Battery box

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery box. The battery box comprises a box body, a plurality of heat insulation beams, a plurality of battery cell units and a heat dissipation assembly, the top of the box body is open, a cooling piece is arranged at the bottom of the box body, and the heat insulation beams are arranged in the box body at intervals in the first direction so as to divide the space in the box body into a plurality of independent mounting cavities; each battery cell unit is arranged in one mounting cavity and abuts against the cooling piece, each battery cell unit comprises at least one battery cell body, each battery cell body comprises a battery cell shell and a soft package battery cell arranged in the battery cell shell, and the heat dissipation assembly is connected to the box body and abuts against the side, away from the cooling piece, of the battery cell shell. According to the battery box, the soft package battery cells can be quickly cooled, the temperature difference between the soft package battery cells can be reduced, the thermal runaway of the soft package battery cells can be controlled within a specified range, and the thermal runaway phenomenon is prevented from spreading.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery box. Background Art

[0002] As the sales and ownership of electric vehicles increase, electric vehicle power batteries, as core components, have increasingly higher requirements for thermal safety and grouping rate. Since soft-pack batteries do not have the structural shell of square or cylindrical batteries, they can often only be grouped into battery modules, and then the entire battery module is installed in the battery box. Specifically, multiple soft-pack batteries are fixed into modules through a top plate, a bottom plate, two end plates, two side plates and cable ties, namely a CTM structure (Cell to Module), and then the CTM structure is installed in the battery box. Since the high-temperature gas eruption after the thermal runaway of the soft-pack battery is triggered is disordered, when a soft-pack battery has thermal runaway, it is very easy to cause the thermal runaway to spread to other soft-pack batteries, thereby causing the power battery to burn or even explode; at the same time, when ultra-fast charging battery packs are used, it is found that the battery generates huge heat in the ultra-fast charging scenario, and the existing power battery has a slow heat dissipation speed for the soft-pack batteries, and it is easy to cause uneven battery cell temperature. Utility Model Content

[0003] The utility model aims to provide a battery box, which can not only quickly cool soft-pack battery cells and reduce the temperature difference between the soft-pack battery cells, but also control the thermal runaway of the soft-pack battery cells within a specified range to avoid the spread of the thermal runaway phenomenon.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a battery box, comprising: a box body, the top of the box body is open and the bottom is provided with a cooling member; a plurality of heat-insulating beams, the plurality of heat-insulating beams are arranged in the box body at intervals to divide the space in the box body into a plurality of independent installation cavities; a plurality of battery cell units, each of the battery cell units is arranged in one of the installation cavities and stops at the cooling member, each of the battery cell units includes at least one battery cell body, each of the battery cell body includes a battery cell shell and a soft-pack battery cell arranged in the battery cell shell; a heat dissipation component, the heat dissipation component is connected to the box body, and the heat dissipation component stops at a side of the battery cell shell away from the cooling member.

[0006] In some embodiments, the battery cell shell is openly disposed toward one side of the cooling element, and the side of the soft-pack battery cell away from the heat dissipation component abuts against the cooling element; or:

[0007] Two oppositely disposed sides of the battery core shell are respectively stopped at the cooling member and the heat dissipation assembly.

[0008] In some embodiments, the two side walls of each battery cell unit that are arranged opposite to each other both stop at the heat insulation beam. In some specific embodiments, each battery cell unit includes a plurality of battery cell bodies, and each battery cell unit also includes a battery cell busbar, which is used to realize the electrical connection of the plurality of battery cell bodies; the battery box also includes an inter-group busbar, which is used to realize the electrical connection of the battery cell units in two adjacent installation cavities.

[0009] In some specific embodiments, the accommodating cavity is open toward one side of the cooling member, and the soft-pack battery cell abuts against the cooling member.

[0010] In some embodiments, the heat dissipation assembly includes a heat dissipation element, the heat dissipation element is connected to the box body, and the heat dissipation element abuts against a side of the battery cell unit facing away from the cooling element.

[0011] In some specific embodiments, the heat dissipation assembly further includes a thermally conductive adhesive layer, and the thermally conductive adhesive layer is bonded between the heat dissipation element and a side of the battery cell unit away from the cooling element.

[0012] In some specific embodiments, there are multiple heat sinks, each of which is extended along the first direction, and multiple heat sinks are spaced apart along the second direction.

[0013] In some embodiments, the thermal insulation beam includes a partition and two mounting plates, the two mounting plates are located on both sides of the partition along the second direction, the partition stops at the cooling member, and the two mounting plates are respectively connected to the two inner walls of the box body.

[0014] In some specific embodiments, a first mounting hole is provided on the mounting plate, a second mounting hole is provided on the inner wall of the box body, and a connecting member passes through the first mounting hole and is connected to the second mounting hole to connect the mounting plate to the inner wall of the box body.

[0015] In some specific embodiments, each of the mounting plates is connected to the inner wall of the box body via a plurality of connectors, and the plurality of connectors are divided into two groups, and the two groups of connectors are respectively located on both sides of the partition along the first direction.

[0016] The beneficial effects of the battery box of the utility model are:

[0017] The battery box of the utility model uses the battery cell shell as a heat-conducting structure and hardens the soft-pack battery cell at the same time, so that the battery cell unit can directly abut against the heat dissipation component for heat dissipation and ensure strength. The cooling parts, heat-insulating beams, battery cell shells and heat-insulating components of the box body wrap the soft-pack battery cell, and the heat of the soft-pack battery cell can be quickly discharged, reducing the temperature difference between the battery cell units, and greatly improving the structural strength of the CTP structure of the soft-pack battery cell. On the other hand, compared with the CTM structure in the prior art, since the space in the box body of this embodiment is divided into multiple installation cavities by multiple heat-insulating beams, each installation cavity is provided with a battery cell unit, and it is not necessary to put all the soft-pack batteries into the box body after forming a battery module through end plates, side plates, top plates, bottom plates and cable ties as in the prior art, which simplifies the structure of the entire battery box, and the multiple battery cell units in the CTP structure in the battery box of this embodiment do not contact each other, and the thermal runaway of the battery cell unit is controlled in one installation cavity, avoiding the spread of the thermal runaway phenomenon and improving the safety performance of the battery box.

[0018] In addition, the box body, thermal insulation beams and heat dissipation components form a cage-type structure for the entire battery box. Installing the battery cell units into the cage-type structure can improve the structural strength of the entire battery box and reduce the degree of deformation of the battery box.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a battery box according to an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 The enlarged schematic diagram of the circled A;

[0022] Figure 3 It is a structural schematic diagram of a battery cell unit according to an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the battery cell body of an embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the exploded structure of the battery cell body of an embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the battery box of the embodiment of the utility model with the heat dissipation assembly removed;

[0026] Figure 7 yes Figure 6 The enlarged schematic diagram of the circled B;

[0027] Figure 8This is a schematic diagram of the connection structure between the box body and the insulation beam of the embodiment of the utility model;

[0028] Fig. 9 yes Figure 8 The enlarged schematic diagram of the circled C;

[0029] Fig.10 yes Figure 8 a schematic diagram of the exploded structure of the structure shown;

[0030] Fig.11 It is a schematic diagram of the exploded structure of the battery box of the embodiment of the utility model;

[0031] Reference numerals:

[0032] 100, box body; 110, cooling element; 120, supporting beam;

[0033] 200, insulation beam; 210, partition; 220, mounting plate;

[0034] 300, battery cell unit; 310, battery cell body; 311, battery cell shell; 312, soft-pack battery cell; 320, battery cell busbar;

[0035] 400, heat dissipation component; 410, heat dissipation element; 411, heat dissipation fin; 420, thermal conductive adhesive layer

[0036] 500, inter-group busbar; 600, connecting piece; 700, first fixing piece; 800, second fixing piece. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Embodiment 1:

[0042] The utility model discloses a battery box, referring to Figure 1 , Figure 7 and Fig.10 As shown, the battery box of this embodiment includes a box body 100, a plurality of thermal insulation beams 200, a plurality of battery cell units 300 and a heat dissipation assembly 400. The top of the box body 100 is open, and a cooling member 110 is provided at the bottom. The plurality of thermal insulation beams 200 are arranged in the box body 100 at intervals along a first direction to divide the space in the box body 100 into a plurality of independent installation cavities. Each battery cell unit 300 is arranged in an installation cavity and stops at the cooling member 110. Each battery cell unit 300 includes at least one battery cell body 310. Each battery cell body 310 includes a battery cell shell 311 and a soft-pack battery cell 312 arranged in the battery cell shell 311. The heat dissipation assembly 400 is connected to the box body 100, and the heat dissipation assembly 400 stops at a side of the battery cell shell 311 away from the cooling member 110.

[0043] It can be understood that since each battery cell body 310 includes a battery cell shell 311 and a soft-pack battery cell 312, the soft-pack battery cell 312 is installed in the battery cell shell 311. On the one hand, the battery cell shell 311 can be used as a heat-conducting structure to quickly conduct the heat of the soft-pack battery cell 312 to the heat dissipation component 400 and the cooling component 110. The cooling component of the box body 100, the insulation beam 200, the battery cell shell 311 and the heat dissipation component 400 wrap the soft-pack battery cell 312, which greatly improves the heat dissipation performance and enables the soft-pack battery cell 312 to be quickly cooled, thereby reducing the probability of thermal runaway of the battery cell unit 300, reducing the temperature difference between the battery cell units 300, and ensuring the working reliability of the battery box. At the same time, the battery cell shell 311 hardens the soft-pack battery cell 312, so that the battery cell unit 300 can directly abut against the heat dissipation component 400 for heat dissipation and ensure strength, thereby improving the structural strength of the soft-pack battery CTP structure. On the other hand, compared with the CTM structure in the prior art, since the space in the box body 100 of this embodiment is divided into multiple installation cavities by multiple insulation beams 200, and each installation cavity is provided with a battery cell unit 300, there is no need to put all the soft-pack battery cells into the box body after forming a battery module through end plates, side plates, top plates, bottom plates and cable ties as in the prior art, which simplifies the structure of the entire battery box. In addition, the multiple battery cell units 300 in the CTP structure of this embodiment do not contact each other, and the thermal runaway of the battery cell unit 300 can be controlled in one installation cavity, thereby avoiding the spread of thermal runaway and improving the safety performance of the battery box.

[0044] In addition, the soft-pack battery cell 312 is hardened through the battery cell shell 311 and then connected to the thermal insulation beam 200, so that the force exerted by the soft-pack battery cell on the cooling element 110 is transferred to the thermal insulation beam 200, and then transferred to the box body 100 using the thermal insulation beam 200, thereby reducing the load-bearing capacity of the cooling element 110, increasing the service life of the cooling element 110, and avoiding leakage or deformation.

[0045] It should be noted that the box body 100, the insulation beam 200 and the heat dissipation assembly 400 form a cage-type structure for the entire battery box. Installing the battery cell unit 300 into the cage-type structure can improve the structural strength of the entire battery box and reduce the degree of deformation of the battery box.

[0046] Optionally, two oppositely disposed side walls of the battery cell unit 300 are respectively abutted against the thermal insulation beam 200. It is understandable that the side walls of the battery cell unit 300 abut against the thermal insulation beam 200, which can ensure the stability of the battery cell unit 300 in the installation cavity and prevent the battery cell unit 300 from shaking in the installation cavity. On the other hand, the thermal insulation beam 200 transmits the gravity of the battery cell unit 300 to the side wall of the box body 100 through the battery cell unit 300 and the abutting surface, so that each thermal insulation beam 200 becomes a reinforcing beam of the box body 100, which is beneficial to improve the strength of the battery box and reduce the deformation of the battery box.

[0047] Optionally, the cooling member 110 is a liquid cooling plate, and the structure of the liquid cooling plate is known in the prior art, and the structure of the liquid cooling plate is not specifically limited herein.

[0048] refer to Figure 3 and Figure 4 As shown, the battery cell shell 311 has a accommodating cavity, the soft-pack battery cell 312 is installed in the battery cell shell 311, and the two ends of the soft-pack battery cell 312 along the second direction extend out of the accommodating cavity. It can be understood that installing the soft-pack battery cell 312 in the battery cell shell 311 can protect the soft-pack battery cell 312 and improve the strength of the entire battery cell body 310, thereby ensuring that the soft-pack battery cell 312 is not damaged due to excessive external force after the battery cell unit 300 is packed. The two ends of the soft-pack battery cell 312 along the second direction extend out of the accommodating cavity. Since the two ends of the soft-pack battery cell 312 along the second direction are usually provided with pole ears, the pole ears are extended out of the accommodating cavity to facilitate the connection using a bus structure to achieve electrical connection between the two battery cell bodies 310.

[0049] Optional, reference Figure 3 As shown, each battery cell unit 300 includes two battery cell bodies 310, and each battery cell unit 300 also includes a battery cell bus 320, which is used to achieve electrical connection between the two battery cell bodies 310. It can be understood that the provision of two battery cell bodies 310 in each battery cell unit 300 can increase the capacity of the battery cell unit 300, thereby helping to increase the energy density of the entire battery box. The additional battery cell bus 320 connects the tabs of the soft-pack battery cells 312 of the two battery cell bodies 310 together to achieve electrical connection between the two battery cell bodies 310. As a result, the battery cell unit 300 becomes a complete whole, which is convenient for assembly.

[0050] Further optionally, the battery shells 311 of the two battery cell bodies 310 are bonded by double-sided adhesive. Thus, the two battery cell bodies 310 are integrated into a whole, which is convenient for assembly. Of course, in other embodiments of the utility model, the battery shells 311 of the two battery cell bodies 310 can also be fixed by other methods such as welding.

[0051] Further optionally, the two soft-packed cells 312 in each cell body 310 are bonded by double-sided adhesive. Thus, the two soft-packed cells 312 are combined into a whole, which is convenient for assembly. Of course, in other embodiments of the utility model, the two soft-packed cells 312 can also be fixed by other means such as cable ties and binding.

[0052] Optional, reference Figure 6 and Figure 7As shown, the battery box also includes an inter-group busbar 500, which is used to connect the cell busbars 320 of two adjacent cell units 300 and realize the electrical connection of the cell units 300 in two adjacent installation cavities. It can be understood that in the actual connection process, the inter-group busbar 500 is used to connect multiple cell units 300 in series or in parallel, which facilitates the electrical connection of all cell units 300 in the battery box, thereby simplifying the user's connection operation.

[0053] Optional, reference Figure 7 As shown, the two ends of the inter-group busbar 500 are respectively connected to a battery cell busbar 320 through a first fixing member 700. It can be understood that in the actual assembly process, after a plurality of battery cell units 300 are placed, the inter-group busbar 500 is aligned with two adjacent battery cell busbars 320, and then fixed with the first fixing member 700. This connection method is very convenient and detachable, which facilitates the maintenance of the battery box. The first fixing member 700 can be a structure such as a screw or a pin. Of course, in other embodiments of the utility model, the inter-group busbar 500 and the battery cell busbar 320 can also be directly welded, bonded, or connected by a snap-on connection, and are not limited to the first fixing member 700 connection of this embodiment.

[0054] Optionally, the battery cell shell 311 is an aluminum shell. The aluminum shell has good thermal conductivity. When the soft-pack battery cell 312 is working, on the one hand, the heat generated by the soft-pack battery cell 312 can be evenly distributed to the side wall of the soft-pack battery cell 312 with a larger area, thereby improving the temperature uniformity of the soft-pack battery cell 312 itself; on the other hand, the heat generated by the soft-pack battery cell 312 can be quickly transferred to the cooling member 110 or the heat dissipation component 400, thereby improving the cooling speed of the battery cell unit 300. Of course, in other embodiments of the utility model, the battery cell shell 311 can also be made of other materials according to actual needs.

[0055] Optional, reference Figure 3 and Figure 7As shown, multiple battery cell units 300 arranged in multiple installation cavities are connected in series, the two battery cell bodies 310 in each battery cell unit 300 are connected in parallel, and the two soft-pack battery cells 312 in each battery cell body 310 are connected in parallel. The specific connection method is as follows: the first end and the second end of the two battery cell bodies 310 in each battery cell unit 300 are respectively connected to a battery bus 320, and each battery bus 320 is connected to the pole ears of four soft-pack battery cells 312, so that the four soft-pack battery cells 312 are connected in parallel. The three adjacent battery cell units 300 (for the convenience of description, referred to as the first battery cell unit, the second battery cell unit and the third battery cell unit), the battery cell bus 320 at the first end of the first battery cell unit and the battery cell bus 320 at the first end of the second battery cell unit are connected through an inter-group bus 500 to achieve the series connection of the first battery cell unit and the second battery cell unit, the battery cell bus 320 at the second end of the second battery cell unit and the battery cell bus 320 at the second end of the third battery cell unit are connected through another inter-group bus 500 to achieve the series connection of the second battery cell unit and the third battery cell unit, thereby achieving the series connection of the first battery cell unit, the second battery cell unit and the third battery cell unit.

[0056] It should be noted that when the battery cell unit 300 only includes one battery cell body 310 and each battery cell body 310 only includes one soft-pack battery cell 312, the battery cell unit 300 does not need a battery cell bus 320, and two adjacent battery cell units 300 can directly connect the soft-pack batteries 312 of the two battery cell units 300 through the inter-group bus 500.

[0057] When there are multiple (more than two) cell bodies 310 in each cell body 310, the cell bus 320 can connect the multiple soft-pack cells 312 in the multiple cell bodies 310 in parallel or in series. The specific connection method can be selected according to actual needs.

[0058] When there are multiple (more than two) battery cell bodies 310 in each battery cell unit 300, there are also multiple battery cell busbars 320. The specific connection method can be derived from the structure when there are two battery cell bodies 310 as mentioned above, and no further explanation is needed here.

[0059] refer to Figure 5 As shown, the accommodating cavity is openly arranged on one side toward the cooling member 110, and the soft-packed battery cell 312 is stopped against the cooling member 110. It can be understood that, since the accommodating cavity is openly arranged on one side toward the cooling member 110, the soft-packed battery cell 312 is directly stopped against the cooling member 110, and the direct contact between the soft-packed battery cell 312 and the cooling member 110 is conducive to the cooling of the soft-packed battery cell 312 by the cooling member 110, thereby improving the cooling efficiency of the soft-packed battery cell 312.

[0060] Optionally, the soft-pack battery cell 312 is bonded to the cooling member 110 by means of thermal conductive adhesive. It is understandable that by fixing the soft-pack battery cell 312 to the cooling member 110 by means of thermal conductive adhesive bonding, on the one hand, the connection stability of the soft-pack battery cell 312 in the box 100 can be ensured, and on the other hand, the heat of the soft-pack battery cell 312 can be quickly transferred to the cooling member 110, thereby improving the cooling efficiency of the soft-pack battery cell 312.

[0061] In an alternative embodiment, two opposite sides of the battery cell shell 311 respectively stop at the cooling member 110 and the heat dissipation assembly 400. Thus, the upper and lower ends of the soft-pack battery cell 312 are protected in the battery cell shell 311, which can enhance the protective effect of the battery cell shell 311 on the soft-pack battery cell 312.

[0062] refer to Figure 8-Figure 10 As shown, the heat-insulating beam 200 includes a partition 210 and two mounting plates 220, the two mounting plates 220 are located on both sides of the partition 210 along the second direction, the partition 210 abuts against the cooling member 110, and the two mounting plates 220 are respectively connected to the two inner side walls of the box 100 that are arranged oppositely. It can be understood that the partition 210 becomes a beam structure in the box 100, and the battery cell unit 300 abuts against the partition 210, which can transfer the gravity of the battery cell unit 300 to the side wall of the box 100, so that each partition 210 becomes a reinforcing beam of the box 100, which is beneficial to improve the strength of the battery box and reduce the deformation degree of the battery box. By connecting the two ends of the heat-insulating beam 200 to the two side walls of the box 100 that are arranged oppositely through the two mounting plates 220, the connection stability between the heat-insulating beam 200 and the box 100 can be improved, thereby helping to improve the anti-deformation ability of the box 100.

[0063] Optionally, a first mounting hole is provided on the mounting plate 220, and a second mounting hole is provided on the inner side wall of the box body 100, and the connecting member 600 passes through the first mounting hole and is connected to the second mounting hole to connect the mounting plate 220 to the inner side wall of the box body 100. It is understandable that in the actual assembly process, after the thermal insulation beam 200 is placed inside the box body 100, the two mounting plates 220 are respectively stopped at the two side walls of the box body 100, and the first mounting hole is aligned with the second mounting hole, and then the connecting member 600 is passed through the first mounting hole and connected to the second mounting hole. As a result, the installation operation is very convenient, which is conducive to improving the assembly efficiency of the battery box. In this embodiment, the first mounting hole is a light hole, the second mounting hole is a threaded hole, and the connecting member 600 is a screw. In other embodiments of the utility model, the connecting member 600 can also be a pin or a rivet.

[0064] Further optionally, each mounting plate 220 is connected to the inner side wall of the box body 100 through a plurality of connectors 600, and the plurality of connectors 600 are divided into two groups, and the two groups of connectors 600 are respectively located on both sides of the partition 210 along the first direction. It can be understood that by dividing the connectors 600 into two groups, and the two groups of connectors 600 are respectively located on both sides of the partition 210, and fixing the mounting plate 220 to the inner side wall of the box body 100 through the two groups of connectors 600, the connection strength between the insulation beam 200 and the box body 100 can be improved, thereby improving the strength of the entire battery box.

[0065] In an alternative embodiment, the heat insulating beam 200 is welded to the box body 100. Thus, the heat insulating beam 200 can be installed inside the box body 100 without using the connecting member 600, which simplifies the connection method.

[0066] refer to Figure 1 and Fig.11 As shown, the heat dissipation assembly 400 includes a heat dissipation member 410, which is connected to the box body 100 and abuts against the side of the battery cell unit 300 away from the cooling member 110. It can be understood that by abutting against the side of the battery cell unit 300 away from the cooling member 110, the heat of the battery cell unit 300 can be dissipated to the outside of the battery box, thereby improving the cooling efficiency of the battery cell unit 300.

[0067] Optionally, two support beams 120 are provided in the box 100, and the two support beams 120 are respectively located on both sides of the plurality of heat insulation beams 200, and the two ends of the heat sink 410 are fixed on the support beams 120 by the second fixing member 800. It can be understood that the heat sink 410 is fixed on the support beam 120 by the second fixing member 800 to ensure the connection stability of the heat sink 410 in the box 100, and ensure that the heat sink 410 stops at the side of the battery cell unit 300 away from the cooling member 110, thereby ensuring that the heat sink 410 can stably dissipate the heat of the battery cell unit 300 to improve the cooling efficiency of the battery cell unit 300. In this embodiment, the second fixing member 800 is a screw. Of course, in other embodiments of the utility model, the second fixing member 800 can select a pin, a rivet or other structure according to actual needs. In addition, in the actual connection process, the heat sink 410 can also be connected to the box 100 by welding, bonding, etc., and is not limited to the connection method described above.

[0068] Optional, such as Figure 2As shown, the heat sink 410 is provided with heat dissipation fins 411. It can be understood that the additional heat dissipation fins 411 can increase the heat exchange area between the heat sink 410 and the air, thereby improving the heat dissipation efficiency of the heat sink 410, and on the other hand, the heat dissipation fins 411 also play a role in strengthening the structural strength of the heat sink 410, effectively improving the vibration and impact resistance of the battery box, and avoiding structural failure of the battery box under vibration and impact conditions.

[0069] Optionally, the heat dissipation assembly 400 further includes a thermally conductive adhesive layer 420, which is bonded between the heat dissipation element 410 and the side of the battery cell unit 300 away from the cooling element 110. It is understandable that by bonding the heat dissipation element 410 to the side of the battery cell unit 300 away from the cooling element 110 through the thermally conductive adhesive layer 420, on the one hand, the connection stability between the battery cell unit 300 and the heat dissipation element 410 in the box 100 can be ensured, and on the other hand, the heat of the soft-pack battery cell 312 can be quickly transferred to the heat dissipation element 410, thereby improving the cooling efficiency of the soft-pack battery cell 312.

[0070] Optionally, there are multiple heat sinks 410, which are spaced apart along the second direction, and the heat dissipation fins 411 on each heat sink 410 are extended along the first direction. It is understandable that arranging multiple heat sinks 410 spaced apart is conducive to improving the heat dissipation capacity of the battery cell unit 300.

[0071] Embodiment 2:

[0072] The structure of the battery box of this embodiment is substantially the same as that of the battery box of the embodiment, except that the heat sink of this embodiment is formed as a whole fin heat sink.

[0073] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery box, characterized in that: include: A box body (100), wherein a cooling element (110) is provided at the bottom of the box body (100); a plurality of heat-insulating beams (200), wherein the plurality of heat-insulating beams (200) are arranged in the box body (100) at intervals along a first direction, so as to divide the space in the box body (100) into a plurality of independent installation cavities; A plurality of battery cell units (300), each of the battery cell units (300) being arranged in one of the installation cavities and abutting against the cooling member (110), each of the battery cell units (300) comprising at least one battery cell body (310), each of the battery cell bodies (310) comprising a battery cell shell (311) and a soft-package battery cell (312) arranged in the battery cell shell (311); A heat dissipation component (400) is connected to the box body (100), and the heat dissipation component (400) abuts against a side of the battery core shell (311) away from the cooling element (110).

2. The battery box according to claim 1, characterized in that: The battery core shell (311) is openly arranged on one side facing the cooling member (110), and the side of the soft-package battery core (312) away from the heat dissipation component (400) abuts against the cooling member (110); or: Two oppositely disposed sides of the battery core shell (311) respectively abut against the cooling element (110) and the heat dissipation assembly (400).

3. The battery box according to claim 1, characterized in that: The two side walls of each of the battery core units (300) that are arranged opposite to each other both abut against the heat insulation beam (200).

4. The battery box according to claim 2, characterized in that: Each of the battery cell units (300) comprises a plurality of the battery cell bodies (310), and each of the battery cell units (300) further comprises a battery cell busbar (320), wherein the battery cell busbar (320) is used to realize electrical connection of the plurality of the battery cell bodies (310); The battery box further comprises an inter-group busbar (500), wherein the inter-group busbar (500) is used to realize the electrical connection between the battery cell units (300) in two adjacent installation cavities.

5. The battery box according to any one of claims 1 to 4, characterized in that: The heat dissipation assembly (400) comprises a heat dissipation element (410), the heat dissipation element (410) is connected to the box body (100), and the heat dissipation element (410) abuts against a side of the battery cell unit (300) that is away from the cooling element (110).

6. The battery box according to claim 5, characterized in that: The heat dissipation assembly (400) further comprises a heat conductive adhesive layer (420), wherein the heat conductive adhesive layer (420) is bonded between the heat dissipation element (410) and a side of the battery cell unit (300) away from the cooling element (110).

7. The battery box according to claim 5, characterized in that: There are a plurality of heat sinks (410), each of which is extended along the first direction, and a plurality of heat sinks (410) are spaced apart and distributed along the second direction of the thermal insulation beam (200).

8. The battery box according to any one of claims 1 to 4, characterized in that: The thermal insulation beam (200) includes a partition (210) and two mounting plates (220), wherein the two mounting plates (220) are located on both sides of the partition (210) along the second direction, the partition (210) abuts against the cooling element (110), and the two mounting plates (220) are respectively connected to the two inner side walls of the box body (100).

9. The battery box according to claim 8, characterized in that: The mounting plate (220) is provided with a first mounting hole, the inner wall of the box body (100) is provided with a second mounting hole, and the connecting member (600) passes through the first mounting hole and is connected to the second mounting hole to connect the mounting plate (220) to the inner wall of the box body (100).

10. The battery box according to claim 8, characterized in that: Each of the mounting plates (220) is connected to the inner wall of the box body (100) via a plurality of connecting members (600), and the plurality of connecting members (600) are divided into two groups, and the two groups of connecting members (600) are respectively located on both sides of the partition plate (210) along the first direction.

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