Battery module, battery pack, electrical device, and method for manufacturing the same

Abstract

To provide a battery module, a battery pack, an electric device, and a manufacturing method of the same, which are capable of solving the problems of complexity, a large number of parts, difficulties in manufacturing processes, and a significant reduction in reliability of a product in the design of a battery cell group.SOLUTION: The present disclosure provides a battery module, a battery pack, an electrical device, and a fabricating method of the same. The battery module includes a battery cell group including a top layer battery cell group and a non-top layer battery cell group, and a bracket. The battery cell group includes a battery cell arranged in a first direction, the bracket includes an intermediate bracket and a top layer bracket. The intermediate bracket is disposed between a top layer battery cell group and a non-top layer battery cell group / between the battery cell group of two adjacent layers of the non-top layer battery cell group. The top layer bracket is disposed on a side away from the non-top layer battery cell group. A first housing groove is installed along a stacking direction of the battery cell group, and the first housing groove is arranged in the first direction to fix adjacent battery cells therein.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This disclosure claims the priority of Chinese patent applications with application numbers 202410552006.3 and 202420960374.7 respectively, filed with the China National Intellectual Property Administration on May 6, 2024, and the entire contents of the above applications are incorporated herein by reference. This disclosure relates to the field of battery technology, specifically to battery modules, battery packs, electrical devices, and their manufacturing methods.

Background Art

[0002] In order to give a battery module a high capacity, the battery module is usually composed of a plurality of battery cells in a plurality of parallel and series configurations.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, in related module designs, it is complex to stack battery cells to design a battery cell group, with relatively many components, a high manufacturing process difficulty, and a significant reduction in product reliability.

Means for Solving the Problems

[0004] This disclosure provides a battery module. The battery module includes a group of battery cells and a bracket, the group of battery cells including a top layer group of battery cells and a non-top layer group of battery cells, each layer of battery cell groups including a plurality of battery cells arranged along a first direction, the bracket including an intermediate bracket and a top layer bracket, the intermediate bracket being installed between the top layer group of battery cells and the non-top layer group of battery cells and / or between two adjacent layers of battery cell groups of the non-top layer group, the top layer bracket being installed on the side of the top layer group of battery cells away from the non-top layer group of battery cells, a plurality of first housing grooves being installed on the sides of the intermediate bracket and the top layer bracket that are closer to the battery cell groups along the stacking direction of the battery cell groups, the plurality of first housing grooves being installed so as to be arranged along the first direction, each of the plurality of first housing grooves corresponding one-to-one with a plurality of battery cells in an adjacent battery cell group, and the battery cells being fixed in the corresponding first housing groove.

[0005] This disclosure provides a method for manufacturing a battery module. The method for manufacturing the battery module includes providing a bracket, the bracket comprising an intermediate bracket and a top layer bracket, wherein a plurality of first housing grooves are provided on opposing sides of the intermediate bracket and on one side of the top layer bracket, and the plurality of first housing grooves are arranged along a first direction; providing a battery cell, fixing the battery cell within the bracket, and placing the battery cell within the first housing grooves, such that the plurality of first housing grooves and the plurality of battery cells correspond one-to-one; providing an adhesive, and placing the adhesive between the first housing grooves and the battery cell; stacking and installing the top layer bracket and the intermediate bracket, such that the first housing groove of the top layer bracket is positioned toward the intermediate bracket adjacent to the first housing groove; and providing a bus bar, connecting the positive and negative electrodes of the battery cell by the bus bar, thereby obtaining a battery module.

[0006] This disclosure provides a battery pack. The battery pack includes a housing and a battery module, wherein the housing includes a lid and a housing, the lid is placed over the housing, and the battery module is installed inside the housing.

[0007] This disclosure provides a battery pack. A method for manufacturing the battery pack includes providing the battery module and providing a housing, the housing including a lid and a casing, wherein a plurality of second housing grooves are provided on the inner bottom of the casing along a first direction, the battery module is placed inside the casing, the battery cells on the side of the battery module away from the top layer bracket are placed inside the second housing grooves, and adhesive is provided between the second housing grooves and the battery cells inside the second housing grooves, and the lid is placed over the casing to obtain the battery pack.

[0008] This disclosure provides an electrical device. The electrical device is The battery module, or the battery pack, or the battery module. [Effects of the Invention]

[0009] The battery module provided in this disclosure includes an intermediate bracket installed between two adjacent layers of battery cell groups, a top layer bracket installed on the side of the top layer battery cell group away from the non-top layer battery cell group, and the circumferential surfaces of the battery cells are fixed in first housing grooves on both sides of the intermediate bracket and in the first housing groove on the side of the top layer bracket closer to the battery cell group. This enables rapid and stable fixing of the battery cells, thereby simplifying the battery cell fixing structure, reducing the number of parts, simplifying the process, and lowering costs.

[0010] The method for manufacturing a battery module provided in this disclosure involves placing the battery cells in a first housing groove and applying adhesive between the battery cells and the first housing groove, thereby enabling the battery cells to be quickly and stably fixed to the bracket. This method is simple in process, has a simple structure, reduces the number of parts, and lowers costs.

[0011] The method for manufacturing a battery pack provided in this disclosure allows for the rapid and stable fixation of the battery module within the housing by placing an adhesive between the second housing groove and the battery cell in the second housing groove, and the process is simple. [Brief explanation of the drawing]

[0012] [Figure 1] This is a structural diagram of a battery module provided by an embodiment of the present disclosure. [Figure 2] This is a structural diagram of an intermediate bracket provided by an embodiment of the present disclosure. [Figure 3] This is a structural diagram of the top layer bracket provided by the embodiments of this disclosure. [Figure 4] This is a structural diagram of a group of non-top layer battery cells provided by the embodiments of this disclosure. [Figure 5] This is an exploded view of a battery pack provided by an embodiment of the present disclosure. [Figure 6] This is a structural diagram of the enclosure provided by the embodiments of this disclosure. [Modes for carrying out the invention]

[0013] In the description of this disclosure, unless otherwise explicitly provided and limited, the terms “connected,” “joined,” and “fixed” should be interpreted broadly, for example, by fixed connection, detachable connection, becoming one, mechanical connection, electrical connection, direct connection, indirect connection through an intermediate medium, or by internal communication or interaction relationship between two elements. A person skilled in the art will be able to understand the specific meaning of the above terms in this disclosure depending on the specific circumstances.

[0014] In this description, terms such as "up," "down," "left," "right," "front," and "back" refer to directions or positional relationships as shown in the drawings, and are used to simplify explanation and operation. They do not imply or suggest that the shown devices or elements have a specific direction, are configured in a specific direction, or must be operated in a specific direction. Furthermore, the terms "first" and "second" are used for explanatory distinction and have no special meaning.

[0015] In the first embodiment, with reference to Figures 1 to 4, an embodiment of the present disclosure provides a battery module. The battery module includes a group of battery cells and a bracket, the group of battery cells includes a top layer group of battery cells and a non-top layer group of battery cells, each layer of the group of battery cells includes a plurality of battery cells 10 arranged along a first direction A, the bracket includes an intermediate bracket 20 and a top layer bracket 30, the intermediate bracket 20 is installed between the top layer group of battery cells and the non-top layer group of battery cells and / or between two adjacent layers of the non-top layer group of battery cells, and the top layer bracket The racket 30 is installed on the side of the top layer battery cell group away from the non-top layer battery cell group, and along the stacking direction B of the battery cell group, multiple first housing grooves 21 are installed on the sides of the intermediate bracket 20 and the top layer bracket 30 that are close to the battery cell group, and the multiple first housing grooves 21 are installed so as to be arranged along the first direction A, and each of the multiple first housing grooves 21 corresponds one-to-one with multiple battery cells 10 of the adjacent battery cell group, and the battery cells 10 are fixed in the first housing groove 21 corresponding to it.

[0016] A battery cell group includes a plurality of battery cells 10 arranged along a first direction A, and it can be understood that the axial directions of the plurality of battery cells 10 are perpendicular to the first direction A. Electrodes of the same polarity in a plurality of battery cells 10 in the same layer of a battery cell group may be located on the same side or different sides of the battery cell group. Exemplarily, in a plurality of battery cells 10 in the same layer of a battery cell group, electrodes of the same polarity in two adjacent battery cells 10 are located on different sides of the battery cell group. The shape of the first housing groove 21 may be a standard geometric shape such as a semicircle, arc, square, or rectangle. Exemplarily, the shape of the first housing groove 21 can conform to the circumferential shape of the battery cell 10, thereby providing more stable fixation of the first housing groove 21 to the battery cell 10. The dimensions of the first housing groove 21 may be set as needed, as long as it can accommodate the circumferential surface of the battery cell 10 that is exposed within the first housing groove 21. The number of first housing compartments 21 corresponds to the number of battery cells 10. For example, the first storage tank 21 and the battery cell 10 may have a 1:N relationship, where N is a positive integer greater than or equal to 1. When N is 1, the first storage tank 21 and the battery cell 10 have a one-to-one correspondence, and it can be understood that this one-to-one correspondence provides good stability through the fixing of the battery cell 10. The number of layers of the battery cell group may be set as needed. The shape of the battery cell 10 may be cylindrical, square, or other shapes. The non-top layer battery cell group may include a single layer of battery cells or a multi-layer battery cell group. The non-top layer battery cell group includes a single layer of battery cells, and the intermediate bracket 20 is installed between the top layer battery cell group and the non-top layer battery cell group. The non-top layer battery cell group includes multiple layers of battery cells, and the intermediate bracket 20 may be installed between the top layer battery cell group and the non-top layer battery cell group, between two adjacent layers of battery cell groups of the top layer battery cell group, or between the top layer battery cell group and the non-top layer battery cell group, and between two adjacent layers of battery cell groups of the non-top layer battery cell group.

[0017] In some embodiments, the circumferential surfaces of the plurality of battery cells 10 in the top layer battery cell group are covered in the first accommodation grooves 21 of the top layer bracket 30 and the first accommodation grooves 21 of the intermediate bracket 20 adjacent to the top layer bracket 30, and / or The non-top layer battery cell group includes an intermediate layer battery cell group and a bottom layer battery cell group. The intermediate layer battery cell group is located between the top layer battery cell group and the bottom layer battery cell group. The circumferential surfaces of the plurality of battery cells 10 in the intermediate layer battery cell group are covered in the first accommodation grooves 21 of the adjacent intermediate brackets 20.

[0018] It can be understood that the circumferential surface of the battery cell 10 in the top layer battery cell group may be partially installed in the first accommodation groove 21 of the top layer bracket 30 and the first accommodation groove 21 of the intermediate bracket 20 adjacent to the top layer bracket 30, or may be completely covered in the first accommodation groove 21 of the top layer bracket 30 and the first accommodation groove 21 of the intermediate bracket 20 adjacent to the top layer bracket 30. The circumferential surface of the battery cell 10 in the intermediate layer battery cell group may be partially installed in the first accommodation tank 21 or may be completely covered in the first accommodation tank 21.

[0019] By completely covering the circumferential surface of the battery cell 10, the stability of the battery cell 10 in the first accommodation tank 21 can be enhanced.

[0020] In some embodiments, a first adhesive layer 40 is installed between the first accommodation groove 21 and the circumferential surface of the battery cell 10 located in the first accommodation groove 21.

[0021] It can be understood that the first adhesive layer 40 may be installed on a part of the circumferential surface of the battery cell 10 or may be installed on the entire circumferential surface of the battery cell 10. By installing the first adhesive layer 40 on the entire circumferential surface of the battery cell 10, the connection stability between the battery cell 10 and the first accommodation tank 21 can be enhanced. The thickness of the first adhesive layer 40 may be installed as required.

[0022] In some embodiments, the intermediate bracket 20 and the top layer bracket 30 include two first end plates 50 respectively installed at the positive and negative terminals of the battery cell 10. A first positioning groove 51 is correspondingly installed on each first end plate 50. Each first positioning groove 51 communicates with one first accommodation groove 21. The positive electrode 111 and the negative electrode 112 of the battery cell 10 are respectively installed in the first positioning grooves 51 of the two first end plates 50.

[0023] It can be understood that the first positioning groove 51 may accommodate a part of the positive / negative electrode of the battery cell 10 or the entire positive / negative electrode of the battery cell 10. The positive electrode 111 and the negative electrode 112 of the battery cell 10 are respectively installed in the first positioning groove 51. The first positioning grooves 51 of two brackets (including the top bracket and the intermediate bracket) adjacent to each other up and down may be combined to accommodate the positive / negative electrode of the battery cell 10, or the first positioning groove 51 of one bracket (including the top bracket and the intermediate bracket) may individually accommodate the positive / negative electrode of the battery cell 10. By combining the first positioning grooves 51 of two brackets (including the top bracket and the intermediate bracket) adjacent to each other up and down to accommodate the positive / negative electrode of the battery cell 10, the assembly positioning of the two upper and lower brackets can be made faster and more accurate.

[0024] In some embodiments, the first positioning groove 51 penetrates the first end plate 50 along the thickness direction of the first end plate 50. The positive electrode 111 and the negative electrode 112 of the battery cells of different layers are connected by a bus bar 60, and the bus bar 60 is installed on the side of the first end plate 50 away from the battery cell 10.

[0025] It can be understood that the thickness of the first positioning groove 51 may be the same as the thickness of the positive electrode 111 and the negative electrode of the battery cell 10, may be greater than the thickness of the positive electrode 111 and the negative electrode of the battery cell 10, or may be smaller than the thickness of the positive electrode 111 and the negative electrode of the battery cell 10. The shape of the first positioning groove 51 is the same as that of the positive electrode 111 and the negative electrode of the battery cell 10.

[0026] In some embodiments, the top layer bracket 30 and the intermediate bracket 20 are connected by a buckle 70, and / or Multiple intermediate brackets 20 are provided, and two adjacent intermediate brackets 20 are connected by a buckle 70.

[0027] To make it easier to understand, the top layer bracket 30 and the intermediate bracket 20 are connected by a buckle 70. A hook may be installed on the top layer bracket 30, or a tank may be installed on the intermediate bracket 20, or a tank may be installed on the top layer bracket 30, or a hook may be installed on the intermediate bracket 20, and the connection between the two is achieved by the hook being able to lock into the tank. The buckle 70 may be installed around the outside of the bracket to facilitate installation.

[0028] In some embodiments, the intermediate bracket 20 is integrally molded and / or The top layer bracket 30 is integrally molded.

[0029] In a second aspect, the present disclosure provides a method for manufacturing a battery module. The method for manufacturing the battery module includes providing a bracket, the bracket comprising an intermediate bracket 20 and a top layer bracket 30, wherein a plurality of first housing grooves 21 are provided on opposing sides of the intermediate bracket 20 and on one side of the top layer bracket 30, and the plurality of first housing grooves 21 are arranged along a first direction A; providing a battery cell 10, fixing the battery cell 10 within the bracket, and placing the battery cell 10 in the first housing grooves 21, such that the plurality of first housing grooves 21 and the plurality of battery cells 10 correspond one-to-one; providing an adhesive, and placing the adhesive between the first housing grooves 21 and the battery cell 10; stacking and installing the top layer bracket 30 and the intermediate bracket 20, and the first housing grooves 21 of the top layer bracket 30 are positioned toward the intermediate bracket 20 adjacent to the first housing grooves 21; and providing a bus bar 60, connecting the positive and negative electrodes of the battery cell 10 by the bus bar 60, thereby obtaining a battery module.

[0030] It is understood that fixing the battery cell 10 in the bracket and applying adhesive between the first housing groove 21 and the battery cell 10, and stacking and installing the top layer bracket 30 and the intermediate bracket 20 can be done synchronously or in stages. In the stacking process of the top layer bracket 30 and the intermediate bracket 20, adhesive may be applied between the first housing groove 21 and the battery cell 10 and the battery cell 10 may be fixed in the bracket, or one side of the battery cell 10 may be fixed in the bracket first, adhesive may be applied between one side of the battery cell 10 and the first housing groove 21, and finally the brackets to which the battery cell 10 is fixed may be stacked sequentially and adhesive may be applied between the other side of the battery cell 10 and the first housing groove 21. The adhesive can be installed between the first housing 21 and the battery cell 10 by applying the adhesive to the surface of the battery cell 10, by applying the adhesive to the inside of the first housing 21 and then installing the battery cell 10 into the first housing 21, or by injecting adhesive between the first housing 21 and the battery cell 10 after it has been installed in the first housing 21. The method of installation can also be determined according to the form, type, and characteristics of the adhesive. For example, the adhesive used may be in paste form, in which case the adhesive can completely cover the surface of the battery cell 10 depending on the application method, and the battery cell 10 can be fixed more securely in the first housing 21. There is one top layer bracket 30 and multiple intermediate brackets 20, which can be installed as needed. When there are multiple intermediate brackets 20, the top layer bracket 30 and the multiple intermediate brackets 20 are installed in a sequential stacking manner. The busbar 60 may be installed by welding.

[0031] In a third aspect, with reference to Figures 1 to 6, the present disclosure provides a battery pack. The battery pack includes a housing and a battery module, the housing including a lid 80 and a casing 90, the lid 80 being placed over the casing 90, and the battery module being installed inside the housing.

[0032] In some embodiments, the bottom layer battery cell group of the battery cell group is installed close to the inner bottom of the housing 90, and a plurality of second housing grooves 91 are installed on the inner bottom of the housing 90 along the first direction A, and the plurality of second housing grooves 91 correspond one-to-one with the plurality of battery cells of the bottom layer battery cell group, and the circumferential surface of a part of each battery cell of the bottom layer battery cell group is fixed in the corresponding second housing groove 91.

[0033] To make it easier to understand, the shape of the second housing groove 91 may be a standard geometric shape such as a semicircle, arc, square, or rectangle, and the shape of the second housing groove 91 may conform to the circumferential shape of the bottom layer battery cell 10, making the fixing of the second housing groove 91 to the bottom layer battery cell 10 more stable. The dimensions of the second housing groove 91 may be set as needed, as long as it can accommodate the circumferential surface of the bottom layer battery cell 10 that is exposed within the second housing groove 91. The second housing compartment 91 corresponds one-to-one with the number of bottom layer battery cells 10, and the second housing compartment 91 and the bottom layer battery cells 10 may correspond one-to-one or one-to-many, with the one-to-one correspondence providing better stability.

[0034] In some embodiments, a second adhesive layer 100 is installed between the second housing groove 91 and the circumferential surface of the battery cells 10 of the bottom layer battery cell group located within the second housing groove 91, and / or Two second end plates 92 are installed on the inner bottom of the housing 90, and the two second end plates 92 are installed on the positive and negative terminals of the battery cell 10, respectively. A second positioning groove 921 is installed corresponding to each second end plate 92, and each second positioning groove 921 is connected to a second housing groove 91, and the positive terminal 111 and negative terminal 112 of the battery cell 10 of the bottom layer battery cell group are installed in the second positioning groove 921 of the two second end plates 92, respectively.

[0035] It is understood that the second adhesive layer 100 may be installed on a portion of the circumferential surface of the bottom layer battery cell 10 that is exposed inside the housing 90, or it may be installed on the entire circumferential surface of the bottom layer battery cell 10 that is exposed inside the housing 90. Installing the second adhesive layer 100 on the entire circumferential surface of the bottom layer battery cell 10 that is exposed inside the housing 90 can improve the connection stability between the bottom layer battery cell 10 and the second housing tank 91. The thickness of the second adhesive layer 100 can be set as needed.

[0036] In some embodiments, a third adhesive layer 110 is installed between both sides of the battery module along the first direction A and the housing 90.

[0037] It can be understood that the third adhesive layer 110 may be installed on some of the sides of the battery module along the first direction A, or on all of the sides of the battery module along the first direction A. The second adhesive layer 100 can be installed on all of the sides of the battery module along the first direction A to improve the connection stability between the battery module and the housing 90. The shape of the third adhesive layer 110 matches the gap between the sides of the battery module along the first direction A and the housing 90. The thickness of the third adhesive layer 110 can be set as needed.

[0038] In some embodiments, the top layer bracket 30 and intermediate bracket 20 of the battery module further include two side plates 120, each installed on either side along the first direction A of the battery cell group, a third adhesive layer 110 is installed between the side plates 120 and the housing 90, and a groove 121 is provided on the side of the side plate 120 closer to the housing 90.

[0039] It can be understood that the size and shape of the side plate 120 can be installed as needed. The side plates 120 of the top layer bracket 30 and the intermediate bracket 20 can come into contact with each other, thereby allowing them to be assembled as a single unit, and further increasing the covering area of ​​the third adhesive layer 110. The number, size, shape, and depth of the grooves 121 of the side plate 120 can be installed as needed.

[0040] In a fourth aspect, the present disclosure provides a method for manufacturing a battery pack. The method for manufacturing the battery pack includes providing the battery module and providing a housing, the housing comprising a lid 80 and a casing 90, wherein a plurality of second housing grooves 91 are provided on the inner bottom of the casing 90 along a first direction A, the battery module is placed inside the casing 90, the battery cells 10 on the side of the battery module away from the top layer bracket 30 are placed inside the second housing grooves 91, and adhesive is provided between the second housing grooves 91 and the battery cells 10 inside the second housing grooves 91, and the lid 80 is placed over the casing 90 to obtain the battery pack.

[0041] To make it easier to understand, adhesive can be placed between the second housing 91 and the battery cell 10 in the second housing groove 91 by applying adhesive to the surface of the battery cell 10, by applying adhesive to the inside of the second housing 91 and then placing the battery cell 10 inside the second housing 91, thereby placing adhesive between the second housing 91 and the battery cell 10, or by injecting adhesive between the second housing 91 and the battery cell 10 after placing the battery cell 10 inside the second housing 91, and the method of placement can be adjusted according to the form, type, and characteristics of the adhesive. For example, the adhesive used may be in paste form, in which case it can be placed by application, the adhesive can completely cover the surface of the battery cell 10, and the battery cell 10 can be fixed more effectively inside the second housing 91.

[0042] In some embodiments, placing the lid 80 over the housing 90 includes applying adhesive between both sides of the battery module along the first direction A and the housing 90, and then placing the lid 80 over the housing 90.

[0043] To make it easier to understand, the adhesive may be applied between both sides of the battery module along the first direction A and the housing 90 after the battery module has been placed in the housing 90. This prevents the adhesive from being squeezed out when the battery module is placed in the housing. A paste-type adhesive can be used as the adhesive, which is advantageous because it prevents it from flowing to other parts and is also useful for filling the gap between both sides of the battery module along the first direction A and the housing 90.

[0044] In a fifth aspect, embodiments of the present disclosure provide an electrical device, which includes the battery module or the battery pack. [Explanation of Symbols]

[0045] Battery cells: 10 Positive electrode: 111 Negative electrode: 112 Intermediate bracket: 20 First storage groove: 21 Top layer bracket: 30 First adhesive layer: 40 1st end plate: 50 First positioning groove: 51 Bus bar: 60 Buckle: 70 Lid:80 Casing: 90 Second storage groove: 91 2nd end plate: 92 Second positioning groove: 921 Second adhesive layer: 100 Third adhesive layer: 110 Side panel: 120 Groove: 121

Claims

1. A battery pack, A housing including a lid and a housing, the lid covering the housing, The housing includes a battery module installed within the housing, The battery module includes a group of battery cells and a bracket, The battery cell group includes a top layer battery cell group and a non-top layer battery cell group, and each layer of the battery cell group includes a plurality of battery cells arranged along a first direction. The bracket includes an intermediate bracket and a top layer bracket, the intermediate bracket is installed between the top layer battery cell group and the non-top layer battery cell group, and / or between two adjacent layers of battery cell groups of the non-top layer battery cell group, the top layer bracket is installed on the side of the top layer battery cell group away from the non-top layer battery cell group, a plurality of first housing grooves are provided on the sides of the intermediate bracket and the top layer bracket closest to the battery cell group along the stacking direction of the battery cell group, the plurality of first housing grooves are arranged along the first direction, each of the plurality of first housing grooves corresponds one-to-one with a plurality of battery cells of the adjacent battery cell group, and the battery cells are fixed in the corresponding first housing groove. The bottom layer battery cell group of the battery cell group is installed close to the inner bottom of the housing, a plurality of second housing grooves are provided on the inner bottom of the housing along a first direction, the plurality of second housing grooves correspond one-to-one with the plurality of battery cells of the bottom layer battery cell group, and a portion of the circumferential surface of each battery cell of the bottom layer battery cell group is fixed within the corresponding second housing groove. Two second end plates are installed on the inner bottom of the end face of the housing, and the two second end plates are installed on the positive and negative terminals of the battery cell, respectively. A second positioning groove is installed corresponding to each second end plate, and each second positioning groove is connected to one of the second housing grooves. The positive and negative terminals of the battery cells of the bottom layer battery cell group are installed in the second positioning grooves of the two second end plates, respectively. A battery pack characterized by the following features.

2. The circumferential surfaces of the plurality of battery cells in the top layer battery cell group are covered within the first housing groove of the top layer bracket and the first housing groove of the intermediate bracket adjacent to the top layer bracket, and / or The non-top layer battery cell group includes an intermediate layer battery cell group and a bottom layer battery cell group, the intermediate layer battery cell group is located between the top layer battery cell group and the bottom layer battery cell group, and the circumferential surfaces of multiple battery cells of the intermediate layer battery cell group are covered within the first housing groove of the adjacent intermediate bracket. The battery pack according to feature 1.

3. A first adhesive layer is provided between the first housing groove and the circumferential surface of the battery cell located within the first housing groove. The battery pack according to feature 1.

4. The intermediate bracket and the top layer bracket each include two first end plates positioned at the positive and negative terminals of the battery cell, respectively, with a corresponding first positioning groove provided in each of the first end plates, each of which communicates with a first housing groove, and the positive and negative terminals of the battery cell are positioned within the first positioning grooves of the two first end plates, respectively. The battery pack according to feature 1.

5. The first positioning groove penetrates the first end plate along the thickness direction of the first end plate, and the positive and negative electrodes of the battery cells of different layers of the battery cell group are connected by a busbar, and the busbar is installed on the side of the first end plate away from the battery cells. The battery pack according to feature 4.

6. The top layer bracket and the intermediate bracket are connected by a buckle, and / or Multiple intermediate brackets are provided, and two adjacent intermediate brackets are connected by a buckle. The battery pack according to feature 4.

7. The intermediate bracket is integrally molded and / or The top layer bracket is integrally molded. The battery pack according to feature 6.

8. A second adhesive layer is installed between the second housing groove and the circumferential surface of the battery cells of the bottom layer battery cell group located within the second housing groove. The battery pack according to feature 1.

9. A third adhesive layer is installed between both sides of the battery module along the first direction and the housing. The battery pack according to feature 1.

10. The top layer bracket and the intermediate bracket of the battery module each further include two side plates installed on both sides along the first direction of the battery cell group, the third adhesive layer is installed between the side plates and the housing, and a groove is provided on the side of the side plate closest to the housing. The battery pack according to feature 9.

11. A method for manufacturing a battery pack, A bracket is provided, the bracket comprising an intermediate bracket and a top layer bracket, wherein a plurality of first receiving grooves are provided on both opposing sides of the intermediate bracket and on one side of the top layer bracket, and the plurality of first receiving grooves are arranged along a first direction. A battery cell is provided, the battery cell is fixed within the bracket, the battery cell is placed in the first housing groove, and there is a one-to-one correspondence between the multiple first housing grooves and the multiple battery cells. To provide an adhesive and to install the adhesive between the first housing groove and the battery cell, The top layer bracket and the intermediate bracket are installed stacked on top of each other, and the first housing groove of the top layer bracket is installed facing the intermediate bracket adjacent to the first housing groove. A busbar is provided, the positive and negative terminals of the battery cell are connected by the busbar, and a battery module is obtained. A housing is provided, the housing including a lid and a casing, wherein a plurality of second housing grooves are provided on the inner bottom of the casing along a first direction, two second end plates are provided on the inner bottom of the end faces of the casing, the two second end plates are provided on the positive and negative terminals of the battery cells, respectively, a second positioning groove is provided corresponding to each second end plate, each second positioning groove is connected to one of the second housing grooves, the battery module is installed in the casing, the battery cells on the side of the battery module away from the top layer bracket are installed in the second housing grooves, the positive and negative terminals of the battery cells on the side of the battery module away from the top layer bracket are provided on the second positioning grooves of the two second end plates, and an adhesive is provided between the second housing groove and the battery cells in the second housing groove. This includes placing the lid over the housing and obtaining the battery pack. A method for manufacturing a battery pack characterized by the following.

12. Placing the aforementioned lid over the housing means This includes applying adhesive between both sides of the battery module along the first direction and the housing, and then covering the housing with the lid. The method for manufacturing a battery pack according to feature 11.

13. It is an electrical device, Includes a battery pack according to any one of claims 1 to 10, An electrical device characterized by the following features.

14. It is an electrical device, A battery pack manufactured by the manufacturing method described in claim 11 or 12, An electrical device characterized by the following features.

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