Battery assembly and electric equipment

Abstract

The utility model discloses a battery assembly and electric equipment, and belongs to the technical field of batteries, the battery assembly comprises an inner string battery, the inner string battery comprises a shell, a plurality of naked battery cells and a heat dissipation part, each naked battery cell comprises a battery cell body and a tab which are connected with each other, the battery cell body is arranged in the shell, at least part of the tab is arranged outside the shell, and the heat dissipation part is arranged in the shell; the heat dissipation part is arranged in the shell and is arranged between the battery cell bodies of the two adjacent naked battery cells; and the circuit board is arranged outside the shell and is electrically connected with the tabs of the plurality of naked battery cells. By using the internal series batteries, the number of parts of the battery assembly is reduced, the assembly process is reduced, and the assembly efficiency is improved; according to the battery pack, the plurality of naked battery cells are fixedly accommodated through the shell, and the heat dissipation effect is achieved through the heat dissipation parts arranged between the battery cell bodies of the two adjacent naked battery cells, so that the thickness of the battery is reduced, and the space utilization rate and the capacity of the battery pack can be improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery assembly and electrical equipment. Background Art

[0002] Existing gaming laptop batteries are designed with a stacked structure. There is a layer of foam between the upper and lower battery cells to dissipate heat and reserve expansion space. Before the welding process, the two battery cells need to be fixed together with foam. Too many components increase the battery assembly process, greatly affecting production efficiency. Utility Model Content

[0003] Purpose of the utility model: The embodiment of the present application provides a battery assembly, aiming to solve the technical problems that the current battery assembly requires foam, has many assembly steps and low efficiency.

[0004] Technical solution: The embodiment of the present application provides a battery assembly, including:

[0005] An inner series battery, the inner series battery comprising a shell, a plurality of bare cells and a heat dissipation portion, the bare cells comprising a cell body and a tab connected to each other, the cell body being arranged in the shell, at least a portion of the tab being arranged outside the shell, the heat dissipation portion being arranged in the shell and between the cell bodies of two adjacent bare cells;

[0006] A circuit board is arranged outside the shell and is electrically connected to the tabs of the plurality of bare cells.

[0007] In some embodiments, the battery assembly includes a plurality of the inner-series batteries, and each of the inner-series batteries is electrically connected to the circuit board via its own tab.

[0008] In some embodiments, the battery assembly has a length direction, and along the length direction, the inner series batteries are respectively connected to two sides of the circuit board.

[0009] In some embodiments, the circuit board is provided with a notch, and at least one of the inner-series batteries is disposed in the notch and is electrically connected to the circuit board.

[0010] In some embodiments, the inner-series battery has a thickness direction, the plurality of bare cells of the inner-series battery are arranged along the thickness direction, and the tabs of each of the bare cells are connected to the same side of the circuit board along the thickness direction.

[0011] In some embodiments, the inner-series battery has a thickness direction, the plurality of bare cells of the inner-series battery are arranged along the thickness direction, and the tabs of two adjacent bare cells are respectively connected to opposite sides of the circuit board along the thickness direction.

[0012] In some embodiments, along the thickness direction, the orthographic projection of each of the pole tabs of the inner-series battery is located outside the orthographic projections of the other pole tabs.

[0013] In some embodiments, the shell includes a first shell and a second shell, the first shell is connected to the second shell and encloses to form a receiving cavity, and the battery cell body and the heat dissipation part are arranged in the receiving cavity.

[0014] In some embodiments, the inner string battery has a thickness direction, the first shell includes a first main body and a first connecting part surrounding and connected to the first main body, the second shell includes a second main body and a second connecting part surrounding and connected to the second main body, the first main body and the second main body are arranged opposite to each other along the thickness direction, and the first connecting part and the second connecting part are connected.

[0015] The present application also discloses an electrical device, comprising the above-mentioned battery assembly.

[0016] Beneficial effects: The battery assembly of the embodiment of the present application includes: an inner-series battery, the inner-series battery includes a shell, a plurality of bare cells and a heat dissipation part, the bare cells include a cell body and a tab connected to each other, the cell body is arranged in the shell, at least part of the tab is arranged outside the shell, the heat dissipation part is arranged in the shell, and is arranged between the cell bodies of two adjacent bare cells; a circuit board is arranged outside the shell and is electrically connected to the tabs of the plurality of bare cells. By using inner-series batteries, a plurality of bare cells are integrated into a single module and connected to the circuit board, the foam structure between the cells is eliminated, the number of parts of the battery assembly is reduced, the assembly process is reduced, and the assembly efficiency is improved; the plurality of bare cells are fixedly accommodated by the shell, and the heat dissipation effect is achieved by the heat dissipation part arranged between the cell bodies of two adjacent bare cells, the battery thickness is reduced, and the space utilization and capacity of the battery assembly can be improved.

[0017] An electrical device according to an embodiment of the present application includes the above-mentioned battery assembly, and thus can have all the technical features and beneficial effects of the above-mentioned battery assembly, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of a battery assembly according to an embodiment of the present application;

[0020] Figure 2 yes Figure 1 Schematic diagram of top view;

[0021] Figure 3 yes Figure 1 A schematic diagram of the main view;

[0022] Figure 4 is a schematic diagram of the exploded structure of the batteries in series in the battery assembly of the embodiment of the present application;

[0023] Figure 5 It is a schematic diagram of the structure of the circuit board in the battery assembly of an embodiment of the present application.

[0024] Figure numerals: 10, internal series battery; 101, shell; 102, bare cell; 103, heat dissipation part; 1021, cell body; 1022, pole ear; 20, circuit board; 200, notch; 1011, first shell; 1012, second shell; 10110, first connecting part; 10120, second connecting part. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0026] In the description of the present application, it should be understood that the terms "length", "thickness", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0027] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked with X represents the length direction X of the battery assembly, and the arrow marked with Y represents the thickness direction of the inner series battery. The length direction X is introduced to more clearly describe the structure and relative position relationship of each component in the battery assembly, and the thickness direction Y is introduced to more clearly describe the structure and relative position relationship of each component in the inner series battery. In actual applications, the length direction X and the thickness direction Y may change according to different placement methods of the battery assembly.

[0028] Existing gaming laptop batteries are designed as a stacked structure, with a layer of foam between the upper and lower battery cells to dissipate heat and reserve expansion space. Before the welding process, the two battery cells need to be glued together with foam, so the battery thickness is larger, resulting in a lower overall capacity. At the same time, too many components increase the battery assembly process, greatly affecting production efficiency.

[0029] In view of this, an embodiment of the present application provides a battery assembly, aiming to solve at least one of the above-mentioned technical problems.

[0030] A battery assembly of the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0031] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, the battery assembly of the embodiment of the present application includes: an inner series battery 10 and a circuit board 20; the inner series battery 10 is electrically connected to the circuit board 20, and the circuit board 20 can protect the charging and discharging process of the inner series battery 10.

[0032] Specifically, Figure 4As shown, the inner series battery 10 includes a shell 101, a plurality of bare cells 102 and a heat dissipation portion 103, the bare cells 102 include a cell body 1021 and a tab 1022 connected to each other, the cell body 1021 is arranged in the shell 101, at least part of the tab 1022 is arranged outside the shell 101, and the heat dissipation portion 103 is arranged in the shell 101 and between the cell bodies 1021 of two adjacent bare cells 102; it should be understood that the shell 101, the plurality of bare cells 102 and the heat dissipation portion 103 The internal series batteries 10 are composed to form an integral module. During the assembly process of the battery assembly, there is no need to use foam to buffer and dissipate heat for the battery cells arranged up and down in the battery assembly. The accommodating cavity formed inside the shell 101 can accommodate and fix multiple bare battery cells 102. The heat dissipation part 103 arranged between two adjacent bare battery cells 102 can dissipate heat for the battery cells inside the battery. The heat dissipation part 103 is mainly a heat sink structure, which is made of consumables with high thermal conductivity, such as thermal conductive silicone sheets, boron nitride sheets, nano-composite materials, etc. It should be noted that the battery assembly of the present application adopts an inner-string battery 10 to replace the traditional battery cell and foam structure. Considering that the inner-string battery 10 includes a shell 101, a plurality of bare batteries 102 and a heat dissipation portion 103, the shell 101 makes the adjacent bare batteries 102 highly aligned, and the heat dissipation portion 103 is a heat sink, which further avoids the existence of gaps between adjacent bare batteries 102, which can further solve the problem of poor welding between the battery cell tabs 1022 and the circuit board 20, resulting in inconsistent batteries; furthermore, the structure of the heat sink is thinner than the thickness of the foam, therefore, the overall thickness of the inner-string battery 10 is reduced, more bare batteries 102 can be arranged, and the space utilization and capacity of the battery assembly are improved.

[0033] In the present application, the circuit board 20 is disposed outside the housing 101 and is electrically connected to the tabs 1022 of the plurality of bare cells 102. The circuit board 20 is integrated with a circuit protection module. Specifically, an opening can be opened on the housing 101, and the circuit board 20 can be at least partially embedded in the housing 101 to be electrically connected to the tabs 1022 of the bare cells 102, or the tabs 1022 of the bare cells 102 can be at least partially passed through the opening to be electrically connected to the circuit board 20 (e.g., Figure 3 shown).

[0034] In some embodiments, the battery assembly includes a plurality of inner series batteries 10, each of which is electrically connected to the circuit board 20 through its own tab 1022. Considering that the size of the inner series battery 10 is not limited, the size of the battery assembly is also not limited. Therefore, according to the power demand of the electrical equipment, as many inner series batteries as possible can be arranged. Considering that the thickness of the laptop battery is relatively thicker than that of the thin and light notebook, and the traditional stacking structure using foam takes up space in the thickness of the battery assembly, reduces the battery capacity, and also increases the material, which is not conducive to automation, increases the difficulty of assembling the battery assembly, and affects the production efficiency. Therefore, the present application arranges a plurality of inner series batteries 10, under the same thickness conditions, the number of bare cells 102 is more, the battery capacity is larger, and the inner series battery 10 is an integral module, and the assembly difficulty is low. It is only necessary to connect the tab 1022 of the inner series battery 10 to the circuit board 20.

[0035] In some embodiments, the battery assembly has a length direction, and along the length direction, the two sides of the circuit board 20 are respectively connected to the inner series battery 10. In other embodiments, the circuit board 20 is provided with a notch 200 (such as Figure 5 As shown in FIG. 2 , at least one inner series battery 10 is disposed in the notch 200 and is electrically connected to the circuit board 20. This allows more inner series batteries 10 to be assembled in a limited space to obtain a larger battery capacity and meet the power requirements of the notebook. Figure 1 , Figure 2 , Figure 5 The battery assembly and circuit 20 shown in the figure have three inner-series batteries 10 arranged along the length direction X. The circuit board 20 is an integrated structure constructed in a U shape, and includes a first board segment, a second board segment and a third board segment from left to right. The first board segment and the third board segment are respectively located between two adjacent inner-series batteries 10, and the second board segment is located on the outside of the inner-series battery 10 located in the middle, and extends along the length direction X, serving to connect the first board segment and the third board segment. Such a structural layout can save installation space. In addition, the circuit board 20 can also adopt a split structure, for example, the first board segment and the third board segment are rigid PCB boards, and the second board segment is a flexible FPC board. The main electronic components constituting the protection circuit are arranged on the first board segment and the third board segment, and the second board segment mainly serves as an electrical connection.

[0036] In some embodiments, the inner series battery 10 has a thickness direction, and the multiple bare cells 102 of the inner series battery 10 are arranged along the thickness direction, and the tabs 1022 of each bare cell 102 are connected to the same side of the circuit board 20 along the thickness direction. Considering the increase in the number of bare cells 102, they are arranged along the thickness direction. When connected to the circuit board 20, the bare cells 102 away from the circuit board 20 can use flexible connectors as the intermediate transition connection between the tabs 1022 and the circuit board 20. In other embodiments, the inner series battery 10 has a thickness direction, and the multiple bare cells 102 of the inner series battery 10 are arranged along the thickness direction, and the tabs 1022 of two adjacent bare cells 102 are respectively connected to the two sides of the circuit board 20 that are away from each other along the thickness direction. Furthermore, along the thickness direction, the orthographic projection of each tab 1022 of the inner series battery 10 is located outside the orthographic projection of other tabs 1022. The above arrangement methods are all for providing the optimal connection method between the tabs 1022 of the bare cell 102 and the circuit board 20, which is beneficial to the assembly process.

[0037] In some embodiments, the housing 101 includes a first housing 1011 and a second housing 1012, the first housing 1011 and the second housing 1012 are connected and enclosed to form a receiving cavity, and the battery body 1021 and the heat dissipation portion 103 are arranged in the receiving cavity. The inner series battery 10 has a thickness direction, the first housing 1011 includes a first main body and a first connecting portion 10110 surrounding and connected to the first main body, the second housing 1012 includes a second main body and a second connecting portion 10120 surrounding and connected to the second main body, the first main body and the second main body are arranged oppositely along the thickness direction, and the first connecting portion 10110 and the second connecting portion 10120 are connected. It should be understood that the first shell 1011 and the second shell 1012 are both formed with a groove that is recessed to one side. The first shell 1011 and the second shell 1012 are arranged relative to each other so that the two are enclosed to form a accommodating cavity. The first connecting portion 10110 and the second connecting portion 10120 can be formed by the edges reserved when the shell is die-cast to form the groove, and are used for fixed connection between the first shell 1011 and the second shell 1012. The specific connection method includes but is not limited to welding, connecting parts and gluing.

[0038] The present application also discloses an electric device, including the above-mentioned battery assembly. The electric device can be various types of equipment such as new energy vehicles, notebooks, energy storage and power supply devices, etc. It can be understood that the electric device includes the battery assembly of the above-mentioned embodiment, and thus can have all the technical features and technical effects of the above-mentioned battery assembly, which will not be repeated here.

[0039] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0040] The above is a detailed introduction to a battery assembly and electrical equipment provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery assembly, characterized in that: include: An inner-series battery (10), the inner-series battery (10) comprising a shell (101), a plurality of bare cells (102) and a heat dissipation portion (103), the bare cells (102) comprising a cell body (1021) and a tab (1022) connected to each other, the cell body (1021) being arranged in the shell (101), at least a portion of the tab (1022) being arranged outside the shell (101), the heat dissipation portion (103) being arranged in the shell (101) and between the cell bodies (1021) of two adjacent bare cells (102); The circuit board (20) is arranged outside the housing (101) and is electrically connected to the tabs (1022) of the plurality of bare cells (102).

2. The battery assembly according to claim 1, characterized in that: The battery assembly comprises a plurality of the inner-series batteries (10), and each of the inner-series batteries (10) is electrically connected to the circuit board (20) via its own tab (1022).

3. The battery assembly according to claim 1, characterized in that: The battery assembly has a length direction, and along the length direction, the two sides of the circuit board (20) are respectively connected to the inner series batteries (10).

4. The battery assembly according to claim 1, characterized in that: The circuit board (20) is provided with a notch (200), and at least one of the inner-series batteries (10) is arranged in the notch (200) and is electrically connected to the circuit board (20).

5. The battery assembly according to claim 1, characterized in that: The inner-series battery (10) has a thickness direction, the plurality of bare cells (102) of the inner-series battery (10) are arranged along the thickness direction, and the tabs (1022) of each bare cell (102) are connected to the same side of the circuit board (20) along the thickness direction.

6. The battery assembly according to claim 1, characterized in that: The inner series battery (10) has a thickness direction, the plurality of bare cells (102) of the inner series battery (10) are arranged along the thickness direction, and the tabs (1022) of two adjacent bare cells (102) are respectively connected to opposite sides of the circuit board (20) along the thickness direction.

7. The battery assembly according to claim 5 or 6, characterized in that: Along the thickness direction, the orthographic projection of each of the pole ears (1022) of the inner-series battery (10) is located outside the orthographic projections of the other pole ears (1022).

8. The battery assembly according to claim 1, characterized in that: The housing (101) comprises a first outer shell (1011) and a second outer shell (1012); the first outer shell (1011) and the second outer shell (1012) are connected to form a receiving cavity; the battery cell body (1021) and the heat dissipation portion (103) are arranged in the receiving cavity.

9. The battery assembly according to claim 8, characterized in that: The inner series battery (10) has a thickness direction, the first shell (1011) includes a first main body and a first connecting portion (10110) surrounding and connected to the first main body, the second shell (1012) includes a second main body and a second connecting portion (10120) surrounding and connected to the second main body, the first main body and the second main body are arranged opposite to each other along the thickness direction, and the first connecting portion (10110) and the second connecting portion (10120) are connected.

10. An electrical device, characterized in that: Comprising the battery assembly as described in any one of claims 1-9.

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