Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery box, a limiting piece, a battery monomer assembly and an energy absorption structure, wherein an accommodating cavity is formed in the battery box; the limiting piece is arranged in the containing cavity and divides the containing cavity into a first cavity body and a second cavity body. The battery monomer assembly comprises a plurality of battery monomers, and the plurality of battery monomers are arranged in the first cavity; the energy absorption structure is arranged in the second cavity; the battery box is provided with a first box wall, the first box wall and the limiting piece are oppositely arranged in a spaced mode, and the first box wall and the limiting piece are arranged to define a second cavity; the energy absorption structure comprises a plurality of rib plates, one ends of at least part of the rib plates are connected to the first box wall, and the other ends are connected to the limiting piece. According to the technical scheme, the working reliability of the battery device can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device using the battery device. Background Technology

[0002] When battery devices are used in vehicles and other electrical equipment, these devices may collide with other electrical equipment or obstacles during driving. The resulting impact will be transmitted to the battery device, causing damage. Utility Model Content

[0003] The main objective of this application is to provide a battery device and an electrical appliance designed to improve the reliability of the battery device's operation.

[0004] To achieve the above objectives, the battery device proposed in this application includes:

[0005] Battery box, with a housing cavity inside;

[0006] A limiting member is provided inside the receiving cavity and divides the receiving cavity into a first cavity and a second cavity;

[0007] The battery cell assembly includes multiple battery cells, which are disposed within a first cavity; and

[0008] An energy-absorbing structure is located within the second cavity.

[0009] The battery box has a first box wall, which is spaced apart from the limiting member and configured to enclose the limiting member to form a second cavity; the energy-absorbing structure includes a plurality of stiffeners, at least some of which are connected at one end to the first box wall and at the other end to the limiting member.

[0010] The battery device of this application divides the accommodating cavity within the battery box into a first cavity and a second cavity using a limiting member. Multiple battery cells from the battery cell assembly are housed in the first cavity, while an energy-absorbing structure is located in the second cavity. When the battery device is subjected to an impact in the direction of the arrangement of the first and second cavities, the impact force is first transmitted through the battery box to the energy-absorbing structure in the second cavity. The energy-absorbing structure can then collapse and deform under the impact, absorbing and dissipating the transmitted impact force. This reduces the possibility of the impact force being further transmitted to the battery cells in the first cavity, causing damage, thus allowing the battery cells to operate normally and stably, thereby improving the reliability of the battery device. Furthermore, the energy-absorbing structure is concealed within the battery box, preventing additional space occupation and installation issues when the battery device is used in electrical equipment, thus improving the convenience of installation and placement of the battery device in electrical equipment. Furthermore, the energy-absorbing structure and the battery cell assembly are housed separately in the second and first cavities, respectively, allowing for separate chamber arrangements that minimize interference and improve ease of placement. Additionally, the energy-absorbing structure includes multiple stiffeners, with at least some stiffeners having their ends connected to the first housing wall and a limiting member, facilitating bending deformation of the stiffeners along their length to enhance impact absorption. This multiple stiffener configuration also contributes to the energy-absorbing structure's lightweight design, minimizing its weight increase in the battery pack. Moreover, it reduces the amount of raw materials required for manufacturing the energy-absorbing structure, thereby lowering manufacturing costs.

[0011] In some embodiments, at least some stiffening plates intersect to form holes, and multiple holes are arranged side by side at intervals.

[0012] This allows the stiffeners to be connected, so that they can disperse the impact force when subjected to collisions, thereby improving the absorption and dissipation of the impact force.

[0013] In some embodiments, the battery box further has a second box wall adjacent to the first box wall, the limiting member and the battery cell assembly are both disposed on the second box wall, and the second box wall is further configured to enclose the second cavity with the limiting member to form a first cavity;

[0014] The holes are set along a first direction, which intersects with the second box wall.

[0015] This allows for the convenient arrangement of multiple stiffening plates along the extension direction of the second cavity, thereby expanding the coverage of the energy-absorbing structure and improving the protection of the battery cells.

[0016] In some embodiments, the battery box has a first side and a second side opposite to each other in the second direction, and the first direction, the second direction, and the arrangement direction of the limiting member and the first box wall intersect each other.

[0017] The plurality of stiffeners includes a first stiffener and a second stiffener. In the direction of the first box wall toward the limiting member, the first stiffener is gradually moved closer to one of the first side and the second side, and the second stiffener is gradually moved closer to one of the first side and the second side, and intersects with the first stiffener to form at least a partial hole.

[0018] Therefore, the impact force can be dispersed along the extension direction of the first and second stiffeners towards both sides of the battery box in the second direction, reducing the impact kinetic energy of the impact force in the third direction and improving the absorption and dissipation effect of the energy-absorbing structure on the impact force.

[0019] In some embodiments, the plurality of stiffeners further includes a third stiffener extending along a second direction and configured to intersect and enclose at least a portion of the first and second stiffeners to form at least a portion of the opening.

[0020] Therefore, the third stiffener can further block the impact force of a third-party collision, thereby further improving the energy absorption structure's ability to absorb and dissipate the impact force.

[0021] In some embodiments, the second cavity extends along a second direction, which intersects the arrangement direction of the limiting member and the first box wall;

[0022] The second cavity has a middle region and an edge region in the second direction. In the arrangement direction of the limiting member and the first box wall, the length of the middle region is greater than the length of the edge region.

[0023] Some stiffeners are located in the middle area, and some are located in the edge area.

[0024] Therefore, when the battery device is subjected to a relatively large impact, the energy-absorbing structure in the middle region, which has a high capacity to absorb and dissipate the impact force, can effectively absorb and dissipate the large impact force, thereby improving the protection effect on the individual battery cells.

[0025] In some embodiments, among the plurality of stiffening plates located in the intermediate region, at least some of the stiffening plates are configured to cross and enclose holes, and the plurality of holes are arranged side by side at intervals.

[0026] And / or, multiple stiffening plates located in the edge area are all arranged along the arrangement direction of the limiting member and the first box wall, and are arranged side by side at intervals in the second direction.

[0027] This is beneficial for improving the energy-absorbing structure's ability to absorb and dissipate collision impact in the central area, as well as for improving the ease of arranging energy-absorbing structures in the edge area.

[0028] In some embodiments, the battery box also has a second box wall adjacent to the first box wall, and the limiting member and the battery cell assembly are both disposed on the second box wall;

[0029] The second box wall is also configured to enclose the first cavity and the second cavity with the limiting member, and the stiffening plate is also connected to the second box wall.

[0030] Therefore, the energy-absorbing structure can stably absorb and dissipate the impact force between the limiting component and the first box wall, thus improving the reliability of the energy-absorbing structure.

[0031] In some embodiments, the stiffening plate, the limiting member, the first box wall, and the second box wall are integrally formed.

[0032] This helps to further enhance the connection strength between the energy-absorbing structure and the limiting component, the first box wall, and the second box wall, so as to improve the overall strength of this part of the structure.

[0033] In some embodiments, at least some of the holes are triangular or quadrilateral in shape.

[0034] Therefore, the energy-absorbing structure can effectively absorb and dissipate the impact force of collisions, and its shape is simple and easy to manufacture.

[0035] In some embodiments, the first cavity and the second cavity are arranged along a third direction, the second cavity extends along a second direction, the second direction intersects with the third direction, and the energy-absorbing structure is disposed on at least one side of the second cavity in the second direction.

[0036] Therefore, when the battery device is applied to a vehicle, it can provide adaptive anti-collision protection for the area at the front of the vehicle corresponding to the driver's seat, where collisions with obstacles are likely to occur during turning.

[0037] In some embodiments, the battery box is provided with a heat exchange channel, and the battery device further includes a pipe joint mechanism disposed in the second cavity and communicating with the heat exchange channel.

[0038] Therefore, the pipeline joint mechanism and the energy-absorbing structure can share the second cavity, improving the space utilization of the second cavity.

[0039] In some embodiments, the first cavity and the second cavity are arranged along a third direction, the second cavity extends along a second direction, the second direction intersects with the third direction, and the energy-absorbing structure and the pipeline joint mechanism are arranged along the second direction.

[0040] Therefore, the extension space of the second cavity in the second direction can be adapted to improve the convenience and compactness of the arrangement of the pipeline joint mechanism and the energy absorption mechanism.

[0041] In some embodiments, the pipeline connector mechanism includes a connector body, which includes an inlet connector and an outlet connector;

[0042] The liquid inlet and liquid outlet are respectively connected to the heat exchange channel and are arranged side by side in the second direction;

[0043] The joint body has an energy-absorbing structure on at least one side in the second direction.

[0044] This improves the convenience and compactness of the pipeline joint mechanism layout, making it easier for the external circulation pipeline mechanism to be centrally connected with the inlet and outlet joints at the location of the joint body; by setting the energy-absorbing structure on at least one side of the joint body in the second direction, the energy-absorbing structure will not interfere with the connection between the inlet and outlet joints and the external circulation pipeline mechanism.

[0045] In some embodiments, the pipe fitting mechanism further includes two connecting pipes, which are respectively disposed on both sides of the fitting body in the second direction, and both extend at least partially along the second direction.

[0046] One end of each of the two connecting pipes is connected to the liquid inlet and liquid outlet respectively, and the other end is connected to the heat exchange channel;

[0047] The energy-absorbing structure and the connecting pipe located on the same side of the joint body are arranged at intervals or overlaps in the second direction.

[0048] Therefore, by using connecting pipes, the positional requirements of the inlet and outlet of the heat exchange channel for the liquid inlet and outlet joints can be reduced, which is beneficial to improving the convenience of connecting the pipe joint mechanism with the heat exchange channel. Furthermore, by distributing two connecting pipes on both sides of the joint body and extending at least partially along the second direction, while the energy-absorbing structure is also located on at least one side of the joint body in the second direction, both the components inside the pipe joint mechanism and the pipe joint mechanism and the energy-absorbing structure are arranged along the second direction, so as to make adaptive use of the extension space of the second cavity in the second direction. When the energy-absorbing structure and connecting pipes are overlapped in the second direction, the compactness of their distribution can be improved. When they are spaced apart in the second direction, the energy-absorbing structure and connecting pipes can be arranged in separate zones, making them less likely to interfere with each other and improving the convenience of their installation and layout.

[0049] In some embodiments, the energy-absorbing structure located on the same side of the connector body overlaps with the connecting pipe;

[0050] The energy-absorbing structure is provided with a clearance groove, which at least penetrates the energy-absorbing structure on the side facing the connector body in the second direction, and at least a portion of the connecting pipe is accommodated in the clearance groove.

[0051] Therefore, at least a portion of the connecting pipe located on the same side of the joint body as the energy-absorbing structure can be accommodated by the clearance groove, so as to improve the compactness of the distribution between the pipe joint mechanism and the energy-absorbing structure.

[0052] In some embodiments, the energy-absorbing structure is provided with a clearance groove, and at least a portion of the pipe fitting mechanism is accommodated within the clearance groove.

[0053] Therefore, at least part of the energy-absorbing structure can be accommodated by the clearance groove, so as to improve the compactness of the distribution between the pipeline joint mechanism and the energy-absorbing structure.

[0054] In some embodiments, the battery box has a second box wall and a third box wall spaced apart from each other, the limiting member and the battery cell assembly are both disposed on the second box wall, the second box wall is further configured to enclose the limiting member to form a first cavity and a second cavity, and the clearance groove penetrates at least through the energy-absorbing structure on the side facing the third box wall.

[0055] The battery device also includes a reinforcement member disposed on the side of the energy-absorbing structure facing the third box wall and covering at least a portion of the clearance groove. The reinforcement member connects at least the portions of the energy-absorbing structure located on opposite sides of the clearance groove.

[0056] Therefore, the strength of the energy-absorbing structure can be enhanced by reinforcing components, so that the energy-absorbing structure can still meet the strength requirements after the clearance groove is opened.

[0057] In some embodiments, the pipe joint mechanism is located at the middle position of the second cavity in the second direction, and the energy-absorbing structure is located on at least one side of the second cavity in the second direction.

[0058] This allows the heat exchange channels and pipe joint mechanism to be centrally located, facilitating a uniform arrangement of the heat exchange channels across the battery pack and improving temperature uniformity for individual battery cells. Furthermore, the energy-absorbing structure is positioned on at least one side of the second direction within the second cavity, enabling the orderly arrangement of the pipe joint mechanism and energy-absorbing structure within the mounting cavity.

[0059] In some embodiments, the pipe joint and the energy-absorbing structure are located on opposite sides of the second cavity in the second direction.

[0060] Therefore, energy-absorbing structures are present on both sides of the second cavity in the second direction, which can improve the coverage of the energy-absorbing structures and thus improve the absorption and dissipation effect of the impact force.

[0061] In some embodiments, the pipeline connector mechanism includes a connector body, which includes an inlet connector and an outlet connector;

[0062] The inlet and outlet connectors are respectively connected to the heat exchange channel and are located on opposite sides of the second cavity in the second direction;

[0063] The energy-absorbing structure is located between the liquid inlet and the liquid outlet.

[0064] This allows for a larger space between the inlet and outlet connectors, enabling the placement of a larger energy-absorbing structure, increasing the coverage of the energy-absorbing structure, and thus improving the absorption and dissipation effect of the impact force.

[0065] In some embodiments, the battery device further includes a temperature sampling mechanism, which includes a temperature sensor and a sampling harness. The temperature sensor is disposed in the pipe joint mechanism and configured to detect the temperature of the heat exchange medium within the pipe joint mechanism. The sampling harness is electrically connected to the temperature sensor.

[0066] The energy-absorbing structure is equipped with a wire passage groove, and part of the sampling wire bundle is passed through the wire passage groove.

[0067] Therefore, by setting up a temperature sampling mechanism, the temperature of the heat exchange medium can be sampled when it enters and / or flows out of the heat exchange channel, so as to monitor the heat dissipation and cooling effect on the battery device. Furthermore, by setting a wire groove on the energy-absorbing structure, the energy-absorbing structure can also limit the sampling wire bundle, improving the stability of the sampling wire bundle arrangement.

[0068] In some embodiments, the battery box has a second box wall, and both the limiting member and the battery cell assembly are disposed on the second box wall. The second box wall is also configured to enclose the limiting member to form a first cavity and a second cavity, and the second box wall is provided with a heat exchange channel.

[0069] This allows for convenient heat exchange between the heat exchange channel and each battery cell mounted on the second tank wall, improving heat dissipation and temperature uniformity for the battery cells.

[0070] In some embodiments, the second box wall includes a main plate and an auxiliary plate, the battery cell assembly is disposed on the main plate, and the main plate is provided with a heat exchange channel;

[0071] An auxiliary plate is stacked on the side of the main plate facing the battery cell assembly. The area of ​​the main plate that is misaligned with the auxiliary plate is configured to form a first cavity with the limiting member, and the auxiliary plate is configured to form a second cavity with the limiting member.

[0072] The pipe joint mechanism and at least part of the energy-absorbing structure are located on the side of the auxiliary plate opposite to the main plate. Part of the pipe joint mechanism passes through the auxiliary plate and is connected to the heat exchange channel.

[0073] This allows the main body panel and auxiliary panels to be manufactured separately, thereby reducing manufacturing complexity.

[0074] In some embodiments, the battery device further includes a battery management system disposed within a second cavity and electrically connected to the individual battery cells.

[0075] This allows the battery management system and the energy absorption structure to share the second cavity, improving the space utilization of the second cavity.

[0076] In some embodiments, the limiting member has a cavity.

[0077] This allows the limiting component to also undergo collapsing deformation, thereby absorbing and dissipating the impact force transmitted by the energy-absorbing structure. This achieves multi-level absorption and dissipation of impact forces, improving the absorption and dissipation effect of impact forces and thus enhancing the protection of the battery cells.

[0078] In some embodiments, a battery cell has a first end face and a second end face opposite to each other, and a side peripheral surface connecting the first end face and the second end face, wherein the first end face is provided with an electrode post;

[0079] The side surface includes two opposing large surfaces and two opposing small surfaces. The first cavity and the second cavity are arranged along a third direction, and the two large surfaces are arranged along a second direction that intersects the first direction.

[0080] Therefore, this limiting component structure can not only limit and prevent the expansion of the battery cells, but also stop the energy absorption structure, so as to achieve multiple functions with the same structure, which is conducive to simplifying the structural design of the battery device.

[0081] On the other hand, the electrical equipment proposed in this application includes the battery device in any of the above embodiments. Attached Figure Description

[0082] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 the structures shown in these drawings without creative effort.

[0083] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application;

[0084] Figure 2 This is a schematic diagram of the structure of an embodiment of the battery device of this application;

[0085] Figure 3 This is an exploded structural diagram of a single battery cell in an embodiment of the battery device of this application;

[0086] Figure 4This is a partial structural schematic diagram of the battery device of this application;

[0087] Figure 5 This is another partial structural schematic diagram of the battery device of this application;

[0088] Figure 6 for Figure 5 A schematic diagram of the battery assembly without the reinforcing components;

[0089] Figure 7 for Figure 6 A schematic diagram of the exploded structure of the battery device;

[0090] Figure 8 for Figure 7 A schematic diagram of the auxiliary plate, limiting components, and energy-absorbing structure of the battery device;

[0091] Figure 9 for Figure 8 Another structural diagram of the auxiliary plate, limiting components, and energy-absorbing structure.

[0092] Explanation of icon numbers:

[0093] 100. Battery assembly; 1. Battery box; 11. Box cover; 12. Box body; 1a. Receiving cavity; 1a1. First cavity; 1a3. Second cavity; 1a31. Middle area; 1a33. Edge area; 121. First box wall; 122. Second box wall; 1221. Main plate; 1222. Auxiliary plate; 1223. Through hole; 125. Third box wall; 20A. Battery cell assembly; 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 231. Tab; 24. First end face; 25. Second end face; 26. Side 261. Peripheral surface; 262. Small surface; 30. Energy-absorbing structure; 31. Clearance groove; 32. Cable passage groove; 33. Rib plate; 335. Hole; 33A. First rib plate; 33B. Second rib plate; 33C. Third rib plate; 33D. Fourth rib plate; 40. Pipe joint mechanism; 41. Joint body; 411. Liquid inlet joint; 413. Liquid outlet joint; 415. Mounting base; 43. Connecting pipe; 50. Temperature sampling mechanism; 51. Sampling harness; 60. Limiting component; 70. Reinforcing component; 71. Cable fixing structure; 1000. Vehicle; 200. Controller; 300. Motor.

[0094] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0095] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0096] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0097] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0098] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0099] Battery devices, which are devices used to store electrical energy, are widely used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields.

[0100] The battery device may include a battery case and individual battery cells disposed within the battery case. The battery case may include a casing and a cover that closes to the casing to enclose a cavity for housing the individual battery cells. The individual battery cell is the smallest unit comprising the battery and typically includes a battery casing and an electrode assembly disposed within the battery casing. The electrode assembly is the component in the individual battery cell where the actual electrochemical reaction occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells located within the battery case may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0101] Furthermore, when battery devices are used in vehicles and other electrical equipment, collisions with other electrical equipment or obstacles are inevitable during driving. In such cases, the impact from the collision can be directly transmitted through the battery pack to the individual battery cells, causing deformation or damage and preventing them from functioning normally and stably.

[0102] Therefore, based on the above considerations, in order to solve the problem that battery devices in related technologies are easily damaged by impacts, this application proposes a novel battery device. This battery device innovatively incorporates an energy-absorbing structure inside the battery box, next to the individual battery cells. This structure absorbs and dissipates the impact force transmitted from the battery box, reducing the possibility of the impact force being further transmitted to the individual battery cells and causing damage. This allows the individual battery cells to operate normally and stably, thereby improving the reliability of the battery device.

[0103] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0104] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0105] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0106] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0107] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 1 and a battery cell assembly 20A; the battery case 1 is provided with a receiving cavity 1a, and the battery cell assembly 20A includes a plurality of battery cells 20, which are disposed inside the battery case 1.

[0108] The battery cell assembly 20A may comprise three or more battery cells 20. These battery cells 20 may be connected in series, parallel, or a combination thereof. A combination thereof means that the battery cells 20 are connected in both series and parallel configurations. When the battery device 100 is in its normal installation and use state, the first direction can be defined as the vertical direction, and the second and third directions can be two intersecting horizontal directions. In this case, the battery cells 20 in the battery cell assembly 20A may be arranged in a row along the second direction, or further arranged in multiple rows along the third direction. Alternatively, the battery cells 20 in the battery cell assembly 20A may also be arranged in a row along the third direction, or further arranged in multiple rows along the second direction. This application does not limit the arrangement direction of the battery cells 20 in the battery cell assembly 20A. Furthermore, the first direction can also be the height direction of the battery device 100, the second direction can be one of the length and width directions of the battery device 100, and the third direction can be the other of the length and width directions of the battery device 100. When the battery device 100 is installed on the vehicle 1000, the second direction can be one of the front-rear direction and the left-right direction of the vehicle 1000, or the other of the front-rear direction and the left-right direction of the vehicle 1000.

[0109] The battery case 1 can be used to form a receiving cavity 1a to provide a space for accommodating the battery cell 20. The battery case 1 can adopt various structures. In some embodiments, the battery case 1 can include a cover 11 and a body 12 that overlap each other to jointly define the receiving cavity 1a for accommodating the battery cell 20. In this case, the body 12 can provide accommodating support for the battery cell 20. Alternatively, both the cover 11 and the body 12 can be hollow structures with an opening on one side. In this case, the opening side of the cover 11 can cover the opening side of the body 12. Of course, the cover 11 can also be a plate structure and cover the opening side of the body 12. In addition, the battery case 1 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0110] In addition, the battery device 100 may include other structures, such as a busbar, for electrical connection between multiple battery cells 20. Furthermore, each battery cell 20 may be a secondary or primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, cuboid, or other shapes.

[0111] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3 As shown, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0112] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, giving battery cell 20 higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0113] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0114] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the electrode terminals 21a to form a current loop.

[0115] Please refer to the reference. Figure 2 ,as well as Figures 4 to 6 In one embodiment of this application, the battery device 100 further includes a limiting member 60 and an energy-absorbing structure 30; the limiting member 60 is disposed in the accommodating cavity 1a and divides the accommodating cavity 1a to form a first cavity 1a1 and a second cavity 1a3; a plurality of battery cells 20 are disposed in the first cavity 1a1; and the energy-absorbing structure 30 is disposed in the second cavity 1a3.

[0116] The limiting member 60 can be used to divide the accommodating cavity 1a to form a first cavity 1a1 and a second cavity 1a3, which in turn accommodate the battery cell assembly 20A and the energy-absorbing structure 30, respectively. When the battery box 1 includes a box cover 11 and a box body 12 as described above, since the battery cell assembly 20A is usually installed inside the box body 12, the limiting member 60 can be disposed inside the box body 12 to divide the accommodating cavity 1a within the box body 12 into the first cavity 1a1 and the second cavity 1a3. Furthermore, the limiting member 60 and the box body 12 can be in contact, or there can be a gap between them. Furthermore, the limiting member 60 can be disposed on one side of the outer periphery of the battery cell assembly 20A, or on opposite sides of the outer periphery of the battery cell assembly 20A, or on adjacent sides of the outer periphery of the battery cell assembly 20A, or on three sides or around the outer periphery of the battery cell assembly 20A, so that the second cavity 1a3 can be correspondingly distributed on one side, opposite sides, adjacent sides, three sides, or around the outer periphery of the first cavity 1a1. For example, when the first direction is vertical as described above, the limiting member 60 can be disposed on at least one side of the two sides in the second direction of the battery cell assembly 20A, so that the second cavity 1a3 is correspondingly disposed on at least one side of the two sides in the second direction of the first cavity 1a1. Of course, the limiting member 60 can also be disposed on at least one side of the two sides in the third direction of the battery cell assembly 20A, so that the second cavity 1a3 is correspondingly disposed on at least one side of the two sides in the third direction of the first cavity 1a1. It can be seen that this application does not limit the placement of the limiting member 60 on the outer periphery of the battery cell assembly 20A.

[0117] In some embodiments, the limiting member 60 can also be used to limit the battery cell 20. For example, when the limiting member 60 is disposed on at least one side of the battery cell assembly 20A in the third direction, the limiting member 60 can limit the battery cell 20 in the third direction. Wherein, when the two large surfaces 261 of the battery cell 20 in the battery cell assembly 20A are arranged along the third direction, the limiting member 60 can be formed as an expansion beam to further resist expansion of the battery cell 20. Of course, when the two large surfaces 261 of the battery cell 20 in the battery cell assembly 20A are arranged along the second direction, the limiting member 60 can be formed as a limiting beam to limit the battery cell 20 in the third direction. To improve the limiting effect of the limiting member 60 on the battery cell 20, the limiting member 60 can be configured to contact the battery cell assembly 20A.

[0118] Please refer to the reference. Figures 2 to 4In one embodiment of this application, the limiting member 60 is disposed on the third-direction upward side of the battery cell assembly 20A and extends along the second direction. Thus, the limiting member 60 can be elongated, thereby facilitating the limiting effect on the battery cell assembly 20A at various points along its length. Furthermore, the second cavity 1a3 can extend along the third direction following the limiting member 60.

[0119] Of course, in other embodiments, the limiting member 60 can also be an object independent of the limiting beam and the expansion beam, used only to partially enclose the second cavity 1a3 with the housing 12 of the battery box 1. In this case, the limiting member 60 and the battery cell assembly 20A can be arranged at intervals.

[0120] Furthermore, the limiting member 60 can be arranged in a linear extension or in an arc, and can form a long beam structure or a plate structure. This application does not limit the structural type and shape of the limiting member 60.

[0121] In addition, the second cavity 1a3 may be used only for setting the energy absorption structure 30, or it may be used to set other structures of the battery device 100 on the basis of setting the energy absorption structure 30, such as the pipeline connector mechanism 40 or the battery management system as described below.

[0122] The energy-absorbing structure 30 can be used to absorb the impact transmitted from the battery box 1 and undergoes collapse deformation under the impact force to absorb and dissipate the impact force. The energy-absorbing structure 30 can be a structure including multiple stiffeners 33 as described below, or it can be a structure of an energy-absorbing box, a spring, a damper, or a shock absorber, etc. This application does not limit the type of the energy-absorbing structure 30. Furthermore, the energy-absorbing structure 30 can be connected to the battery box 1, to the limiting member 60, or simultaneously to both the battery box 1 and the limiting member 60. Regarding the connection method of the energy-absorbing structure 30, it can be integrally formed with the battery box 1 and / or the limiting member 60, or it can be connected by welding, bonding, or screws, etc. This application does not limit the connection object or connection method of the energy-absorbing structure 30.

[0123] The battery device 100 of this application uses a limiting member 60 to divide the accommodating cavity 1a within the battery box 1 into a first cavity 1a1 and a second cavity 1a3. Multiple battery cells 20 from the battery cell assembly 20A are disposed within the first cavity 1a1, while an energy-absorbing structure 30 is disposed within the second cavity 1a3. When the battery device 100 is subjected to a collision impact in the arrangement direction of the first cavity 1a1 and the second cavity 1a3, the impact force is first transmitted through the battery box 1 to the energy-absorbing structure 30 located in the second cavity 1a3. The energy-absorbing structure 30 can undergo collapse deformation under the impact, absorbing and dissipating the transmitted impact force. This reduces the possibility of the impact force being further transmitted to the battery cells 20 located in the first cavity 1a1, causing impact damage, thus allowing the battery cells 20 to operate normally and stably, thereby improving the reliability of the battery device 100. Furthermore, the energy-absorbing structure 30 is concealed within the battery box 1, thus avoiding any additional space occupation or impact on the installation of the battery device 100 when it is applied to electrical equipment. This improves the ease of installation and arrangement of the battery device 100 on the electrical equipment. Moreover, the energy-absorbing structure 30 and the battery cell assembly 20A are respectively housed within the second cavity 1a3 and the first cavity 1a1, allowing for separate cavity arrangements that minimize interference and further enhance the ease of their respective placement.

[0124] Furthermore, since there is a limiting member 60 between the energy-absorbing structure 30 and the battery cell assembly 20A, when the energy-absorbing structure 30 is subjected to the impact of a collision on the side facing away from the battery cell assembly 20A, the limiting member 60 can stop and limit the energy-absorbing structure 30 on the opposite side, so that it is easier to undergo collapse deformation under the combined action of the collision impact force and the stopping action of the limiting member 60, thereby improving the absorption and consumption effect of the collision impact force.

[0125] In one embodiment of this application, the limiting member 60 is provided with a cavity.

[0126] A cavity is a hollow structure formed by removing part of the material. The cavity within the limiting member 60 can extend along the extending direction of the limiting member 60. Of course, there can be multiple cavities, spaced apart along the extending direction of the limiting member 60. In this case, each cavity can extend along the extending direction of the limiting member 60. Alternatively, each cavity can extend along a direction intersecting the extending direction of the limiting member 60. For example, when the limiting member 60 is located on at least one side of the battery cell assembly 20A in a third-direction orientation and extends along a second direction, each cavity can extend along either the first or third-direction orientation. Furthermore, the cavity can be completely hidden within the limiting member 60, or it can penetrate the surface of the limiting member 60.

[0127] In this embodiment, a cavity is provided within the limiting member 60, allowing the limiting member 60 to also undergo collapsible deformation to absorb and dissipate the impact force transmitted from the energy-absorbing structure 30. In this case, the energy-absorbing structure 30 can be considered a primary structure for absorbing and dissipating impact forces, and the limiting member 60 can be considered a secondary structure for absorbing and dissipating impact forces, thereby achieving multi-level absorption and dissipation of impact forces, thus improving the absorption and dissipation effect of impact forces and enhancing the protection effect on the battery cell 20.

[0128] Please refer to the reference. Figures 2 to 5 In one embodiment of this application, the battery cell 20 has a first end face 24 and a second end face 25 facing each other, and a side peripheral surface 26 connecting the first end face 24 and the second end face 25. The first end face 24 is provided with a terminal post. The side peripheral surface 26 includes two opposing large surfaces 261 and two opposing small surfaces 262. The first cavity 1a1 and the second cavity 1a3 are arranged along a third direction, and the two large surfaces 261 are arranged along a third direction.

[0129] When the first direction is vertical as described above, the first end face 24 of the battery cell 20 can be the top surface of the battery cell 20, and the second end face 25 can be the bottom surface of the battery cell 20, and can be used for mounting in the housing 12 of the battery box 1. The large surface 261 and small surface 262 in the side peripheral surface 26 refer to the side with a relatively larger area being the large surface 261 and the side with a relatively smaller area being the small surface 262. Since the expansion force of the battery cell 20 is mainly along the direction perpendicular to the large surface 261, it can be said that the arrangement direction of the two large surfaces 261 in the battery cell 20 is the direction of the expansion force of the battery cell 20. The first cavity 1a1 and the second cavity 1a3 are arranged along a third direction, which can also be said to mean that the limiting member 60 and the battery cell assembly 20A are arranged along a third direction. This includes the case where the limiting member 60 is located on one side of the battery cell assembly 20A in the third direction, and also includes the case where the limiting member 60 is located on opposite sides of the battery cell assembly 20A in the third direction.

[0130] In this embodiment, the limiting member 60 is disposed on one side in the direction of the expansion force of the battery cell 20, so that the limiting member 60 can be formed as an expansion beam. At this time, the limiting member 60 can not only limit and resist the expansion of the battery cell 20, but also stop the energy absorption structure 30, realizing multiple functions of the same structure, thereby simplifying the structural configuration of the battery device 100.

[0131] Of course, in other embodiments, the two large surfaces 261 of the battery cell 20 in the battery cell assembly 20A can also be arranged along the second direction. In this case, the limiting member 60 can be formed as a limiting beam as described above, and a cavity can be provided inside the limiting member 60. Alternatively, the limiting member 60 can be set as a solid structure.

[0132] Furthermore, to improve the limiting effect or anti-expansion effect on the battery cell 20, the number of limiting members 60 can be two, and they can be respectively arranged on both sides of the battery cell assembly 20A in the second direction. At this time, the energy absorption structure 30 can be provided on only one side of the limiting member 60 facing away from the battery cell assembly 20A, or the energy absorption structure 30 can be provided on both sides of the limiting members 60 facing away from the battery cell assembly 20A.

[0133] Please refer to the reference. Figures 6 to 8 In one embodiment of this application, the battery box 1 has a first box wall 121, which is arranged at a relative distance from the limiting member 60 and configured to enclose the limiting member 60 to form a second cavity 1a3; the energy absorption structure 30 includes a plurality of stiffeners 33, at least one end of a portion of the stiffeners 33 is connected to the first box wall 121 and the other end is connected to the limiting member 60.

[0134] When the battery assembly 100 is in normal installation and use, the first box wall 121 can be a side wall of the battery box 1 and is located on the side of the limiting member 60 facing away from the battery cell assembly 20A. Therefore, it can be said that the arrangement direction of the first box wall 121 and the limiting member 60 is the same as the arrangement direction of the first cavity 1a1 and the second cavity 1a3. In addition, when the box cover 11 is a plate structure as described above, the first box wall 121 can be entirely set on the box body 12. When the box cover 11 is a hollow structure with an opening on one side as described above, the first box wall 121 can be partially set on the box body 12 and partially set on the box cover 11. In this case, the first box wall 121 set on the box body 12 is used to enclose the second cavity 1a3 with the limiting member 60, and the stiffening plate 33 is also connected to the first box wall 121 set on the box body 12. Furthermore, the fact that one end of the stiffening rib 33 is connected to the first box wall 121 and the other end is connected to the limiting member 60 means that the stiffening rib 33 extends along the entire length direction of the limiting member 60 and the first box wall 121. This includes situations where the length direction of the stiffening rib 33 is parallel to the arrangement direction of the limiting member 60 and the first box wall 121, or where the length direction of the stiffening rib 33 intersects with but is not perpendicular to the arrangement direction of the limiting member 60 and the first box wall 121. Additionally, the stiffening rib 33 can be arranged horizontally or vertically. Furthermore, at least some of the stiffening ribs 33 can be arranged in a crisscross pattern as described below, or they can be arranged side-by-side at intervals.

[0135] In this embodiment, the energy-absorbing structure 30 is configured to include multiple stiffeners 33, with at least some of the stiffeners 33 extending along the arrangement direction of the limiting member 60 and the first housing wall 121 in their length direction. The stiffeners 33 can be fixed at both ends in the length direction by the first housing wall 121 and the limiting member 60, allowing the stiffeners 33 to bend and deform at their middle length when subjected to a collision impact in the arrangement direction of the limiting member 60 and the first housing wall 121, thereby improving the absorption and dissipation effect of the impact force. Furthermore, the relatively small size of the stiffeners 33 contributes to the lightweight effect of the energy-absorbing structure 30, preventing a significant increase in the weight of the battery device 100. Simultaneously, the raw materials used in manufacturing the energy-absorbing structure 30 can be reduced, thus lowering manufacturing costs.

[0136] Please refer to the reference. Figure 8 and Figure 9 In one embodiment of this application, at least some of the stiffening plates 33 intersect to form holes 335, and multiple holes 335 are arranged side by side at intervals.

[0137] When the stiffening plate 33 is arranged vertically as described above, the hole 335 may be provided extending along the first direction as described below. When the stiffening plate 33 is arranged horizontally as described above, and the limiting member 60 is provided on at least one side of the battery cell assembly 20A in a third direction, the hole 335 may be provided extending along the second direction.

[0138] In this embodiment, at least some of the stiffening plates 33 are arranged in a cross-shaped enclosure to form holes 335, allowing the stiffening plates 33 to be connected. This enables them to disperse the impact force during a collision, further enhancing their ability to absorb and dissipate the impact force. Since at least some of the stiffening plates 33 are arranged in a cross-shaped configuration, the opposite ends of each stiffening plate 33 can be connected to the limiting member 60 and the first box wall 121, respectively. Alternatively, one end of a stiffening plate 33 can be connected to either the limiting member 60 or the first box wall 121, while the other end is connected to another cross-shaped stiffening plate 33.

[0139] Please refer to the reference. Figure 4 ,as well as Figure 8 and Figure 9 In one embodiment of this application, the battery box 1 further has a second box wall 122 adjacent to the first box wall 121. The limiting member 60 and the battery cell assembly 20A are both disposed on the second box wall 122. The second box wall 122 is also configured to enclose the limiting member 60 to form a first cavity 1a1 and a second cavity 1a3. The hole 335 extends along a first direction and intersects the second box wall 122 in the first direction.

[0140] When the first box wall 121, as described above, serves as a side wall of the battery box 1, the second box wall 122 can be formed from the wall surface of the box body 12 corresponding to its opening side, serving as the bottom wall of the battery box 1, thereby providing mounting support for the multiple battery cells 20 in the battery cell assembly 20A. For example, the battery cells 20 can be bonded to the second box wall 122 using adhesive. Furthermore, the second box wall 122 is also configured to enclose a first cavity 1a1 and a second cavity 1a3 with the limiting member 60, meaning that the second box wall 122 can be partially used to enclose the first cavity 1a1 with the limiting member 60 and partially used to enclose the second cavity 1a3 with the limiting member 60. Moreover, regarding the second cavity 1a3, when the two ends of the first box wall 121 are bent and connected to the limiting member 60 in the second direction, it can be formed solely by the limiting member 60, the first box wall 121, and the second box wall 122. Of course, when the first box wall 121 is spaced apart from the limiting member 60 at both ends in the second direction, it can be formed by the limiting member 60, the first box wall 121, the second box wall 122, and other box walls in the battery box 1 that are adjacent to the first box wall 121 and the second box wall 122.

[0141] In this embodiment, the hole 335 is extended along the first direction, so that the stiffener 33 is arranged vertically as described above. This allows multiple stiffeners 33 to be conveniently laid out along the extension direction of the second cavity 1a3, thereby expanding the coverage of the energy-absorbing structure 30 and improving the protection of the battery cell 20.

[0142] Please refer to the reference. Figures 7 to 9 In one embodiment of this application, the battery box 1 has a first side 1b and a second side 1c opposite each other in the second direction. The first direction, the second direction, and the arrangement direction of the limiting member 60 and the first box wall 121 intersect each other. The plurality of stiffeners 33 include a first stiffener 33A and a second stiffener 33B. In the direction of the first box wall 121 toward the limiting member 60, the first stiffener 33A is gradually moved closer to one of the first side 1b and the second side 1c, and the second stiffener 33B is gradually moved closer to one of the first side 1b and the second side 1c, and intersects with the first stiffener 33A to form at least a partial hole 335.

[0143] In the direction of the first box wall 121 toward the limiting member 60, the first stiffening plate 33A is gradually positioned closer to one of the first side 1b and the second side 1c, and the second stiffening plate 33B is gradually positioned closer to one of the first side 1b and the second side 1c. Specifically, along the direction of the first box wall 121 toward the limiting member 60, the first stiffening plate 33A is inclined to one side in the second direction, and the second stiffening plate 33B is inclined to the opposite side in the second direction.

[0144] In this embodiment, along the direction of the first housing wall 121 toward the limiting member 60, the first stiffener 33A and the second stiffener 33B are respectively inclined to both sides in the second direction of the battery box 1. This allows the impact force to be dispersed along the extension direction of the first stiffener 33A and the second stiffener 33B toward both sides in the second direction of the battery box 1 when subjected to a collision impact in the third direction, i.e., the arrangement direction of the limiting member 60 and the first housing wall 121. This reduces the impact kinetic energy of the impact force in the third direction and improves the absorption and dissipation effect of the energy-absorbing structure 30 on the impact force, thereby enhancing the protection of the battery cell 20. Simultaneously, this arrangement also facilitates the formation of holes 335 by at least some of the stiffeners 33 intersecting and enclosing each other, as described above. All holes 335 can be formed by the enclosing of the first stiffener 33A and the second stiffener 33B. Of course, some holes 335 may be enclosed by the first stiffener 33A and the second stiffener 33B, and some holes 335 may be enclosed by other stiffeners 33, or they may be enclosed by other stiffeners 33 and at least one of the first stiffener 33A and the second stiffener 33B.

[0145] Please refer to the reference. Figure 8 and Figure 9 In one embodiment of this application, the plurality of stiffeners 33 further includes a third stiffener 33C, which extends along a second direction and is configured to intersect and enclose at least a portion of the first stiffeners 33A and the second stiffeners 33B to form at least a portion of the holes 335.

[0146] In this embodiment, a portion of the stiffeners 33 extend along the second direction to form a third stiffener 33C, and this third stiffener 33C is connected to at least a portion of the first stiffeners 33A and the second stiffeners 33B. This third stiffener 33C further blocks the impact force in the third-direction collision direction. Combined with the dispersion effect of the first stiffeners 33A and the second stiffeners 33B along the second direction, as described above, the energy-absorbing structure 30's absorption and dissipation effect on the impact force can be further improved, thereby enhancing the protection of the battery cell 20. Simultaneously, the third stiffener 33C can also connect to the intersecting first stiffeners 33A and the second stiffeners 33B, further improving the structural strength of the energy-absorbing structure 30. Alternatively, at least two parallel and spaced third stiffeners 33C can be provided in the third-direction direction to enhance the blocking effect on the impact force in that direction; a single third stiffener 33C can also be provided in the third-direction direction.

[0147] Please refer to the reference. Figure 8 and Figure 9In one embodiment of this application, the second cavity 1a3 extends along the second direction and has a middle region 1a31 and an edge region 1a33 in the second direction. In the arrangement direction of the limiting member 60 and the first box wall 121, that is, in the third direction, the length of the middle region 1a31 is greater than the length of the edge region 1a33. Some stiffeners 33 are provided in the middle region 1a31 and some stiffeners 33 are provided in the edge region 1a33.

[0148] The middle region 1a31 refers to the position near the center line of the battery box 1 parallel to the third direction, and the edge region 1a33 refers to the position near the side of the battery box 1 in the third direction. In the third direction, the length of the middle region 1a31 is greater than the length of the edge region 1a33, so that the length of the stiffener 33 located in the middle region 1a31 in the third direction can be greater than the length of the stiffener 33 located in the edge region 1a33.

[0149] In this embodiment, when the vehicle 1000 encounters an obstacle during driving, if the obstacle covers the corresponding middle region 1a31, it indicates that the obstacle is relatively large, covering a relatively large area of ​​the vehicle 1000's corresponding edge region 1a33 and middle region 1a31, resulting in a relatively large collision impact force. If the obstacle covers the edge region 1a33, it indicates that the obstacle is relatively small, covering only a relatively small area of ​​the vehicle 1000's corresponding edge region 1a33, resulting in a relatively small collision impact force. Therefore, by setting the length of the rib 33 located in the middle region 1a31 to be greater than that of the rib 33 located in the edge region 1a33, the energy-absorbing structure 30 in the middle region 1a31 can absorb and dissipate the impact force of a collision more effectively than the energy-absorbing structure 30 in the edge region 1a33. Thus, when the battery device 100 is subjected to a relatively large impact, the energy-absorbing structure 30 in the middle region 1a31, with its higher capacity for absorbing and dissipating the impact force, can effectively absorb and dissipate the larger impact force, improving the protection effect on the battery cell 20. Meanwhile, the rib 33 in the edge region 1a33 is relatively shorter, which allows for effective absorption and dissipation of smaller impact forces while reducing the overall volume of the battery device 100 and minimizing its space occupation on the vehicle 1000.

[0150] Please refer to the reference. Figure 8 and Figure 9In one embodiment of this application, in order to further improve the energy-absorbing structure 30 in the intermediate region 1a31 to absorb and dissipate the impact force of collision, at least some of the stiffeners 33 in the intermediate region 1a31 can be arranged in a cross pattern as described above to enclose and form a hole 335. At this time, the first stiffener 33A, the second stiffener 33B, and the third stiffener 33C can be arranged in the intermediate region 1a31.

[0151] Please refer to the reference. Figure 8 and Figure 9 In one embodiment of this application, since the second cavity 1a3 is relatively narrow in the edge region 1a33, in order to improve the convenience of arranging the stiffeners 33, multiple stiffeners 33 located in the edge region 1a33 can all extend along the arrangement direction of the limiting member 60 and the first box wall 121, that is, the third direction, and be arranged side by side at intervals in the second direction. At this time, the stiffeners 33 extending along the third direction can be formed as the fourth stiffener 33D.

[0152] Of course, in some embodiments, a fourth stiffener 33D may also be provided in the intermediate region 1a31.

[0153] In addition, in some embodiments, the limiting member 60 and the first box wall 121 can be equally spaced, so that the lengths of the middle region 1a31 and the edge region 1a33 in the third direction are equal, and thus the first stiffener 33A, the second stiffener 33B and the third stiffener 33C can be provided in both the middle region 1a31 and the edge region 1a33.

[0154] Please refer to Figure 8 In one embodiment of this application, the stiffening plate 33 is also connected to the second box wall 122.

[0155] In this embodiment, the stiffening plate 33 is further connected to the second box wall 122, which can improve the stability of the connection of the stiffening plate 33 in the second cavity 1a3, so that the energy absorption structure 30 can stably absorb and dissipate the impact force of the collision, and improve the reliability of the operation of the energy absorption structure 30.

[0156] In one embodiment of this application, the stiffening plate 33, the limiting member 60, the first box wall 121 and the second box wall 122 are integrally formed.

[0157] An integrally molded structure refers to a structure formed through an integral molding manufacturing process. For example, at least a portion of the energy-absorbing structure 30, the limiting member 60, the first box wall 121, and the second box wall 122 can be manufactured by integral die casting. "At least a portion" of the second box wall 122 means that a portion of the second box wall 122 can be integrally molded with the energy-absorbing structure 30, the limiting member 60, and the first box wall 121. For example, the portion of the second box wall 122 between the limiting member 60 and the first box wall 121 can be integrally molded with the energy-absorbing structure 30, the limiting member 60, and the first box wall 121. Alternatively, the entire second box wall 122 can be integrally molded with the energy-absorbing structure 30, the limiting member 60, and the first box wall 121.

[0158] In this embodiment, the energy-absorbing structure 30, the limiting member 60, the first box wall 121, and the second box wall 122 are made into an integral structure, so that the connection interface between them is consistent, which is conducive to further enhancing the overall strength of this part of the structure and improving the energy-absorbing structure 30's absorption and consumption effect on collision impact force.

[0159] Of course, in other embodiments, the energy-absorbing structure 30 may also be configured to be connected to one or both of the limiting member 60, the first box wall 121, and the second box wall 122. For example, the energy-absorbing structure 30 may be configured to be connected to the limiting member 60 and the first box wall 121.

[0160] Please refer to Figure 8 In one embodiment of this application, at least some of the holes 335 can be rhomboid in shape. Due to its geometric instability, the rhomboid structure is more prone to buckling under critical loads. Therefore, upon impact, the rhomboid can be flattened from its center along the diagonal direction (i.e., the third direction), forming a long and stable plastic deformation zone. This continuous crushing process can dissipate a large amount of impact force, thereby improving the protection of the battery cell 20. Furthermore, the rhomboid shape is relatively simple, which facilitates the manufacturing of the energy-absorbing structure 30.

[0161] Of course, in other embodiments, the shape of the hole 335 can also be set as other types of quadrilaterals, triangles or hexagons, which can also make the energy-absorbing structure 30 have a better absorption and dissipation effect on the impact force, and the shape is simple and easy to manufacture. Alternatively, in some embodiments, the shape of the hole 335 can also be set as irregular shape. This application does not limit the shape of the hole 335.

[0162] Please refer to the reference. Figures 4 to 6In one embodiment of this application, the first cavity 1a1 and the second cavity 1a3 are arranged along a third direction, the second cavity 1a3 extends along a second direction, the second direction intersects with the third direction, and the energy-absorbing structure 30 is disposed on at least one side of the second cavity 1a3 in the second direction.

[0163] In this embodiment, the energy-absorbing structure 30 is disposed on at least one side of the second cavity 1a3 in the second direction, so that when the battery device 100 is applied to the vehicle 1000, the position of the energy-absorbing structure 30 can correspond to the position of the driver's seat, so as to adaptably provide anti-collision impact protection for the area at the front of the vehicle 1000 corresponding to the driver's seat that is prone to collision with obstacles during turning.

[0164] Of course, in other embodiments, energy-absorbing structures 30 may be provided on both sides of the second cavity 1a3 in the second direction, so as to expand the coverage of the energy-absorbing structures 30 and improve the protection of the battery cell 20.

[0165] Please refer to the reference. Figure 2 ,as well as Figures 4 to 6 In one embodiment of this application, the battery box 1 is provided with a heat exchange channel, and the battery device 100 further includes a pipe joint mechanism 40, which is disposed in the second cavity 1a3 and communicates with the heat exchange channel.

[0166] A heat exchange channel is a space for the flow of a heat exchange medium. This heat exchange channel can be directly mounted on the second wall 122 of the battery box 1, or it can be mounted on a liquid cooling plate located inside the battery box 1. This liquid cooling plate is heat-exchange connected to the second end face 25 or side peripheral face 26 of the battery cell 20. Furthermore, the heat exchange channel can have an inlet and an outlet, allowing the heat exchange medium to enter from the inlet and exit from the outlet. The heat exchange medium can be water, or it can be oil; this application does not limit the type of heat exchange medium. The pipe joint mechanism 40 serves two purposes: firstly, it connects the heat exchange channel; secondly, it connects with the external circulation pipe mechanism located outside the battery box 1. This allows the heat exchange medium to enter the pipe joint mechanism 40 from the outlet of the external circulation pipe mechanism, then enter the heat exchange channel from the inlet, exchange heat with the battery cell 20, and finally flow out of the channel outlet back to the pipe joint mechanism 40. Afterward, it returns to the external circulation pipe mechanism from the inlet, thus creating a continuous heat exchange cycle with the battery cell 20. The external circulation pipe mechanism includes pipes, a power pump, and a radiator. The pipes connect the power pump and the radiator in series, forming an inlet and outlet for the heat exchange medium to enter and exit. The power pump provides power for the circulation of the heat exchange medium, and the radiator dissipates heat as the heat exchange medium flows through it after exchanging heat with the battery cell 20. In addition, to facilitate the connection between the pipe connector mechanism 40 and the external circulation pipe mechanism, a portion of the pipe connector mechanism 40 can pass through the first housing wall 121 for docking with the external circulation pipe mechanism. Furthermore, the pipe connector mechanism 40 can include a connector body 41, as described below, which includes an inlet connector 411 and an outlet connector 413. The inlet connector 411 and the outlet connector 413 can be directly connected to the heat exchange channel. Alternatively, the pipe connector mechanism 40 can further include two connecting pipes 43. In this case, the inlet connector 411 and the outlet connector 413 can be indirectly connected to the heat exchange channel through the two connecting pipes 43. Additionally, the pipe connector mechanism 40 can be installed on the second housing wall 122, or it can be installed on another housing wall adjacent to the second housing wall 122 within the battery box 1, or it can be installed on the limiting member 60.

[0167] In this embodiment, the pipe connector mechanism 40 is also disposed within the second cavity 1a3, allowing the pipe connector mechanism 40 and the energy-absorbing structure 30 to share the second cavity 1a3, thereby improving the space utilization of the second cavity 1a3. Simultaneously, this also allows for a compact distribution of the pipe connector mechanism 40 and the energy-absorbing structure 30, preventing additional space occupation within the battery box 1 and facilitating the arrangement of the battery cells 20 or other mechanisms within the battery device 100.

[0168] Please refer to the reference. Figure 2 ,as well as Figures 4 to 6 The first cavity 1a1 and the second cavity 1a3 are arranged along a third direction, the second cavity 1a3 extends along a second direction, the second direction intersects with the third direction, and the energy absorption structure 30 and the pipeline joint mechanism 40 are arranged along the second direction.

[0169] The energy-absorbing structure 30 and the pipe fitting mechanism 40 are arranged along the second direction. This arrangement can include situations where the energy-absorbing structure 30 is located on at least one of the opposite sides of the pipe fitting mechanism 40 in the second direction, or between two parts of the pipe fitting mechanism 40, for example, between the inlet connector 411 and the outlet connector 413. Furthermore, the pipe fitting mechanism 40 and the energy-absorbing structure 30 can be spaced apart in the second direction, or they can be in contact on opposite sides, or they can overlap. Contact on opposite sides means that the pipe fitting mechanism 40 and the energy-absorbing structure 30 on the same side are neither spaced apart nor overlapped in the second direction. When the pipe fitting mechanism 40 and the energy-absorbing structure 30 are spaced apart in the second direction, they do not interfere with each other, facilitating their installation. When the pipe fitting mechanism 40 and the energy-absorbing structure 30 are overlapped in the second direction, their compact distribution is improved. Furthermore, the pipe connector mechanism 40 can be located at the center of the battery box 1 in the third direction, or it can be located on at least one side of the battery box 1 in the second direction. Similarly, the energy-absorbing structure 30 can be located at the center of the battery box 1 in the second direction, or it can be located on at least one side of the battery box 1 in the second direction. That is, this application does not limit the third-direction orientation of the pipe connector mechanism 40 and the energy-absorbing structure 30 within the battery box 1, nor does it limit the spacing between the pipe connector mechanism 40 and the energy-absorbing structure 30 in the second direction, or the contact or overlap between their opposing sides.

[0170] In this embodiment, since the battery cell assembly 20A typically includes multiple battery cells 20, and some of the battery cells 20 are arranged along the second direction to improve the energy density of the battery device 100, the limiting member 60 can also be configured to extend along the second direction to correspond to the multiple battery cells 20 arranged along the second direction. After the limiting member 60 extends along the second direction, the second cavity 1a3 can also extend along the second direction. At this time, the energy-absorbing structure 30 and the pipe connector mechanism 40 are also arranged along the second direction, allowing for adaptive use of the space in the second cavity 1a3 in the second direction, improving the convenience and compactness of arranging the pipe connector mechanism 40 and the energy-absorbing mechanism.

[0171] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the pipeline connector mechanism 40 includes a connector body 41, which includes an inlet connector 411 and an outlet connector 413. The inlet connector 411 and the outlet connector 413 are respectively connected to the heat exchange channel and are arranged side by side in the second direction. The connector body 41 is provided with an energy absorption structure 30 on at least one side in the third direction.

[0172] The liquid inlet connector 411 may partially penetrate the first wall 121 of the battery box 1, allowing it to be exposed on the outside of the battery box 1, thus facilitating its connection with the liquid outlet in the external circulation pipeline mechanism described above. The liquid inlet connector 411 may extend partially along the first direction, with another portion bent towards the first wall 121, forming an L-shape for protrusion within the wall 121. Of course, in other embodiments, the liquid inlet connector 411 may have other shapes, which are not limited in this application. Similarly, the liquid outlet connector 413 may also partially penetrate the first wall 121 of the battery box 1, allowing it to be exposed on the outside of the battery box 1, thus facilitating its connection with the liquid inlet in the external circulation pipeline mechanism described above. The liquid outlet connector 413 can extend partially along the first direction, with the other part bent towards the first tank wall 121, so that the liquid outlet connector 413 can form an L-shape for exposure within the first tank wall 121. Of course, in other embodiments, the liquid outlet connector 413 can also have other shapes, and this application does not limit this. Furthermore, the connector body 41 has an energy-absorbing structure 30 on at least one side in the second direction. This means that the energy-absorbing structure 30 can be provided only on the side of the inlet connector 411 facing away from the liquid outlet connector 413, or only on the side of the liquid outlet connector 413 facing away from the inlet connector 411. Alternatively, the energy-absorbing structure 30 can be provided on both the side of the inlet connector 411 facing away from the liquid outlet connector 413 and the side of the liquid outlet connector 413 facing away from the inlet connector 411.

[0173] In this embodiment, the inlet connector 411 and outlet connector 413 in the connector body 41 are arranged side by side along the second direction, which allows for adaptive use of the space in the second cavity 1a3 in the second direction, improving the convenience and compactness of the pipeline connector mechanism 40 arrangement. Simultaneously, when the inlet connector 411 and outlet connector 413 are arranged side by side, it also facilitates the external circulation pipeline mechanism to be centrally connected to the inlet connector 411 and outlet connector 413 at that location, improving the convenience of assembly. Furthermore, by placing the energy-absorbing structure 30 on at least one side of the connector body 41 in the second direction, it is possible to conveniently arrange the inlet connector 411 and outlet connector 413 side by side. At the same time, it ensures that the energy-absorbing structure 30 does not interfere with the connection between the inlet connector 411 and outlet connector 413 and the external circulation pipeline mechanism.

[0174] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the connector body 41 may further include a mounting base 415, on which the inlet connector 411 and the outlet connector 413 may be mounted. The mounting base 415 is larger in volume than the inlet connector 411 and the outlet connector 413, and it is also convenient to set up a connection structure, thereby facilitating the installation and connection of the connector body 41 to the second tank wall 122 through the mounting base 415.

[0175] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the pipe joint mechanism 40 further includes two connecting pipes 43, which are respectively disposed on both sides of the joint body 41 in the second direction and extend at least partially along the second direction; one end of the two connecting pipes 43 is connected to the liquid inlet joint 411 and the liquid outlet joint 413 respectively, and the other end is connected to the heat exchange channel; the energy absorption structure 30 and the connecting pipes 43 located on the same side of the joint body 41 are arranged overlapping in the second direction.

[0176] The connecting pipe 43 can be used to connect the liquid inlet connector 411 to the inlet of the heat exchange channel, and to connect the liquid outlet connector 413 to the outlet of the heat exchange channel. The connecting pipe 43 extends at least partially along the second direction, meaning that the connecting pipe 43 can extend completely along the second direction in a linear shape, or it can extend partially along the second direction with another portion bent towards the limiting member 60.

[0177] In this embodiment, the inlet connector 411 and outlet connector 413 can be connected to the heat exchange channel via connecting pipe 43. This reduces the positional requirements of the inlet and outlet connectors of the heat exchange channel, thereby improving the convenience of connecting the pipe connector mechanism 40 to the heat exchange channel. Furthermore, the two connecting pipes 43 are distributed on both sides of the connector body 41 in the second direction, and at least partially extend along the second direction. Simultaneously, the energy-absorbing structure 30 is also disposed on at least one side of the connector body 41 in the second direction. This ensures that both the components inside the pipe connector mechanism 40 and the pipe connector mechanism 40 and the energy-absorbing structure 30 are arranged along the second direction, facilitating the utilization of the space in the second cavity 1a3 in the second direction. Furthermore, the energy-absorbing structure 30 and connecting pipe 43 located on the same side of the connector body 41 are arranged overlapping in the second direction, improving the compactness of their distribution.

[0178] Of course, in other embodiments, the energy-absorbing structure 30 and the connecting pipe 43 located on the same side of the connector body 41 can also be arranged at intervals in the second direction, so that the energy-absorbing structure 30 and the connecting pipe 43 can be arranged in separate zones, making it less likely for them to interfere with each other and improving the convenience of their installation and arrangement.

[0179] Furthermore, in one embodiment of this application, the energy-absorbing structure 30 and the connecting pipe 43 located on the same side of the connector body 41 may also be in contact on opposite sides in the second direction.

[0180] In another embodiment of this application, the two connecting pipes 43 may also be disposed on the same side of the connector body 41, or on adjacent sides.

[0181] Please refer to the reference. Figures 4 to 8 In one embodiment of this application, when the energy-absorbing structure 30 and the connecting pipe 43 are arranged overlapping on the same side of the connector body 41, the energy-absorbing structure 30 is provided with a relief groove 31, which at least penetrates the side of the energy-absorbing structure 30 facing the connector body 41 in the second direction, and at least a portion of the connecting pipe 43 is accommodated in the relief groove 31.

[0182] The clearance groove 31 can be extended along the extension direction of the connecting pipe 43. The clearance groove 31 can penetrate only the side of the energy-absorbing structure 30 facing the connector body 41 in the second direction, or it can further penetrate the side of the energy-absorbing structure 30 facing the third box wall 125 of the battery box 1 as described below, so as to improve the convenience of placing the connecting pipe 43 in the clearance groove 31.

[0183] In this embodiment, the clearance groove 31 can accommodate at least a portion of the connecting pipe 43 located on the same side of the connector body 41 as the energy-absorbing structure 30, thereby improving the compactness of the distribution between the pipe connector mechanism 40 and the energy-absorbing structure 30. When the energy-absorbing structure 30 is configured as described above, including multiple vertically arranged stiffeners 33, it can be formed by a third stiffener 33C enclosing a first stiffener 33A or a second stiffener 33B. Furthermore, the clearance groove 31 may contain stiffeners 33, and the height of these stiffeners 33 in the first direction may be lower than that of the other stiffeners 33. Alternatively, the clearance groove 31 may not contain stiffeners 33, and the exposed portion is the second box wall 122. In other embodiments, the connector body 41 may also be disposed within the clearance groove 31, or the entire pipe connector mechanism 40 may be disposed within the clearance groove 31, ensuring that the clearance groove 31 can accommodate at least a portion of the pipe connector mechanism 40. When the entire pipeline connector mechanism 40 is set in the clearance groove 31, the clearance groove 31 may only penetrate at least one side of the energy absorption structure 30 in the first direction, or it may further penetrate the side facing the first tank wall 121 so that the liquid inlet connector 411 and the liquid outlet connector 413 can penetrate the first tank wall 121 and be exposed.

[0184] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the battery box 1 further has a third box wall 125 that is spaced apart from the second box wall 122, and the clearance groove 31 penetrates at least through the side of the energy-absorbing structure 30 facing the third box wall 125; the battery device 100 further includes a reinforcing member 70, which is disposed on the side of the energy-absorbing structure 30 facing the third box wall 125 and covers at least a portion of the clearance groove 31, and the reinforcing member 70 connects at least the portions of the energy-absorbing structure 30 located on opposite sides of the clearance groove 31.

[0185] The third box wall 125 can be formed by the wall surface of the second box wall 122 corresponding to the box body 12 in the box cover 11, serving as the top wall of the battery box 1. The reinforcing member 70 can be a flat plate structure, or it can be a plate structure that partially protrudes towards one side of the third box wall 125. The reinforcing member 70 connects at least the portions of the energy-absorbing structure 30 located on opposite sides of the clearance groove 31. That is, the reinforcing member 70 can connect only the opposite sides of the energy-absorbing structure 30 located in the clearance groove 31, or it can connect the three adjacent sides of the energy-absorbing structure 30 located in the clearance groove 31. In addition, the reinforcing member 70 and the energy-absorbing structure 30 can be connected by screws, welding, or adhesive. This application does not limit the connection method between the reinforcing member 70 and the energy-absorbing structure 30.

[0186] In this embodiment, a reinforcing member 70 is provided at the opening of the clearance groove 31 facing the third box wall 125, and a connection relationship is established between the reinforcing member 70 and the energy-absorbing structure 30. This allows the reinforcing member 70 to strengthen the energy-absorbing structure 30 so that the energy-absorbing structure 30 can still meet the strength requirements after the clearance groove 31 is opened.

[0187] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the pipe joint mechanism 40 is located at the middle position of the second cavity 1a3 in the second direction, and the energy absorption structure 30 is located on at least one side of the second cavity 1a3 in the second direction.

[0188] In this embodiment, the pipe connector mechanism 40 is positioned at the center of the second direction of the second cavity 1a3, allowing the heat exchange channel to connect with the pipe connector mechanism 40 to be centrally located. This facilitates the uniform arrangement of the heat exchange channel on the second wall 122, improving the temperature uniformity of the battery cells 20. At least a portion of the energy-absorbing structure 30 is positioned on at least one side of the second direction of the second cavity 1a3, facilitating the orderly arrangement of the pipe connector mechanism 40 and the energy-absorbing structure 30 within the second cavity 1a3. Especially when the energy-absorbing structure 30 is equipped with a clearance groove 31, as described above, the compactness of the distribution between the pipe connector mechanism 40 and the energy-absorbing structure 30 is further enhanced while maintaining the central positioning of the pipe connector mechanism 40. Of course, in other embodiments, when the pipe joint mechanism 40 is located at the middle position in the second direction of the second cavity 1a3 and the energy absorption structure 30 is located on at least one side of the two sides in the second direction of the second cavity 1a3, the pipe joint mechanism 40 and the energy absorption structure 30 may also be spaced apart in the second direction, or the two sides facing each other may be in contact.

[0189] In one embodiment of this application, the energy-absorbing structure 30 is disposed on both sides of the second cavity 1a3 in the second direction. In this case, having energy-absorbing structures 30 on both sides of the second cavity 1a3 in the second direction increases the coverage of the energy-absorbing structures 30, thereby improving the absorption and dissipation effect of the impact force. The pipe joint mechanism 40 and the energy-absorbing structures 30 distributed on both sides in the second direction can be spaced apart. Alternatively, the pipe joint mechanism 40 can overlap with at least one of the energy-absorbing structures 30 in the third direction, such that the at least one energy-absorbing structure 30 has the clearance groove 31 described above. Or, the pipe joint mechanism 40 can be in contact with each of the energy-absorbing structures 30 on opposite sides in the third direction.

[0190] Furthermore, the energy-absorbing structures 30 located on both sides of the second cavity 1a3 in the second direction can be of the same type, for example, both can be configured as a structure including multiple stiffeners 33. In this case, the arrangement of the stiffeners 33 in the energy-absorbing structures 30 on both sides can be the same, for example, the multiple stiffeners 33 in the energy-absorbing structures 30 on both sides can be at least partially arranged in a crisscross pattern to form a hole 335, as described above. Of course, the arrangement of the stiffeners 33 in the energy-absorbing structures 30 on both sides can also be different, for example, the multiple stiffeners 33 in one side of the energy-absorbing structure 30 can be at least partially arranged in a crisscross pattern to form a hole 335, while the multiple stiffeners 33 in the energy-absorbing structure 30 on the other side can be arranged at intervals. Of course, the types of the energy-absorbing structures 30 on both sides can also be different, for example, the energy-absorbing structure 30 on one side can be configured as a structure including multiple stiffeners 33, while the energy-absorbing structure 30 on the other side can be configured as a spring structure.

[0191] In one embodiment of this application, the energy-absorbing structure 30 is disposed on one side of the second cavity 1a3 in the second direction. This simplifies the structural configuration of the battery device 100, improves manufacturing convenience, and reduces manufacturing costs. Simultaneously, when the battery device 100 is applied to the vehicle 1000, the position of the energy-absorbing structure 30 can correspond to the driver's seat position, thus providing adaptive anti-collision protection for the area at the front of the vehicle 1000 corresponding to the driver's seat, where collisions with obstacles are likely during turning.

[0192] In one embodiment of this application, the pipe connector and the energy-absorbing structure 30 are respectively located on opposite sides of the second cavity 1a3 in the second direction. By placing the pipe connector and the energy-absorbing structure 30, located on the same side of the battery cell assembly 20A, on opposite sides of the second cavity 1a3 in the second direction, sufficient space is provided on each side for their arrangement, facilitating the spaced arrangement of the pipe connector and the energy-absorbing structure 30 in the second direction. Simultaneously, this allows for a larger installation volume of the energy-absorbing structure 30 within sufficient space, thereby expanding its coverage area and improving its absorption and dissipation effect against impact forces.

[0193] Alternatively, in some embodiments, the pipe joint mechanism 40 and the energy-absorbing structure 30 may be disposed on the same side in the second direction of the second cavity 1a3, and the pipe joint mechanism 40 and the energy-absorbing structure 30 may be disposed at intervals in the second direction, or disposed in contact on opposite sides, or disposed in overlapping arrangement.

[0194] In one embodiment of this application, the inlet connector 411 and the outlet connector 413 are respectively disposed on opposite sides of the second cavity 1a3 in the second direction, and the energy absorption structure 30 is disposed between the inlet connector 411 and the outlet connector 413.

[0195] In this embodiment, the liquid inlet connector 411 and the liquid outlet connector 413 are arranged on both sides of the battery box 1 in the second direction, so that there can be a large space between the liquid inlet connector 411 and the liquid outlet connector 413, so as to arrange a larger energy absorption structure 30, improve the coverage of the energy absorption structure 30 and improve the absorption and consumption effect of the impact force.

[0196] Please refer to the reference. Figure 5 , Figure 6 as well as Figure 8 In one embodiment of this application, the battery device 100 further includes a temperature sampling mechanism 50, which includes a temperature sensor and a sampling harness 51. The temperature sensor is located in the pipe joint mechanism 40 and is configured to detect the temperature of the heat exchange medium in the pipe joint mechanism 40. The sampling harness 51 is electrically connected to the temperature sensor. The energy absorption structure 30 has a wire groove 32 on the side facing the third box wall 125, and part of the sampling harness 51 passes through the wire groove 32.

[0197] A temperature sensor is used to detect the temperature of the heat exchange medium within the connecting pipe 43 of the pipe joint mechanism 40, in order to obtain the temperature of the heat exchange medium when it enters and / or flows out of the heat exchange channel. A sampling harness 51 has one end electrically connected to the temperature sensor and the other end connected to the battery management system (BMS) of the battery device 100. The BMS manages and maintains each battery cell 20, monitors the status of the battery device 100, and reduces the risk of overcharging and over-discharging, thereby extending the service life of the battery device 100. Simultaneously, the BMS can monitor the temperature changes of the heat exchange medium when it enters and / or flows out of the heat exchange channel, so as to provide stable and effective heat dissipation for the battery device 100. Furthermore, the BMS can be located on the side of the battery cell assembly 20A facing away from the energy-absorbing structure 30. A cable tray 32 can be used to partially accommodate the sampling harness 51. In the case where the energy-absorbing structure 30 includes multiple stiffeners 33 as described above, some of the stiffeners 33 may have a wire groove 32 on the side facing the third box wall 125.

[0198] In this embodiment, by setting a temperature sampling mechanism 50, the temperature of the heat exchange medium when entering and / or flowing out of the heat exchange channel can be sampled to monitor the heat dissipation and cooling effect on the battery device 100. Furthermore, by setting a wire groove 32 on the energy-absorbing structure 30, the energy-absorbing structure 30 can also limit the sampling wire bundle 51, improve the stability of the arrangement of the sampling wire bundle 51, and realize the multiple functions of the energy-absorbing structure 30.

[0199] Please refer to Figure 5 In one embodiment of this application, a wire-fixing structure 71 may be provided on the side of the reinforcing member 70 facing away from the energy-absorbing structure 30 to fix a portion of the sampling wire bundle 51 to the reinforcing member 70. The wire-fixing structure 71 may have a through hole for the sampling wire bundle 51 to pass through. Alternatively, the wire-fixing structure 71 may have a wire-holding groove for holding the sampling wire bundle 51. Alternatively, the wire-fixing structure 71 may include two wire-clamping arms to hold the sampling wire bundle 51; this application does not limit the structural type of the wire-fixing structure 71. Furthermore, the wire-fixing structure 71 and the reinforcing member 70 may be integrally formed. Of course, the wire-fixing structure 71 and the reinforcing member 70 may also be connected by welding, screws, or adhesive, etc.; this application does not limit the connection method between the two. The number of wire-fixing structures 71 may be one, or two or more.

[0200] In one embodiment of this application, the second box wall 122 is provided with a heat exchange channel.

[0201] In this embodiment, since each battery cell 20 in the battery cell assembly 20A is mounted on the second housing wall 122, a heat exchange channel is provided inside the second housing wall 122. This facilitates heat exchange between the heat exchange channel and each battery cell 20, improving heat dissipation and temperature uniformity of the battery cells 20. Simultaneously, when the pipe connector mechanism 40 described above is also provided on the second housing wall 122, it also facilitates connection between the pipe connector mechanism 40 and the heat exchange channel. Furthermore, the heat exchange channel can be a reciprocating S-shaped channel, or it can be a single cavity structure. This application does not limit the structural form of the heat exchange channel.

[0202] Please refer to the reference. Figure 2 ,as well as Figures 4 to 8 In one embodiment of this application, the second box wall 122 includes a main plate 1221 and an auxiliary plate 1222. The battery cell assembly 20A is disposed on the main plate 1221, and the main plate 1221 is provided with a heat exchange channel. The auxiliary plate 1222 is stacked on the side of the main plate 1221 facing the battery cell assembly 20A. The area of ​​the main plate 1221 that is misaligned with the auxiliary plate 1222 is configured to form a first cavity 1a1 with the limiting member 60, and the auxiliary plate 1222 is configured to form a second cavity 1a3 with the limiting member 60. The pipe joint mechanism 40 and the energy absorption structure 30 are disposed on the side of the auxiliary plate 1222 away from the main plate 1221. A portion of the pipe joint mechanism 40 passes through the auxiliary plate 1222 and is connected to the heat exchange channel.

[0203] The main plate 1221 serves as the main structure of the second casing wall 122, supporting the battery cells 20 and also serving as a heat exchange channel. The auxiliary plate 1222 can be stacked on top of the main plate 1221 to mount the energy-absorbing structure 30 and the pipe connector mechanism 40. The auxiliary plate 1222 may have two clearance holes 1223 for the passage of two connecting pipes 43 in the pipe connector mechanism 40, enabling communication between the two connecting pipes 43 and the inlet and outlet of the heat exchange channel.

[0204] In this embodiment, the second box wall 122 is configured to include a main body plate 1221 and an auxiliary plate 1222, allowing them to be manufactured separately and independently, thereby reducing manufacturing complexity. Especially when the energy-absorbing structure 30 is integrally formed with the second box wall 122 as described above, the energy-absorbing structure 30 and the auxiliary plate 1222 can be integrally formed. This further facilitates the separate processing and manufacturing of the main body plate 1221 with heat exchange channels, as well as the integrally formed energy-absorbing structure 30 and auxiliary plate 1222.

[0205] Additionally, the limiting member 60 described above can be positioned on the side of the auxiliary plate 1222 facing away from the main plate 1221. In this case, both the limiting member 60 and the energy-absorbing structure 30 are installed and connected to the auxiliary plate 1222, which can improve the overall structural strength. Moreover, it also facilitates the formation of an integral structure of the energy-absorbing structure 30, the limiting member 60, the auxiliary plate 1222, and the first box wall 121, as described above.

[0206] In one embodiment of this application, the battery management system is disposed within the second cavity 1a3.

[0207] In this embodiment, the battery management system is housed within the second cavity 1a3, allowing the battery management system and the energy-absorbing structure 30 to share the second cavity 1a3, thus improving the space utilization of the second cavity 1a3. Simultaneously, this also allows for a compact distribution of the battery management system and the energy-absorbing structure 30, preventing additional space occupation within the battery box 1 and facilitating the arrangement of the battery cells 20 or other mechanisms within the battery device 100.

[0208] In one embodiment of this application, the number of limiting members 60 can be two, distributed on both sides of the battery cell assembly 20A in the third-direction direction, so as to form two second cavities 1a3. In this case, energy-absorbing structures 30 can be provided in both second cavities 1a3 to absorb and dissipate the impact force transmitted from the opposite sides in the third-direction direction. Furthermore, in order to improve the space utilization of the two second cavities 1a3, the pipe connector mechanism 40 and the battery management system can be respectively arranged in the two second cavities 1a3.

[0209] Please refer to the reference. Figures 2 to 9In one embodiment of this application, the battery device 100 includes a battery box 1, a limiting member 60, a battery cell assembly 20A, and an energy-absorbing structure 30. The battery box 1 has a receiving cavity 1a. The limiting member 60 is disposed within the receiving cavity 1a, dividing the receiving cavity 1a into a first cavity 1a1 and a second cavity 1a3. The battery cell assembly 20A includes multiple battery cells 20, which are disposed within the first cavity 1a1. The energy-absorbing structure 30 is disposed within the second cavity 1a3. The battery box 1 has a first box wall 121, which is spaced relative to the limiting member 60 and configured to enclose the second cavity 1a3. The energy-absorbing structure 30 includes multiple stiffeners 33, at least one end of which is connected to the first box wall 121, and the other end is connected to the limiting member 60. At least some of the stiffeners 33 intersect to form holes 335, and the multiple holes 335 are arranged side-by-side at intervals. The battery box 1 also has a second box wall 122 adjacent to the first box wall 121. The limiting member 60 and the battery cell assembly 20A are both disposed on the second box wall 122. The second box wall 122 is also configured to enclose the limiting member 60 to form a first cavity 1a1 and a second cavity 1a3. The hole 335 extends along a first direction and intersects the second box wall 122. The battery box 1 has a first side 1b and a second side 1c opposite each other in a second direction. The first direction, the second direction, and the arrangement direction of the limiting member 60 and the first box wall 121 intersect each other. The plurality of stiffeners 33 include a first stiffener 33A and a second stiffener 33B. In the direction of the first box wall 121 toward the limiting member 60, the first stiffener 33A is gradually moved closer to one of the first side 1b and the second side 1c, and the second stiffener 33B is gradually moved closer to one of the first side 1b and the second side 1c, and intersects with the first stiffener 33A to form at least part of the hole 335. The plurality of stiffeners 33 also includes a third stiffener 33C, which extends along a second direction and is configured to intersect and enclose at least a portion of the first stiffeners 33A and the second stiffeners 33B to form at least a portion of the holes 335. The second cavity 1a3 extends along a second direction, which intersects the arrangement direction of the limiting member 60 and the first box wall 121. The second cavity 1a3 has a middle region 1a31 and an edge region 1a33 in the second direction. In the arrangement direction of the limiting member 60 and the first box wall 121, the length of the middle region 1a31 is greater than the length of the edge region 1a33. Some stiffeners 33 are provided in the middle region 1a31 and some stiffeners 33 are provided in the edge region 1a33. Among the multiple stiffening ribs 33 located in the intermediate region 1a31, at least some of the stiffening ribs 33 are arranged in a cross-shaped manner to form holes 335; the multiple stiffening ribs 33 located in the edge region 1a33 all extend along the arrangement direction of the limiting member 60 and the first box wall 121, and are arranged side by side at intervals in the second direction. The stiffening ribs 33, the limiting member 60, the first box wall 121, and the second box wall 122 are integrally formed. At least some of the holes 335 are triangular or quadrilateral in shape.The battery box 1 is provided with a heat exchange flow channel. The battery device 100 also includes a pipe joint mechanism 40, which is located in the second cavity 1a3 and communicates with the heat exchange flow channel. The first cavity 1a1 and the second cavity 1a3 are arranged along a third direction, and the second cavity 1a3 extends along a second direction, which intersects with the third direction. The energy absorption structure 30 and the pipe joint mechanism 40 are arranged along the second direction. The pipe joint mechanism 40 includes a joint body 41, which includes an inlet joint 411 and an outlet joint 413. The inlet joint 411 and the outlet joint 413 are respectively connected to the heat exchange flow channel and are arranged side by side in the second direction. The joint body 41 has an energy absorption structure 30 on at least one side in the second direction. The pipe fitting mechanism 40 also includes two connecting pipes 43, which are respectively located on both sides of the fitting body 41 in the second direction and extend at least partially along the second direction. One end of each connecting pipe 43 is connected to the liquid inlet fitting 411 and the liquid outlet fitting 413, respectively, and the other end is connected to the heat exchange channel. The energy-absorbing structure 30 and the connecting pipes 43, located on the same side of the fitting body 41, are arranged overlapping in the second direction. The energy-absorbing structure 30 is provided with a clearance groove 31, which at least penetrates the side of the energy-absorbing structure 30 facing the fitting body 41 in the second direction, and at least a portion of the connecting pipe 43 is accommodated within the clearance groove 31. The battery box 1 has a third box wall 125 spaced apart from the second box wall 122. A clearance groove 31 penetrates at least one side of the energy-absorbing structure 30 facing the third box wall 125. The battery device 100 also includes a reinforcing member 70, which is located on the side of the energy-absorbing structure 30 facing the third box wall 125 and covers at least a portion of the clearance groove 31. The reinforcing member 70 connects at least the portions of the energy-absorbing structure 30 located on opposite sides of the clearance groove 31. A pipe connector mechanism 40 is located at the middle position of the second cavity 1a3 in the second direction, and the energy-absorbing structure 30 is located on at least one side of the second cavity 1a3 in the second direction. The battery device 100 also includes a temperature sampling mechanism 50, which includes a temperature sensor and a sampling harness 51. The temperature sensor is located in the pipe connector mechanism 40 and configured to detect the temperature of the heat exchange medium within the pipe connector mechanism 40. The sampling harness 51 is electrically connected to the temperature sensor. The energy-absorbing structure 30 has a wire passage groove 32, and a portion of the sampling harness 51 passes through the wire passage groove 32. The limiting member 60 has a cavity. The battery cell 20 has a first end face 24 and a second end face 25, and a side peripheral surface 26 connecting the first end face 24 and the second end face 25. The first end face 24 is provided with an electrode post. The side peripheral surface 26 includes two opposing large surfaces 261 and two opposing small surfaces 262. The first cavity 1a1 and the second cavity 1a3 are arranged along a third direction, and the two large surfaces 261 are arranged along a third direction.

[0210] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized by, include: A battery box, wherein the battery box has a receiving cavity; A limiting member is disposed within the receiving cavity and divides the receiving cavity into a first cavity and a second cavity; A battery cell assembly, the battery cell assembly comprising a plurality of battery cells, the plurality of battery cells being disposed within the first cavity; as well as An energy-absorbing structure is disposed within the second cavity; The battery box has a first box wall, which is spaced apart from the limiting member and configured to enclose the limiting member to form the second cavity; The energy-absorbing structure includes multiple stiffeners, with at least one end of each stiffener connected to the first box wall and the other end connected to the limiting member.

2. The battery device of claim 1, wherein At least some of the stiffening plates intersect to form holes, and multiple holes are arranged side by side at intervals.

3. The battery device as claimed in claim 2, characterized in that, The battery box also has a second box wall adjacent to the first box wall, the limiting member and the battery cell assembly are both disposed on the second box wall, and the second box wall is further configured to enclose the first cavity and the second cavity with the limiting member; The hole extends along a first direction, which intersects with the second box wall.

4. The battery device as claimed in claim 3, characterized in that, The battery box has a first side and a second side opposite each other in the second direction, and the first direction, the second direction, and the arrangement direction of the limiting member and the first box wall intersect each other in pairs. The plurality of ribs includes a first rib and a second rib. In the direction of the first box wall toward the limiting member, the first rib is gradually disposed closer to one of the first side and the second side, and the second rib is gradually disposed closer to one of the first side and the second side, and intersects with the first rib to form at least part of the hole.

5. The battery device as claimed in claim 4, characterized in that, The plurality of stiffeners also includes a third stiffener that extends along the second direction and is configured to intersect and enclose at least a portion of the first stiffeners and the second stiffeners to form at least a portion of the holes.

6. The battery device as claimed in claim 1, characterized in that, The second cavity extends along a second direction, which intersects the arrangement direction of the limiting member and the first box wall; The second cavity has a middle region and an edge region in the second direction, and in the arrangement direction of the limiting member and the first box wall, the length of the middle region is greater than the length of the edge region; Some of the stiffening plates are located in the middle region, and some of the stiffening plates are located in the edge region.

7. The battery device as claimed in claim 6, characterized in that, In the plurality of stiffening plates located in the intermediate region, at least some of the stiffening plates are arranged to form holes by crossing and enclosing each other, and the plurality of holes are arranged side by side at intervals; And / or, the plurality of the reinforcing plates located in the edge region are all arranged along the arrangement direction of the limiting member and the first box wall, and are arranged side by side at intervals in the second direction.

8. The battery device as claimed in claim 1, characterized in that, The battery box also has a second box wall adjacent to the first box wall, and the limiting member and the battery cell assembly are both disposed on the second box wall; The second box wall is also configured to enclose the first cavity and the second cavity with the limiting member, and the stiffening plate is also connected to the second box wall.

9. The battery device as claimed in claim 8, characterized in that, The stiffening plate, the limiting member, the first box wall, and the second box wall are integrally formed.

10. The battery device as claimed in claim 2, characterized in that, At least some of the holes are triangular or quadrilateral in shape.

11. The battery device according to any one of claims 1 to 10, characterized in that, The first cavity and the second cavity are arranged along a third direction, the second cavity extends along a second direction, the second direction intersects the third direction, and the energy-absorbing structure is disposed on at least one side of the second cavity in the second direction.

12. The battery device according to any one of claims 1 to 10, characterized in that, The battery box is provided with a heat exchange channel, and the battery device also includes a pipe joint mechanism, which is located in the second cavity and communicates with the heat exchange channel.

13. The battery device as claimed in claim 12, characterized in that, The first cavity and the second cavity are arranged along a third direction, the second cavity extends along a second direction, the second direction intersects the third direction, and the energy-absorbing structure and the pipeline joint mechanism are arranged along the second direction.

14. The battery device as claimed in claim 13, characterized in that, The pipeline connector mechanism includes a connector body, which includes an inlet connector and an outlet connector. The liquid inlet connector and the liquid outlet connector are respectively connected to the heat exchange channel and are arranged side by side in the second direction; The energy-absorbing structure is provided on at least one side of the connector body in the second direction.

15. The battery device as claimed in claim 14, characterized in that, The pipe joint mechanism further includes two connecting pipes, which are respectively located on both sides of the joint body in the second direction, and both extend at least partially along the second direction. One end of each of the two connecting pipes is connected to the liquid inlet and the liquid outlet respectively, and the other end is connected to the heat exchange channel; The energy-absorbing structure and the connecting pipe, located on the same side of the connector body, are arranged at intervals or overlaps in the second direction.

16. The battery device as claimed in claim 15, characterized in that, When the energy-absorbing structure located on the same side of the connector body overlaps with the connecting pipe; The energy-absorbing structure is provided with a clearance groove, which at least penetrates the energy-absorbing structure on one side of the connector body in the second direction, and at least a portion of the connecting pipe is accommodated in the clearance groove.

17. The battery device as claimed in claim 12, characterized in that, The energy-absorbing structure is provided with a clearance groove, and at least a portion of the pipeline joint mechanism is accommodated within the clearance groove.

18. The battery device as claimed in claim 17, characterized in that, The battery box has a second box wall and a third box wall that are spaced apart from each other. The limiting member and the battery cell assembly are both disposed on the second box wall. The second box wall is also configured to enclose the first cavity and the second cavity with the limiting member. The clearance groove penetrates at least through the side of the energy-absorbing structure facing the third box wall. The battery device further includes a reinforcing member disposed on the side of the energy-absorbing structure facing the third box wall and covering at least a portion of the clearance groove. The reinforcing member connects at least the portions of the energy-absorbing structure located on opposite sides of the clearance groove.

19. The battery device as claimed in claim 13, characterized in that, The pipeline joint mechanism is located at the middle position of the second cavity in the second direction, and the energy absorption structure is located on at least one side of the second cavity in the second direction.

20. The battery device as claimed in claim 13, characterized in that, The pipe joint and the energy-absorbing structure are located on opposite sides of the second cavity in the second direction.

21. The battery device as claimed in claim 13, characterized in that, The pipeline connector mechanism includes a connector body, which includes an inlet connector and an outlet connector. The liquid inlet connector and the liquid outlet connector are respectively connected to the heat exchange channel and are located on opposite sides of the second cavity in the second direction; The energy-absorbing structure is located between the liquid inlet connector and the liquid outlet connector.

22. The battery device as claimed in claim 12, characterized in that, The battery device further includes a temperature sampling mechanism, which includes a temperature sensor and a sampling harness. The temperature sensor is located in the pipe joint mechanism and configured to detect the temperature of the heat exchange medium in the pipe joint mechanism. The sampling harness is electrically connected to the temperature sensor. The energy-absorbing structure is provided with a wire passage groove, and part of the sampling wire bundle passes through the wire passage groove.

23. The battery device as claimed in claim 12, characterized in that, The battery box has a second box wall, and the limiting member and the battery cell assembly are both disposed on the second box wall. The second box wall is also configured to enclose the first cavity and the second cavity with the limiting member. The second box wall is provided with the heat exchange channel.

24. The battery device as claimed in claim 23, characterized in that, The second box wall includes a main plate and an auxiliary plate, the battery cell assembly is disposed on the main plate, and the main plate is provided with the heat exchange channel; The auxiliary plate is stacked on the side of the main plate facing the battery cell assembly. The area of ​​the main plate that is misaligned with the auxiliary plate is configured to enclose the limiting member to form the first cavity. The auxiliary plate is configured to enclose the limiting member to form the second cavity. The pipe joint mechanism and the energy absorption structure are located on the side of the auxiliary plate opposite to the main plate. A portion of the pipe joint mechanism passes through the auxiliary plate and is connected to the heat exchange channel.

25. The battery device according to any one of claims 1 to 10, characterized in that, The battery device further includes a battery management system, which is located in the second cavity and electrically connected to the individual battery cells.

26. The battery device according to any one of claims 1 to 10, characterized in that, The limiting component has a cavity inside.

27. The battery device as claimed in claim 26, characterized in that, The battery cell has a first end face and a second end face opposite to each other, and a side peripheral surface connecting the first end face and the second end face. The first end face is provided with an electrode post. The side peripheral surface includes two opposing large surfaces and two opposing small surfaces. The first cavity and the second cavity are arranged along a third direction, and the two large surfaces are arranged along the third direction.

28. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 27.

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