Battery device and electric device

Abstract

The invention is applicable to the technical field of batteries, and provides a battery device and a power utilization device, and the battery device comprises a box body and a battery monomer array. The box body comprises two first inner walls which are opposite in the first direction, and the maximum distance between the two first inner walls in the first direction is a first size. The battery monomer array is arranged between the two first inner walls; the battery monomer array comprises battery monomers which are arranged in an array of M rows and N columns; in the battery monomer array, each row of battery monomers are arranged along a first direction, and each column of battery monomers are arranged along a second direction; the maximum size of the single battery along the first direction is a second size, the maximum size of the single battery along the second direction is a third size, and at least one end of the single battery along the second direction is provided with an electrode terminal. M > = 1, N > = 1, and M and N are positive integers; the third size is smaller than or equal to 400 mm, and the second size * N / first size belongs to [0.771, 0.947]. Thus, the battery device can give consideration to both high heat dissipation capability and high energy density.

Description

Technical Field

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

[0002] In the related art, a power battery may generally include a box body and a plurality of battery cells, and the battery cells are arranged in the box body.

[0003] In some cases, based on the arrangement of the battery cells in the box, the power battery can have a higher space utilization rate to have a higher energy density. However, this will inevitably lead to poor heat dissipation of the battery cells, so that the maximum temperature of the battery cells is very high, affecting the service life of the power battery. In other cases, by adjusting the arrangement of the battery cells in the box, the heat dissipation capacity of the power battery can be improved to reduce the maximum temperature of the battery cells and extend the service life of the power battery. However, this will inevitably reduce the space utilization rate of the power battery and reduce the energy density of the power battery. Therefore, it is difficult for the power battery to take into account both heat dissipation capacity and energy density. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide a battery device and an electrical device, which can improve the technical problem that it is difficult for power batteries to balance heat dissipation capacity and energy density.

[0005] In a first aspect, an embodiment of the present application provides a battery device, including:

[0006] The box body comprises two first inner walls arranged opposite to each other along a first direction, and the maximum distance between the two first inner walls along the first direction is a first dimension;

[0007] A battery cell array is provided between the two first inner walls; the battery cell array comprises battery cells arranged in an array of M rows and N columns; in the battery cell array, each row of battery cells is arranged along a first direction, and each column of battery cells is arranged along a second direction; the maximum dimension of the battery cell along the first direction is the second dimension, the maximum dimension of the battery cell along the second direction is the third dimension, and at least one end of the battery cell along the second direction is provided with an electrode terminal;

[0008] Wherein, M≥1, N≥1, M and N are both positive integers; the third dimension ≤400 mm, the second dimension*N / the first dimension∈[0.771, 0.947]; the first direction intersects the second direction.

[0009] The battery device provided by the embodiment of the present application includes a box body and a battery cell array arranged in the box body, wherein the battery cell array includes a plurality of battery cells arranged in an array of M rows and N columns, each row of battery cells is arranged along a first direction, and the maximum size of the battery cell along the first direction (second size)*the number of battery cells in each row (N) / the maximum size of the two first inner walls along the first direction (first size)∈[0.771, 0.947], that is, the sum of the maximum size of the battery cells in each row in the first direction / the maximum size of the two first inner walls in the first direction is within the range of [0.771, 0.947], so that the battery cells in each row have a more appropriate maximum size and number in the first direction, so that they can be arranged in the box body more compactly. In this way, on the one hand, the battery cells have a more appropriate maximum size in the first direction, so that the battery cells have a higher heat dissipation capacity, which is convenient for the battery cells to perform efficient heat dissipation, so that the maximum temperature of the battery cells can be within a more optimal range, which is conducive to extending the service life of the battery device. On the other hand, each row of battery cells has a relatively suitable number, so that the battery cells have a high grouping efficiency in the first direction, so that the battery cell array can fully utilize the internal space of the box in the first direction, which helps to improve the space utilization of the battery device and is conducive to improving the energy density of the battery device. Therefore, by adopting the above technical solution, the battery device can have a higher heat dissipation capacity and energy density, that is, the battery device can take into account the advantages of high heat dissipation capacity and high energy density.

[0010] In some embodiments, second size*N / first size∈[0.848, 0.947].

[0011] Such an arrangement enables the battery device to have a higher heat dissipation capability and energy density, thereby enabling the battery device to have the advantages of both high heat dissipation capability and high energy density.

[0012] In some embodiments, the third dimension is ≥ 200 mm.

[0013] By adopting the above technical solution, the maximum dimension (i.e., the third dimension) of the battery cell in the second direction has a certain range of values. In this way, on the one hand, the battery cell can have a flow path of a more appropriate length, which can improve the problem of the battery cell generating a very large amount of heat due to the excessively large flow path, so that the heat generated by the battery cell is within a more optimal range, thereby making the maximum temperature of the battery cell within a more optimal range, which is conducive to extending the service life of the battery device. On the other hand, when the maximum dimensions of the two first inner walls along the first direction are predetermined, it is convenient to reduce the number of battery cells in each column, that is, to reduce the value of M, so that the battery cells in each column have a more appropriate grouping efficiency in the second direction, so that the battery cell array can fully utilize the internal space of the box in the second direction, which helps to improve the space utilization of the battery device and is conducive to improving the energy density of the battery device.

[0014] In some embodiments, N≥40.

[0015] By setting N≥40, when the maximum dimensions of the two first inner walls along the first direction are predetermined, the maximum dimension of the battery cell in the first direction will not be too large, so that the battery cell has lower heat generation and higher heat dissipation capacity, which is conducive to extending the service life of the battery device.

[0016] In some embodiments, N≤150.

[0017] In this way, on the one hand, the battery cells can have lower heat generation and higher heat dissipation capacity, which is conducive to extending the service life of the battery device. On the other hand, the grouping efficiency of each row of battery cells in the first direction can be improved, so that the battery cell array can fully utilize the internal space of the box in the first direction, which helps to improve the space utilization of the battery device and improve the energy density of the battery device. Such a setting is conducive to the battery device taking into account the advantages of high heat dissipation capacity and high energy density.

[0018] In some embodiments, the battery device has a length direction and a width direction, and the length of the battery device is greater than the width of the battery device; the second direction is the length direction of the battery device or the width direction of the battery device.

[0019] By adopting the above technical solution, the battery cell array can be arranged in the box according to needs, which can improve the flexibility and convenience of arranging the battery cell array in the box.

[0020] In some embodiments, the second direction is the walking direction of the electric device having the battery device; or, the first direction is the walking direction of the electric device having the battery device.

[0021] By adopting the above technical solution, the battery cell array can be arranged in the box according to needs, which can improve the flexibility and convenience of arranging the battery device on the power-consuming device.

[0022] In some embodiments, the battery cell has first surfaces on two opposite sides along the first direction, and second surfaces on two opposite ends along the second direction, the electrode terminal extends from the second surface, and the area of ​​the first surface is larger than that of the second surface.

[0023] By making the area of ​​the first surface larger than the area of ​​the second surface, the maximum dimension of the monomer body along the first direction is smaller than the maximum dimension of the monomer body along the second direction, and the maximum dimension of the battery cell along the first direction is smaller than the maximum dimension of the battery cell along the second direction (i.e., the third dimension), that is, the length of the battery cell is larger than the thickness of the battery cell. With such an arrangement, the battery cell can have a better heat dissipation capacity, so as to reduce the maximum temperature of the battery cell and help extend the service life of the battery device.

[0024] In some embodiments, the second size ∈ [10 mm, 45 mm].

[0025] Such arrangement enables the battery cell to have a smaller size along the first direction. In this way, on the one hand, the battery cell can have a higher heat dissipation capacity, which is convenient for the battery cell to dissipate heat efficiently, which helps to reduce the temperature of the battery cell, so that the maximum temperature of the battery cell can be within a better range, which is conducive to extending the service life of the battery device. On the other hand, when the maximum size of the two first inner walls along the first direction is predetermined, each row of battery cells has a more appropriate number of battery cells, that is, the value of N is more appropriate, so that each row of battery cells has a higher grouping efficiency in the first direction, for example, it can be but not limited to saving parts between adjacent battery cells along the first direction, and can reduce the space waste problem caused by the arrangement tolerance between adjacent battery cells, so that the battery cell array can fully utilize the internal space of the box in the first direction, which is helpful to improve the space utilization of the battery device and the energy density of the battery device. Therefore, by adopting the above technical solution, the battery device can have a higher heat dissipation capacity and energy density, that is, the battery device can take into account the advantages of high heat dissipation capacity and high energy density.

[0026] In some embodiments, the second size ∈ [15 mm, 30 mm].

[0027] By adopting the above technical solution, the battery cells have a smaller size along the first direction. In this way, on the one hand, the battery cells can have a higher heat dissipation capacity, so that the maximum temperature of the battery cells can be within a more optimal range. On the other hand, when the maximum size of the two first inner walls along the first direction is predetermined, each row of battery cells has a more appropriate number of battery cells, that is, the value of N is more appropriate, so that each row of battery cells has a higher grouping efficiency in the first direction, so that the battery cell array can fully utilize the internal space of the box in the first direction, which helps to improve the space utilization of the battery device and is conducive to improving the energy density of the battery device. Therefore, by adopting the above technical solution, it helps the battery device to have a higher heat dissipation capacity and energy density.

[0028] In some embodiments, the battery cell has third surfaces at two opposite ends along a third direction, the area of ​​the first surface is greater than the area of ​​the third surface, and the third direction intersects the first direction and the second direction respectively.

[0029] By making the area of ​​the first surface larger than the area of ​​the third surface, the maximum dimension of the battery body along the third direction is larger than the maximum dimension of the battery body along the first direction, that is, the fourth dimension mentioned below is larger than the second dimension, that is, the width of the battery cell is larger than the thickness of the battery cell. In this way, the battery cell can have a better heat dissipation capacity to reduce the maximum temperature of the battery cell.

[0030] In some embodiments, the maximum dimension of the battery cell along the third direction is a fourth dimension, and the fourth dimension ∈ [60 mm, 160 mm].

[0031] By adopting the above technical solution, the battery cell has a more suitable maximum size in the third direction, which helps to make the battery cell have better heat dissipation capacity to reduce the maximum temperature of the battery cell.

[0032] In some embodiments, the fourth dimension ∈ [80 mm, 130 mm].

[0033] By adopting the above technical solution, the battery cell has a more suitable maximum size in the third direction, which helps to make the battery cell have better heat dissipation capacity to reduce the maximum temperature of the battery cell.

[0034] In some embodiments, the box body includes two first walls arranged opposite to each other along a first direction, the first inner wall is the inner wall of the first wall, the outer wall of the first wall is the first outer wall, the maximum distance between the first outer walls of the two first walls along the first direction is the fifth dimension, and the second dimension*N / fifth dimension∈[0.744, 0.918].

[0035] By adopting the above technical solution, the battery cells have a more suitable maximum size along the first direction, and each row of battery cells has a more suitable number of battery cells, so that the battery device has high heat dissipation capacity and high energy density.

[0036] In some embodiments, second size*N / fifth size∈[0.82, 0.918].

[0037] By adopting the above technical solution, the battery cells have a more suitable maximum size along the first direction, and each row of battery cells has a more suitable number of battery cells, so that the maximum temperature and energy density of the battery device are both within a more optimal range.

[0038] In some embodiments, both opposite ends of the battery cell in the second direction include at least one group of electrode terminals, and one group of electrode terminals includes positive electrode terminals and negative electrode terminals spaced apart along a third direction; the third direction intersects the first direction and the second direction respectively.

[0039] By providing at least one set of electrode terminals with different polarities at each end of the battery cell along the second direction, the average current path of the battery cell can be effectively shortened, thereby reducing the internal resistance of the battery cell and reducing the heat generated by the battery cell, thereby reducing the maximum temperature of the battery cell and improving the performance and reliability of the battery device.

[0040] In some embodiments, at least one end of the battery cell along the second direction includes a pressure relief mechanism spaced apart from the electrode terminal.

[0041] By arranging the pressure relief mechanism at at least one end of the battery cell along the second direction, the internal space of the box can be effectively saved, so as to help improve the space utilization and energy density of the battery device. In addition, it is also convenient to arrange thermal management components at the opposite ends of the battery cell array along the third direction, and on this basis, the pressure relief mechanism can effectively achieve the pressure relief effect of the battery cell.

[0042] In some embodiments, N≥2, and in each row of battery cells, insulating glue is provided between two adjacent battery cells;

[0043] And / or, M≥2, and in each column of battery cells, insulating glue is provided between two adjacent battery cells.

[0044] By providing insulating glue between two adjacent battery cells, on the one hand, the insulation effect between the two adjacent battery cells can be achieved, reducing the adverse effects between the two adjacent battery cells, so that the battery device can fully exert its performance. On the other hand, the two adjacent battery cells can be fixed by the insulating glue, which makes the fixing method of the battery cell array very simple, facilitates the assembly of the battery device, and can improve the production efficiency of the battery device. In addition, the insulating glue can achieve a protective effect during the thermal runaway of the battery cell and improve the high-voltage ignition problem caused by the particles ejected by the battery cell.

[0045] In some embodiments, a pressure relief mechanism is provided on the battery cell and is spaced apart from the electrode terminal. At least a portion of the insulating glue is provided on the electrode terminal and avoids the pressure relief mechanism.

[0046] By at least partially setting the insulating glue on the electrode terminal, the insulating glue can achieve insulation and fixation effects between two adjacent battery cells. In addition, the insulating glue avoids the pressure relief mechanism, which facilitates the pressure relief mechanism to achieve a pressure relief effect.

[0047] In some embodiments, the pressure relief mechanism and the electrode terminal are spaced apart along a third direction, and in the third direction, the insulating glue exceeds the electrode terminal and is spaced apart from the pressure relief mechanism; the third direction intersects with the first direction and the second direction respectively.

[0048] Such a configuration makes it easy for the insulating glue to be arranged on the electrode terminal and avoid the pressure relief mechanism, so that the insulating glue can achieve the functions of insulation protection, fixation, thermal runaway protection, etc., and can ensure the function of the pressure relief mechanism to a certain extent.

[0049] In some embodiments, N≥2, and in each row of battery cells, a partition component is provided between two adjacent battery cells;

[0050] And / or, M≥2, and in each column of battery cells, a partition component is provided between two adjacent battery cells.

[0051] Two adjacent battery cells can be separated by a separator. On the one hand, the separator can separate the high voltage between the two adjacent battery cells, which can reduce the adverse effects between the two adjacent battery cells, so that the battery device can give full play to its performance. On the other hand, it can improve the overall strength of the battery cell array, reduce the adverse effects of external factors such as vibration on the battery cell array, and effectively enhance the adaptability of the battery device.

[0052] In some embodiments, the housing further includes a thermal management component disposed at at least one end of the battery cell array along a third direction, the thermal management component being connected to the battery cell to adjust the temperature of the battery cell, and the third direction intersects the first direction and the second direction respectively.

[0053] By providing a thermal management component at at least one end of the battery cell array along the third direction, the thermal management component at at least one end of the battery cell array along the third direction can perform thermal management on the battery cell array.

[0054] In a second aspect, an embodiment of the present application provides an electrical device, including a battery device.

[0055] The electrical device provided in the embodiment of the present application adopts the battery device involved above, so that the battery device can take into account the advantages of high heat dissipation capacity and high energy density, thereby improving the performance and reliability of the battery device, which helps to improve the performance and reliability of the electrical device.

[0056] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0058] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application;

[0059] Figure 2 An exploded view of a battery device provided for some embodiments of the present application;

[0060] Figure 3 Schematic diagram of a battery device provided in some other embodiments of the present application;

[0061] Figure 4 for Figure 3 An exploded view of the battery unit provided;

[0062] Figure 5 A three-dimensional structural diagram of a battery cell of a battery device provided in some embodiments of the present application;

[0063] Figure 6 for Figure 3 A partial schematic diagram of a box of a battery device is provided;

[0064] Figure 7 for Figure 3 A partial schematic diagram of a battery device is provided;

[0065] Figure 8 for Figure 7 The enlarged view of point A in the middle;

[0066] Fig. 9 for Figure 3 Sectional view along BB;

[0067] Fig.10 for Fig. 9 A partial enlarged view of

[0068] Fig.11 A partial schematic diagram of a battery device provided in some other embodiments of the present application;

[0069] Fig.12 for Figure 3 A three-dimensional structural diagram of a battery cell array of a battery device is provided.

[0070] Among them, the reference numerals in the figure are:

[0071] 3000-vehicle; 3100-controller; 3200-motor; 10-battery device; 1-battery cell array; 101-first surface; 102-second surface; 103-third surface; 11-battery cell; 111-electrode terminal; 111a-positive electrode terminal; 111b-negative electrode terminal; 112-cell body; 1121-housing; 11211-housing; 11212-end cover; 113-pressure relief mechanism; 2-box; 2 1-first part; 22-second part; 211-first wall; 2111-first inner wall; 2112-first outer wall; 212-thermal management component; 2121-second inner wall; 213-partition component; 3-collecting component; L1-first dimension; L2-second dimension; L3-third dimension; L4-fourth dimension; L5-fifth dimension; a-length direction; b-width direction; c-travel direction; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0072] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0073] Unless otherwise specified, all implementations and optional implementations of the embodiments of the present application can be combined with each other to form a new technical solution.

[0074] Unless otherwise specified, all technical features and optional technical features of the embodiments of the present application can be combined with each other to form a new technical solution.

[0075] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0077] In the description of the embodiments of the present application, "multiple" means more than two, and unless otherwise clearly and specifically defined, "more than two" includes two. Accordingly, "multiple groups" means more than two groups, including two groups.

[0078] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0079] In the description of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0080] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "adjacent" and "adjacent" refer to proximity in position. For example, among the three components A1, A2 and B, the distance between A1 and B is greater than the distance between A2 and B. Then A2 is closer to B than A1, that is, A2 is adjacent to B. It can also be said that B is adjacent to A2. In other words, A2 is adjacent to B. For another example, when there are multiple C components, the multiple C components are C1, C2...CN, and when one of the C components, such as C2, is closer to the B component than the other C components, then B is adjacent to C2. It can also be said that C2 is adjacent to B. In other words, C2 is adjacent to B.

[0081] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0082] From the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0083] A power battery generally may include a housing and a plurality of battery cells, and the battery cells are arranged in the housing.

[0084] In some cases, based on the arrangement of the battery cells in the box, the power battery can have a higher space utilization rate to have a higher energy density. However, this will inevitably lead to poor heat dissipation of the battery cells, so that the maximum temperature of the battery cells is very high, affecting the service life of the power battery. In other cases, by adjusting the arrangement of the battery cells in the box, the heat dissipation capacity of the power battery can be improved to reduce the maximum temperature of the battery cells and extend the service life of the power battery. However, this will inevitably reduce the space utilization rate of the power battery and reduce the energy density of the power battery. Therefore, it is difficult for the power battery to take into account both heat dissipation capacity and energy density.

[0085] For example, by reducing the number of battery cells in a power battery, the grouping efficiency of the battery cells can be improved, which can save the arrangement of components between adjacent battery cells and improve the problem of space waste caused by the arrangement tolerance between adjacent battery cells, thereby improving the space utilization of the power battery and improving the energy density of the power battery. However, this makes the volume of the battery cell very large, which inevitably affects the heat dissipation capacity of the battery cell, making the maximum temperature of the battery cell very high, affecting the service life of the power battery.

[0086] For example, by reducing the volume of battery cells, the heat dissipation capacity of battery cells can be improved, which can reduce the maximum temperature of battery cells. However, this requires increasing the number of battery cells and adaptively arranging adjacent battery cells, which inevitably reduces the grouping efficiency of battery cells, reduces the space utilization of power batteries, and thus reduces the energy density of power batteries.

[0087] Based on the above considerations, the embodiment of the present application provides a battery device and an electrical device, wherein the battery device includes a box body and a battery cell array disposed in the box body, wherein the battery cell array includes a plurality of battery cells arranged in an array of M rows and N columns, wherein each row of battery cells is arranged along a first direction, and the maximum size (second size) of the battery cell along the first direction*the number of battery cells in each row (N) / the maximum size (first size) of the two first inner walls along the first direction ∈ [0.771, 0.947], that is, the sum of the maximum size of the battery cells in each row in the first direction / the maximum size of the two first inner walls in the first direction is within the interval of [0.771, 0.947], so that the battery cells in each row have a more appropriate maximum size and number in the first direction, so that they can be arranged in the box body more compactly. In this way, on the one hand, the battery cells have a more appropriate maximum size in the first direction, so that the battery cells have a higher heat dissipation capacity, which is convenient for the battery cells to dissipate heat efficiently, so that the maximum temperature of the battery cells can be within a more optimal range, which is conducive to extending the service life of the battery device. On the other hand, each row of battery cells has a relatively suitable number, so that the battery cells have a high grouping efficiency in the first direction, so that the battery cell array can fully utilize the internal space of the box in the first direction, which helps to improve the space utilization of the battery device and is conducive to improving the energy density of the battery device. Therefore, by adopting the above technical solution, the battery device can have a higher heat dissipation capacity and energy density, that is, the battery device can take into account the advantages of high heat dissipation capacity and high energy density.

[0088] It should be noted that although the battery device provided in the embodiment of the present application is developed based on the problem that it is difficult to balance the heat dissipation capacity and energy density of power batteries, its application scenarios are not limited to power batteries. It can be understood that the battery device can be a power battery or an energy storage battery.

[0089] The battery device involved in the embodiment of the present application may be a single physical module including one or more battery cells, which is used to provide voltage and capacity. Wherein, when there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component, and the hybrid connection means that the multiple battery cells are connected in both series and parallel.

[0090] In some embodiments, the battery device may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. As an example, the multiple battery cells may be fixed by cable ties or the like to form a battery module. As an example, the multiple battery cells may also be fixed by end plates, side plates, or the like to form a battery module.

[0091] In some embodiments, the battery device may be a battery pack, which may include a housing and a battery cell. As an example, the battery cell may be directly accommodated in the housing. As an example, a plurality of battery cells may also be first formed into one or more battery modules and then accommodated in the housing.

[0092] A battery cell is the smallest unit used to store and output electrical energy. A battery cell can be a secondary battery or a primary battery. A secondary battery is a battery cell that can be used again by recharging the active material after the battery cell is discharged.

[0093] The battery cell may be cylindrical, flat, rectangular or other shapes, etc. The battery cell may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc.

[0094] The battery device involved in the embodiments of the present application may be an energy storage device, such as an energy storage container or an energy storage cabinet.

[0095] The battery device provided in the embodiment of the present application can also be used in an electrical device that uses the battery device as a power source.

[0096] Electric devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, vehicles, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. According to the power source, vehicles may be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. According to the drive mode, vehicles may be front-wheel drive vehicles, rear-wheel drive vehicles, or four-wheel drive vehicles.

[0097] For ease of description, the embodiments of the present application are described using an electrical device as a vehicle as an example.

[0098] In some embodiments, see Figure 1 , Figure 1 A schematic diagram of a vehicle 3000 provided for some embodiments of the present application. A battery device 10 is provided inside the vehicle 3000, and the battery device 10 can be provided at the bottom, head, or tail of the vehicle 3000. The battery device 10 can be used to power the vehicle 3000, for example, the battery device 10 can be used as an operating power source for the vehicle 3000. The vehicle 3000 may also include a controller 3100 and a motor 3200, and the controller 3100 is used to control the battery device 10 to power the motor 3200, for example, for the starting, navigation, and working power requirements of the vehicle 3000 during driving.

[0099] In some embodiments, the battery device 10 can not only serve as an operating power source for the vehicle 3000 , but also serve as a driving power source for the vehicle 3000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 3000 .

[0100] In some embodiments, please refer to Figures 2 to 4 , Figure 2 An exploded view of a battery device 10 provided in some embodiments of the present application, Figure 3 Schematic diagram of a battery device 10 provided in some other embodiments of the present application, Figure 4 for Figure 3 An exploded view of a battery device 10 is provided. The battery device 10 may include a housing 2 and a battery cell 11. The housing 2 is a structure having a space inside, and the space inside the housing 2 is used to accommodate the battery cell 11.

[0101] The box body 2 can adopt a variety of structures. In some embodiments, the box body 2 can include a first part 21 and a second part 22, which cover each other and together define the internal space of the box body 2, and the internal space of the box body 2 is a closed space. The closed here means covered or closed, which can be sealed or unsealed. That is, the box body 2 can be a sealed structure or an unsealed structure.

[0102] Among them, see Figure 2 The first part 21 and the second part 22 can both be hollow structures with an opening at one end, and the opening side of the first part 21 covers the opening side of the second part 22, so that the first part 21 and the second part 22 jointly define the internal space of the box body 2. Or, as Figure 3 and Figure 4 As shown, the first part 21 can be a hollow structure with an opening at one end, and the second part 22 is a plate-like structure, and the second part 22 covers the open side of the first part 21, so that the first part 21 and the second part 22 together define the internal space of the box body 2. The box body 2 composed of the first part 21 and the second part 22 can be in various shapes, such as a cylinder, a cuboid, etc.

[0103] In some embodiments, multiple battery cells 11 can be connected in series, in parallel or in a mixed connection to form a whole, and then the whole formed by the multiple battery cells 11 is directly accommodated in the internal space of the box body 2. In other embodiments, multiple battery cells 11 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form a battery module, and the battery module is accommodated in the internal space of the box body 2. In some other embodiments, multiple battery cells 11 can also be connected in series, in parallel or in a mixed connection first, and arranged and fixed to form multiple battery modules, and the multiple battery modules are then connected in series, in parallel or in a mixed connection to form a whole, and accommodated in the internal space of the box body 2.

[0104] In some embodiments, please combine Figure 1 , Figure 2 and Figure 4 The box 2 of the battery device 10 can be used as a part of the chassis structure of the vehicle 3000. For example, part of the box 2 can become at least a part of the floor of the vehicle 3000, or part of the box 2 can become at least a part of the cross beam and longitudinal beam of the vehicle 3000.

[0105] In some embodiments, see Figure 5 , and combined with other drawings. Among them, Figure 5 The three-dimensional structure diagram of the battery cell 11 of the battery device 10 provided in some embodiments of the present application. The battery cell 11 provided in the embodiments of the present application may include an electrode assembly and a housing 1121.

[0106] The electrode assembly is a component in the battery cell 11 where electrochemical reactions occur. Among them, the electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a lug. The lug of the positive electrode sheet is the positive electrode lug, and the lug of the negative electrode sheet is the negative electrode lug. The positive electrode lug and the negative electrode lug can be located together at one end of the main body; or, the positive electrode lug and the negative electrode lug can also be located at opposite ends of the main body.

[0107] In the battery cell 11 , the number of electrode assemblies may be one or more.

[0108] In some cases, the electrode assembly may also be referred to as a bare cell, a wound body, a stacked body, etc.

[0109] In some embodiments, the battery cell 11 may further include an electrolyte, which plays a role in conducting ions between the positive electrode plate and the negative electrode plate. The electrolyte involved in the embodiments of the present application may be liquid, gel or solid.

[0110] The outer shell 1121 is used to define the internal environment of the battery cell 11 , and the outer shell 1121 is used to accommodate the electrode assembly and the electrolyte.

[0111] In some embodiments, see Figure 5 , and in combination with other drawings. The housing 1121 may include a shell 11211 and an end cap 11212, the shell 11211 and the end cap 11212 are components for jointly defining the internal environment of the battery cell 11, and the internal environment defined by the shell 11211 and the end cap 11212 is used to accommodate the electrode assembly and the electrolyte. Among them, the shell 11211 and the end cap 11212 may be independent components. Specifically, the shell 11211 has an opening, and the end cap 11212 is covered at the opening of the shell 11211 to jointly define the internal environment of the battery cell 11 with the shell 11211, and to isolate the internal environment of the battery cell 11 from the external environment. Alternatively, the shell 11211 and the end cap 11212 may be an integrated structure. Specifically, a common connection surface may be formed between the end cap 11212 and the shell 11211 before the electrode assembly is placed in the shell. After the electrode assembly is placed in the shell, if the electrode assembly needs to be packaged, the end cap 11212 covers the shell 11211.

[0112] Among them, the shell 1121 can be a sealed structure or a non-sealed structure. As an example, when the shell 1121 is a sealed structure, the shell 1121 can protect the electrode assembly and prevent electrolyte leakage to a certain extent. As an example, when the shell 1121 is a non-sealed structure, the shell 1121 can protect the electrode assembly, and a sealed bag may be included between the shell 1121 and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag can be a bag-shaped insulating structure, an aluminum-plastic film, etc.

[0113] The number of end caps 11212 may be one. Figure 5 As shown, the number of the end covers 11212 may also be two, and the two end covers 11212 are respectively disposed at opposite ends of the shell 11211 .

[0114] The shell 11211 may be cylindrical, square, or other shapes, which may be determined according to the specific shape and size of the electrode assembly. In addition, the shell 11211 and the end cap 11212 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, or the like.

[0115] In some embodiments, see Figure 5 , and in combination with other drawings. The battery cell 11 may also include an electrode terminal 111. The electrode terminal 111 refers to a component with conductive properties, and the electrode terminal 111 serves as a current transmission end of the battery cell 11 for transmitting current. Among them, the electrode terminal 111 may be, but is not limited to, a pole.

[0116] The electrode terminal 111 is conductively connected to the electrode assembly. Specifically, the electrode terminal 111 is conductively connected to the pole tab of the electrode assembly. The electrode terminal 111 can be directly conductively connected to the pole tab by welding, bonding, etc. Alternatively, a transfer structure can also be provided between the electrode terminal 111 and the pole tab, and the transfer structure realizes the transfer between the electrode terminal 111 and the pole tab so as to enable current flow, thereby indirectly realizing the conductive connection between the electrode terminal 111 and the pole tab. The transfer structure refers to a metal structure with conductive properties, such as but not limited to a copper busbar.

[0117] In some embodiments, see Figure 5 , and in combination with other drawings. The electrode terminals 111 are provided with at least two, and the at least two electrode terminals 111 may include a positive electrode terminal 111a and a negative electrode terminal 111b, the positive electrode terminal 111a is conductively connected to the positive electrode tab of the electrode assembly, and the negative electrode terminal 111b is conductively connected to the negative electrode tab of the electrode assembly.

[0118] In some embodiments, see Figure 5, and in combination with other drawings. The electrode terminal 111 is disposed on the housing 1121. Specifically, the electrode terminal 111 can be disposed on the shell 11211 of the housing 1121, or on the end cover 11212 of the housing 1121. Among them, the positive electrode terminal 111a and the negative electrode terminal 111b can be disposed on the housing 11211 at the same time. Or, as Figure 5 As shown, the positive electrode terminal 111a and the negative electrode terminal 111b are both disposed on the end cover 11212. Alternatively, the housing 11211 and the end cover 11212 are both provided with electrode terminals 111.

[0119] The positive electrode terminal 111 a and the negative electrode terminal 111 b may be disposed at the same end of the shell 1121 , and the positive electrode terminal 111 a and the negative electrode terminal 111 b may also be disposed at opposite ends of the shell 1121 .

[0120] Please also read Figure 4 , Figures 6 to 10 , and combined with other drawings. Among them, Figure 6 for Figure 3 The provided partial schematic diagram of the box body 2 of the battery device 10 is specifically a partial schematic diagram of the box body 2 from the perspective of the third direction Z. Figure 7 for Figure 3 The partial schematic diagram of the battery device 10 provided is specifically a partial schematic diagram of the battery device 10 from the perspective of the third direction Z. Figure 8 for Figure 7 The enlarged view of point A in the middle. Fig. 9 for Figure 3 Cross-sectional view along BB, Fig.10 for Fig. 9 A partial enlarged view. The battery device 10 provided in the embodiment of the present application includes a box body 2 and a battery cell array 1. The box body 2 includes two first inner walls 2111, the two first inner walls 2111 are arranged opposite to each other along the first direction X, and the maximum distance between the two first inner walls 2111 along the first direction X is a first dimension L1. The battery cell array 1 is arranged between the two first inner walls 2111. The battery cell array 1 includes a plurality of battery cells 11, and the plurality of battery cells 11 are arranged in an array of M rows and N columns. In the battery cell array 1, each row of battery cells 11 is arranged along the first direction X, and each column of battery cells 11 is arranged along the second direction Y. The maximum dimension of the battery cell 11 along the first direction X is the second dimension L2, the maximum dimension of the battery cell 11 along the second direction Y is the third dimension L3, and at least one end of the battery cell 11 along the second direction Y is provided with an electrode terminal 111. Wherein, M≥1, N≥1, and M and N are both positive integers. The third dimension L3≤400 mm, the second dimension L2*N / the first dimension L1∈[0.771, 0.947], wherein the first direction X and the second direction Y intersect.

[0121] The first inner wall 2111 refers to the inner wall surface of the inner space of the box body 2. The first part 21 of the box body 2 may be provided with the first inner wall 2111, and the second part 22 of the box body 2 may also be provided with the first inner wall 2111. As an example, Figure 2 As shown, the first part 21 and the second part 22 of the box body 2 are both provided with a first inner wall 2111. As another example, Figure 4 and Figure 6 As shown, the first inner wall 2111 is disposed on the first portion 21 of the box body 2 .

[0122] It can be understood that the battery cell array 1 is disposed in the box body 2 and is located between the two first inner walls 2111 .

[0123] It can be understood that the battery cell array 1 includes M*N battery cells 11, the M*N battery cells 11 include M rows of battery cells 11 and N columns of battery cells 11, and the M*N battery cells 11 are arranged in an array in the box 2 and located between the two first inner walls 2111. Based on this, the battery cell array 1 refers to an array formed by M*N battery cells 11 arranged in M ​​rows and N columns.

[0124] In the battery cell array 1, each column of battery cells 11 includes M battery cells 11, and each row of battery cells 11 includes N battery cells 11. M may be 1 or greater than 1, for example, 2, 3, 4, 5, 6, 7, 8, 9, etc. N may be 1 or greater than 1, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, etc. As an example, Figure 7 As shown, M is 3, and N is greater than 3. In addition, the battery cell array 1 can also be a one-row-one-column structure, that is, M and N are both 1; it can also be a two-row-one-column structure, that is, M is 2, N is 1; it can also be a one-row-two-column structure, that is, M is 1, N is 2; it can also be a two-row-two-column structure, that is, M and N are both 2.

[0125] In the battery cell array 1, each row of battery cells 11 is arranged along the first direction X, which means that when N is greater than 1, the N battery cells 11 in each column are sequentially distributed along the first direction X. In the battery cell array 1, each column of battery cells 11 is arranged along the second direction Y, which means that when M is greater than 1, the M battery cells 11 in each row are sequentially distributed along the second direction Y.

[0126] Based on the fact that at least one end of the battery cell 11 along the second direction Y is provided with an electrode terminal 111: It can be understood that at least one end of the battery cell 11 along the second direction Y is provided with an electrode terminal 111; or Figure 5 As shown, the two opposite ends of the battery cell 11 along the second direction Y are both provided with electrode terminals 111 .

[0127] It can be understood that the battery cell 11 may include a cell body 112 and an electrode terminal 111, and the number of the electrode terminal 111 is multiple. The multiple electrode terminals 111 may be disposed at one end of the cell body 112 along the second direction Y; or Figure 5 As shown, a plurality of electrode terminals 111 may also be respectively arranged at opposite ends of the monomer body 112 along the second direction Y, that is, the opposite ends of the monomer body 112 along the second direction Y are provided with electrode terminals 111. The monomer body 112 is the main part of the battery monomer 11, and the monomer body 112 includes a shell 1121, an electrode assembly arranged in the shell 1121, an electrolyte arranged in the shell 1121, etc. It should be noted that the maximum size of the battery monomer 11 along the first direction X refers to the maximum size of the monomer body 112 along the first direction X, that is, the maximum size of the shell 1121 along the first direction X, which is the second size L2. The maximum size of the battery monomer 11 along the second direction Y refers to the maximum size of the whole body composed of the monomer body 112 and the electrode terminal 111 in the second direction Y, that is, when the monomer body 112 is provided with electrode terminals 111 at opposite ends of the battery monomer 11 along the second direction Y, the maximum size between the electrode terminals 111 at opposite ends of the monomer body 112 along the second direction Y is the third size L3.

[0128] It should be noted that, based on the arrangement of the electrode terminal 111 at one end of the battery cell 11 along the second direction Y, when the maximum size of the internal space of the box body 2 along the second direction Y is predetermined, the size of the battery cell body 112 of each column of battery cells 11 in the second direction Y can be made very large, that is, the box body 2 can be arranged with a very large size of the battery cell body 112 along the second direction Y, which helps to improve the energy density of the battery device 10. Based on the arrangement of the electrode terminals 111 at both opposite ends of the battery cell 11 along the second direction Y, it is beneficial for the battery cell 11 to achieve overcurrent.

[0129] The third size L3≤400mm, and can be specifically 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, etc.

[0130] The second size L2*N / first size L1∈[0.771, 0.947] means that 0.771≤second size L2*N / first size L1≤0.947, and the specific value of the second size L2*N / first size L1 can be 0.771, 0.78, 0.79, 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.92, 0.93, 0.94, 0.947, etc.

[0131] The first direction X refers to the arrangement direction of each row of battery cells 11. The second direction Y refers to the approximate distribution direction of the battery body 112 and the electrode terminal 111, that is, the arrangement direction of each column of battery cells 11. In some cases, the second direction Y may be the length extension direction of the battery cell 11.

[0132] The first direction X intersects with the second direction Y, which means that the first direction X and the second direction Y may form an angle greater than 0° and less than 180°, that is, the first direction X and the second direction Y are not parallel. The first direction X and the second direction Y may be perpendicular to each other or not perpendicular to each other. The first direction X and the second direction Y may be directions intersecting on the same plane or on planes that are not parallel to each other, and the projection of the second direction Y on the plane where the first direction X is located may intersect with the first direction X. As an example, the first direction X and the second direction Y are perpendicular.

[0133] The battery device 10 provided in the embodiment of the present application includes a box body 2 and a battery cell array 1 disposed in the box body 2. The battery cell array 1 includes a plurality of battery cells 11 arranged in an array of M rows and N columns. The battery cells 11 in each row are arranged along a first direction X, and the maximum size of the battery cells 11 along the first direction X (i.e., the second size L2)*the number of battery cells 11 in each row (i.e., N) / the maximum size of the two first inner walls 2111 along the first direction X (i.e., the first size L1)∈[0.771, 0.947], that is, the number of battery cells 11 in each row is The sum of the maximum dimensions of the battery cells 11 in the first direction X / the maximum dimensions of the two first inner walls 2111 in the first direction X is in the range of [0.771, 0.947], so that when the maximum dimensions of the two first inner walls 2111 along the first direction X are predetermined, each row of battery cells 11 has a more appropriate number of battery cells 11, that is, the value of N is more appropriate, and the battery cells 11 have a more appropriate maximum dimension in the first direction X, so that each row of battery cells 11 can be arranged more compactly in the box 2 along the first direction X.

[0134] With such arrangement, on the one hand, since the battery cells 11 have a relatively suitable maximum size in the first direction X, the battery cells 11 can have a higher heat dissipation capacity, which is convenient for the battery cells 11 to dissipate heat efficiently, which helps to reduce the temperature of the battery cells 11, so that the maximum temperature of the battery cells 11 can be within a more optimal range, which is conducive to extending the service life of the battery device 10. On the other hand, since each row of battery cells 11 has a relatively suitable number of battery cells 11, each row of battery cells 11 has a higher grouping efficiency in the first direction X, for example, but not limited to, it can save parts between adjacent battery cells 11 along the first direction X, save the arrangement of the outer shell 1121 of the battery cells 11 in the first direction X, and reduce the space waste problem caused by the arrangement tolerance between adjacent battery cells 11, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the first direction X, which helps to improve the space utilization rate of the battery device 10 and improve the energy density of the battery device 10. Therefore, by adopting the above technical solution, the battery device 10 can have a higher heat dissipation capacity and energy density, so that the maximum temperature and energy density of the battery device 10 can be within a relatively optimal range, that is, when the maximum temperature of the battery cell 11 of the battery device 10 is relatively low, the battery device 10 has a higher energy density, so that the battery device 10 can take into account the advantages of high heat dissipation capacity and high energy density, and improve the performance and reliability of the battery device 10. In this way, the battery device 10 can have a high-efficiency fast charging capability.

[0135] It should be supplemented here that, since the battery cell 11 has a relatively suitable maximum size in the first direction X, the heat generated by the battery cell 11 can be reduced, thereby helping to reduce the maximum temperature of the battery cell 11 .

[0136] It should be noted that the maximum dimension of the battery cell 11 along the second direction Y is ≤ 400 mm, and the electrode terminals 111 are provided at the two opposite ends of the battery cell 11 along the second direction Y, so that the battery cell 11 has a relatively suitable length of the overcurrent path, which can improve the problem of the battery cell 11 generating a very large amount of heat due to the overlong overcurrent path. In this way, the heat generated by the battery cell 11 can be within a more optimal range, so that the maximum temperature of the battery cell 11 can be within a more optimal range, which is conducive to extending the service life of the battery device 10.

[0137] It should be further explained that, by adopting the above technical solution, each row of battery cells 11 can be arranged relatively compactly in the box body 2 along the first direction X, so that the battery cell array 1 can be arranged relatively compactly in the box body 2 along the first direction X. In this way, on the one hand, the battery cells 11 in each row of battery cells 11 can be relatively compact along the first direction X, and the battery cells 11 in each row and the first inner wall 2111 can be relatively compact along the first direction X, which helps to improve the space utilization of the battery device 10 and helps to improve the energy density of the battery device 10. On the other hand, the arrangement between the battery cells 11 in each row of battery cells 11 and between each row of battery cells 11 and the first inner wall 2111 will not be too compact, so that the heat dissipation of the battery cells 11 is convenient, which helps to improve the heat dissipation capacity of the battery device 10 and helps to reduce the maximum temperature of the battery cells 11.

[0138] In some embodiments, the battery cell 11 may be approximately a cylindrical structure, and the second direction Y is substantially the length extension direction of the battery cell 11 , that is, the axial direction of the battery cell 11 .

[0139] In some embodiments, Figure 5 As shown, and in combination with other drawings. The battery cell 11 can be approximately a rectangular structure, and the battery cell 11 has a length, a width and a thickness. Among them, the length of the battery cell 11 can be greater than the width of the battery cell 11, and greater than the thickness of the battery cell 11. Among them, the second direction Y can be roughly the length extension direction of the battery cell 11, the first direction X can be roughly the thickness extension direction of the battery cell 11, and the third direction Z can be roughly the width extension direction of the battery cell 11. The first direction X and the third direction Z intersect, and the second direction Y and the third direction Z intersect.

[0140] The meaning of the first direction X and the third direction Z intersecting, and the second direction Y and the third direction Z intersecting can be explained in the same way as the first direction X and the second direction Y intersecting, and will not be repeated here. As an example, the first direction X and the second direction Y are perpendicular, the first direction X and the third direction Z are perpendicular, and the second direction Y and the third direction Z are perpendicular.

[0141] In some embodiments, please refer to Figures 6 to 8 , and combined with other drawings. The second size L2*N / the first size L1∈[0.848, 0.947].

[0142] The second size L2*N / first size L1∈[0.848, 0.948] means that 0.848≤second size L2*N / first size L1≤0.947, and the specific value of the second size L2*N / first size L1 can be 0.848, 0.85, 0.855, 0.86, 0.865, 0.87, 0.875, 0.88, 0.885, 0.89, 0.895, 0.9, 0.905, 0.91, 0.915, 0.92, 0.925, 0.93, 0.935, 0.94, 0.945, 0.947, etc.

[0143] Such configuration enables the battery device 10 to have a higher heat dissipation capability and energy density, thereby enabling the battery device 10 to have the advantages of both high heat dissipation capability and high energy density.

[0144] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. The third dimension L3 ≥ 200 mm.

[0145] It can be understood that 200mm≤the third dimension L3≤400mm, and the third dimension L3 can specifically be 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm, 390mm, 400mm, etc.

[0146] By adopting the above technical solution, the maximum dimension (i.e., the third dimension L3) of the battery cell 11 in the second direction Y has a certain value range. In this way, on the one hand, the battery cell 11 can have a flow path of a relatively suitable length, which can improve the problem of the battery cell 11 generating a very large amount of heat due to the excessive flow path, so that the heat generated by the battery cell 11 is within a relatively optimal range, thereby making the maximum temperature of the battery cell 11 within a relatively optimal range, which is conducive to extending the service life of the battery device 10. On the other hand, when the maximum dimensions of the two first inner walls 2111 along the first direction X are predetermined, it is convenient to reduce the number of battery cells 11 in each column, that is, to reduce the value of M, so that each column of battery cells 11 can have a relatively suitable grouping efficiency in the second direction Y, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the second direction Y, which is helpful to improve the space utilization rate of the battery device 10 and is conducive to improving the energy density of the battery device 10.

[0147] In some embodiments, please refer to Figures 6 to 8 , and combined with other drawings. N≥40.

[0148] Specifically, N can be 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, etc.

[0149] By setting N≥40, when the maximum dimensions of the two first inner walls 2111 along the first direction X are predetermined, the maximum dimension of the battery cell 11 in the first direction X will not be too large, so that the battery cell 11 has lower heat generation and higher heat dissipation capacity, which is beneficial to extending the service life of the battery device 10.

[0150] In some embodiments, please refer to Figures 6 to 8 , and combined with other drawings. N≤150.

[0151] It can be understood that 40≤N≤150, and N can specifically be 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, etc.

[0152] In this way, when the maximum dimensions of the two first inner walls 2111 along the first direction X are predetermined, the maximum dimensions of the battery cells 11 in the first direction X will not be too large or too small, and the number of battery cells 11 in each row is relatively appropriate. In this way, on the one hand, the battery cells 11 can have a lower heat generation and a higher heat dissipation capacity, which is conducive to extending the service life of the battery device 10. On the other hand, the grouping efficiency of each row of battery cells 11 in the first direction X can be improved, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the first direction X, which is helpful to improve the space utilization rate of the battery device 10 and improve the energy density of the battery device 10. In this way, the battery device 10 is conducive to taking into account the advantages of high heat dissipation capacity and high energy density.

[0153] In some embodiments, please refer to Figures 6 to 10 , and combined with other figures. M∈[3,8].

[0154] It will be appreciated that M may be 3, 4, 5, 6, 7 or 8.

[0155] With such arrangement, each column of battery cells 11 has a relatively suitable number of battery cells 11, and the battery cells 11 have a relatively suitable maximum size in the second direction Y, so that each column of battery cells 11 can be relatively compactly arranged in the box body 2 along the second direction Y. With such arrangement, on the one hand, because the battery cells 11 have a relatively suitable maximum size in the second direction Y, the battery cells 11 can have a relatively suitable length of the overcurrent path, which can improve the problem of the battery cells 11 generating a very large amount of heat due to the overly large overcurrent path, so that the heat generated by the battery cells 11 is within a relatively optimal range, thereby making the maximum temperature of the battery cells 11 within a relatively optimal range, which is conducive to extending the service life of the battery device 10. On the other hand, because each column of battery cells 11 has a relatively suitable number of battery cells 11, each column of battery cells 11 has a higher grouping efficiency in the second direction Y. For example, it can be, but not limited to, saving parts between adjacent battery cells 11 along the second direction Y, saving the arrangement of the outer shell 1121 of the battery cells 11 in the second direction Y, and reducing the space waste problem caused by the arrangement tolerance between adjacent battery cells 11, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the second direction Y, which helps to improve the space utilization of the battery device 10 and improve the energy density of the battery device 10. In this way, the performance and reliability of the battery device 10 can be improved, so that the battery device 10 can have high-efficiency fast charging capabilities.

[0156] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 6 , Figure 7 and Fig.11 , and combined with other drawings. Among them, Fig.11 Some embodiments of the present application provide partial schematic diagrams of the battery device 10, specifically partial schematic diagrams of the battery device 10 from the perspective of the third direction Z. The battery device 10 has a length direction a and a width direction b, and the length of the battery device 10 is greater than the width of the battery device 10.

[0157] It can be understood that the battery device 10 is approximately a rectangular structure, that is, the box body 2 is approximately a rectangular structure, so that the battery device 10 has a length direction a and a width direction b.

[0158] The length of the battery device 10 is greater than the width of the battery device 10 , which means that the maximum dimension of the battery device 10 along the length direction a is greater than the maximum dimension of the battery device 10 along the width direction b.

[0159] Among some possible designs, such as Figure 7As shown, the second direction Y is the length direction a of the battery device 10. The maximum dimension of the battery device 10 along the second direction Y may be the length of the battery device 10. The first direction X may be, but is not limited to, the width direction b of the battery device 10, and the maximum dimension of the battery device 10 along the first direction X may be the width of the battery device 10, that is, the fifth dimension L5 mentioned below may be the width of the battery device 10.

[0160] Or, in some other possible designs, such as Fig.11 As shown, the second direction Y is the width direction b of the battery device 10. The maximum dimension of the battery device 10 along the second direction Y may be the width of the battery device 10. The first direction X may be, but is not limited to, the length direction a of the battery device 10, and the maximum dimension of the battery device 10 along the first direction X may be the length of the battery device 10, that is, the fifth dimension L5 mentioned below may be the length of the battery device 10.

[0161] By adopting the above technical solution, the battery cell array 1 can be arranged in the box body 2 according to requirements, which can improve the flexibility and convenience of arranging the battery cell array 1 in the box body 2.

[0162] In some embodiments, see Figure 7 , and in combination with other drawings. The second direction Y is the walking direction c of the electric device having the battery device 10 .

[0163] As an example, when the electric device is a vehicle 3000 , the moving direction c of the electric device is the length extension direction of the vehicle 3000 , that is, the driving direction of the vehicle 3000 .

[0164] It can be understood that when the second direction Y is the length direction a of the battery device 10, Figure 7 As shown, the length direction a of the battery device 10 is the running direction c of the electric device. When the second direction Y is the width direction b of the battery device 10, the width direction b of the battery device 10 is the running direction c of the electric device.

[0165] In some embodiments, see Fig.11 , and in combination with other drawings. The first direction X is the walking direction c of the electric device having the battery device 10 .

[0166] It can be understood that when the first direction X is the length direction a of the battery device 10, Fig.11 As shown, the length direction a of the battery device 10 is the travel direction c of the electric device. The second direction Y intersects with the length direction a of the battery device 10 . For example, the second direction Y may be the width direction b of the battery device 10 .

[0167] When the first direction X is the width direction b of the battery device 10, the width direction b of the battery device 10 is the running direction c of the electric device. The second direction Y intersects with the width direction b of the battery device 10, for example, the second direction Y is the length direction a of the electric device.

[0168] By adopting the above technical solution, the battery cell array 1 can be arranged in the box 2 according to needs, which can improve the flexibility and convenience of arranging the battery device 10 on the electrical device.

[0169] In some embodiments, please refer to Figures 5 to 10 The battery cell 11 has first surfaces 101 on two opposite sides along the first direction X, and second surfaces 102 on two opposite ends along the second direction Y. The electrode terminal 111 extends from the second surface 102, and the area of ​​the first surface 101 is larger than the area of ​​the second surface 102.

[0170] It can be understood that the battery cell 11 is provided with electrode terminals 111 at both opposite ends along the second direction Y. The battery cell body 112 of the battery cell 11 is provided with first surfaces 101 at both opposite sides along the first direction X, that is, the shell 1121 is provided with first surfaces 101 at both opposite sides along the first direction X. The battery cell body 112 of the battery cell 11 is provided with second surfaces 102 at both opposite ends along the second direction Y, that is, the shell 1121 is provided with second surfaces 102 at both opposite ends along the second direction Y, and the electrode terminals 111 extend from the second surfaces 102. The first surface 101 and the second surface 102 are both outer surfaces of the battery cell body 112, that is, outer surfaces of the shell 1121.

[0171] By making the area of ​​the first surface 101 larger than the area of ​​the second surface 102, the maximum dimension of the monomer body 112 along the first direction X is smaller than the maximum dimension of the monomer body 112 along the second direction Y, and thus the maximum dimension of the battery cell 11 along the first direction X is smaller than the maximum dimension of the battery cell 11 along the second direction Y (i.e., the third dimension L3), that is, the length of the battery cell 11 is larger than the thickness of the battery cell 11. With such a configuration, the battery cell 11 can have a better heat dissipation capability, so as to reduce the maximum temperature of the battery cell 11, and thus help to extend the service life of the battery device 10.

[0172] In some embodiments, please refer to Figures 5 to 8 , and in combination with other drawings. The maximum dimension of the battery cell 11 along the first direction X is the second dimension L2, and the second dimension L2∈[10mm, 45mm].

[0173] Specifically, 10 mm ≤ the second size L2 ≤ 45 mm, and the second size L2 can specifically be 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, etc.

[0174] Such arrangement enables the battery cells 11 to have a smaller size along the first direction X. Thus, on the one hand, the battery cells 11 can have a higher heat dissipation capacity, which is convenient for the battery cells 11 to dissipate heat efficiently, which helps to reduce the temperature of the battery cells 11, so that the maximum temperature of the battery cells 11 can be within a more optimal range, which is conducive to extending the service life of the battery device 10. On the other hand, when the maximum size of the two first inner walls 2111 along the first direction X is predetermined, each row of battery cells 11 has a more appropriate number of battery cells 11, that is, the value of N is more appropriate, so that each row of battery cells 11 can have a higher grouping efficiency in the first direction X, for example, but not limited to, it can save parts between adjacent battery cells 11 along the first direction X, and can reduce the space waste problem caused by the arrangement tolerance between adjacent battery cells 11, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the first direction X, which helps to improve the space utilization of the battery device 10 and is conducive to improving the energy density of the battery device 10. Therefore, by adopting the above technical solution, the battery device 10 can have a higher heat dissipation capacity and energy density, that is, the battery device 10 can take into account the advantages of high heat dissipation capacity and high energy density.

[0175] In some embodiments, please refer to Figures 5 to 8 , and combined with other drawings. The second size L2∈[15mm, 30mm].

[0176] Specifically, 15mm≤the second size L2≤30mm, and the second size L2 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, etc.

[0177] By adopting the above technical solution, the battery cell 11 has a smaller size along the first direction X. In this way, on the one hand, the battery cell 11 can have a higher heat dissipation capacity, so that the maximum temperature of the battery cell 11 can be within a more optimal range. On the other hand, when the maximum size of the two first inner walls 2111 along the first direction X is predetermined, each row of battery cells 11 has a more appropriate number of battery cells 11, that is, the value of N is more appropriate, so that each row of battery cells 11 can have a higher grouping efficiency in the first direction X, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the first direction X, which is helpful to improve the space utilization of the battery device 10 and improve the energy density of the battery device 10. Therefore, by adopting the above technical solution, it is helpful for the battery device 10 to have a higher heat dissipation capacity and energy density.

[0178] In some embodiments, please refer to Figures 5 to 10 The battery cell 11 has a third surface 103 at two opposite ends along the third direction Z, and the area of ​​the first surface 101 is larger than the area of ​​the third surface 103. The third direction Z intersects with the first direction X, and the third direction Z intersects with the second direction Y.

[0179] It can be understood that the two opposite ends of the monomer body 112 along the third direction Z are provided with third surfaces 103, that is, the two opposite ends of the shell 1121 along the third direction Z are provided with third surfaces 103. The third surface 103 is the outer surface of the monomer body 112, that is, the outer surface of the shell 1121.

[0180] By making the area of ​​the first surface 101 larger than the area of ​​the third surface 103, the maximum dimension of the battery body 112 along the third direction Z is larger than the maximum dimension of the battery body 112 along the first direction X, that is, the fourth dimension L4 mentioned below is larger than the second dimension L2, that is, the width of the battery cell 11 is larger than the thickness of the battery cell 11. With such a configuration, the battery cell 11 can have a better heat dissipation capability to reduce the maximum temperature of the battery cell 11.

[0181] As an example, Figure 5 As shown, and combined with other drawings. The third surface 103 is larger than the second surface 102. Based on this, the maximum dimension of the cell body 112 along the second direction Y (i.e., the third dimension L3) is larger than the maximum dimension of the battery cell 11 along the third direction Z (i.e., the fourth dimension L4), and the maximum dimension of the battery cell 11 along the third direction Z is larger than the maximum dimension of the battery cell 11 along the first direction X (i.e., the second dimension L2), that is, the length of the battery cell 11 is larger than the width of the battery cell 11, and the width of the battery cell 11 is larger than the thickness of the battery cell 11.

[0182] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 , and in combination with other drawings. The maximum dimension of the battery cell 11 along the third direction Z is a fourth dimension L4, and the fourth dimension L4∈[60mm, 160mm].

[0183] The maximum dimension of the battery cell 11 along the third direction Z refers to the maximum dimension of the battery cell body 112 along the third direction Z, that is, the maximum dimension of the housing 1121 along the third direction Z, which is the fourth dimension L4.

[0184] Specifically, 60mm≤the fourth dimension L4≤160mm, and the fourth dimension L4 can specifically be 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, etc.

[0185] By adopting the above technical solution, the battery cell 11 has a more suitable maximum size in the third direction Z, which helps the battery cell 11 to have a better heat dissipation capacity to reduce the maximum temperature of the battery cell 11. In addition, this configuration makes the battery cell 11 a short-blade battery.

[0186] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 , and in combination with other drawings. The fourth dimension L4∈[80mm, 130mm].

[0187] Specifically, 80mm≤the fourth dimension L4≤130mm, and the fourth dimension L4 can be 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, etc.

[0188] By adopting the above technical solution, the battery cell 11 has a more suitable maximum size in the third direction Z, which helps to make the battery cell 11 have a better heat dissipation capability to reduce the maximum temperature of the battery cell 11.

[0189] In some embodiments, please refer to Figures 6 to 8 , and combined with other drawings. The box body 2 includes two first walls 211 arranged opposite to each other along the first direction X, the first inner wall 2111 is the inner wall of the first wall 211, and the outer wall of the first wall 211 is the first outer wall 2112. The maximum distance between the first outer walls 2112 of the two first walls 211 along the first direction X is the fifth dimension L5, and the second dimension L2*N / fifth dimension L5∈[0.744, 0.918].

[0190] The first wall 211 is a solid wall of the box body 2 , and the two first walls 211 are arranged opposite to each other along the first direction X. The walls of the two first walls 211 facing each other along the first direction X are first inner walls 2111 , and the walls of the two first walls 211 facing each other along the first direction X are first outer walls 2112 .

[0191] The first wall 211 may be, but is not limited to, an expansion beam in the box body 2 , and is used to resist the expansion of the battery cell 11 along the second direction Y, so as to improve the reliability of the battery device 10 .

[0192] The second size L2*N / fifth size L5∈[0.744, 0.918] means that 0.744≤second size L2*N / fifth size L5≤0.918, and the specific values ​​of the second size L2*N / fifth size L5 can be 0.744, 0.75, 0.76, 0.77, 0.78, 0.79, 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.918, etc.

[0193] By adopting the above technical solution, the battery cells 11 have a more appropriate maximum size along the first direction X, and each row of battery cells 11 has a more appropriate number of battery cells 11. In this way, the battery device 10 has high heat dissipation capacity and high energy density.

[0194] In some embodiments, please refer to Figures 6 to 8 , and combined with other drawings. The second size L2*N / the fifth size L5∈[0.82, 0.918].

[0195] The second size L2*N / fifth size L5∈[0.82, 0.918] means that 0.82≤second size L2*N / fifth size L5≤0.918, and the specific value of the second size L2*N / fifth size L5 can be 0.82, 0.825, 0.83, 0.835, 0.84, 0.845, 0.85, 0.855, 0.86, 0.865, 0.87, 0.875, 0.88, 0.885, 0.89, 0.895, 0.9, 0.905, 0.91, 0.915, 0.918, etc.

[0196] By adopting the above technical solution, the battery cells 11 have a more suitable maximum size along the first direction X, and each row of battery cells 11 has a more suitable number of battery cells 11. In this way, the maximum temperature and energy density of the battery device 10 are both within a more optimal range.

[0197] The following is a detailed description based on specific experimental data:

[0198] In the experiment, the thickness of the battery cell 11 extends in the same direction as the first direction X, the length of the battery cell 11 extends in the same direction as the second direction Y, and the width of the battery cell 11 extends in the same direction as the third direction Z. For specific data, see Table 1:

[0199] Table 1

[0200]

[0201]

[0202] It can be known from the above embodiments that when the value range of the second size L2*N / first size L1 is in the interval of [0.771, 0.947], and the value range of the second size L2*N / fifth size L5 is in the interval of [0.744, 0.918], the energy density of the battery device 10 is ≥260Wh / L, and the maximum temperature of the battery cell 11 is less than 60°C. In this way, the maximum temperature and energy density of the battery device 10 are both within a relatively optimal range, that is, when the maximum temperature of the battery cell 11 of the battery device 10 is relatively low, the battery device 10 has a relatively high energy density, so that the battery device 10 can take into account the advantages of the low maximum temperature of the battery cell 11 and the high energy density of the power battery, so that the battery device 10 can have high-efficiency fast charging capability.

[0203] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 , and in combination with other drawings. The battery cell 11 includes at least one set of electrode terminals 111 at both opposite ends along the second direction Y, and the set of electrode terminals 111 includes a positive electrode terminal 111a and a negative electrode terminal 111b spaced apart along the third direction Z. The third direction Z intersects the first direction X, and the third direction Z intersects the second direction Y.

[0204] It can be understood that the battery cell 11 is provided with a plurality of electrode terminals 111 at both opposite ends in the second direction Y, and the plurality of electrode terminals 111 at each end of the battery cell 11 in the second direction Y are spaced apart along the third direction Z. Moreover, at each end of the battery cell 11 in the second direction Y, the plurality of electrode terminals 111 are grouped in pairs and have different polarities.

[0205] It can be understood that at least one set of electrode terminals 111 is provided at one end of the battery cell 11 along the second direction Y, and at least one set of electrode terminals 111 is also provided at the other end of the battery cell 11 along the second direction Y. Each set of electrode terminals 111 includes two electrode terminals 111 with different polarities that are spaced apart along the third direction Z. That is, each set of electrode terminals 111 includes a positive electrode terminal 111a and a negative electrode terminal 111b that are spaced apart along the third direction Z.

[0206] By providing at least one set of electrode terminals 111 with different polarities at each end of the battery cell 11 along the second direction Y, the average current path of the battery cell 11 can be effectively shortened, thereby reducing the internal resistance of the battery cell 11 and reducing the heat generated by the battery cell 11, thereby reducing the maximum temperature of the battery cell 11 and improving the performance and reliability of the battery device 10.

[0207] As an example, Figure 5 , Fig. 9 , Fig.10 and Fig.12 As shown in the figure, and combined with other figures. Fig.12 for Figure 3 A three-dimensional structural diagram of a battery cell array 1 of a battery device 10 is provided. Each end of the battery cell 11 along the second direction Y is provided with a group of electrode terminals 111, and each group of electrode terminals 111 includes positive electrode terminals 111a and negative electrode terminals 111b spaced apart along the third direction Z.

[0208] like Fig.12 As shown, and in combination with other drawings. The battery cell array 1 includes multiple rows of battery cells 11, that is, the number M is multiple, and the battery cell array 1 may include a first row of battery cells 11, a second row of battery cells 11, a third row of battery cells 11... the second to last row of battery cells 11, and the last row of battery cells 11. As an example, in each row of battery cells 11, the end electrode terminals 111 of the battery cells 11 along the second direction Y are connected in series through the busbar component 3, so that each row of battery cells 11 has two total positive electrodes and a total negative electrode. The two total positive electrodes of the first row of battery cells 11 can be connected to serve as the total positive electrode of the battery cell array 1. The two total negative electrodes of the first row of battery cells 11 can be connected to the two total positive electrodes of the second row of battery cells 11 through the busbar 3, and the two total negative electrodes of the second row of battery cells 11 can be connected to the two total positive electrodes of the third row of battery cells 11 through the busbar 3... and so on, the two total negative electrodes of the second-to-last row of battery cells 11 can be connected to the two total positive electrodes of the last row of battery cells 11 through the busbar 3, so that the first row of battery cells 11, the second row of battery cells 11, the third row of battery cells 11... the second-to-last row of battery cells 11 and the last row of battery cells 11 are connected in series. The two total negative electrodes of the last row of battery cells 11 are connected to serve as the total negative electrode of the battery cell array 1.

[0209] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 , and in combination with other drawings. The battery cell 11 further includes a pressure relief mechanism 113 .

[0210] The pressure relief mechanism 113 is a mechanism that can release the internal pressure of the battery cell 11 when the internal pressure or temperature of the battery cell 11 reaches a threshold value. For example, when the battery cell 11 is working normally, the gas pressure inside the battery cell 11 is less than the opening pressure value of the pressure relief mechanism 113, the pressure relief mechanism 113 is in a closed state, and the gas inside the battery cell 11 is not connected to the external gas. When the battery cell 11 has thermal runaway due to internal and external factors such as overcharge, overdischarge, overheating, and mechanical collision, a large amount of high-temperature and high-pressure gas, flame and other high-temperature and high-pressure media are generated inside the battery cell 11, making the pressure inside the battery cell 11 greater than the opening pressure value of the pressure relief mechanism 113, and the pressure relief mechanism 113 changes from a closed state to an open state, and the high-temperature and high-pressure gas, flame and other high-temperature and high-pressure media inside the battery cell 11 can be discharged to the outside of the battery cell 11 through the pressure relief mechanism 113.

[0211] The pressure relief mechanism 113 is disposed on the cell body 112. Specifically, the pressure relief mechanism 113 can be disposed on the outer shell 1121 of the battery cell 11. The pressure relief mechanism 113 can be a weak structure disposed on the outer shell 1121 of the battery cell 11; or, the pressure relief mechanism 113 can also be a structure such as a pressure valve. When the pressure relief mechanism 113 is a weak structure disposed on the outer shell 1121, the structural strength of the pressure relief mechanism 113 is lower than the structural strength of other positions of the outer shell 1121. In this way, when thermal runaway occurs in the battery cell 11, the high-temperature and high-pressure medium such as high-temperature and high-pressure gas and flame generated by the battery cell 11 can break through the pressure relief mechanism 113 to be released outside the battery cell 11.

[0212] Among them, Figure 5 As shown, the pressure relief mechanism 113 can be arranged on the end cover 11212 of the housing 1121. The pressure relief mechanism 113 can also be arranged on the shell 11211 of the housing 1121.

[0213] In some possible designs, the pressure relief mechanism 113 may be integrally connected to the housing 1121 , and a break mark is provided between the pressure relief mechanism 113 and the housing 1121 , and the break mark may be a notch or a break line, etc. Alternatively, the pressure relief mechanism 113 is separately provided on the housing 1121 .

[0214] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 At least one end of the battery cell 11 along the second direction Y includes the pressure relief mechanism 113 , and the pressure relief mechanism 113 is spaced apart from the electrode terminal 111 .

[0215] It can be understood that at least one end of the housing 1121 along the second direction Y is provided with a pressure relief mechanism 113 .

[0216] By arranging the pressure relief mechanism 113 at at least one end of the battery cell 11 along the second direction Y, the internal space of the box body 2 can be effectively saved, so as to help improve the space utilization and energy density of the battery device 10. In addition, it is also convenient to arrange the thermal management components 212 at the opposite ends of the battery cell array 1 along the third direction Z, and on this basis, the pressure relief mechanism 113 can effectively achieve the pressure relief effect of the battery cell 11.

[0217] In some embodiments, please refer to Figures 7 to 10 , and in combination with other drawings. N≥2, and in each row of battery cells 11, insulating glue is provided between two adjacent battery cells 11.

[0218] It can be understood that insulating glue may be provided between two battery cells 11 adjacent to each other along the first direction X. Specifically, insulating glue may be provided between the housings 1121 of two battery cells 11 adjacent to each other along the first direction X.

[0219] In some embodiments, please refer to Figures 7 to 10 , and in combination with other drawings. M≥2, and in each column of battery cells 11, insulating glue is provided between two adjacent battery cells 11.

[0220] It can be understood that insulating glue may be provided between two battery cells 11 adjacent to each other along the second direction Y.

[0221] Insulating glue may be disposed between the housings 1121 of two battery cells 11 adjacent to each other along the second direction Y. Insulating glue may also be disposed between the electrode terminals 111 of two battery cells 11 adjacent to each other along the second direction Y.

[0222] The insulating adhesive refers to an adhesive layer with insulating properties, and the adhesive layer may be, but is not limited to, structural adhesive, double-sided adhesive, and the like.

[0223] By providing insulating glue between two adjacent battery cells 11, on the one hand, the insulation effect between the two adjacent battery cells 11 can be achieved, and the adverse effects between the two adjacent battery cells 11 can be reduced, so that the battery device 10 can give full play to its performance. On the other hand, the two adjacent battery cells 11 can be fixed by the insulating glue, so that the fixing method of the battery cell array 1 is very simple, which is convenient for the assembly of the battery device 10 and can improve the production efficiency of the battery device 10. In addition, the insulating glue can achieve a protective effect during the thermal runaway process of the battery cell 11, and improve the high-voltage ignition problem caused by the particles ejected by the battery cell 11.

[0224] In some embodiments, insulating glue may be further provided between the first inner wall 2111 and the adjacent battery cell 11 to achieve insulation protection between the first inner wall 2111 and the battery cell 11 .

[0225] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 , and in combination with other drawings. A pressure relief mechanism 113 is provided on the battery cell 11 , and the pressure relief mechanism 113 is spaced apart from the electrode terminal 111 . At least part of the insulating glue is provided on the electrode terminal 111 and avoids the pressure relief mechanism 113 .

[0226] By at least partially disposing the insulating glue on the electrode terminal 111, the insulating glue can achieve insulation and fixation between two adjacent battery cells 11. In addition, the insulating glue avoids the pressure relief mechanism 113, which facilitates the pressure relief mechanism 113 to achieve a pressure relief effect.

[0227] In some embodiments, please refer to Figure 5 , Fig. 9 and Fig.10 , and combined with other drawings. The pressure relief mechanism 113 and the electrode terminal 111 are spaced apart along the third direction Z. In the third direction Z, the insulating glue exceeds the electrode terminal 111 and is spaced apart from the pressure relief mechanism 113. The third direction Z intersects with the first direction X, and the third direction Z intersects with the second direction Y.

[0228] It can be understood that at least part of the insulating glue is disposed on the electrode terminal 111 , the insulating glue extends beyond the electrode terminal 111 along the third direction Z, and the insulating glue and the pressure relief mechanism 113 are spaced apart along the third direction Z.

[0229] Such a configuration makes it easy for the insulating glue to be disposed on the electrode terminal 111 and avoid the pressure relief mechanism 113 , so that the insulating glue can achieve the functions of insulation protection, fixation, thermal runaway protection, etc., and can ensure the function of the pressure relief mechanism 113 to a certain extent.

[0230] As an example, Figure 5 , Fig. 9 and Fig.10 As shown, and combined with other drawings. A second inner wall 2121 is provided at one end of the box body 2 along the third direction Z, and the second inner wall 2121 is the inner wall surface of the internal space of the box body 2. The second inner wall 2121 is connected between the two first inner walls 2111, and the battery cell array 1 is arranged on the second inner wall 2121. The electrode terminal 111 is spaced between the pressure relief mechanism 113 and the second inner wall 2121 along the third direction Z, and the insulating glue is provided on the second inner wall 2121, the outer shell 1121 and the electrode terminal 111. The insulating glue extends beyond the electrode terminal 111 toward the pressure relief mechanism 113 along the third direction Z, and is spaced from the pressure relief mechanism 113 along the third direction Z.

[0231] It can be understood that the height of the insulating glue in the third direction Z is lower than the distance between the pressure relief mechanism 113 and the first inner wall 2111 in the third direction Z, so that the insulating glue can be filled between two adjacent battery cells 11 and avoid the pressure relief mechanism 113 .

[0232] In some embodiments, N≥2, and in each row of battery cells 11 , a partition component 213 is disposed between two adjacent battery cells 11 .

[0233] It can be understood that a partition component 213 can be arranged between two battery cells 11 adjacent along the first direction X. Specifically, a partition component 213 can be arranged between the outer shells 1121 of two battery cells 11 adjacent along the first direction X, and a partition component 213 can be arranged between the electrode terminals 111 of two battery cells 11 adjacent along the first direction X, so that the partition component 213 separates the two battery cells 11 adjacent along the first direction X.

[0234] In some embodiments, please refer to Figures 4 to 10 , and in combination with other drawings. M≥2, and in each column of battery cells 11 , a partition component 213 is provided between two adjacent battery cells 11 .

[0235] It can be understood that a partition component 213 can be provided between two battery cells 11 adjacent along the second direction Y. Specifically, a partition component 213 is provided between the electrode terminals 111 of two battery cells 11 adjacent along the second direction Y, and the partition component 213 separates the electrode terminals 111 of two battery cells 11 adjacent along the second direction Y.

[0236] Two adjacent battery cells 11 can be separated by the separator 213. On the one hand, the separator 213 can separate the high voltage between the two adjacent battery cells 11, which can reduce the adverse effects between the two adjacent battery cells 11, so that the battery device 10 can fully exert its performance. On the other hand, the overall strength of the battery cell array 1 can be improved, and the adverse effects of external factors such as vibration on the battery cell array 1 can be reduced, so that the adaptability of the battery device 10 can be effectively enhanced.

[0237] In some embodiments, a partition member 213 may be further provided between the first inner wall 2111 and the adjacent battery cell 11, so that the partition member 213 separates the electrode terminal 111 of the battery cell 11 from the first inner wall 2111. In this way, the high voltage of the battery cell 11 may be separated from the box body 2, thereby improving the reliability of the battery device 10 and the overall strength of the battery device 10.

[0238] The partition component 213 may be, but is not limited to, at least one of a heat conductor, a buffer, a partition plate, and a partition beam.

[0239] Specifically, the partition component 213 is configured to be at least one of a heat conductor, a buffer, a partition plate and a partition beam. On the basis of separating two adjacent battery cells 11 or separating the battery cell 11 and the first inner wall 2111, a corresponding partition component 213 can be set according to different needs to meet the corresponding usage requirements of the battery cell array 1.

[0240] Among them, when the partition component 213 is a heat conductor, the partition is arranged between two adjacent battery cells 11 or between the first inner wall 2111 and the adjacent battery cell 11, which can conduct the heat of the battery cell 11, help the battery cell 11 to dissipate heat, and thus help to reduce the maximum temperature of the battery cell 11.

[0241] Wherein, when the partition member 213 is a buffer, the buffer is arranged between two adjacent battery cells 11 or between the first inner wall 2111 and the adjacent battery cells 11. On the one hand, the buffer can absorb the tolerances generated during the manufacturing process between two adjacent battery cells 11 and between the first inner wall 2111 and the battery cells 11, so as to effectively install the battery cells 11. On the other hand, the buffer can provide a buffer between two adjacent battery cells 11 and between the first inner wall 2111 and the battery cells 11, reducing the situation where the battery cells 11 are squeezed and damaged. In addition, the buffer can absorb the expansion of the battery cells 11.

[0242] Among them, when the partition component 213 is a partition plate, the partition plate is arranged between two adjacent battery cells 11 or between the first inner wall 2111 and the adjacent battery cell 11. The partition plate is used to separate two adjacent battery cells 11 or the first inner wall 2111 and the adjacent battery cell 11, which can reduce the situation where the battery cell 11 is squeezed and damaged.

[0243] Among them, when the partition component 213 is a partition beam, the partition beam is arranged between two adjacent battery cells 11 or between the first inner wall 2111 and the adjacent battery cell 11. The partition beam is used to separate two adjacent battery cells 11 or the first inner wall 2111 and the adjacent battery cell 11, which can reduce the situation where the battery cell 11 is squeezed and damaged.

[0244] In some embodiments, when insulating glue is disposed between two adjacent battery cells 11 or between the first inner wall 2111 and an adjacent battery cell 11 , the insulating glue may be bonded and fixed to the partition component 213 .

[0245] In some embodiments, at least one end of the electrode terminal 111 along the second direction Y includes a pressure relief mechanism 113 , and the pressure relief mechanism 113 and the partition component 213 are spaced and arranged relatively along the second direction Y, so that the partition component 213 can achieve a certain degree of protection against thermal runaway of the battery cell 11 .

[0246] In some embodiments, please refer to Figure 4 , Figure 6 , Fig. 9 and Fig.10 , and in combination with other drawings. The housing 2 further includes a thermal management component 212, and the thermal management component 212 is provided at least at one end of the battery cell array 1 along the third direction Z. The thermal management component 212 is connected to the battery cell 11 to adjust the temperature of the battery cell 11. The third direction Z intersects with the first direction X, and the third direction Z intersects with the second direction Y.

[0247] The thermal management component 212 refers to a component that can achieve thermal management of the battery cell array 1. The thermal management component 212 may be, but is not limited to, a water cooling plate, a water cooling pipe, etc. A flow channel for circulating a heat exchange medium may be provided in the thermal management component 212. The heat exchange medium may be, but is not limited to, water, oil, etc. The heat exchange medium may perform cooling management or heating management on the battery cell array 1.

[0248] By providing a thermal management component 212 at at least one end of the battery cell array 1 along the third direction Z, the thermal management component 212 at at least one end of the battery cell array 1 along the third direction Z can perform thermal management on the battery cell array 1 .

[0249] In some embodiments, please refer to Figure 4 , Figure 6 , Fig. 9 and Fig.10 , and in combination with other drawings. Thermal management components 212 are provided at opposite ends of the battery cell array 1 along the third direction Z. In this way, on the one hand, the thermal management efficiency of the battery cell array 1 can be improved, thereby helping to reduce the maximum temperature of the battery cells 11 of the battery device 10. On the other hand, it helps to improve the temperature uniformity of the battery cell array 1, thereby helping to extend the service life of the battery device 10.

[0250] It should be supplemented here that, of the two heat management components 212 , one heat management component 212 is disposed on the first portion 21 , and the other heat management component 212 is disposed on the second portion 22 . The second inner wall 2121 may be disposed on the heat management component 212 .

[0251] In some embodiments, the thermal management component 212 may be provided with an inlet and an outlet, and the heat exchange medium may enter the flow channel of the thermal management component 212 through the inlet and then flow out from the outlet to achieve a circulating flow.

[0252] In some embodiments, the distribution direction of the inlet and outlet of one thermal management component 212 is substantially opposite to the distribution direction of the inlet and outlet of another thermal management component 212. Such a configuration can effectively improve the heat exchange efficiency of the heat exchange medium in the thermal management component 212 and the battery cell array 1, thereby helping to improve the thermal management efficiency of the battery cell array 1, helping to reduce the maximum temperature of the battery cell 11, and also helping to improve the temperature uniformity of the battery cell array 1.

[0253] The first wall 211 may be provided with openings corresponding to the inlet and the outlet of the thermal management component 212 , so as to facilitate the external heat exchange medium to enter and exit the thermal management component 212 through the first wall 211 .

[0254] See also Figure 1 , and in combination with other drawings. The electrical device provided in the embodiment of the present application includes a battery device 10. The battery device 10 in this embodiment is the same as the battery device 10 in the above embodiments. For details, please refer to the relevant description of the battery device 10 in the above embodiments, which will not be repeated here.

[0255] The electrical device provided in the embodiment of the present application adopts the battery device 10 involved above, so that the battery device 10 can take into account the advantages of high heat dissipation capacity and high energy density, thereby improving the performance and reliability of the battery device 10, which helps to improve the performance and reliability of the electrical device.

[0256] As one of the embodiments of this application, Figures 4 to 10As shown, the battery device 10 includes a box 2 and a battery cell array 1. The box 2 includes two first walls 211 arranged opposite to each other along a first direction X, and the first wall 211 is provided with a first inner wall 2111 and a first outer wall 2112 opposite to each other along the first direction X. The maximum dimension of the first inner wall 2111 of the two first walls 211 in the first direction X is a first dimension L1, and the maximum dimension of the first outer wall 2112 of the two first walls 211 in the first direction X is a fifth dimension L5. The battery cell array 1 includes M*N battery cells 11, and the M*N battery cells 11 are arranged in an array of M rows and N columns to form a battery cell array 1. In the battery cell array 1, a plurality of battery cells 11 in each row are arranged along the first direction X, and a plurality of battery cells 11 in each column are arranged along the second direction Y. The maximum dimension of the battery cell 11 along the first direction X is a second dimension L2, and the maximum dimension of the battery cell 11 along the second direction Y is a third dimension L3, and electrode terminals 111 are provided at opposite ends of the battery cell 11 along the second direction Y. Wherein, M∈[3, 8], N∈[40, 150], M and N are both positive integers. The third dimension L3∈[200 mm, 400 mm], the second dimension L2*N / the first dimension L1∈[0.771, 0.947], the second dimension L2*N / the fifth dimension L5∈[0.744, 0.918]. The first direction X is perpendicular to the second direction Y.

[0257] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: The box body comprises two first inner walls arranged opposite to each other along a first direction, and the maximum distance between the two first inner walls along the first direction is a first dimension; A battery cell array is provided between the two first inner walls; the battery cell array comprises battery cells arranged in an array of M rows and N columns; in the battery cell array, the battery cells in each row are arranged along the first direction, and the battery cells in each column are arranged along the second direction; the maximum dimension of the battery cell along the first direction is the second dimension, the maximum dimension of the battery cell along the second direction is the third dimension, and at least one end of the battery cell along the second direction is provided with an electrode terminal; Among them, M≥1, N≥1, M and N are both positive integers; the third size ≤400 mm, second size*N / first size∈[0.771, 0.947]; the first direction intersects the second direction.

2. The battery device according to claim 1, characterized in that: The second size*N / first size∈[0.848, 0.947].

3. The battery device according to claim 1 or 2, characterized in that: The third dimension is ≥200 mm.

4. The battery device according to any one of claims 1 to 3, characterized in that: N≥40。 5. The battery device according to claim 4, characterized in that: N≤150。 6. The battery device according to any one of claims 1 to 5, characterized in that: The battery device has a length direction and a width direction, the length of the battery device is greater than the width of the battery device; the second direction is the length direction of the battery device or the width direction of the battery device.

7. The battery device according to any one of claims 1 to 6, characterized in that: The second direction is a walking direction of the electric device having the battery device; or, the first direction is a walking direction of the electric device having the battery device.

8. The battery device according to any one of claims 1 to 7, characterized in that: The battery cell has first surfaces at two opposite sides along the first direction, and second surfaces at two opposite ends along the second direction. The electrode terminal extends from the second surface, and the area of ​​the first surface is larger than that of the second surface.

9. The battery device according to claim 8, characterized in that: The second size ∈ [10mm, 45mm].

10. The battery device according to claim 9, characterized in that: The second size ∈ [15mm, 30mm].

11. The battery device according to any one of claims 8 to 10, characterized in that: The battery cell is provided with third surfaces at two opposite ends along a third direction, the area of ​​the first surface is larger than the area of ​​the third surface, and the third direction intersects the first direction and the second direction respectively.

12. The battery device according to claim 11, characterized in that: The maximum dimension of the battery cell along the third direction is a fourth dimension, and the fourth dimension ∈ [60 mm, 160 mm].

13. The battery device according to claim 12, characterized in that: The fourth size ∈[80mm, 130mm].

14. The battery device according to any one of claims 1 to 13, characterized in that: The box body includes two first walls arranged opposite to each other along the first direction, the first inner wall is the inner wall of the first wall, the outer wall of the first wall is the first outer wall, the maximum distance between the first outer walls of the two first walls along the first direction is the fifth dimension, and the second dimension*N / fifth dimension∈[0.744, 0.918].

15. The battery device according to claim 14, characterized in that: The second size*N / the fifth size∈[0.82, 0.918].

16. The battery device according to any one of claims 1 to 15, characterized in that: The battery cell comprises at least one group of electrode terminals at both opposite ends in the second direction, and one group of electrode terminals comprises positive electrode terminals and negative electrode terminals spaced apart along a third direction; the third direction intersects the first direction and the second direction respectively.

17. The battery device according to any one of claims 1 to 16, characterized in that: At least one end of the battery cell along the second direction includes a pressure relief mechanism spaced apart from the electrode terminal.

18. The battery device according to any one of claims 1 to 17, characterized in that: N≥2, and in each row of the battery cells, insulating glue is provided between two adjacent battery cells; And / or, M≥2, and in each column of the battery cells, insulating glue is provided between two adjacent battery cells.

19. The battery device according to claim 18, characterized in that: The battery cell is provided with a pressure relief mechanism spaced apart from the electrode terminal, and at least a portion of the insulating glue is provided on the electrode terminal and avoids the pressure relief mechanism.

20. The battery device according to claim 19, characterized in that The pressure relief mechanism and the electrode terminal are spaced apart along a third direction, and in the third direction, the insulating glue exceeds the electrode terminal and is spaced apart from the pressure relief mechanism; the third direction intersects with the first direction and the second direction respectively.

21. The battery device according to any one of claims 1 to 20, characterized in that: N≥2, and in each row of the battery cells, a partition component is provided between two adjacent battery cells; And / or, M≥2, and in each column of the battery cells, a partition component is provided between two adjacent battery cells.

22. The battery device according to any one of claims 1 to 21, characterized in that: The box body further includes a thermal management component disposed at at least one end of the battery cell array along a third direction, the thermal management component being connected to the battery cell to adjust the temperature of the battery cell, and the third direction intersects the first direction and the second direction respectively.

23. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-22.

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