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 plurality of battery monomer assemblies. The box body is provided with a first containing cavity. The first containing cavity is provided with a first inner wall and a second inner wall connected to the periphery of the first inner wall. On a projection plane perpendicular to the first direction, the area of the orthographic projection of the first inner wall is a first area. The plurality of battery monomer assemblies are arranged in the first accommodating cavity along the second direction, and are arranged along the first direction with the first inner wall; the battery monomer assembly comprises N battery monomers arranged along a third direction, the maximum size of the battery monomers along the third direction is a first size, the maximum size of the battery monomers along a second direction is a second size, the second size is less than or equal to 400mm, and at least one end of each battery monomer along the second direction is provided with an electrode terminal. N > = 1, N is a positive integer, and the first area / (N * first size * second size) belongs to [3, 8]. In this way, the battery device can give consideration to both energy density and temperature.

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, so that it can have a higher energy density. This will inevitably cause the battery cells to heat up significantly during use, so that the temperature of the battery cells is high, affecting the service life of the power battery. In other cases, by adjusting the arrangement of the battery cells in the box, the temperature rise of the battery cells can be reduced to reduce the temperature of the battery cells and extend the service life of the power battery. 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 the temperature and energy density, making it difficult for the temperature and energy density of the power battery to be within a relatively optimal range. 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 energy density and temperature.

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

[0006] The box body is provided with a first accommodating cavity; the first accommodating cavity is provided with a first inner wall and a second inner wall connected to the outer periphery of the first inner wall; on the projection plane perpendicular to the first direction, the area of ​​the orthographic projection of the first inner wall is the first area;

[0007] A plurality of battery cell assemblies are arranged in the first accommodation cavity along the second direction and arranged along the first inner wall along the first direction; the battery cell assembly includes N battery cells arranged along the third direction, the maximum dimension of the battery cell along the third direction is the first dimension, the maximum dimension of the battery cell along the second direction is the second dimension, the second dimension is ≤400 mm, and at least one end of the battery cell along the second direction is provided with an electrode terminal;

[0008] Wherein, N≥1, N is a positive integer, and the first area / (N*first size*second size)∈[3,8]; the first direction, the second direction and the third direction are perpendicular to each other.

[0009] The battery device provided by the embodiment of the present application includes a box body and a plurality of battery cell assemblies arranged in a first accommodation cavity of the box body along a second direction. The battery cell assembly and the first inner wall of the first accommodation cavity are arranged along the first direction. The area of ​​the orthographic projection of the first inner wall is the first area. The battery cell assembly includes N battery cells arranged along a third direction. The maximum size of the battery cell along the third direction is the first size. The maximum size of the battery cell along the second direction is the second size. The second size is ≤400 mm. The battery cell is provided with electrode terminals at both opposite ends along the second direction. The first area / (N*first size*second size)∈[3,8] makes the number of battery cell assemblies in the first accommodation cavity ∈[3,8], so that the battery cell has a more suitable maximum size and number in the second direction, so that it can be arranged more compactly in the first accommodation cavity of the box body. In this way, on the one hand, the battery cell has a more suitable length of the current path, which helps to make the 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, the battery cells have a higher grouping efficiency in the second direction, so that the multiple battery cell assemblies can fully utilize the first accommodation cavity of the box in the second direction, which helps to improve the space utilization of the battery device and improve the energy density of the battery device. Therefore, the battery device can take into account both temperature and energy density, so that both temperature and energy density can be within a relatively optimal range.

[0010] In some embodiments, the second dimension is ≥ 200 mm.

[0011] In this way, the battery cell can have a current path of a more appropriate length, which can improve the problem of excessive heat generation of the battery cell due to the excessively large current path, so that the heat generation of the battery cell is within a more optimal range, and thus the temperature of the battery cell can be within a more optimal range, which is beneficial to extending the service life of the battery device.

[0012] 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.

[0013] By adopting the above technical solution, the battery monomers can be arranged in the first accommodating cavity of the box body according to requirements, which can improve the flexibility and convenience of arranging the battery monomers in the box body.

[0014] In some embodiments, the second direction is the walking direction of the electric device having the battery device; or, the third direction is the walking direction of the electric device having the battery device.

[0015] By adopting the above technical solution, the battery cells can be arranged in the first accommodating cavity of the box body according to the requirements, which can improve the flexibility and convenience of arranging the battery device on the electrical device.

[0016] In some embodiments, the second direction is a walking direction of the electric device having the battery device, and N∈[2, 16].

[0017] Such arrangement results in a smaller number of battery cells in the battery cell assembly, and thus the arrangement flexibility of the battery cells on the electrical device is higher.

[0018] In some embodiments, the second direction is a moving direction of the electric device having the battery device, and in the second direction, the minimum gap between the electrode terminals of two adjacent battery cells is ≥2 mm.

[0019] By adopting the above technical solution, in the second direction, the first gap between two adjacent battery cells can be used to arrange partition components, insulating glue, busbar components, etc., so that in the moving direction of the electrical device, the partition components, etc. can achieve certain buffering protection for the two adjacent battery cells.

[0020] In some embodiments, the third direction is a walking direction of the electric device having the battery device, and N∈[2,30].

[0021] Such arrangement enables a larger number of battery cells in the battery cell assembly, and thus allows for greater flexibility in the arrangement of the battery cells on the electrical device.

[0022] In some embodiments, the third direction is the walking direction of the electric device having the battery device, N≥2, and in the third direction, the gap between the electrode terminals of two adjacent battery cells at the same end in the second direction is ≥5 mm.

[0023] By adopting the above technical solution, in the third direction, a partition component, insulating glue, etc. can be arranged between two adjacent battery cells, so that in the moving direction of the electrical device, the second gap and the partition component therein can provide a greater degree of buffering protection for the battery cells.

[0024] In some embodiments, the battery cell has first surfaces at both opposite ends along the second direction, and the electrode terminals extend out of the first surfaces;

[0025] The battery cell is provided with a second surface on two opposite sides along the third direction, and the area of ​​the first surface is smaller than the area of ​​the second surface.

[0026] By making the area of ​​the first surface smaller than the area of ​​the second surface, the maximum dimension of the monomer body along the second direction is larger than the maximum dimension of the monomer body along the third direction, and the maximum dimension of the battery monomer along the second direction (i.e., the second dimension) is larger than the maximum dimension of the battery monomer along the third direction (i.e., the first dimension), that is, the length of the battery monomer is larger than the thickness of the battery monomer. Such an arrangement can make the battery monomer have a better heat dissipation capacity, which helps to reduce the temperature of the battery monomer.

[0027] In some embodiments, the first size ∈ [10 mm, 45 mm].

[0028] Such arrangement enables the battery cells to have a more suitable size along the third direction. Thus, on the one hand, the battery cells can have a better heat dissipation capability due to the size design of the battery cells along the third direction, so that the temperature of the battery cells can be within a more optimal range, which is beneficial to prolonging the service life of the battery device. On the other hand, when the maximum size of the first inner wall along the third direction (i.e., the fourth size) is predetermined, because the battery cells have a more suitable size along the third direction, the battery cell assembly can have a more suitable number of battery cells, i.e., the value of N is more suitable, so that the battery cell assembly can have a higher grouping efficiency in the third direction, which helps to improve the space utilization of the battery device and helps to improve the energy density of the battery device. Therefore, by adopting the above technical solution, it is helpful to make the temperature and energy density of the battery device both within a more optimal range.

[0029] In some embodiments, the first size ∈ [15 mm, 30 mm].

[0030] By adopting the above technical solution, the battery cell has a more suitable size along the third direction, which helps to keep the temperature and energy density of the battery device within a more optimal range.

[0031] In some embodiments, the battery cell has a third surface at both opposite ends along the first direction, and the area of ​​the second surface is greater than the area of ​​the third surface.

[0032] By making the area of ​​the second surface larger than the area of ​​the third surface, the maximum dimension of the battery body along the first direction is larger than the maximum dimension of the battery body along the third direction, that is, the third dimension hereinafter is larger than the first dimension, that is, the width of the battery cell is larger than the thickness of the battery cell. With such a configuration, the battery cell can have a better heat dissipation capability to reduce the maximum temperature of the battery cell.

[0033] In some embodiments, the maximum dimension of the battery cell along the first direction is a third dimension, and the third dimension ∈ [60 mm, 160 mm].

[0034] By adopting the above technical solution, the battery cell has a more suitable maximum size in the first direction, which helps the battery cell have a better heat dissipation capacity to reduce the temperature of the battery cell. In addition, this arrangement makes the battery cell a short-blade battery.

[0035] In some embodiments, the third dimension ∈ [80 mm, 130 mm].

[0036] By adopting the above technical solution, the battery cell has a more suitable maximum size in the first direction, which helps to make the battery cell have better heat dissipation ability to reduce the temperature of the battery cell.

[0037] In some embodiments, the box body includes a box body and a beam structure arranged in the box body, the beam structure divides the internal space of the box body into a first accommodating cavity and a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are distributed along a third direction, and part of the second inner wall is arranged on the beam structure.

[0038] By adopting the above technical solution, the box body of the battery device can be divided into a first accommodating chamber and a second accommodating chamber.

[0039] In some embodiments, the box body includes two beam structures arranged in the box body at intervals along a third direction, and the two beam structures and the box body are arranged to form a first accommodating cavity and two second accommodating cavities; in the third direction, the first accommodating cavity is arranged between the two second accommodating cavities.

[0040] By adopting the above technical solution, multiple battery cell assemblies are arranged in the first accommodating cavity and are limited between the two beam structures along the third direction. In this way, the two beam structures can resist the expansion of the battery cells in the third direction.

[0041] In some embodiments, at least one group of electrode terminals are disposed at opposite ends of the battery cell in the second direction, and each group of electrode terminals includes a positive electrode terminal and a negative electrode terminal spaced apart along the first direction.

[0042] 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, reducing the heat generated by the battery cell, and thus reducing the temperature of the battery cell.

[0043] In some embodiments, at least one end of the battery cell along the second direction is provided with a pressure relief mechanism spaced apart from the electrode terminal.

[0044] By arranging the pressure relief mechanism at at least one end of the battery cell along the second direction, the first accommodation cavity of the box body 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 assembly along the first direction, and on this basis, the pressure relief mechanism can effectively achieve the pressure relief effect of the battery cell.

[0045] In some embodiments, in the second direction, insulating glue is provided between the battery cells of two adjacent battery cell assemblies;

[0046] And / or, N≥2, and in the third direction, insulating glue is provided between two adjacent battery cells.

[0047] 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 multiple battery cell assemblies 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.

[0048] 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.

[0049] 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.

[0050] In some embodiments, the pressure relief mechanism and the electrode terminal are spaced apart along a first direction; in the first direction, the insulating glue exceeds the electrode terminal and is spaced apart from the pressure relief mechanism.

[0051] 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.

[0052] In some embodiments, in the second direction, a partition component is disposed between the battery cells of two adjacent battery cell assemblies;

[0053] And / or, N≥2, and in the third direction, a partition component is provided between two adjacent battery cells.

[0054] 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 array, reduce the adverse effects of external factors such as vibration on the battery cell assembly, and effectively enhance the adaptability of the battery device.

[0055] In some embodiments, the housing includes a thermal management component disposed at at least one end of the battery cell assembly along the first direction, and the thermal management component is connected to the battery cell to adjust the temperature of the battery cell.

[0056] By providing thermal management components at both opposite ends of the battery cell assembly along the first direction, the thermal management components at both opposite ends of the battery cell assembly along the first direction can perform thermal management on the battery cell assembly. In this way, on the one hand, the thermal management efficiency of the battery cell assembly can be improved, thereby helping to reduce the temperature of the battery cell. On the other hand, it helps to improve the temperature uniformity of multiple battery cell assemblies, thereby helping to extend the service life of the battery device.

[0057] In a second aspect, an embodiment of the present application provides an electrical device, including a battery device.

[0058] 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 both energy density and temperature, thereby improving the performance and reliability of the battery device, which helps to improve the performance and reliability of the electrical device.

[0059] 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

[0060] 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.

[0061] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application;

[0062] Figure 2 An exploded view of a battery device provided for some embodiments of the present application;

[0063] Figure 3 Schematic diagram of a battery device provided in some other embodiments of the present application;

[0064] Figure 4 for Figure 3 An exploded view of the battery unit provided;

[0065] Figure 5 A three-dimensional structural diagram of a battery cell of a battery device provided in some embodiments of the present application;

[0066] Figure 6 for Figure 3 A partial schematic diagram of a box of a battery device is provided;

[0067] Figure 7 for Figure 3 A partial schematic diagram of a battery device is provided;

[0068] Figure 8 for Figure 7 The enlarged view of point A in the middle;

[0069] Fig. 9 A schematic diagram of a battery cell assembly of a battery device provided in some embodiments of the present application;

[0070] Fig.10 for Figure 3 Sectional view along BB;

[0071] Fig.11 for Fig.10 A partial enlarged view of

[0072] Fig.12 A partial schematic diagram of a battery device provided in some other embodiments of the present application;

[0073] Fig.13 for Fig.12 Enlarged view of point C in the middle;

[0074] Fig.14 for Figure 3 A three-dimensional structural diagram of multiple battery cell assemblies and a busbar component of a battery device is provided.

[0075] Among them, the reference numerals in the figure are:

[0076] 3000-vehicle; 3100-controller; 3200-motor; 10-battery device; 1-battery monomer assembly; 101-first surface; 102-second surface; 103-third surface; 11-battery monomer; 111-electrode terminal; 111a-positive electrode terminal; 111b-negative electrode terminal; 112-monomer body; 1121-housing; 11211-housing; 11212-end cover; 113-pressure relief mechanism; 2-box; 201-first accommodating chamber; 2011-first inner wall; 2012-second inner wall; 201 21-first partition wall; 20122-second partition wall; 202-second accommodating chamber; 21-first part; 22-second part; 211-box body; 2111-thermal management component; 212-beam structure; 213-partition component; 3-collecting component; S-first area; L1-first dimension; L2-second dimension; L3-third dimension; L4-fourth dimension; L5-fifth dimension; H1-first gap; H2-second gap; a-length direction; b-width direction; c-travel direction; Z-first direction; Y-second direction; X-third direction. DETAILED DESCRIPTION

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] A power battery generally may include a housing and a plurality of battery cells, and the battery cells are arranged in the housing.

[0088] In some cases, based on the arrangement of the battery cells in the box, the power battery can have a higher space utilization rate, so that it can have a higher energy density. This will inevitably cause the battery cells to heat up significantly during use, so that the temperature of the battery cells is high, affecting the service life of the power battery. In other cases, by adjusting the arrangement of the battery cells in the box, the temperature rise of the battery cells can be reduced to reduce the temperature of the battery cells and extend the service life of the power battery. 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 the temperature and energy density, making it difficult for the temperature and energy density of the power battery to be within a relatively optimal range.

[0089] For example, along the approximate direction of the overcurrent path of the battery cell, the maximum size of the battery cell can be set very large to reduce the number of battery cells in this direction, thereby saving the arrangement of parts between adjacent battery cells in this direction, saving the arrangement of the battery cell shell in this direction, and improving the space waste problem caused by the arrangement tolerance between adjacent battery cells. In this way, the space utilization rate of the power battery can be improved to improve the energy density of the power battery. However, this makes the overcurrent path of the battery cell very long, and the heat generation of the battery cell increases accordingly, which inevitably causes the battery cell to heat up greatly, so that the temperature of the battery cell is high, affecting the service life of the power battery.

[0090] For example, along the approximate direction of the overcurrent path of the battery cell, the maximum size of the battery cell can be set very small to increase the number of battery cells in this direction, so that the overcurrent path of the battery cell can be reduced to reduce the heat generated by the battery cell, thereby reducing the temperature rise of the battery cell and lowering the temperature of the battery cell. However, this requires adaptive arrangement of adjacent battery cells in this direction, which will inevitably reduce the grouping efficiency of the battery cell in this direction, thereby reducing the space utilization of the power battery, thereby reducing the energy density of the power battery.

[0091] Based on the above considerations, the embodiment of the present application provides a battery device and an electric device, wherein the battery device includes a box body and a plurality of battery cell assemblies arranged in a first accommodation cavity of the box body along a second direction, the battery cell assembly and the first inner wall of the first accommodation cavity are arranged along the first direction, the area of ​​the orthographic projection of the first inner wall is the first area, the battery cell assembly includes N battery cells arranged along a third direction, the maximum size of the battery cell along the third direction is the first size, the maximum size of the battery cell along the second direction is the second size, the second size is ≤400mm, the battery cell is provided with electrode terminals at both opposite ends along the second direction, and the first area / (N*first size*second size)∈[3,8], so that the number of battery cell assemblies in the first accommodation cavity is∈[3,8], so that the battery cell has a more suitable maximum size and number in the second direction, so that it can be arranged more compactly in the first accommodation cavity of the box body. In this way, on the one hand, the battery cell has a more suitable length of the overcurrent path, which helps to make the 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, the battery cells have a higher grouping efficiency in the second direction, so that the multiple battery cell assemblies can fully utilize the first accommodation cavity of the box in the second direction, which helps to improve the space utilization of the battery device and improve the energy density of the battery device. Therefore, the battery device can take into account both temperature and energy density, so that both temperature and energy density can be within a relatively optimal range.

[0092] It should be noted that although the battery device provided in the embodiment of the present application is developed based on the problem that the temperature and energy density of the power battery are difficult to balance, its application scenario is not limited to the power battery. It can be understood that the battery device can be a power battery or an energy storage battery.

[0093] 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.

[0094] In some embodiments, the battery device 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 formed into one or more battery modules first and then accommodated in the housing.

[0095] When there are multiple battery cells, the multiple battery cells can be arranged and fixed to form a battery module. As an example, the multiple battery cells can be fixed to form a battery module by cable ties, etc. As an example, the multiple battery cells can also be fixed to form a battery module by end plates, side plates, etc.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] For ease of description, the embodiments of the present application are described using the electrical device being a vehicle as an example.

[0102] 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.

[0103] 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 .

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] In some embodiments, please combine Figure 1 , Figure 2 and Figure 4The 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.

[0109] 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.

[0110] 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.

[0111] In the battery cell 11 , the number of electrode assemblies may be one or more.

[0112] In some cases, the electrode assembly may also be referred to as a bare cell, a wound body, a stacked body, etc.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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 .

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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 .

[0124] Please also read Figures 4 to 11 , and combined with other drawings. Among them, Figure 6 for Figure 3 A partial schematic diagram of the box body 2 of the battery device 10 is provided, specifically a schematic diagram of the first part 21 of the box body 2 in the first direction Z, wherein the shaded part is the first area S. 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 in the first direction Z. Figure 8 for Figure 7 Enlarged view of point A in the middle. Fig. 9The schematic diagram of the battery cell assembly 1 of the battery device 10 provided in some embodiments of the present application is specifically a schematic diagram of the battery cell assembly 1 from the perspective of the first direction Z. Fig.10 for Figure 3 Cross-sectional view along BB, Fig.11 for Fig.10 A partial enlarged view. The battery device 10 provided in the embodiment of the present application includes a box body 2 and a plurality of battery cell assemblies 1. The box body 2 is provided with a first accommodating chamber 201. The first accommodating chamber 201 is provided with a first inner wall 2011 and a second inner wall 2012, and the second inner wall 2012 is connected to the outer periphery of the first inner wall 2011. On the projection plane perpendicular to the first direction Z, the area of ​​the orthographic projection of the first inner wall 2011 is the first area S. The plurality of battery cell assemblies 1 are arranged in the first accommodating chamber 201 along the second direction Y, and are arranged along the first direction Z with the first inner wall 2011. The battery cell assembly 1 includes N battery cells 11 arranged along a third direction X, the maximum dimension of the battery cell 11 along the third direction X is a first dimension L1, the maximum dimension of the battery cell 11 along the second direction Y is a second dimension L2, the second dimension L2≤400mm, and at least one end of the battery cell 11 along the second direction Y is provided with an electrode terminal 111. Wherein, N≥1, N is a positive integer, and the first area S / (N*first size L1*second size L2)∈[3,8]. Wherein, the first direction Z is perpendicular to the second direction Y, the first direction Z is perpendicular to the third direction X, and the second direction Y is perpendicular to the third direction X.

[0125] The first accommodating cavity 201 refers to the space in the box body 2 for accommodating the battery cell 11, and the first inner wall 2011 and the second inner wall 2012 are both inner wall surfaces of the first accommodating cavity 201. As an example, the first accommodating cavity 201 is disposed in the first portion 21 of the box body 2, and the first inner wall 2011 and the second inner wall 2012 are both disposed on the first portion 21 of the box body 2.

[0126] One side inner wall of the first accommodating cavity 201 along the first direction Z is the first inner wall 2011. As an example, the first inner wall 2011 is roughly square, and the second inner wall 2012 includes two first partition walls 20121 and two second partition walls 20122. The two first partition walls 20121 are arranged oppositely along the second direction Y, and are respectively arranged at two opposite sides of the first inner wall 2011 along the second direction Y. The two second partition walls 20122 are arranged oppositely along the third direction X, and are respectively arranged at two opposite sides of the first inner wall 2011 along the third direction X. Based on this, the second inner wall 2012 is connected to the periphery of the first inner wall 2011.

[0127] Among them, Figure 6As shown, the maximum dimension of the first partition wall 20121 in the third direction X is a fourth dimension L4, and the maximum dimension of the second partition wall 20122 in the second direction Y is a fifth dimension L5.

[0128] In the second direction Y, the battery cell assembly 1 is disposed between the two first partition walls 20121. In the third direction X, the battery cell assembly 1 is disposed between the two second partition walls 20122. In addition, the battery cell assembly 1 and the first inner wall 2011 are arranged along the first direction Z. Based on this, a plurality of battery cell assemblies 1 are disposed in the first accommodation chamber 201.

[0129] It should be noted that the view of the projection plane perpendicular to the first direction Z is Figure 6 Based on this, on the projection plane perpendicular to the first direction Z, the orthographic projection of the first inner wall 2011 can refer to Figure 6 Among them, on the projection plane perpendicular to the first direction Z, the area of ​​the orthographic projection of the first inner wall 2011 = the fourth dimension L4*the fifth dimension L5.

[0130] Multiple battery cell assemblies 1 are arranged in the first accommodating cavity 201 along the second direction Y, and are arranged along the first direction Z with the first inner wall 2011, which means that multiple battery cell assemblies 1 are arranged in the first accommodating cavity 201, multiple battery cell assemblies 1 are arranged along the second direction Y, and each battery cell assembly 1 is arranged along the first direction Z with the first inner wall 2011. Among them, the battery cell assembly 1 is arranged in the first accommodating cavity 201, which does not mean that the battery cell assembly 1 is completely located in the first accommodating cavity 201. It can be understood that at least part of the battery cell assembly 1 is accommodated in the first accommodating cavity 201.

[0131] The battery cell assembly 1 includes N battery cells 11 arranged along the third direction X, which means that the battery cell assembly 1 includes N battery cells 11, and when N ≥ 2, in the battery cell assembly 1, the N battery cells 11 are arranged along the third direction X. Wherein, N may be 1 or greater than 1, for example, may be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, etc.

[0132] It can be understood that the battery cell 11 is provided with an electrode terminal 111 at one end thereof along the first direction Y; or Figure 5 As shown, the battery cell 11 is provided with electrode terminals 111 at two opposite ends along the first direction Y.

[0133] 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 arranged at one end of the cell body 112 along the second direction Y; or Figure 5As shown, a plurality of electrode terminals 111 are respectively arranged at opposite ends of the monomer body 112 along the second direction Y. 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. The second direction Y is the approximate distribution direction of the monomer body 112 and the electrode terminals 111. It should be noted that the maximum size of the battery monomer 11 along the second direction Y refers to the maximum size of the whole formed by the monomer body 112 and the electrode terminals 111 in the second direction Y, that is, when the electrode terminals 111 are arranged at opposite ends of the monomer body 112 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 second size L2.

[0134] 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.

[0135] The second size L2≤400mm, and specifically can be 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, etc.

[0136] The maximum dimension of the battery cell 11 along the third direction X refers to the maximum dimension of the cell body 112 of the battery cell 11 along the third direction X, that is, the maximum dimension of the housing 1121 along the third direction X, which is the first dimension L1.

[0137] By the first area S / (N*first size L1*second size L2)∈[3,8], the number of battery cell assemblies 1 can be approximately M, M∈[3,8], and M is a positive integer. That is, M can be 3, 4, 5, 6, 7 or 8. It can be understood that the M battery cell assemblies 1 can constitute M rows and N columns of battery cells 11, each row includes N battery cells 11, and each column includes approximately M battery cells 11.

[0138] The first direction Z is perpendicular to the second direction Y, the first direction Z is perpendicular to the third direction X, and the second direction Y is perpendicular to the third direction X, which means that they are approximately perpendicular, that is, a certain deviation is allowed.

[0139] The battery device 10 provided in the embodiment of the present application includes a box body 2 and a plurality of battery cell assemblies 1, wherein the plurality of battery cell assemblies 1 are arranged in a first accommodating cavity 201 of the box body 2 along a second direction Y, the battery cell assembly 1 and a first inner wall 2011 of the first accommodating cavity 201 are arranged along a first direction Z, an area of ​​a positive projection of the first inner wall 2011 is a first area S, the battery cell assembly 1 includes N battery cells 11 arranged along a third direction X, a maximum dimension of the battery cell 11 along the third direction X is a first dimension L1, a maximum dimension of the battery cell 11 along the second direction Y is a second dimension L2, and a maximum dimension of the battery cell 11 along the second direction Y is a second dimension L3. The second dimension L2≤400mm, the battery cell 11 is provided with electrode terminals 111 at both opposite ends along the second direction Y, and the first area S / (N*first dimension L1*second dimension L2)∈[3,8], so that the number of battery cell assemblies 1 in the first accommodating cavity 201∈[3,8]. It can be understood that the number of battery cells 11 in each column∈[3,8], so that when the maximum dimension of the first inner wall 2011 along the second direction Y is predetermined, the battery cell 11 can have a more suitable maximum dimension and quantity in the second direction Y, so as to be arranged more compactly in the first accommodating cavity 201 of the box body 2.

[0140] With such arrangement, on the one hand, the battery cell 11 has a relatively suitable maximum size in the second direction Y, so that the battery cell 11 can have a current path of relatively suitable length, which helps to improve the problem of very large heat generation of the battery cell 11 due to the excessively large current path, helps to reduce the temperature rise of the battery cell 11, and lowers the temperature of the battery cell 11, so that the heat generation of the battery cell 11 is within a more optimal range, thereby making the temperature of the battery cell 11 within a more optimal range, which is beneficial to extending the service life of the battery device 10. On the other hand, each column of battery cells 11 has a relatively suitable number of battery cells 11, so that 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 battery cells 11 adjacent to each other in the second direction Y, saving the shells 1121 at the opposite ends of the battery cells 11 along the second direction Y, reducing the space waste problem caused by the arrangement tolerance between the battery cells 11 adjacent to each other in the second direction Y, etc., so that the first accommodating cavity 201 of the box body 2 can be fully utilized by the multiple battery cell assemblies 1 in the second direction Y, which helps to improve the space utilization of the battery device 10 and the energy density of the battery device 10. Therefore, by adopting the above technical solution, the temperature and energy density of the battery device 10 can be within a relatively optimal range, so that the battery device 10 can take into account the advantages of low temperature and high energy density, and improve the performance and reliability of the battery device 10. In this way, the battery device 10 can have high-efficiency fast charging capability.

[0141] It should be supplemented here that, by adopting the above technical solution, each column of battery cells 11 can be arranged relatively compactly in the first accommodation cavity 201 of the box body 2 along the second direction Y, so that multiple battery cell assemblies 1 can be arranged relatively compactly in the first accommodation cavity 201 of the box body 2 along the second direction Y. In this way, on the one hand, the battery cells 11 of the multiple battery cell assemblies 1 can be relatively compact along the second direction Y, and the battery cells 11 and the second inner wall 2012 can be relatively compact, 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 of the multiple battery cell assemblies 1 and between the battery cells 11 and the second inner wall 2012 will not be too compact, so that the battery cells 11 are easy to dissipate heat, which helps to reduce the temperature of the battery cells 11.

[0142] 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 .

[0143] 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 first direction Z can be roughly the width extension direction of the battery cell 11, the second direction Y can be roughly the length extension direction of the battery cell 11, and the third direction X can be roughly the thickness extension direction of the battery cell 11.

[0144] In some embodiments, please refer to Figures 7 to 11 , and in combination with other drawings. The second dimension L2 ≥ 200 mm.

[0145] It can be understood that the second size L2∈[200mm, 400mm], that is, 200mm≤second size L2≤400mm, and the second size L2 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 second dimension L2) of the battery cell 11 in the second direction Y has a certain value range. In this way, the battery cell 11 can have a current 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 excessively large current path, so that the heat generated by the battery cell 11 is within a better range, and thus the temperature of the battery cell 11 can be within a better range, which is conducive to extending the service life of the battery device 10.

[0147] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 6 , Figure 7 and Fig.11 , and in combination with other drawings. 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 .

[0148] 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.

[0149] 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.

[0150] Among some possible designs, such as Figure 7 As 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 third 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 third direction X may be the width of the battery device 10.

[0151] Or, in some other possible designs, such as Fig.12 As shown. Among them, Fig.12 Partial schematic diagram of a battery device 10 provided in some other embodiments of the present application. 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 third 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 third direction X may be the length of the battery device 10.

[0152] By adopting the above technical solution, the battery cell 11 can be arranged in the first accommodation cavity 201 of the box body 2 according to needs, which can improve the flexibility and convenience of arranging the battery cell 11 in the box body 2.

[0153] 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 .

[0154] As an example, when the electric device is a vehicle 3000 , the moving direction c of the electric device is the length direction a of the vehicle 3000 .

[0155] 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.

[0156] In some embodiments, see Fig.12 , and in combination with other drawings. The third direction X is the walking direction c of the electric device having the battery device 10 .

[0157] It can be understood that when the third direction X is the length direction a of the battery device 10, Fig.12 As shown, the length direction a of the battery device 10 is the travel direction c of the electric device. The second direction Y is perpendicular to 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 .

[0158] When the third 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 is perpendicular to the width direction b of the battery device 10, for example, the second direction Y can be the length direction a of the electric device.

[0159] By adopting the above technical solution, the battery cell 11 can be arranged in the first accommodation cavity 201 of the box body 2 according to needs, which can improve the flexibility and convenience of arranging the battery device 10 on the electrical device.

[0160] In some embodiments, see Figure 7 , and in combination with other figures. The second direction Y is the walking direction c of the electric device having the battery device 10, and N∈[2,16].

[0161] It will be appreciated that N may be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or 16.

[0162] It should be noted that the size of the battery device 10 along the travel direction c of the electric device is generally the length of the battery device 10 , the second direction Y is generally the length of the battery device 10 , and the third direction X is generally the width of the battery device 10 .

[0163] This arrangement allows the number of battery cells 11 in the battery cell assembly 1 to be relatively small, so that the arrangement of the battery cells 11 on the electrical device is more flexible.

[0164] In some embodiments, please refer to Figure 7 and Figure 8 , and in combination with other drawings. The second direction Y is the moving direction c of the electric device having the battery device 10 , and in the second direction Y, the minimum gap between the electrode terminals 111 of two adjacent battery cells 11 is ≥2 mm.

[0165] For the convenience of description, it is defined that the minimum gap between the electrode terminals 111 of two adjacent battery cells 11 in the second direction Y is a first gap H1 .

[0166] For ease of description, it is defined that in the second direction Y, two adjacent battery cells 11 are respectively a first battery cell 11 and a second battery cell 11. In the second direction Y, the gap between the electrode terminal 111 of the first battery cell 11 close to the second battery cell 11 and the electrode terminal 111 of the second battery cell 11 close to the first battery cell 11 is the above-mentioned first gap H1.

[0167] The first gap H1≥2mm, and can specifically be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, etc.

[0168] By adopting the above technical solution, in the second direction Y, the first gap H1 between two adjacent battery cells 11 can be used to arrange the partition component 213, insulating glue, busbar component 3, etc., so that in the walking direction c of the electrical device, the partition component 213, etc. can achieve a certain buffer protection for the two adjacent battery cells 11.

[0169] In some embodiments, see Fig.12 , and in combination with other drawings. The third direction X is the walking direction c of the electric device having the battery device 10, and N∈[2,30].

[0170] It will be appreciated that N may be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30.

[0171] It should be noted that the dimension of the battery device 10 along the travel direction c of the electric device is generally the length of the battery device 10 , the third direction X is generally the length of the battery device 10 , and the second direction Y is generally the width of the battery device 10 .

[0172] Such arrangement enables the battery cell assembly 1 to have a large number of battery cells 11. Thus, the battery cells 11 can be arranged more flexibly on the electrical device.

[0173] In some embodiments, please refer to Fig.12 and Fig.13 , and combined with other drawings. Among them, Fig.13 for Fig.12 The third direction X is the running direction c of the electric device having the battery device 10 , N≥2, and in the third direction X, the gap between the electrode terminals 111 of two adjacent battery cells 11 at the same end in the second direction Y is ≥5mm.

[0174] For the convenience of description, it is defined that in the third direction X, the gap between the electrode terminals 111 of two adjacent battery cells 11 at the same end in the second direction Y is the second gap H2.

[0175] The second gap H2≥5mm, and can be specifically 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, etc.

[0176] It should be noted that the surface of the battery cell 11 in the third direction X is generally the surface with the largest area of ​​the battery cell 11 , that is, the large surface.

[0177] By adopting the above technical solution, in the third direction X, a partition component 213, insulating glue, etc. can be arranged between two adjacent battery cells 11, so that in the walking direction c of the electrical device, the second gap H2 and the partition component 213 therein can provide a greater degree of buffering protection for the battery cells 11.

[0178] In some embodiments, please refer to Figures 5 to 11 , and in combination with other drawings. The battery cell 11 has a first surface 101 at both opposite ends along the second direction Y, and the electrode terminal 111 extends from the first surface 101. The battery cell 11 has a second surface 102 at both opposite sides along the third direction X, and the area of ​​the first surface 101 is smaller than the area of ​​the second surface 102.

[0179] 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 ends along the second direction Y, that is, the shell 1121 is provided with first surfaces 101 at both opposite ends along the second direction Y. The electrode terminal 111 extends from the first surface 101. The battery cell body 112 is provided with second surfaces 102 at both opposite sides along the third direction X, that is, the shell 1121 is provided with second surfaces 102 at both opposite sides along the third direction X. Among them, the first surface 101 and the second surface 102 are both outer surfaces of the battery cell body 112, that is, the outer surface of the shell 1121.

[0180] By making the area of ​​the first surface 101 smaller than the area of ​​the second surface 102, the maximum dimension of the monomer body 112 along the second direction Y is larger than the maximum dimension of the monomer body 112 along the third direction X, and thus the maximum dimension of the battery cell 11 along the second direction Y (i.e., the second dimension L2) is larger than the maximum dimension of the battery cell 11 along the third direction X (i.e., the first dimension L1), 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, which helps to reduce the temperature of the battery cell 11.

[0181] In some embodiments, please refer to Figures 5 to 9 , and in combination with other drawings. The first size L1∈[10mm, 45mm].

[0182] Specifically, 10 mm ≤ the first size L1 ≤ 45 mm, and the first size L1 may specifically be 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, etc.

[0183] Such arrangement enables the battery cell 11 to have a more suitable size along the third direction X. Thus, on the one hand, the battery cell 11 can have a better heat dissipation capability due to the size design of the battery cell 11 along the third direction X, so that the temperature of the battery cell 11 can be within a more optimal range, which is beneficial to prolonging the service life of the battery device 10. On the other hand, when the maximum dimension (i.e., the fourth dimension L4) of the first inner wall 2011 along the third direction X is predetermined, since the battery cell 11 has a relatively suitable dimension along the third direction X, the battery cell assembly 1 can have a relatively suitable number of battery cells 11, i.e., the value of N is relatively suitable, so that the battery cell assembly 1 can have a higher grouping efficiency in the third direction X, for example, it can save, but is not limited to, the parts between the battery cells 11 adjacent to each other along the third direction X, save the housing 1121 at the opposite ends of the battery cells 11 along the third direction X, and reduce the space waste caused by the arrangement tolerance between the adjacent battery cells 11, so as to help the battery cell assembly 1 to fully utilize the first accommodating cavity 201 of the box 2 in the third direction X, help improve the space utilization of the battery device 10, and help improve the energy density of the battery device 10. Therefore, by adopting the above technical solution, it is helpful to make the temperature and energy density of the battery device 10 both within a relatively optimal range.

[0184] In some embodiments, please refer to Figures 5 to 9 , and in combination with other drawings. The first size L1∈[15mm, 30mm].

[0185] Specifically, 15mm≤first size L1≤30mm, and the first size L1 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, etc.

[0186] By adopting the above technical solution, the battery cell 11 has a more suitable size along the third direction X. In this way, on the one hand, the battery cell 11 can have a better heat dissipation capacity, so that the temperature of the battery cell 11 can be within a more optimal range. On the other hand, when the maximum size of the first inner wall 2011 along the third direction X (i.e., the fourth size L4) is predetermined, the value of N can be within a more appropriate range, so that the battery cell assembly 1 can have a more appropriate grouping efficiency in the third direction X, so that the battery cell assembly 1 can fully utilize the first accommodating cavity 201 of the box 2 in the third direction X, which helps 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 helps to make the temperature and energy density of the battery device 10 both within a more optimal range.

[0187] In some embodiments, please refer to Figures 5 to 11 , and in combination with other drawings. The battery cell 11 has a third surface 103 at both opposite ends along the first direction Z, and the area of ​​the second surface 102 is larger than the area of ​​the third surface 103 .

[0188] The two opposite ends of the monomer body 112 along the first direction Z are provided with third surfaces 103 , that is, the two opposite ends of the shell 1121 along the first 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 .

[0189] By making the area of ​​the second surface 102 larger than the area of ​​the third surface 103, the maximum dimension of the cell body 112 along the first direction Z is larger than the maximum dimension of the cell body 112 along the third direction X, that is, the third dimension L3 mentioned below is larger than the first dimension L1, 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.

[0190] As an example, Figure 5 As shown, and in combination with other drawings. The third surface 103 is larger than the first surface 101. Based on this, the maximum dimension of the cell body 112 along the second direction Y is larger than the maximum dimension of the battery cell 11 along the first direction Z (i.e., the third dimension L3), and the maximum dimension of the battery cell 11 along the first direction Z is larger than the maximum dimension of the battery cell 11 along the third direction X (i.e., the first dimension L1), 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.

[0191] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11 , and in combination with other drawings. The maximum dimension of the battery cell 11 along the first direction Z is a third dimension L3, and the third dimension L3∈[60mm, 160mm].

[0192] The maximum dimension of the battery cell 11 along the first direction Z refers to the maximum dimension of the battery cell body 112 along the first direction Z, that is, the maximum dimension of the housing 1121 along the first direction Z, which is the third dimension L3.

[0193] Specifically, 60mm≤the third size L3≤160mm, and the third size L3 can be 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, etc.

[0194] By adopting the above technical solution, the battery cell 11 has a more suitable maximum size in the first direction Z, which helps the battery cell 11 to have a better heat dissipation capability to reduce the temperature of the battery cell 11. Moreover, this configuration makes the battery cell 11 a short-blade battery.

[0195] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11 , and combined with other drawings. The third dimension L3∈[80mm, 130mm].

[0196] Specifically, 80mm≤the third size L3≤130mm, and the third size L3 can be 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, etc.

[0197] By adopting the above technical solution, the battery cell 11 has a more suitable maximum size in the first direction Z, which helps to make the battery cell 11 have a better heat dissipation capability to reduce the temperature of the battery cell 11.

[0198] In some embodiments, please refer to Figure 4 , Figures 6 to 8 , Fig.10 and Fig.11 The box body 2 includes a box body 211 and a beam structure 212 disposed in the box body 211 . The beam structure 212 divides the internal space of the box body 211 into a first accommodating cavity 201 and a second accommodating cavity 202 . The first accommodating cavity 201 and the second accommodating cavity 202 are distributed along a third direction X, and a portion of the second inner wall 2012 is disposed on the beam structure 212 .

[0199] It can be understood that the second part 22 of the box body 2 includes a box body 211 and a beam structure 212 .

[0200] It can be understood that the beam structure 212 and the battery cell assembly 1 are distributed along the third direction X, so that the beam structure 212 can resist the expansion of the battery cell 11 along the third direction X. The beam structure 212 can be, but is not limited to, an expansion beam.

[0201] The inner wall of the beam structure 212 close to the battery cell assembly 1 along the third direction X is the second inner wall 2012. Specifically, the inner wall of the beam structure 212 close to the battery cell assembly 1 along the third direction X is the second partition wall 20122 of the second inner wall 2012.

[0202] The beam structure 212 may be a metal beam, such as but not limited to an aluminum alloy beam. The beam structure 212 may also be a non-metal structure, such as but not limited to an epoxy resin fiberglass board.

[0203] The second accommodating chamber 202 is a space for accommodating components such as a high voltage box. It can be understood that the first accommodating chamber 201 is mainly used to accommodate the battery cell 11, while the second accommodating chamber 202 is mainly used to accommodate other components except the battery cell 11.

[0204] By adopting the above technical solution, the box body 2 of the battery device 10 can be divided into a first accommodating chamber 201 and a second accommodating chamber 202 .

[0205] In some embodiments, please refer to Figure 4 , Figures 6 to 8 , Fig.10 and Fig.11 , and in combination with other drawings. The box body 2 includes two beam structures 212 spaced apart in the box body 211 along the third direction X, and the two beam structures 212 and the box body 211 are surrounded to form a first accommodating cavity 201 and two second accommodating cavities 202. In the third direction X, the first accommodating cavity 201 is arranged between the two second accommodating cavities 202.

[0206] It can be understood that the two beam structures 212 are arranged in the box body 211 at intervals along the third direction X, and the two beam structures 212 and the box body 211 are jointly arranged to form the first accommodation cavity 201. In addition, each beam structure 212 and the box body 211 are arranged to form the second accommodation cavity 202.

[0207] The two second partition walls 20122 of the second inner wall 2012 are respectively disposed on the two beam structures 212 , and the two first partition walls 20121 of the second inner wall 2012 are respectively disposed on the box body 211 .

[0208] By adopting the above technical solution, multiple battery cell assemblies 1 are arranged in the first accommodation cavity 201 and are located between the two beam structures 212 along the third direction X. In this way, the two beam structures 212 can resist the expansion of the battery cell 11 in the third direction X.

[0209] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11 At least one set of electrode terminals 111 is disposed at opposite ends of the battery cell 11 in the second direction Y. Each set of electrode terminals 111 includes positive electrode terminals 111a and negative electrode terminals 111b spaced apart in the first direction Z.

[0210] 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 first 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.

[0211] 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 first 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 first direction Z.

[0212] 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, reducing the heat generated by the battery cell 11, and thus reducing the temperature of the battery cell 11.

[0213] As an example, Figure 5 , Fig.10 , Fig.11 and Fig.14 As shown in the figure, and combined with other figures. Fig.14 for Figure 3 A three-dimensional structural diagram of multiple battery cell assemblies 1 and a busbar component 3 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 first direction Z.

[0214] like Fig.14As shown, and in combination with other drawings. The multiple battery cell assemblies 1 are respectively the first battery cell assembly 1, the second battery cell assembly 1, the third battery cell assembly 1... the second to last battery cell assembly 1, and the last battery cell assembly 1. As an example, in each battery cell assembly 1, the end electrode terminals 111 of the battery cells 11 along the second direction Y are connected in series through the busbar 3, so that each battery cell assembly 1 has two total positive electrodes and a total negative electrode. The two total positive electrodes of the first battery cell assembly 1 can be connected to serve as the total positive electrode of the whole composed of multiple battery cell assemblies 1. The two total negative electrodes of the first battery cell assembly 1 can be connected to the two total positive electrodes of the second battery cell assembly 1 through the busbar 3, and the two total negative electrodes of the second battery cell assembly 1 can be connected to the two total positive electrodes of the third battery cell assembly 1 through the busbar 3... and so on, the two total negative electrodes of the second to last battery cell assembly 1 can be connected to the two total positive electrodes of the last battery cell assembly 1 through the busbar 3, so that the first battery cell assembly 1, the second battery cell assembly 1, the third battery cell assembly 1... the second to last battery cell assembly 1 and the last battery cell assembly 1 are connected in series. The two total negative electrodes of the last battery cell assembly 1 are connected to serve as the total negative electrode of the whole composed of multiple battery cell assemblies 1.

[0215] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11 , and in combination with other drawings. The battery cell 11 further includes a pressure relief mechanism 113 .

[0216] 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.

[0217] The pressure relief mechanism 113 is disposed on the cell body 112 of the battery cell 11. 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.

[0218] 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.

[0219] 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 .

[0220] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11 , and in combination with other drawings. The pressure relief mechanism 113 is provided at at least one end of the battery cell 11 along the second direction Y, and the pressure relief mechanism 113 is spaced apart from the electrode terminal 111 .

[0221] 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 .

[0222] By arranging the pressure relief mechanism 113 at at least one end of the battery cell 11 along the second direction Y, the first accommodation cavity 201 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 2111 at the opposite ends of the battery cell assembly 1 along the first direction Z, and on this basis, the pressure relief mechanism 113 can effectively achieve the pressure relief effect of the battery cell 11.

[0223] In some embodiments, in the second direction Y, insulating glue is disposed between the battery cells 11 of two adjacent battery cell assemblies 1 .

[0224] It can be understood that insulating glue may be provided between two battery cells 11 adjacent to each other along the second direction Y.

[0225] 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.

[0226] In some embodiments, N≥2, and in the third direction X, insulating glue is disposed between two adjacent battery cells 11 .

[0227] It can be understood that insulating glue may be provided between two adjacent battery cells 11 along the third direction X.

[0228] 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.

[0229] 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 fully exert 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 multiple battery cell assemblies 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.

[0230] In some embodiments, insulating glue may be provided between the first inner wall 2011 and the adjacent battery cells 11 , and between the second inner wall 2012 and the adjacent battery cells 11 , so as to provide insulation protection for the battery cells 11 .

[0231] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11 , 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 .

[0232] 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.

[0233] In some embodiments, please refer to Figure 5 , Fig.10 and Fig.11, and in combination with other drawings. The pressure relief mechanism 113 and the electrode terminal 111 are spaced apart along the first direction Z. In the first direction Z, the insulating glue exceeds the electrode terminal 111 and is spaced apart from the pressure relief mechanism 113 .

[0234] It can be understood that at least a portion of the insulating glue is disposed on the electrode terminal 111 , the insulating glue extends beyond the electrode terminal 111 along the first direction Z, and the insulating glue and the pressure relief mechanism 113 are spaced apart along the first direction Z.

[0235] 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.

[0236] As an example, Figure 5 , Fig.10 and Fig.11 As shown in the figure, and in combination with other drawings. In the first direction Z, the electrode terminal 111 is spaced between the pressure relief mechanism 113 and the first inner wall 2011, and the insulating glue is provided on the first inner wall 2011, 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 first direction Z, and is spaced from the pressure relief mechanism 113 along the first direction Z.

[0237] It can be understood that the height of the insulating glue in the first direction Z is lower than the distance between the pressure relief mechanism 113 and the first inner wall 2011 in the first direction Z, so that the insulating glue can be filled between two adjacent battery cells 11 and avoid the pressure relief mechanism 113 .

[0238] In some embodiments, please refer to Figures 4 to 11 In the second direction Y, a partition component 213 is disposed between the battery cells 11 of two adjacent battery cell assemblies 1 .

[0239] 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.

[0240] In some embodiments, please refer to Figures 4 to 11 , and in combination with other drawings. N≥2, and in the third direction X, a partition component 213 is provided between two adjacent battery cells 11 .

[0241] It can be understood that a partition component 213 can be provided between two battery cells 11 adjacent along the third direction X. Specifically, a partition component 213 can be provided between the shells 1121 of two battery cells 11 adjacent along the third direction X, and a partition component 213 is provided between the electrode terminals 111 of two battery cells 11 adjacent along the third direction X. The partition component 213 separates the two battery cells 11 adjacent along the third direction X.

[0242] 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, it can improve the overall strength of the battery array, reduce the adverse effects of external factors such as vibration on the battery cell assembly 1, and effectively enhance the adaptability of the battery device 10.

[0243] In some embodiments, a partition member 213 may be further provided between the second inner wall 2012 and the adjacent battery cell 11, so that the partition member 213 separates the electrode terminal 111 of the battery cell 11 from the second inner wall 2012. 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.

[0244] 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.

[0245] 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 second inner wall 2012, a corresponding partition component 213 can be set according to different needs to meet the corresponding usage requirements of the battery array.

[0246] Among them, when the partition component 213 is a heat conductor, the partition is arranged between two adjacent battery cells 11 or between the second inner wall 2012 and an adjacent battery cell 11, which can conduct heat from 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.

[0247] Wherein, when the partition member 213 is a buffer, the buffer is arranged between two adjacent battery cells 11 or between the second inner wall 2012 and the adjacent battery cells 11. On the one hand, the buffer can absorb the tolerance between the two adjacent battery cells 11 and between the second inner wall 2012 and the battery cell 11 during the manufacturing process, so as to effectively install the battery cells 11. On the other hand, the buffer can provide a buffer between the two adjacent battery cells 11 and between the second inner wall 2012 and the battery cell 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.

[0248] 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 second inner wall 2012 and the adjacent battery cell 11. The partition plate is used to separate two adjacent battery cells 11 or the second inner wall 2012 and the adjacent battery cell 11, which can reduce the situation where the battery cell 11 is squeezed and damaged.

[0249] 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 second inner wall 2012 and the adjacent battery cell 11. The partition beam is used to separate two adjacent battery cells 11 or the second inner wall 2012 and the adjacent battery cell 11, which can reduce the situation where the battery cell 11 is squeezed and damaged.

[0250] In some embodiments, when insulating glue is provided between two adjacent battery cells 11 or between the second inner wall 2012 and an adjacent battery cell 11 , the insulating glue may be bonded and fixed to the partition component 213 .

[0251] In some embodiments, a pressure relief mechanism 113 is provided at at least one end of the electrode terminal 111 along the second direction Y. The pressure relief mechanism 113 and the partition component 213 are spaced apart and arranged opposite to each other, so that the partition component 213 can achieve a certain degree of protection against thermal runaway of the battery cell 11 .

[0252] In some embodiments, please refer to Figure 4 , Figure 6 , Fig.10 and Fig.11 , and in combination with other drawings. The housing 2 includes a heat management component 2111 disposed at at least one end of the battery cell assembly 1 along the first direction Z, and the heat management component 2111 is connected to the battery cell 11 to adjust the temperature of the battery cell 11 .

[0253] The thermal management component 2111 refers to a component that can achieve thermal management of the battery cell assembly 1. The thermal management component 2111 may be, but 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 2111. The heat exchange medium may be, but not limited to, water, oil, etc. The heat exchange medium may perform cooling management or heating management on the battery cell assembly 1.

[0254] By providing a thermal management component 2111 at at least one end of the battery cell assembly 1 along the first direction Z, the thermal management component 2111 at at least one end of the battery cell assembly 1 along the first direction Z can perform thermal management on the battery cell assembly 1 .

[0255] In some embodiments, please refer to Figure 4 , Figure 6 , Fig.10 and Fig.11 , and combined with other drawings. The battery cell assembly 1 is provided with heat management components 2111 at both opposite ends along the first direction Z. In this way, on the one hand, the thermal management efficiency of the battery cell assembly 1 can be improved, thereby helping to reduce the temperature of the battery cell 11. On the other hand, it helps to improve the temperature uniformity of multiple battery cell assemblies 1, thereby helping to extend the service life of the battery device 10.

[0256] It should be supplemented here that, of the two heat management components 2111 , one heat management component 2111 is disposed on the first portion 21 , and the other heat management component 2111 is disposed on the second portion 22 . The first inner wall 2011 may be disposed on the heat management component 2111 .

[0257] In some embodiments, the thermal management component 2111 may be provided with an inlet and an outlet, and the heat exchange medium may enter the flow channel of the thermal management component 2111 through the inlet and then flow out from the outlet to achieve a circulating flow.

[0258] In some embodiments, the distribution direction of the inlet and outlet of one thermal management component 2111 is substantially opposite to the distribution direction of the inlet and outlet of another thermal management component 2111. Such a configuration can effectively improve the heat exchange efficiency of the heat exchange medium in the thermal management component 2111 and the battery cell assembly 1, thereby helping to improve the thermal management efficiency of the battery cell assembly 1, helping to reduce the temperature of the battery cell 11, and also helping to improve the temperature uniformity of multiple battery cell assemblies 1.

[0259] The beam structure 212 may be provided with openings for correspondingly communicating with the inlet and outlet of the thermal management component 2111 , so as to facilitate the external heat exchange medium to enter and exit the thermal management component 2111 through the beam structure 212 .

[0260] 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.

[0261] 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 both energy density and temperature, thereby improving the performance and reliability of the battery device 10, which helps to improve the performance and reliability of the electrical device.

[0262] As one of the embodiments of this application, Figures 4 to 11 As shown, the battery device 10 includes a box body 2 and a plurality of battery cell assemblies 1. A first accommodating cavity 201 is provided in the box body 2, and the first accommodating cavity 201 is provided with a first inner wall 2011 and a second inner wall 2012, and the second inner wall 2012 is connected to the outer periphery of the first inner wall 2011. On the projection plane perpendicular to the first direction Z, the area of ​​the orthographic projection of the first inner wall 2011 is a first area S. A plurality of battery cell assemblies 1 are arranged in the first accommodating cavity 201, and the plurality of battery cell assemblies 1 are arranged along the second direction Y, and the battery cell assemblies 1 and the first inner wall 2011 are arranged along the first direction Z. The battery cell assembly 1 includes N battery cells 11 arranged along the third direction X, and the maximum dimension of the battery cell 11 along the third direction X is a first dimension L1, and the maximum dimension of the battery cell 11 along the second direction Y is a second dimension L2, and the second dimension L2∈[200mm, 400mm], and the battery cell 11 is provided with electrode terminals 111 at both opposite ends along the second direction Y. Wherein, N≥1, N is a positive integer, and the first area S / (N*first size L1*second size L2)∈[3,8]. Wherein, the first direction Z is perpendicular to the second direction Y, the first direction Z is perpendicular to the third direction X, and the second direction Y is perpendicular to the third direction X.

[0263] 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 is provided with a first accommodating cavity; the first accommodating cavity is provided with a first inner wall and a second inner wall connected to the outer periphery of the first inner wall; on the projection plane perpendicular to the first direction, the area of ​​the orthographic projection of the first inner wall is the first area; A plurality of battery cell assemblies are arranged in the first accommodating cavity along a second direction and arranged along the first inner wall along the first direction; the battery cell assembly comprises N battery cells arranged along a third direction, the maximum dimension of the battery cell along the third direction is a first dimension, the maximum dimension of the battery cell along the second direction is a second dimension, the second dimension is ≤400 mm, and at least one end of the battery cell along the second direction is provided with an electrode terminal; Wherein, N≥1, N is a positive integer, and the first area / (N*the first size*the second size)∈[3,8]; the first direction, the second direction and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that: The second size is ≥200 mm.

3. The battery device according to claim 1 or 2, 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.

4. The battery device according to any one of claims 1 to 3, characterized in that: The second direction is a walking direction of the electric device having the battery device; or the third direction is a walking direction of the electric device having the battery device.

5. The battery device according to claim 4, characterized in that: The second direction is the walking direction of the electric device having the battery device, and N∈[2, 16].

6. The battery device according to claim 4 or 5, characterized in that: The second direction is a moving direction of the electric device having the battery device, and in the second direction, a minimum gap between the electrode terminals of two adjacent battery cells is ≥2 mm.

7. The battery device according to claim 4, characterized in that: The third direction is the walking direction of the electric device having the battery device, and N∈[2,30].

8. The battery device according to claim 4 or 7, characterized in that: The third direction is the moving direction of the electric device having the battery device, N≥2, and in the third direction, the gap between the electrode terminals of two adjacent battery cells at the same end in the second direction is ≥5 mm.

9. The battery device according to any one of claims 1 to 8, characterized in that: The battery cell is provided with a first surface at both opposite ends along the second direction, and the electrode terminal extends out of the first surface; The battery cell is provided with a second surface on two opposite sides along the third direction, and the area of ​​the first surface is smaller than the area of ​​the second surface.

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

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

12. The battery device according to any one of claims 9 to 11, characterized in that: The battery cell is provided with a third surface at both opposite ends along the first direction, and the area of ​​the second surface is greater than that of the third surface.

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

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

15. The battery device according to any one of claims 1 to 14, characterized in that: The box body includes a box body and a beam structure arranged in the box body, the beam structure divides the internal space of the box body into the first accommodating cavity and the second accommodating cavity, the first accommodating cavity and the second accommodating cavity are distributed along the third direction, and part of the second inner wall is arranged on the beam structure.

16. The battery device according to claim 15, characterized in that: The box body includes two beam structures arranged in the box body at intervals along the third direction, and the two beam structures and the box body are arranged to form the first accommodating cavity and two second accommodating cavities; in the third direction, the first accommodating cavity is arranged between the two second accommodating cavities.

17. The battery device according to any one of claims 1 to 16, characterized in that: At least one group of electrode terminals is disposed at opposite ends of the battery cell in the second direction, and each group of electrode terminals includes a positive electrode terminal and a negative electrode terminal spaced apart along the first direction.

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

19. The battery device according to any one of claims 1 to 18, characterized in that: In the second direction, insulating glue is provided between the battery cells of two adjacent battery cell assemblies; And / or, N≥2, and in the third direction, insulating glue is provided between two adjacent battery cells.

20. The battery device according to claim 19, 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.

21. The battery device according to claim 20, characterized in that The pressure relief mechanism and the electrode terminal are spaced apart along the first direction; in the first direction, the insulating glue exceeds the electrode terminal and is spaced apart from the pressure relief mechanism.

22. The battery device according to any one of claims 1 to 21, characterized in that: In the second direction, a partition component is provided between the battery cells of two adjacent battery cell assemblies; And / or, N≥2, and in the third direction, a partition component is provided between two adjacent battery cells.

23. The battery device according to any one of claims 1 to 22, characterized in that: The box body includes a heat management component disposed at at least one end of the battery cell assembly along the first direction, and the heat management component is connected to the battery cell to adjust the temperature of the battery cell.

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

Images