Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, and relates to the technical field of batteries. The battery comprises a box body and a plurality of battery monomers, and an accommodating space is formed in the box body; the plurality of single batteries are accommodated in the accommodating space; the volume of the accommodating space is V, the number of the battery monomers is n, the volume of the battery monomers is V1, nV1 / V is more than or equal to 35% and less than or equal to 95%, and the sum of the volumes of all the battery monomers occupies 35-95% of the volume of the accommodating space, so that the internal space of the box body is fully utilized to improve the energy density of the battery. Besides, the single batteries do not occupy the accommodating space completely, so that enough space is provided for installation and fixation of the single batteries in the box body and heat dissipation of the single batteries, and the reliability and the safety of the whole structure of the battery are guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and more particularly, to a battery and an electrical device using the same. Background Art

[0002] Currently, the batteries most commonly used in vehicles are generally lithium-ion batteries. As a rechargeable battery, lithium-ion batteries have the advantages of small size, high energy density, high power density, many cycles of use, and long storage time.

[0003] A battery generally includes a box body and battery cells. The battery cells are accommodated in the box body. The full utilization of the internal space of the box body by the battery cells is beneficial to improving the energy density of the battery, so as to meet the power consumption requirements. Therefore, how to ensure the energy density of the battery has become an urgent problem to be solved in the technical field of batteries. Summary of the Invention

[0004] Embodiments of this application provide a battery and an electrical device using the same to improve the energy density of the battery.

[0005] In a first aspect, embodiments of this application provide a battery, including a box body and a plurality of battery cells. An accommodation space is formed inside the box body; the plurality of battery cells are accommodated in the accommodation space; the volume of the accommodation space is V, the number of battery cells is n, and the volume of each battery cell is V1, satisfying 35% ≤ nV1 / V ≤ 95%.

[0006] In the above technical solution, the volume V of the accommodation space of the box body, the number n of battery cells, and the volume V1 of each battery cell satisfy 35% ≤ nV1 / V ≤ 95%, ensuring that the sum of the volumes of all battery cells occupies 35% - 95% of the volume of the accommodation space, so as to fully utilize the internal space of the box body to improve the energy density of the battery. In addition, the battery cells do not completely occupy the accommodation space, providing sufficient space for the installation and fixation of the battery cells in the box body and the heat dissipation of the battery cells, thus ensuring the reliability and safety of the overall structure of the battery.

[0007] In some embodiments of the first aspect of this application, 50% ≤ nV1 / V ≤ 80%.

[0008] In the above technical solution, 50% ≤ nV1 / V ≤ 80%, that is, the sum of the volumes of all battery cells occupies 50% - 80% of the volume of the accommodation space, so as to fully utilize the internal space of the box body to improve the energy density of the battery. In addition, the battery cells do not completely occupy the accommodation space, providing sufficient space for the installation and fixation of the battery cells in the box body and the heat dissipation of the battery cells, thus ensuring the reliability and safety of the overall structure of the battery.

[0009] In some embodiments of the first aspect of the present application, the battery includes a plurality of battery cells, the plurality of battery cells are arranged to form a battery pack, and the battery further includes a first adhesive layer, and the battery pack is bonded to the box body through the first adhesive layer.

[0010] In the above technical solution, the battery cells are bonded and fixed in the box body through the first adhesive layer. Through bonding, the installation and fixation of the battery cells in the box body are more convenient. Compared with fixing the battery cells in the box body through a beam structure, the space occupied by the first adhesive layer inside the box body is smaller, so that the accommodation space of the box body can accommodate more battery cells, which is beneficial to improving the energy density of the battery.

[0011] In some embodiments of the first aspect of the present application, the battery pack has a first surface for bonding to the box body, the area of the first surface is S, and the area of the first adhesive layer in contact with the first surface is S1, satisfying: S1≥0.4S.

[0012] In the above technical solution, the area S of the first surface of the battery pack for bonding to the box body and the area S1 of the first adhesive layer in contact with the first surface satisfy S1≥0.4S, so that there is sufficient connection strength between the battery pack and the box body, and the connection stability between the battery pack and the box body is improved.

[0013] In some embodiments of the first aspect of the present application, S1≥0.6S.

[0014] In the above technical solution, S1≥0.6S, so that the connection strength between the battery pack and the box body is better, and the connection stability between the battery pack and the box body is further improved.

[0015] In some embodiments of the first aspect of the present application, the battery cell includes a housing, an end cap and an electrode terminal, the housing has an opening, the end cap is used to seal the opening, and the electrode terminal is arranged on the end cap; at least part of the outer surface of the housing of at least part of the battery cells together forms the first surface.

[0016] In the above technical solution, at least part of the outer surface of the housing of at least part of the battery cells together forms the first surface. It can be understood that at least part of the outer surface of at least part of the battery cells is bonded to the box body, which makes the bonding between the battery pack and the box body more convenient, and can avoid interference between the first adhesive layer and the structures on the end cap (such as electrode terminals, pressure relief mechanisms), which affects the bonding performance of the first adhesive layer and / or affects the structures on the end cap from playing their roles.

[0017] In some embodiments of the first aspect of the present application, the bonding strength P of the first adhesive layer satisfies: P≥6Mpa.

[0018] In the above technical solution, the bonding strength P of the first adhesive layer satisfies: P≥6Mpa, so that the first adhesive layer has a strong bonding ability, thereby improving the bonding stability between the battery pack and the box body.

[0019] In some embodiments of the first aspect of the present application, P ≥ 9 MPa.

[0020] In the above technical solution, P ≥ 9 MPa enables the first adhesive layer to have strong bonding ability, thereby improving the bonding stability between the battery pack and the box body.

[0021] In some embodiments of the first aspect of the present application, the thickness M of the first adhesive layer satisfies: 0.1 mm ≤ M ≤ 6 mm.

[0022] In the above technical solution, 0.1 mm ≤ M ≤ 6 mm ensures that the first adhesive layer has good connection strength between the battery pack and the box body, and at the same time makes the volume of the first adhesive layer smaller, thereby reducing the occupation of the accommodation space of the box body by the first adhesive layer, and leaving more space for the accommodation space to accommodate battery cells, which is beneficial to improving the energy density of the battery.

[0023] In some embodiments of the first aspect of the present application, 0.5 mm ≤ M ≤ 3 mm.

[0024] In the above technical solution, 0.5 mm ≤ M ≤ 3 mm. In this case, the connection strength of the first adhesive layer is better, ensuring good connection strength between the battery pack and the box body, making the volume of the first adhesive layer smaller, thereby reducing the occupation of the accommodation space of the box body by the first adhesive layer, and leaving more space for the accommodation space to accommodate battery cells, which is beneficial to improving the energy density of the battery. In addition, 0.5 mm ≤ M ≤ 3 mm can also endow the first adhesive layer with certain buffering performance between the battery pack and the box body, reducing the risk of battery cells being damaged by impact.

[0025] In some embodiments of the first aspect of the present application, the weight of the first adhesive layer is W1, and the weight of the battery is W2, satisfying: 0.0001 ≤ W1 / W2 ≤ 0.001.

[0026] In the above technical solution, 0.0001 ≤ W1 / W2 ≤ 0.001 ensures that the first adhesive layer has good connection strength between the battery pack and the box body, and at the same time makes the proportion of the weight of the first adhesive layer in the weight of the entire battery smaller, thereby reducing the occupation of the accommodation space of the box body by the first adhesive layer, and leaving more space for the accommodation space to accommodate battery cells, which is beneficial to improving the energy density of the battery.

[0027] In some embodiments of the first aspect of the present application, the weight of the first adhesive layer is W1, and the sum of the weights of multiple battery cells is W3, satisfying: 0.0004 ≤ W1 / W3 ≤ 0.002.

[0028] In the above technical solution, 0.0004≤W1 / W3≤0.002, so that the amount of the first adhesive layer is sufficient to stably bond the battery cell to the box body, while the amount of the first adhesive layer is reduced as much as possible, thereby reducing the occupation of the first adhesive layer by the storage space of the box body, thereby leaving more space for the storage space to accommodate the battery cell, which is beneficial to improving the energy density of the battery.

[0029] In some embodiments of the first aspect of the present application, the battery further includes a support member; the battery cell includes an outer shell and an electrode terminal, the outer shell includes a first wall for mounting the electrode terminal, and along the thickness direction of the first wall, the box body includes a second wall opposite to the first wall, and the support member is supported between the first wall and the second wall.

[0030] In the above technical solution, the support member is supported between the first wall of the battery cell and the second wall of the box body, which can improve the stability of the battery cell when installed in the box body.

[0031] In some embodiments of the first aspect of the present application, the support member includes a first supporting portion, a second supporting portion and a first connecting portion, the first connecting portion is attached to the second wall, and along a preset direction, the first supporting portion and the second supporting portion are connected to the first connecting portion at intervals, and one end of the first supporting portion facing away from the first connecting portion and one end of the second supporting portion facing away from the first connecting portion are respectively attached to the first walls of two adjacent battery cells.

[0032] In the above technical solution, the support member can be attached to the first wall of two adjacent battery cells to improve the connection stability of the two adjacent battery cells within the box. Furthermore, a single support member can support two adjacent battery cells, allowing a smaller number of support members to support multiple battery cells, thereby reducing the impact of the support member arrangement on the battery's energy density.

[0033] In some embodiments of the first aspect of the present application, the battery further includes a second adhesive layer, and the support member is connected to the first wall through the second adhesive layer.

[0034] In the above technical solution, the support member is connected to the first wall through the second adhesive layer, which can maintain a stable supporting relationship between the support member and the first wall, improve the ability to withstand external forces such as vibration and impact, and thus reduce the risk of failure of the support member to support the battery cell.

[0035] In a second aspect, an embodiment of the present application provides an electrical device, comprising the battery provided in any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 Schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0038] Figure 2 Explosion diagram of a battery provided in some embodiments of the present application;

[0039] Figure 3 Explosion diagram of a battery provided in some other embodiments of the present application;

[0040] Figure 4 Explosion diagram of a battery provided in some other embodiments of the present application;

[0041] Figure 5 Schematic structural diagram of a battery module provided in some embodiments of the present application;

[0042] Figure 6 Cross-sectional view of a battery provided in some embodiments of the present application;

[0043] Figure 7 Cross-sectional view of a battery provided in some other embodiments of the present application;

[0044] Figure 8 Explosion diagram of a battery cell provided in some embodiments of the present application;

[0045] Figure 9 Schematic diagram of a battery pack formed by arranging multiple battery cells provided in some embodiments of the present application;

[0046] Figure 10 Schematic diagram of a battery pack formed by arranging multiple battery cells provided in some other embodiments of the present application;

[0047] Figure 11 Schematic diagram of a battery pack formed by arranging multiple battery cells provided in some other embodiments of the present application;

[0048] Figure 12 Cross-sectional view of a battery provided in some embodiments of the present application;

[0049] Figure 13 Cross-sectional view of a battery provided in some other embodiments of the present application;

[0050] Figure 14 Schematic structural diagram of a support provided in some embodiments of the present application;

[0051] Figure 15 A cross-sectional view of the battery provided for some further embodiments of the present application;

[0052] Figure 16 A cross-sectional view of the battery provided for some other embodiments of the present application.

[0053] Reference numerals: 1000 - vehicle; 100 - battery; 10 - box body; 11 - accommodation space; 12 - first part; 13 - second part; 14 - second wall; 20 - battery cell; 21 - outer shell; 211 - housing; 2111 - opening; 212 - end cap; 213 - first wall; 22 - electrode assembly; 221 - tab; 221a - positive tab; 221b - negative tab; 23 - electrode terminal; 23a - positive electrode terminal; 23b - negative electrode terminal; 24 - current collector member; 25 - pressure relief mechanism; 26 - liquid injection hole; 20a - battery module; 20b - battery pack; 21b - first surface; 30 - pressing plate; 40 - bus bar component; 50 - first adhesive layer; 60 - heat dissipation structure; 70 - support member; 80 - second adhesive layer; 200 - controller; 300 - motor. X - first direction; Y - second direction; third direction. Detailed Description of the Embodiments

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0056] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0057] It should be noted that like reference numerals and letters denote like items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0058] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is 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 should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0059] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely applied to electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing.

[0060] The development of battery technology needs to consider various design factors at the same time. For example, performance parameters such as safety performance, cycle life, discharge capacity, charge and discharge rate, etc. In addition, the energy density of the battery also needs to be considered.

[0061] The inventor found that the battery includes a box body and a plurality of battery cells. The box body forms an accommodation space for accommodating a plurality of battery cells. The battery cells also include other structures accommodated in the accommodation space, such as a connection structure for installing the battery cells in the box body, a heat dissipation structure for assisting the battery cells to dissipate heat, etc. If the other structures occupy too much of the accommodation space of the box body, the part of the accommodation space for accommodating the battery cells will be smaller, resulting in a smaller energy density of the battery and a high cost; if the other structures occupy too little of the accommodation space of the box body, although the part of the accommodation space of the box body for accommodating the battery cells is larger and the energy density of the battery is larger, it may lead to problems such as insufficient connection strength of the connection structure and poor heat dissipation ability of the heat dissipation structure, thereby reducing the reliability and safety of the battery.

[0062] Based on the above considerations, in order to alleviate the problem that the reliability and safety of the battery and the energy density of the battery cannot be taken into account at the same time, the inventor has conducted in-depth research and designed a battery. The volume of the accommodation space of the box body of the battery is V, the number of battery cells is n, and the volume of each battery cell is V1, satisfying 35% ≤ nV1 / V ≤ 95%.

[0063] The volume V of the accommodation space of the box body, the number n of battery cells, and the volume V1 of the battery cell satisfy 35% ≤ nV1 / V ≤ 95%, ensuring that the sum of the volumes of all battery cells occupies 35% - 95% of the volume of the accommodation space, thereby making full use of the internal space of the box body to improve the energy density of the battery. In addition, the battery cells do not completely occupy the accommodation space, providing sufficient space for the installation and fixation of the battery cells in the box body and for the heat dissipation of the battery cells, thereby ensuring the reliability and safety of the overall battery structure.

[0064] The battery disclosed in the embodiments of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft, and can also be used in a power supply system of the electrical equipment composed of the battery disclosed in the present application. In this way, the battery has a relatively high energy density and better reliability and safety.

[0065] The embodiments of the present application provide an electrical equipment using a battery as a power source. The electrical equipment can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0066] For the convenience of description in the following embodiments, an electrical equipment of an embodiment of the present application is taken as an example of a vehicle 1000 for description.

[0067] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery 100 is arranged inside the vehicle 1000. The battery 100 can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for the power supply of the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0068] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0069] Please refer to Figure 2 , Figure 3 , Figure 4. The battery 100 includes a box body 10 and battery cells 20, and the battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space 11 for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first part 12 and a second part 13, the first part 12 and the second part 13 cover each other, and the first part 12 and the second part 13 jointly define the accommodation space 11 for accommodating the battery cells 20. As Figure 2 shown, the first part 12 and the second part 13 may also be hollow structures with one side open to form an accommodation cavity for accommodating the battery cells 20, and the open side of the first part 12 covers the open side of the second part 13. As Figure 3 shown, the second part 13 may be a hollow structure with one end open to form an accommodation cavity for accommodating the battery cells 20, and the first part 12 may be a plate-like structure. The first part 12 covers the open side of the second part 13 so that the first part 12 and the second part 13 jointly define the accommodation space 11. Of course, the box body 10 formed by the first part 12 and the second part 13 can be of various shapes, such as a cylinder, a cuboid, etc.

[0070] As Figure 3 , Figure 4 shown, in some embodiments, the battery 100 further includes a pressing plate 30, and the pressing plate 30 is used to press all the battery cells 20 against the second part 13 so as to reduce the risk of the battery cells 20 moving inside the box body 10.

[0071] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box body 10; of course, the battery 100 can also be in the form of multiple battery cells 20 first connected in series, in parallel, or in a mixed connection to form battery modules 20a, and then the multiple battery modules 20a are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 10. The battery 100 may further include other structures. For example, as Figure 5As shown, the battery 100 may further include a busbar component 40 for realizing electrical connection between multiple battery cells 20. In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, parallel or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, parallel or in a series-parallel combination, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10. Of course, the battery 100 may also be in the form that multiple battery cells 20 are first connected in series, parallel or in a series-parallel combination to form battery modules 20a, and then the multiple battery modules 20a are connected in series, parallel or in a series-parallel combination to form a whole and are accommodated in the box 10. The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component 40 for realizing electrical connection between multiple battery cells 20. The state where the multiple battery cells 20 are not connected in series, parallel or in a series-parallel combination through the busbar component 40 is defined as a battery pack 20b.

[0072] The battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, etc. Figure 5 The shape of the battery cell 20 being a cuboid is shown in [].

[0073] In some embodiments, the battery 100 includes a box 10 and multiple battery cells 20. An accommodation space 11 is formed inside the box 10; the multiple battery cells 20 are accommodated in the accommodation space 11; the volume of the accommodation space 11 is V, the number of the battery cells 20 is n, and the volume of the battery cell 20 is V1, satisfying 35% ≤ nV1 / V ≤ 95%.

[0074] Then the other structures inside the box 10 account for 5% - 65% of the accommodation space 11. The other structures refer to the other structures inside the box 10 except for the battery cells 20, and the other structures include but are not limited to the connection structures for installing the battery cells 20 in the box 10 and the heat dissipation structures 60 ( Figure 7 shown in []).

[0075] If nV1 / V < 35%, then the other structures occupy too much of the accommodation space 11 of the box 10, and the space for accommodating the battery cells 20 in the accommodation space 11 is relatively small, resulting in a low energy density, low power and high cost of the battery 100. If nV1 / V > 95%, although the part of the accommodation space 11 of the box 10 for accommodating the battery cells 20 is relatively large and the energy density of the battery 100 is relatively large, the space occupied by the other structures is relatively small, which may lead to problems such as insufficient connection strength of the connection structures and poor heat dissipation capacity of the heat dissipation structures 60 ( Figure 7 shown in []), thus reducing the reliability and safety of the battery 100.

[0076] Among them, nV1 / V can be 40%, 45%, 50%, 55%, 60%, 70%, 75%, 80%, 85%, 90%, etc.

[0077] Therefore, the volume V of the accommodation space 11 of the box body 10, the number n of battery cells 20, and the volume V1 of the battery cells 20 satisfy 35% ≤ nV1 / V ≤ 95%, ensuring that the sum of the volumes of all the battery cells 20 occupies 35% - 95% of the volume of the accommodation space 11, thereby making full use of the internal space of the box body 10 to improve the energy density of the battery 100. In addition, the battery cells 20 do not completely occupy the accommodation space 11, providing sufficient space for the installation and fixation of the battery cells 20 in the box body 10 and the heat dissipation of the battery cells 20, thereby ensuring the reliability and safety of the overall structure of the battery 100.

[0078] Furthermore, 50% ≤ nV1 / V ≤ 80%.

[0079] For example, nV1 / V can be 52%, 53%, 54%, 56%, 58%, 62%, 63%, 64%, 66%, 68%, 72%, 74%, 76%, 78%, etc.

[0080] 50% ≤ nV1 / V ≤ 80%, that is, the sum of the volumes of all the battery cells 20 occupies 50% - 80% of the volume of the accommodation space 11, thereby making full use of the internal space of the box body 10 to improve the energy density of the battery 100. In addition, the battery cells 20 do not completely occupy the accommodation space 11, providing sufficient space for the installation and fixation of the battery cells 20 in the box body 10 and the heat dissipation of the battery cells 20, thereby ensuring the reliability and safety of the overall structure of the battery 100.

[0081] Such as Figure 6 、 Figure 7 As shown, in some embodiments, the battery 100 includes a plurality of battery cells 20, the plurality of battery cells 20 are arranged to form a battery pack 20b, and the battery 100 further includes a first adhesive layer 50, and the battery pack 20b is bonded to the box body 10 through the first adhesive layer 50.

[0082] The plurality refers to two or more. The battery pack 20b refers to the whole formed by all the battery cells 20 arranged in a certain manner and not connected in series or in parallel or in a mixed connection through a busbar component 40.

[0083] There are various arrangements of the plurality of battery cells 20. For example, as Figure 3 shown, the plurality of battery cells 20 are arranged along a first direction X, a second direction Y, and a third direction to form a battery pack 20b, wherein, two rows are formed in the first direction X, two rows are formed in the second direction Y, and seven columns are formed in the third direction, and the first direction X, the second direction Y, and the third direction are perpendicular to each other pairwise.

[0084] As Figure 5 shown, all the battery cells 20 can be stacked in a row along the first direction X to form a battery pack 20b.

[0085] The battery pack 20b and the box body 10 are bonded by the first adhesive layer 50, which means that at least part of the outer surface of the battery pack 20b and the inner surface of the box body 10 are bonded by the first adhesive layer 50, or at least part of the outer surface of the battery pack 20b and the surface of other structures (such as the heat dissipation structure 60( Figure 7 shown in) within the box body 10 are bonded by the first adhesive layer 50, thereby indirectly fixing the battery pack 20b within the box body 10. The outer surface of the battery pack 20b refers to the general name of the surfaces that can still be seen after the plurality of battery cells 20 are arranged. Exemplarily, as Figure 5 shown, along the first direction X, the two closest opposite surfaces of two adjacent battery cells 20 cannot be seen, and these two surfaces do not belong to the outer surface of the battery pack 20b, while the surfaces of the two battery cells 20 at the outermost ends along the first direction X that face away from the adjacent battery cells 20 can be seen and belong to a part of the outer surface of the battery pack 20b.

[0086] The first adhesive layer 50 can be formed by coating, and when the fluid first adhesive layer 50 solidifies, the battery pack 20b and the box body 10 are connected. Before the first adhesive layer 50 is bonded between the battery pack 20b and the box body 10, the first adhesive layer 50 can be a solid tape.

[0087] The battery cells 20 are bonded and fixed within the box body 10 by the first adhesive layer 50. Through bonding, the installation and fixation of the battery cells 20 within the box body 10 are more convenient. Compared with fixing the battery cells 20 within the box body 10 through a beam structure, the first adhesive layer 50 occupies less space inside the box body 10, enabling the accommodation space 11 of the box body 10 to accommodate more battery cells 20, which is beneficial to improving the energy density of the battery 100.

[0088] Please continue to refer to Figure 6 、 Figure 7 , in some embodiments, the battery pack 20b has a first surface 21b for bonding with the box body 10. The area of the first surface 21b is S, and the area of the first adhesive layer 50 in contact with the first surface 21b is S1, satisfying: S1≥0.4S.

[0089] At least a part of the outer surface of the battery pack 20b forms the first surface 21b.

[0090] When 0.4S < S1, the contact area between the first adhesive layer 50 and the first surface 21b of the battery pack 20b is small, and the contact area between the first adhesive layer 50 and the box body 10 or other structures inside the box body 10 is small, resulting in insufficient connection strength between the battery pack 20b and the box body 10. The battery pack 20b is prone to detachment relative to the box body 10, making the connection stability between the battery pack 20b and the box body 10 relatively poor.

[0091] The area S of the first surface 21b of the battery pack 20b used for bonding with the box body 10 and the area S1 of the first adhesive layer 50 in contact with the first surface 21b satisfy S1 ≥ 0.4S, so that the contact area between the first adhesive layer 50 and the first surface 21b of the battery pack 20b is large, and the contact area between the first adhesive layer 50 and the box body 10 or other structures inside the box body 10 is large. As a result, there is sufficient connection strength between the battery pack 20b and the box body 10, improving the connection stability between the battery pack 20b and the box body 10.

[0092] Furthermore, S1 ≥ 0.6S.

[0093] According to actual needs, the area S of the first surface 21b and the area S1 of the first adhesive layer 50 in contact with the first surface 21b may also satisfy other relationships. For example, 0.5S ≤ S1 ≤ 0.58S.

[0094] S1 ≥ 0.6S results in better connection strength between the battery pack 20b and the box body 10, further improving the connection stability between the battery pack 20b and the box body 10.

[0095] As Figure 8 shown, the battery cell 20 may include a housing 21 and an electrode assembly 22. The electrode assembly 22 is accommodated in the housing 21. The housing 21 includes a housing body 211 and an end cap 212. The housing body 211 has an opening 2111, and the end cap 212 is used to seal the opening 2111 of the housing body 211 to form a receiving portion for accommodating the electrode assembly 22.

[0096] The housing 21 can be of various shapes, such as a cylinder, a cuboid, etc. The shape of the housing 21 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a cylinder structure, the housing 21 can be selected as a cylinder structure; if the electrode assembly 22 is a cuboid structure, the housing 21 can be selected as a cuboid structure. Figure 8 An exemplary case where the housing 21 and the electrode assembly 22 are cuboids is shown.

[0097] The material of the housing 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc. The embodiments of the present application do not make special restrictions on this.

[0098] The electrode assembly 22 may include a positive electrode sheet (not shown in the figure), a negative electrode sheet (not shown in the figure), and a separator (not shown in the figure). The electrode assembly 22 may be a wound structure formed by winding the positive electrode sheet, the separator, and the negative electrode sheet, or may be a stacked structure formed by stacking the positive electrode sheet, the separator, and the negative electrode sheet. The electrode assembly 22 further includes a positive electrode tab 221a (not shown in the figure) and a negative electrode tab 221b (not shown in the figure). The positive current collector in the positive electrode sheet that is not coated with the positive electrode active material layer may be used as the positive electrode tab 221a, and the negative current collector in the negative electrode sheet that is not coated with the negative electrode active material layer may be used as the negative electrode tab 221b.

[0099] The accommodating portion is further configured to accommodate an electrolyte, such as an electrolytic solution. An electrode terminal 23 is provided on the end cap 212. The electrode terminal 23 is a component for outputting the electrical energy of the electrode assembly 22. The electrode terminal 23 is used to electrically connect to the electrode assembly 22, that is, the electrode terminal 23 is electrically connected to the tab 221 of the electrode assembly 22. For example, the electrode terminal 23 and the tab 221 are connected through a current collecting member 24 to achieve the electrical connection between the electrode terminal 23 and the tab 221.

[0100] It should be noted that the opening 2111 of the housing 211 may be one or two. If the opening 2111 of the outer shell 21 is one, the end cap 212 may also be one, and two electrode terminals 23 may be provided on the end cap 212. The two electrode terminals 23 are respectively used to electrically connect to the positive electrode tab 221a and the negative electrode tab 221b of the electrode assembly 22. The two electrode terminals 23 in the end cap 212 are respectively a positive electrode terminal 23a and a negative electrode terminal 23b. As Figure 3 shown, if the opening 2111 of the housing 211 is two, for example, the two openings 2111 are provided on opposite sides of the housing 211, the end cap 212 may also be two, and the two end caps 212 respectively cover the two openings 2111 of the housing 211. In this case, the electrode terminal 23 in one end cap 212 may be a positive electrode terminal 23a, which is used to electrically connect to the positive electrode tab 221a of the electrode assembly 22; the electrode terminal 23 in the other end cap 212 may be a negative electrode terminal 23b, which is used to electrically connect to the negative electrode sheet of the electrode assembly 22.

[0101] In some embodiments, a pressure relief mechanism 25 is further provided on the end cap 212. The pressure relief mechanism 25 is used to relieve the pressure inside the battery cell 20. The pressure relief mechanism 25 may be an explosion-proof valve, a weak part. A liquid injection hole 26 may also be provided on the end cap 212. The liquid injection hole 26 is used to supply the electrolytic solution to enter the inside of the battery cell 20.

[0102] In some embodiments, the battery cell 20 includes a housing 211, an end cap 212, and electrode terminals 23. The housing 211 has an opening 2111, the end cap 212 is used to seal the opening 2111, and the electrode terminals 23 are disposed on the end cap 212; a part of the outer surface of at least part of the housing 211 of the battery cell 20 together forms a first surface 21b.

[0103] Since no other structures are provided on the outer surface of the housing 211 of the battery cell 20 and the area of the outer surface of the housing 211 is large, a part of the outer surface of at least part of the housing 211 of the battery cell 20 together forms the first surface 21b, so that the first surface 21b of the battery pack 20b for bonding with the box body 10 is large enough, thereby providing a sufficient contact area for connection with the box body 10.

[0104] According to the number and arrangement of the battery cells 20, the first surface 21b is formed in different ways. For example Figure 9 , Figure 10 As shown, after a plurality of battery cells 20 are arranged, a part of the outer surface of the housing 211 of each battery cell 20 is exposed so as to be visible, then a part of the outer surface of the housing 211 of all the battery cells 20 together forms the first surface 21b.

[0105] For example Figure 11 As shown, after a plurality of battery cells 20 are arranged, only a part of the outer surface of the housing 211 of some battery cells 20 is exposed so as to be visible, and the other part of the battery cells 20 is completely covered by a part of the battery cells 20 and cannot be seen entirely. The outer surface of the housing 211 of this part of the battery cells 20 does not participate in forming the first surface 21b.

[0106] In this embodiment, the outer surfaces of the end cap 212 and the structures (such as the electrode terminals 23, the liquid injection hole 26, the pressure relief mechanism 25, etc.) disposed on the end cap 212 do not participate in forming the first surface 21b.

[0107] In some other embodiments, the surface of the end cap 212 facing away from the inside of the battery cell 20 can participate in forming the first surface 21b. When a first adhesive layer 50 is provided between the surface of the end cap 212 facing away from the inside of the battery cell 20 and the box body 10, it is only necessary to make an avoidance arrangement for the structures (such as the electrode terminals 23, the liquid injection hole 26, the pressure relief mechanism 25, etc.) disposed on the end cap 212.

[0108] At least a part of the outer surface of the housing 211 of the battery cell 20 forms a first surface 21b together. It can be understood that at least a part of the outer surface of at least a part of the housing 211 of the battery cell 20 is bonded to the box body 10, making it more convenient to bond the battery pack 20b and the box body 10, and can avoid interference between the first adhesive layer 50 and the structures on the end cover 212 (such as the electrode terminal 23), which affects the bonding performance of the first adhesive layer 50 and / or affects the structures on the end cover 212 from playing their roles.

[0109] In some embodiments, the bonding strength P of the first adhesive layer 50 satisfies: P≥6Mpa.

[0110] The bonding strength refers to the adhesive force borne per unit bonding area. The bonding strength of the first adhesive layer 50 mainly includes the cohesive strength of the first adhesive layer 50 and the bonding strength between the first adhesive layer 50 and the bonded surfaces (the inner surface of the first surface 21b and the box body 10 or the surfaces of other structures inside the first surface 21b and the box body 10). The greater the bonding strength, the better the bonding stability, and the smaller the bonding strength, the weaker the bonding stability.

[0111] The bonding strength P of the first adhesive layer 50 can be 8Mpa, 10Mpa, 12Mpa, 15Mpa, 20Mpa, 25Mpa, 30Mpa, etc.

[0112] The bonding strength P of the first adhesive layer 50 satisfies: P≥6Mpa, so that the first adhesive layer 50 has a strong bonding ability, thereby improving the bonding stability between the battery pack 20b and the box body 10.

[0113] Further, P≥9MPa.

[0114] For example, the bonding strength P of the first adhesive layer 50 can be 9.5Mpa, 11.5Mpa, 12.5Mpa, 14Mpa, 23Mpa, 28Mpa, 32Mpa, 40Mpa, etc.

[0115] P≥9MPa enables the first adhesive layer 50 to have a strong bonding ability, thereby improving the bonding stability between the battery pack 20b and the box body 10.

[0116] Please continue to refer to Figure 6 、 Figure 7 In some embodiments, the thickness M of the first adhesive layer 50 satisfies: 0.1mm≤M≤6mm.

[0117] The thickness of the first adhesive layer 50 refers to the distance between the two bonded surfaces to which it is bonded. As Figure 6As shown, in an embodiment where the two surfaces bonded to the first adhesive layer 50 are the first surface 21b and the inner surface of the box body 10, the thickness of the first adhesive layer 50 is the straight-line distance between the first surface 21b and the inner surface of the box body 10 opposite thereto. As Figure 7 As shown, in an embodiment where the two surfaces bonded to the first adhesive layer 50 are the first surface 21b and the surface of other structures inside the box body 10, the thickness of the first adhesive layer 50 is the straight-line distance between the first surface 21b and the surface of other structures of the box body 10 opposite thereto. Figure 7 The case where the other structure is the heat dissipation structure 60 is shown, wherein the heat dissipation structure 60 is a water-cooled plate. That is, the thickness of the first adhesive layer 50 is the straight-line distance between the first surface 21b and the surface of the water-cooled plate facing the battery pack 20b.

[0118] The thickness M of the first adhesive layer 50 can be 0.2 mm, 0.3 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0119] 0.1 mm ≤ M ≤ 6 mm. When ensuring that the first adhesive layer 50 has a good connection strength between the battery pack 20b and the box body 10, the volume of the first adhesive layer 50 is small, so as to reduce the occupation of the accommodation space 11 of the box body 10 by the first adhesive layer 50, thereby leaving more space for the accommodation space 11 to accommodate the battery cells 20, which is beneficial to improving the energy density of the battery 100.

[0120] Optionally, 0.5 mm ≤ M ≤ 3 mm.

[0121] The thickness M of the first adhesive layer 50 can be 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 1.5 mm, 2.5 mm, 2.8 mm, etc.

[0122] 0.5 mm ≤ M ≤ 3 mm. In this case, the connection strength of the first adhesive layer 50 is better, ensuring a good connection strength between the battery pack 20b and the box body 10, making the volume of the first adhesive layer 50 small, so as to reduce the occupation of the accommodation space 11 of the box body 10 by the first adhesive layer 50, thereby leaving more space for the accommodation space 11 to accommodate the battery cells 20, which is beneficial to improving the energy density of the battery 100. In addition, 0.5 mm ≤ M ≤ 3 mm can also make the first adhesive layer 50 have a certain buffering performance between the battery pack 20b and the box body 10, reducing the risk of the battery cells 20 being damaged by impact.

[0123] In some embodiments, the weight of the first adhesive layer 50 is W1, and the weight of the battery 100 is W2, satisfying: 0.0001 ≤ W1 / W2 ≤ 0.001.

[0124] The weight of the battery 100 being W2 refers to the weight of the entire battery 100, which is the sum of the weights of the first adhesive layer 50, all battery cells 20, the box body 10, and other structures within the box body 10.

[0125] W1 / W2 refers to the proportion of the weight of the first adhesive layer 50 in the weight of the entire battery 100. For example, W1 / W2 can be 0.0002, 0.0003, 0.0004, 0.0005, 0.0006, 0.0007, 0.0008, 0.0009, etc.

[0126] 0.0001 ≤ W1 / W2 ≤ 0.001. While ensuring that the first adhesive layer 50 provides good connection strength between the battery pack 20b and the box body 10, it makes the proportion of the weight of the first adhesive layer 50 in the weight of the entire battery 100 relatively small, thereby reducing the occupation of the accommodation space 11 of the box body 10 by the first adhesive layer 50, and thus leaving more space for the accommodation space 11 to accommodate the battery cells 20, which is beneficial to improving the energy density of the battery 100.

[0127] In some embodiments, the weight of the first adhesive layer 50 is W1, and the sum of the weights of multiple battery cells 20 is W3, satisfying: 0.0004 ≤ W1 / W3 ≤ 0.002.

[0128] W1 / W3 refers to the ratio of the weight of the first adhesive layer 50 to the sum of the weights of all battery cells 20. W1 / W3 can be 0.0005, 0.0006, 0.0007, 0.0008, 0.0009, 0.001, 0.0013, 0.0015, 0.0017, 0.002, etc.

[0129] 0.0004 ≤ W1 / W3 ≤ 0.002. While ensuring that the amount of the first adhesive layer 50 is sufficient to stably bond the battery cells 20 to the box body 10, it minimizes the amount of the first adhesive layer 50 as much as possible, thereby reducing the occupation of the accommodation space 11 of the box body 10 by the first adhesive layer 50, and thus leaving more space for the accommodation space 11 to accommodate the battery cells 20, which is beneficial to improving the energy density of the battery 100.

[0130] As Figures 12 - 14 shown, in some embodiments, the battery 100 further includes a support member 70; the battery cell 20 includes a housing 21 and an electrode terminal 23, the housing 21 includes a first wall 213 for mounting the electrode terminal 23, along the thickness direction of the first wall 213, the box body 10 includes a second wall 14 opposite to the first wall 213, and the support member 70 is supported between the first wall 213 and the second wall 14.

[0131] In this embodiment, the first wall 213 of the outer shell 21 serves as the end cap 212 of the outer shell 21. The end cap 212 supported by the support member 70 is the portion not obstructed by other battery cells 20. The second wall 14 of the housing 10 is the wall opposite the end cap 212 not obstructed by other battery cells 20. Because the surface of the end cap 212 facing away from the interior of the battery cells 20 is not bonded to the first adhesive layer 50, the support member 70 supported on the end cap 212 avoids interference with the first adhesive layer 50, facilitating the placement of the first adhesive layer 50.

[0132] The second wall 14 is the first portion 12 ( Figure 2 ) or the second part 13 ( Figure 2 ).

[0133] The support member 70 is supported between the first wall 213 of the battery cell 20 and the second wall 14 of the box body 10 , thereby improving the stability of the battery cell 20 when installed in the box body 10 .

[0134] like Figure 12 、 Figure 13 、 Figure 14 As shown, the support member 70 includes a first supporting portion, a second supporting portion and a first connecting portion, the first connecting portion is attached to the second wall 14, and along a preset direction, the first supporting portion and the second supporting portion are spaced apart and connected to the first connecting portion, and one end of the first supporting portion facing away from the first connecting portion and one end of the second supporting portion facing away from the first connecting portion are respectively attached to the first walls 213 of two adjacent battery cells 20.

[0135] The first connection portion is attached to the second wall 14 , and the first connection portion and the second wall 14 may be connected, for example, by bonding, welding, etc.; or the first connection portion and the second wall 14 may only be in abutment contact.

[0136] The first supporting portion and the second supporting portion are connected to the first connecting portion at intervals along a preset direction, and one end of the first supporting portion and the other end of the second supporting portion facing away from the first connecting portion are respectively attached to the first walls 213 of two adjacent battery cells 20 along the preset direction.

[0137] The first support portion is attached to the first wall 213. The first support portion and the first wall 213 may be connected, for example, by bonding or welding, or the first support portion and the first wall 213 may only be in abutment contact. The second support portion is attached to the first wall 213. The second support portion and the first wall 213 may be connected, for example, by bonding or welding, or the second support portion and the first wall 213 may only be in abutment contact.

[0138] At least one of the first supporting portion, the second supporting portion and the first connecting portion may be a hollow structure or a solid structure. Figure 14As shown in the figure, the first supporting portion and the second supporting portion are hollow structures, and the first connecting portion is a solid structure, which can reduce the weight of the support member 70 and thus reduce the impact of the setting of the support member 70 on the overall weight of the battery 100.

[0139] The support member 70 can be attached to the first wall 213 of two adjacent battery cells 20 to improve the connection stability of the two adjacent battery cells 20 within the box 10. Moreover, one support member 70 can support two adjacent battery cells 20, so that fewer support members 70 can be used to support multiple battery cells 20, reducing the impact of the arrangement of the support member 70 on the energy density of the battery 100.

[0140] In other embodiments, Figure 15 As shown, the first walls 213 of two adjacent battery cells 20 are supported by two independent support members 70 , respectively.

[0141] like Figure 16 As shown, in some embodiments, the battery 100 further includes a second adhesive layer 80 , and the support member 70 is connected to the first wall 213 via the second adhesive layer 80 .

[0142] In an embodiment in which the support member 70 includes a first support portion, a second support portion and a first connecting portion, an end of the first support portion facing away from the first connecting portion and the first wall 213 are connected via a second adhesive layer 80, and an end of the first support portion facing away from the first connecting portion and the first wall 213 are connected via a second adhesive layer 80.

[0143] The second adhesive layer 80 can be formed by coating, and when the fluid second adhesive layer 80 solidifies, the support member 70 and the first wall 213 are connected. Before the second adhesive layer 80 is bonded between the support member 70 and the first wall 213, the second adhesive layer 80 can be a solid adhesive tape.

[0144] The support member 70 is connected to the first wall 213 through the second adhesive layer 80, which can maintain a stable supporting relationship between the support member 70 and the first wall 213, improve the ability to withstand external forces such as vibration and impact, and thus reduce the risk of failure of the support member 70 to support the battery cell 20.

[0145] An embodiment of the present application further provides an electric device, which includes the battery 100 provided in any of the above embodiments.

[0146] The present embodiment provides a battery 100 comprising a housing 10 and a plurality of prismatic batteries 100. The plurality of prismatic batteries 100 are arranged to form a battery pack 20b and housed within a housing space 11 of the housing 10. The volume of the housing space 11 is V, the number of prismatic batteries 100 is n, and the volume of the prismatic batteries 100 is V1, satisfying the condition 35% ≤ nV1 / V ≤ 95%. The first surface 21b of the battery pack 20b is bonded to the box body 10 through a first adhesive layer 50. The battery 100 also includes a support member 70, which includes a first supporting portion, a second supporting portion and a first connecting portion. The first supporting portion and the second supporting portion are connected to the first connecting portion at intervals along a preset direction. The first connecting portion is connected to the first wall 213 of the box body 10. An end of the first supporting portion facing away from the first connecting portion is bonded to the end cover 212 of one of the two adjacent square-shell batteries 100 along the preset direction through a second adhesive layer 80. An end of the second supporting portion facing away from the first connecting portion is bonded to the end cover 212 of the other of the two adjacent square-shell batteries 100 along the preset direction through the second adhesive layer 80.

[0147] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that, Comprising: A box body, with an accommodation space formed inside; Multiple battery cells, accommodated in the accommodation space, and the multiple battery cells are arranged to form a battery pack. The battery cell includes a housing and electrode terminals. The housing includes a first wall for mounting the electrode terminals. Along the thickness direction of the first wall, the box body includes a second wall opposite to the first wall; A first adhesive layer, and the battery pack is bonded to the box body through the first adhesive layer; A support member, supported between the first wall and the second wall; The volume of the accommodation space is V, the number of battery cells is n, and the volume of the battery cell is V1, satisfying 35% ≤ nV1 / V ≤ 95%.

2. The battery according to claim 1, characterized in that, 50% ≤ nV1 / V ≤ 80%.

3. The battery according to claim 1, characterized in that, The battery pack has a first surface for bonding with the box body. The area of the first surface is S, and the area of the first adhesive layer in contact with the first surface is S1, satisfying: S1 ≥ 0.4S.

4. The battery according to claim 3, characterized in that, S1 ≥ 0.6S.

5. The battery according to claim 3, characterized in that, The battery cell includes a shell, an end cap, and electrode terminals. The shell has an opening, and the end cap is used to seal the opening. The electrode terminals are arranged on the end cap; At least part of the outer surface of the shell of at least some of the battery cells jointly forms the first surface.

6. The battery according to any one of claims 1-5, characterized in that, The bonding strength P of the first adhesive layer satisfies: P ≥ 6 Mpa.

7. The battery according to claim 6, characterized in that, P ≥ 9 MPa.

8. The battery according to any one of claims 1-5, characterized in that, The thickness M of the first adhesive layer satisfies: 0.1 mm ≤ M ≤ 6 mm.

9. The battery according to claim 8, characterized in that, 0.5 mm ≤ M ≤ 3 mm.

10. The battery according to any one of claims 1-5, characterized in that, The weight of the first adhesive layer is W1, and the weight of the battery is W2, satisfying: 0.0001 ≤ W1 / W2 ≤ 0.

001.

11. The battery according to any one of claims 1-5, characterized in that, The weight of the first adhesive layer is W1, and the sum of the weights of the multiple battery cells is W3, satisfying: 0.0004 ≤ W1 / W3 ≤ 0.

002.

12. The battery according to any one of claims 1-5, characterized in that, The support member includes a first support portion, a second support portion, and a first connecting portion. The first connecting portion is attached to the second wall. Along a preset direction, the first support portion and the second support portion are spaced and connected to the first connecting portion. The ends of the first support portion and the second support portion facing away from the first connecting portion are respectively attached to the first walls of two adjacent battery cells.

13. The battery according to claim 12, characterized in that, The battery further includes a second adhesive layer, and the support member is connected to the first wall through the second adhesive layer.

14. An electrical device, characterized in that, Including the battery according to any one of claims 1 - 13.

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