Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises a box body, a battery pack arranged in the box body, and a plurality of battery monomers. Each battery monomer comprises a shell and an electrode terminal. A first flow channel space is arranged between battery monomers adjacent in a first direction. A pressing plate is arranged in the box body. In a second direction, the shell of each battery monomer is fixedly connected with the pressing plate and the box body. The pressing plate is provided with a avoiding area for avoiding each electrode terminal. The pressing plate is provided with a buffer part. Each first flow channel space is correspondingly provided with a buffer part. The first direction and the second direction intersect. Thus, the overall structural stability of the battery pack, the pressing plate and the box body is improved. The buffer part can provide a deformation space for the first flow channel space, improve the cooling uniformity of the plurality of battery monomers in the battery device, reduce the risk of leakage of the heat exchange medium in the first flow channel space caused by cracking of the pressing plate, and improve the use reliability of the battery device.

Description

Technical Field

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

[0002] In related technologies, a battery device contains multiple battery cells arranged sequentially within its housing. The housing has a flow channel space containing a heat exchange medium that exchanges heat with adjacent battery cells. However, the cooling effect of the multiple battery cells is uneven, leading to a decrease in the cooling efficiency of the individual cells, which affects the performance and lifespan of the battery device. Furthermore, the overall structural stability of the battery device is poor. In addition, when a battery cell expands, the pressure of the heat exchange medium in the flow channel space increases, making the flow channel space prone to leakage. This poses a short-circuit risk to the battery device and affects its reliability. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a battery device that facilitates maintaining a cooling effect, improves the cooling uniformity of multiple battery cells within the battery device, extends the battery device's lifespan, and enhances its performance.

[0004] This application also proposes an electrical device.

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

[0006] Box;

[0007] The battery pack is located inside the housing and includes multiple battery cells arranged sequentially in a first direction. Each battery cell includes a housing and electrode terminals exposed outside the housing. A first flow channel space for the flow of heat exchange medium is provided between adjacent battery cells in the first direction.

[0008] The pressure plate is located inside the housing. In the second direction, the housing of each battery cell is fixedly connected to the pressure plate and the housing. The pressure plate has a clearance area to avoid each electrode terminal. The pressure plate has multiple buffer parts arranged sequentially in the first direction. Each buffer part is deformable. Each first flow channel space is provided with a corresponding buffer part. The first direction and the second direction intersect.

[0009] In the above technical solution, the fixed connection between the shell of each battery cell and the pressure plate and the housing improves the overall structural stability of the battery pack, pressure plate, and housing, and enhances the structural strength and rigidity of the battery device. Each first flow channel space is equipped with a buffer section, which provides deformation space to accommodate the expansion and contraction of the battery cells. This helps stabilize the cross-sectional area of ​​the first flow channel space, maintains cooling efficiency, improves the cooling uniformity of multiple battery cells within the battery device, and enhances the performance and lifespan of the battery device. Furthermore, when the pressure of the heat exchange medium in the first flow channel space increases, it reduces the risk of heat exchange medium leakage due to pressure plate cracking, lowers the risk of short circuits in the battery device, and improves the reliability of the battery device.

[0010] In some embodiments, the portion of the pressure plate excluding the buffer section and the clearance area is fixedly connected to the housing of multiple battery cells.

[0011] In the above technical solution, the portion of the pressure plate excluding the buffer section and the clearance area is fixedly connected to the housing of multiple battery cells, making the pressure plate and multiple battery cells firmly connected. This is beneficial to improving the connection reliability between the pressure plate and multiple battery cells, further improving the structural strength and rigidity of the battery device, and facilitating the sealing of the gap between the pressure plate and multiple battery cells. This reduces the risk of heat exchange medium leakage in the first flow channel space. Furthermore, when the pressure of the heat exchange medium in the first flow channel space increases, it reduces the risk of the heat exchange medium in the first flow channel space leaking from the clearance area into the second space due to the separation of the pressure plate and the battery cells. This further reduces the risk of short circuit in the battery device and further improves the reliability of the battery device.

[0012] In some embodiments, the buffer portion includes a buffer ridge, which is disposed on the side of the pressure plate away from the first flow channel space.

[0013] In the above technical solution, the buffer protrusion is set on the side of the pressure plate away from the first flow channel space, which also helps to reduce the difficulty of forming the buffer part, facilitates the formation of the buffer part on the pressure plate, simplifies the structure of the pressure plate, thereby improving the production efficiency of the pressure plate. In addition, the pressure plate can be produced with one mold, which helps to reduce the production cost of the pressure plate.

[0014] In some embodiments, the buffer ridge is formed into a rectangle in the cross section of the third direction, and the third direction intersects with the first direction and the second direction respectively.

[0015] In the above technical solution, the buffer ridge is formed into a rectangle in the third direction. While maintaining the structural strength of the buffer part, it is conducive to the deformation of the buffer part and makes it easier for the pressure plate to adapt to the expansion and contraction of the battery cells, thus making the cross-sectional shape of the buffer part in the third direction reasonable.

[0016] In some embodiments, the outer periphery of the pressure plate is sealed and fixed to the frame of the housing.

[0017] In the above technical solution, by sealing and fixing the outer periphery of the pressure plate to the frame of the housing, the circumferential edge of the pressure plate can be sealed with the frame of the housing, thereby improving the sealing performance of the first space, further reducing the risk of heat exchange medium leakage from the first flow channel space to the second space, further reducing the risk of short circuit of the battery device, further improving the reliability of the battery device, and also helping to improve the connection reliability between the pressure plate and multiple battery cells, and further improving the structural strength and rigidity of the battery device.

[0018] In some embodiments, the pressure plate and the frame are fixedly connected by a fastener, and the gap between the fastener and the pressure plate is filled with sealant.

[0019] In the above technical solution, the pressure plate and the frame are fixedly connected by a fixing connector. The fixing connector can reliably connect the pressure plate and the frame, reducing the risk of separation between the pressure plate and the frame. Furthermore, the gap between the fixing connector and the pressure plate is filled with sealant, which can bond and fix the fixing connector and the pressure plate, reducing the risk of separation between the fixing connector and the pressure plate. The sealant can seal the gap between the fixing connector and the pressure plate, further improving the sealing performance of the first space, further reducing the risk of heat exchange medium leakage from the first space to the second space, further reducing the risk of short circuit in the battery device, and further improving the reliability of the battery device. At the same time, it is more conducive to improving the connection reliability between the pressure plate and multiple battery cells, and further improving the structural strength and rigidity of the battery device.

[0020] In some embodiments, there are multiple battery packs, which are arranged along a third direction. The pressure plate is fixedly connected to each individual battery cell of the multiple battery packs, and the third direction intersects with the first direction and the second direction respectively.

[0021] In the above technical solution, by arranging multiple battery packs along a third direction, the positions of the multiple battery packs can be arranged reasonably, which is conducive to simplifying the internal structure of the battery device and improving the assembly efficiency of the battery device. Furthermore, by fixing the pressure plate to each battery cell of the multiple battery packs, it is more conducive to improving the overall structural stability of the multiple battery packs, the pressure plate and the housing, and further improving the structural strength and rigidity of the battery device.

[0022] In some embodiments, the buffer extends along a third direction, and at least one buffer is opposite each battery pack along a second direction, the third direction intersecting the first direction and the second direction respectively.

[0023] In the above technical solution, by having at least one buffer section opposite each battery pack along the second direction, it is more conducive to maintaining the cooling effect, further improving the cooling uniformity of multiple battery cells in the battery device, further improving the performance and life of the battery device, and when the pressure of the heat exchange medium in the first flow channel space increases, it further reduces the risk of leakage of the heat exchange medium in the first flow channel space due to cracking of the pressure plate, further reduces the risk of short circuit in the battery device, and further improves the reliability of the battery device.

[0024] In some embodiments, the housing includes adjacent first sidewalls and second sidewalls, the first sidewall being the sidewall with the largest area in the housing, and the first sidewalls of the two adjacent housings defining a first flow channel space.

[0025] In the above technical solution, a first flow channel space is defined between the two first side walls of two adjacent shells. When the heat exchange medium flows into the first flow channel space, it is beneficial to increase the contact area between the shell and the heat exchange medium, thereby increasing the heat exchange area between the shell and the heat exchange medium, which can further improve the heat exchange efficiency, further improve the heat exchange uniformity of multiple battery cells, and further improve the performance and life of the battery device.

[0026] In some embodiments, the battery device further includes a separator assembly, wherein the separator assembly is provided between adjacent battery cells in a first direction to separate a first flow channel space, and a pressure plate is located on the side of the separator assembly opposite to the first flow channel space.

[0027] In the above technical solution, a separator component is provided between adjacent battery cells. The separator component can support two adjacent battery cells and reliably separate adjacent battery cells. This helps to maintain the flow cross-sectional area of ​​the first flow channel space, better maintain the cooling effect, maintain the heat exchange efficiency, and further improve the cooling uniformity of multiple battery cells in the battery device. Furthermore, by setting the pressure plate on the side of the separator component away from the first flow channel space, the pressure plate can protect the separator component and reduce the risk of damage to the separator component, thereby making the arrangement of the separator component reasonable.

[0028] In some embodiments, the partition component is fixed to the housing.

[0029] In the above technical solution, fixing the separator to the housing helps to improve the positional stability of the separator and reduce the risk of the separator moving. This allows the separator to reliably support the two adjacent battery cells, which is more conducive to maintaining the flow cross-sectional area of ​​the first flow channel space.

[0030] In some embodiments, the separating component includes:

[0031] The first seal is used to seal the gap between the housings of adjacent battery cells and to seal the gap between the housing and the casing.

[0032] The first support member is located on the outer periphery of the top of the housing and is used to support the first seal member. The first seal member is used to fix the first support member to the housing and to seal the connection between the first support member and the housing.

[0033] In the above technical solution, by setting a first sealing element, the sealing performance and stability of the first flow channel space located between adjacent battery cells are improved, which is beneficial to improving the sealing performance and stability of the second flow channel space located between the battery cell and the housing. It is also beneficial to reduce the risk of heat exchange medium leakage from the gap between the first support and the housing. By setting a first support on the housing, the first sealing element can be set, and the first support can also provide elastic support to the battery cell, which is beneficial to overcoming the expansion of the battery cell and can also play a role in buffering mechanical collisions, further improving the sealing performance and stability of the first and second flow channel spaces.

[0034] In some embodiments, the battery device further includes a flow guiding component disposed within a first flow channel space and connected to the housing, for dividing the first flow channel space to form a flow guiding path.

[0035] In the above technical solution, by setting a flow guiding component, the first flow channel space is divided to form a flow guiding path. The flow guiding path is conducive to optimizing the flow path of the heat exchange medium in the first flow channel space, so as to guide the heat exchange medium to flow in an orderly and rapid manner, improve the flow effect of the heat exchange medium in the first flow channel space, and reduce the occurrence of the heat exchange medium not being able to be discharged in time after heat exchange, thereby improving the heat exchange effect between the heat exchange medium and the battery cell.

[0036] In some embodiments, the battery device further includes a turbulence protrusion disposed on the pressure plate and extending toward the first flow channel space.

[0037] In the above technical solution, by setting turbulence protrusions extending toward the first flow channel space on the pressure plate, the flow direction of the heat exchange medium is changed, which is beneficial to increasing the Reynolds number of the heat exchange medium and improving the turbulence effect when the heat exchange medium flows in the first flow channel space. This is beneficial to increasing the heat transfer coefficient of the heat exchange medium, improving the heat exchange effect of the heat exchange medium on the battery cells, and thus improving the temperature uniformity of the battery cells.

[0038] Secondly, embodiments of this application also provide an electrical device, which includes the aforementioned battery device, the battery device being used to store or provide electrical energy.

[0039] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0041] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of a battery device according to an embodiment of this application;

[0043] Figure 3 This is a top view of a battery device according to an embodiment of this application;

[0044] Figure 4 yes Figure 3 Sectional view at point AA;

[0045] Figure 5 yes Figure 4 Enlarged view at point B in the middle;

[0046] Figure 6 This is a schematic diagram of the pressure plate according to an embodiment of this application;

[0047] Figure 7 yes Figure 6 Enlarged view at point C;

[0048] Figure 8 This is a schematic diagram of a battery cell according to an embodiment of this application.

[0049] Figure label:

[0050] Battery device 100;

[0051] Box body 10; second box body 11; supporting wall 12; first space 13; frame 14; supporting beam 15; connecting channel 16; heat exchange medium inlet 17; heat exchange medium outlet 18;

[0052] Battery pack 20;

[0053] 21 battery cells;

[0054] Housing 211; Electrode terminal 212; First sidewall 213; Second sidewall 214; Explosion-proof structure 215;

[0055] First flow channel space 30;

[0056] Pressure plate 40; clearance area 41; buffer part 42; first clearance hole 43; second clearance hole 44;

[0057] Separator 60; First seal 61; First support 62;

[0058] Flow guiding component 70; Flow guiding path 71; Branch flow path 73; Main inlet flow path 74; Main outlet flow path 75;

[0059] 80mm turbulence protrusion;

[0060] Vehicle 400; Controller 401; Motor 402. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0063] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, E and / or F can represent: E existing alone, E and F existing simultaneously, or F existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0066] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0067] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0068] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0069] In this application, "multiple" means two or more (including two).

[0070] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0071] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0072] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0073] The battery device mentioned in the embodiments of this application may include one or more battery packs for providing voltage and capacity. The battery pack may include multiple individual battery cells, which are connected in series, parallel, or mixed connections via busbars.

[0074] In some embodiments, the battery pack is typically formed by arranging multiple battery cells.

[0075] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery packs housed within the housing.

[0076] As an example, a battery pack can be housed in a housing by directly fixing multiple individual battery cells to the housing.

[0077] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure, which can house the battery pack, i.e., the battery pack is installed within the closed space. Here, "closed" means covered or closed, which can be sealed or not sealed. The first enclosure may be one of the upper enclosure and the lower enclosure, and the second enclosure may be the other of the upper enclosure and the lower enclosure.

[0078] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0079] A battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of an anode electrode, a cathode electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the anode and cathode electrodes. The anode electrode includes an anode current collector and an anode active material layer. The anode active material layer is coated on the surface of the anode current collector. The uncoated anode current collector protrudes beyond the coated anode current collector and serves as the anode tab. Taking a lithium-ion battery as an example, the anode current collector can be made of aluminum, and the anode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The cathode electrode includes a cathode current collector and a cathode active material layer. The cathode active material layer is coated on the surface of the cathode current collector. The uncoated cathode current collector protrudes beyond the coated cathode current collector and serves as the cathode tab. The cathode current collector can be made of copper, and the cathode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple anode tabs stacked together, and there are multiple cathode tabs stacked together.

[0080] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0081] In recent years, battery devices have developed rapidly and can be installed in vehicles, laptops, electric bicycles, electric toys, etc. This application uses the installation of battery devices in new energy vehicles as an example for illustration. In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and crucial role. As a core component of new energy vehicles, battery devices have high requirements in terms of reliability.

[0082] The battery pack contains multiple battery cells arranged sequentially within its housing. The housing contains a flow channel space where a heat exchange medium exchanges heat with adjacent battery cells. However, the cooling effect of the multiple battery cells is uneven, leading to reduced cooling efficiency and impacting the battery pack's performance and lifespan. Furthermore, the overall structural stability of the battery pack is poor. Additionally, when the pressure of the heat exchange medium in the flow channel space increases, leakage is likely to occur, posing a short-circuit risk and affecting the battery pack's reliability.

[0083] Based on the above considerations, in order to solve the problems of poor performance and short lifespan of the battery device caused by uneven cooling of multiple battery cells, and to solve the problem of poor reliability of the battery device, a battery device was designed after in-depth research, including: a housing; a battery pack, the battery pack being disposed in the housing, the battery pack including multiple battery cells arranged sequentially in a first direction, each battery cell including a shell and electrode terminals exposed outside the shell, a first flow channel space for the flow of heat exchange medium between adjacent battery cells in the first direction; a pressure plate, the pressure plate being disposed in the housing, in a second direction, the shell of each battery cell being fixedly connected to the pressure plate and the housing respectively, the pressure plate having a clearance area to avoid each electrode terminal, the pressure plate having multiple buffer parts arranged sequentially in the first direction, each buffer part being deformable, each first flow channel space corresponding to a buffer part, the first direction and the second direction intersecting. By fixing the casing of each battery cell to the pressure plate and the housing, the overall structural stability of the battery pack, pressure plate, and housing is improved. Each first flow channel space is equipped with a buffer section, which provides deformation space for the first flow channel space to adapt to the expansion and contraction of the battery cells. This helps to stabilize the cross-sectional area of ​​the flow channel space, maintain the cooling effect, improve the cooling uniformity of multiple battery cells in the battery device, and improve the performance and lifespan of the battery device. Furthermore, when the pressure of the heat exchange medium in the first flow channel space increases, it reduces the risk of heat exchange medium leakage caused by pressure plate cracking, reduces the risk of short circuit in the battery device, and improves the reliability of the battery device.

[0084] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 400 provided in some embodiments of this application. The vehicle 400 can be a gasoline-powered vehicle or a new energy vehicle; a new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is mounted on the chassis of the vehicle 400. The battery device 100 can be used to power the vehicle 400; for example, the battery device 100 can serve as the operating power source for the vehicle 400. The vehicle 400 may also include a controller 401 and a motor 402. The controller 401 is used to control the battery device 100 to supply power to the motor 402, for example, to meet the power needs of the vehicle 400 during starting, navigation, and driving.

[0085] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 400, but also as the driving power source for the vehicle 400, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 400.

[0086] The following is for reference. Figures 2-7 The battery device 100 according to an embodiment of this application will be described, taking the battery device 100 installed in the chassis of a vehicle 400 as an example.

[0087] like Figures 2-7 As shown, the battery device 100 according to an embodiment of this application includes: a housing 10; a battery pack 20, the battery pack 20 being disposed within the housing 10, the battery pack 20 including a plurality of battery cells 21 arranged sequentially in a first direction, each battery cell 21 including a housing 211 and an electrode terminal 212 exposed outside the housing 211, a first flow channel space 30 for circulating heat exchange medium is provided between adjacent battery cells 21 in the first direction; a pressure plate 40, the pressure plate 40 being disposed in the housing 10, in a second direction, the housing 211 of each battery cell 21 being fixedly connected to the pressure plate 40 and the housing 10 respectively, the pressure plate 40 having a clearance area 41 for avoiding each electrode terminal 212, the pressure plate 40 having a plurality of buffer portions 42 arranged sequentially in the first direction, each buffer portion 42 being deformable, each first flow channel space 30 correspondingly having a buffer portion 42, the first direction and the second direction intersecting.

[0088] The battery assembly 100 includes a housing 10, a battery pack 20, and a pressure plate 40. The housing 10 defines an enclosed space. The battery pack 20 can be disposed within the enclosed space of the housing 10. As an example, the housing 10 may include a first housing (not shown) and a second housing 11, the first housing being an upper housing and the second housing 11 being a lower housing, the first housing and the second housing 11 being fixedly connected to jointly define the enclosed space.

[0089] The battery pack 20 includes multiple battery cells 21, which are arranged sequentially in a first direction, such as... Figure 2 As shown, when the battery device 100 is Figure 2When placed in the center direction, the first direction refers to Figure 1 In the X direction. Each battery cell 21 includes a housing 211 and electrode terminals 212 exposed outside the housing 211. As an example, each battery cell 21 may have two electrode terminals 212, which are respectively a positive terminal and a negative terminal. In the first direction, a first flow channel space 30 is provided between any two adjacent battery cells 21 for the flow of heat exchange medium. As an example, any two adjacent battery cells 21 are spaced apart along the first direction to form the first flow channel space 30 between the two adjacent battery cells 21.

[0090] It should be noted that a heat exchange medium flows within the enclosed space, and at least a portion of each battery cell 21 can be immersed in the heat exchange medium. When the heat exchange medium flows within the first flow channel space 30, it can directly contact the casing 211 of the battery cell 21, which is beneficial to improving the heat exchange efficiency between the heat exchange medium and the battery cell 21, and to ensuring uniform heat exchange among multiple battery cells 21. This reduces the risk of some battery cells 21 overheating due to insufficient heat exchange, thereby extending the service life of the battery device 100 and improving its performance.

[0091] As an example, housing 10 may have a heat exchange medium inlet 17 and a heat exchange medium outlet 18. Further, second housing 11 may have a heat exchange medium inlet 17 and a heat exchange medium outlet 18. First flow channel space 30 connects heat exchange medium inlet 17 and heat exchange medium outlet 18. Heat exchange medium flows into first flow channel space 30 through heat exchange medium inlet 17. Heat exchange medium in first flow channel space 30 flows out of battery device 100 through heat exchange medium outlet 18.

[0092] As another example, housing 10 may have a heat exchange medium inlet 17 and a heat exchange medium outlet 18. Further, second housing 11 may also have a heat exchange medium inlet 17 and a heat exchange medium outlet 18. A closed space connects the heat exchange medium inlet 17 and the heat exchange medium outlet 18. A first flow channel space 30 is located within the closed space, connecting the heat exchange medium inlet 17 and the first flow channel space 30. The closed space also connects the heat exchange medium outlet 18 and the first flow channel space 30. Heat exchange medium flowing in from the heat exchange medium inlet 17 flows into the first flow channel space 30 through the closed space, and heat exchange medium within the first flow channel space 30 flows into the heat exchange medium outlet 18 through the closed space.

[0093] Pressure plate 40 is disposed inside housing 10, in the second direction, such as Figure 2 As shown, when the battery device 100 is Figure 2 When placed in the center direction, the second direction refers to Figure 2In the Z direction. The housing 10 has a supporting wall 12, which can be the bottom wall of the housing. The second housing 11 also has a supporting wall 12. Along the second direction, the battery pack 20 is located between the pressure plate 40 and the supporting wall 12. The pressure plate 40 can be disposed within an enclosed space, dividing the enclosed space into a first space 13 and a second space (not shown in the figure) arranged along the second direction. The first space 13 is located between the pressure plate 40 and the supporting wall 12, and the battery pack 20 is disposed within the first space 13. The second space is located on the side of the pressure plate 40 away from the supporting wall 12. As an example, the end wall of the housing 211 of each battery cell 21 facing the pressure plate 40 is fixedly connected to the pressure plate 40, and the end wall of the housing 211 of each battery cell 21 facing the supporting wall 12 is fixedly connected to the supporting wall 12. The housing 211 of each battery cell 21 can be adhesively connected to the pressure plate 40 and the housing 10. By fixing the casing 211 of each battery cell 21 to the pressure plate 40 and the housing 10 respectively, it is beneficial to improve the overall structural stability of the battery pack 20, the pressure plate 40 and the housing 10, and to improve the structural strength and rigidity of the battery device 100. The first direction and the second direction intersect; as an example, the first direction and the second direction are perpendicular.

[0094] Along the second direction, the electrode terminals 212 of each battery cell 21 are exposed on the end wall of the housing 211 of the battery cell 21 facing the pressure plate 40. The pressure plate 40 is provided with a clearance area 41 to avoid each electrode terminal 212. The end wall of the housing 211 of each battery cell 21 facing the pressure plate 40 may be provided with an explosion-proof structure 215, such as an explosion-proof valve or explosion-proof plate. The clearance area 41 can avoid the explosion-proof structure 215. By providing the clearance area 41, the clearance area 41 can avoid the electrode terminals 212, which can extend into the second space, thereby facilitating the connection of multiple battery cells 21. By avoiding the explosion-proof valve through the clearance area 41, in the event of thermal runaway of the battery cell 21, it is convenient for the material inside the battery cell 21 to be ejected from the explosion-proof structure 215.

[0095] In some embodiments, such as Figure 2 and Figure 7 As shown, the pressure plate 40 is provided with a clearance hole, which is constructed as a clearance area 41. The clearance hole can avoid the electrode terminal 212 and the explosion-proof structure 215. Further, the clearance hole may include: a first clearance hole 43 and a second clearance hole 44. The first clearance hole 43 avoids the electrode terminal 212, and the second clearance hole 44 can avoid the explosion-proof structure 215.

[0096] like Figure 2 and Figure 7 As shown, the pressure plate 40 is provided with a plurality of buffer portions 42 arranged sequentially in the first direction. The buffer portions 42 can extend in the third direction. When the battery device 100 is in the third direction, Figure 2 When placed in the center direction, the third direction refers to... Figure 2 The buffer section 42 is deformable along the second direction, and each first flow channel space 30 is provided with a corresponding buffer section 42. As an example, each first flow channel space 30 is provided with one corresponding buffer section 42. As another example, each first flow channel space 30 is provided with multiple corresponding buffer sections 42. By providing a buffer section 42, the buffer section 42 can deform when the battery cell 21 expands or contracts, so that the pressure plate 40 can adapt to the expansion and contraction of the battery cell 21. This helps to improve the connection reliability of the battery cell 21, reduce the risk of the battery cell 21 disconnecting from other components, and further extend the service life of the battery device 100. In addition, when the pressure of the heat exchange medium in the first flow channel space 30 increases, the buffer section 42 can deform to adapt the first flow channel space 30 to the expansion and contraction of the battery cell 21. This helps to stabilize the flow cross-sectional area of ​​the first flow channel space 30, maintain the cooling effect, further improve the cooling uniformity of multiple battery cells 21 in the battery device 100, and further improve the performance and life of the battery device 100. At the same time, it reduces the risk of the heat exchange medium in the first flow channel space 30 leaking into the second space due to cracking of the pressure plate 40, reduces the risk of short circuit in the battery device 100, and improves the reliability of the battery device 100.

[0097] In some embodiments, a portion of the pressure plate 40 may have a first groove formed therein, thereby forming a buffer portion 42 in the area of ​​the pressure plate 40 where the first groove is provided. The first groove may be a blind groove that does not penetrate the pressure plate 40 or a through groove that penetrates the pressure plate 40. In other embodiments, a portion of the structure of the pressure plate 40 may protrude from one side of the pressure plate 40, thereby forming a buffer ridge on one side of the pressure plate 40 and a second groove on the other side of the pressure plate 40. The buffer ridge is constructed as a buffer portion 42.

[0098] Therefore, by fixing the shell 211 of each battery cell 21 to the pressure plate 40 and the housing 10 respectively, it is beneficial to improve the overall structural stability of the battery pack 20, the pressure plate 40 and the housing 10, and to improve the structural strength and rigidity of the battery device 100. Each first flow channel space 30 is provided with a corresponding buffer section 42, which provides deformation space for the first flow channel space 30 to adapt to the expansion and contraction of the battery cell 21. This helps to stabilize the flow cross-sectional area of ​​the first flow channel space 30, maintain the cooling effect, improve the cooling uniformity of multiple battery cells 21 within the battery device 100, improve the performance and lifespan of the battery device 100, and reduce the risk of leakage of the heat exchange medium within the first flow channel space 30 due to cracking of the pressure plate 40 when the pressure increases, thereby reducing the risk of short circuit in the battery device 100 and improving the reliability of the battery device 100.

[0099] According to some embodiments of this application, such as Figure 2 As shown, the portion of the pressure plate 40 excluding the buffer portion 42 and the clearance area 41 is fixedly connected to the housing 211 of the multiple battery cells 21.

[0100] The pressure plate 40 can be adhesively connected to the housings 211 of multiple battery cells 21. The buffer portion 42 is not fixedly connected to the housings 211 of the multiple battery cells 21, and the clearance area 41 is not fixedly connected to the housings 211 of the multiple battery cells 21. Except for the buffer portion 42 and the clearance area 41, the portion of the pressure plate 40 is adhesively fixed to the housings 211 of the corresponding battery cells 21. The pressure plate 40 can be fixedly connected to the housings 211 of the battery cells 21 using structural adhesive. The structural adhesive can be a high-strength structural adhesive, such as polyurea structural adhesive, which is wear-resistant, corrosion-resistant, elastic, and has strong adhesion.

[0101] In the above technical solution, the portion of the pressure plate 40 that excludes the buffer portion 42 and the clearance area 41 is fixedly connected to the housing 211 of the multiple battery cells 21, making the pressure plate 40 and the multiple battery cells 21 firmly connected. This is beneficial to improving the connection reliability between the pressure plate 40 and the multiple battery cells 21, further improving the structural strength and rigidity of the battery device 100, and facilitating the sealing of the gap between the pressure plate 40 and the multiple battery cells 21. This reduces the risk of heat exchange medium leakage in the first flow channel space 30. Furthermore, when the pressure of the heat exchange medium in the first flow channel space 30 increases, it reduces the risk of heat exchange medium in the first flow channel space 30 leaking from the clearance area 41 into the second space due to the separation of the pressure plate 40 and the battery cells 21, further reducing the short circuit risk of the battery device 100 and further improving the reliability of the battery device 100.

[0102] According to some embodiments of this application, such as Figure 2 and Figure 7 As shown, the buffer section 42 includes a buffer protrusion, which is located on the side of the pressure plate 40 away from the first flow channel space 30.

[0103] The buffer section 42 can be formed by a part of the structure of the pressure plate 40. In the second direction, a part of the structure of the pressure plate 40 protrudes from the pressure plate 40 in the direction away from the first flow channel space 30 to form a buffer ridge. The buffer ridge and the pressure plate 40 are integrally formed.

[0104] In the above technical solution, the buffer part 42 includes a buffer protrusion. The buffer protrusion is located on the side of the pressure plate 40 away from the first flow channel space 30. This helps to reduce the difficulty of forming the buffer part 42, making it easier to form the buffer part 42 on the pressure plate 40. This simplifies the structure of the pressure plate 40, thereby improving the production efficiency of the pressure plate 40. Furthermore, the pressure plate 40 can be produced with a single mold, which helps to reduce the production cost of the pressure plate 40.

[0105] According to some embodiments of this application, the buffer ridge is formed into a rectangle in the cross section of the third direction, and the third direction intersects with the first direction and the second direction respectively.

[0106] Among them, when the battery device 100 is Figure 2 When placed in the center direction, the third direction refers to... Figure 2 In the Y direction, the first, second, and third directions can be perpendicular to each other. It should be noted that when the battery device 100... Figure 2 When placed in the center direction, the buffer ridge forms a rectangle in the longitudinal section of the third direction.

[0107] In the above technical solution, the buffer ridge is formed into a rectangle in the third direction. While maintaining the structural strength of the buffer part 42, it is conducive to the deformation of the buffer part 42 and more conducive to the pressure plate 40 adapting to the expansion and contraction of the battery cell 21, so that the cross-sectional shape of the buffer part 42 in the third direction is reasonably set.

[0108] According to some embodiments of this application, such as Figure 2 As shown, the outer periphery of the pressure plate 40 is sealed and fixed to the frame 14 of the box body 10.

[0109] The frame 14 of the housing 10 can be arranged around the pressure plate 40 along its circumferential edge. The pressure plate 40 is fixedly connected to the frame 14 of the housing 10. The pressure plate 40 can be snapped and fixedly connected to the frame 14 of the housing 10, and the circumferential edge of the pressure plate 40 is sealed to the frame 14 of the housing 10. The pressure plate 40 and the frame 14 of the housing 10 can be bonded together. A sealing structure can be provided between the circumferential edge of the pressure plate 40 and the frame 14 of the housing 10. The sealing structure can be a sealing rubber ring, sealant, etc., so that the gap between the circumferential edge of the pressure plate 40 and the frame 14 of the housing 10 is sealed.

[0110] In the above technical solution, by sealing and fixing the outer periphery of the pressure plate 40 to the frame 14 of the housing 10, the circumferential edge of the pressure plate 40 and the frame 14 of the housing 10 can be sealed, improving the sealing performance of the first space 13, further reducing the risk of heat exchange medium in the first flow channel space 30 leaking into the second space, further reducing the risk of short circuit of the battery device 100, further improving the reliability of the battery device 100, and also helping to improve the connection reliability between the pressure plate 40 and the multiple battery cells 21, further improving the structural strength and rigidity of the battery device 100.

[0111] According to some embodiments of this application, the pressure plate 40 and the frame 14 are fixedly connected by a fixing connector, and the gap between the fixing connector and the pressure plate 40 is filled with sealant.

[0112] As one example, the fixing connector can be a snap-fit ​​structure, where the pressure plate 40 and the frame 14 are fixedly connected. As another example, the pressure plate 40 has threaded holes, and the fixing connector can be a bolt. The bolt can pass through the frame 14 from the outside and be fitted into the threaded holes, thus fixing the pressure plate 40 and the frame 14 together. The gap between the fixing connector and the pressure plate 40 is filled with sealant. The sealant can bond and fix the fixing connector and the pressure plate 40, reducing the risk of separation. Furthermore, the sealant can seal the gap between the fixing connector and the pressure plate 40, further improving the sealing performance of the first space 13, further reducing the risk of heat exchange medium leakage from the first space 13 into the second space, further reducing the short-circuit risk of the battery device 100, and further improving the reliability of the battery device 100. Simultaneously, it is more conducive to improving the connection reliability between the pressure plate 40 and the multiple battery cells 21, and further improving the structural strength and rigidity of the battery device 100.

[0113] In the above technical solution, the pressure plate 40 and the frame 14 are fixedly connected by a fixing connector. The fixing connector can reliably connect the pressure plate 40 and the frame 14, reducing the risk of separation between the pressure plate 40 and the frame 14. Furthermore, the gap between the fixing connector and the pressure plate 40 is filled with sealant, which can bond and fix the fixing connector and the pressure plate 40, reducing the risk of separation between the fixing connector and the pressure plate 40. The sealant can seal the gap between the fixing connector and the pressure plate 40, further improving the sealing performance of the first space 13, further reducing the risk of heat exchange medium leakage from the first space 13 into the second space, further reducing the risk of short circuit in the battery device 100, and further improving the reliability of the battery device 100. At the same time, it is more conducive to improving the connection reliability between the pressure plate 40 and the multiple battery cells 21, and further improving the structural strength and rigidity of the battery device 100.

[0114] According to some embodiments of this application, such as Figure 2 As shown, there are multiple battery packs 20, which are arranged along a third direction. The pressure plate 40 is fixedly connected to each battery cell 21 of the multiple battery packs 20. The third direction intersects with the first direction and the second direction respectively.

[0115] Among them, such as Figure 2 As shown, there are multiple battery packs 20. The number of battery packs 20 can be two, three, four, five, six, seven, etc. This application uses a six-pack of battery packs 20 as an example for illustration. The multiple battery packs 20 are arranged sequentially along a third direction. The pressure plate 40 is fixedly connected to each battery cell 21 of the multiple battery packs 20. The first direction, the second direction, and the third direction can be perpendicular to each other. Multiple battery packs 20 can have the same number of battery cells 21, that is, each battery pack 20 includes the same number of battery cells 21.

[0116] In the above technical solution, by arranging multiple battery packs 20 along a third direction, the positions of the multiple battery packs 20 can be arranged reasonably, which is conducive to simplifying the internal structure of the battery device 100 and improving the assembly efficiency of the battery device 100. Furthermore, by fixing the pressure plate 40 to each battery cell 21 of the multiple battery packs 20, it is even more conducive to improving the overall structural stability of the multiple battery packs 20, the pressure plate 40 and the housing 10, and further improving the structural strength and rigidity of the battery device 100.

[0117] According to some embodiments of this application, the buffer portion 42 extends along a third direction, and at least one buffer portion 42 is opposite to each battery pack 20 along a second direction, the third direction intersecting with the first direction and the second direction respectively.

[0118] The buffer section 42 is a strip structure, and multiple buffer sections 42 are arranged to extend along a third direction. One buffer section 42 may be opposite to each battery pack 20 along the second direction, or two buffer sections 42 may be opposite to each battery pack 20 along the second direction, or all buffer sections 42 may be opposite to each battery pack 20 along the second direction.

[0119] In the above technical solution, by having at least one buffer section 42 opposite to each battery pack 20 along the second direction, it is more conducive to maintaining the cooling effect, further improving the cooling uniformity of multiple battery cells 21 in the battery device 100, further improving the performance and lifespan of the battery device 100, and when the pressure of the heat exchange medium in the first flow channel space 30 increases, it further reduces the risk of leakage of the heat exchange medium in the first flow channel space 30 due to cracking of the pressure plate 40, further reduces the short circuit risk of the battery device 100, and further improves the reliability of the battery device 100.

[0120] According to some embodiments of this application, such as Figure 4 and Figure 5 As shown, the housing 10 may include a support beam 15. A support beam 15 can be disposed between the pressure plate 40 and the support wall 12. The support beam 15 is located within the first space 13 and extends along a second direction. A support beam 15 is disposed between any two adjacent battery packs 20, and the support beam 15 can support the adjacent battery cell 21. A connecting channel 16 can be formed within the support beam 15, connecting the heat exchange medium inlet 17 and the first space 13. Further, the support beam 15 divides the first space 13 into subspaces arranged along a third direction. Each subspace contains one battery pack 20. The connecting channel 16 connects the heat exchange medium inlet 17 and the corresponding subspace, allowing the heat exchange medium to flow into the first flow channel space 30.

[0121] According to some embodiments of this application, such as Figure 5 and Figure 8 As shown, the housing 211 includes an adjacent first sidewall 213 and a second sidewall 214. The first sidewall 213 is the sidewall with the largest area in the housing 211, and the first sidewalls 213 of the two adjacent housings 211 define the first flow channel space 30.

[0122] The battery cell 21 has a housing 211 with sidewalls, which can be annular structures. The sidewalls of the housing 211 include adjacent first sidewalls 213 and second sidewalls 214. The area of ​​the first sidewall 213 is larger than the area of ​​the second sidewall 214. The first sidewall 213 is the large surface of the battery cell 21, and the second sidewall 214 is the narrow surface of the battery cell 21. The first sidewalls 213 of multiple battery cells 21 can be arranged along a first direction. The first sidewalls 213 of the two housings 211 of any two adjacent battery cells 21 are arranged opposite to each other and spaced apart along the first direction, thereby defining a first flow channel space 30 between the two first sidewalls 213 of the two adjacent housings 211. The first flow channel space 30 is the space between the large surfaces of the two adjacent battery cells 21.

[0123] In some embodiments, the housing 211 may include two first sidewalls 213 and two second sidewalls 214, the two first sidewalls 213 of each battery cell 21 are arranged along a first direction, and the two second sidewalls 214 of each battery cell 21 are arranged along a third direction, and the two second sidewalls 214 are connected between the two first sidewalls 213, thereby forming an annular sidewall of the housing 211.

[0124] In the above technical solution, the first flow channel space 30 is defined by the first sidewall 213 between two adjacent shells 211. When the heat exchange medium flows into the first flow channel space 30, it is beneficial to increase the contact area between the shell 211 and the heat exchange medium, thereby increasing the heat exchange area between the shell 211 and the heat exchange medium, which can further improve the heat exchange efficiency, further improve the heat exchange uniformity of multiple battery cells 21, and further improve the performance and life of the battery device 100.

[0125] According to some embodiments of this application, the second sidewall 214 of each battery cell 21 and the adjacent support beam 15 can be spaced apart, thereby forming a second flow channel space between the second sidewall 214 of the battery cell 21 and the adjacent support beam 15. Along a third direction, the second sidewall 214 of the battery cell 21 at the end of the battery pack 20 can be spaced apart from the adjacent frame 14, thereby forming a second flow channel space between the second sidewall 214 of the corresponding battery cell 21 and the adjacent frame 14. The first flow channel space 30 communicates with the second flow channel space. By providing the second flow channel space, the heat exchange medium in the first flow channel space 30 can flow into the second flow channel space. The heat exchange medium flowing into the second flow channel space can contact the second sidewall 214 for heat exchange, which helps to increase the contact area between the housing 211 and the heat exchange medium, thereby further increasing the heat exchange area between the housing 211 and the heat exchange medium, further improving heat exchange efficiency, further improving the heat exchange uniformity of multiple battery cells 21, and further improving the performance and lifespan of the battery device 100.

[0126] According to some embodiments of this application, such as Figure 4 and Figure 5 As shown, the battery device 100 also includes a separator 60, which is provided between adjacent battery cells 21 in the first direction to separate a first flow channel space 30. The pressure plate 40 is located on the side of the separator 60 away from the first flow channel space 30.

[0127] The battery device 100 may further include a separating component 60. In the first direction, a separating component 60 is disposed between the first sidewalls 213 of any two adjacent battery cells 21. The separating component 60 abuts against the first sidewalls 213 of the two adjacent battery cells 21, thereby separating the first sidewalls 213 of the two adjacent battery cells 21 and creating a first flow channel space 30 between them. In the second direction, a pressure plate 40 is located on the side of the separating component 60 away from the first flow channel space 30, which can also be understood as the side of the separating component 60 away from the support wall 12.

[0128] In the above technical solution, a separator 60 is provided between adjacent battery cells 21. The separator 60 can support two adjacent battery cells 21 and reliably separate the adjacent battery cells 21. This helps to maintain the flow cross-sectional area of ​​the first flow channel space 30, better maintain the cooling effect, maintain the heat exchange efficiency, and further improve the cooling uniformity of multiple battery cells 21 in the battery device 100. Furthermore, by setting the pressure plate 40 on the side of the separator 60 away from the first flow channel space 30, the pressure plate 40 can protect the separator 60 and reduce the risk of damage to the separator 60, thereby making the arrangement of the separator 60 reasonable.

[0129] According to some embodiments of this application, the partition component 60 is fixed to the housing 10.

[0130] The partition component 60 can be fixed to an adjacent structural member of the housing 10. The partition component 60 can be adhered to the housing 10, snap-fitted to the housing 10, or bolted to the housing 10. The method of fixing the partition component 60 to the housing 10 is not specifically limited, as long as it can secure the partition component 60 to the housing 10. In some examples, the partition component 60 can be fixed to the frame 14 of the housing 10. In some examples, the partition component 60 can be fixed to the support beam 15 of the housing 10. In some examples, the partition component 60 can be fixed to both the support beam 15 and the frame 14 of the housing 10.

[0131] In the above technical solution, by fixing the separator 60 to the housing 10, it is beneficial to improve the positional stability of the separator 60 and reduce the risk of movement of the separator 60, so that the separator 60 can reliably support the two adjacent battery cells 21, which is more conducive to maintaining the flow cross-sectional area of ​​the first flow channel space 30.

[0132] According to some embodiments of this application, the separator component 60 includes:

[0133] The first sealing element 61 is used to seal the gap between the housings 211 of adjacent battery cells 21 and to seal the gap between the housings 211 and the box 10.

[0134] The first support member 62 is located on the outer periphery of the top of the housing 211 and is used to support the first seal member 61. The first seal member 61 is used to fix the first support member 62 to the housing 211 and to seal the connection between the first support member 62 and the housing 211.

[0135] Among them, such as Figure 8 As shown, the separator assembly 60 includes a first seal 61 and a first support 62. The first seal 61 can be a sealant. A gap is formed between the first sidewalls 213 of adjacent battery cells 21. At least a portion of the separator assembly 60 is located in the gap between adjacent battery cells 21 to participate in forming the first flow channel space 30. The first seal 61 can be arranged between the housings 211 of adjacent battery cells 21 and is used to seal the gap between adjacent housings 211 to improve the sealing performance of the first flow channel space 30 between adjacent battery cells 21 and reduce the risk of heat exchange medium leakage.

[0136] A gap is formed between the second sidewall 214 of the battery cell 21 and the housing 10. At least a portion of the separator 60 is located in the gap between the second sidewall 214 of the adjacent battery cell 21 and the housing 10 to participate in the formation of the second flow channel space. The first seal 61 is used to seal the gap between the housing 211 and the housing 10 to improve the sealing performance of the second flow channel space between the housing 211 and the housing 10 and reduce the risk of leakage of the heat exchange medium.

[0137] It should be noted that when the battery cell 21 is... Figure 8 When placed in the center, "top of housing 211" refers to the area above the first sidewall 213 and the second sidewall 214, or the portion of the first sidewall 213 and the second sidewall 214 near the top of housing 211.

[0138] The first support member 62 can be configured as an elastic material, such as foam or silicone, so that the first support member 62 can provide elastic support, overcome the expansion of the battery cell 21, and buffer mechanical collisions. The first support member 62 is fixed to the top of the housing 211 by the first seal 61, and at least part of the separator 60 is provided between every two adjacent battery cells 21. During the process of processing multiple battery cells 21 into a group, tooling is used to compress the battery device 100. At this time, the first support member 62131 between adjacent battery cells 21 can provide elastic support force, which is conducive to making the first flow channel space 30 between multiple battery cells 21 uniform, so that the housing 211 of the battery cell 21 and the separator 60 together define the first flow channel space 30.

[0139] In the above technical solution, by setting the first sealing element 61, the sealing performance and stability of the first flow channel space 30 located between adjacent battery cells 21 are improved, which is beneficial to improving the sealing performance and stability of the second flow channel space located between the battery cell 21 and the housing 10. It is also beneficial to reduce the risk of heat exchange medium leakage from the gap between the first support element 62 and the housing 211. By setting the first support element 62 on the housing 211, the first sealing element 61 can be set. The first support element 62 can also provide elastic support to the battery cell 21, which is beneficial to overcome the expansion of the battery cell 21 and can also play a role in buffering mechanical collisions, further improving the sealing performance and stability of the first flow channel space 30 and the second flow channel space.

[0140] According to some embodiments of this application, such as Figure 4 and Figure 5 As shown, the battery device 100 also includes a flow guiding component 70, which is disposed in the first flow channel space 30 and connected to the housing 211 to divide the first flow channel space 30 into a flow guiding path 71.

[0141] Among them, such as Figure 4 and Figure 5 As shown, the battery device 100 may also include a flow guiding component 70. The flow guiding component 70 is disposed in the first flow channel space 30 and is connected to the first side wall 213 of the adjacent housing 211. The flow guiding component 70 can divide the first flow channel space 30 to form a flow guiding path 71.

[0142] In some examples, the flow guiding component 70 can divide the first flow channel space 30 into multiple independent flow guiding paths 71. Along the flow direction perpendicular to the heat exchange medium, the cross-sectional area of ​​the flow guiding path 71 is smaller than the cross-sectional area of ​​the first flow channel space 30, which helps to increase the flow velocity of the heat exchange medium, thereby improving the heat exchange efficiency of the heat exchange medium on the battery cell 21. Furthermore, the heat exchange medium entering the first flow channel space 30 can flow into multiple independent flow guiding paths 71 to exchange heat at different locations on the battery cell 21, improving the heat exchange effect of the battery cell 21. Alternatively, in some examples, the flow guiding component 70 can divide the first flow channel space 30 into a curved and extending flow guiding path 71 to extend the flow path of the heat exchange medium in the flow channel space, which helps to improve the heat exchange effect of the heat exchange medium on the battery cell 21.

[0143] In the above technical solution, by setting the flow guiding component 70, the first flow channel space 30 is divided to form a flow guiding path 71. The flow guiding path 71 is conducive to optimizing the flow path of the heat exchange medium in the first flow channel space 30, so as to guide the heat exchange medium to flow in an orderly and fast manner, improve the flow effect of the heat exchange medium in the first flow channel space 30, and reduce the occurrence of the heat exchange medium not being able to be discharged in time after heat exchange, thereby improving the heat exchange effect between the heat exchange medium and the battery cell 21.

[0144] According to some embodiments of this application, the flow guiding component 70 is configured to participate in forming a flow guiding path 71. The flow guiding component 70 has multiple bends, one end of the flow guiding path 71 is connected to the inlet of the first flow channel space 30 and the other end is connected to the outlet of the first flow channel space 30; or,

[0145] The flow path 71 includes multiple branch flow paths 73, which can be connected in series or in parallel.

[0146] The heat exchange medium can flow into the guide path 71 from the liquid inlet of the first flow channel space 30. When the heat exchange medium flows in the guide path 71, it can exchange heat with the battery cell 21. After heat exchange, the heat exchange medium can be discharged from the first flow channel space 30 through the liquid outlet of the first flow channel space 30.

[0147] In some examples, the flow path 71 may include multiple branch flow paths 73, which may be connected in series. For example, some of the branch flow paths 73 may have different extension directions, and a bend may be provided between two branch flow paths 73 with different extension directions, so that the flow path 71 can be formed as a bent and extended flow path 71, thereby extending the flow path of the heat exchange medium in the first flow channel space 30. This is beneficial to improving the heat exchange effect of the heat exchange medium on the battery cell 21, thereby improving the temperature uniformity of the battery cell 21. One end of the flow path 71 is connected to the liquid inlet of the first flow channel space 30, and the other end is connected to the liquid outlet of the first flow channel space 30. The heat exchange medium can flow into the flow path 71 from the liquid inlet of the first flow channel space 30, and the heat exchange medium in the flow path 71 can flow out of the first flow channel space 30 through the liquid outlet of the first flow channel space 30.

[0148] In some examples, the flow path 71 may include multiple branch flow paths 73, which may include two, three, four, or other numbers. Multiple branch flow paths 73 can be arranged in parallel, which is beneficial for the flow path 71 to be evenly distributed in the first flow channel space 30. This is beneficial for the heat exchange medium to exchange heat with different positions of the battery cell 21 in the first flow channel space 30, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 21 and thus improving the temperature uniformity of the battery cell 21.

[0149] It is understandable that the specific arrangement of the flow path 71 can be determined according to actual production requirements, and no specific restrictions are made here.

[0150] As an example, such as Figure 4 and Figure 5 As shown, the flow path 71 also includes a main inlet flow path 74 and a main outlet flow path 75. The main inlet flow path 74 is connected to the liquid inlet of the first flow channel space 30. The first ends of the multiple branch flow paths 73 are respectively connected to the main inlet flow path 74, and the second ends of the multiple branch flow paths 73 are respectively connected to the main outlet flow path 75. The main outlet flow path 75 is connected to the liquid outlet of the flow channel space.

[0151] In the above technical solution, by setting a total inlet flow path 74 and a total outlet flow path 75 that are respectively connected to the two ends of the branch flow path 73, it is beneficial to make the heat exchange medium enter the first flow channel space 30 and flow in an orderly manner along the guide path 71, which is beneficial to improve the flow efficiency of the heat exchange medium, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 21.

[0152] Multiple branch flow paths 73 can be arranged sequentially along the second direction and extend along the third direction. Along the second direction, the multiple branch flow paths 73 are located between the main inlet flow path 74 and the main outlet flow path 75. The main inlet flow path 74 can extend in a straight line along the third direction. The main inlet flow path 74 is connected to the liquid inlet and is also connected to the first end of the multiple branch flow paths 73. After the heat exchange medium flows into the main inlet flow path 74 through the liquid inlet, it can be divided and flow into the multiple branch flow paths 73 respectively. The main outlet flow path 75 can extend in a straight line along the third direction. The main outlet flow path 75 is connected to the liquid outlet and is also connected to the second end of the multiple branch flow paths 73 respectively. The heat exchange medium in the multiple branch flow paths 73 can flow into the main outlet flow path 75 respectively and be discharged from the first flow space through the liquid outlet.

[0153] It is understood that the arrangement of the multiple branch flow paths 73 and the extension of the main inlet flow path 74 and the main outlet flow path 75 are merely examples of this application and should not be construed as limiting this application. The multiple branch flow paths 73 may also have other arrangements, and similarly, the main inlet flow path 74 and the main outlet flow path 75 may also have other extensions. The specific arrangement of the multiple branch flow paths 73 and the extension of the main inlet flow path 74 and the main outlet flow path 75 can be determined according to actual production requirements and are not specifically limited here.

[0154] In the above technical solution, by flexibly designing the flow path 71, it is beneficial to improve the arrangement effect of the flow path 71 in the first flow channel space 30, thereby improving the heat exchange effect of the heat exchange medium on the battery cell 21, and further improving the temperature uniformity of the battery cell 21.

[0155] According to some embodiments of this application, the flow guiding component 70 is foam and fixed to the housing 211.

[0156] Among them, such as Figure 5 As shown, the flow guiding component 70 is foam, which can be fixedly connected to the housing 211 of the adjacent battery cell 21. Further, the foam is fixedly connected to the first sidewall 213 of the housing 211 of the adjacent battery cell 21. In some embodiments, the foam can be fixed to the housing 211 by adhesive bonding, which helps to ensure the sealing of different parts of the flow guiding path 71 defined by the flow guiding component 70. In other embodiments, the foam can be fixed to the housing 211 by a structure such as clips, facilitating the installation and removal of the foam. It is understood that the method of fixing the foam to the housing 211 can also be other, and is not specifically limited here.

[0157] In the above technical solution, by configuring the flow guiding component 70 as foam, the flow guiding component 70 can have oil resistance and can be elastically supported between the shells 211 of adjacent battery cells 21. This helps to reduce the impact of the expansion of the battery cells 21 on the separation effect of the flow guiding component 70, and can also play a role in buffering and shock absorption, which helps to improve the service life of the battery device 100. At the same time, the foam is lightweight, which helps to achieve the lightweight design of the battery device 100.

[0158] According to some embodiments of this application, such as Figure 5 As shown, the flow guiding assembly 70 is fixedly connected to the adjacent housing 211.

[0159] A flow guiding component 70 is provided between two adjacent battery cells 21. Along the first direction, the two sides of the flow guiding component 70 are fixedly connected to the first sidewalls 213 of the two adjacent housings 211.

[0160] In the above technical solution, the flow guiding component 70 is fixedly connected to the adjacent housing 211, which facilitates the fixing of the flow guiding component 70 and the housing 211, reduces the assembly difficulty of the flow guiding component 70 and the housing 211, and thus helps to improve the production efficiency of the battery device 100.

[0161] According to some embodiments of this application, such as Figure 5 As shown, the battery device 100 also includes a turbulence protrusion 80, which is disposed on the flow guiding assembly 70 and extends toward the flow guiding path 71.

[0162] The battery device 100 may further include a turbulence protrusion 80 located within the flow path 71. The turbulence protrusion 80 is integrally formed with the flow guide assembly 70 and extends from the flow guide assembly 70 into the flow path 71. At least one turbulence protrusion 80 is provided; this application uses multiple turbulence protrusions 80 as an example. These multiple turbulence protrusions 80 are arranged along the direction of heat exchange medium flow. In some examples, a turbulence protrusion 80 may be provided on one sidewall of the flow path 71 along a direction perpendicular to the heat exchange medium flow, and the turbulence protrusion 80 is spaced apart from the other sidewall of the flow path 71. When the heat exchange medium flows to the location of the turbulence protrusion 80, the turbulence protrusion 80 interferes with the flow of part of the heat exchange medium, allowing part of the heat exchange medium to change its flow direction, thereby improving the turbulence effect of the heat exchange medium.

[0163] In the above technical solution, by setting turbulence protrusions 80 extending into the flow path 71, the flow direction of the heat exchange medium is changed, which is beneficial to increasing the Reynolds number of the heat exchange medium and improving the turbulence or turbulent flow effect of the heat exchange medium when it flows in the flow path 71. This is beneficial to increasing the heat transfer coefficient of the heat exchange medium and solving the problem of laminar heat transfer difference in the flow path 71, thereby improving the heat transfer effect of the heat exchange medium on the battery cell 21 and improving the temperature uniformity of the battery cell 21.

[0164] According to some embodiments of this application, such as Figure 5 As shown, there are multiple turbulence protrusions 80, which are spaced apart along the length of the guide path 71.

[0165] It should be noted that "the length direction of the flow path 71" can also be understood as the flow direction of the heat exchange medium.

[0166] Multiple turbulence protrusions 80 can be provided on one sidewall of the flow guide path 71 along the direction perpendicular to the flow of the heat exchange medium. These protrusions 80 can be evenly spaced along the length of the flow guide path 71. Alternatively, multiple turbulence protrusions 80 can be provided on one sidewall of the flow guide path 71 along the direction perpendicular to the flow of the heat exchange medium, and these protrusions 80 can be spaced according to a specific pattern. It is understood that the specific arrangement of the turbulence protrusions 80 can be determined according to actual production requirements and is not specifically limited here.

[0167] In the above technical solution, by arranging multiple turbulence protrusions 80 at intervals along the length of the flow path 71, the heat exchange medium can be continuously interfered with by the turbulence protrusions 80 during the flow process within the flow path 71. This is beneficial to improving the turbulence effect of the heat exchange medium, which in turn is beneficial to improving the heat exchange effect between the heat exchange medium and the battery cell 21. Furthermore, it is beneficial to ensure that the heat exchange medium is evenly distributed in the flow path 71, thereby improving the heat exchange uniformity of the heat exchange medium to the battery cell 21.

[0168] According to some embodiments of this application, the battery device 100 further includes a turbulence protrusion 80, which is disposed on the pressure plate 40 and extends toward the first flow channel space 30.

[0169] The battery device 100 may further include a turbulence protrusion 80. Along the second direction, the turbulence protrusion 80 may be disposed on the side of the pressure plate 40 facing the first flow channel space 30 and fixedly connected to the pressure plate 40. The turbulence protrusion 80 may be integrally formed with the pressure plate 40, or the turbulence protrusion 80 may be connected to the pressure plate 40 by means of adhesion or mechanical fixation. It is understood that the arrangement of the turbulence protrusion 80 and the pressure plate 40 can be determined according to actual production requirements, and no specific limitation is made here. The turbulence protrusion 80 extends towards the first flow channel space 30, and at least a portion of the turbulence protrusion 80 extends into the first flow channel space 30.

[0170] In the above technical solution, by setting turbulence protrusions 80 extending toward the first flow channel space 30 on the pressure plate 40, the flow direction of the heat exchange medium is changed, which is beneficial to increasing the Reynolds number of the heat exchange medium and improving the turbulence effect when the heat exchange medium flows in the first flow channel space 30. This is beneficial to increasing the heat transfer coefficient of the heat exchange medium, improving the heat exchange effect of the heat exchange medium on the battery cell 21, and thus improving the temperature uniformity of the battery cell 21.

[0171] According to some embodiments of this application, an insulating layer is formed on the surface of the pressure plate 40 facing the battery cell 21. The insulating layer can be sprayed onto the surface of the pressure plate 40 facing the battery cell 21, and the adhesion of the insulating layer is greater than 10 MPa, reducing the risk of separation between the insulating layer and the pressure plate 40. The support wall 12 can be made of a high-strength material, such as steel plate or aluminum alloy plate, enabling the support wall 12 to withstand the weight of the battery pack 20 and the pressure of the heat exchange medium. The pressure plate 40 can be made of carbon fiber composite material.

[0172] It should be noted that the battery device 100 of this application has a simple structure, which reduces manufacturing and maintenance costs, and the battery device 100 has high assembly efficiency.

[0173] According to some embodiments of this application, this application also provides an electrical device, including the battery device 100 of the above embodiments, the battery device 100 being used to store or provide electrical energy.

[0174] In the above technical solution, since the power-consuming device includes the battery device 100 of the above embodiment, it is beneficial to improve the service life and safety of the power-consuming device.

[0175] According to some embodiments of this application, such as Figures 2-7As shown, this application provides a battery device 100, including: a housing 10, a pressure plate 40, and a plurality of battery packs 20. The plurality of battery packs 20 are disposed within the housing 10 and arranged along a third direction. Each battery pack 20 includes a plurality of battery cells 21 arranged sequentially in the first direction. Each battery cell 21 includes a housing 211 and electrode terminals 212 exposed outside the housing 211. A first flow channel space 30 for circulating heat exchange medium is provided between adjacent battery cells 21 in the first direction. The pressure plate 40 is disposed within the housing 10. The pressure plate 40 and the support wall 12 of the housing 10 are opposite to and spaced apart in the second direction. The housing 211 of each battery cell 21 is fixedly connected to the pressure plate 40 and the housing 10, respectively. The pressure plate 40 has a clearance area 41 for avoiding each electrode terminal 212. The pressure plate 40 has a plurality of buffer portions 42 arranged sequentially in the first direction. Each buffer portion 42 is deformable. In the second direction, each first flow channel space 30 is provided with a corresponding buffer portion 42. The portion of the pressure plate 40, excluding the buffer portion 42 and the clearance area 41, is adhesively fixed to the housing 211 of the plurality of battery cells 21. The buffer portion 42 is defined by a portion of the pressure plate 40 protruding in a second direction away from the first flow channel space 30. The outer periphery of the pressure plate 40 is sealed and fixed to the frame 14 of the housing 10. The housing 211 includes adjacent first sidewalls 213 and second sidewalls 214, the first sidewalls 213 being the sidewalls with the largest area in the housing 211, and the adjacent first sidewalls 213 defining the first flow channel space 30. A separator assembly 60 is provided between adjacent battery cells 21 in the first direction to separate the first flow channel space 30, and the pressure plate 40 is located on the side of the separator assembly 60 away from the first flow channel space 30. The separator assembly 60 is fixed to the housing 10.

[0176] The separating assembly 60 includes: a first seal 61, which seals the gap between the housings 211 of adjacent battery cells 21 and the gap between the housing 211 and the casing 10; and a first support 62, which is disposed on the outer periphery of the top of the housing 211 and supports the first seal 61, which fixes the first support 62 to the housing 211 and seals the connection between the first support 62 and the housing 211. A flow guiding assembly 70 is disposed within the first flow channel space 30 and connected to the housing 211 to divide the first flow channel space 30 into a flow guiding path 71. The flow guiding assembly 70 is fixedly connected to adjacent housings 211. A turbulence protrusion 80 is disposed on the flow guiding assembly 70 and extends toward the flow guiding path 71. A pressure plate 40 has a turbulence protrusion 80 and extends toward the first flow channel space 30.

[0177] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0178] Other components of the battery device 100 according to the embodiments of this application, such as busbars and explosion-proof valves, as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0179] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0180] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: Box; A battery pack is disposed inside the housing. The battery pack includes a plurality of battery cells arranged sequentially in a first direction. Each battery cell includes a housing and electrode terminals exposed in the housing. A first flow channel space for circulating heat exchange medium is provided between adjacent battery cells in the first direction. A pressure plate is disposed on the housing. In the second direction, the housing of each battery cell is fixedly connected to the pressure plate and the housing respectively. The pressure plate is provided with a clearance area to avoid each electrode terminal. The pressure plate is provided with a plurality of buffer parts arranged sequentially in the first direction. Each buffer part is deformable. The first direction and the second direction intersect.

2. The battery device according to claim 1, characterized in that, The portion of the pressure plate excluding the buffer section and the clearance area is fixedly connected to the housing of multiple battery cells.

3. The battery device according to claim 1, characterized in that, The buffer section includes a buffer ridge, which is located on the side of the pressure plate away from the first flow channel space.

4. The battery device according to claim 3, characterized in that, The buffer ridge has a rectangular cross-section in the third direction, and the third direction intersects with the first direction and the second direction respectively.

5. The battery device according to claim 1, characterized in that, The outer periphery of the pressure plate is sealed and fixed to the frame of the box.

6. The battery device according to claim 5, characterized in that... The pressure plate and the frame are fixedly connected by a fixing connector, and the gap between the fixing connector and the pressure plate is filled with sealant.

7. The battery device according to claim 1, characterized in that, The battery packs are multiple, and the multiple battery packs are arranged along a third direction. The pressure plate is fixedly connected to each battery cell of the multiple battery packs. The third direction intersects with the first direction and the second direction respectively.

8. The battery device according to claim 7, characterized in that, The buffer portion extends along a third direction, and at least one of the buffer portions is opposite to each of the battery packs along the second direction, the third direction intersecting the first direction and the second direction respectively.

9. The battery device according to claim 1, characterized in that, The housing includes an adjacent first sidewall and a second sidewall, wherein the first sidewall is the sidewall with the largest area in the housing, and the first sidewalls of two adjacent housings define the first flow channel space.

10. The battery device according to claim 1, characterized in that, It also includes a separator component, which is provided between the adjacent battery cells in the first direction to separate the first flow channel space, and the pressure plate is located on the side of the separator component away from the first flow channel space.

11. The battery device according to claim 10, characterized in that, The partition assembly is fixed to the housing.

12. The battery device according to claim 10, characterized in that, The separation component includes: A first seal is used to seal the gap between the housings of adjacent battery cells and to seal the gap between the housing and the enclosure. A first support member is disposed on the outer periphery of the top of the housing and is used to support the first sealing member. The first sealing member is used to fix the first support member to the housing and to seal the connection between the first support member and the housing.

13. The battery device according to any one of claims 1-12, characterized in that, It also includes a flow guiding component, which is disposed within the first flow channel space and connected to the housing, for dividing the first flow channel space to form a flow guiding path.

14. The battery device according to any one of claims 1-12, characterized in that, It also includes a turbulence protrusion, which is disposed on the pressure plate and extends toward the first flow channel space.

15. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-14, the battery device being used to store or provide electrical energy.

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