Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. The battery device comprises a box body, the box body comprises a first part and a second part which are connected with each other, and the first part and the second part jointly form an accommodating space; the plurality of single batteries are arranged in the accommodating space along the first direction; the first buffer part is connected with the first part and is positioned in the accommodating space; the second buffer part is connected with the second part and is positioned in the accommodating space; the first buffer part and the second buffer part are positioned on the same side of the battery monomer along a second direction, the first direction is intersected with the second direction, and the first buffer part and the second buffer part are different in impact strength. Through the mode, the impact strength of the side of the battery device can be improved, energy can be flexibly distributed according to the stress condition in the collision process, and impact force can be effectively absorbed and dispersed, so that the single batteries in the battery device are protected from being damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and an electric equipment. BACKGROUND

[0002] Electric energy is a very environmentally friendly energy, which is applied in energy storage, transportation, daily necessities, scientific research and other fields. Especially in the automobile industry, with the rise of new energy vehicles, batteries are widely used in the automobile industry. Therefore, battery technology is an important factor for social development.

[0003] In the development of battery technology, the safety performance of the battery device is an important factor in determining the quality of the battery device. In the existing battery device, the safety performance of the battery device is still insufficient and needs to be improved. CONTENT OF THE INVENTION

[0004] In view of the above problems, the present application provides a battery device and an electric equipment, which adds a first buffer part and a second buffer part in the box, and can solve the technical problem of insufficient safety performance of the battery.

[0005] To solve the above technical problems, one technical scheme adopted by the present application is to provide a battery device, which comprises: a box, the box comprising a first part and a second part connected together, the first part and the second part together forming a containing space; a plurality of battery monomers arranged in the containing space along a first direction; a first buffer part connected with the first part and located in the containing space; a second buffer part connected with the second part and located in the containing space; the first buffer part and the second buffer part are located on the same side of the battery monomers along a second direction, the first direction intersects with the second direction, and the impact resistance of the first buffer part and the second buffer part is different.

[0006] In the above manner, the impact resistance of the battery device in the lateral direction can be increased, and the energy can be flexibly distributed according to the stress condition during the collision, so as to effectively absorb and disperse the impact force, thereby protecting the battery monomers inside the battery device from being damaged.

[0007] In some embodiments, the first part comprises a top cover and a plurality of first side walls, each first side wall is connected with the top cover, and the plurality of first side walls are connected in sequence, the first buffer part is connected with at least one first side wall and part of the top cover, the second part comprises a bottom plate and a plurality of second side walls, each second side wall is connected with the bottom plate, and the plurality of second side walls are connected in sequence, and the second buffer part is connected with at least one second side wall and part of the bottom plate.

[0008] In the above manner, the first buffer part and the second buffer part can be connected and supported in two directions, thereby increasing the impact resistance of the first buffer part and the second buffer part.

[0009] In some embodiments, the first buffer part is connected to the first side wall and the top cover by bonding, and the second buffer part is connected to the second side wall and the bottom plate by bonding.

[0010] The connection by bonding can simplify the structure and has strong connection reliability.

[0011] In some embodiments, the first buffer part is located between the battery monomer and the first side wall, and the second buffer part is located between the battery monomer and the second side wall.

[0012] By this arrangement, the battery monomer can be buffered as much as possible before the impact is conducted to the battery monomer, thereby protecting the battery monomer.

[0013] In some embodiments, the battery monomer includes an electrode terminal; the electrode terminal is arranged towards the top cover, the impact resistance of the first buffer part is greater than that of the second buffer part; or, the electrode terminal is arranged towards the bottom plate, the impact resistance of the second buffer part is greater than that of the first buffer part.

[0014] This arrangement can protect the electrode terminal related parts in the battery device to the greatest extent, thereby enhancing the reliability of the battery device.

[0015] In some embodiments, the battery device further includes a heat management component arranged in the accommodation space and connected to the battery monomer, and the first buffer part and / or the second buffer part is provided with a avoiding part to avoid the heat management component.

[0016] The heat management component can improve the heat dissipation efficiency of the battery device, and the avoiding of the heat management component can ensure the heat management efficiency of the battery device through reasonable layout and space utilization on the basis of meeting the side impact protection requirements.

[0017] In some embodiments, the heat management component includes a water cooling plate, a current collector, and a pipeline, the pipeline is connected to the current collector, the current collector is connected to the water cooling plate, and the avoiding part avoids the current collector and the pipeline.

[0018] The current collector cooperates with the water cooling plate to better achieve the heat dissipation of the battery monomer, thereby improving the heat dissipation efficiency of the battery device.

[0019] In some embodiments, the water cooling plate is arranged crosswise with the battery monomer, a single water cooling plate is arranged along a second direction, a plurality of water cooling plates are arranged along a first direction, the current collector and the pipeline are located on opposite sides of the water cooling plate along the second direction, and the avoiding part provided on the first buffer part and / or the second buffer part avoids the current collector and the pipeline.

[0020] This arrangement is conducive to improving the heat dissipation efficiency of the large surface of the battery monomer and protecting the current collector and the pipeline.

[0021] In some embodiments, the battery device comprises an electrical connector arranged in the accommodating space, the electrical connector is connected to the battery cell, the first buffer portion is connected to one side of the top cover and is formed with a avoiding portion, and / or the first buffer portion is connected to one side of the bottom plate and is formed with a avoiding portion, and the avoiding portion avoids the arrangement of the electrical connector.

[0022] By forming the avoiding portion between the first buffer portion and the top cover and / or between the second buffer portion and the bottom plate, some lines and the like are allowed to pass through, and the lines and the like therein can be protected.

[0023] In some embodiments, the first surface of the first buffer portion is away from one side of the top cover, the second surface of the second buffer portion is away from one side of the bottom plate, the first surface and the second surface partially abut or are bonded, and the other part is arranged in a spaced manner.

[0024] This arrangement can allow the impact on the first buffer portion and the second buffer portion to be transmitted to each other, further improving the ability of the battery device to resist lateral impact.

[0025] In some embodiments, the first buffer portion and / or the second buffer portion is arranged in a spaced manner with the battery cell in the second direction.

[0026] This arrangement can allow the first buffer portion and / or the second buffer portion to have a certain buffer space after being impacted, and the impact will not be directly transmitted to the battery cell, thereby better protecting the battery cell.

[0027] In some embodiments, the first buffer portion and the second buffer portion are made of the same material but have different densities.

[0028] This way can simplify the selection of materials and thus simplify the process.

[0029] To solve the above technical problems, another technical solution adopted by the present application is to provide a power consumption device, which comprises the battery device described in any one of the above.

[0030] In the above manner, the power consumption device comprises the battery device described in any one of the above, which can increase the lateral impact resistance of the battery device, and can flexibly distribute energy according to the force condition during the collision, effectively absorb and disperse the impact force, thereby protecting the battery cell inside the battery device from being damaged.

[0031] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented in accordance with the content of the description, and in order to make the above content and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0033] Figure 1 Structure diagram of a vehicle according to one or more embodiments of the present application;

[0034] Figure 2 Structure diagram of a battery device according to one or more embodiments of the present application;

[0035] Figure 3 Structure diagram of a battery cell according to one or more embodiments of the present application;

[0036] Figure 4 Partial cross-sectional structure diagram of a battery device according to one or more embodiments of the present application;

[0037] Figure 5 is a bottom structure diagram of the first part of the box in Figure 4

[0038] Figure 6 is a structure diagram of the first buffer part in Figure 5

[0039] Wherein, 1000-vehicle; 100-battery device; 200-controller; 300-motor; 10-box; 11-first part; 111-top cover; 112-first side wall; 113-first connecting part; 12-second part; 121-bottom plate; 122-second side wall; 123-second connecting part; 20-battery cell; 21-housing; 211-end cap assembly; 212-outer shell; 211a-electrode terminal; 22-connector; 23-electrode assembly; 23a-tab; 24-insulating piece; 31-first buffer part; 32-second buffer part; 33-avoidance part; 40-thermal management component. DETAILED DESCRIPTION

[0040] The embodiments of the technical solutions of the present application will be described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0041] ​​Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and / or "comprising" when used herein shall mean "including, but not limited to."

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise explicitly and specifically limited, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0043] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents that the front and rear associated objects have an "or" relationship.

[0045] In the description of the embodiments of the present application, the technical terms "length", "above", "below", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mount", "connect", "connect", "fix" and other terms 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 embodiments of the present application can be understood according to the specific circumstances.

[0047] The battery device disclosed in the embodiments of the present application can be used in electric equipment such as vehicles, ships or aircraft, but is not limited to this. The power supply system of the electric equipment can be composed of the battery device disclosed in the present application and the like.

[0048] The battery device can supply power to the electric equipment as a power supply. The electric equipment can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0049] During use, the battery device is often subjected to impact from the side of the box body, and the battery cells inside are also subjected to impact from the side. In order to improve the impact resistance of the battery device, the side wall of the box body of the battery device is generally thickened. However, this method improves the side impact resistance of the battery device to a certain extent, but greatly increases the weight and cost of the battery device. Moreover, the side wall of the box body using this method is still a rigid structure, and the side impact resistance is still not as expected, so the safety performance of the battery device is still insufficient and needs to be improved.

[0050] Based on the above considerations, in order to solve the technical problem that the safety performance of the battery device in the prior art is still insufficient and needs to be improved, the present application provides a battery device and an electric equipment. In the box body of the battery device, there is a certain space between the battery cells and the side wall of the box body. This part of the space can be utilized, or the space can be expanded to accommodate a buffer material to form a buffer layer to enhance the side impact resistance of the battery device. This method can effectively buffer the impact received by the side of the battery device, effectively absorb and disperse the impact force, thereby protecting the battery cells inside the battery device from damage. Moreover, the impact that the battery cells at different positions can withstand is different, so the buffer part is divided into a first buffer part and a second buffer part corresponding to different parts of the box body, and the impact resistance is different. The energy can be flexibly distributed according to the force condition during the collision, and the first buffer part and the second buffer part can be set according to the requirements, thereby saving materials.

[0051] The following embodiments are described by taking a vehicle as an example of a power utilization device according to an embodiment of the present application.

[0052] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application.

[0053] The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0054] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0055] Please refer to Figure 2 , Figure 2 is a structural schematic diagram of a battery device according to one or more embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is accommodated in the box body 10. The box body 10 is used to provide an accommodation space for the battery cell 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12, and the first part 11 and the second part 12 are mutually covered. The first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-shaped structure, which is covered on the open side of the second part 12 to jointly define the accommodation space with the second part 12. The first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0056] In the battery device 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner refers to that the multiple battery cells 20 are connected in both series and parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the multiple battery cells 20 are accommodated in the box 10 as a whole. Of course, the battery device 100 can also be that the multiple battery cells 20 are connected in series, in parallel, or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole and are accommodated in the box 10. The battery device 100 can also include other structures. For example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20. Each battery cell 20 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.

[0057] Please refer to Figure 3 , Figure 3 is a structural schematic diagram of a battery cell according to one or more embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery device 100. As shown in FIG. 1, the battery cell 20 includes a positive electrode 21, a negative electrode 22, and a separator 23. The positive electrode 21 and the negative electrode 22 are connected by the separator 23, and the positive electrode 21 and the negative electrode 22 are respectively connected to the positive electrode terminal 24 and the negative electrode terminal 25. Figure 3As shown, the battery cell 20 includes a housing 21, an electrode assembly 23, and other functional components. The housing 21 includes an end cap assembly 211 and a shell 212 having an opening, and the end cap assembly 211 closes the opening. The end cap assembly 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap assembly 211 can be adapted to the shape of the shell 212 to fit the shell 212. Optionally, the end cap assembly 211 can be made of a material having certain hardness and strength, such as an aluminum alloy, so that the end cap assembly 211 is less likely to deform when subjected to a pressing impact, and the battery cell 20 can have higher structural strength and improved safety performance. The end cap assembly 211 can be provided with functional components such as an electrode terminal 211a. The electrode terminal 211a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electric energy of the battery cell 20. In some embodiments, the end cap assembly 211 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cap assembly 211 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member 24 can also be provided on the inner side of the end cap assembly 211, and the insulating member 24 can be used to isolate the electrically connected components in the shell 212 from the end cap assembly 211 to reduce the risk of short circuit. Exemplarily, the insulating member 24 can be plastic, rubber, etc. The shell 212 is a component used to fit the end cap assembly 211 to form the internal environment of the battery cell 20, and the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte, and other components. The shell 212 and the end cap assembly 211 can be independent components, and the shell 212 can be provided with an opening, and the end cap assembly 211 covers the opening to form the internal environment of the battery cell 20.

[0058] Without limitation, the end cap assembly 211 and the shell 212 can also be integrated, specifically, the end cap assembly 211 and the shell 212 can form a common connecting surface before other components enter the shell, and the end cap assembly 211 covers the shell 212 when it is necessary to seal the internal environment of the shell 212. The shell 212 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 212 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. The shell 212 can be provided with an electrode lead-out portion (not shown in the figure) for electrically connecting with the tab 23a for outputting or inputting the electric energy of the battery cell 20.

[0059] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained within the case 212. The electrode assembly 23 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 23, and portions without active materials that each constitute a tab 23a. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery device 100, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tab 23a is connected to the electrode terminal 211a by the connecting member 22 to form a current loop.

[0060] To solve the technical problem that the safety performance of the battery device is still insufficient and needs to be improved, the application provides a battery device and a power-using equipment. Please refer to Figure 4 With Figure 5 , Figure 4 is a schematic diagram of a partial cross-sectional structure of a battery device according to one or more embodiments of the application; Figure 5 is Figure 4 a schematic diagram of a first part of a case in FIG. 1. The battery device 100 includes a case 10, a plurality of battery cells 20, a first buffer portion 31, and a second buffer portion 32. The case 10 includes a first part 11 and a second part 12 connected together, and the first part 11 and the second part 12 together form a receiving space. The plurality of battery cells 20 are arranged in the receiving space along a first direction X. The first buffer portion 31 is connected to the first part 11 and is located in the receiving space. The second buffer portion 32 is connected to the second part 12 and is located in the receiving space. The first buffer portion 31 and the second buffer portion 32 are located on the same side of the battery cells 20 along a second direction Y, and the first direction X and the second direction Y intersect. The first buffer portion 31 and the second buffer portion 32 have different impact resistances.

[0061] The first direction X can be a length direction of the battery device 100, and the second direction Y can be a width direction of the battery device 100. The first direction X is a setting direction of the plurality of battery cells 20, but the battery cells 20 can be in multiple groups, and the battery cells 20 in each group are arranged along the first direction X, while the multiple groups of battery cells 20 can be arranged along the second direction Y. The first direction X can be perpendicular to the second direction Y. The opposite sides of the battery device 100 along the first direction X can be referred to as the front and back of the battery device 100, and the opposite sides of the battery device 100 along the second direction Y can be referred to as the sides of the battery device 100. The first buffer portion 31 and the second buffer portion 32 are portions formed of a buffer material and have the function of absorbing and dispersing impact forces transmitted from the outside. The impact resistance can directly reflect, evaluate, or judge the impact resistance of a material or product, including brittleness and toughness. The industry is more popular to test the impact resistance of materials or products by three methods: simply supported beam impact, cantilever beam impact, and drop ball impact. The first two methods are mainly used to judge the impact performance of the material itself, and the two methods have no substantial connection, the difference is that the cantilever beam impact is a little more severe, and the material that cannot be broken by the simply supported beam impact is generally selected by the cantilever beam impact; the drop ball or drop hammer impact reflects the impact resistance of the product itself. The impact resistance of a material or product is determined by factors such as material, thickness, and structure. The stronger the impact resistance, the stronger the ability to absorb and disperse impact forces transmitted from the outside; the weaker the impact resistance, the weaker the ability to absorb and disperse impact forces transmitted from the outside. The impact resistance of the first buffer portion 31 can be stronger than the impact resistance of the second buffer portion 32, and the impact resistance of the first buffer portion 31 can be weaker than the impact resistance of the second buffer portion 32. The impact resistance of the first buffer portion 31 affects the impact resistance of the first portion 11 of the box body 10, and the stronger the impact resistance of the first buffer portion 31, the stronger the impact resistance of the first portion 11 of the box body 10. The impact resistance of the second buffer portion 32 affects the impact resistance of the second portion 12 of the box body 10, and the stronger the impact resistance of the second buffer portion 32, the stronger the impact resistance of the second portion 12 of the box body 10. Different parts of the accommodation space inside the box body 10 accommodate different components, so the impact resistance of different positions of the box body 10 is different. Generally speaking, when the first portion 11 or the second portion 12 corresponds to an accommodation space with more welded parts, stronger impact resistance is required. Or, when the first portion 11 or the second portion 12 corresponds to an accommodation space with components that need to be protected, stronger impact resistance is required. Therefore, the impact resistance of the first buffer portion 31 or the second buffer portion 32 can be higher according to the requirements. The impact resistance of the first buffer portion 31 and the second buffer portion 32 can be achieved in various ways, such as by material selection, material distribution, structure arrangement, etc., and those skilled in the art can select according to actual requirements.

[0062] In this way, the impact resistance of the battery device 100 in the lateral direction can be increased, and the energy can be flexibly distributed according to the force condition during the collision, so that the impact force can be effectively absorbed and dispersed, thereby protecting the battery monomer 20 inside the battery device 100 from damage.

[0063] In some embodiments, the first part 11 includes a top cover 111 and a plurality of first side walls 112, each of which is connected to the top cover 111, and the plurality of first side walls 112 are sequentially connected, and the first buffer part 31 is connected to at least one first side wall 112 and part of the top cover 111. The second part 12 includes a bottom plate 121 and a plurality of second side walls 122, each of which is connected to the bottom plate 121, and the plurality of second side walls 122 are sequentially connected, and the second buffer part 32 is connected to at least one second side wall 122 and part of the bottom plate 121.

[0064] The top cover 111 and the first side wall 112 can be an integrally formed structure formed by stamping or the like, or can be connected by welding or the like. The plurality of first side walls 112 are arranged in a ring shape. The first buffer part 31 is fixedly connected to the top cover 111 and the first side wall 112, so that the adjacent two sides of the first buffer part 31 are fixedly supported. When the first buffer part 31 is subjected to the impact force conducted by the first side wall 112, a part of the impact force can be conducted to the top cover 111 connected thereto. The first buffer part 31 is connected to at least one first side wall 112, which can be that the first buffer part 31 covers one first side wall 112, and then the two ends are connected to other first side walls 112 connected to the first side wall 112. Alternatively, the first buffer part 31 is provided with two, which are respectively connected to the oppositely arranged first side walls 112. Alternatively, the first buffer part 31 is provided with three or more, which are respectively connected to different first side walls 112. The bottom plate 121 and the second side wall 122 can be an integrally formed structure formed by stamping or the like, or can be connected by welding or the like. The bottom plate 121 is oppositely arranged with the top cover 111, and the second side wall 122 is connected with the first side wall 112. The plurality of second side walls 122 are arranged in a ring shape. The second buffer part 32 is fixedly connected to the bottom plate 121 and the second side wall 122, so that the adjacent two sides of the second buffer part 32 are fixedly supported. When the second buffer part 32 is subjected to the impact force conducted by the second side wall 122, a part of the impact force can be conducted to the bottom plate 121 connected thereto. The second buffer part 32 is connected to at least one second side wall 122, which can be that the second buffer part 32 covers one second side wall 122, and then the two ends are connected to other second side walls 122 connected to the second side wall 122. Alternatively, the second buffer part 32 is provided with two, which are respectively connected to the oppositely arranged second side walls 122. Alternatively, the second buffer part 32 is provided with three or more, which are respectively connected to different second side walls 122.

[0065] In this way, the first buffer portion 31 and the second buffer portion 32 can be connected and supported in two directions, thereby increasing the impact resistance of the first buffer portion 31 and the second buffer portion 32.

[0066] In some embodiments, the first buffer portion 31 is connected to the first side wall 112 and the top cover 111 by bonding, and the second buffer portion 32 is connected to the second side wall 122 and the bottom plate 121 by bonding.

[0067] Bonding is a connection by pasting. For example, the first buffer portion 31 and the second buffer portion 32 can be connected to other components by structural glue. According to needs, other glues can also be used for bonding, as long as the first buffer portion 31 can be firmly pasted on the first side wall 112 and the top cover 111, and the second buffer portion 32 can be firmly pasted on the second side wall 122 and the bottom plate.

[0068] The connection by bonding can simplify the structure and has strong connection reliability.

[0069] In some embodiments, the first buffer portion 31 is located between the battery monomer 20 and the first side wall 112, and the second buffer portion 32 is located between the battery monomer 20 and the second side wall 122.

[0070] The battery monomer 20 has a certain space between the first side wall 112 and the second side wall 122. The first buffer portion 31 and the second buffer portion 32 are arranged at this position, which can completely shield the battery monomer 20 from the side.

[0071] In this way, the impact can be buffered as much as possible before it is conducted to the battery monomer 20, thereby protecting the battery monomer 20.

[0072] In some embodiments, the battery monomer 20 includes an electrode terminal 211a. The electrode terminal 211a is arranged towards the top cover 111, and the impact resistance of the first buffer portion 31 is greater than that of the second buffer portion 32. Alternatively, the electrode terminal 211a is arranged towards the bottom plate 121, and the impact resistance of the second buffer portion 32 is greater than that of the first buffer portion 31.

[0073] The electrode terminal 211a of the battery cell 20 needs to be connected to a busbar member or the like, and the position of the connection is relatively weak. When the electrode terminal 211a is arranged toward the top cover 111, the first buffer portion 31 corresponds to the position of the electrode terminal 211a, and thus the impact resistance of the first buffer portion 31 needs to be greater than that of the second buffer portion 32. When the electrode terminal 211a is arranged toward the bottom plate 121, the second buffer portion 32 corresponds to the position of the electrode terminal 211a, and thus the impact resistance of the second buffer portion 32 needs to be greater than that of the first buffer portion 31.

[0074] This arrangement can protect the position related to the electrode terminal 211a in the battery device 100 to the greatest extent, thereby enhancing the reliability of the battery device 100.

[0075] Please further refer to Figure 6 , Figure 6 for Figure 5 a structural diagram of the first buffer portion. In some embodiments, the battery device 100 further comprises a thermal management member 40. The thermal management member 40 is arranged in the accommodation space and connected to the battery cell 20. The first buffer portion 31 and / or the second buffer portion 32 is provided with a relief portion 33, thereby avoiding the thermal management member 40.

[0076] The heat management component 40 is used to adjust the temperature of the battery cell 20, and the heat management component 40 is provided with a flow channel for circulating the heat exchange medium or an internal cavity for containing the heat exchange medium. The heat exchange medium is generally a fluid for adjusting the temperature of the battery cell 20, and the fluid can be a liquid or a gas. The adjustment of the temperature means heating or cooling the battery cell 20. In the case of cooling the battery cell 20, the heat exchange medium can also be referred to as a cooling medium or a cooling fluid, and more specifically, a cooling liquid or a cooling gas. In addition, the heat exchange medium can also warm the battery cell 20. Optionally, the fluid can be circulated to achieve better temperature adjustment. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc. In some battery devices 100, a large-area water-cooled plate or other heat management component 40 can be provided to cool the battery cell 20. These heat management components 40 are partially arranged between the battery cell 20 and the first side wall 112, or between the battery cell 20 and the second side wall 122, or between the battery cell 20 and the first side wall 112 and the second side wall 122. Therefore, according to the actual arrangement of the heat management component 40, the first buffer portion 31 is provided with a relief portion 33, or the second buffer portion 32 is provided with a relief portion 33, or both the first buffer portion 31 and the second buffer portion 32 are provided with a relief portion 33. The relief portion 33 can be a recessed structure, such as a groove structure, etc. The relief portion 33 is generally arranged on the side of the first buffer portion 31 and the second buffer portion 32 facing the battery cell 20, and can also be arranged on the side of the first buffer portion 31 facing the second buffer portion 32, or on the side of the second buffer portion 32 facing the first buffer portion 31.

[0077] The heat management component 40 can improve the heat dissipation efficiency of the battery device 100. The relief of the heat management component 40 ensures that the battery device 100 meets the side impact protection requirements, and through reasonable layout and space utilization, the heat management efficiency of the battery device 100 is also guaranteed.

[0078] In some embodiments, the heat management component 40 includes a water-cooled plate, a current collector, and a pipe. The pipe is connected to the current collector, and the current collector is connected to the water-cooled plate. The relief portion 33 relieves the current collector and the pipe.

[0079] The current collector connects multiple water-cooled plates. The water-cooled plates can be round tubes or flat tubes. In the embodiment where the water-cooled plates are flat tubes, multiple flow channels for the heat exchange medium to flow through can be arranged inside the water-cooled plates. In this embodiment, the water-cooled plates can also be referred to as harmonicas. The current collector can be a round tube or a flat tube, and has flow channels inside that are connected to the flow channels inside the water-cooled plates, so that the heat exchange medium can flow between the current collector and the water-cooled plates. The thermal management component 40 can be integrally formed or separately formed. In the embodiment where the thermal management component 40 includes the current collector and the water-cooled plates, the current collector and the water-cooled plates can be integrally cast to form the thermal management component 40. The current collector and the water-cooled plates can also be connected to each other by welding to form the thermal management component 40. The pipes can be connected to the adjacent two current collectors by welding, clamping, and / or bonding.

[0080] By matching the current collector with the water-cooled plates, the heat dissipation of the battery monomer 20 can be better achieved, thereby improving the heat dissipation efficiency of the battery device 100.

[0081] In some embodiments, the water-cooled plates are arranged across the battery monomers 20. A single water-cooled plate is arranged along the second direction Y, and multiple water-cooled plates are arranged along the first direction X. The current collector and the pipe are located on opposite sides of the water-cooled plate along the second direction Y. The avoiding portion 33 arranged on the first buffer portion 31 and / or the second buffer portion 32 avoids the current collector and the pipe.

[0082] The water-cooled plates can be flat and long strip-shaped structures arranged corresponding to the large faces of the battery monomers 20. The battery monomers 20 are arranged along the first direction X, and their large faces are located on the second direction Y. Along the first direction X, a water-cooled plate is arranged between adjacent battery monomers 20, and adjacent water-cooled plates clamp a battery monomer 20. The current collector and the pipe are located on opposite sides of the water-cooled plate along the second direction Y, i.e., the current collector and the pipe are located on both sides of the battery monomer 20 along the second direction Y. The first buffer portion 31 and the second buffer portion 32 are also arranged on the sides of the battery monomer 20 along the second direction Y. Therefore, the avoiding portion 33 can be arranged on the first buffer portion 31 and / or the second buffer portion 32 to avoid the current collector and the pipe.

[0083] This arrangement is conducive to improving the heat dissipation efficiency of the large faces of the battery monomers 20 and protecting the current collector and the pipe to a certain extent.

[0084] In some embodiments, the battery device 100 includes an electrical connector (not shown) arranged in the accommodation space. The electrical connector connects the battery monomers 20. The avoiding portion 33 is arranged on the side of the first buffer portion 31 connected to the top cover 111, and / or the avoiding portion 33 is arranged on the side of the first buffer portion 31 connected to the bottom plate 121 to avoid the arrangement of the electrical connector.

[0085] Some wires, copper bars and other electrical connectors can be arranged in the battery device 100, and arranged on the side of the box 10, close to the top cover 111 or the bottom plate 121. Therefore, the avoiding part 33 is formed at the position corresponding to the wires, so as to protect the wires while allowing the wires to pass through. The position of the avoiding part 33 is determined according to the arrangement position of the wires and other components. For example, when the wires are arranged on the top cover 111, the avoiding part 33 is formed on the side of the first buffer part 31 connecting the top cover 111. When the wires are arranged on the bottom plate 121, the avoiding part 33 is formed on the side of the second buffer part 32 connecting the bottom plate 121. When the wires are arranged on both the top cover 111 and the bottom plate 121, or can be arranged on the top cover 111 or the bottom plate 121, the avoiding part 33 is formed on the side of the first buffer part 31 connecting the top cover 111 and the side of the second buffer part 32 connecting the bottom plate 121. Similarly, the avoiding part 33 can be a recess structure, such as a groove structure.

[0086] The avoiding part 33 is formed between the first buffer part 31 and the top cover 111 and / or between the second buffer part 32 and the bottom plate 121, so as to allow some wires to pass through and protect the wires.

[0087] In some embodiments, the side of the first buffer part 31 away from the top cover 111 is a first surface, the side of the second buffer part 32 away from the bottom plate 121 is a second surface, and the first surface and the second surface are partially in contact or bonded, and partially spaced apart.

[0088] This arrangement can make the impact on the first buffer part 31 and the second buffer part 32 be transmitted to each other, and further improve the ability of the battery device 100 to resist side impact.

[0089] In some embodiments, the first buffer part 31 and / or the second buffer part 32 are spaced apart from the battery cell 20 in the second direction Y.

[0090] The first buffer part 31 is not in contact with the battery cell 20, or the second buffer part 32 is not in contact with the battery cell 20, or both the first buffer part 31 and the second buffer part 32 are not in contact with the battery cell 20. When the impact on the side of the battery device 100 reaches the first buffer part 31 or the second buffer part 32, the first buffer part 31 and the second buffer part 32 can displace a certain distance towards the battery cell 20, and if the first buffer part 31 and the second buffer part 32 are spaced apart from the battery, they will not press or impact the battery cell 20 at first, and have a certain space to buffer.

[0091] In this way, the first buffer portion 31 and / or the second buffer portion 32 still has a certain buffer space after being impacted, and the impact is not directly transmitted to the battery monomer 20, thereby better protecting the battery monomer 20.

[0092] In some embodiments, the first side wall 112 is formed with a first connecting portion 113 away from one side of the top cover 111, and the first connecting portion 113 extends along the first side wall 112 away from the accommodation space. The second side wall 122 is formed with a second connecting portion 123 away from one side of the bottom plate 121, and the second connecting portion 123 extends along the second side wall 122 away from the accommodation space. The first connecting portion 113 is connected with the second connecting portion 123.

[0093] The first connecting portion 113 and the second connecting portion 123 are components for mutual connection, connecting and fixing the first part 11 and the second part 12 of the box 10. The first connecting portion 113 and the second connecting portion 123 can be directly connected, for example, by welding, bonding. The connection can also be achieved by a clamping method or by a fixing member such as a bolt or a rivet.

[0094] In this way, the first part 11 and the second part 12 can be better connected.

[0095] In some embodiments, the first buffer portion 31 and the second buffer portion 32 are made of the same material but have different densities.

[0096] For example, the first buffer portion 31 and the second buffer portion 32 can both use foam, or both use resin, rubber or other materials, and the impact resistance of the first buffer portion 31 and the second buffer portion 32 is different by setting different densities. Different density settings can be achieved by, for example, adding bubbles to the material, or some materials themselves have multiple different densities. In other embodiments, the first buffer portion 31 and the second buffer portion 32 can also use different materials to achieve different impact resistances of the first buffer portion 31 and the second buffer portion 32.

[0097] In this way, the selection of materials can be simplified, thereby simplifying the process.

[0098] To solve the above technical problems, another technical solution adopted by the present application is to provide an electric device, which comprises the battery device 100 described in any one of the above embodiments.

[0099] In the above manner, the electric device comprises the battery device 100 described in any one of the above embodiments, which can increase the impact resistance of the battery device 100 in the lateral direction, and can flexibly distribute energy during the collision process according to the stress condition, effectively absorbing and dispersing the impact force, thereby protecting the battery monomer 20 inside the battery device 100 from being damaged.

[0100] Finally, in a specific application scenario, in order to solve the problem that the safety performance of the battery device 100 is still insufficient and needs to be improved, the application provides a battery device 100 and a power consumption equipment. The battery device 100 comprises a box body 10, a battery monomer 20, a first buffer part 31 and a second buffer part 32. The box body 10 comprises a first part 11 and a second part 12 connected together, and the first part 11 and the second part 12 jointly form a containing space, and the battery monomer 20, the first buffer part 31 and the second buffer part 32 are all arranged in the containing space. The first buffer part 31 is connected with the first part 11, and the second buffer part 32 is connected with the second part 12. The first buffer part 31 and the second buffer part 32 are located on the same side of the battery monomer 20, and the impact resistance of the first buffer part 31 and the second buffer part 32 is different. The first part 11 comprises a top cover 111 and a plurality of first side walls 112, each first side wall 112 is connected with the top cover 111, and the plurality of first side walls 112 are connected in sequence, and the first buffer part 31 is connected with at least one first side wall 112 and part of the top cover 111. The second part 12 comprises a bottom plate 121 and a plurality of second side walls 122, each second side wall 122 is connected with the bottom plate 121, and the plurality of second side walls 122 are connected in sequence, and the second buffer part 32 is connected with at least one second side wall 122 and part of the bottom plate. The first buffer part 31 is connected with the first side wall 112 and the top cover 111 by bonding, and the second buffer part 32 is connected with the second side wall 122 and the bottom plate 121 by bonding. The battery monomer 20 comprises an electrode terminal 211a. The electrode terminal 211a is arranged towards the top cover 111, and the impact resistance of the first buffer part 31 is greater than that of the second buffer part 32. Alternatively, the electrode terminal 211a is arranged towards the bottom plate 121, and the impact resistance of the second buffer part 32 is greater than that of the first buffer part 31. The battery device 100 further comprises a thermal management part 40. The thermal management part 40 is arranged in the containing space and connected with the battery monomer 20. The first buffer part 31 and / or the second buffer part 32 is provided with a avoiding part 33, so as to avoid the thermal management part 40. The side of the first buffer part 31 away from the top cover 111 is bonded with the side of the second buffer part 32 away from the bottom plate 121. The first buffer part 31 and the second buffer part 32 are made of the same material but have different densities.

[0101] By the above-mentioned manner, the impact resistance of the battery device 100 in the lateral direction can be increased, and the energy can be flexibly distributed according to the stress condition during the collision, so as to effectively absorb and disperse the impact force, thereby protecting the battery monomer 20 inside the battery device 100 from being damaged. By the above-mentioned manner, the first buffer part 31 and the second buffer part 32 can be connected and supported in two directions, thereby increasing the impact resistance of the second buffer part 32. The connection by bonding can simplify the structure and has strong connection reliability. This arrangement can protect the part related to the electrode terminal 211a in the battery device 100 to the greatest extent, thereby enhancing the reliability of the battery device 100. The heat management component 40 can improve the heat dissipation efficiency of the battery device 100, and the avoidance of the heat management component 40 can make the battery device 100 meet the side impact protection requirement, and through reasonable layout and space utilization, the heat management efficiency of the battery device 100 is also guaranteed. This arrangement can make the impact on the first buffer part 31 and the second buffer part 32 can be transmitted to each other, further improving the ability of the battery device 100 to resist lateral impact. This manner can simplify the selection of materials, thereby simplifying the process.

[0102] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a first part and a second part connected together, the first part and the second part jointly forming a containing space; a plurality of battery cells arranged in the containing space along a first direction; a first buffer part connected to the first part and located in the containing space; a second buffer part connected to the second part and located in the containing space; the first buffer part and the second buffer part are located on the same side of the battery cells along a second direction, the first direction intersects the second direction, and the impact resistance of the first buffer part and the second buffer part is different.

2. The battery device according to claim 1, characterized by The first part comprises a top cover and a plurality of first side walls, each of the first side walls is connected to the top cover, and the plurality of first side walls are connected in sequence, the first buffer part is connected to at least one first side wall and part of the top cover, the second part comprises a bottom plate and a plurality of second side walls, each of the second side walls is connected to the bottom plate, and the plurality of second side walls are connected in sequence, and the second buffer part is connected to at least one second side wall and part of the bottom plate.

3. The battery device of claim 2, wherein The first buffer part is connected to the first side wall and the top cover by bonding, and the second buffer part is connected to the second side wall and the bottom plate by bonding.

4. The battery device of claim 2, wherein The first buffer part is located between the battery cells and the first side wall, and the second buffer part is located between the battery cells and the second side wall.

5. The battery device of claim 4, wherein, The battery cells comprise electrode terminals; the electrode terminals are arranged towards the top cover, the impact resistance of the first buffer part is greater than that of the second buffer part; or the electrode terminals are arranged towards the bottom plate, and the impact resistance of the second buffer part is greater than that of the first buffer part.

6. The battery device of claim 4, wherein The battery device further comprises a heat management component arranged in the containing space and connected to the battery cells, and the first buffer part and / or the second buffer part is provided with a avoiding part to avoid the heat management component.

7. The battery device of claim 6, wherein The heat management component comprises a plurality of water-cooled plates, a plurality of current collectors, and a pipeline, the end of the water-cooled plate is in communication with the current collector, adjacent current collectors are in communication with each other through the pipeline, and the avoiding part avoids the current collector and the pipeline.

8. The battery device of claim 7, wherein, The water-cooled plates and the battery cells are arranged in cross, a single water-cooled plate is arranged along the second direction, a plurality of water-cooled plates are arranged along the first direction, the current collector and the pipeline are located on opposite sides of the water-cooled plate along the second direction, and the avoiding part provided on the first buffer part and / or the second buffer part avoids the current collector and the pipeline.

9. The battery device of claim 4, wherein, The battery device comprises an electrical connector arranged in the containing space, the electrical connector is connected to the battery cells, the avoiding part is formed on one side of the top cover connected to the first buffer part, and / or the avoiding part is formed on one side of the bottom plate connected to the first buffer part, and the avoiding part avoids the arrangement of the electrical connector.

10. The battery device of claim 3, wherein The first buffer portion has a first surface away from the top cover, and the second buffer portion has a second surface away from the bottom plate. The first surface and the second surface partially abut or are bonded, and the other part is spaced apart.

11. The battery device according to any one of claims 1 to 10, wherein The first buffer portion and / or the second buffer portion are spaced apart from the battery cell in the second direction.

12. The battery device according to any one of claims 1 to 10, wherein The first buffer portion and the second buffer portion are made of the same material but have different densities.

13. An electrical device, characterized by The power consumption device comprises the battery device according to any one of claims 1-12.

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