WO2024040850A1

WO2024040850A1 - Battery pack and electrical device

Info

Publication number: WO2024040850A1
Application number: PCT/CN2022/144280
Authority: WO
Inventors: 席兵荣; 罗峥
Original assignee: 欣旺达动力科技股份有限公司
Priority date: 2022-08-22
Filing date: 2022-12-30
Publication date: 2024-02-29
Also published as: CN218602580U

Abstract

The present application provides a battery pack and an electrical device. The battery pack comprises: a battery cell group, provided with a first sidewall and a second sidewall; an assembling assembly, provided with a first side plate, a second side plate, a first assembling structure and a second assembling structure, wherein the first side plate is provided with a first inner surface facing the first sidewall and fixedly connected to the first sidewall and a first outer surface facing away from the first sidewall, and the first assembling structure is disposed on the first outer surface, and the second side plate is provided with a second inner surface facing the second sidewall and fixedly connected to the second sidewall and a second outer surface facing away from the second sidewall, and the second assembling structure is disposed on the second outer surface; and a box body, provided with a bottom plate and vertical beams disposed opposite each other on the bottom plate in a lengthwise direction of the bottom plate, wherein the bottom plate and the vertical beams form an accommodation chamber for accommodating the battery cell group, and the first assembling structure and the second assembling structure are detachably engaged with the vertical beams on corresponding sides, respectively. The battery pack of the present application facilitates the handling of problematic battery cells, and enables the repair of CTP battery packs.

Description

A battery pack and electrical equipment

This application claims priority to the Chinese patent application submitted to the China Patent Office on August 22, 2022, with the application number 202222215748.6 and the invention title "A battery pack and electrical equipment", the entire content of which is incorporated into this application by reference. middle.

Technical field

This application relates to the field of battery technology, and specifically to a battery pack and electrical equipment.

Background technique

Currently, moduleless technology (Cell To Pack, CTP) can be used to fix multiple cells arranged in sequence in a box to assemble a battery pack. This type of battery pack arranges more cells in a limited space, thereby improving the integration efficiency of the cells, reducing the number of components in the battery pack, and achieving higher battery energy density while reducing the cost of the battery pack. However, each battery cell in this type of battery pack is directly fixed on the box. Since the battery cells in the battery pack are fixed in a manner that is difficult to disassemble, if one battery cell fails, the faulty battery cell cannot be replaced individually. , and the entire battery pack needs to be replaced as a whole, which will lead to a waste of resources and an increase in costs.

Contents of the invention

technical problem

This application provides a battery pack and electrical equipment, which solves the problem that the battery core in the battery pack is difficult to disassemble due to failure, and the entire battery pack needs to be replaced.

Technical solutions

The battery pack according to the first embodiment of the present application includes:

The battery pack has a first side wall and a second side wall in the length direction of the battery pack;

The assembly assembly has a first side plate and a second side plate facing each other, and a first assembly structure and a second assembly structure facing each other; the first side plate has a structure facing the first side wall and fixed to the first side wall. The first inner surface is connected to the first outer surface that is away from the first side wall. The first outer surface is provided with a first assembly structure; the second side plate has a structure facing the second side wall and is fixedly connected to the second side wall. A second inner surface and a second outer surface away from the second side wall, the second outer surface is provided with a second assembly structure; and

The box has a bottom plate and vertical beams arranged opposite to the bottom plate along the length direction of the bottom plate. The bottom plate and the vertical beams form an accommodation chamber for accommodating the battery pack. The first assembly structure and the second assembly structure are respectively connected with the corresponding side. Vertical beams can be disassembled and fitted.

According to the electrical equipment in the second embodiment of the present application, the electrical equipment includes the above-mentioned battery pack.

beneficial effects

The battery pack according to the embodiment of the present application has at least the following technical effects:

In the embodiment of the present application, a first side plate and a second side plate are fixedly connected to the battery pack, a first assembly structure is provided on the first side plate, and a second assembly structure is provided on the second side plate. The assembly structure and the second assembly structure can be detachably matched with the vertical beams on the corresponding sides of the box, thereby fixing the battery pack in the box. While improving the energy density of the battery pack, when there is a problem with the battery pack, it can also be passed through the vertical beam. The detachable cooperation between the beam and the first assembly structure and the second assembly structure allows the problem battery pack to be taken out, thereby only replacing a single battery pack without having to replace the entire battery pack, making the battery pack detachable and convenient for the battery pack. Rework.

In addition, in the embodiment of the present application, a first side plate and a second side plate are provided between the battery pack and the box. The first side plate and the second side plate not only serve to connect and fix the box and the battery pack, but also In addition, the battery core is not directly in contact with the box and the acceleration force received by the box can be transmitted through the side plate without directly acting on the battery core, thus improving the protection level of the battery core.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a side view of a battery pack according to an embodiment of the present application;

Figure 2 is an exploded view of a battery pack according to an embodiment of the present application;

Figure 3 is a front view of a battery pack according to an embodiment of the present application;

Figure 4 is a schematic diagram of the battery pack and assembly components of the battery pack according to an embodiment of the present application;

Figure 5 is a schematic diagram of a box of a battery pack according to an embodiment provided by this application;

Figure 6 is a front view of a battery pack according to another embodiment of the present application.

The marks in the figure are respectively: 1 is the battery pack, 11 is the first side wall, 12 is the second side wall, 13 is the base surface, 21 is the first side plate, 22 is the second side plate, 211 is the first The inner surface, 212 is the first outer surface, 213 is the first end, 214 is the second end, 221 is the second inner surface, 222 is the second outer surface, 223 is the third end, 224 is the fourth end, 3 is Box body, 31 is the bottom plate, 32 is the first vertical beam, 33 is the second vertical beam, 34 is the vertical beam, 41 is the first raised part, 42 is the second raised part, 43 is the third raised part, 44 is the fourth protrusion, 51 is the first engaging groove, 52 is the second engaging groove, 53 is the third engaging groove, 54 is the fourth engaging groove, 61 is the first adhesive layer, 62 is The second adhesive layer, 7 is thermal conductive paste, 81 is the first adhesive part, 82 is the second adhesive part, 83 is the third adhesive part, 84 is the fourth adhesive part, and 9 is the hollow structure.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of this application. In addition, it should be understood that the specific embodiments described here are only used to illustrate and explain the application, and are not used to limit the application. In this application, unless otherwise stated, the directional words used such as "upper", "lower", "left" and "right" usually refer to the upper, lower and left positions of the device in actual use or working state. and right, specifically the drawing direction in the attached drawing.

Embodiments of the present application provide a battery pack and electrical equipment. Each is explained in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments.

The embodiment of the present application provides a battery pack, including: a battery pack 1 with a first side wall 11 and a second side wall 12 in the length direction of the battery pack 1 (front and rear directions in Figure 1); assembly; The assembly has a first side plate 21 and a second side plate 22 arranged oppositely, and a first assembly structure and a second assembly structure arranged oppositely; the first side plate 21 has a structure facing the first side wall 11 and connected with the first The first inner surface 211 of the side wall 11 is fixedly connected to the first outer surface 212 that is away from the first side wall 11. The first outer surface 212 is provided with a first assembly structure; the second side plate 22 has a structure facing the second side. The second inner surface 221 of the wall 12 is fixedly connected to the second side wall 12 and the second outer surface 222 is away from the second side wall 12. The second outer surface 222 is provided with a second assembly structure; and the box body 3 , has a bottom plate 31 and vertical beams 34 arranged opposite to the bottom plate 31 along the length direction of the bottom plate 31. The bottom plate 31 and the vertical beams 34 form an accommodation chamber for accommodating the battery pack 1. The first assembly structure and the second assembly structure They are detachably matched with the vertical beams 34 on the corresponding sides respectively. In this application, a first side plate 21 and a second side plate 22 are fixedly connected to the battery pack 1, and a first assembly structure is provided on the first side plate 21, and a second assembly structure is provided on the second side plate 22. , the first assembly structure and the second assembly structure can be detachably matched with the vertical beam 34 on the corresponding side, thereby fixing the battery core group 1 in the box 3. When there is a problem with the battery core, the first assembly structure and the second assembly structure can be detachably matched with the vertical beam 34 on the corresponding side. The detachable cooperation between the assembly structure and the vertical beam 34 allows the problem battery pack to be taken out, thereby only replacing a single battery pack without having to replace the entire battery pack, making the battery pack detachable and convenient for battery pack repair; in addition, the second The one side plate 21 and the second side plate 22 not only play a role in connecting and fixing the box 3 and the battery core group 1, but also prevent the battery core from directly contacting the box and receiving force. The acceleration force on the box can pass through the side plates. It is transmitted without directly acting on the battery core, thereby improving the protection level of the battery core.

Please refer to Figures 1 and 2. The battery pack 1 includes a plurality of cells arranged in sequence from front to back and stacked along its own thickness direction (front and back directions in Figure 1). Adjacent battery cells are bonded and fixed. Multiple battery cells are electrically connected in series and/or parallel, whereby multiple scattered battery cells are fixed to each other to form a battery core group.

The length direction of the battery pack 1 is the direction in which the battery cells are arranged from front to back. Adjacent battery cells are pasted and fixed, and there are no redundant partitions between adjacent battery cells, so that more batteries can be accommodated in the battery core group. As a result, the energy density of the battery core group is higher and it can provide energy for electric vehicles. It should be noted that the battery cells in this application can also be stacked along their length direction to form the battery core group 1 .

The box 3 includes a first vertical beam 32 , a second vertical beam 33 and a bottom plate 31 . The first vertical beam 32 , the second vertical beam 33 and the bottom plate 31 form a chamber for accommodating the battery pack 1 . The structural cooperation method of the first vertical beam 32, the second vertical beam 33 and the bottom plate 31 can be integrally formed, welded, glued, etc. The above methods are only examples and are not limited to the methods described in this patent. By arranging the box 3, multiple battery core groups can be combined together to facilitate combined utilization of the battery core groups.

The assembly assembly includes a first side plate 21 and a second side plate 22 . The contact surface between the first side plate 21 and the second side plate 22 and the battery core group 1 is a flat surface, or a surface that matches the battery core group 1 .

The side plates are made of non-metallic materials. The density of non-metallic materials is generally lower than that of metal materials. This can further reduce the weight of the battery pack and improve the insulation protection performance of the side plates. Specifically, the material of the side panel is PC (polycarbonate), PPS (polyphenylene sulfide), PPO (polyphenylene ether), PMAA (polymethacrylic acid) or PA66 (polyhexamethylene adipamide). A sort of. These materials have the characteristics of lower density and higher strength. When used in battery packs, they can reduce the weight of the battery pack while ensuring the structural strength of the battery pack. Of course, the materials of the first side plate 21 and the second side plate 22 can also be metal materials.

Please refer to Figures 3 to 5. When the battery pack 1 is placed in the box 3, the first side plate 21 is located between the battery pack 1 and the first vertical beam 32, and the second side plate 22 is located between the battery pack 1 and the first vertical beam 32. and the second vertical beam 33 , the base surface 13 of the battery pack 1 is located on the bottom plate 31 of the box 3 . The first side plate 21 has a first inner surface 211 facing the first side wall 11 and fixedly connected with the first side wall 11 and a first outer surface 212 away from the first side wall 11 . The first outer surface 212 has a There is a first assembly structure; the second side plate 22 has a second inner surface 221 facing the second side wall 12 and fixedly connected with the second side wall 12 and a second outer surface 222 away from the second side wall 12. The second outer surface 222 is provided with a second assembly structure. The first vertical beam 32 is cooperatively connected with the first assembly structure, and the second vertical beam 33 is cooperatively connected with the second assembly structure. By arranging the first assembly structure and the second assembly structure, it is possible to avoid the problem in the prior art that the battery cell fixation method is difficult to disassemble, and if there is a problem, it cannot be disassembled and repaired individually, and the whole package can only be scrapped.

Furthermore, a hollow structure 9 may be provided inside the first side plate 21 and the second side plate 22. One or more hollow structures 9 may be provided. The hollow structure 9 may be provided inside the first side plate 21 and the second side plate 22. , reducing the materials required for side panel molding can reduce costs while ensuring a certain strength.

In some embodiments of the present application, the first side plate 21 has a first end 213 away from the bottom plate 31 , the first assembly structure includes a first protrusion 41 formed on the first end 213 , and the first vertical beam 32 is provided with There is a first engaging groove 51 , and the first protruding portion 41 is engaged and connected with the first engaging groove 51 . Specifically, the first protruding portion 41 is a bent protruding portion facing toward the bottom plate 31 . A convex bending structure is provided on the upper part of the first side plate 21 to increase the creepage distance between the box and the battery poles and improve battery safety. The detachable cooperation between the first side plate 21 and the first vertical beam 32 can be achieved through the mechanical structural cooperation between the first protrusion 41 and the first engaging groove 51, or through external force, such as cutting off the first protrusion. The raised portion 41 realizes the detachable cooperation between the first side plate 21 and the first vertical beam 32 . In some embodiments of the present application, the extending direction of the first protruding portion 41 is substantially parallel to the height direction of the first side plate 21 . Substantially parallel as used herein means completely parallel or almost completely parallel, for example, within 10° of completely parallel. The extending direction of the first protruding portion 41 is substantially parallel to the height direction of the first side plate 21 , which can make the connection between the first side plate 21 and the first vertical beam 32 tighter, and the first engaging groove 51 accommodates The glue is not easy to flow out. The extension direction of the first protrusion 41 may also be in other directions, for example, 30°, 60°, or 90° with the height direction of the first side plate 21 .

In some embodiments of the present application, the first side plate 21 has a second end 214 close to the bottom plate 31 , the first assembly structure includes a third protrusion 43 formed on the second end 214 , and the first vertical beam 32 A third engaging groove 53 is provided on the upper body, and the third protruding portion 43 is engaged and connected with the third engaging groove 53 . Specifically, the third protruding portion 43 is a protruding portion facing the bottom plate 31 . This further improves the stability of the battery pack assembly and prevents the battery pack from shaking in the box. The detachable cooperation between the first side plate 21 and the first vertical beam 32 can be achieved through the mechanical structural cooperation between the third protrusion 43 and the first engaging groove 53, or through external force, such as cutting off the first protrusion. The raised portion 43 realizes the detachable cooperation between the first side plate 21 and the first vertical beam 32 .

In some embodiments of the present application, the extension direction of the third protrusion 43 is substantially parallel to the height direction of the first side plate 21 . Substantially parallel as used herein means completely parallel or almost completely parallel, for example, within 10° of completely parallel. The extending direction of the third protruding portion 43 is substantially parallel to the height direction of the first side plate 21. Preferably, the extending directions of the third protruding portion 43 and the first protruding portion 41 are parallel, so that the first side plate 21 can be aligned with the height direction of the first side plate 21. The connection of the first vertical beam 32 is tighter, and the glue contained in the third clamping groove 53 is not easy to flow out. The extending direction of the third protruding portion 43 may also be in other directions, for example, 30°, 60°, or 90° with the height direction of the first side plate 21 .

In some embodiments of the present application, the second side plate 22 has a third end 223 away from the bottom plate 31 , the second assembly structure includes a second protrusion 42 formed on the third end 223 , and the second vertical beam 33 is provided with There is a second engaging groove 52 , and the second protruding portion 42 is engaged and connected with the second engaging groove 52 . Specifically, the second protruding portion 42 is a bent protruding portion facing toward the bottom plate 31 . A convex bending structure is provided on the upper surface of the second side plate 22 to increase the creepage distance between the box and the battery poles and improve battery safety. The detachable cooperation between the second side plate 22 and the second vertical beam 33 can be achieved through the mechanical structural cooperation between the second protrusion 42 and the second snap-in groove 52, or by external force, such as cutting off the second protrusion. The raised portion 42 realizes the detachable cooperation between the second side plate 22 and the second vertical beam 33 .

In some embodiments of the present application, the extending direction of the second protruding portion 42 is substantially parallel to the height direction of the second side plate 22 . Substantially parallel as used herein means completely parallel or almost completely parallel, for example, within 10° of completely parallel. The extending direction of the second protruding portion 42 is substantially parallel to the height direction of the second side plate 22 , which can make the connection between the second side plate 22 and the second vertical beam 33 tighter, and the second engaging groove 52 accommodates The glue is not easy to flow out. The extension direction of the second protrusion 42 may also be in other directions, for example, 30°, 60°, or 90° with the height direction of the second side plate 22 .

In some embodiments of the present application, the second side panel 22 has a fourth end 224 close to the bottom panel 31 , the second assembly structure includes a fourth protrusion 44 formed on the fourth end 224 , and the second vertical beam 33 A fourth engaging groove 54 is provided thereon, and the fourth protruding portion 44 is engaged and connected with the fourth engaging groove 54 . Specifically, the fourth protruding portion 44 is a protruding portion facing the bottom plate 31 . This further improves the stability of the battery pack assembly and prevents the battery pack from shaking in the box. The detachable cooperation between the second side plate 22 and the second vertical beam 33 can be achieved through the mechanical structural cooperation between the fourth protrusion 44 and the fourth engaging groove 54, or by external force, such as cutting off the fourth protrusion. The raised portion 44 realizes the detachable cooperation between the second side plate 22 and the second vertical beam 33 .

In some embodiments of the present application, the extending direction of the fourth protruding portion 44 is substantially parallel to the height direction of the second side plate 22 . Substantially parallel as used herein means completely parallel or almost completely parallel, for example, within 10° of completely parallel. The extending direction of the fourth protruding portion 44 is substantially parallel to the height direction of the second side plate 22. Preferably, the extending directions of the fourth protruding portion 44 and the second protruding portion 42 are parallel, so that the second side plate 22 can be parallel to the height direction of the second side plate 22. The connection of the second vertical beam 33 is tighter, and the glue contained in the fourth clamping groove 54 is not easy to flow out. The extension direction of the fourth protrusion 44 may also be in other directions, for example, 30°, 60°, or 90° with the height direction of the second side plate 22 .

In some embodiments of the present application, the plane where the first side plate 21 and the second side plate 22 cooperate with the first vertical beam 32 and the second vertical beam 33 of the box 3 can be designed to be perpendicular to the plane of the bottom plate 31, or It can be an inclined surface at a certain angle with the bottom plate 31, or a stepped surface, etc.

In some embodiments of the present application, the battery pack further includes a first adhesive layer 61 through which the first inner surface 211 of the first side plate 21 is adhered to the first side wall 11 of the battery pack. Junction; the battery pack also includes a second adhesive layer 62, and the second inner surface 221 of the second side plate 22 is bonded to the second side wall 12 of the battery pack through the second adhesive layer 62. Specifically, the first adhesive layer 61 and the second adhesive layer 62 can use thermally conductive structural glue, AB glue or UV glue to bond and fix the battery core group 1 to the first side plate 21 and the second side plate 22 .

In some embodiments of the present application, the first side plate 21 or the second side plate 22 is transparent, and the first side plate 21 or the second side plate 22 is bonded and fixed with the battery pack 1 through UV glue. Or after the second side panel 22 is coated with UV glue, it is attached and pressed tightly to the battery pack 1, and the external ultraviolet light passes through the transparent first side panel 21 or the second side panel 22, which can make the first side panel 21 or The UV glue between the second side plate 22 and the battery pack 1 is quickly cured. By using UV glue, the glue curing time is reduced, the installation speed of the first side plate 21 or the second side plate 22 is accelerated, thereby improving the production efficiency of the battery pack and reducing the production cost.

In some specific embodiments of the application, the material of the first side plate 21 or the second side plate 22 is transparent PC or transparent acrylic that can transmit 20% to 98% of ultraviolet light with a wavelength of 200nm to 420nm. The plate 21 or the second side plate 22 is injection molded.

In some embodiments of the application, the first side plate 21 or the second side plate 22 is bonded and fixed with the battery core group through AB glue. At this time, the first side plate 21 or the second side plate 22 can be transparent. Can also be opaque. After the first side plate 21 or the second side plate 22 is coated with AB glue, it is attached and pressed to the battery pack 1. It is heated while pressing to make the AB glue solidify quickly. Heating can reduce the glue curing time and improve production. efficiency.

In some embodiments of the application, the first side plate 21 or the second side plate 22 is bonded and fixed with the battery core group through thermally conductive structural glue. At this time, the first side plate 21 or the second side plate 22 can be transparent. , can also be opaque. After the first side plate 21 or the second side plate 22 is coated with thermally conductive structural adhesive, it is attached and pressed tightly to the battery pack 1. The use of thermally conductive structural adhesive can improve the connection between the battery pack 1 and the first side plate 21 or the second side plate. The heat transfer performance between 22% further improves the heat dissipation performance of the battery pack.

In some embodiments of the present application, the plane where the first side plate 21 or the second side plate 22 contacts the battery pack 1 is provided with an anti-overflow glue structure. The anti-overflow glue structure includes glue grooves, raised ribs, etc.

In some embodiments of the present application, the battery pack 1 has a base surface 13 opposite to the bottom plate 31 , and the battery pack includes thermal conductive paste 7 . The thermal conductive paste 7 is respectively attached to the bottom plate 31 and the base surface 13 , even if the battery pack is subject to vibration. The battery cells are not easy to move due to impact and impact; the use of thermal paste can improve the heat transfer performance between the battery pack and the bottom plate, further improving the heat dissipation performance of the battery pack.

In some embodiments of the present application, the battery pack includes a first bonding part 81 , a second bonding part 82 , a third bonding part 83 or a fourth bonding part 84 , the first bonding part 81 bonds the first The engaging part of the engaging groove 51 and the first protruding part 41 is bonded with the second bonding part 82 and the engaging part of the second engaging groove 52 with the second protruding part 42 is bonded with the third bonding part 83 The fourth bonding portion 84 bonds the engaging portion of the third engaging groove 53 and the third protruding portion 43 to the engaging portion of the fourth engaging groove 54 and the fourth protruding portion 44 . Specifically, the first bonding part 81 , the second bonding part 82 , the third bonding part 83 or the fourth bonding part 84 include thermally conductive structural glue, AB glue or UV glue. The glue located in the first engaging groove 51, the second engaging groove 52, the third engaging groove 53 or the fourth engaging groove 54 is not easy to flow around. In addition, the first engaging groove 51, the second engaging groove 52. The third engaging groove 53 or the fourth engaging groove 54 accommodates a certain thickness of glue to ensure that the bonding force between the first side plate 21 and the second side plate 22 and the box 3 meets the design requirements.

In some embodiments of the present application, the longitudinal section of the first snap-in groove 51 , the second snap-in slot 52 , the third snap-in slot 53 or the fourth snap-in slot 54 may be U-shaped, flat-bottomed, or round-bottomed. etc., the above shapes are only examples and are not intended to be limitations of the method described in this patent.

Please refer to Figures 3 and 6. There are at least two battery packs 1, and two adjacent battery packs 1 are arranged side by side along the width direction of the battery pack 1 (in the left and right directions in Figure 1). Two vertical beams can be set between two adjacent battery packs 1, and the two vertical beams are respectively provided with a set of snap-in slots to match the assembly structure of a side plate; a single vertical beam can be set between two adjacent battery packs 1. Beam, a single vertical beam is provided with two sets of snap-in slots to match the assembly structure of the adjacent battery pack side plates. Specifically, the vertical beam is located between the two battery core groups, and the left and right sides of the vertical beam are in contact with the side plates of the two battery core groups respectively. One end of the vertical beam away from the bottom plate is provided with two snap-in slots, which are matched and connected to the assembly structures on the side plates of the two battery packs. One end of the vertical beam close to the bottom plate is provided with two snap-in slots, which are matched and connected to the assembly structures on the side plates of the two battery packs, so that adjacent battery packs can be fixedly connected to the single vertical beam. This saves materials, reduces material costs, and reduces the weight of the battery pack.

In some embodiments of the present application, the first assembly structure and the first side plate 21 can be combined in an integrated manner, welded, glued, etc., and the second assembly structure and the second side plate 22 can be combined in an integrated manner, welded, etc. , glue joints, etc.

In some embodiments of the present application, multiple other assembly structures can also be provided, and the recessed engaging grooves of the vertical beams that cooperate with them can also be increased or decreased accordingly. For example, a fifth protruding portion can also be provided at a position between the first protruding portion 41 and the third protruding portion 43 of the first side plate 21, and a fifth engaging groove is formed on the first vertical beam 32. The five protruding parts are matched and connected with the fifth snap-in groove. By providing the fifth protrusion, the connection between the first side plate 21 and the first vertical beam 32 is strengthened, thereby limiting the movement of the battery pack when the battery pack vibrates.

In some embodiments of the present application, the assembly assembly may also include a first end plate and a second end plate that are oppositely arranged along the width direction of the battery pack 1 (left and right directions in Figure 1 ). The first side plate 21, the second side plate 22, the first end plate and the second end plate are assembled end to end to form a closed frame surrounding the battery core. Both the first end plate and the second end plate can form an assembly structure. , connected with the vertical beam.

In specific implementation, the assembly steps of the battery pack include:

(1) Several batteries are arranged and positioned by stacking tooling;

(2) Apply glue (thermal conductive structural glue, AB glue or UV glue) to the first side panel 21 and the second side panel 22, bond and fix them with the battery core, and form a group after the glue solidifies;

(3) Apply thermal paste 7 on the plane of the bottom plate of the box, and put an appropriate amount of glue (structural glue, AB glue or UV glue);

(4) Put the battery pack 1 into the box and fix it: Insert the assembly structure of the side panel into the clamping groove of the vertical beam, and press down with the tooling to maintain the pressure until the glue is completely solidified.

Using the above-mentioned battery pack structure, the assembly has high operability, is easy to assemble, and reduces labor costs.

An embodiment of the present application also provides an electrical device, which includes the above-mentioned battery pack. By using the above-mentioned battery pack, it is beneficial to reduce the cost of electrical equipment and extend the service life of electrical equipment.

The embodiment of the present application provides a battery pack and electrical equipment. In this application, a first side plate and a second side plate are fixedly connected to the battery pack, and a first assembly structure is provided on the first side plate. A second assembly structure is provided on the second side plate. The first vertical beam of the box is cooperatively connected to the first assembly structure. The second vertical beam of the box is cooperatively connected to the second assembly structure, thereby fixing the battery pack to the box. When there is a problem with the battery core, the battery pack can be taken out by cutting off the protruding first assembly structure and the second assembly structure, making the battery pack detachable and convenient for battery pack repair; CTP technology is used to remove the battery pack. Assemble with the box to reduce the weight of the battery pack and increase the energy density of the battery pack.

The above is a detailed introduction to a battery pack and electrical equipment provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. Methods and their core ideas; at the same time, for those of ordinary skill in the field, there will be changes in the specific implementation methods and application scope based on the ideas of this application. In summary, the content of this specification should not be understood as an infringement of this application. Application restrictions.

Claims

A battery pack, characterized by including:

A battery core group, which includes a first side wall and a second side wall in the length direction;

The assembly assembly has a first side plate and a second side plate arranged oppositely, and a first assembly structure and a second assembly structure arranged oppositely; the first side plate has a structure facing the first side wall and connected with the first side wall. The first inner surface of the first side wall is fixedly connected to the first outer surface that is away from the first side wall, and the first assembly structure is provided on the first outer surface; the second side plate It has a second inner surface facing the second side wall and fixedly connected with the second side wall and a second outer surface away from the second side wall, and the second assembly structure is arranged on the second side wall. 2. On the outer surface; and

The box has a bottom plate and vertical beams arranged opposite to the bottom plate along the length direction of the bottom plate. The bottom plate and the vertical beams form an accommodation chamber for accommodating the battery core group, and the first The assembly structure and the second assembly structure are detachably matched with the vertical beams on the corresponding sides.
The battery pack according to claim 1, wherein the vertical beam includes a first vertical beam that can be detachably matched with the first assembly structure;

The first side plate has a first end and a second end in a height direction, the first assembly structure includes a first protrusion formed on the first end, and the first vertical beam is provided with The first latching groove, the first protruding portion is latched and connected with the first latching groove.
The battery pack according to claim 2, wherein the first assembly structure includes a third protrusion formed on the second end, and a third engaging groove is provided on the first vertical beam, so The third protruding portion is engaged and connected with the third engaging groove.
The battery pack according to claim 2, wherein the extension direction of the first protrusion is substantially parallel to the height direction of the first side plate.
The battery pack according to claim 3, wherein the extension direction of the third protrusion is substantially parallel to the height direction of the first side plate.
The battery pack according to claim 2 or 4, characterized in that the battery pack includes a first bonding portion, the first bonding portion bonds the first engaging groove and the first protrusion. The joint at the bottom.
The battery pack according to claim 3 or 5, characterized in that the battery pack includes a third bonding portion, the third bonding portion bonds the third engaging groove and the third protrusion. The joint at the bottom.
The battery pack according to any one of claims 1 to 7, wherein the vertical beam includes a second vertical beam that can be detachably matched with the second assembly structure;

The second side plate has a third end and a fourth end in the height direction, the second assembly structure includes a second protrusion formed on the third end, and the second vertical beam is provided with a third end. Two latching grooves, the second protruding portion is latched and connected with the second latching groove.
The battery pack according to claim 8, wherein the second assembly structure includes a fourth protrusion formed on the fourth end, and a fourth engaging groove is provided on the second vertical beam. The fourth protruding portion is engaged and connected with the fourth engaging groove.
The battery pack according to claim 8, wherein the extension direction of the second protrusion is substantially parallel to the height direction of the second side plate.
The battery pack according to claim 9, wherein the extending direction of the fourth protrusion is substantially parallel to the height direction of the second side plate.
The battery pack according to claim 8 or 10, characterized in that the battery pack includes a second bonding part, and the second bonding part bonds the second engaging groove and the second protrusion. The joint at the bottom.
The battery pack according to claim 9 or 11, characterized in that the battery pack includes a fourth bonding portion, the fourth bonding portion bonds the fourth engaging groove and the fourth protrusion. The joint at the bottom.
The battery pack according to any one of claims 1 to 13, wherein the battery pack further includes a first adhesive layer, and the first inner surface is connected to the third adhesive layer through the first adhesive layer. One side wall is bonded.
The battery pack according to any one of claims 1 to 14, wherein the battery pack further includes a second adhesive layer, and the second inner surface is connected to the third adhesive layer through the second adhesive layer. The two side walls are bonded together.
The battery pack according to any one of claims 1 to 15, characterized in that there are at least two battery packs and the battery packs are arranged side by side, with a One of the vertical beams, the adjacent battery core group is detachably matched with the vertical beam through the assembly assembly.
The battery pack according to any one of claims 1 to 16, wherein the first assembly structure is integrally provided with the first side plate.
The battery pack according to any one of claims 1 to 17, wherein the second assembly structure is integrally provided with the second side plate.
An electrical device, characterized by comprising the battery pack according to any one of claims 1 to 18.