A battery pack, a method of manufacturing a battery pack, and an electric device

Abstract

The application provides a battery pack, a manufacturing method of the battery pack and an electric device. The battery pack comprises a first shell and a second shell arranged along a first direction, a first support and a second support arranged along the first direction, and a cell assembly. The cell assembly is located between the first support and the second support. The first support is fixed to the first shell through a first adhesive material, and the second support is fixed to the second shell through a second adhesive material, so that the cell assembly is fixed between the first shell and the second shell. In the structure, the cell assembly is arranged between the first support and the second support and then connected between the first shell and the second shell. When the produced battery pack needs to use different types of cell assemblies, the support corresponding to the cell assembly can be replaced. The cell assembly is fixed in the battery shell through the support, which is beneficial to the fixation of the cell assembly and the cell shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a power utilization device. BACKGROUND

[0002] A rechargeable battery refers to a battery that can be activated by charging after the discharge of the battery cell and can continue to be used. The rechargeable battery is widely used in electronic devices such as mobile phones, notebook computers, power tools, two-wheeled vehicles, and the like.

[0003] The battery cell assembly of the battery pack can include a plurality of battery cells to meet the voltage requirements of the electronic device. As the application range of the battery pack continues to expand, the demand for the capacity, output voltage and other parameters of the battery cell assembly in the battery pack is increasingly diversified, which makes the number and size of the battery cells in the battery cell assembly present a variety of combinations, which is not conducive to the production of the battery pack. SUMMARY

[0004] In view of the above problems, the present application provides a battery pack which can simplify the connection mode of the battery cell and the shell, so that the battery shell can cooperate with different battery cell assemblies, which is conducive to production. The present application adopts the following technical solutions:

[0005] In a first aspect, the present application provides a battery pack, which includes a first shell, a second shell, a first support, a second support, a battery cell assembly, a first adhesive substance and a second adhesive substance. The first shell and the second shell are arranged along a first direction, and the first support and the second support are arranged along the first direction. Along the first direction, the battery cell assembly is located between the first support and the second support. The first adhesive substance fixes the first support to the first shell, and the second adhesive substance fixes the second support to the second shell.

[0006] In the above structure, the battery cell assembly is connected between the first shell and the second shell after being arranged between the first support and the second support, which simplifies the connection mode of the battery cell and the battery shell, thereby reducing the material cost and the process cost.

[0007] In some embodiments of the present application, the first adhesive substance includes sealant.

[0008] In some embodiments of the present application, the second adhesive substance includes sealant.

[0009] In some embodiments of the present application, when a different type of battery cell assembly needs to be used during the production of the battery pack, the support corresponding to the battery cell assembly and cooperating with the battery cell assembly is replaced, and the battery cell assembly is fixed in the battery shell through the support. The battery shell in the battery pack can fix different battery cell assemblies.

[0010] In some embodiments of the present application, the first shell forms a first space, the second shell forms a second space, the first space and the second space are communicated to form a containing space, and the cell assembly is placed in the containing space, so that the cell assembly placed in the containing space can be protected by the first shell and the second shell, reducing the possibility of damage to the cell assembly and helping to improve safety.

[0011] In some embodiments of the present application, the first shell includes a first main body and a plurality of first side walls connected to the first main body, the second shell includes a second main body and a plurality of second side walls connected to the second main body, and the first main body and the second main body are spaced apart in the first direction. The first bracket is fixed to the first main body, the second bracket is fixed to the second main body, and the first side wall is connected to the second side wall.

[0012] In some embodiments of the present application, the first side wall can be connected to the second side wall by screws, rivets, buckles, etc. or connected by adhesive substances such as glue and double-sided tape.

[0013] In some embodiments of the present application, the cell assembly includes a plurality of cells, the battery further includes a circuit board, the cells are connected to the circuit board, and at least one of the first shell and the second shell is provided with a first groove. At least part of the circuit board is arranged in the first groove, which not only connects the circuit board to at least one of the first shell and the second shell to fix the circuit board, but also facilitates the connection of the electrode terminals of the cells to the circuit board.

[0014] In some embodiments of the present application, the cell includes a soft package cell.

[0015] In some embodiments of the present application, the cell shell includes an aluminum plastic film.

[0016] In some embodiments of the present application, the circuit board is provided with a through hole, and the electrode terminal is welded to the surface of the circuit board away from the cell shell after passing through the through hole.

[0017] In some embodiments of the present application, the circuit board is provided with an electrical connector connected to the surface of the circuit board away from the cell shell, and the electrode terminal is welded to the electrical connector after passing through the through hole, so that the electrical connection between the electrode terminal and the circuit board is stable.

[0018] In some embodiments of the present application, at least one of the first shell and the second shell is provided with a first structure, the first structure is protruded to the side where the cell assembly is located, and the first groove is arranged on the first structure.

[0019] By arranging the first groove on the first structure, the structural strength of the first shell and the second shell can be ensured.

[0020] In some embodiments of the present application, one of the first support and the first shell is provided with a first recess, and the other is provided with a first protrusion, and the first protrusion is arranged in the first recess. And / or one of the second support and the second shell is provided with a second recess, and the other is provided with a second protrusion, and the second protrusion is arranged in the second recess. The first support and the first shell are connected through the insertion of the first protrusion and the first recess, and the insertion mode enables the first support to be conveniently connected with the first shell.

[0021] In some embodiments of the present application, the plurality of battery cells are arranged in a second direction in a stacked manner, so that the plurality of battery cells in the battery cell assembly are closely arranged, which is conducive to improving the space utilization of the battery cell assembly and helping to improve the energy density of the battery pack. At least one of the first support and the second support is provided with a third recess, and at least part of the battery cell shell is arranged in the third recess, and the third recess can accommodate at least part of the battery cell, thereby achieving positioning of the battery cell. The battery cell shell is arranged in cooperation with the third recess and is bonded by a third bonding material, which can reduce the possibility of relative sliding of the battery cell with respect to the first support and the second support, further improve the positioning effect of the battery cell, and the second direction is perpendicular to the first direction.

[0022] In some embodiments of the present application, the third recess is arranged in extension along a third direction, the battery cell assembly and the circuit board are arranged along the third direction, and the circuit board is electrically connected with the electrode terminal of the battery cell, so that the circuit board can be located at one end of the battery cell assembly, facilitating electrical connection between the electrode terminal of the battery cell in the battery cell assembly and the circuit board, and the third direction is perpendicular to both the first direction and the second direction.

[0023] In some embodiments of the present application, the battery pack further comprises a connecting member for connecting with an external device, and the connecting member is arranged on the first shell or the second shell, so that the battery pack can input or output electric energy through the connecting member or be signal-connected with an external device.

[0024] In some embodiments of the present application, along the first direction, the battery cell shell is arranged between the first support and the second support.

[0025] In a second aspect, the present application provides a manufacturing method of a battery pack, comprising the following steps:

[0026] providing a battery cell assembly, a first support and a second support, arranging the first support and the second support on opposite sides of the battery cell assembly along a first direction to form a battery module;

[0027] providing a first shell, arranging a first bonding material in the first shell, or arranging a first bonding material on the surface of the first support, and placing the battery module into the first shell along the first direction;

[0028] The second shell is provided, a second adhesive material is arranged in the second shell, or a second adhesive material is arranged on the surface of the second support, the second shell and the first shell are connected in the first direction, and the battery module is accommodated in the first shell and the second shell.

[0029] Through the above battery manufacturing method, the battery cell assembly can be fixed in the first shell and the second shell through the first support and the second support, the fixation of different battery cell assemblies can be realized, and the production of the battery is facilitated.

[0030] In the battery manufacturing method provided in the specific embodiment of the present application, the first shell is provided, a first adhesive material is arranged in the first shell, or a first adhesive material is arranged on the surface of the first support, and before the battery module is placed into the first shell in the first direction, the method further comprises: providing a circuit board provided with a through hole, the battery cell assembly comprises a plurality of battery cells, each battery cell comprises a battery cell shell, an electrode terminal and an electrode assembly arranged in the battery cell shell, the electrode terminal is connected to the electrode assembly and extends from the battery cell shell, and the electrode terminal is welded to the surface of the circuit board away from the battery cell shell after passing through the through hole. By welding the electrode terminal of the battery cell to the surface of the circuit board away from the battery cell shell after passing through the through hole, the electrode terminal of the battery cell is firmly electrically connected to the circuit board, which helps to improve the stability of the electrical connection between the circuit board and the electrode terminal.

[0031] In a third aspect, the present application provides a power utilization device, which comprises the battery provided in any of the technical solutions.

[0032] The technical solutions provided by the embodiments of the present application at least have the following beneficial effects:

[0033] The present application provides a battery, which comprises a first shell and a second shell arranged in a first direction, a first support and a second support arranged in the first direction, and a battery cell assembly, the battery cell assembly is located between the first support and the second support, the first support is fixed to the first shell through a first adhesive material, the second support is fixed to the second shell through a second adhesive material, and the battery cell assembly is fixed between the first shell and the second shell. After the battery cell assembly in the above structure is arranged between the first support and the second support and then connected between the first shell and the second shell, when the produced battery needs to use different types of battery cell assemblies, the supports corresponding to and matched with the battery cell assemblies can be replaced, the battery cell assembly is fixed in the battery shell through the support, the fixation of different battery cell assemblies is realized, thereby reducing material cost and process cost, and the production of the battery is facilitated.

[0034] The application further provides a manufacturing method of the battery pack, which comprises the following steps: placing the battery module formed by the cell assembly and the first support and the second support into the first shell along a first direction, and fixing by a first adhesive; connecting the second shell and the first shell along the first direction, so that the battery module is fixed with the second shell by a second adhesive, and the battery module is accommodated in the first shell and the second shell.

[0035] The application further provides a power utilization device, which comprises the battery pack provided by the above technical solution, and is advantageous in cost reduction.

[0036] The above description is only a summary of the technical solution of the application, and in order to make the technical means of the application more clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals are used throughout the several drawings to designate the same or similar parts. In the drawings:

[0038] Figure 1 Split view of the battery pack provided by some embodiments of the application;

[0039] Figure 2 Structure diagram of the cell in the battery pack provided by some embodiments of the application;

[0040] Figure 3 Sectional view of the battery pack provided by some embodiments of the application;

[0041] Figure 4 Structure diagram of the first shell in the battery pack provided by some embodiments of the application; Figure 3 Enlarged view of A in FIG. 8;

[0042] Figure 5 Structure diagram of the second shell in the battery pack provided by some embodiments of the application;

[0043] Figure 6 Structure diagram of the second shell in the battery pack provided by some embodiments of the application;

[0044] Figure 7 Enlarged view of C in FIG. 10; Figure 5 Enlarged view of C in FIG. 10;

[0045] Figure 8 For Figure 3 Enlarged view at B;

[0046] Figure 9 Structure diagram of the first support or the second support in the battery pack provided by some embodiments of the present application;

[0047] Figure 10 Structure diagram of the internal part member of the battery pack provided by some embodiments of the present application;

[0048] Figure 11 Structure diagram of the circuit board provided by some embodiments of the present application;

[0049] Figure 12 Connection diagram of the circuit board and the battery cell provided by some embodiments of the present application;

[0050] Figure 13 For Figure 12 Enlarged view at D;

[0051] Figure 14 Flow chart of the manufacturing method of the battery pack provided by some embodiments of the present application.

[0052] 1, first housing; 11, first space; 12, first main body part; 13, first side wall; 14, first groove; 15, first structure; 16, first recess; 17, first adhesive substance; 2, second housing; 21, second space; 22, second main body part; 23, second side wall; 24, second recess; 25, second adhesive substance; 3, first support; 31, first protrusion; 32, third recess; 33, third protrusion; 34, third adhesive substance; 4, second support; 41, second protrusion; 42, fourth protrusion; 5, battery cell assembly; 51, battery cell; 511, battery cell housing; 512, electrode terminal; 6, circuit board; 61, through hole; 62, electrical connector; 7, buffer; 8, connector; 9, handle. DETAILED DESCRIPTION

[0053] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0054] In addition, the technical terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0055] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] At present, from the development of market situation, the application of battery pack is more and more extensive. The battery pack is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, and many fields such as communication equipment, military equipment and aerospace. With the continuous expansion of the application field of battery pack, the demand of its market is also increasing.

[0057] The technical solutions of the battery pack, the manufacturing method of the battery pack and the electric device provided by the present application are further described below through specific embodiments.

[0058] Please refer to Figure 1 , Figure 1 The split diagram of the battery pack provided by some embodiments of the present application is provided. Some embodiments of the present application provide a battery pack, which comprises a first shell 1 and a second shell 2, the first shell 1 and the second shell 2 are arranged along a first direction; a first support 3 and a second support 4 are arranged along the first direction; a cell assembly 5 is arranged along the first direction, and the cell assembly 5 is located between the first support 3 and the second support 4; a first adhesive material 17 is used to fix the first support 3 to the first shell 1; and a second adhesive material 25 is used to fix the second support 4 to the second shell 2.

[0059] The first shell 1 and the second shell 2 can be components used to form a battery shell in the battery pack, and can be part of the structure in the battery shell. In some embodiments, the first shell 1 and the second shell 2 can be formed by mechanical processing such as stamping through plate-shaped components, or can be formed by removing materials such as milling through a whole blank, or can be formed by an injection molding process. The specific processing and forming mode of the first shell 1 and the second shell 2 can be selected by those skilled in the art according to the actual situation. The first shell 1 and the second shell 2 are arranged in sequence along the first direction. In some embodiments, an identification is arranged on the outer surface of the first shell 1 or the second shell 2, and the identification is used to display the model of the battery pack, so that the user can quickly determine the number, size and other parameters of the cell 51 in the cell assembly 5 in the battery pack.

[0060] In some embodiments, the material of the first shell 1 and the second shell 2 can be a material with certain strength, which can be acrylonitrile-butadiene-styrene copolymer, polypropylene, or other materials with certain strength and insulation performance. A person skilled in the art can select the material of the first shell 1 and the second shell 2 according to the actual situation.

[0061] In some embodiments, the first shell 1 forms a first space 11, and the second shell 2 forms a second space 21. The first space 11 and the second space 21 are communicated to form a containing space, and the battery cell assembly 5 is arranged in the containing space.

[0062] The first space 11 in the first shell 1 can be an open space structure, and the opening direction of the first space 11 is arranged towards the second shell 2. The second space 21 in the second shell 2 can be an open space structure, and the opening direction of the second space 21 is arranged towards the first shell 1. When the first shell 1 and the second shell 2 are connected, the first space 11 and the second space 21 are communicated to form a containing space for arranging the battery cell assembly 5. The battery cell assembly 5 is arranged in the containing space, which reduces the possibility of damage to the battery cell assembly 5 and helps to improve safety.

[0063] In some embodiments, the battery pack further comprises a connecting piece 8 for connecting with an external device. The connecting piece 8 is arranged on the first shell 1 or the second shell 2. The battery pack can perform input and output of electric energy or signal connection with an external device through the connecting piece 8. Optionally, the connecting piece 8 is connected to the second shell 2. The battery pack can perform input and output of electric energy or signal connection with an external device through the connecting piece 8 arranged on the second shell 2.

[0064] The first support 3 and the second support 4 can be arranged along the first direction. By arranging the first support 3 and the second support 4 in the same direction as the first shell 1 and the second shell 2, the first support 3 and the second support 4 are arranged conveniently between the first shell 1 and the second shell 2.

[0065] In some embodiments, the first support 3 and the second support 4 are arranged at intervals along the first direction, and the battery cell assembly 5 is arranged between the first support 3 and the second support 4. The first support 3, the second support 4, and the battery cell assembly 5 can be connected by an adhesive such as glue or double-sided tape, so that the battery cell assembly 5 is fixed firmly with the first support 3 and the second support 4. In some embodiments, the material of the first support 3 and the second support 4 can be a material with certain strength, which can be acrylonitrile-butadiene-styrene copolymer, polypropylene, or other materials with certain strength and insulation performance. A person skilled in the art can select the material of the first support 3 and the second support 4 according to the actual situation.

[0066] In some embodiments, the first support 3 is fixed to the first shell 1 by a first adhesive 17, and the second support 4 is fixed to the second shell 2 by a second adhesive 25, so that when the produced battery pack needs to be replaced with a different type of cell assembly 5, the support corresponding to the cell assembly 5 can be replaced, thereby reducing material and process costs. The first adhesive 17 includes but is not limited to sealant, foam adhesive, pouring adhesive, etc., so that the first support 3 and the first shell 1 are firmly connected. The second adhesive 25 includes but is not limited to sealant, foam adhesive, pouring adhesive, etc., so that the second support 4 and the second shell 2 are firmly connected. The second adhesive 25 can be the same as or different from the first adhesive 17, and the person skilled in the art can select the type of the second adhesive 25 according to the actual situation.

[0067] In some embodiments, the cell assembly 5 includes a plurality of cells 51, as shown in Figure 2 Each cell 51 includes a cell shell 511, an electrode terminal 512, and an electrode assembly arranged in the cell shell 511, and the electrode terminal 512 is connected to the electrode assembly and extends out of the cell shell 511. In some embodiments, in the first direction, the cell shell 511 is arranged between the first support 3 and the second support 4, so that the cell shell 511 can be covered by the first support 3 and the second support 4, thereby strengthening the protection of the cell shell 511.

[0068] In some embodiments, the cell 51 includes a soft package cell.

[0069] In some embodiments, the cell shell 511 includes an aluminum plastic film.

[0070] The plurality of cells 51 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the plurality of cells 51 are connected in series and in parallel. The plurality of cells 51 can be directly connected in series, in parallel, or in a mixed manner, and then the plurality of cells 51 are directly formed into the cell assembly 5, or the plurality of cells 51 are first connected in series, in parallel, or in a mixed manner to form a module, and then the plurality of modules are connected in series, in parallel, or in a mixed manner to form an integral whole to form the cell assembly 5.

[0071] In some embodiments, the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator film between the positive electrode sheet and the negative electrode sheet, and the positive electrode sheet, the negative electrode sheet, and the separator film are wound to form a wound structure or stacked to form a laminated structure. The cell 51 includes but is not limited to a lithium ion cell, a sodium ion cell, etc.

[0072] In some embodiments, as shown in Figure 3 and Figure 4As shown, the battery pack further comprises a circuit board 6, the electrode terminal 512 is connected to the circuit board 6, at least one of the first shell 1 and the second shell 2 is provided with a first groove 14, and at least part of the circuit board 6 is arranged in the first groove 14. Optionally, the circuit board 6 comprises a printed circuit board (PCB), and a plurality of wires (not shown in the figure) are arranged on the circuit board 6. Optionally, the circuit board 6 comprises a flexible printed circuit (FPC).

[0073] The electrode terminal 512 comprises a positive electrode terminal and a negative electrode terminal, and the positive electrode terminal and the negative electrode terminal are arranged at the same end of the battery cell 51 along the second direction. The connection of the positive electrode terminal and the negative electrode terminal of the adjacent battery cell 51 can be achieved by arranging the circuit board 6 at one end of the battery cell 51 along the second direction. In other embodiments, the positive electrode terminal and the negative electrode terminal can be arranged at opposite ends of the battery cell 51 along the second direction.

[0074] In some embodiments, the circuit board 6 is provided with a through hole 61, and the electrode terminal 512 is welded to the surface of the circuit board 6 away from the battery cell shell 511 after passing through the through hole 61.

[0075] In some embodiments, the circuit board 6 is provided with an electrical connector 62, the electrical connector 62 is connected to the surface of the circuit board 6 away from the battery cell shell 511, and the electrode terminal 512 is welded to the electrical connector 62 after passing through the through hole 61, so that the electrical connection between the electrode terminal 512 and the circuit board 6 is stable.

[0076] The first groove 14 can be a structure formed on at least one of the first shell 1 and the second shell 2 for arranging the circuit board 6. The first groove 14 can be formed by removing material from at least one of the first shell 1 and the second shell 2, or can be formed together with the molding process of at least one of the first shell 1 and the second shell 2, and at least part of the circuit board 6 is arranged in the first groove 14, so that the circuit board 6 is connected to at least one of the first shell 1 and the second shell 2, and the fixation of the circuit board 6 is achieved.

[0077] In some embodiments, at least one of the first shell 1 and the second shell 2 is provided with a first structure 15, the first structure 15 protrudes towards the side where the battery cell assembly 5 is located, and the first groove 14 is arranged in the first structure 15.

[0078] The first structure 15 can be a boss structure protruding towards the battery cell assembly 5, and the first groove 14 can be formed by removing material from the first structure 15, such as milling, or can be formed together with the molding process of at least one of the first shell 1 and the second shell 2.

[0079] In some embodiments, as shown in FIG. 6, the first groove 14 is arranged in the first structure 15, and the first structure 15 is a boss structure protruding towards the battery cell assembly 5. Figure 5As shown, the first shell 1 comprises a first main body 12 and a plurality of first side walls 13 connected to the first main body 12, which can be fixedly connected to the edge of the first main body 12, and together with the first main body 12 enclose a first space 11. Optionally, the first shell 1 comprises a first main body 12 and 4 first side walls 13 connected to the first main body 12, which together with the first main body 12 enclose a first space 11. The first main body 12 and the first support 3 are fixedly connected by a first adhesive 17.

[0080] In some embodiments, as shown, Figure 6 As shown, the second shell 2 comprises a second main body 22 and a plurality of second side walls 23 connected to the second main body 22, which can be fixedly connected to the edge of the second main body 22, and together with the second main body 22 enclose a second space 21. The second shell 2 comprises a second main body 22 and 4 second side walls 23 connected to the second main body 22, which together with the second main body 22 enclose a second space 21. The second main body 22 and the second support 4 are fixedly connected by a second adhesive 25.

[0081] In the first direction, the first main body 12 and the second main body 22 are spaced apart, and the cell assembly 5 is located between the first main body 12 and the second main body 22 in the first direction. The first side wall 13 and the second side wall 23 are connected.

[0082] Optionally, the first side wall 13 can be connected to the second side wall 23 by screws, rivets, buckles, etc. connectors, or by adhesives such as glue, double-sided tape, etc. Those skilled in the art can choose the connection method of the first side wall 13 and the second side wall 23 according to the actual situation.

[0083] In some embodiments, the first shell 1 and the second shell 2 are both provided with a first structure 15, the first structure 15, the first side wall 13 and the first main body 12 on the first shell 1 can form a space for accommodating the cell assembly 5, and the first structure 15, the second side wall 23 and the second main body 22 on the second shell 2 can form a space for accommodating the cell assembly 5. When the cell assembly 5 is placed therein, the first structure 15 and the first side wall 13 on the first shell 1 and the second shell 2 can limit the cell assembly 5 in the third direction, thereby reducing the possibility of movement of the cell assembly 5 in the accommodation space. The third direction is perpendicular to the first direction and the second direction.

[0084] In some embodiments, one of the first support 3 and the first shell 1 is provided with a first recess 16, and the other is provided with a first protrusion, the first protrusion being arranged in the first recess; and / or one of the second support 4 and the second shell 2 is provided with a second recess, and the other is provided with a second protrusion, the second protrusion being arranged in the second recess.

[0085] In some embodiments, as shown in Figure 7 The first housing 1 is provided with a first recess 16, and the first support 3 is provided with a first protrusion 31. When the first support 3 is assembled into the first housing 1 in the first direction, the first support 3 is connected to the first housing 1. The first recess 16 and the first protrusion 31 are provided with a fourth adhesive substance. When the first protrusion 31 is arranged in the first recess 16, the fourth adhesive substance can adhere the surface of the first protrusion 31 to the inner wall surface of the first recess 16, thereby improving the connection firmness of the first support 3 and the first housing 1. The fourth adhesive substance includes, but is not limited to, sealant, foaming glue, pouring sealant, and the like. The fourth adhesive substance can be the same as or different from the first adhesive substance 17. The type of the fourth adhesive substance can be selected by a person skilled in the art according to actual conditions.

[0086] In some embodiments, the first support 3 is provided with two groups of first protrusions 31 arranged in intersection. The first housing 1 is provided with two groups of first recesses 16 arranged in intersection corresponding to the first protrusions 31. The connection strength of the first support 3 and the first recess 16 is improved. Alternatively, the two groups of first protrusions 31 on the first support 3 are arranged in a cross shape. The two groups of first recesses 16 on the first housing 1 are arranged in a cross shape corresponding to the first protrusions 31, so that the first recess 16 is arranged conveniently on the first housing 1, and the first protrusion 31 is arranged conveniently on the first support 3.

[0087] In some embodiments, the first support 3 is further provided with a third protrusion 33 protruding from the side of the first support 3 away from the battery cell assembly 5 and located at the connection position of the first protrusion 31 and the first support 3, so as to improve the connection strength of the first protrusion 31 and the first support 3.

[0088] In some embodiments, as shown in Figure 8 The second support 4 is provided with a second protrusion 41, and the second housing 2 is provided with a second recess 24. When the second support 4 is assembled into the second housing 2 in the first direction, the second support 4 is connected to the second housing 2. The second recess 24 and the second protrusion 41 are provided with a fifth adhesive substance. When the second protrusion 41 is arranged in the second recess 24, the fifth adhesive substance can adhere the surface of the second protrusion 41 to the inner wall surface of the second recess 24, thereby improving the connection firmness of the second support 4 and the second housing 2. The fifth adhesive substance includes, but is not limited to, sealant, foaming glue, pouring sealant, and the like. The fifth adhesive substance can be the same as or different from the first adhesive substance 17. The type of the fifth adhesive substance can be selected by a person skilled in the art according to actual conditions.

[0089] In some embodiments, the second protrusions 41 on the second support 4 are provided in two groups, and the two groups of second protrusions 41 are intersected, and the second recesses 24 on the second shell 2 are provided in two groups, and the two groups of second recesses 24 are correspondingly intersected with the second protrusions 41, which is beneficial to improve the connection strength of the second support 4 and the second recess 24. Optionally, the two groups of second protrusions 41 on the second support 4 are arranged in a cross shape, and the two groups of second recesses 24 on the second shell 2 are correspondingly arranged in a cross shape with the second protrusions 41, so that the second recesses 24 are arranged conveniently on the second shell 2, and the second protrusions 41 are arranged conveniently on the second support 4.

[0090] In some embodiments, the second support 4 is further provided with a fourth protrusion 42, the fourth protrusion 42 protrudes from a side of the second support 4 away from the battery cell assembly 5 and is located at a connection position of the second protrusion 41 and the second support 4, which is used to strengthen the connection strength of the second protrusion 41 and the second support 4.

[0091] In some embodiments, the first support or the second support is connected with a wire harness fixing structure, the wire harness fixing structure is provided with a through hole, and the wire harness connected with the circuit board passes through the through hole, so that the wire harness connected with the circuit board is conveniently positioned.

[0092] In some embodiments, the plurality of battery cells 51 are arranged in a stacking manner along a second direction, at least one of the first support 3 and the second support 4 is provided with a third recess 32, and the battery cell shell 511 is arranged in cooperation with the third recess 32 and is bonded by a third bonding material 34. Optionally, a gasket is arranged between two adjacent battery cells 51, and the gasket can be made of foam, which is used to buffer the size change caused by the swelling of the battery cell 51.

[0093] The plurality of battery cells 51 are arranged in a stacking manner along a second direction, so that the plurality of battery cells 51 in the battery cell assembly 5 are closely arranged, which is beneficial to improve the space utilization rate of the battery cell assembly 5 and help to improve the energy density of the battery pack. In some embodiments, the second direction can be arranged as a direction perpendicular to the first direction, so that the direction in which the plurality of battery cells 51 are arranged in a stacking manner is perpendicular to the arrangement direction of the first support 3 and the second support 4, which is beneficial to strengthen the fixation of the plurality of battery cells 51 and the first support 3 and the fixation of the plurality of battery cells 51 and the second support 4.

[0094] The third recess 32 can be a recess structure provided on at least one of the first support 3 and the second support 4, which is arranged on the wall body of the first support 3 and / or the second support 4 close to the battery cell assembly 5, and can accommodate at least part of the battery cell 51 to realize the positioning of the battery cell 51. In some embodiments, at least part of the battery cell shell is arranged in the third recess. Optionally, the third recess 32 is arranged in a shape corresponding to the battery cell shell 511, so that the battery cell 51 can be closely arranged in the third recess 32, and the fixation of the battery cell 51 by the third recess 32 is strengthened.

[0095] The third recess 32 is arranged on the first support 3, and the part of the battery cell shell 511 close to the first support 3 is arranged in the third recess 32, so as to position the battery cell 51. Alternatively, the third recess 32 is arranged on the second support 4, and the part of the battery cell shell 511 close to the second support 4 is arranged in the third recess 32, so as to fix the battery cell 51. Alternatively, the third recess 32 is arranged on both the first support 3 and the second recess 24, and the part of the battery cell shell 511 close to both the first support 3 and the second support 4 is arranged in the third recess 32, so as to better position the battery cell 51.

[0096] In some embodiments, as shown in FIG. 1, the first support 3 and the second support 4 have the same structure, and the description is not repeated here for convenience. Figure 9

[0097] In some embodiments, as shown in FIG. 1, the first support 3 and the second support 4 have the same structure, and the description is not repeated here for convenience. Figure 10

[0098] By arranging the third adhesive substance 34 in the third recess 32 to adhere the battery cell shell 511 to the surface of the third recess 32, the relative movement of the battery cell 51 with respect to the first support 3 and the second support 4 can be reduced, and the positioning effect of the battery cell 51 is further improved.

[0099] In some embodiments, the third recess 32 extends along the third direction, the battery cell assembly 5 and the circuit board 6 are arranged along the third direction, and the circuit board 6 is electrically connected to the electrode terminal 512 of the battery cell 51 in the battery cell assembly 5.

[0100] The extending direction of the third recess 32 is arranged along the third direction, so that the arrangement direction of the two ends of each battery cell 51 is the third direction, the battery cell assembly 5 and the circuit board 6 are arranged along the third direction, so that the circuit board 6 can be located at one end of the battery cell assembly 5, and the electrode terminal 512 of the battery cell 51 in the battery cell assembly 5 is electrically connected to the circuit board 6.

[0101] In some embodiments, the battery pack further comprises a buffer 7, which is arranged between the first side wall 13 and the second side wall 23 and the battery cell assembly 5 along the third direction. The buffer 7 can protect the battery cell assembly 5. In some embodiments, the buffer 7 can be made of foam, so that the buffer 7 has good buffering performance, which is conducive to improving the protection of the battery cell assembly 5 by the buffer 7.

[0102] In some embodiments, the battery pack further comprises a handle 9, and the two ends of the handle 9 are rotatably connected to the first shell 1 and the second shell 2, respectively, so that the user can carry the battery pack by the handle 9, which is conducive to improving the transportation convenience of the battery pack.​​

[0103] Some embodiments of the present application also provide a power utilization device comprising the battery pack provided by the above technical solution. Since the power utilization device comprises the battery pack provided by the above technical solution, the production of the power utilization device is facilitated.

[0104] Some embodiments of the present application also provide a manufacturing method of a battery pack, comprising the following steps:

[0105] S01, providing the battery cell assembly 5, the first support 3 and the second support 4, and arranging the first support 3 and the second support 4 on opposite sides of the battery cell assembly 5 along a first direction to form a battery module.

[0106] In the above step S01, the first support 3 and the second support 4 are respectively connected to the opposite sides of the battery cell assembly 5 along the first direction, so that the battery cell assembly 5, the first support 3 and the second support 4 can form a battery module, and the battery module can be assembled as a whole, which facilitates the subsequent assembly convenience of the battery pack.

[0107] S02, providing the first shell 1, arranging the first adhesive substance 17 in the first shell 1, or arranging the first adhesive substance 17 on the surface of the first support 3, and placing the battery module into the first shell 1 along the first direction.

[0108] In the above step S02, by arranging the first adhesive substance 17 in the first shell 1 and placing the battery module into the first shell 1 along the first direction, the battery module can be assembled into the first shell 1 along the first direction and firmly connected with the inner wall of the first shell 1; or by arranging the first adhesive substance 17 on the surface of the first support 3 and placing the battery module into the first shell 1 along the first direction, the battery module can be assembled into the first shell 1 along the first direction while being firmly connected with the inner wall of the first shell 1.

[0109] S03, providing the second shell 2, arranging the second adhesive substance 25 in the second shell 2, or arranging the second adhesive substance 25 on the surface of the second support 4, connecting the second shell 2 and the first shell 1 along the first direction, and accommodating the battery module in the first shell 1 and the second shell 2.

[0110] In the step S03, the second shell 2 and the first shell 1 are connected in the first direction by arranging the second adhesive 25 in the second shell 2, the battery module is assembled into the second shell 2 in the first direction and firmly connected with the inner wall of the second shell 2, so that the battery module is accommodated in the first shell 1 and the second shell 2, and the assembly of the battery pack is realized; or the second shell 2 and the first shell 1 are connected in the first direction by arranging the second adhesive 25 on the surface of the second support 4, the battery module is assembled into the second shell 2 in the first direction and firmly connected with the inner wall of the second shell 2, so that the battery module is accommodated in the first shell 1 and the second shell 2, and the assembly of the battery pack is realized.

[0111] In some embodiments, the method further comprises a step S011 before the step S02.

[0112] S011, as shown in Figure 11 The circuit board 6 provided with the through hole 61, the battery cell assembly 5 comprises a plurality of battery cells 51, each battery cell 51 comprises a battery cell shell 511, an electrode terminal 512 and an electrode assembly arranged in the battery cell shell 511, the electrode terminal 512 is connected with the electrode assembly and extends out of the battery cell shell 511, as shown in Figure 12 and Figure 13 The electrode terminal 512 is welded to the surface of the circuit board 6 away from the battery cell shell 511 after passing through the through hole 61.

[0113] In the step S011, the electrode terminal 512 of the battery cell 51 is welded to the surface of the circuit board 6 away from the battery cell shell 511 after passing through the through hole 61, so that the electrode terminal 512 of the battery cell 51 is firmly electrically connected with the circuit board 6, which helps to improve the stability of the electrical connection between the circuit board 6 and the electrode terminal 512.

[0114] In some embodiments, the circuit board 6 is provided with an electrical connector 62 connected to the surface of the circuit board 6 away from the battery cell shell 511, and the electrode terminal 512 is welded to the electrical connector 62 after passing through the through hole 61, so that the electrical connection between the electrode terminal 512 and the circuit board 6 is stable.

[0115] Figure 14 The flow chart of the method for manufacturing the battery pack provided by some embodiments of the present application. Through the method for manufacturing the battery pack as shown in Figure 14 The battery cell assembly 5 can be fixed in the first shell 1 and the second shell 2 through the first support 3 and the second support 4, which is beneficial to the production of the battery pack.

[0116] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery pack characterized by comprising: The battery pack comprises: a first shell and a second shell arranged along a first direction; a first support and a second support arranged along the first direction; a cell assembly arranged between the first support and the second support along the first direction, the cell assembly comprising a plurality of cells stacked along a second direction; the first support is provided with a plurality of third recesses corresponding to the cells, the plurality of third recesses are arranged along the second direction, and a portion of the cell shell close to the first support is arranged in the third recess, and the cell shell and the third recess are fixed by a third adhesive; the second support is provided with a plurality of third recesses corresponding to the cells, the plurality of third recesses are arranged along the second direction, and a portion of the cell shell close to the second support is arranged in the third recess, and the cell shell and the third recess are fixed by a third adhesive; a first adhesive for fixing the first support to the first shell; a second adhesive for fixing the second support to the second shell.

2. The battery pack of claim 1, wherein, The first shell forms a first space, and the second shell forms a second space, the first space and the second space are communicated to form a containing space, and the cell assembly is arranged in the containing space.

3. The battery pack of claim 2, wherein, The first shell comprises a first main body and a plurality of first side walls connected to the first main body, the second shell comprises a second main body and a plurality of second side walls connected to the second main body, the first main body and the second main body are arranged at intervals along the first direction, the first support is fixed to the first main body, the second support is fixed to the second main body, and the first side walls are connected to the second side walls.

4. The battery pack of claim 1, wherein, The cell assembly comprises a plurality of cells, the battery pack further comprises a circuit board, the cells are connected to the circuit board, and at least one of the first shell and the second shell is provided with a first groove, and at least a portion of the circuit board is arranged in the first groove.

5. The battery pack of claim 4, wherein, At least one of the first shell and the second shell is provided with a first structure protruding towards a side where the cell assembly is located, and the first groove is arranged in the first structure.

6. The battery pack of claim 1, wherein, One of the first support and the first shell is provided with a first recess, and the other is provided with a first protrusion arranged in the first recess; and / or one of the second support and the second shell is provided with a second recess, and the other is provided with a second protrusion arranged in the second recess.

7. The battery pack of claim 4, wherein, The third recess is arranged along a third direction, the cell assembly and the circuit board are arranged along the third direction, the circuit board is connected to the electrode terminal of the cell, and the third direction is perpendicular to the first direction and the second direction.

8. The battery pack of claim 1, wherein, Further comprising a connecting member for connecting with an external device, the connecting member is arranged on the first shell or the second shell.

9. The battery pack of claim 4, wherein, Along the first direction, the cell shell is arranged between the first support and the second support.

10. A method of manufacturing a battery pack, characterized by, The battery pack comprises: The application provides an electric cell assembly, a first support, a second support, and a battery module. The first support and the second support are arranged on opposite sides of the electric cell assembly along a first direction to form the battery module. The electric cell assembly comprises a plurality of electric cells arranged in a second direction. The first support is provided with a third recess corresponding to the electric cells. A plurality of third recesses are arranged along the second direction. A part of the electric cell shell close to the first support is arranged in the third recess. The electric cell shell and the third recess are fixed by a third adhesive substance. The second support is provided with a third recess corresponding to the electric cells. A plurality of third recesses are arranged along the second direction. A part of the electric cell shell close to the second support is arranged in the third recess. The electric cell shell and the third recess are fixed by a third adhesive substance. The application provides a first shell. A first adhesive substance is arranged in the first shell or on the surface of the first support. The battery module is arranged in the first shell along a first direction. The application provides a second shell. A second adhesive substance is arranged in the second shell or on the surface of the second support. The second shell and the first shell are connected along the first direction. The battery module is arranged in the first shell and the second shell.

11. The method of producing a battery pack according to claim 10, wherein Before the battery module is arranged in the first shell along a first direction, the application further provides: The application provides an electric circuit board provided with a through hole. The electric cell assembly comprises a plurality of electric cells. Each electric cell comprises an electric cell shell, an electrode terminal and an electrode assembly arranged in the electric cell shell. The electrode terminal is connected to the electrode assembly and extends out of the electric cell shell. The electrode terminal is welded to the surface of the electric circuit board away from the electric cell shell after passing through the through hole.

12. An electrical device, characterized by The application provides a battery pack comprising the battery module according to any one of claims 1 to 9.

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