Battery pack and electric equipment

Abstract

The invention relates to the technical field of power batteries, in particular to a battery pack and electric equipment. The battery pack comprises a plurality of modules arranged at intervals along a first direction; the box body comprises a bottom plate and side plates connected to the edges of the bottom plate, and the side plates and the bottom plate define a containing cavity; the side plates comprise two first side plates which are oppositely arranged along a second direction, each first side plate comprises a first side plate body and a first mounting part which is convexly arranged on the first side plate body, and the second direction is perpendicular to the first direction; and the at least one supporting plate is arranged in the containing cavity to at least divide the containing cavity into an upper cavity body and a lower cavity body, the supporting plate comprises a containing part and a second mounting part used for being fixedly connected with the first mounting part, the containing part comprises a bottom wall and two opposite side walls connected to the edge of the bottom wall, and the two side walls are used for supporting the module. The electric equipment comprises a battery pack. The battery pack and the electric equipment solve the technical problem that a battery pack system occupies a large space in the X / Y horizontal direction.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery pack and electrical equipment. Background Art

[0002] At present, battery pack power system designs mostly use a single-layer cell arrangement, that is, all cells are arranged on the same level. This single-layer cell arrangement not only takes up a relatively large space in the horizontal direction and occupies a relatively large projected area, which is not conducive to the overall battery pack design, insufficient space utilization, and complex processes; but also the support structure that bears the weight of all the cells is overloaded, lacks strength, is easily deformed, and has poor reliability of the support structure; at the same time, a liquid cooling plate is generally set between the cell and the support structure, so that the liquid cooling plate bears the weight of the cell. The structural strength of the liquid cooling plate is difficult to bear the weight of the cell, and it is also prone to deformation and even damage and leakage. Summary of the Invention

[0003] The purpose of this application is to provide a battery pack and electrical equipment to solve the technical problems of the existing battery pack system in that it occupies a large space in the horizontal direction and has poor support strength reliability.

[0004] In a first aspect, the present application provides a battery pack comprising:

[0005] A plurality of modules spaced apart along a first direction;

[0006] The box body includes a bottom plate and side plates connected to the edges of the bottom plate, wherein the side plates and the bottom plate together form a receiving cavity; the side plates include two first side plates arranged opposite to each other along a second direction, the first side plates include a first side plate body and a first mounting portion protruding from the first side plate body, and the second direction is perpendicular to the first direction;

[0007] At least one support plate is arranged in the accommodating cavity to divide the accommodating cavity into at least an upper cavity and a lower cavity, the support plate includes a accommodating portion and a second mounting portion for fixedly connected to the first mounting portion, the accommodating portion includes a bottom wall and two opposite side walls connected to the edges of the bottom wall, and the two side walls are used to support the module.

[0008] Furthermore, the battery pack further comprises a heat exchange plate arranged on the bottom plate and / or the support plate, and at least two positioning pins for positioning the heat exchange plate are provided on the upper surface of the bottom plate and / or the support plate;

[0009] wherein two of the positioning pins are located on different sides of the base plate; and / or

[0010] Two of the positioning pins are located on different sides of the support plate.

[0011] Furthermore, the heat exchange plate is arranged on the support plate, the bottom wall and the side wall form a groove, and the heat exchange plate is arranged in the groove.

[0012] Furthermore, there are two positioning pins, which are respectively located on two opposite sides of the bottom wall.

[0013] Furthermore, a notch is provided on an edge of the bottom wall of the support plate, and the notch passes through the support plate along the thickness direction of the support plate, and the notch is used for copper busbars and / or wiring harnesses to pass through.

[0014] Furthermore, the support plate has two first side portions arranged opposite to each other along the first direction, and the notch is formed on one of the two first side portions.

[0015] Furthermore, the support plate is an extruded profile having a plurality of cavities spaced apart from each other.

[0016] Furthermore, the module includes an end plate and a plurality of battery cells stacked along a predetermined direction, and the lower end of the battery cell along the height direction of the battery cell protrudes downward from the lower end of the end plate so that the lower end of the battery cell extends into the accommodating portion, and the lower end of the end plate abuts against the top end of the side wall.

[0017] Furthermore, a heat conducting member is provided between the heat exchange plate and the lower end of the battery core.

[0018] In a second aspect, the present application provides an electrical device comprising the battery pack described in any one of the foregoing.

[0019] Compared with the prior art, the battery pack and electrical equipment provided by the present application can be provided with a plurality of modules spaced apart in the upper and lower directions along the first direction in the box body. The modules can be specifically battery modules, which are arranged in the accommodating cavity of the box body. The accommodating cavity in the box body is provided with at least one support plate along the second direction perpendicular to the first direction to separate the accommodating cavity into at least two sub-cavities along the first direction, namely the upper cavity and the lower cavity. A group of modules can be respectively provided in the upper cavity and the lower cavity. A group of modules can be provided with multiple battery cells. Compared with the single-layer arrangement of all battery cells in the prior art, at least two groups of modules can be provided in the box body along the first direction, and even more groups of modules can be provided, so that all the batteries arranged in the horizontal direction are connected. The single-layer modules are grouped and spaced apart in the longitudinal direction, which solves the technical problem that the existing battery pack system occupies a large amount of space in the horizontal direction; furthermore, the two first side panels of the box body are respectively provided with a first mounting portion for fixing the support plate, and specifically, the support plate includes a receiving portion and a second mounting portion for fixedly connecting to the first mounting portion of the first side panel of the box body, thereby improving the connection and support reliability of the support plate; and the receiving portion of the support plate includes a bottom wall and two opposite side walls connected to the edges of the bottom wall, and the two side walls are used to support the module, thereby improving the supporting strength of the module, thereby improving the overall supporting strength reliability, and effectively preventing the bottom plate used to support the single-layer module in the existing technology from being easily bent and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 An exploded diagram of the battery pack provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the box structure of the battery pack provided in an embodiment of the present application;

[0023] Figure 3 Schematic diagram of the partial structure of the battery pack provided in the embodiment of the present application Figure 1 ;

[0024] Figure 4 Schematic diagram of the partial structure of the battery pack provided in the embodiment of the present application Figure 2 ;

[0025] Figure 5 A cross-sectional view of a battery pack provided in an embodiment of the present application;

[0026] Figure 6 A cross-sectional view of a support structure provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of the structure of the support structure provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of the bottom of the battery pack provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 10-box; 11-bottom plate; 111-first positioning pin; 12-side plate; 121-first side plate; 1211-first mounting portion; 1212-first nut bushing; 13-accommodating cavity; 14-support plate; 141-bottom wall; 1411-upper top plate; 1412-lower bottom plate; 1413-cavity; 1414-second positioning pin; 1415-notch; 1416-first reinforcing rib; 142-side wall; 1421- Second nut bushing; 143-second mounting portion; 1431-first bolt through-hole bushing; 1432-second reinforcing rib; 15-heat exchange plate; 16-top cover; 17-lifting ear; 20-module; 21-end plate; 22-battery cell; 31-heat conducting member; 32-heat insulation plate; 33-supporting foam; 40-isolating space; 51-first bolt; 52-second bolt; 60-supporting beam; 61-heat insulation plate; 80-friction welding track. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0037] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0038] like Figures 1 to 8 As shown, the embodiment of the present application provides a battery pack and an electrical device using the battery. The battery pack includes a box 10 and a module 20, as shown in FIG. Figure 5The first and second directions shown in the figure are perpendicular to each other, preferably the first direction is a vertical longitudinal direction, and the second direction is parallel to the horizontal direction. The battery pack has a plurality of modules 20 spaced apart along the first direction, and the modules 20 can be specifically battery modules. The box body 10 includes a bottom plate 11 and a side plate 12 connected to the edge of the bottom plate 11. The side plate 12 and the bottom plate 11 together form a accommodating cavity 13 with an open top, and the modules 20 can be disposed in the accommodating cavity 13. The side plate 12 includes two first side plates 121 arranged opposite to each other along the second direction, and a second side plate (not shown) connecting the two adjacent first side plates 121. The first side plate 121 includes a first side plate body and a first mounting portion 1211 and a supporting crossbeam 60 that are sequentially protruded from the first side plate body on the side facing the accommodating cavity 13. In order to improve the overall strength of the battery pack and to facilitate the installation of the modules 20, the protruding length of the supporting crossbeam 60 is greater than the length of the first mounting portion 1211. The length setting of the support beam 60 can also facilitate the installation and fixation of the base plate 11. Figure 8 As shown, the bottom plate 11 and side plates 12 of the box body 10 can be welded together by friction welding (see friction welding track 80) and segment welding. The protrusion of the support beam 60 expands the weldable range and improves welding stability. In addition, the top of the box body 10 can also be installed with a top cover 16 to cover its open opening.

[0039] The aforementioned box body 10 includes at least one support plate 14 in the accommodating cavity 13 to divide the accommodating cavity 13 into at least two upper and lower sub-cavities, namely an upper cavity and a lower cavity, for accommodating the module 20. The support plate 14 includes a accommodating portion and a second mounting portion 143 for fixedly connecting to the aforementioned first mounting portion 1211. The accommodating portion includes a bottom wall 141 and two opposite side walls 142 connected to the opposite side portions of the bottom wall 141. The tops of the two side walls 142 are used to support the module 20.

[0040] Compared with the prior art, the battery pack and electrical equipment provided in the embodiments of the present application can be provided with a plurality of modules 20 spaced apart in the upper and lower directions along the first direction in the box body 10. The modules 20 can be specifically battery modules. The modules 20 are arranged in the accommodating cavity 13 of the box body 10. At least one support plate 14 is provided in the accommodating cavity 13 of the box body 10 along the second direction perpendicular to the first direction to separate the accommodating cavity 13 into at least two sub-cavities along the first direction, namely the upper cavity and the lower cavity. A group of modules 20 can be respectively provided in the upper cavity and the lower cavity. A group of modules can be provided with multiple battery cells. Compared with the single-layer arrangement of all battery cells in the prior art, at least two groups of modules can be provided in the box body 10 along the first direction, and even more groups of modules can be provided, so that all single-layer modules arranged in the horizontal direction are separated and grouped. The longitudinal spacing solves the technical problem that the existing battery pack system occupies a large amount of space in the horizontal direction; furthermore, the two first side panels 121 of the box body 10 are respectively provided with a first mounting portion 1211 for fixing the support plate, specifically, the support plate 14 includes a receiving portion and a second mounting portion 143 for fixedly connecting to the first mounting portion 1211 of the first side panel 121 of the box body 10, thereby improving the connection and support reliability of the support plate 14; and the receiving portion of the support plate 14 includes a bottom wall 141 and two opposite side walls 142 connected to the edges of the bottom wall 141, the two side walls 142 are used to support the module 20, thereby improving the support strength of the module, so as to improve the reliability of the overall support strength of the battery pack, and effectively prevent the bottom plate used to support the single-layer module in the prior art from being easily bent and damaged.

[0041] Specifically, such as Figure 5 As shown, the aforementioned module 20 may include end plates 21 arranged on opposite sides and a plurality of battery cells 22 stacked along a predetermined direction between the two end plates 21, and the predetermined direction may be the aforementioned second direction. The two side walls 142 are perpendicularly arranged on the edge of the bottom wall 141, thereby forming a U-shaped accommodating portion for accommodating the module 20. Specifically, along the height direction of the battery cell 22, the lower end of the battery cell 22 may protrude downward from the lower ends of the end plates 21 on both sides thereof, so that the lower end of the battery cell 22 extends into the accommodating portion, specifically, it may penetrate into the U-shaped accommodating portion formed by the bottom wall 141 and the two side walls 142, and the lower end of the end plate 21 abuts against the top of the side wall 142. The bottom of the battery cell 22 is located above the bottom wall 141, and the end plates 21 on both sides are supported on the side walls 142, so that the side walls 142 mainly bear the weight of the module 20, which can reduce the stress on the bottom wall 141, or even eliminate the stress on the bottom wall 141. This design not only facilitates the positioning and fixed installation of the module 20, but also improves the support strength of the side walls 142, effectively preventing deformation of the bottom wall 141. Furthermore, in the first direction, the wall thickness of the side walls 142 is greater than that of the bottom wall 141, thereby further improving the support strength and preventing the bottom wall from bending and deformation.

[0042] More preferably, Figures 5 to 7 As shown, the top ends of the aforementioned two side walls 142 are higher than the upper plate 1411 of the aforementioned bottom wall 141, so that the bottom wall 141 and the two side walls 142 form a groove, and the heat exchange plate 15 can be arranged in the groove, and the aforementioned battery cell 22 is located above the heat exchange plate 15; the top ends of the two side walls 142 are set higher than the upper plate 1411 of the bottom wall 141, so that the support plate 14 forms a structure with thick ends and thin middle, and the side walls 142 at both ends are used to support the end plates 21 of the module 20, mainly bearing the force applied by the end plates 21 of the module 20 to support the weight of the entire module 20, and the weight of the battery module is generally relatively large, so the thickness of the side walls 142 at both ends is set to be relatively large to improve its rigidity, strength and supporting capacity, and the middle bottom wall 141 is mainly used to support the heat exchange plate 15 structure, mainly bearing the weight of the heat exchange plate 15, and the weight of the heat exchange plate 15 is relatively small compared with the weight of the battery module. In this way, by treating different parts of the support plate 14 with different thicknesses to correspond to components bearing different weights, not only materials are saved, but also space in height is saved. At the same time, the gravity of the module 20 is prevented from being applied to the heat exchange plate 15, preventing the heat exchange plate 15 from being crushed, further ensuring the reliability of the support strength and the safety and reliability of the components, and further saving space in height.

[0043] Furthermore, a heat exchange plate 15 may be disposed between the base plate 11 and / or the support plate 14 and the battery cells 22 to ensure good heat exchange between the module 20 and the heat exchange plate 15. Furthermore, when the base plate 11 of the battery pack collides with another object, the base plate 11 protects the heat exchange plate 15 disposed thereon from damage, thereby preventing leakage from the heat exchange plate 15, which could lead to poor insulation within the battery pack or even thermal runaway.

[0044] Optionally, a heat insulating sheet may be provided between the top wall and the end plate 21 , and / or a heat insulating sheet 61 may be provided at the connection between the support beam 60 and the end plate 21 to insulate the module 20 and further achieve a heat insulating effect.

[0045] Furthermore, Figure 4 and Figure 7 As shown, an optional embodiment is that the upper surface of the aforementioned base plate 11 is provided with at least two first positioning pins 111 for positioning the aforementioned heat exchange plate 15, wherein the two first positioning pins 111 are respectively located on different edges of the base plate 11. The function of the positioning pins is to limit the installation of the heat exchange plate 15 to ensure the accuracy of its assembly position. Another optional embodiment is that the upper surface of the aforementioned support plate 14 (that is, the upper top plate 1411 of the bottom wall 141) is provided with at least two second positioning pins 1414 for positioning the aforementioned heat exchange plate 15, wherein the two second positioning pins 1414 are located on different edges of the support plate 14, specifically, they can be located on two opposite corners of the bottom wall 141. To ensure that the positioning connection is more stable.

[0046] like Figure 1 and Figure 5 As shown, a heat-conducting member 31, such as thermal adhesive, may be disposed between the heat exchange plate 15 and the lower end of the battery cell 22. The thermal adhesive is a heat-conducting medium that fills the gap between the module 20 and the heat exchange plate 15, ensuring that there is no air gap between the heat exchange plate 15 and the module 20, thereby ensuring good heat exchange between the two. Furthermore, a support foam 33 may be disposed between the base plate 11 and the heat exchange plate 15, and / or between the support plate 14 and the heat exchange plate 15. The support foam 33 has a certain degree of elasticity, providing support and protection for the heat exchange plate 15 and the heat-conducting member 31, preventing the heat exchange plate 15 from colliding with other components during vibration.

[0047] like Figure 5 As shown, a heat shield 32 can be installed at the bottom of the aforementioned support plate 14. Specifically, it can be a mica board, which has flame retardant and heat-insulating properties, and can prevent the module 20 in the upper cavity from thermal runaway, thereby causing the module 20 in the lower cavity to thermally runaway. Further preferably, the heat shield 32 forms an isolation space 40 of a preset distance between the side away from the support plate 14 and the module 20 in the lower cavity, to help exhaust the module 20 in the lower cavity, while further flame-retarding the module 20 in the lower cavity, effectively preventing thermal runaway. The heat shield 32 can be removably mounted to the bottom of the support plate 14 by bolts, thereby facilitating installation and replacement.

[0048] like Figure 7 As shown, a notch 1415 is defined along the edge of the bottom wall 141 of the support plate 14. The notch 1415 extends through the support plate 14 along its thickness. The notch 1415 is configured to allow copper busbars and / or wiring harnesses to pass through. Furthermore, the support plate 14 has two first edges disposed opposite each other along a first direction, with the notch 1415 defined on one of the two first edges.

[0049] like Figure 6As shown, the support plate 14 is an extruded profile having multiple mutually spaced cavities 1413. Specifically, the support plate 14 includes an upper top plate 1411 and a lower bottom plate 1412, and a plurality of first reinforcing ribs 1416 spaced apart between the upper top plate 1411 and the lower bottom plate 1412, thereby forming multiple cavities 1413 between the upper top plate 1411 and the lower bottom plate 1412. This ensures strength while reducing weight. Furthermore, the spacing between the first reinforcing ribs 1416 located on the bottom wall 141 is greater than the spacing between the first reinforcing ribs 1416 located on the side walls 142. At the same time, the spacing between the first reinforcing ribs 1416 located on the side walls 142 is greater than or equal to the spacing between the first reinforcing ribs 1416 located on the first mounting portion 1211. The number of reinforcing ribs is appropriately distributed according to the degree of force, thereby reducing overall weight. Furthermore, the spacing between the upper top plate 1411 and the lower bottom plate 1412 can also provide a certain degree of thermal insulation, further achieving thermal insulation between the upper and lower modules 20. Specifically, the support plate 14 is formed by integral extrusion of a profile to improve its overall strength.

[0050] It should be noted that the upper plate 1411, the lower plate 1412 and the spacer cavity 1413 of the support plate 14 are arranged such that the heat exchange plate 15 is arranged on the side of the upper plate 1411 away from the lower plate 1412, and the heat insulation plate 32 is arranged on the side of the lower plate 1412 away from the upper plate 1411. This ensures the heat insulation of the upper and lower chambers while providing a fixed space for the heat insulation plate 32, thereby improving the installation convenience and connection firmness of the heat insulation plate 32. At the same time, since the weight of the heat exchange plate 15 and the heat insulation plate 32 are much smaller than the weight of the module 20, the heat exchange plate 15 and the heat insulation plate 32 are fixed to the bottom wall 141. The gravity of the heat exchange plate 15 and the heat insulation plate 32 is much smaller than the gravity of the module 20. The strength of the bottom wall 141 can withstand the gravity of the heat exchange plate 15 and the heat insulation plate 32 without deformation. Figure 5As shown, in a specific embodiment, a first nut bushing 1212 is provided on the first mounting portion 1211 of the first side plate 121, and a first bolt through-hole bushing 1431 is provided on the second mounting portion 143 of the support plate 14. The first nut bushing 1212 and the first bolt through-hole bushing 1431 are fixedly connected by a first bolt 51, thereby fixing the first mounting portion 1211 and the second mounting portion 143 together, thereby fixing the support plate 14 to the first side plate 121 and improving the connection strength. Optionally, a second nut bushing 1421 is provided on the side wall 142 of the support plate 14, and a second bolt through-hole bushing is provided on the end plate 21 of the module 20. The second nut bushing 1421 and the second bolt through-hole bushing are fixedly connected by a second bolt 52, thereby fixing the end plate 21 of the module 20 to the side wall 142 of the support plate 14. Furthermore, at least one second reinforcing rib 1432 is provided between the first bolt through-hole bushing 1431 and the second nut bushing 1421 to enhance the connection strength and support capacity between the first mounting portion 1211 and the sidewall 142. It should be noted that both the first reinforcing rib 1416 and the second reinforcing rib 1432 extend along their respective force-bearing directions to enhance overall structural strength.

[0051] like Figure 4 and Figure 5 As shown, one end of the first side plate 121 along the first direction is bent inward to form a support beam 60, and a U-shaped groove is formed between the support beam 60 and the bottom plate 11. The end plates 21 on both sides of the module 20 in the aforementioned lower cavity can be supported on the two support beams 60 respectively, and the battery cells 22 can be accommodated in the U-shaped groove. The overall weight of the module 20 is concentrated on the support beam 60, and the bottom plate 11 does not bear the gravity of the battery cells 22 to prevent the bottom plate 11 from being deformed by force. Specifically, the support beam 60 has a third reinforcing rib (not marked) extending along the direction of its force to improve the support strength of the support beam 60. The spacing between adjacent third reinforcing ribs is less than or equal to the spacing between adjacent second reinforcing ribs 1432 to ensure that the strength of the support beam 60 at the bottom is greater than the strength of the second mounting portion 143. Among them, the connection between the end plate 21 and the support beam 60 can refer to the connection between the end plate 21 and the side wall 142 in the upper module 20, and will not be repeated. A heat exchange plate 15 can be installed between the base plate 11 and the battery cells 22. The top surface of the base plate 11 is equipped with at least two locating pins for positioning the heat exchange plate 15. These two locating pins are located on different edges of the base plate 11 and can be positioned diagonally to ensure accurate installation and connection stability of the heat exchange plate 15. Specifically, a heat conductor 31, heat exchange plate 15, and supporting foam 33 are arranged from top to bottom between the battery cells 22 and the base plate 11, improving overall integration and ensuring heat exchange efficiency and overall safety of the battery cells 22.

[0052] Specifically, when installing the modules 20 in different chambers, the modules 20 can be installed layer by layer from bottom to top along the opening direction of the box body. First, the module 20 in the lower chamber is installed on the supporting beam 60, and then the support plate 14 together with the module 20 in the upper chamber are installed on the first mounting portion 1211. The length of the first mounting portion 1211 along the second direction is smaller than the supporting beam, so as to avoid the first mounting portion 1211 obstructing the installation of the module 20 in the lower chamber.

[0053] In addition, if Figures 1 to 5 As shown, a lifting lug 17 is installed on the outer wall of the side panel of the aforementioned box body 10. The lifting lug 17 not only serves to fix the entire package, but also can be used for lifting the entire package.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A plurality of modules (20) spaced apart along a first direction; A box body (10) comprises a bottom plate (11) and a side plate (12) connected to an edge of the bottom plate (11), wherein the side plate (12) and the bottom plate (11) together form a receiving cavity (13); the side plate (12) comprises two first side plates (121) arranged opposite to each other along a second direction, the first side plate (121) comprises a first side plate body and a first mounting portion (1211) protruding from the first side plate body, and the second direction is perpendicular to the first direction; At least one support plate (14) is arranged in the accommodating cavity (13) to divide the accommodating cavity (13) into at least an upper cavity and a lower cavity, the support plate (14) comprising an accommodating portion and a second mounting portion (143) for fixedly connecting to the first mounting portion (1211), the accommodating portion comprising a bottom wall (141) and two opposite side walls (142) connected to the edges of the bottom wall (141), the two side walls (142) being used to support the module (20).

2. The battery pack according to claim 1, wherein: It also includes a heat exchange plate (15) arranged on the bottom plate (11) and / or the support plate (14), and at least two positioning pins for positioning the heat exchange plate (15) are provided on the upper surface of the bottom plate (11) and / or the support plate (14); wherein two of the positioning pins are located on different sides of the base plate (11); and / or Two of the positioning pins are located on different sides of the support plate (14).

3. The battery pack according to claim 2, wherein: The heat exchange plate (15) is arranged on the support plate (14), the bottom wall (141) and the side wall (142) form a groove, and the heat exchange plate (15) is arranged in the groove.

4. The battery pack according to claim 3, wherein: There are two positioning pins, which are respectively located on two oppositely disposed edges of the bottom wall (141).

5. The battery pack according to claim 1, wherein: A notch (1415) is provided on the edge of the bottom wall (141) of the support plate (14), and the notch (1415) penetrates the support plate (14) along the thickness direction of the support plate (14), and the notch (1415) is used for allowing copper bars and / or wire harnesses to pass through.

6. The battery pack according to claim 5, characterized in that: The support plate (14) has two first side portions arranged opposite to each other along the first direction, and the notch (1415) is provided on one of the two first side portions.

7. The battery pack according to claim 1, wherein: The support plate (14) is an extruded profile having a plurality of mutually spaced cavities (1413).

8. The battery pack according to claim 2, wherein: The module (20) includes an end plate (21) and a plurality of battery cells (22) stacked in a predetermined direction, wherein the lower end of the battery cell (22) in the height direction of the battery cell (22) protrudes downward from the lower end of the end plate (21), so that the lower end of the battery cell (22) extends into the accommodating portion, and the lower end of the end plate (21) abuts against the top end of the side wall (142).

9. The battery pack according to claim 8, characterized in that: A heat conducting member (31) is provided between the heat exchange plate (15) and the lower end of the battery core (22).

10. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 9.

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