Battery module, battery pack, electrical device and method of 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 priority to Chinese patent applications filed with the China Patent Office on May 6, 2024, bearing application numbers 202410552006.3 and 202420960374.7, respectively, the entire contents of which are incorporated herein by reference. The present disclosure relates to the field of battery technology, and in particular to battery modules, battery packs, electrical devices and methods for fabricating the same. [Background technology]

[0002] In order to provide a battery module with a higher capacity, the battery module is usually configured with multiple battery cells connected in multiple parallel and multiple series. Summary of the Invention [Problem to be solved by the invention]

[0003] However, in the related module design, stacking battery cells into a battery cell group is complicated, the number of components is relatively large, the manufacturing process is difficult, and the reliability of the product is significantly reduced. [Means for solving the problem]

[0004] The present disclosure provides a battery module including a battery cell group and a bracket, the battery cell group including a top layer battery cell group and non-top layer battery cell groups, each layer of the battery cell group 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 disposed between the top layer battery cell group and the non-top layer battery cell group and / or between the battery cell groups of two adjacent layers of the non-top layer battery cell group, the top layer bracket being disposed on a side of the top layer battery cell group away from the non-top layer battery cell group, and a plurality of first accommodating grooves being disposed on sides of the intermediate bracket and the top layer bracket that are closer to the battery cell group along the stacking direction of the battery cell groups, the plurality of first accommodating grooves being disposed in an aligned manner along the first direction, each of the plurality of first accommodating grooves corresponding one-to-one to a plurality of battery cells of an adjacent battery cell group, and the battery cells being fixed in the corresponding first accommodating groove.

[0005] The present disclosure provides a method for manufacturing a battery module, the method including: providing a bracket, the bracket including an intermediate bracket and a top-layer bracket, with a plurality of first accommodating grooves on opposing sides of the intermediate bracket and one side of the top-layer bracket, the plurality of first accommodating grooves being arranged in a first direction; providing battery cells, fixing the battery cells in the bracket and installing the battery cells in the first accommodating grooves so that the first accommodating grooves correspond one-to-one to the plurality of battery cells; providing adhesive, installing the adhesive between the first accommodating grooves and the battery cells; stacking the top-layer bracket and the intermediate bracket, with the first accommodating groove of the top-layer bracket facing the intermediate bracket adjacent to the first accommodating groove; and providing a bus bar, connecting positive and negative electrodes of the battery cells via the bus bar to obtain a battery module.

[0006] The present disclosure provides a battery pack, which includes a housing and the battery module, the housing including a lid and a case, the lid being fitted onto the case, and the battery module being installed in the housing.

[0007] The present disclosure provides a battery pack, and a method for manufacturing the battery pack includes providing the battery module, providing a housing, the housing including a cover and a housing, the housing having a plurality of second accommodating grooves formed on an inner bottom surface thereof along a first direction, installing the battery module in the housing, installing battery cells away from a top bracket of the battery module in the second accommodating grooves, and applying adhesive between the second accommodating grooves and the battery cells in the second accommodating grooves, and covering the housing with the cover to obtain the battery pack.

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

[0009] The battery module provided by the present disclosure has an intermediate bracket installed between the battery cell groups of two adjacent layers, a top layer bracket installed on the side of the top layer battery cell group away from the non-top layer battery cell groups, and the peripheral surfaces of the battery cells fixed in the first accommodating grooves on both sides of the intermediate bracket and the first accommodating groove on the top layer bracket closer to the battery cell groups, thereby realizing fast and stable fixation of the battery cells, which simplifies the battery cell fixing structure, reduces the number of parts, simplifies the process, and reduces costs.

[0010] The battery module manufacturing method provided by the present disclosure includes placing the battery cells in the first accommodating grooves and placing adhesive between the battery cells and the first accommodating grooves, thereby quickly and stably fixing the battery cells to the brackets, which simplifies the process, simplifies the structure, reduces the number of parts, and reduces costs.

[0011] The method for manufacturing a battery pack provided by the present disclosure includes placing adhesive between the second accommodating groove and the battery cell in the second accommodating groove, which allows the battery module to be quickly and stably fixed in the housing, and the process is simple. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a structural diagram of a battery module provided by an embodiment of the present disclosure; FIG. [Figure 2] 1 is a structural diagram of an intermediate bracket provided by an embodiment of the present disclosure; [Figure 3] 1 is a structural diagram of a top layer bracket provided by an embodiment of the present disclosure. [Figure 4] FIG. 1 is a structural diagram of a non-top layer battery cell group provided by an embodiment of the present disclosure. [Figure 5] FIG. 1 is an exploded view of a battery pack provided by an embodiment of the present disclosure. [Figure 6] 1 is a structural diagram of a housing provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0013] In the description of this disclosure, unless otherwise clearly specified and limited, the terms "coupled," "connected," and "fixed" should be interpreted broadly, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal communication between two elements or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present disclosure according to the specific circumstances.

[0014] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," "rear," and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, are used to simplify the description and operation, and do not suggest or imply that the devices or elements shown have a specific orientation, are configured in a specific orientation, or must be operated in a specific orientation. Also, the terms "first" and "second" are used for distinction in the description and do not have any special meaning.

[0015] In a first aspect, referring to FIGS. 1 to 4, an embodiment of the present disclosure provides a battery module. The battery module includes a battery cell group and a bracket, the battery cell group includes a top layer battery cell group and a non-top layer battery cell group, the battery cell group of each layer 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 disposed between the top layer battery cell group and the non-top layer battery cell group and / or between battery cell groups of two adjacent layers of the non-top layer battery cell group, 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 groups, and a plurality of first accommodating grooves 21 are installed on both the intermediate bracket 20 and the top layer bracket 30 on the side closest to the battery cell group along the stacking direction B of the battery cell groups, and the plurality of first accommodating grooves 21 are installed so as to be arranged along the first direction A, and each of the plurality of first accommodating grooves 21 corresponds one-to-one to a plurality of battery cells 10 of the adjacent battery cell group, and the battery cell 10 is fixed in the corresponding first accommodating groove 21.

[0016] It can be understood that the battery cell group includes a plurality of battery cells 10 arranged along a first direction A, and the axial direction of the plurality of battery cells 10 is perpendicular to the first direction A. The electrodes of the same polarity of the plurality of battery cells 10 in the same layer of battery cell groups may be located on the same side or on different sides of the battery cell group. For example, the electrodes of the same polarity of two adjacent battery cells 10 in the same layer of battery cell groups are located on different sides of the battery cell group. The shape of the first accommodating groove 21 may be a standard geometric shape such as a semicircle, arc, square, or rectangle. For example, the shape of the first accommodating groove 21 may be adapted to the circumferential shape of the battery cells 10, thereby more stably fixing the first accommodating groove 21 to the battery cells 10. The dimensions of the first accommodating groove 21 may be set as needed, as long as the circumferential surface of the battery cells 10 exposed in the first accommodating groove 21 is accommodated. The number of first accommodating grooves 21 corresponds to the number of battery cells 10. For example, the first housing 21 and the battery cells 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 housing 21 and the battery cells 10 have a one-to-one correspondence, and it can be understood that this one-to-one correspondence can improve the stability of the battery cells 10 when fixed. The number of layers of battery cell groups may be determined as needed. The shape of the battery cells 10 may be cylindrical, square, or other shapes. The non-top layer battery cell group may include one layer of battery cells or multiple layers of battery cells. The non-top layer battery cell group includes one layer of battery cells, and the intermediate bracket 20 is disposed 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 cell groups, and the intermediate bracket 20 may be installed between the top layer battery cell group and the non-top layer battery cell group, or between the battery cell groups of two adjacent layers 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 the battery cell groups of two adjacent layers of the non-top layer battery cell group.

[0017] In some embodiments, the peripheral surfaces of the plurality of battery cells 10 of the top layer battery cell group are covered by the first receiving grooves 21 of the top layer bracket 30 and the first receiving grooves 21 of the intermediate bracket 20 adjacent to the top layer bracket 30; and / or The non-top layer battery cell group includes a middle layer battery cell group and a bottom layer battery cell group, and the middle layer battery cell group is located between the top layer battery cell group and the bottom layer battery cell group, and the peripheral surfaces of the multiple battery cells 10 of the middle layer battery cell group are covered within the first accommodating groove 21 of the adjacent middle bracket 20.

[0018] It can be understood that the peripheral surfaces of the battery cells 10 in the top layer battery cell group may be partially installed in the first accommodating grooves 21 of the top layer bracket 30 and the first accommodating grooves 21 of the intermediate bracket 20 adjacent to the top layer bracket 30, or may be completely covered by the first accommodating grooves 21 of the top layer bracket 30 and the first accommodating grooves 21 of the intermediate bracket 20 adjacent to the top layer bracket 30. The peripheral surfaces of the battery cells 10 in the intermediate layer battery cell group may be partially installed in the first accommodating tanks 21, or may be completely covered by the first accommodating tanks 21.

[0019] By completely covering the periphery of the battery cell 10, the stability of the battery cell 10 within the first housing tank 21 can be improved.

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

[0021] It can be understood that the first adhesive layer 40 may be provided on a portion of the circumferential surface of the battery cell 10, or may be provided on the entire circumferential surface of the battery cell 10. By providing 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 storage tank 21 can be improved. The thickness of the first adhesive layer 40 may be set as needed.

[0022] In some embodiments, the middle bracket 20 and the top bracket 30 include two first end plates 50 respectively installed at the positive and negative ends of the battery cells 10, each first end plate 50 having a corresponding first positioning groove 51, each first positioning groove 51 communicating with one first receiving groove 21, and the positive electrode 111 and negative electrode 112 of the battery cell 10 respectively installed in the first positioning grooves 51 of the two first end plates 50.

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

[0024] In some embodiments, the first positioning grooves 51 penetrate the first end plate 50 along the thickness direction of the first end plate 50, and the positive electrodes 111 and negative electrodes 112 of the battery cells 10 in different layers are connected by the bus bars 60, and the bus bars 60 are installed on the side of the first end plate 50 away from the battery cells 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 112 of the battery cell 10, may be greater than the thickness of the positive electrode 111 and the negative electrode 112 of the battery cell 10, or may be smaller than the thickness of the positive electrode 111 and the negative electrode 112 of the battery cell 10. The shape of the first positioning groove 51 is the same as the shape of the positive electrode 111 and the negative electrode 112 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 A plurality of intermediate brackets 20 are provided, and two adjacent intermediate brackets 20 are connected by a buckle 70.

[0027] As can be seen, the top layer bracket 30 and the middle bracket 20 are connected by a buckle 70. A hook may be installed on the top layer bracket 30, a trough may be installed on the middle bracket 20, or a trough may be installed on the top layer bracket 30, or a hook may be installed on the middle bracket 20, and the hook can be engaged with the trough to achieve the connection between the two. The buckle 70 may be installed on the outer periphery of the bracket, making installation easier.

[0028] In some embodiments, the intermediate bracket 20 is integrally formed and / or A 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 including: providing a bracket, the bracket including an intermediate bracket 20 and a top-layer bracket 30, with a plurality of first accommodating grooves 21 formed on opposing sides of the intermediate bracket 20 and one side of the top-layer bracket 30, the plurality of first accommodating grooves 21 arranged in a first direction A; providing battery cells 10, fixing the battery cells 10 in the bracket and installing the battery cells 10 in the first accommodating grooves 21 so that the plurality of first accommodating grooves 21 correspond one-to-one to the plurality of battery cells 10; providing adhesive, installing the adhesive between the first accommodating grooves 21 and the battery cells 10; stacking the top-layer bracket 30 and the intermediate bracket 20 so that the first accommodating grooves 21 of the top-layer bracket 30 face the adjacent intermediate bracket 20; providing a busbar 60, connecting the positive and negative electrodes of the battery cells 10 via the busbar 60 to obtain a battery module.

[0030] It will be understood that fixing the battery cells 10 in the brackets and applying adhesive between the first accommodating grooves 21 and the battery cells 10, and stacking and installing the top layer brackets 30 and the intermediate brackets 20 can be performed simultaneously or in stages. In the process of stacking the top layer brackets 30 and the intermediate brackets 20, adhesive may be applied between the first accommodating grooves 21 and the battery cells 10, and the battery cells 10 may be fixed in the brackets. Alternatively, one side of the battery cells 10 may be first fixed in the brackets, and adhesive may be applied between one side of the battery cells 10 and the first accommodating grooves 21, and finally the brackets with the fixed battery cells 10 are stacked one after the other, and adhesive may be applied between the other side of the battery cells 10 and the first accommodating grooves 21. The adhesive can be applied between the first housing 21 and the battery cells 10 by applying the adhesive to the surface of the battery cells 10. Alternatively, the adhesive can be applied to the first housing 21 and then the battery cells 10 are placed in the first housing 21 to apply the adhesive between them. Alternatively, the adhesive can be applied between the first housing 21 and the battery cells 10 by injecting adhesive between the first housing 21 and the battery cells 10 after the battery cells 10 are placed in the first housing 21. The adhesive can be applied depending on the form, type, and properties of the adhesive. For example, the adhesive used can be in paste form, which can completely cover the surface of the battery cells 10 when applied, thereby better fixing the battery cells 10 in the first housing 21. There can be one top layer bracket 30 and multiple intermediate brackets 20, and these 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 stacked manner. The bus bar 60 may be attached by welding.

[0031] 1 to 6, the present disclosure provides a battery pack including a housing and a battery module, the housing including a lid 80 and a case 90, the lid 80 covering the case 90, and the battery module installed in 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 accommodating grooves 91 are installed along the first direction A on the inner bottom of the housing 90, and the plurality of second accommodating grooves 91 correspond one-to-one to the plurality of battery cells of the bottom layer battery cell group, and a portion of the peripheral surface of each battery cell of the bottom layer battery cell group is fixed in the corresponding second accommodating groove 91.

[0033] As can be seen, the shape of the second accommodating grooves 91 can be any standard geometric shape, such as a semicircle, an arc, a square, or a rectangle, and the shape of the second accommodating grooves 91 can be adapted to the peripheral shape of the bottom battery cells 10, thereby enabling the second accommodating grooves 91 to be more stably fixed to the bottom battery cells 10. The dimensions of the second accommodating grooves 91 can be set as needed, as long as they can accommodate the peripheral surfaces of the bottom battery cells 10 exposed in the second accommodating grooves 91. The second accommodating grooves 91 correspond one-to-one to the number of bottom battery cells 10, and the second accommodating grooves 91 and the bottom battery cells 10 can correspond one-to-one or one-to-multiple, with the one-to-one correspondence providing better stability.

[0034] In some embodiments, a second adhesive layer 100 is disposed between the second receiving groove 91 and the peripheral surface of the battery cell 10 of the bottom layer battery cell group located in the second receiving 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 respectively installed at the positive and negative ends of the battery cells 10. A second positioning groove 921 is installed correspondingly on each second end plate 92, and each second positioning groove 921 is connected to one second accommodating groove 91. The positive electrodes 111 and negative electrodes 112 of the battery cells 10 in the bottom layer battery cell group are respectively installed in the second positioning grooves 921 of the two second end plates 92.

[0035] It is understood that the second adhesive layer 100 may be installed on a portion of the circumferential surface of the bottom battery cell 10 exposed inside the housing 90, or on the entire circumferential surface of the bottom battery cell 10 exposed inside the housing 90. Installing the second adhesive layer 100 on the entire circumferential surface of the bottom battery cell 10 exposed inside the housing 90 can improve the connection stability between the bottom 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 disposed between the battery module on both sides in the first direction A and the housing 90 .

[0037] It is 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 is installed on all of the sides of the battery module along the first direction A, which can 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 the middle bracket 20 of the battery module further include two side plates 120 respectively installed on both sides along the first direction A of the battery cell group, a third adhesive layer 110 is installed between the side plate 120 and the housing 90, and a recess 121 is installed on the side of the side plate 120 closer to the housing 90.

[0039] It is understood that the size and shape of the side plates 120 can be set as needed. The side plates 120 of the top layer bracket 30 and the middle bracket 20 can abut against each other, thereby allowing them to be combined together and further increasing the coverage area of ​​the third adhesive layer 110. The number, size, shape, and depth of the grooves 121 of the side plates 120 can be set as needed.

[0040] In a fourth aspect, the present disclosure provides a method for manufacturing a battery pack, the method including: providing the battery module; providing a housing, the housing including a lid 80 and a housing 90, the housing 90 having a plurality of second accommodating grooves 91 formed on the inner bottom surface thereof along a first direction A; installing the battery module in the housing 90; installing the battery cells 10 on the side of the battery module away from the top layer bracket 30 in the second accommodating grooves 91 and applying adhesive between the second accommodating grooves 91 and the battery cells 10 in the second accommodating grooves 91; and covering the housing 90 with the lid 80 to obtain a battery pack.

[0041] As can be seen, the adhesive can be installed between the second housing 91 and the battery cells 10 in the second housing groove 91 by applying the adhesive to the surface of the battery cells 10; the adhesive can also be installed between the second housing 91 and the battery cells 10 by applying the adhesive inside the second housing 91 and then installing the battery cells 10 in the second housing 91; or the adhesive can be installed between the second housing 91 and the battery cells 10 by injecting the adhesive between the second housing 91 and the battery cells 10 after installing the battery cells 10 in the second housing 91; the adhesive can be installed according to the form, type, and properties of the adhesive; for example, the adhesive used can be in paste form, which can be installed by application, completely covering the surface of the battery cells 10 and better fixing the battery cells 10 in the second housing 91.

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

[0043] As can be understood, the adhesive may be placed between the housing 90 and both sides of the battery module in the first direction A after the battery module is placed in the housing 90, and the adhesive may be injected between the housing 90 and both sides of the battery module in the first direction A. This prevents the adhesive from being squeezed out when the battery module is placed in the housing. A paste adhesive may be used as the adhesive, which is advantageous for preventing the adhesive from flowing to other parts and for filling the gaps between the housing 90 and both sides of the battery module in the first direction A.

[0044] In a fifth aspect, an embodiment of the present disclosure provides an electric device, the electric device including 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 Tier Bracket: 30 1st adhesive layer: 40 1st end plate: 50 First positioning groove: 51 Busbar: 60 Buckle: 70 Lid:80 Case: 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 module, a battery cell group and a bracket, the battery cell group includes a top layer battery cell group and a non-top layer battery cell group, and the battery cell group of each layer 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 disposed between the top layer battery cell group and the non-top layer battery cell group and / or between battery cell groups of two adjacent layers of the non-top layer battery cell group, the top layer bracket is disposed on a side of the top layer battery cell group away from the non-top layer battery cell group, and a plurality of first accommodating grooves are disposed on sides of the intermediate bracket and the top layer bracket that are closer to the battery cell group along the stacking direction of the battery cell groups, the plurality of first accommodating grooves are disposed to be aligned along the first direction, each of the plurality of first accommodating grooves corresponds one-to-one to a plurality of battery cells of the adjacent battery cell group, and the battery cells are fixed in the corresponding first accommodating groove. A battery module characterized by:

2. The peripheral surfaces of the plurality of battery cells of the top layer battery cell group are covered by the first accommodating grooves of the top layer bracket and the first accommodating grooves 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 peripheral surfaces of the plurality of battery cells of the intermediate layer battery cell group are covered by the first accommodating grooves of the adjacent intermediate bracket; The battery module according to claim 1 .

3. a first adhesive layer is disposed between the first accommodating groove and a peripheral surface of the battery cell located in the first accommodating groove; The battery module according to claim 1 .

4. The intermediate bracket and the top bracket each include two first end plates respectively disposed at the positive and negative ends of the battery cells, each of the first end plates having a corresponding first positioning groove, each of the first positioning grooves communicating with one of the first receiving grooves, and the positive and negative electrodes of the battery cells respectively disposed in the first positioning grooves of the two first end plates; The battery module according to claim 1 .

5. the first positioning groove penetrates the first end plate along a thickness direction of the first end plate, and positive and negative electrodes of the battery cells of the battery cell groups in different layers are connected by a bus bar, and the bus bar is installed on a side of the first end plate away from the battery cells. The battery module according to claim 4 .

6. The top layer bracket and the intermediate bracket are connected by a buckle; and / or A plurality of the intermediate brackets are provided, and two adjacent intermediate brackets are connected by a buckle. The battery module according to claim 4 .

7. the intermediate bracket is integrally formed; and / or The top layer bracket is integrally molded. The battery module according to claim 6 .

8. A method for manufacturing a battery module, comprising: A bracket is provided, the bracket including a middle bracket and a top layer bracket, a plurality of first receiving grooves are provided on opposite sides of the middle bracket and one side of the top layer bracket, and the plurality of first receiving grooves are arranged along a first direction; providing battery cells, fixing the battery cells in the bracket, and placing the battery cells in the first receiving grooves, wherein a plurality of the first receiving grooves correspond one-to-one to a plurality of the battery cells; providing an adhesive and disposing the adhesive between the first receiving groove and the battery cell; The top layer bracket and the intermediate bracket are stacked and installed, and the first receiving groove of the top layer bracket is installed facing the intermediate bracket adjacent to the first receiving groove; providing a bus bar; and connecting the positive and negative electrodes of the battery cells by the bus bar to obtain a battery module. A method for manufacturing a battery module, comprising:

9. A battery pack, Housing and a battery module manufactured by the battery module manufacturing method according to any one of claims 1 to 7 or claim 8; The housing includes a lid and a housing, the lid is placed over the housing, and the battery module is installed in the housing. A battery pack characterized by:

10. a bottom layer battery cell group of the battery cell group is installed close to an inner bottom of the housing, a plurality of second accommodating grooves are installed in the inner bottom of the housing along a first direction, the plurality of second accommodating grooves correspond one-to-one to the plurality of battery cells of the bottom layer battery cell group, and a portion of the peripheral surface of each battery cell of the bottom layer battery cell group is fixed in the corresponding second accommodating groove; 10. The battery pack according to claim 9.

11. a second adhesive layer is provided between the second accommodating groove and the peripheral surface of the battery cell of the bottom layer battery cell group located in the second accommodating groove; and / or Two second end plates are installed on the inner bottom of the end surface of the housing, and the two second end plates are respectively installed on the positive and negative ends of the battery cells. A second positioning groove is installed correspondingly on each second end plate, and each second positioning groove communicates with one of the second receiving grooves. The positive and negative electrodes of the battery cells of the bottom layer battery cell group are respectively installed in the second positioning grooves of the two second end plates.

11. The battery pack according to claim 10.

12. a third adhesive layer is disposed between both sides of the battery module along the first direction and the housing; 10. The battery pack according to claim 9.

13. the top bracket and the middle bracket of the battery module further include two side plates respectively disposed on both sides of the battery cell group in the first direction, the third adhesive layer being disposed between the side plates and the housing, and a recess being disposed on the side of the side plate closer to the housing; 13. The battery pack according to claim 12.

14. A method for manufacturing a battery pack, comprising: Providing a battery module according to any one of claims 1 to 7 or a battery module manufactured by the method for manufacturing a battery module according to claim 8; providing a housing, the housing including a cover and a housing, a plurality of second accommodating grooves arranged along a first direction on an inner bottom of the housing; installing the battery module in the housing, the battery cells of the battery module on the side away from the top layer bracket arranged in the second accommodating grooves, and installing an adhesive between the second accommodating grooves and the battery cells in the second accommodating grooves; and placing the lid on the housing to obtain a battery pack. A method for manufacturing a battery pack.

15. The step of covering the housing with the lid includes: and placing an adhesive between the housing and both sides of the battery module along the first direction, and then placing the cover on the housing.

15. The method for manufacturing a battery pack according to claim 14.

16. 1. An electrical device comprising: A battery module comprising the battery module according to any one of claims 1 to 7 or a battery module manufactured by the method for manufacturing a battery module according to claim 8. An electrical device characterized by:

17. 1. An electrical device comprising: A battery pack comprising the battery pack of claim 9. An electrical device characterized by:

18. 1. An electrical device comprising: A battery module manufactured by the manufacturing method of claim 14. An electrical device characterized by:

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