity to connect with the battery cell.

[0024] In one embodiment, a busbar support is connected to the top of the battery cell, the aluminum busbar mounting base of the busbar support is connected to the base frame, and the busbar support is connected to the electrical component through the connecting line.

[0025] In one embodiment, the battery pack further includes an insulating partition disposed between the busbar support and the protective cover.

[0026] The beneficial effects of this utility model are:

[0027] This utility model discloses a battery box with a base frame structure formed by a base plate and two side plates spaced apart along a first direction. Compared to traditional all-around enclosed boxes, this eliminates the need for two side plates, effectively reducing material usage and manufacturing costs. The battery cells are bonded to the base frame using structural adhesive. Before the adhesive fully cures, the two opposing side plates provide pre-support for the cells, eliminating the need to fix the batteries into modules using steel bars and fixing plates, thus simplifying the base frame structure and cell installation process. A protective cover is then placed on the outside of the base frame, and the cell covers are placed inside the battery cavity, providing protection for the cells and further enhancing the support strength for the cells and the overall strength of the battery box.

[0028] Furthermore, in this invention, the thickness of the protective cover is less than the thickness of the side plates, so that the overall battery box structure, compared to the traditional all-around thick-walled battery box structure, reduces material usage and lowers costs while ensuring overall structural strength. Specifically, the base plate and side plates mainly provide support for the battery cell 1, while the protective cover mainly seals and protects the battery cell and provides some auxiliary support to prevent the battery cell from loosening or shifting, thereby improving the overall strength of the battery box to a certain extent and ensuring that the overall strength of the battery box meets the design requirements. Attached Figure Description

[0029] Figure 1 This is an exploded view of the battery box in one embodiment;

[0030] Figure 2 This is a schematic diagram of the base frame in one embodiment;

[0031] Figure 3 yes Figure 2 Enlarged structural diagram of section A in the middle;

[0032] Figure 4 yes Figure 2 Enlarged structural diagram of section B in the middle;

[0033] Figure 5 This is a schematic diagram of the structure of the second connector in one embodiment;

[0034] Figure 6 This is a schematic diagram of the structure of the second side of the base plate in one embodiment;

[0035] Figure 7 This is an exploded view of the battery pack in one embodiment.

[0036] In the picture:

[0037] 1. Battery cell; 2. Electrical component; 3. Connecting wire; 4. Busbar support; 41. Aluminum busbar fixing base; 5. Insulating partition; 51. Insulating plate;

[0038] 100. Base frame; 110. Base plate; 111. First side panel; 112. Second side panel; 113. Protrusion; 114. Groove; 115. Inlet; 116. Outlet; 120. Side panel; 1201. First side panel; 1202. Second side panel; 121. Mounting groove; 122. Slot; 123. First fixing hole; 124. Plate; 125. Rib; 130. Frame; 131. Mounting hole seat; 132. Weight reduction groove; 133. Lifting groove; 14 0. Sealing plate; 200. Protective cover; 210. Wiring opening; 220. Mounting plate; 230. Top plate; 231. Embossing structure; 240. Mounting hole; 300. Mounting bracket; 400. Battery cavity; 500. Wiring cavity; 600. Connecting assembly; 610. First connector; 620. Second connector; 621. Connecting plate; 622. Fixing plate; 6221. Second fixing hole; 700. Sealing strip; 710. Clearance hole; 800. Electrical housing. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] like Figures 1 to 6 As shown, a battery box according to this embodiment includes a base frame 100 and a protective cover 200. The base frame 100 includes a base plate 110 and two side plates 120. The two side plates 120 protrude from the first side 111 of the base plate 110 and are spaced apart along a first direction. The protective cover 200 is hollow and its thickness is less than that of the side plates 120. The protective cover 200 covers the outside of the side plates 110 and is detachably connected to the base plate 120. A battery cavity 400 for placing the power supply core 1 is formed between the protective cover 200 and the base frame 100.

[0044] In this embodiment, the base frame 100 is formed by the base plate 110 and two side plates 120 spaced apart along the first direction on the base plate 110. Compared with the traditional all-around enclosed box, the two side plates 120 are eliminated, effectively reducing material usage and manufacturing costs. The battery cell 1 is bonded to the base frame 100 with structural adhesive. Before the structural adhesive fully cures, the two opposing side plates 120 provide pre-support for the battery cell 1, eliminating the need to fix the battery into a module using steel bars and fixing plates 622, thus simplifying the structure of the base frame 100 and the battery cell 1 installation process. Then, a protective cover 200 is placed over the outside of the base frame 100, and the battery cell 1 is enclosed within the battery cavity 400, which helps protect the battery cell 1 and further improves the support strength for the battery cell 1 and the overall strength of the battery box through the protective cover 200.

[0045] Furthermore, the sidewall thickness of the protective cover 200 is less than the thickness of the side plate 120. This allows the battery box in this embodiment to reduce material usage and lower costs compared to traditional battery box structures with thick walls and surrounding walls, while maintaining overall structural strength. In the battery box structure of this embodiment, the base plate 110 and side plates 120 mainly support the battery cell 1. The protective cover 200 is mainly used to seal and protect the battery cell 1 and provide some auxiliary support to prevent the battery cell 1 from loosening or shifting. This, in turn, improves the overall strength of the battery box to a certain extent and ensures that the overall strength of the battery box meets the design requirements.

[0046] In one embodiment, the battery box further includes a mounting bracket 300 for mounting electrical components 2. The mounting bracket 300 is detachably connected to the side of the protective cover 200 away from the battery cavity 400. The electrical components 2 are connected to the battery cell 1 via connecting wires 3. The protective cover 200 has a wiring opening 210 for the connecting wires 3 to pass through. By using the mounting bracket 300 detachably mounted on the outside of the protective cover 200, the electrical components 2 and the battery box are separated into two separate modules. Therefore, during the disassembly and assembly of the electrical components 2, no disassembly or assembly operations are required on the battery box or the battery cell 1, which helps to protect the integrity of the battery box and the battery cell 1 and helps to avoid damage to the battery box or the battery cell 1 during disassembly and assembly.

[0047] In one embodiment, the protective cover 200 includes a mounting plate 220 connected to the mounting bracket 300. A wiring opening 210 is disposed on the mounting plate 220. The side plate 120 includes a first side plate 1201 and a second side plate 1202. The first side plate 1201 is disposed between the mounting plate 220 and the second side plate 1202. A wiring cavity 500 is formed between the mounting plate 220 and the first side plate 1201 at a distance. The end of the first side plate 1201 away from the bottom plate 110 is spaced apart from the protective cover 200 so that the wiring cavity 500 communicates with the battery cavity 400. One end of the connecting wire 3 is connected to the electrical component 2 on the mounting bracket 300. The other end of the connecting wire 3 passes sequentially through the wiring opening 210, the wiring cavity 500, and the gap between the first side plate 1201 and the protective cover 200, and extends into the battery cavity 400 to connect with the battery cell 1. The wiring cavity 500 is used for the routing and wiring of the connecting line 3, so that the connecting line 3 has a separate space for wiring, avoiding messy wiring layout, facilitating the disassembly and assembly of corresponding lines during subsequent maintenance, and making full use of space.

[0048] In one embodiment, the first side plate 1201 is provided with a mounting groove 121 for inserting the aluminum busbar fixing seat 41. The mounting groove 121 is located at the end of the first side plate 1201 away from the bottom plate 110 or at the end of the first side plate 1201 facing the wiring cavity 500, which facilitates the installation and removal of the aluminum busbar fixing seat 41 and avoids the aluminum busbar fixing seat 41 occupying space in the battery cavity 400. In this embodiment, by providing a mounting groove 121 on the side plate 120 for inserting the aluminum busbar fixing seat 41, it is not necessary to pre-set a corresponding installation position on the busbar bracket 4, which reduces the manufacturing process and installation steps of the busbar bracket 4, making the operation simple and convenient, and also helps to save space in the battery cavity 400.

[0049] In one embodiment, the protective cover 200 has a top plate 230 located away from the base plate 110, and the top plate 230 is provided with a reinforcing structure, specifically, such as... Figure 1As shown, in this embodiment, the reinforcing structure is configured as a concave structure 231, which creates a reinforcing rib effect on the top plate 230, effectively enhancing the bending stiffness of the top plate 230, thereby increasing the overall structural strength of the protective cover 200 and further improving the structural strength of the battery box. Of course, in actual operation, other reinforcing structures can also be used, such as setting several protruding ribs on the top plate 230, or welding several steel bars onto the top plate 230, etc., as long as the reinforcing structure of the top plate 230 can be improved, such designs are all within the protection scope of this utility model.

[0050] In one embodiment, the battery box further includes a connecting assembly 600, through which the two side plates 120 are connected. The connecting assembly 600 and the base plate 110 are spaced apart along a second direction, which forms an angle with the first direction. Specifically, the second direction is perpendicular to the first direction. By connecting and fixing the two side plates 120 together through the connecting assembly 600, the supporting force of the two side plates 120 on the battery cell 1 placed between the two side plates 120 is further improved, and the material used in the connecting assembly 600 is minimized while ensuring sufficient supporting force.

[0051] In one embodiment, the connecting assembly 600 includes two first connecting members 610 spaced apart along a third direction. The two first connecting members 610 are respectively connected to the two ends of the two side plates 120 along the third direction to ensure a stable connection and connection strength between the two side plates 120. Any two of the first direction, second direction, and third direction are perpendicular to each other. Specifically, the first connecting members 610 can be steel bars or steel plates. The two ends of the steel bars or steel plates are connected to the two side plates 120 by fasteners such as bolts or screws, or by welding, as long as a stable connection between the two side plates 120 is ensured. Such designs are within the protection scope of this utility model.

[0052] In one embodiment, the connecting assembly 600 further includes at least one second connector 620 disposed between two first connectors 610 along a third direction. The two ends of the second connector 620 along the first direction are respectively connected to two side plates 120 to further improve the connection strength between the two side plates 120, thereby improving the strength of the overall structure.

[0053] Specifically, the second connector 620 includes a connecting plate 621 and a fixing plate 622 connected at an angle. Two fixing plates 622 are provided, one at each end of the connecting plate 621, and each fixing plate 622 is fixedly connected to a side plate 120 on the corresponding side. Specifically, the side plate 120 has a slot 122 for inserting the connecting plate 621. The slot 122 penetrates the side plate 120 along a first direction and also penetrates the end of the side plate 120 away from the base plate 110 along a second direction. A first fixing hole 123 is provided on at least one side of the side plate 122, and the fixing plate 622 is located outside the side plate 120. A second fixing hole 6221 is provided on the fixing plate 622 corresponding to the first fixing hole 123. The fixing plate 622 and the side plate 120 are fixedly connected by fasteners such as bolts or screws passing through the first fixing hole 123 and the second fixing hole 6221, respectively.

[0054] In one embodiment, the side plate 120 includes two spaced-apart plates 124, with a plurality of ribs 125 disposed between the two plates 124 to improve the overall structural strength of the side plate 120. Furthermore, adjacent ribs 125 are arranged at an angle to each other, and the staggered arrangement of the ribs 125 further enhances the structural strength of the side plate 120, thereby increasing the support strength of the side plate 120 for the battery cell 1 and ensuring the stability of the overall battery box.

[0055] In one embodiment, the base frame 100 further includes a frame 130 surrounding the edge of the base plate 110. The frame 130 protrudes from the first side 111 of the base plate 110, thereby providing a certain support for the battery cell 1 installed in the battery cavity 400 and improving the initial support force of the base frame 100 for the battery cell 1. The height of the frame 130 protruding from the base plate 110 is less than the height of the side plate 120 protruding from the base plate 110. In actual operation, the height of the frame 130 protruding from the base plate 110 is much smaller than the height of the side plate 120 protruding from the base plate 110. Under the premise of ensuring the overall structural strength of the base frame 100, the amount of material used in the base frame 100 is reduced as much as possible, thus saving costs.

[0056] In one embodiment, the top of the frame 130 is provided with multiple mounting holes 131, and the bottom of the protective cover 200 is provided with multiple mounting holes 240 corresponding one-to-one with the mounting holes 131, so that fasteners such as bolts or screws can pass through the mounting holes 240 and connect to the mounting holes 131, thereby achieving a fixed connection between the protective cover 200 and the base frame 100. And / or, the sides of the frame 130 are provided with several functional structures, including weight-reduction grooves 132 and / or lifting grooves 133. The weight-reduction grooves 132 allow the frame 130 to minimize material usage, reduce costs, and lower the overall weight of the battery box while maintaining overall structural strength. The lifting grooves 133 on the frame 130 allow for direct connection with external lifting equipment to lift the battery box, facilitating its transportation.

[0057] In one embodiment, the battery box further includes a sealing strip 700, which is disposed between the bottom of the frame 130 and the bottom of the protective cover 200. The sealing strip 700 has a plurality of clearance holes 710 that correspond one-to-one with the mounting holes 240. Fasteners such as bolts or screws pass through the mounting holes 240 and clearance holes 710 respectively and are connected to the mounting hole seat 131 to fix the sealing strip 700 between the frame 130 and the protective cover 200, thereby improving the sealing performance of the direct connection between the frame 130 and the protective cover 200, and thus improving the overall sealing performance of the battery box.

[0058] In one embodiment, the base plate 110 is further provided with a flow channel (not shown in the figure) for the flow of cooling medium. The base plate 110 is also provided with an inlet 115 and an outlet 116 communicating with the flow channel. By circulating cooling medium into the flow channel in the base plate 110, the base plate 110 is used as a cold plate to cool and reduce the temperature of the battery cell 1.

[0059] Specifically, the base plate 110 also includes a second side 112 disposed opposite to the first side 111. The second side 112 has multiple protrusions 113, with grooves 114 formed between adjacent protrusions 113. The base plate 110 has an inlet 115 and an outlet 116 communicating with the grooves 114. The base frame 100 also includes a sealing plate 140, which abuts against the protrusions 113 and is spaced apart from the grooves 114 to form a flow channel. Specifically, coolant enters the flow channel through the inlet 115, flows along the flow channel, and finally exits from the outlet 116. By flowing within the flow channel, the coolant exchanges heat with the battery cell 1 through the plate body, achieving the effect of cooling the battery cell 1. In this embodiment, the protrusions 113 and the plate body are integrally formed by die casting, which helps to ensure the height consistency of each part of the protrusions 113. That is, when the base plate 110 and the protrusions 113 are installed in contact, the base plate 110 and each part of the protrusions 113 can be tightly contacted, ensuring that there is no cross-flow phenomenon between the flow channels formed between the base plate 110 and the groove 114.

[0060] In one embodiment, the battery box also includes an electrical housing 800, which is detachably connected to the protective cover 200 and covers the outside of the mounting bracket 300. The electrical housing 800 is used to protect and seal the electrical components 2, preventing the electrical components 2 from being damaged by the external environment.

[0061] On the other hand, such as Figure 7 As shown, this embodiment also provides a battery pack, including at least one battery pack, several electrical components 2, connecting wires 3, and the aforementioned battery box. Each battery pack includes multiple battery cells 1, which are arranged along a first direction and placed inside the battery cavity 400. The bottom of the battery cell 1 is bonded to the base plate 110 with structural adhesive, and the two expansion surfaces of the battery cell 1 are arranged opposite each other along the first direction. A mounting bracket 300 is installed on the side of the protective cover 200 away from the battery cavity 400. The electrical components 2 are detachably mounted on the mounting bracket 300. One end of the connecting wire 3 is connected to the electrical component 2. The protective cover 200 is also provided with a wiring opening 210, and the other end of the connecting wire 3 passes through the wiring opening 210 and extends into the battery cavity 400 to connect with the battery cell 1.

[0062] Among them, the two largest surfaces of cell 1 are expansion surfaces. No additional connecting parts are needed between cells 1 in each battery pack. The entire battery pack is directly installed on the base frame 100. At this time, the two expansion surfaces of cell 1 face the two side plates 120 respectively. The two side plates 120 support the expansion surfaces of cell 1 at both ends, ensuring that the side plates 120 can resist the initial expansion force required by cell 1, preventing cell 1 in each battery pack from falling apart, and can resist the expansion deformation of cell 1 at the end of its life, thus improving the overall operational safety of the battery pack.

[0063] In one embodiment, a busbar bracket 4 is connected to the top of the battery cell 1. The busbar bracket 4 is connected to the base frame 100 via an aluminum busbar fixing seat 41. The aluminum busbar fixing seat 41 is connected to the mounting groove 121 on the side plate 120. The busbar bracket 4 is connected to the electrical component 2 via a connecting wire 3.

[0064] Furthermore, the battery pack also includes an insulating partition 5, which is disposed between the busbar support 4 and the protective cover 200 to achieve insulation between the protective cover 200 and the busbar support 4. In actual operation, in order to make the overall structure of the battery pack compact, the side of the busbar support 4 is close to the side wall of the protective cover 200. Therefore, by providing insulator plates 51 protruding from both ends of the insulating partition 5 along the second direction towards the side of the busbar support 4, the isolation and insulation between the protective cover 200 and the busbar support 4 is further achieved. Furthermore, the length of the insulator plates 51 extending along the second direction is greater than or equal to the thickness of the busbar support 4, thereby completely isolating the busbar support 4 from contact with the side wall of the protective cover 200 from the side, further improving the overall safety of the battery pack.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery box, characterized in that, include: The base frame (100) includes a base plate (110) and two side plates (120). The two side plates (120) protrude from the first side (111) of the base plate (110) and are spaced apart along a first direction. A protective cover (200) is hollow and its thickness is less than that of the side plate (120). The protective cover (200) covers the outside of the side plate (120) and is detachably connected to the base plate (110). A battery cavity (400) for placing the power supply core (1) is formed between the protective cover (200) and the base frame (100).

2. The battery box according to claim 1, characterized in that, It also includes a mounting bracket (300) for mounting electrical components (2), the mounting bracket (300) being detachably connected to the side of the protective cover (200) away from the battery cavity (400), the protective cover (200) having a wiring opening (210) for the connecting wire (3) connecting the electrical components (2) and the battery cell (1) to pass through.

3. The battery box according to claim 2, characterized in that, The protective cover (200) includes a mounting plate (220) connected to the mounting bracket (300), the wiring opening (210) is disposed on the mounting plate (220), the side plate (120) includes a first side plate (1201) and a second side plate (1202), the first side plate (1201) is disposed between the mounting plate (220) and the second side plate (1202), a wiring cavity (500) is formed between the mounting plate (220) and the first side plate (1201) at a distance, and the end of the first side plate (1201) away from the base plate (110) is spaced apart from the protective cover (200) so that the wiring cavity (500) communicates with the battery cavity (400).

4. The battery box according to claim 3, characterized in that, The first side plate (1201) is provided with a mounting groove (121) for inserting the aluminum busbar fixing seat (41). The mounting groove (121) is located at one end of the first side plate (1201) away from the bottom plate (110) or at one end of the first side plate (1201) facing the wiring cavity (500).

5. The battery box according to any one of claims 1 to 4, characterized in that, It also includes a connecting component (600), through which the two side plates (120) are connected. The connecting component (600) and the base plate (110) are spaced apart along a second direction, which is at an angle to the first direction.

6. The battery box according to claim 5, characterized in that, The connecting assembly (600) includes two first connectors (610) spaced apart along a third direction. The two first connectors (610) are respectively connected to the two ends of the two side plates (120) along the third direction. Any two of the first direction, the second direction and the third direction are perpendicular to each other.

7. The battery box according to claim 6, characterized in that, The connecting assembly (600) further includes at least one second connector (620), which is disposed between the two first connectors (610) along the third direction, and the two ends of the second connector (620) along the first direction are respectively connected to the two side plates (120).

8. The battery box according to claim 7, characterized in that, The second connector (620) includes a connecting plate (621) and a fixing plate (622) connected at an angle. The side plate (120) is provided with a slot (122) for the connecting plate (621) to be inserted. The slot (122) passes through the side plate (120) along the first direction and passes through the end of the side plate (120) away from the bottom plate (110) along the second direction. The side plate (120) is provided with a first fixing hole (123) on at least one side of the slot (122). The fixing plate (622) is located on the outside of the side plate (120). The fixing plate (622) is provided with a second fixing hole (6221) corresponding to the position of the first fixing hole (123).

9. The battery box according to any one of claims 1 to 4, characterized in that, The side plate (120) includes two spaced plates (124), and a plurality of ribs (125) are provided between the two plates (124), with adjacent ribs (125) arranged at an angle to each other.

10. The battery box according to any one of claims 1 to 4, characterized in that, The base frame (100) also includes a frame (130) surrounding the edge of the base plate (110), the frame (130) protruding from the first side (111) of the base plate (110), the height of the frame (130) protruding from the base plate (110) being less than the height of the side plate (120) protruding from the base plate (110).

11. The battery box according to claim 10, characterized in that, The top of the frame (130) is provided with a plurality of mounting holes (131), and the bottom of the protective cover (200) is provided with a plurality of mounting holes (240) corresponding one-to-one with the mounting holes (131); and / or, The side of the frame (130) is provided with several functional structures, including a weight reduction groove (132) and / or a hoisting groove (133).

12. The battery box according to claim 11, characterized in that, It also includes a sealing strip (700), which is disposed between the bottom of the frame (130) and the bottom of the protective cover (200). The sealing strip (700) is provided with a plurality of clearance holes (710) that correspond one-to-one with the mounting holes (240).

13. The battery box according to any one of claims 1 to 4, characterized in that, The base plate (110) is also provided with a flow channel for the cooling medium to circulate, and the base plate (110) is also provided with an inlet (115) and an outlet (116) communicating with the flow channel.

14. The battery box according to any one of claims 1 to 4, characterized in that, The protective cover (200) has a top plate (230) away from the bottom plate (110), and the top plate (230) is provided with a reinforcing structure (231).

15. The battery box according to any one of claims 2 to 4, characterized in that, It also includes an electrical housing (800), which is detachably connected to the protective cover (200) and covers the outside of the mounting bracket (300).

16. A battery pack, characterized in that, The battery pack includes at least one battery pack, several electrical components (2), connecting wires (3), and a battery box as described in any one of claims 1 to 15. Each battery pack includes multiple battery cells (1), which are arranged in the battery cavity (400) along the first direction. The bottom of each battery cell (1) is bonded to the base plate (110) with structural adhesive. The two expansion surfaces of each battery cell (1) are arranged opposite to each other along the first direction. The protective cover (200) has a mounting bracket (300) installed on the side away from the battery cavity (400). The electrical component (2) is detachably mounted on the mounting bracket (300). One end of the connecting wire (3) is connected to the electrical component (2). The protective cover (200) is also provided with a wiring opening (210). The other end of the connecting wire (3) passes through the wiring opening (210) and extends into the battery cavity (400) to connect with the battery cell (1).

17. The battery pack according to claim 16, characterized in that, The top of the battery cell (1) is connected to a busbar bracket (4), which is connected to the base frame (100) via an aluminum busbar fixing seat (41). The busbar bracket (4) is connected to the electrical component (2) via the connecting line (3).

18. The battery pack according to claim 17, characterized in that, It also includes an insulating partition (5), which is disposed between the busbar support (4) and the protective cover (200).

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