Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle. The battery pack comprises a box body assembly, a plurality of battery cells and an insulating reinforcing plate, the box body assembly is provided with a protection cavity and an opening communicated with the protection cavity. At least parts of the plurality of battery cells are fixedly arranged in the protection cavity, each battery cell comprises a first end part and an electrode part, the first end part and the bottom of the protection cavity are arranged at intervals, and at least parts of the electrode parts are exposed out of the first end parts. The insulation reinforcing plate is provided with a plurality of first avoiding through holes for avoiding the electrode parts, and the insulation reinforcing plate is fixedly connected with the first end parts of the plurality of battery cells, so that the first avoiding through holes correspond to the electrode parts one by one. According to the battery pack, the structural hardness of parts in the battery pack can be improved, and excessive reinforcing ribs do not need to be arranged on the box body assembly, so that the structural hardness of the battery pack is improved, and the space is saved.

Description

Technical Field

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

[0002] With the development of new energy vehicles, the battery pack in the vehicle is an important energy component. How to improve the structural strength of the battery pack to avoid battery pack operation problems caused by collisions during vehicle driving is a major issue that many manufacturers need to solve.

[0003] In the related art, in order to increase the structural strength of the battery pack, manufacturers generally adopt the method of setting reinforcing ribs on the frame of the battery pack. However, excessive setting of reinforcing ribs will lead to a reduction in the bonding area of ​​the battery pack, thereby causing the parts inside the battery pack to loosen. At the same time, the setting of reinforcing ribs can only strengthen the structural strength of the outer frame, and it is still difficult to strengthen the battery parts inside the battery pack. Summary of the invention

[0004] The present application provides a battery pack and a vehicle. The battery pack in the present application is conducive to improving the structural hardness of the parts in the battery pack, and there is no need to set too many reinforcing ribs on the box assembly, thereby improving the structural hardness of the battery pack and saving space.

[0005] The technical solution is as follows:

[0006] According to a first aspect of an embodiment of the present application, a battery pack is provided, comprising: a box assembly, a plurality of battery cells, and an insulating reinforcement plate.

[0007] The box assembly is provided with a protection cavity and an opening communicated with the protection cavity.

[0008] At least part of the plurality of battery cells is fixed in the protective cavity, the battery cell comprises a first end portion spaced apart from the bottom of the protective cavity and an electrode portion, at least part of the electrode portion is exposed outside the first end portion;

[0009] The insulating reinforcement plate is provided with a plurality of first avoidance through holes for avoiding the electrode parts. The insulating reinforcement plate is fixedly connected to the first ends of the plurality of battery cells so that the first avoidance through holes correspond to the electrode parts one by one.

[0010] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0011] By fixing the insulating reinforcing plate with the battery cell, the structural strength of the battery cell and the battery pack can be improved. At the same time, there is no need to set up too many additional reinforcing ribs, which improves space utilization.

[0012] The technical solution is described in detail below:

[0013] In one embodiment, the first ends of the plurality of battery cells are bonded and fixed to the insulating reinforcement plate.

[0014] In one embodiment, the battery pack further includes a first adhesive layer, which is sandwiched between the first end and the insulating reinforcement plate, so that the first ends of the plurality of battery cells are bonded and fixed to the insulating reinforcement plate. And / or, the first end is provided with a metal end surface, and the metal end surface is insulated from the electrode portion. The metal end surface is bonded and fixed to the insulating reinforcement plate.

[0015] In one of the embodiments, the battery pack further includes an explosion-proof valve.

[0016] The explosion-proof valve is arranged at a first end with a spacing from the electrode portion. The insulating reinforcement plate is provided with a plurality of second avoidance through holes for avoiding the explosion-proof valve, and the plurality of second avoidance through holes correspond to the explosion-proof valve one by one. Alternatively, the explosion-proof valve is arranged at a spacing at the bottom of the protection cavity, and the bottom of the protection cavity is provided with a plurality of third avoidance through holes for avoiding the explosion-proof valve, and the plurality of third avoidance through holes correspond to the explosion-proof valve one by one.

[0017] In one embodiment, the battery pack further includes a plurality of transmission members disposed on the insulating reinforcement plate, two adjacent transmission members are disposed on the insulating reinforcement plate at intervals, and one transmission member is connected in series with electrode portions of a plurality of battery cells.

[0018] In one embodiment, the transmission element includes a flexible circuit board and a plurality of conductive elements electrically connected to the flexible circuit board. The plurality of conductive elements correspond to the electrode parts one by one, and the two are in conductive contact.

[0019] In one embodiment, the box assembly further includes a box body having a protective cavity. The box assembly further includes at least one reinforcing rib disposed in the protective cavity, the reinforcing rib being disposed in the protective cavity to divide the protective cavity into at least two installation areas. The plurality of cells are arranged into a group of cell assemblies, and at least one group of cell assemblies is installed in the installation area.

[0020] And / or, the box body includes a liquid-cooling bearing plate and a bearing frame, and the liquid-cooling bearing plate is arranged on the bearing frame.

[0021] In one embodiment, the box body includes a load-bearing plate and a frame. The load-bearing plate and the frame form a protective cavity. The battery pack is provided with a plurality of elastic members, and at least one elastic member is sandwiched between two adjacent battery cells so that the battery cell assembly is squeezed and matched with the frame and the reinforcing ribs. And / or, the insulating reinforcing plate is fixedly connected to the box body and / or the reinforcing ribs.

[0022] In one embodiment, the battery cell assembly is bonded and fixed to the carrier plate. Alternatively, the battery cell assembly is bonded and fixed to the carrier plate and the frame.

[0023] According to a second aspect of an embodiment of the present application, a vehicle is provided, comprising a frame assembly and the battery pack in the above embodiment, wherein the battery pack is mounted on the frame assembly.

[0024] The technical solution is described in detail below:

[0025] By arranging the battery pack on the frame assembly, the stability of the energy supply of the vehicle is improved, and at the same time, the battery pack is prevented from breaking, causing battery leakage, difficulty in operation, or even danger.

[0026] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to help understand the accompanying drawings provided by the utility model. The schematic accompanying drawings and their descriptions of the utility model are used to explain the technical solution of the utility model and do not constitute an improper limitation on the protection scope of the utility model.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 Schematic diagram of the structure of a vehicle in one embodiment.

[0030] Figure 2 for Figure 1 A side view of the battery pack shown in FIG.

[0031] Figure 3 for Figure 2 Schematic diagram of battery pack explosion and disassembly shown in .

[0032] Figure 4 for Figure 3 Schematic diagram of the setting of the first bonding layer.

[0033] Figure 5 for Figure 2 Schematic diagram of the explosion-proof valve installation structure of the battery pack shown.

[0034] Figure 6 for Figure 2 A schematic diagram of the structure of a transmission component shown in an embodiment.

[0035] Figure 7 for Figure 2 A schematic structural diagram of a transmission component shown in another embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 10. Vehicle; 100. Battery pack; 110. Box assembly; 111. Protective cavity; 112. Box body; 1121. Load plate; 1122. Frame; 113. Reinforcement ribs; 114. Installation area; 120. Battery cell; 121. First end; 122. Electrode portion; 130. Insulation reinforcement plate; 140. First bonding layer; 150. Explosion-proof valve; 160. Transmission component; 170. Flexible circuit board; 180. Conductive component; 190. Elastic component; 200. Frame assembly. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of this application more clear, the following is a further detailed description of this application in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain this application and do not limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0040] In the related art, the battery pack often increases the structural strength of the battery pack by setting a plurality of reinforcing ribs on the frame. However, this arrangement takes up a large space, and the arrangement of the reinforcing ribs requires forming a corresponding escape space for the battery parts. However, the reinforcing ribs are difficult to provide sufficient support strength for the battery parts corresponding to the escape space. When a collision occurs, the battery parts in this part will be broken, causing unstable operation of the vehicle.

[0041] Based on this, see Appendix Figure 1 As shown, the present application provides a vehicle 10, including a battery pack 100 and a frame assembly 200, wherein the battery pack 100 is mounted on the frame assembly 200.

[0042] See attached Figures 2 to 3 As shown, the battery pack 100 includes a box assembly 110, a plurality of battery cells 120, and an insulating reinforcement plate 130. The box assembly 110 is provided with a protective cavity 111 and an opening communicating with the protective cavity 111. At least part of the plurality of battery cells 120 is fixed in the protective cavity 111. Specifically, in some embodiments, in order to improve the space utilization and aesthetics in the protective cavity 111, the plurality of battery cells 120 are sequentially spaced and arranged in parallel in the protective cavity 111.

[0043] The battery cell 120 includes a first end portion 121 spaced apart from the bottom of the protective cavity 111 and an electrode portion 122, at least part of the electrode portion 122 being exposed outside the first end portion 121. The electrode portion 122 can be used to electrically connect to a circuit board or other driving components on the vehicle 10. The insulating reinforcement plate 130 is fixedly connected to the first ends 121 of the plurality of battery cells 120, and the insulating reinforcement plate 130 is provided with a plurality of first avoidance through holes for avoiding the electrode portion 122, so that the first avoidance through holes correspond to the electrode portion 122 one by one.

[0044] In this way, through the cooperation between the insulating reinforcement plate 130 and the first end 121, the insulating reinforcement plate 130 can directly protect the battery cell 120 from a huge impact, and the structural strength of the battery cell 120 and the battery pack 100 can be improved. Furthermore, there is no need to set up too many additional reinforcing ribs 113, which improves space utilization. At the same time, the cooperation between the first avoidance through hole and the electrode part 122 allows the electrode part 122 to be electrically connected to the external power connection component through the first avoidance part, forming a certain avoidance space. In addition, through the provision of the insulating reinforcement plate 130, the discharge interference of the battery cell 120 can be reduced, and the operating stability of the battery can be improved.

[0045] It should be noted that the first end portion 121 and the insulating reinforcement plate 130 may be fixedly connected by bonding, clamping, etc., which is not limited here.

[0046] In some embodiments, the Figure 4 As shown, the first ends 121 of the plurality of battery cells 120 are bonded and fixed to the insulating reinforcing plate 130. In this way, the bonding connection method is convenient for processing and has good connection strength, reduces the generation of gaps, and thus prevents the entry of dust particles.

[0047] It is understandable that the connection between the first end portion 121 and the insulating reinforcing plate 130 may be through an adhesive layer, or the first end portion 121 may be formed by an adhesive layer. Figure 4 As shown, the battery pack 100 also includes a first adhesive layer, which is sandwiched between the first end portion 121 and the insulating reinforcement plate 130 so that the first end portions 121 of the plurality of battery cells 120 are bonded and fixed to the insulating reinforcement plate 130, wherein the first end portion 121 can be integrated with the first adhesive layer, or the first adhesive layer 140 is a double-sided adhesive, thereby enabling double-sided bonding.

[0048] It should be noted that the adhesive layer can be a single-sided adhesive or a double-sided adhesive, and no further restrictions are imposed herein.

[0049] In another specific embodiment, see the attached Figure 3As shown, the first end portion 121 is provided with a metal end surface, and the metal end surface is insulated from the electrode portion 122. The metal end surface is bonded and fixed to the insulating reinforcing plate 130. In this way, the metal end surface can increase the structural hardness of the battery pack 100, and the metal end surface is insulated from the electrode portion 122, which can prevent the first end portion 121 from interfering with the electrical output of the electrode portion 122, thereby improving the operating stability.

[0050] It should be noted that the metal end surface may be, but is not limited to, an aluminum alloy, and may also be a copper alloy, etc. At the same time, the insulation setting method of the metal end surface and the electrode portion 122 may be that at least one of the electrode portion 122 or the metal end surface is provided with a corresponding insulating coating or insulating gasket, etc., wherein the material of the insulating coating or insulating gasket may be silicone, rubber, etc., and no excessive restrictions are made here.

[0051] In some embodiments, see the attached Figure 5 As shown, the battery pack 100 also includes an explosion-proof valve 150. The explosion-proof valve 150 can be installed at any position in the box assembly 110 (such as the inner side of the box assembly 110 close to the battery cell). In this way, gas can be released through the explosion-proof valve 150 to avoid explosion caused by excessive gas in the protective cavity due to excessive temperature of the battery pack 100, thereby improving the stability of battery operation. It is understandable that there can be multiple locations for the explosion-proof valve 150, which can be selected according to actual production needs.

[0052] Specifically, in one example, the explosion-proof valve 150 is spaced apart from the electrode portion 122 at the first end portion 121. The insulating reinforcement plate 130 is provided with a plurality of second avoidance through holes for avoiding the explosion-proof valve 150, and the plurality of second avoidance through holes correspond one to one with the explosion-proof valve 150. In this way, the explosion-proof valve 150 is arranged beside the electrode portion 122 and fixed to the first end portion 121, which is conducive to instantly reducing the air pressure near the electrode portion 122, thereby ensuring that the electrode portion 122 is protected from damage.

[0053] In another example, the explosion-proof valve 150 is arranged at intervals at the bottom of the protection cavity 111, and the bottom of the protection cavity 111 is provided with a plurality of third avoidance through holes for avoiding the explosion-proof valve 150, and the plurality of third avoidance through holes correspond to the explosion-proof valve 150 one by one. In this way, the explosion-proof valve 150 is arranged at the bottom of the protection cavity 111, which is conducive to providing a larger avoidance space for the electrode part 122, avoiding interference with the arrangement of the electrode part 122, and at the same time, the bottom of the protection cavity 111 can be depressurized in time through the explosion-proof valve 150, thereby improving the operating stability of the battery pack.

[0054] In some embodiments, see the attached Figure 6As shown, the battery pack 100 further includes a plurality of transmission members 160 disposed on the insulating reinforcing plate 130, two adjacent transmission members 160 are disposed on the insulating reinforcing plate 130 at intervals, and one transmission member 160 is connected in series with the electrode portions 122 of the plurality of battery cells 120. In this way, the transmission member 160 is used to electrically connect the plurality of electrode portions 122 in series, which can increase the output power of the battery pack 100, thereby improving the circuit transmission efficiency.

[0055] In some other embodiments, see the attached Figure 7 As shown (disassembled schematic diagram, the structure of the flexible circuit board 170 and the insulating circuit board in the actual product is compact), the transmission member 160 includes a flexible circuit board 170 and a plurality of conductive members 180 electrically connected to the flexible circuit board 170. The plurality of conductive members 180 correspond to the electrode portion 122 one by one, and the two are in conductive contact. In this way, the flexible circuit board 170 can be used as a control component, and the one-to-one connection between the conductive member 180 and the electrode portion 122 can be controlled to realize power transmission control of a single specific electrode portion 122, thereby improving the output accuracy of the electrical control.

[0056] It should be noted that the box assembly 110 can be a simple frame assembly or a frame assembly provided with heat dissipation components (such as fan components, liquid cooling plates) and the like, and no further limitation is imposed here. The conductive component 180 can be a wire or a contact point.

[0057] Furthermore, in order to reduce the thickness of the battery pack and improve its integration performance, in some embodiments, the battery pack also includes plastic structural parts, copper-aluminum bars, etc., which are integrated with the flexible circuit board 170 (such as an FPC circuit board) and / or the insulating reinforcement plate 130 to form a CCS bracket. It can be understood that, unlike the single setting of the flexible circuit board 170, the collection wire is electrically connected to the battery cell through the collection wire. At this time, the collection wire generally adopts the traditional copper wire harness solution. The harness is made of plastic surrounded by the outside of the copper wire. When connecting the battery pack, each harness reaches an electrode. When the power battery pack has a lot of current signals, many harnesses are required to cooperate, which occupies a large space. The CCS bracket with integrated settings such as FPC and insulating reinforcement plates is used to replace the collection wires of the power battery, which can reduce the setting of the collection wires and reduce the thickness, and is conducive to customized structure. In addition, during automated assembly, it can be convenient to grab and place it directly on the battery pack through a mechanical arm, with a high degree of automation, suitable for large-scale mass production.

[0058] In order to improve the frame structural strength of the box assembly 110, in combination with any embodiment of the box assembly 110 described above, the box assembly 110 also includes a box body 112 provided with a protective cavity 111. The box assembly 110 also includes at least one reinforcing rib 113 disposed in the protective cavity 111, and the reinforcing rib 113 is in the protective cavity 111 to divide the protective cavity 111 into at least two installation areas 114. A plurality of battery cells 120 are arranged into a group of battery cell assemblies, and at least one group of battery cell assemblies is installed in the installation area 114. In this way, the hardness of the outer frame structure of the battery pack 100 is improved by the provision of the reinforcing rib 113, thereby reducing the risk of impact damage to the battery pack 100. Furthermore, the installation area 114 divided by the reinforcing rib 113 can provide an accommodation space for the arrangement of the battery cell assemblies, so that the arrangement of the battery cell assemblies is more neat and beautiful, and the spatial layout is optimized.

[0059] It should be noted that the number of the reinforcing ribs 113 can be one or more. When the number of the reinforcing ribs 113 is more than one, at least two of the reinforcing ribs 113 can be installed in parallel and at intervals, or in an intersecting manner.

[0060] In combination with any of the above embodiments of the box body 112, see the attached Figure 3 As shown, the box body 112 includes a supporting plate 1121 and a frame 1122. The supporting plate 112 and the frame 1122 enclose a protective cavity 111. The battery pack 100 is provided with a plurality of elastic members 190, and at least one elastic member 190 is sandwiched between two adjacent battery cells 120 so that the battery cell 120 assembly is squeezed and matched with the frame 1122 and the reinforcing ribs 113. In this way, by providing the elastic member 190, the two battery cells 120 are fixed by elastic pressing, which improves the fixing effect between the battery cells 120 and can reduce the impact buffering between the battery cells 120, thereby improving the anti-collision performance of the battery pack 100.

[0061] In some embodiments, in order to improve the heat dissipation performance of the battery pack 100, the carrier plate 1121 may be a liquid-cooled carrier plate 1121, the liquid-cooled carrier plate 1121 is connected to the carrier frame 1122 (may be bonded, welded, etc., or integrally formed, etc.), and the battery cell 120 is disposed in the protective cavity 111. It should be noted that the liquid-cooled carrier plate 1121 may be disposed at any position of the carrier frame 1122.

[0062] It should be noted that the bottom of the battery cell 120 can be bonded and fixed to the liquid cooling support plate 1121, so that the cooling efficiency of the battery cell 120 can be improved, thereby improving the stability of the battery pack 100. The battery cell 120 can also be set in other parts (such as the side wall of the support frame 1122, suspended in the protective cavity 111, and other parts). At the same time, the liquid cooling support plate can be of various types, such as a water cooling support plate, a refrigerant support plate, etc., and no excessive restrictions are made here.

[0063] In one example, the liquid-cooled support plate 1121 can be a water-cooled support plate, in which a fluid channel is provided, which is connected to the fluid channel through the action of an external liquid pump, so that the circulating chilled water is transported to the fluid channel through the liquid pump, so as to achieve heat dissipation at the bottom of the battery cell 120 around the liquid-cooled support plate, around the electrode or other positions, thereby reducing the temperature and improving the stability of operation.

[0064] At the same time, different ways of forming the fluid channels can also make the liquid cooling support plate 1121 form different types, such as: parallel flow tube type liquid cooling belt, stamping type liquid cooling plate, etc., which will not be explained in detail here.

[0065] It should be noted that the connection method between the above-mentioned insulating reinforcement plate 130 and the box body 112 or the reinforcement rib 113 can be but is not limited to bonding, welding, etc., and no excessive restrictions are made here.

[0066] In some embodiments, see the attached Figure 3 As shown, the insulating reinforcing plate 130 is fixedly connected to the box body 112 and / or the reinforcing rib 113. In this way, it is convenient to set up and is conducive to improving processing efficiency. Further, the generation of installation gaps is reduced, thereby improving the operating stability of the battery pack 100.

[0067] In a specific implementation mode, see the attached Figure 3 As shown, the battery cell 120 assembly is bonded and fixed to the carrier plate 1121. In this way, the battery cell 120 assembly is bonded and fixed by the carrier plate 1121, which is conducive to reducing the gap between the battery cell 120 assembly and the carrier plate 1121. At the same time, different from the single matching of the battery cell 120 assembly and the frame 1122, the bearing performance of the carrier plate 1121 is better.

[0068] In another specific embodiment, see the attached Figure 3 As shown, the battery cell 120 assembly is bonded and fixed to the carrier plate 1121 and the frame 1122. In this way, the carrier plate 1121 and the frame are bonded and fixed, which is beneficial to improving the bearing performance of the box body 112, thereby improving the connection strength between the battery cell 120 assembly and the box body 112.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixedly arranged on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Furthermore, when an element is considered to be "fixedly connected to" another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socket connection, screw connection, snap connection, integral molding fixation, welding, etc., which can be achieved in traditional technologies and will not be repeated here.

[0074] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A battery pack, characterized in that: include: A box assembly, provided with a protective cavity and an opening communicating with the protective cavity; A plurality of battery cells, at least part of which is fixed in the protective cavity, the battery cell comprising a first end portion spaced apart from the bottom of the protective cavity and an electrode portion, at least part of which is exposed outside the first end portion; The insulating reinforcement plate is provided with a plurality of first avoidance through holes for avoiding the electrode parts. The insulating reinforcement plate is fixedly connected to the first ends of the plurality of battery cells so that the first avoidance through holes correspond to the electrode parts one by one.

2. The battery pack according to claim 1, characterized in that: The first ends of the plurality of battery cells are bonded and fixed to the insulation reinforcement plate.

3. The battery pack according to claim 2, characterized in that: The battery pack further includes a first adhesive layer, which is sandwiched between the first end and the insulating reinforcing plate to bond and fix the first ends of the plurality of battery cells to the insulating reinforcing plate; And / or, the first end portion is provided with a metal end surface, and the metal end surface is insulated from the electrode portion; the metal end surface is bonded and fixed to the insulation reinforcement plate.

4. The battery pack according to claim 1, characterized in that: The battery pack also includes an explosion-proof valve; The explosion-proof valve is spaced apart from the electrode portion and arranged at the first end; the insulating reinforcement plate is provided with a plurality of second avoidance through holes for avoiding the explosion-proof valve, and the plurality of second avoidance through holes correspond to the explosion-proof valve one by one; Alternatively, the explosion-proof valves are arranged at intervals at the bottom of the protection cavity, and the bottom of the protection cavity is provided with a plurality of third avoidance through holes for avoiding the explosion-proof valves, and the plurality of third avoidance through holes correspond to the explosion-proof valves one by one.

5. The battery pack according to claim 1, characterized in that: The battery pack further includes a plurality of transmission members disposed on the insulating reinforcement plate, two adjacent transmission members are disposed on the insulating reinforcement plate at intervals, and one transmission member is connected in series with electrode portions of a plurality of the battery cells.

6. The battery pack according to claim 5, characterized in that: The transmission element includes a flexible circuit board and a plurality of conductive elements electrically connected to the flexible circuit board; the plurality of conductive elements correspond to the electrode parts one by one, and the two are in conductive contact.

7. The battery pack according to any one of claims 1 to 6, characterized in that: The box assembly also includes a box body provided with the protective cavity; The box assembly also includes at least one reinforcing rib arranged in the protective cavity, and the reinforcing rib is arranged in the protective cavity to divide the protective cavity into at least two installation areas; a plurality of the battery cells are arranged into a group of battery cell assemblies, and at least one group of the battery cell assemblies is installed in the installation area.

8. The battery pack according to claim 7, characterized in that: The box body includes a carrying plate and a frame, and the carrying plate and the frame form the protective cavity; the battery pack is provided with a plurality of elastic members, and at least one elastic member is sandwiched between two adjacent battery cells, so that the battery cell assembly is extruded and matched with the frame and the reinforcing ribs; And / or, the insulating reinforcement plate is fixedly connected to the box body and / or the reinforcement rib.

9. The battery pack according to claim 8, characterized in that: The battery cell assembly is bonded and fixed to the carrier plate; or, the battery cell assembly is bonded and fixed to the carrier plate and the frame.

10. A vehicle, characterized in that: It comprises a frame assembly and the battery pack as claimed in claim 9, wherein the battery pack is mounted on the frame assembly.

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