Battery device and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a box body and a battery monomer array. The box body comprises two first inner walls opposite along a first direction, and the maximum distance of the two first inner walls along the first direction is a first size. The battery monomer array is arranged between the two first inner walls. The battery monomer array comprises battery monomers arranged in an M-row and N-column array. In the battery monomer array, each row of battery monomers is arranged along the first direction, and each column of battery monomers is arranged along a second direction. The maximum size of the battery monomers along the first direction is a second size, and at least one end of the battery monomers along the second direction is provided with an electrode terminal. M is greater than or equal to 1, N is greater than or equal to 1, M and N are both positive integers, and the second size*N / first size is within the range of [0.771, 0.947]. In this way, the battery device can have high heat dissipation capacity and high energy density.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and more particularly relates to a battery device and a power utilization device. BACKGROUND

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

[0003] In some cases, the power battery can have a high space utilization rate based on the arrangement of the battery monomers in the box body, so as to have a high energy density. However, this inevitably causes poor heat dissipation capacity of the battery monomers, so that the maximum temperature of the battery monomers is very high, affecting the service life of the power battery. In other cases, by adjusting the arrangement of the battery monomers in the box body, the heat dissipation capacity of the power battery can be improved, so as to reduce the maximum temperature of the battery monomers and prolong the service life of the power battery. However, this inevitably reduces the space utilization rate of the power battery, so as to reduce the energy density of the power battery. Thus, the power battery is difficult to balance the heat dissipation capacity and the energy density. SUMMARY

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

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising:

[0006] The box body includes two first inner walls oppositely arranged along a first direction, and the maximum distance of the two first inner walls along the first direction is a first size;

[0007] The battery monomer array is arranged between the two first inner walls; the battery monomer array includes battery monomers arranged in an M-row and N-column array; in the battery monomer array, each row of battery monomers is arranged along the first direction, and each column of battery monomers is arranged along a second direction; the maximum size of the battery monomers along the first direction is a second size, and at least one end of the battery monomers along the second direction is provided with an electrode terminal;

[0008] Wherein, M≥1, N≥1, M and N are positive integers; the second size*N / first size∈[0.771, 0.947]; the first direction intersects the second direction.

[0009] The battery device provided by the embodiments of the present application comprises a box body and a battery monomer array arranged in the box body. The battery monomer array comprises a plurality of battery monomers arranged in an M-row and N-column array. Each row of battery monomers is arranged along a first direction. The maximum size (second size) of the battery monomers along the first direction * the number (N) of battery monomers in each row / the maximum size (first size) of the two first inner walls along the first direction ∈ [0.771, 0.947]. That is, the sum of the maximum size of the battery monomers in each row along the first direction / the maximum size of the two first inner walls along the first direction is within the interval [0.771, 0.947]. In this way, the battery monomers have a relatively appropriate maximum size along the first direction, so that the battery monomers have a relatively high heat dissipation capacity, which facilitates efficient heat dissipation of the battery monomers, so that the maximum temperature of the battery monomers can be within a relatively optimal range, thereby prolonging the service life of the battery device. On the other hand, the battery monomers in each row have a relatively appropriate number, so that the battery monomers have a relatively high grouping efficiency along the first direction, so that the battery monomer array can fully utilize the internal space of the box body along the first direction, which helps to improve the space utilization of the battery device and improve the energy density of the battery device. Therefore, by adopting the above technical solutions, the battery device can have a relatively high heat dissipation capacity and energy density, that is, the battery device can have the advantages of high heat dissipation capacity and high energy density.

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

[0011] In this way, the battery device can have a relatively high heat dissipation capacity and energy density, so that the battery device can have the advantages of high heat dissipation capacity and high energy density.

[0012] In some embodiments, the maximum size of the battery monomer along the second direction is a third size, and the third size ≤ 400 mm.

[0013] By setting the maximum size of the battery monomer along the second direction to be ≤ 400 mm and arranging the electrode terminals at the opposite ends of the battery monomer along the second direction, the battery monomer has a relatively appropriate length of the overcurrent path, which can improve the problem that the battery monomer generates a very large amount of heat due to the overlong overcurrent path. In this way, the heat generated by the battery monomer can be within a relatively optimal range, so that the maximum temperature of the battery monomer can be within a relatively optimal range, thereby prolonging the service life of the battery device.

[0014] In some embodiments, the maximum size of the battery monomer along the second direction is a third size, and the third size ≥ 200 mm.

[0015] By adopting the technical scheme, the maximum size (i.e., the third size) of the battery monomer in the second direction has a certain value range. In this way, on the one hand, the battery monomer can have a relatively appropriate length of the overcurrent path, which can improve the problem that the battery monomer generates a very large amount of heat due to the overcurrent path being too large, so that the heat generation of the battery monomer is within a relatively optimal range, thereby making the maximum temperature of the battery monomer within a relatively optimal range, which is beneficial to prolong the service life of the battery device. On the other hand, under the condition that the maximum size of the two first inner walls in the first direction is predetermined, the number of battery monomers in each column, i.e., the value of M, can be reduced, which can improve the grouping efficiency of each column of battery monomers in the second direction, so that the battery monomer array can fully utilize the internal space of the box in the second direction, which is helpful to improve the space utilization of the battery device and improve the energy density of the battery device.

[0016] In some embodiments, N≥40.

[0017] By N≥40, under the condition that the maximum size of the two first inner walls in the first direction is predetermined, the maximum size of the battery monomer in the first direction will not be too large, so that the battery monomer has a lower heat generation and a higher heat dissipation capacity, which is beneficial to prolong the service life of the battery device.

[0018] In some embodiments, N≤150.

[0019] In this way, on the one hand, the battery monomer can have a lower heat generation and a higher heat dissipation capacity, which is beneficial to prolong the service life of the battery device. On the other hand, the grouping efficiency of each row of battery monomers in the first direction can be improved, so that the battery monomer array can fully utilize the internal space of the box in the first direction, which is helpful to improve the space utilization of the battery device and improve the energy density of the battery device. In this way, the battery device can have the advantages of high heat dissipation capacity and high energy density.

[0020] 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.

[0021] By adopting the technical scheme, the battery monomer array can be arranged in the box according to the demand, which can improve the arrangement flexibility and convenience of the battery monomer array in the box.

[0022] In some embodiments, the second direction is the walking direction of the electric device having the battery device; or, the first direction is the walking direction of the electric device having the battery device.

[0023] By adopting the technical scheme, the battery monomer array can be arranged in the box according to requirements, and the arrangement flexibility and convenience of the battery device on the electric device can be improved.

[0024] In some embodiments, the battery monomer is provided with a first surface on opposite sides in the first direction, and is provided with a second surface on opposite ends in the second direction, the electrode terminal protrudes from the second surface, and the area of the first surface is greater than the area of the second surface.

[0025] By the area of the first surface being greater than the area of the second surface, the maximum dimension of the monomer body in the first direction is less than the maximum dimension of the monomer body in the second direction, and then the maximum dimension of the battery monomer in the first direction is less than the maximum dimension (i.e. the third dimension) of the battery monomer in the second direction, that is, the length of the battery monomer is greater than the thickness of the battery monomer. In this way, the battery monomer has better heat dissipation capacity, so as to reduce the maximum temperature of the battery monomer, and prolong the service life of the battery device.

[0026] In some embodiments, the second dimension is ∈ [10mm, 45mm].

[0027] In this way, the battery monomer has a smaller dimension in the first direction. In this way, on the one hand, the battery monomer has higher heat dissipation capacity, and the battery monomer can be efficiently cooled, which helps to reduce the temperature of the battery monomer, so that the maximum temperature of the battery monomer can be in an optimal range, and the service life of the battery device is prolonged. On the other hand, under the condition that the maximum dimension of the two first inner walls in the first direction is predetermined, each row of battery monomers has a more appropriate number of battery monomers, i.e. the value of N is more appropriate, so that each row of battery monomers has higher grouping efficiency in the first direction, for example, but not limited to, can save parts between adjacent battery monomers in the first direction, and can reduce the problem of space waste caused by the arrangement tolerance between adjacent battery monomers, so that the battery monomer array can fully utilize the internal space of the box in the first direction, which helps to improve the space utilization of the battery device and improve the energy density of the battery device. Therefore, by adopting the above technical scheme, the battery device can have higher heat dissipation capacity and energy density, that is, the battery device can have the advantages of high heat dissipation capacity and high energy density.

[0028] In some embodiments, the second dimension is ∈ [15mm, 30mm].

[0029] By adopting the technical solution, the battery monomer has a smaller size along the first direction. In this way, on the one hand, the battery monomer has a higher heat dissipation capacity, so that the maximum temperature of the battery monomer can be within an optimal range. On the other hand, under the condition that the maximum size of the two first inner walls along the first direction is predetermined, each row of battery monomers has a more appropriate number of battery monomers, i.e. the value of N is more appropriate, so that each row of battery monomers has a higher grouping efficiency in the first direction, thereby enabling the battery monomer array to fully utilize the internal space of the box in the first direction, which helps to improve the space utilization of the battery device and improve the energy density of the battery device. Therefore, by adopting the above technical solution, the battery device has a higher heat dissipation capacity and energy density.

[0030] In some embodiments, the battery monomer is provided with a third surface at opposite ends along a third direction, and the area of the first surface is greater than the area of the third surface.

[0031] By the area of the first surface being greater than the area of the third surface, the maximum size of the monomer body along the third direction is greater than the maximum size of the monomer body along the first direction, i.e. the fourth size below is greater than the second size, i.e. the width of the battery monomer is greater than the thickness of the battery monomer. In this way, the battery monomer has an optimal heat dissipation capacity to reduce the maximum temperature of the battery monomer.

[0032] In some embodiments, the maximum size of the battery monomer along the third direction is a fourth size, and the fourth size ∈ [60mm, 160mm].

[0033] By adopting the technical solution, the battery monomer has a more appropriate maximum size in the third direction, which helps to make the battery monomer have an optimal heat dissipation capacity to reduce the maximum temperature of the battery monomer.

[0034] In some embodiments, the fourth size ∈ [80mm, 130mm].

[0035] By adopting the technical solution, the battery monomer has a more appropriate maximum size in the third direction, which helps to make the battery monomer have an optimal heat dissipation capacity to reduce the maximum temperature of the battery monomer.

[0036] In some embodiments, the box includes two first walls oppositely arranged along the first direction, the first inner wall is an inner wall of the first wall, the outer wall of the first wall is the first outer wall, and the maximum distance of the first outer walls of the two first walls along the first direction is a fifth size. The second size*N / fifth size ∈ [0.744, 0.918].

[0037] By adopting the technical scheme, the battery monomer has a relatively appropriate maximum size along the first direction, and each row of battery monomers has a relatively appropriate number of battery monomers. In this way, the battery device has high heat dissipation capacity and high energy density.

[0038] In some embodiments, the second size*N / fifth size∈[0.82, 0.918].

[0039] By adopting the technical scheme, the battery monomer has a relatively appropriate maximum size along the first direction, and each row of battery monomers has a relatively appropriate number of battery monomers. In this way, the battery device has high heat dissipation capacity and high energy density.

[0040] In some embodiments, the battery monomer includes at least one group of electrode terminals at each end along the second direction, and a group of electrode terminals includes positive electrode terminals and negative electrode terminals spaced along the third direction; the third direction intersects the first direction and the second direction.

[0041] By arranging at least one group of electrode terminals with different polarities at each end of the battery monomer along the second direction, the average overcurrent path of the battery monomer can be effectively shortened, thereby reducing the internal resistance of the battery monomer, reducing the heat generation of the battery monomer, and reducing the maximum temperature of the battery monomer, thereby improving the performance and reliability of the battery device.

[0042] In some embodiments, at least one end of the battery monomer along the second direction includes a pressure relief mechanism spaced from the electrode terminals.

[0043] By arranging the pressure relief mechanism at at least one end of the battery monomer along the second direction, the internal space of the box body can be effectively saved, thereby helping to improve the space utilization and energy density of the battery device. Moreover, this also facilitates the arrangement of the heat management component at the opposite ends of the battery monomer array along the third direction, and on this basis, the pressure relief mechanism can effectively achieve the pressure relief effect of the battery monomer.

[0044] In some embodiments, N≥2, and in each row of battery monomers, an insulating glue is arranged between adjacent two battery monomers.

[0045] And / or, M≥2, and in each column of battery monomers, an insulating glue is arranged between adjacent two battery monomers.

[0046] By arranging the insulating glue between the two adjacent battery monomers, on the one hand, the insulation effect between the two adjacent battery monomers can be achieved, the adverse effects between the two adjacent battery monomers can be reduced, and the performance of the battery device can be fully exerted. On the other hand, the two adjacent battery monomers can be fixed by the insulating glue, so that the fixing mode of the battery monomer array is very simple, the assembly of the battery device is facilitated, and the production efficiency of the battery device can be improved. In addition, the insulating glue can play a protective role in the thermal runaway process of the battery monomer, and the problem of high-pressure sparking caused by the particulate matter ejected by the battery monomer can be improved.

[0047] In some embodiments, the battery monomer is provided with a pressure relief mechanism spaced apart from the electrode terminal, and at least part of the insulating glue is arranged on the electrode terminal and avoids the pressure relief mechanism.

[0048] By arranging at least part of the insulating glue on the electrode terminal, the insulation and fixing effects between the two adjacent battery monomers can be achieved by the insulating glue. Moreover, by arranging the insulating glue to avoid the pressure relief mechanism, the pressure relief effect of the pressure relief mechanism can be facilitated.

[0049] In some embodiments, the pressure relief mechanism and the electrode terminal are spaced apart in a third direction, and in the third direction, the insulating glue exceeds the electrode terminal and is spaced apart from the pressure relief mechanism; the third direction intersects the first direction and the second direction, respectively.

[0050] In this way, the insulating glue can be arranged on the electrode terminal and avoid the pressure relief mechanism, so that the insulating glue can achieve insulation protection, fixation, thermal runaway protection, and the like, and the effect of the pressure relief mechanism can be ensured to a certain extent.

[0051] In some embodiments, N≥2, and in each row of battery monomers, a separation component is arranged between the two adjacent battery monomers.

[0052] And / or, M≥2, and in each column of battery monomers, a separation component is arranged between the two adjacent battery monomers.

[0053] By separating the two adjacent battery monomers by the separation component, on the one hand, the separation component can separate the high pressure between the two adjacent battery monomers, and the adverse effects between the two adjacent battery monomers can be reduced, so that the performance of the battery device can be fully exerted. On the other hand, the overall strength of the battery monomer array can be improved, the adverse effects of external factors such as vibration on the battery monomer array can be reduced, and the adaptability of the battery device can be effectively improved.

[0054] In some embodiments, the box further comprises a thermal management component arranged at at least one end of the battery monomer array in a third direction, the thermal management component being connected with the battery monomer to adjust the temperature of the battery monomer, and the third direction intersects the first direction and the second direction, respectively.

[0055] A thermal management component is provided at least one end of the battery cell array along a third direction, so that the thermal management component at at least one end of the battery cell array along a third direction can perform thermal management on the battery cell array.

[0056] Secondly, embodiments of this application provide an electrical device, including a battery device.

[0057] The electrical device provided in this application embodiment, by employing the battery device mentioned above, enables the battery device to take into account the advantages of high heat dissipation capacity and high energy density, thereby improving the performance and reliability of the battery device, which in turn helps to improve the performance and reliability of the electrical device.

[0058] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0061] Figure 2 Exploded views of a battery device provided in some embodiments of this application;

[0062] Figure 3 Schematic diagram of a battery device provided for other embodiments of this application;

[0063] Figure 4 for Figure 3 Exploded view of the provided battery device;

[0064] Figure 5 A perspective structural diagram of a battery cell for a battery device provided in some embodiments of this application;

[0065] Figure 6 for Figure 3 A partial schematic diagram of the battery pack housing provided;

[0066] Figure 7 for Figure 3 A partial schematic diagram of the provided battery device;

[0067] Figure 8 is Figure 7 enlarged view of A in the middle;

[0068] Figure 9 is Figure 3 cross-sectional view along B-B;

[0069] Figure 10 is Figure 9 enlarged view of A in the middle;

[0070] Figure 11 is a partial schematic view of a battery device according to some embodiments of the present application;

[0071] Figure 12 is Figure 3 perspective view of a battery cell array of a battery device according to some embodiments of the present application.

[0072] In the drawings:

[0073] 3000 - vehicle; 3100 - controller; 3200 - motor; 10 - battery device; 1 - battery cell array; 101 - first surface; 102 - second surface; 103 - third surface; 11 - battery cell; 111 - electrode terminal; 111a - positive electrode terminal; 111b - negative electrode terminal; 112 - cell body; 1121 - housing; 11211 - case; 11212 - end cap; 113 - pressure relief mechanism; 2 - box; 21 - first portion; 22 - second portion; 211 - first wall; 2111 - first inner wall; 2112 - first outer wall; 212 - thermal management component; 2121 - second inner wall; 213 - partition component; 3 - busbar component; L1 - first dimension; L2 - second dimension; L3 - third dimension; L4 - fourth dimension; L5 - fifth dimension; a - length direction; b - width direction; c - traveling direction; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0074] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and letters throughout the figures denote the same or like elements or elements with the same or similar functionality. The embodiments described below are exemplary and intended to explain the present application, and are not intended to limit the present application.

[0075] All embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, if not specifically stated.

[0076] If there is no special description, all the technical features and optional technical features of the embodiments of the present application can be combined with each other to form new technical solutions.

[0077] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0078] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0079] In the description of the embodiments of the present application, "a plurality of" means two or more, unless otherwise explicitly specified and limited, and "two or more" includes two. Accordingly, the meaning of "a plurality of groups" is two or more groups, including two groups.

[0080] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] In the description of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent: A exists, A and B exist, and B exist. In addition, in the present application, the character " / ", generally represents that the front and rear associated objects have an "or" relationship.

[0082] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "adjacent", "adjacent to" refer to close in position. For example, there are three components A1, A2 and B, the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, and it can also be said that B is adjacent to A2, in other words, A2 is adjacent to B. For another example, there are multiple C components, and the multiple C components are C1, C2, CN respectively, when one of the C components, such as C2, is closer to the B component than the other C components, then B is adjacent to C2, and it can also be said that C2 is adjacent to B, in other words, C2 is adjacent to B.

[0083] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0084] From the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0085] The power battery can generally include a box body and a plurality of battery monomers arranged in the box body.

[0086] In some cases, based on the arrangement form of the battery monomers in the box body, the power battery can have a high space utilization rate to have a high energy density. However, it is inevitable that the heat dissipation capacity of the battery monomers will be poor, so that the maximum temperature of the battery monomers is very high, which affects the service life of the power battery. In other cases, by adjusting the arrangement form of the battery monomers in the box body, the heat dissipation capacity of the power battery can be improved to reduce the maximum temperature of the battery monomers and prolong the service life of the power battery. However, it is inevitable that the space utilization rate of the power battery will be reduced to reduce the energy density of the power battery. Thus, the power battery is difficult to balance the heat dissipation capacity and the energy density.

[0087] Exemplarily, by reducing the number of battery cells in the power battery, the grouping efficiency of the battery cells can be improved, the arrangement of parts between adjacent battery cells can be saved, and the problem of space waste caused by arrangement tolerance between adjacent battery cells can be improved, so as to improve the space utilization of the power battery, and to improve the energy density of the power battery. However, in this way, the volume of the battery cell is very large, which inevitably affects the heat dissipation capacity of the battery cell, so that the maximum temperature of the battery cell is very high, which affects the service life of the power battery.

[0088] Exemplarily, by reducing the volume of the battery cell, the heat dissipation capacity of the battery cell can be improved, so that the maximum temperature of the battery cell can be reduced. However, in this way, the number of battery cells needs to be increased, and the arrangement between adjacent battery cells needs to be adapted, so that the grouping efficiency of the battery cell is inevitably reduced, the space utilization of the power battery is reduced, and the energy density of the power battery is reduced.

[0089] Based on the above considerations, the embodiments of the present application provide a battery device and a power utilization device. The battery device comprises a box body and a battery cell array arranged in the box body. The battery cell array comprises a plurality of battery cells arranged in M rows and N columns. Each row of battery cells is arranged along a first direction, and the maximum size (second size) of the battery cells along the first direction * the number (N) of battery cells in each row / the maximum size (first size) of the two first inner walls along the first direction ∈ [0.771, 0.947], i.e. the sum of the maximum size of each row of battery cells in the first direction / the maximum size of the two first inner walls in the first direction is within the interval [0.771, 0.947]. In this way, each row of battery cells has a relatively appropriate maximum size and number in the first direction, so that the battery cells can be arranged more compactly in the box body. In this way, on the one hand, the battery cells have a relatively appropriate maximum size in the first direction, so that the battery cells have a relatively high heat dissipation capacity, which facilitates efficient heat dissipation of the battery cells, so that the maximum temperature of the battery cells can be within a relatively optimal range, which is beneficial to prolong the service life of the battery device. On the other hand, each row of battery cells has a relatively appropriate number, so that the battery cells have a relatively high grouping efficiency in the first direction, so that the battery cell array can fully utilize the internal space of the box body, which is helpful to improve the space utilization of the battery device and to improve the energy density of the battery device. Therefore, by adopting the above technical solutions, the battery device can have a relatively high heat dissipation capacity and energy density, i.e. the battery device can have the advantages of high heat dissipation capacity and high energy density.

[0090] It should be noted that the battery device provided by the embodiments of the present application is developed based on the problem that it is difficult to balance the heat dissipation capability and the energy density of the power battery, but the application scenarios of the battery device are not limited to the power battery. Understandably, the battery device can be a power battery or a storage battery.

[0091] The battery device related by the embodiments of the present application can be a single physical module including one or more battery cells for providing voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, connected in parallel or connected in a mixed manner through a busbar. The mixed connection means that there are both series connection and parallel connection among the multiple battery cells.

[0092] In some embodiments, the battery device can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. As an example, the multiple battery cells can be fixed to form a battery module by a cable tie or the like. As an example, the multiple battery cells can also be fixed to form a battery module by an end plate, a side plate or the like.

[0093] In some embodiments, the battery device can be a battery pack, which can include a box body and battery cells. As an example, the battery cells can be directly accommodated in the box body. As an example, the multiple battery cells can first form one or more battery modules, and then be accommodated in the box body.

[0094] The battery cell refers to the smallest unit for storing and outputting electric energy. The battery cell can be a secondary battery or a primary battery. The secondary battery refers to a battery cell that can be activated by charging after discharging.

[0095] The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes. The battery cell can 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-acid battery, etc.

[0096] The battery device related by the embodiments of the present application can be a storage device, such as a storage container or a storage cabinet.

[0097] The battery device provided by the embodiments of the present application can also be used in a power consumption device using the battery device as a power supply.

[0098] Electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. Based on the power source, vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Based on the drive method, vehicles can be front-wheel drive vehicles, rear-wheel drive vehicles, or four-wheel drive vehicles.

[0099] For ease of description, this application uses a vehicle as an example to illustrate the embodiments of the electrical device.

[0100] In some embodiments, please refer to Figure 1 , Figure 1 This is a schematic diagram of a vehicle 3000 provided in some embodiments of this application. A battery device 10 is disposed inside the vehicle 3000, and the battery device 10 may be located at the bottom, front, or rear of the vehicle 3000. The battery device 10 can be used to power the vehicle 3000; for example, the battery device 10 can serve as the operating power source for the vehicle 3000. The vehicle 3000 may also include a controller 3100 and a motor 3200. The controller 3100 is used to control the battery device 10 to supply power to the motor 3200, for example, to meet the power needs of the vehicle 3000 during startup, navigation, and driving.

[0101] In some embodiments, the battery device 10 can not only serve as the operating power source for the vehicle 3000, but also as the driving power source for the vehicle 3000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 3000.

[0102] In some embodiments, please refer to the following: Figures 2 to 4 , Figure 2 This is an exploded view of the battery device 10 provided in some embodiments of this application. Figure 3 This is a schematic diagram of the battery device 10 provided in other embodiments of this application. Figure 4 for Figure 3 An exploded view of the provided battery assembly 10. The battery assembly 10 may include a housing 2 and individual battery cells 11. The housing 2 has an internal space for accommodating the individual battery cells 11.

[0103] The housing 2 can adopt various structures. In some embodiments, the housing 2 may include a first part 21 and a second part 22, which overlap each other and together define the internal space of the housing 2, which is a closed space. Here, "closed" means covered or closed, and can be sealed or unsealed. That is, the housing 2 can be a sealed structure or an unsealed structure.

[0104] Please refer to Figure 2 Both the first part 21 and the second part 22 can be hollow structures with an opening at one end. The open side of the first part 21 covers the open side of the second part 22, so that the first part 21 and the second part 22 together define the internal space of the box 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. The second part 22 covers the opening 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 2. The box 2 composed of the first part 21 and the second part 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0105] In some embodiments, multiple battery cells 11 can be connected in series, parallel, or mixed to form a whole, and then the whole formed by the multiple battery cells 11 is directly housed in the internal space of the housing 2. In other embodiments, multiple battery cells 11 can also be connected in series, parallel, or mixed to form a battery module, and the battery module is housed in the internal space of the housing 2. In still other embodiments, multiple battery cells 11 can also be connected in series, parallel, or mixed to form multiple battery modules, and the multiple battery modules can then be connected in series, parallel, or mixed to form a whole, and housed in the internal space of the housing 2.

[0106] In some embodiments, please combine Figure 1 , Figure 2 and Figure 4 The housing 2 of the battery unit 10 can be part of the chassis structure of the vehicle 3000. For example, a portion of the housing 2 can be at least a part of the floor of the vehicle 3000, or a portion of the housing 2 can be at least a part of the crossbeams and longitudinal beams of the vehicle 3000.

[0107] In some embodiments, please refer to Figure 5 And in conjunction with other accompanying figures. Figure 5 This is a perspective structural view of a battery cell 11 of a battery device 10 provided in some embodiments of this application. The battery cell 11 provided in the embodiments of this application may include an electrode assembly and a housing 1121.

[0108] The electrode assembly is a component in which electrochemical reactions occur in the battery cell 11. 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 arranged between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting a main body of the electrode assembly, and a portion without active material of the positive electrode sheet and the negative electrode sheet respectively constitutes a tab. The tab of the positive electrode sheet is a positive electrode tab, and the tab of the negative electrode sheet is a negative electrode tab. The positive electrode tab and the negative electrode tab can be located at one end of the main body together; or the positive electrode tab and the negative electrode tab can also be located at opposite ends of the main body respectively.

[0109] In the battery cell 11, the number of electrode assemblies can be one or multiple.

[0110] In some cases, the electrode assembly can also be referred to as a bare cell, a winding body, a laminated body, etc.

[0111] In some embodiments, the battery cell 11 can also include an electrolyte, which plays a role in conducting ions between the positive electrode sheet and the negative electrode sheet. Among them, the electrolyte involved in the embodiments of the present application can be liquid, gel or solid.

[0112] The shell 1121 is used to define the internal environment of the battery cell 11, and the shell 1121 is used to accommodate the electrode assembly and the electrolyte.

[0113] In some embodiments, please refer to Figure 5 , and combine with other drawings. The shell 1121 can include a shell body 11211 and an end cover 11212, which are components used to define the internal environment of the battery cell 11 together, and the internal environment defined by the shell body 11211 and the end cover 11212 is used to accommodate the electrode assembly and the electrolyte. Among them, the shell body 11211 and the end cover 11212 can be independent components. Specifically, the shell body 11211 has an opening, and the end cover 11212 is arranged at the opening of the shell body 11211 to define the internal environment of the battery cell 11 together with the shell body 11211, and to isolate the internal environment of the battery cell 11 from the external environment. Alternatively, the shell body 11211 and the end cover 11212 can also be an integrated structure. Specifically, the end cover 11212 and the shell body 11211 can form a common connecting surface before the electrode assembly enters the shell, and when the electrode assembly enters the shell, the end cover 11212 is closed to the shell body 11211 to encapsulate the electrode assembly.

[0114] 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, to some extent, leakage of electrolyte and the like. As an example, when the shell 1121 is a non-sealed structure, the shell 1121 can protect the electrode assembly, and a sealing bag can be further arranged between the shell 1121 and the electrode assembly to encapsulate the electrode assembly and electrolyte and the like. Specifically, the sealing bag can be a bag-shaped insulating structure, an aluminum plastic film, or the like.

[0115] The number of the end cover 11212 can be one. Alternatively, as shown in Figure 5 , the number of the end cover 11212 can also be two, and the two end covers 11212 are arranged at opposite ends of the shell 11211.

[0116] The shell 11211 can be cylindrical, square, or the like, and can be determined according to the specific shape and size of the electrode assembly. In addition, the shell 11211 and the end cover 11212 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, or the like.

[0117] In some embodiments, referring to Figure 5 , and in combination with other drawings. The battery cell 11 can further include an electrode terminal 111. The electrode terminal 111 refers to a component having electrical conductivity, and serves as a current transmission end of the battery cell 11 for transmitting current. The electrode terminal 111 can be, but is not limited to, a pole.

[0118] The electrode terminal 111 is in conductive connection with the electrode assembly. Specifically, the electrode terminal 111 is in conductive connection with the tab of the electrode assembly. The electrode terminal 111 can be directly in conductive connection with the tab by welding, bonding, or the like. Alternatively, an adapter structure can be arranged between the electrode terminal 111 and the tab to achieve an adapter between the electrode terminal 111 and the tab to enable current flow, thereby indirectly achieving conductive connection between the electrode terminal 111 and the tab. The adapter structure refers to a metal structure having electrical conductivity, for example, but is not limited to, a copper bar.

[0119] In some embodiments, referring to Figure 5 , and in combination with other drawings. The electrode terminal 111 is provided in at least two, and the at least two electrode terminals 111 can include a positive electrode terminal 111a and a negative electrode terminal 111b. The positive electrode terminal 111a is in conductive connection with the positive tab of the electrode assembly, and the negative electrode terminal 111b is in conductive connection with the negative tab of the electrode assembly.

[0120] In some embodiments, referring to Figure 5, and in combination with other drawings. The electrode terminal 111 is arranged on the shell 1121. Specifically, the electrode terminal 111 can be arranged on the shell body 11211 of the shell 1121, or arranged on the end cover 11212 of the shell 1121. Among them, the positive electrode terminal 111a and the negative electrode terminal 111b can be arranged on the shell body 11211 at the same time. Or, as shown in Figure 5 , the positive electrode terminal 111a and the negative electrode terminal 111b are arranged on the end cover 11212 at the same time. Or, the shell body 11211 and the end cover 11212 are both provided with the electrode terminal 111.

[0121] Among them, the same end of the shell 1121 can be provided with the positive electrode terminal 111a and the negative electrode terminal 111b, and the opposite ends of the shell 1121 can also be provided with the positive electrode terminal 111a and the negative electrode terminal 111b.

[0122] Please refer to Figure 4 , Figures 6 to 10 , and in combination with other drawings. Among them, Figure 6 is a partial schematic view of the box 2 of the battery device 10 provided by Figure 3 , specifically a partial schematic view of the box 2 in the third direction Z. Figure 7 is a partial schematic view of the battery device 10 provided by Figure 3 , specifically a partial schematic view of the battery device 10 in the third direction Z. Figure 8 is an enlarged view of A in Figure 7 , Figure 9 is a sectional view along B-B of Figure 3 , Figure 10 is a partial enlarged view of Figure 9 . The battery device 10 provided by the embodiment of the application comprises a box 2 and a battery monomer array 1. The box 2 comprises two first inner walls 2111, the two first inner walls 2111 are arranged opposite along the first direction X, and the maximum distance of the two first inner walls 2111 along the first direction X is a first size L1. The battery monomer array 1 is arranged between the two first inner walls 2111. The battery monomer array 1 comprises a plurality of battery monomers 11, and the plurality of battery monomers 11 are arranged in an M-row and N-column array. In the battery monomer array 1, each row of battery monomers 11 is arranged along the first direction X, and each column of battery monomers 11 is arranged along the second direction Y. The maximum size of the battery monomer 11 along the first direction X is a second size L2, and the battery monomer 11 is provided with an electrode terminal 111 at least at one end along the second direction Y. Among them, M≥1, N≥1, and M and N are both positive integers. The second size L2*N / first size L1∈[0.771, 0.947]. Among them, the first direction X intersects the second direction Y.

[0123] The first inner wall 2111 refers to the inner wall surface of the inner space of the box body 2. The first portion 21 of the box body 2 can be provided with the first inner wall 2111, and the second portion 22 of the box body 2 can also be provided with the first inner wall 2111. As an example, as shown in Figure 2 , the first portion 21 and the second portion 22 of the box body 2 are both provided with the first inner wall 2111. As another example, as shown in Figure 4 and Figure 6 , the first inner wall 2111 is arranged on the first portion 21 of the box body 2.

[0124] It can be understood that the battery monomer array 1 is arranged in the box body 2 and located between the two first inner walls 2111.

[0125] It can be understood that the battery monomer array 1 includes M*N battery monomers 11, the M*N battery monomers 11 include M rows of battery monomers 11 and N columns of battery monomers 11, and the M*N battery monomers 11 are arranged in an array in the box body 2 and located between the two first inner walls 2111. Based on this, the battery monomer array 1 refers to an array formed by M rows and N columns of M*N battery monomers 11.

[0126] In the battery monomer array 1, each column of battery monomers 11 includes M battery monomers 11, and each row of battery monomers 11 includes N battery monomers 11. Wherein, M can be 1, or can be greater than 1, for example, can be 2, 3, 4, 5, 6, 7, 8, 9, etc. N can be 1, or can be greater than 1, for example, can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, etc. As an example, as shown in Figure 7 , M is 3 and N is greater than 3. In addition, the battery monomer array 1 can also be a one-row-one-column structure, that is, M and N are both 1; can also be a two-row-one-column structure, that is, M is 2 and N is 1; can also be a one-row-two-column structure, that is, M is 1 and N is 2; or can be a two-row-two-column structure, that is, M and N are both 2.

[0127] In the battery monomer array 1, each row of battery monomers 11 is arranged along the first direction X, that is, when N is greater than 1, the N battery monomers 11 of each column are sequentially distributed along the first direction X. In the battery monomer array 1, each column of battery monomers 11 is arranged along the second direction Y, that is, when M is greater than 1, the M battery monomers 11 of each row are sequentially distributed along the second direction Y.

[0128] Based on that at least one end of the battery monomer 11 along the second direction Y is provided with an electrode terminal 111: it can be understood that one end of the battery monomer 11 along the second direction Y is provided with an electrode terminal 111; or, as shown in Figure 5 , the opposite two ends of the battery monomer 11 along the second direction Y are both provided with an electrode terminal 111.

[0129] It can be understood that the battery cell 11 can include a cell body 112 and a plurality of electrode terminals 111. The plurality of electrode terminals 111 can be arranged at one end of the cell body 112 along the second direction Y; or, as shown in Figure 5 the plurality of electrode terminals 111 can be arranged at opposite ends of the cell body 112 along the second direction Y, i.e., the electrode terminals 111 are arranged at opposite ends of the cell body 112 along the second direction Y. The cell body 112 is the main part of the battery cell 11, and the cell body 112 includes a shell 1121, an electrode assembly arranged in the shell 1121, an electrolyte arranged in the shell 1121, etc. It should be noted that the maximum dimension of the battery cell 11 along the first direction X refers to the maximum dimension of the cell body 112 along the first direction X, i.e., the maximum dimension of the shell 1121 along the first direction X, which is the second dimension L2.

[0130] It should be noted that based on the arrangement of the electrode terminals 111 at one end of the battery cell 11 along the second direction Y, the maximum dimension of the internal space of the box body 2 along the second direction Y is predetermined, and the dimension of the cell body 112 of each column of battery cells 11 along the second direction Y can be very large, i.e., the box body 2 can arrange the cell body 112 with a very large dimension 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 opposite ends of the battery cell 11 along the second direction Y, the battery cell 11 can achieve overcurrent.

[0131] The second dimension L2*N / first dimension L1 is equal to or greater than 0.771 and less than or equal to 0.947, and the second dimension L2*N / first dimension L1 can be specifically 0.771, 0.78, 0.79, 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.92, 0.93, 0.94, 0.947, etc.

[0132] The first direction X refers to the arrangement direction of each row of battery cells 11. The second direction Y refers to the general distribution direction of the cell body 112 and the electrode terminal 111, i.e., the arrangement direction of each column of battery cells 11. In some cases, the second direction Y can be the length extension direction of the battery cell 11.

[0133] The first direction X and the second direction Y intersect, that is, the first direction X and the second direction Y can form an included angle greater than 0° and less than 180°, that is, the first direction X and the second direction Y are not parallel. The first direction X and the second direction Y can be perpendicular to each other, or can not be perpendicular. The first direction X and the second direction Y can be directions intersecting on the same plane, or can be directions on planes respectively perpendicular to each other, and the projection of the second direction Y on the plane where the first direction X is located can intersect the first direction X. As an example, the first direction X and the second direction Y are perpendicular.

[0134] The battery device 10 provided by the embodiment of the present application comprises a box body 2 and a battery monomer array 1 arranged in the box body 2. The battery monomer array 1 comprises a plurality of battery monomers 11 arranged in an M-row and N-column array. Each row of battery monomers 11 is arranged along a first direction X. The maximum size (i.e., the second size L2) of the battery monomers 11 along the first direction X * the number (i.e., N) of each row of battery monomers 11 / the maximum size (i.e., the first size L1) of the two first inner walls 2111 along the first direction X ∈ [0.771, 0.947]. That is, the sum of the maximum sizes of the battery monomers 11 in each row of battery monomers 11 along the first direction X / the maximum size of the two first inner walls 2111 along the first direction X is within the interval [0.771, 0.947]. In the case that the maximum size of the two first inner walls 2111 along the first direction X is predetermined, each row of battery monomers 11 has a relatively appropriate number of battery monomers 11, that is, the value of N is relatively appropriate, and the battery monomers 11 have a relatively appropriate maximum size along the first direction X, so that each row of battery monomers 11 can be arranged relatively compactly in the box body 2 along the first direction X.

[0135] In this way, on the one hand, since the battery monomer 11 has a relatively appropriate maximum size in the first direction X, the battery monomer 11 can have a higher heat dissipation capacity, facilitating efficient heat dissipation of the battery monomer 11, which helps to reduce the temperature of the battery monomer 11, so that the maximum temperature of the battery monomer 11 can be within a relatively optimal range, which is beneficial to prolong the service life of the battery device 10. On the other hand, since each row of battery monomers 11 has a relatively appropriate number of battery monomers 11, each row of battery monomers 11 has a higher grouping efficiency in the first direction X, for example, but not limited to, it can save parts between adjacent battery monomers 11 in the first direction X, save the arrangement of the shell 1121 of the battery monomer 11 in the first direction X, and reduce the problem of space waste caused by the arrangement tolerance between adjacent battery monomers 11, so that the battery monomer array 1 can fully utilize the internal space of the box 2 in the first direction X, which helps to improve the space utilization of the battery device 10 and improve the energy density of the battery device 10. Therefore, by adopting the above technical solution, the battery device 10 can have a higher heat dissipation capacity and energy density, so that the maximum temperature and energy density of the battery device 10 can be within a relatively optimal range, that is, in the case that the maximum temperature of the battery monomer 11 of the battery device 10 is low, the battery device 10 has a higher energy density, so that the battery device 10 can have the advantages of high heat dissipation capacity and high energy density, and improve the performance and reliability of the battery device 10. In this way, the battery device 10 can have high-efficiency fast-charging capability.

[0136] It should be noted here that based on the relatively appropriate maximum size of the battery monomer 11 in the first direction X, the heat generation of the battery monomer 11 can be reduced, thereby helping to reduce the maximum temperature of the battery monomer 11.

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

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

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

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

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

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

[0143] In this way, the battery device 10 can have higher heat dissipation capacity and energy density, so that the battery device 10 can have the advantages of high heat dissipation capacity and high energy density.

[0144] The maximum dimension of the battery monomer 11 along the second direction Y is a third dimension L3. Wherein, the maximum dimension of the battery monomer 11 along the second direction Y refers to the maximum dimension of the whole composed of the monomer body 112 and the electrode terminal 111 along the second direction Y, that is, the maximum dimension between the electrode terminals 111 at the opposite ends of the monomer body 112 along the second direction Y in the case that the monomer body 112 is provided with the electrode terminal 111 at the opposite ends along the second direction Y of the battery monomer 11, and the third dimension L3.

[0145] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. The third dimension L3≤400mm.

[0146] The third dimension L3≤400mm, and specifically can be 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, etc.

[0147] It also needs to be added here that the maximum dimension of the battery monomer 11 along the second direction Y is ≤400mm, and the electrode terminal 111 is provided at the opposite ends of the battery monomer 11 along the second direction Y, so that the battery monomer 11 has a relatively appropriate length of the overcurrent path, which can improve the problem that the battery monomer 11 has a very large amount of heat due to the overcurrent path being too long. In this way, the amount of heat of the battery monomer 11 can be within a relatively optimal range, so that the maximum temperature of the battery monomer 11 can be within a relatively optimal range, which is beneficial to prolong the service life of the battery device 10.

[0148] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. The third dimension L3≥200mm.

[0149] It can be understood that 200mm≤the third dimension L3≤400mm, and the third dimension L3 specifically can be 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm, 390mm, 400mm, etc.

[0150] By adopting the technical scheme, the maximum dimension (i.e., the third dimension L3) of the battery monomer 11 in the second direction Y has a certain value range. In this way, on the one hand, the battery monomer 11 can have a relatively appropriate length of overcurrent path, which can improve the problem that the battery monomer 11 has a very large heat generation due to the overcurrent path being too large, so that the heat generation of the battery monomer 11 is within a relatively optimal range, thereby making the highest temperature of the battery monomer 11 within a relatively optimal range, which is beneficial to prolong the service life of the battery device 10. On the other hand, under the condition that the maximum dimension of the two first inner walls 2111 in the first direction X is predetermined, the number of battery monomers 11 in each column, i.e., the value of M, can be reduced, which can improve the relatively appropriate grouping efficiency of each column of battery monomers 11 in the second direction Y, so that the battery monomer array 1 can fully utilize the internal space of the box body 2 in the second direction Y, which is helpful to improve the space utilization of the battery device 10 and improve the energy density of the battery device 10.

[0151] In some embodiments, please refer to Figures 6 to 8 , and in combination with other drawings. N≥40.

[0152] Specifically, N can be 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, etc.

[0153] By N≥40, under the condition that the maximum dimension of the two first inner walls 2111 in the first direction X is predetermined, the maximum dimension of the battery monomer 11 in the first direction X will not be too large, so that the battery monomer 11 has a relatively low heat generation and a relatively high heat dissipation capacity, which is beneficial to prolong the service life of the battery device 10.

[0154] In some embodiments, please refer to Figures 6 to 8 , and in combination with other drawings. N≤150.

[0155] It can be understood that 40≤N≤150, and N can be 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, etc.

[0156] In this way, the maximum size of the battery cell 11 in the first direction X is neither too large nor too small, and the number of battery cells 11 in each row is appropriate, while the maximum size of the two first inner walls 2111 in the first direction X is predetermined. In this way, on the one hand, the battery cell 11 can have a lower heat generation and a higher heat dissipation capacity, which is conducive to prolonging the service life of the battery device 10. On the other hand, the grouping efficiency of each row of battery cells 11 in the first direction X can be improved, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the first direction X, which helps to improve the space utilization of the battery device 10 and is conducive to improving the energy density of the battery device 10. In this way, the battery device 10 can have the advantages of high heat dissipation capacity and high energy density.

[0157] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. M ∈ [3, 8].

[0158] It can be understood that M can be 3, 4, 5, 6, 7 or 8.

[0159] In this way, each column of battery cells 11 has an appropriate number of battery cells 11, and the battery cells 11 have an appropriate maximum size in the second direction Y, so that each column of battery cells 11 can be arranged more compactly in the box 2 along the second direction Y. In this way, on the one hand, because the battery cell 11 has an appropriate maximum size in the second direction Y, the battery cell 11 can have an appropriate length of the overcurrent path, which can improve the problem that the battery cell 11 has a very large heat generation due to the overcurrent path being too large, so that the heat generation of the battery cell 11 is within a more optimal range, so that the maximum temperature of the battery cell 11 is within a more optimal range, which is conducive to prolonging the service life of the battery device 10. On the other hand, because each column of battery cells 11 has an appropriate number of battery cells 11, each column of battery cells 11 has a higher grouping efficiency in the second direction Y, for example, but not limited to, it can save the parts between the adjacent battery cells 11 along the second direction Y, save the arrangement of the shell 1121 of the battery cell 11 in the second direction Y, and reduce the problem of space waste caused by the arrangement tolerance between adjacent battery cells 11, so that the battery cell array 1 can fully utilize the internal space of the box 2 in the second direction Y, which helps to improve the space utilization of the battery device 10 and is conducive to improving the energy density of the battery device 10. In this way, the performance and reliability of the battery device 10 can be improved, so that the battery device 10 can have high-efficiency fast-charging capability.

[0160] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 6 , Figure 7 andFigure 11 , and in conjunction with other drawings. Wherein, Figure 11 is a partial schematic view of the battery device 10 according to some embodiments of the present application, specifically a partial schematic view of the battery device 10 in a third direction Z. The battery device 10 has a length direction a and a width direction b, and the length of the battery device 10 is greater than the width of the battery device 10.

[0161] It can be understood that the battery device 10 is approximately a rectangular structure, that is, the box 2 is approximately a rectangular structure, so that the battery device 10 has a length direction a and a width direction b.

[0162] The length of the battery device 10 is greater than the width of the battery device 10 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.

[0163] In some possible designs, as shown in Figure 7 , the second direction Y is the length direction a of the battery device 10. Wherein, the maximum dimension of the battery device 10 along the second direction Y can be the length of the battery device 10. The first direction X can be but is not limited to the width direction b of the battery device 10, and the maximum dimension of the battery device 10 along the first direction X can be the width of the battery device 10, that is, the fifth size L5 below can be the width of the battery device 10.

[0164] Alternatively, in some other possible designs, as shown in Figure 11 , the second direction Y is the width direction b of the battery device 10. Wherein, the maximum dimension of the battery device 10 along the second direction Y can be the width of the battery device 10. The first direction X can be but is not limited to the length direction a of the battery device 10, and the maximum dimension of the battery device 10 along the first direction X can be the length of the battery device 10, that is, the fifth size L5 below can be the length of the battery device 10.

[0165] By adopting the above technical solutions, the battery cell array 1 can be arranged in the box 2 according to requirements, which can improve the arrangement flexibility and convenience of the battery cell array 1 in the box 2.

[0166] In some embodiments, please refer to Figure 7 , and in conjunction with other drawings. The second direction Y is the walking direction c of the power consumption device having the battery device 10.

[0167] As an example, when the power consumption device is a vehicle 3000, the walking direction c of the power consumption device is the length extension direction of the vehicle 3000, that is, the driving direction of the vehicle 3000.

[0168] It can be understood that when the second direction Y is the length direction a of the battery device 10, as Figure 7As shown, the length direction a of the battery device 10 is the travel direction c of the power-consuming 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 travel direction c of the power-consuming device.

[0169] In some embodiments, please refer to Figure 11 And in conjunction with other accompanying drawings. The first direction X is the travel direction c of the power-consuming device having the battery device 10.

[0170] Understandably, when the first direction X is the length direction a of the battery device 10, such as Figure 11 As shown, the length direction a of the battery device 10 is the travel direction c of the power-consuming device. The second direction Y intersects the length direction a of the battery device 10; for example, the second direction Y can be the width direction b of the battery device 10.

[0171] When the first direction X is the width direction b of the battery device 10, the width direction b of the battery device 10 is the traveling direction c of the power-consuming device. The second direction Y intersects the width direction b of the battery device 10; for example, the second direction Y is the length direction a of the power-consuming device.

[0172] By adopting the above technical solution, the battery cell array 1 can be arranged in the housing 2 as needed, which can improve the flexibility and convenience of the battery device 10 in the power supply device.

[0173] In some embodiments, please refer to the following: Figures 5 to 10 In conjunction with other accompanying drawings, the battery cell 11 has a first surface 101 on both sides along the first direction X, and a second surface 102 on both ends along the second direction Y. The electrode terminal 111 extends out of the second surface 102, and the area of ​​the first surface 101 is larger than the area of ​​the second surface 102.

[0174] Understandably, each battery cell 11 has electrode terminals 111 at both opposite ends along the second direction Y. The main body 112 of the battery cell 11 has a first surface 101 at both opposite sides along the first direction X; that is, the outer casing 1121 has a first surface 101 at both opposite sides along the first direction X. The main body 112 of the battery cell 11 has a second surface 102 at both opposite ends along the second direction Y; that is, the outer casing 1121 has a second surface 102 at both opposite ends along the second direction Y, and the electrode terminals 111 extend from the second surface 102. The first surface 101 and the second surface 102 are both outer surfaces of the main body 112, which are also outer surfaces of the outer casing 1121.

[0175] The area of the first surface 101 is greater than the area of the second surface 102, so that the maximum dimension of the monomer body 112 along the first direction X is less than the maximum dimension of the monomer body 112 along the second direction Y, and then the maximum dimension of the battery monomer 11 along the first direction X is less than the maximum dimension (i.e., the third dimension L3) of the battery monomer 11 along the second direction Y, that is, the length of the battery monomer 11 is greater than the thickness of the battery monomer 11. In this way, the battery monomer 11 can have better heat dissipation capacity to reduce the maximum temperature of the battery monomer 11, thereby prolonging the service life of the battery device 10.

[0176] In some embodiments, please refer to Figures 5 to 8 , and in combination with other drawings. The maximum dimension of the battery monomer 11 along the first direction X is the second dimension L2, and the second dimension L2 ∈ [10mm, 45mm].

[0177] Specifically, 10mm≤ the second dimension L2≤ 45mm, and the second dimension L2 can be 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, etc.

[0178] In this way, the battery monomer 11 has a smaller dimension along the first direction X. In this way, on the one hand, the battery monomer 11 can have higher heat dissipation capacity, which facilitates efficient heat dissipation of the battery monomer 11, which helps to reduce the temperature of the battery monomer 11, so that the maximum temperature of the battery monomer 11 can be within an optimal range, thereby prolonging the service life of the battery device 10. On the other hand, under the condition that the maximum dimension of the two first inner walls 2111 along the first direction X is predetermined, each row of battery monomers 11 has a suitable number of battery monomers 11, i.e., the value of N is suitable, so that each row of battery monomers 11 has higher grouping efficiency in the first direction X, for example, but not limited to, it can save parts between adjacent battery monomers 11 along the first direction X, and can reduce the problem of space waste caused by arrangement tolerance between adjacent battery monomers 11, thereby making the battery monomer array 1 can fully utilize the internal space of the box 2 in the first direction X, which helps to improve the space utilization of the battery device 10 and improve the energy density of the battery device 10. Therefore, by adopting the above technical solutions, the battery device 10 can have higher heat dissipation capacity and energy density, i.e., the battery device 10 can have the advantages of high heat dissipation capacity and high energy density.

[0179] In some embodiments, please refer to Figures 5 to 8 , and in combination with other drawings. The second dimension L2 ∈ [15mm, 30mm].

[0180] Specifically, 15mm≤ the second size L2≤ 30mm, and the second size L2 can be 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, etc.

[0181] By adopting the technical solution, the battery monomer 11 has a smaller size along the first direction X. In this way, on the one hand, the battery monomer 11 can have a higher heat dissipation capacity, so that the maximum temperature of the battery monomer 11 can be within a more optimal range. On the other hand, under the condition that the maximum size of the two first inner walls 2111 along the first direction X is predetermined, each row of battery monomers 11 has a more appropriate number of battery monomers 11, i.e., the value of N is more appropriate, so that each row of battery monomers 11 has a higher grouping efficiency along the first direction X, thereby enabling the battery monomer array 1 to fully utilize the internal space of the box body 2 along the first direction X, which helps to improve the space utilization of the battery device 10 and facilitate the improvement of the energy density of the battery device 10. Therefore, by adopting the technical solution, the battery device 10 can have a higher heat dissipation capacity and energy density.

[0182] In some embodiments, please refer to Figures 5 to 10 , and in combination with other drawings. The battery monomer 11 is provided with a third surface 103 at opposite ends along a third direction Z, and the area of the first surface 101 is greater than the area of the third surface 103. The third direction Z intersects the first direction X, and the third direction Z intersects the second direction Y.

[0183] It can be understood that the monomer body 112 is provided with a third surface 103 at opposite ends along the third direction Z, i.e., the outer shell 1121 is provided with a third surface 103 at opposite ends along the third direction Z. The third surface 103 is an outer surface of the monomer body 112, i.e., an outer surface of the outer shell 1121.

[0184] By making the area of the first surface 101 greater than the area of the third surface 103, the maximum size of the monomer body 112 along the third direction Z is greater than the maximum size of the monomer body 112 along the first direction X, i.e., the fourth size L4 below is greater than the second size L2, i.e., the width of the battery monomer 11 is greater than the thickness of the battery monomer 11. In this way, the battery monomer 11 can have a more optimal heat dissipation capacity to reduce the maximum temperature of the battery monomer 11.

[0185] As an example, as Figure 5As shown, and in conjunction with other figures. The third surface 103 is larger than the second surface 102. Based on this, the maximum dimension of the monomer body 112 along the second direction Y (i.e., the third dimension L3) is larger than the maximum dimension of the battery monomer 11 along the third direction Z (i.e., the fourth dimension L4), and the maximum dimension of the battery monomer 11 along the third direction Z is larger than the maximum dimension of the battery monomer 11 along the first direction X (i.e., the second dimension L2), that is, the length of the battery monomer 11 is larger than the width of the battery monomer 11, and the width of the battery monomer 11 is larger than the thickness of the battery monomer 11.

[0186] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10 , and in conjunction with other figures. The maximum dimension of the battery monomer 11 along the third direction Z is the fourth dimension L4, and the fourth dimension L4 ∈ [60mm, 160mm].

[0187] The maximum dimension of the battery monomer 11 along the third direction Z refers to the maximum dimension of the monomer body 112 of the battery monomer 11 along the third direction Z, that is, the maximum dimension of the shell 1121 along the third direction Z, which is the fourth dimension L4.

[0188] Specifically, 60mm ≤ the fourth dimension L4 ≤ 160mm, and the fourth dimension L4 can be 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, etc.

[0189] By adopting the above technical solution, the battery monomer 11 has a relatively appropriate maximum dimension in the third direction Z, which helps the battery monomer 11 to have a relatively optimal heat dissipation capacity, so as to reduce the highest temperature of the battery monomer 11. And, the battery monomer 11 is a short knife battery by such setting.

[0190] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10 , and in conjunction with other figures. The fourth dimension L4 ∈ [80mm, 130mm].

[0191] Specifically, 80mm ≤ the fourth dimension L4 ≤ 130mm, and the fourth dimension L4 can be 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, etc.

[0192] By adopting the above technical solution, the battery monomer 11 has a relatively appropriate maximum dimension in the third direction Z, which helps the battery monomer 11 to have a relatively optimal heat dissipation capacity, so as to reduce the highest temperature of the battery monomer 11.

[0193] In some embodiments, please refer to Figures 6 to 8 , and in combination with other drawings. The box 2 includes two first walls 211 oppositely arranged along the first direction X, the first inner wall 2111 is the inner wall of the first wall 211, and the outer wall of the first wall 211 is the first outer wall 2112. The maximum distance of the first outer wall 2112 of the two first walls 211 along the first direction X is the fifth size L5, and the second size L2*N / fifth size L5∈[0.744, 0.918].

[0194] The first wall 211 is a solid wall of the box 2, and the two first walls 211 are oppositely arranged along the first direction X. Among them, the wall surface of the two first walls 211 facing each other along the first direction X is the first inner wall 2111, and the wall surface of the two first walls 211 facing away along the first direction X is the first outer wall 2112.

[0195] Among them, the first wall 211 can be but not limited to an expansion beam in the box 2, used to resist the expansion of the battery monomer 11 along the second direction Y, so as to improve the reliability of the battery device 10.

[0196] The second size L2*N / fifth size L5∈[0.744, 0.918] means that 0.744≤second size L2*N / fifth size L5≤0.918, and the value of the second size L2*N / fifth size L5 can be 0.744, 0.75, 0.76, 0.77, 0.78, 0.79, 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.918, etc.

[0197] By adopting the above technical scheme, the battery monomer 11 has a relatively appropriate maximum size along the first direction X, and each row of battery monomers 11 has a relatively appropriate number of battery monomers 11. In this way, the battery device 10 has high heat dissipation capacity and high energy density.

[0198] In some embodiments, please refer to Figures 6 to 8 , and in combination with other drawings. The second size L2*N / fifth size L5∈[0.82, 0.918].

[0199] The second dimension L2*N / fifth dimension L5 is in the range of [0.82, 0.918], that is, 0.82≤second dimension L2*N / fifth dimension L5≤0.918, and the second dimension L2*N / fifth dimension L5 can be specifically 0.82, 0.825, 0.83, 0.835, 0.84, 0.845, 0.85, 0.855, 0.86, 0.865, 0.87, 0.875, 0.88, 0.885, 0.89, 0.895, 0.9, 0.905, 0.91, 0.915, 0.918, etc.

[0200] By adopting the above technical solutions, the battery monomer 11 has a relatively appropriate maximum dimension in the first direction X, and each row of battery monomers 11 has a relatively appropriate number of battery monomers 11. In this way, the highest temperature and the energy density of the battery device 10 are both in a relatively optimal range.

[0201] The following will be specifically described by specific experimental data:

[0202] In the experimental process, for example, the thickness extension direction of the battery monomer 11 is consistent with the first direction X, the length extension direction of the battery monomer 11 is consistent with the second direction Y, and the width extension direction of the battery monomer 11 is consistent with the third direction Z, and the specific data is shown in Table 1:

[0203] Table 1

[0204]

[0205]

[0206] From the above embodiments, it can be seen that when the second dimension L2*N / first dimension L1 is in the range of [0.771, 0.947] and the second dimension L2*N / fifth dimension L5 is in the range of [0.744, 0.918], the energy density of the battery device 10 is ≥260 Wh / L, and the highest temperature of the battery monomer 11 is less than 60℃. In this way, the highest temperature and the energy density of the battery device 10 are both in a relatively optimal range, that is, the battery device 10 has a relatively high energy density in the case that the highest temperature of the battery monomer 11 is relatively low, so that the battery device 10 can have the advantages of low temperature of the battery monomer 11 and high energy density of the power battery, and the battery device 10 can have high-efficiency fast-charging capability.

[0207] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10, and in conjunction with other drawings. The battery cell 11 includes at least one set of electrode terminals 111 at each of opposite ends thereof along the second direction Y, and each set of electrode terminals 111 includes positive electrode terminals 111a and negative electrode terminals 111b spaced apart along a third direction Z. The third direction Z is transverse to the first direction X and transverse to the second direction Y.

[0208] It can be appreciated that the battery cell 11 is provided with a plurality of electrode terminals 111 at each of opposite ends thereof along the second direction Y, and the plurality of electrode terminals 111 at each end of the battery cell 11 along the second direction Y are spaced apart along the third direction Z. Also, among the plurality of electrode terminals 111 at each end of the battery cell 11 along the second direction Y, each two of the plurality of electrode terminals 111 are grouped and different in polarity.

[0209] It can be appreciated that the battery cell 11 is provided with at least one set of electrode terminals 111 at one end thereof along the second direction Y, and the battery cell 11 is also provided with at least one set of electrode terminals 111 at the other end thereof along the second direction Y. Each set of electrode terminals 111 includes two electrode terminals 111 spaced apart along the third direction Z and different in polarity. That is, each set of electrode terminals 111 includes positive electrode terminals 111a and negative electrode terminals 111b spaced apart along the third direction Z.

[0210] By providing at least one set of electrode terminals 111 different in polarity at each end of the battery cell 11 along the second direction Y, the average overcurrent path of the battery cell 11 can be effectively shortened, and thus the internal resistance of the battery cell 11 can be reduced, the heat generation of the battery cell 11 can be reduced, the maximum temperature of the battery cell 11 can be reduced, and the performance and reliability of the battery device 10 can be improved.

[0211] As an example, as shown in Figure 5 , Figure 9 , Figure 10 and Figure 12 , and in conjunction with other drawings. Among them, Figure 12 is a perspective view of the battery cell array 1 of the battery device 10 provided by Figure 3 . The battery cell 11 is provided with a set of electrode terminals 111 at each end thereof along the second direction Y, and each set of electrode terminals 111 includes positive electrode terminals 111a and negative electrode terminals 111b spaced apart along a third direction Z.

[0212] As an example, as shown in Figure 12As shown, and in conjunction with other figures. The battery cell array 1 includes a plurality of rows of battery cells 11, i.e. the number of M is a plurality, the battery cell array 1 can include a first row of battery cells 11, a second row of battery cells 11, a third row of battery cells 11, …, a penultimate row of battery cells 11, and a last row of battery cells 11. As an example, in each row of battery cells 11, the respective end electrode terminals 111 of the battery cells 11 along the second direction Y are connected in series by the busbar component 3, so that each row of battery cells 11 has two total positive electrodes and total negative electrodes. The two total positive electrodes of the first row of battery cells 11 can be connected to serve as the total positive electrode of the battery cell array 1. The two total negative electrodes of the first row of battery cells 11 can connect the two total positive electrodes of the second row of battery cells 11 through the busbar component 3, the two total negative electrodes of the second row of battery cells 11 can connect the two total positive electrodes of the third row of battery cells 11 through the busbar component 3, and so on, the two total negative electrodes of the penultimate row of battery cells 11 can connect the two total positive electrodes of the last row of battery cells 11 through the busbar component 3, so that the first row of battery cells 11, the second row of battery cells 11, the third row of battery cells 11, …, the penultimate row of battery cells 11, and the last row of battery cells 11 are connected in series. The two total negative electrodes of the last row of battery cells 11 are connected to serve as the total negative electrode of the battery cell array 1.

[0213] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10 , and in conjunction with other figures. The battery cell 11 also includes a pressure relief mechanism 113.

[0214] 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 in communication with the gas outside. When the battery cell 11 is in thermal runaway due to internal and external factors such as overcharge, overdischarge, overheating, mechanical impact, etc., a large amount of high-temperature and high-pressure gas, flame, etc. high-temperature and high-pressure medium is generated inside the battery cell 11, so that the pressure inside the battery cell 11 is greater than the opening pressure value of the pressure relief mechanism 113, the pressure relief mechanism 113 changes from the closed state to the open state, and the high-temperature and high-pressure gas, flame, etc. high-temperature and high-pressure medium inside the battery cell 11 can be discharged to the outside of the battery cell 11 through the pressure relief mechanism 113.

[0215] The pressure relief mechanism 113 is arranged on the single body 112, and specifically, the pressure relief mechanism 113 can be arranged on the shell 1121 of the battery single 11. The pressure relief mechanism 113 can be a weak structure arranged on the shell 1121 of the battery single 11, or the pressure relief mechanism 113 can also be a pressure valve or the like structure. When the pressure relief mechanism 113 is a weak structure arranged on the shell 1121, the structural strength of the pressure relief mechanism 113 is lower than that of other positions of the shell 1121. In this way, when the battery single 11 occurs thermal runaway, the high-temperature and high-pressure gas, flame and other high-temperature and high-pressure media generated by the battery single 11 can break through the pressure relief mechanism 113 to be released to the outside of the battery single 11.

[0216] As shown in Figure 5 , the pressure relief mechanism 113 can be arranged on the end cover 11212 of the shell 1121. The pressure relief mechanism 113 can also be arranged on the shell body 11211 of the shell 1121.

[0217] In some possible designs, the pressure relief mechanism 113 can be integrally connected to the shell 1121, and a breakable mark is arranged between the pressure relief mechanism 113 and the shell 1121, which can be a notch or a breaking line. Alternatively, the pressure relief mechanism 113 is arranged on the shell 1121 in a split manner.

[0218] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10 , and combine with other drawings. The battery single 11 includes the above-mentioned pressure relief mechanism 113 at least at one end along the second direction Y, and the pressure relief mechanism 113 is distributed apart from the electrode terminal 111.

[0219] It can be understood that the shell 1121 is provided with the pressure relief mechanism 113 at least at one end along the second direction Y.

[0220] By arranging the pressure relief mechanism 113 at least at one end of the battery single 11 along the second direction Y, the internal space of the box body 2 can be effectively saved, so as to help improve the space utilization and energy density of the battery device 10. Moreover, in this way, it is also convenient to arrange the heat management component 212 at the opposite ends of the battery single array 1 along the third direction Z, and on this basis, the pressure relief mechanism 113 can effectively achieve the pressure relief effect of the battery single 11.

[0221] In some embodiments, please refer to Figures 7 to 10 , and combine with other drawings. N≥2, and in each row of battery singles 11, an insulating adhesive is arranged between adjacent two battery singles 11.

[0222] It can be understood that the two adjacent battery monomers 11 along the first direction X can be provided with insulating glue, specifically, the two adjacent battery monomers 11 along the first direction X can be provided with insulating glue between the outer shells 1121 of the two adjacent battery monomers 11.

[0223] In some embodiments, please refer to Figures 7 to 10 , and in combination with other drawings. M≥2, and in each column of battery monomers 11, the two adjacent battery monomers 11 are provided with insulating glue.

[0224] It can be understood that the two adjacent battery monomers 11 along the second direction Y can be provided with insulating glue.

[0225] Among them, the two adjacent battery monomers 11 along the second direction Y can be provided with insulating glue between the outer shells 1121 of the two adjacent battery monomers 11. The two adjacent battery monomers 11 along the second direction Y can also be provided with insulating glue between the electrode terminals 111 of the two adjacent battery monomers 11.

[0226] Among them, the insulating glue refers to a glue layer with insulating properties, which can be but is not limited to a structural glue, double-sided adhesive tape, etc.

[0227] By providing insulating glue between the two adjacent battery monomers 11, on the one hand, the insulating effect between the two adjacent battery monomers 11 can be achieved, the adverse effects between the two adjacent battery monomers 11 can be reduced, and the performance of the battery device 10 can be fully utilized. On the other hand, the two adjacent battery monomers 11 can be fixed by the insulating glue, which makes the fixing method of the battery monomer array 1 very simple, facilitates the assembly of the battery device 10, and can improve the production efficiency of the battery device 10. In addition, the insulating glue can play a protective role in the thermal runaway process of the battery monomer 11, and can improve the problem of high-pressure sparking caused by particulate matter spouted by the battery monomer 11.

[0228] In some embodiments, the first inner wall 2111 and the adjacent battery monomer 11 can also be provided with insulating glue to achieve insulating protection between the first inner wall 2111 and the battery monomer 11.

[0229] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10 , and in combination with other drawings. The battery monomer 11 is provided with a pressure relief mechanism 113, and the pressure relief mechanism 113 is distributed with the electrode terminal 111. At least part of the insulating glue is arranged on the electrode terminal 111, and avoids the pressure relief mechanism 113.

[0230] By arranging at least part of the insulating glue on the electrode terminal 111, the two adjacent battery monomers 11 can be insulated and fixed by the insulating glue. Moreover, by avoiding the pressure relief mechanism 113 by the insulating glue, the pressure relief mechanism 113 can achieve the pressure relief effect.

[0231] In some embodiments, please refer to Figure 5 , Figure 9 and Figure 10 , and in combination with other drawings. The pressure relief mechanism 113 and the electrode terminal 111 are spaced apart along the third direction Z. In the third direction Z, the insulating glue is beyond the electrode terminal 111 and is spaced apart from the pressure relief mechanism 113. Wherein, the third direction Z intersects the first direction X, and the third direction Z intersects the second direction Y.

[0232] It can be understood that at least part of the insulating glue is provided on the electrode terminal 111, the insulating glue is beyond the electrode terminal 111 along the third direction Z, and the insulating glue is spaced apart from the pressure relief mechanism 113 along the third direction Z.

[0233] In this way, the insulating glue is provided on the electrode terminal 111 and avoids the pressure relief mechanism 113, so that the insulating glue can realize insulation protection, fixation, thermal runaway protection and the like, and can guarantee the function of the pressure relief mechanism 113 to a certain extent.

[0234] As an example, as shown in Figure 5 , Figure 9 and Figure 10 , and in combination with other drawings. The box body 2 is provided with a second inner wall 2121 at one end along the third direction Z, and the second inner wall 2121 is an inner wall surface of the internal space of the box body 2. The second inner wall 2121 is connected between the two first inner walls 2111, and the battery cell array 1 is provided on the second inner wall 2121. The electrode terminal 111 is spaced apart between the pressure relief mechanism 113 and the second inner wall 2121 along the third direction Z, and the insulating glue is provided on the second inner wall 2121, the outer shell 1121 and the electrode terminal 111. The insulating glue is beyond the electrode terminal 111 along the third direction Z towards the pressure relief mechanism 113, and is spaced apart from the pressure relief mechanism 113 along the third direction Z.

[0235] It can be understood that the height of the insulating glue in the third direction Z is lower than the distance of the pressure relief mechanism 113 and the first inner wall 2111 in the third direction Z, so that the insulating glue can be filled between the two adjacent battery cells 11, and the pressure relief mechanism 113 is avoided.

[0236] In some embodiments, N≥2, and in each row of battery cells 11, a separation component 213 is provided between the two adjacent battery cells 11.

[0237] It can be understood that a separation component 213 can be arranged between two battery monomers 11 adjacent in the first direction X, specifically, a separation component 213 can be arranged between the housings 1121 of two battery monomers 11 adjacent in the first direction X, and a separation component 213 is arranged between the electrode terminals 111 of two battery monomers 11 adjacent in the first direction X, so that the separation component 213 separates the two battery monomers 11 adjacent in the first direction X.

[0238] In some embodiments, please refer to Figures 4 to 10 , and in combination with other drawings. M≥2, and in each column of battery monomers 11, a separation component 213 is arranged between two adjacent battery monomers 11.

[0239] It can be understood that a separation component 213 can be arranged between two battery monomers 11 adjacent in the second direction Y, specifically, a separation component 213 can be arranged between the electrode terminals 111 of two battery monomers 11 adjacent in the second direction Y, and the separation component 213 separates the electrode terminals 111 of two battery monomers 11 adjacent in the second direction Y.

[0240] By separating the two adjacent battery monomers 11 by the separation component 213, on the one hand, the separation component 213 can separate the high voltage between the two adjacent battery monomers 11, which can reduce the adverse effects between the two adjacent battery monomers 11, so that the battery device 10 can fully exert the performance. On the other hand, it can improve the overall strength of the battery monomer array 1, and can reduce the adverse effects of external factors such as vibration on the battery monomer array 1, so that the adaptability of the battery device 10 can be effectively strengthened.

[0241] In some embodiments, a separation component 213 can also be arranged between the first inner wall 2111 and the adjacent battery monomer 11, so that the separation component 213 separates the electrode terminal 111 of the battery monomer 11 and the first inner wall 2111. In this way, the high voltage of the battery monomer 11 and the box 2 can also be separated, the reliability of the battery device 10 can be improved, and the overall strength of the battery device 10 can be improved.

[0242] Among them, the separation component 213 can be but not limited to at least one of a heat conducting piece, a buffer piece, a separation plate, and a separation beam.

[0243] Specifically, the separation component 213 is arranged to be at least one of a heat conducting piece, a buffer piece, a separation plate, and a separation beam, which can be arranged according to different needs on the basis of separating the two adjacent battery monomers 11 or separating the battery monomer 11 and the first inner wall 2111, so as to meet the corresponding use requirements of the battery monomer array 1.

[0244] When the partition component 213 is a heat-conducting component, the partition component is arranged between two adjacent battery monomers 11 or between the first inner wall 2111 and the adjacent battery monomer 11, which can conduct the heat of the battery monomer 11 out of the battery monomer 11, thereby helping to dissipate the heat of the battery monomer 11 and reducing the maximum temperature of the battery monomer 11.

[0245] When the partition component 213 is a buffer component, the buffer component is arranged between two adjacent battery monomers 11 or between the first inner wall 2111 and the adjacent battery monomer 11. On the one hand, the buffer component can absorb the tolerance generated between the two adjacent battery monomers 11 or between the first inner wall 2111 and the battery monomer 11 during the manufacturing process, so as to effectively mount the battery monomer 11. On the other hand, the buffer component can provide a buffer between the two adjacent battery monomers 11 or between the first inner wall 2111 and the battery monomer 11, thereby reducing the damage of the battery monomer 11 due to extrusion. In addition, the buffer component can absorb the expansion of the battery monomer 11.

[0246] When the partition component 213 is a partition plate, the partition plate is arranged between two adjacent battery monomers 11 or between the first inner wall 2111 and the adjacent battery monomer 11. The partition plate separates the two adjacent battery monomers 11 or separates the first inner wall 2111 and the adjacent battery monomer 11, which can reduce the damage of the battery monomer 11 due to extrusion.

[0247] When the partition component 213 is a partition beam, the partition beam is arranged between two adjacent battery monomers 11 or between the first inner wall 2111 and the adjacent battery monomer 11. The partition beam separates the two adjacent battery monomers 11 or separates the first inner wall 2111 and the adjacent battery monomer 11, which can reduce the damage of the battery monomer 11 due to extrusion.

[0248] In some embodiments, when the insulating glue is arranged between two adjacent battery monomers 11 or between the first inner wall 2111 and the adjacent battery monomer 11, the insulating glue can be fixedly attached to the partition component 213.

[0249] In some embodiments, at least one end of the electrode terminal 111 along the second direction Y includes a pressure relief mechanism 113, and the pressure relief mechanism 113 and the partition component 213 are spaced apart and arranged opposite to each other along the second direction Y, so that the partition component 213 can achieve a certain degree of protection for the thermal runaway of the battery monomer 11.

[0250] In some embodiments, please refer to Figure 4 , Figure 6 , Figure 9 and Figure 10, and in combination with other drawings. The box body 2 further comprises a thermal management component 212, and the battery monomer array 1 is provided with the thermal management component 212 at least at one end along the third direction Z. The thermal management component 212 is connected with the battery monomer 11 to adjust the temperature of the battery monomer 11. Among them, the third direction Z intersects the first direction X, and the third direction Z intersects the second direction Y.

[0251] The thermal management component 212 refers to a component capable of achieving thermal management of the battery monomer array 1, which can be but is not limited to a water cooling plate, a water cooling pipe, etc. Among them, the thermal management component 212 can be provided with a flow channel for circulating a heat exchange medium, which can be but is not limited to water, oil, etc. The heat exchange medium can cool or heat manage the battery monomer array 1.

[0252] By providing the thermal management component 212 at least at one end of the battery monomer array 1 along the third direction Z, the thermal management component 212 at least at one end of the battery monomer array 1 along the third direction Z can manage the heat of the battery monomer array 1.

[0253] In some embodiments, please refer to Figure 4 , Figure 6 , Figure 9 and Figure 10 , and in combination with other drawings. The battery monomer array 1 is provided with the thermal management component 212 at opposite ends along the third direction Z. In this way, on the one hand, the thermal management efficiency of the battery monomer array 1 can be improved, thereby helping to reduce the maximum temperature of the battery monomer 11 of the battery device 10. On the other hand, it helps to improve the temperature uniformity of the battery monomer array 1, thereby helping to prolong the service life of the battery device 10.

[0254] It needs to be added here that among the two thermal management components 212, one thermal management component 212 is arranged on the first part 21, and the other thermal management component 212 is arranged on the second part 22. Among them, the second inner wall 2121 can be arranged on the thermal management component 212.

[0255] In some embodiments, the thermal management component 212 can be provided with an inlet and an outlet, and the heat exchange medium can enter the flow channel of the thermal management component 212 through the inlet and then flow out from the outlet to realize circulating flow.

[0256] In some embodiments, the distribution directions of the inlet and the outlet of one of the thermal management components 212 and the distribution directions of the inlet and the outlet of the other thermal management component 212 are substantially opposite. By arranging in this way, the heat exchange efficiency of the heat exchange medium in the thermal management component 212 and the battery monomer array 1 can be effectively improved, thereby helping to improve the thermal management efficiency of the battery monomer array 1, to help reduce the maximum temperature of the battery monomer 11, and in addition, to help improve the temperature uniformity of the battery monomer array 1.

[0257] The first wall 211 can be provided with an opening corresponding to the inlet and outlet of the heat management component 212, so as to facilitate the external heat exchange medium to enter and exit the heat management component 212 through the first wall 211.

[0258] Please refer to Figure 1 , and in combination with other drawings. The power consumption device provided by the embodiment of the present application comprises a battery device 10. In the embodiment, the battery device 10 is the same as the battery device 10 in the above embodiments, and the specific description is referred to the related description of the battery device 10 in the above embodiments, which is not repeated here.

[0259] The power consumption device provided by the embodiment of the present application adopts the above-mentioned battery device 10, so that the battery device 10 can have the advantages of high heat dissipation capacity and high energy density, thereby improving the performance and reliability of the battery device 10, so as to improve the performance and reliability of the power consumption device.

[0260] As one of the embodiments of the present application, as shown in Figures 4 to 10 , the battery device 10 comprises a box body 2 and a battery monomer array 1. The box body 2 comprises two first walls 211 oppositely arranged along a first direction X, and the first wall 211 is provided with a first inner wall 2111 and a first outer wall 2112 oppositely arranged along the first direction X. The maximum size of the first inner wall 2111 of the two first walls 211 in the first direction X is a first size L1, and the maximum size of the first outer wall 2112 of the two first walls 211 in the first direction X is a fifth size L5. The battery monomer array 1 comprises M*N battery monomers 11, and the M*N battery monomers 11 are arranged in an M row and N column array to form the battery monomer array 1. In the battery monomer array 1, the plurality of battery monomers 11 in each row are arranged along the first direction X, and the plurality of battery monomers 11 in each column are arranged along a second direction Y. The maximum size of the battery monomer 11 along the first direction X is a second size L2, the maximum size of the battery monomer 11 along the second direction Y is a third size L3, and the battery monomer 11 is provided with an electrode terminal 111 at opposite ends along the second direction Y. Wherein, M∈[3,8], N∈[40,150], M and N are positive integers. The third size L3∈[200mm,400mm], the second size L2*N / first size L1∈[0.771,0.947], and the second size L2*N / fifth size L5∈[0.744,0.918]. The first direction X and the second direction Y are perpendicular.

[0261] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising two first inner walls oppositely arranged along a first direction, the maximum distance between the two first inner walls along the first direction being a first size; a battery cell array arranged between the two first inner walls, the battery cell array comprising battery cells arranged in an M-row and N-column array, each row of the battery cells being arranged along the first direction, and each column of the battery cells being arranged along a second direction, the maximum size of the battery cells along the first direction being a second size, and at least one end of the battery cells along the second direction being provided with an electrode terminal; wherein M≥1, N≥1, M and N are positive integers; the second size*N / the first size∈[0.771, 0.947]; the first direction intersects the second direction; the box body comprises two first walls oppositely arranged along the first direction, the first inner walls being inner walls of the first walls, the outer walls of the first walls being first outer walls, the maximum distance between the first outer walls of the two first walls along the first direction being a fifth size, and the second size*N / the fifth size∈[0.744, 0.918].

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

3. The battery device of claim 1, wherein The maximum size of the battery cells along the second direction is a third size, and the third size≥200mm.

4. The battery device of claim 1, wherein The maximum size of the battery cells along the second direction is a third size, and the third size≤400mm.

5. The battery device according to any one of claims 1 to 4, characterized by, N≥40。 6. The battery device according to any one of claims 1 to 4, wherein N≤150。 7. The battery device according to any one of claims 1 to 4, wherein The battery device has a length direction and a width direction, the length of the battery device being 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.

8. The battery device according to any one of claims 1 to 4, wherein The second direction is the walking direction of an electric device having the battery device; or the first direction is the walking direction of an electric device having the battery device.

9. The battery device according to any one of claims 1 to 4, wherein The battery cells are provided with first surfaces on opposite sides along the first direction, and are provided with second surfaces on opposite ends along the second direction, the electrode terminals protruding from the second surfaces, and the area of the first surfaces being greater than the area of the second surfaces.

10. The battery device of claim 9, wherein, The second size∈[10mm, 45mm].

11. The battery device of claim 10, wherein, The second size∈[15mm, 30mm].

12. The battery device of claim 9, wherein, The battery cells are provided with third surfaces on opposite ends along a third direction, the area of the first surfaces being greater than the area of the third surfaces, and the third direction intersecting the first direction and the second direction respectively.

13. The battery device of claim 12, wherein, The maximum size of the battery cells along the third direction is a fourth size, and the fourth size∈[60mm, 160mm].

14. The battery device of claim 13, wherein, The fourth size∈[80mm, 130mm].

15. The battery device according to any one of claims 1 to 4, wherein The second size*N / the fifth size∈[0.82, 0.918].

16. The battery device according to any one of claims 1 to 4, wherein The opposite ends of the battery cells in the second direction each comprise at least one group of electrode terminals, one group of the electrode terminals comprising positive electrode terminals and negative electrode terminals spaced apart along a third direction; and the third direction intersects the first direction and the second direction respectively.

17. The battery device of any one of claims 1-4, wherein, At least one end of the battery monomer along the second direction comprises pressure relief mechanisms distributed apart from the electrode terminals.

18. The battery device according to any one of claims 1 to 4, wherein N≥2, and in each row of the battery monomers, two adjacent battery monomers are provided with insulating glue; And / or, M≥2, and in each column of the battery monomers, two adjacent battery monomers are provided with insulating glue.

19. The battery device of claim 18, wherein, The battery monomer is provided with pressure relief mechanisms distributed apart from the electrode terminals, and at least part of the insulating glue is arranged on the electrode terminals and avoids the pressure relief mechanisms.

20. The battery device of claim 19, wherein, The pressure relief mechanisms and the electrode terminals are distributed apart along a third direction, and in the third direction, the insulating glue exceeds the electrode terminals and is distributed apart from the pressure relief mechanisms; the third direction intersects the first direction and the second direction respectively.

21. The battery device of any one of claims 1-4, wherein, N≥2, and in each row of the battery monomers, two adjacent battery monomers are provided with separation components; And / or, M≥2, and in each column of the battery monomers, two adjacent battery monomers are provided with separation components.

22. The battery device of any one of claims 1-4, wherein, The box further comprises a heat management component arranged at at least one end of the array of battery monomers along a third direction, the heat management component being connected with the battery monomers to regulate the temperature of the battery monomers, the third direction intersecting the first direction and the second direction respectively.

23. An electrical device, comprising: A battery device according to any one of claims 1-22.

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