Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device. The battery device comprises a box body and a battery monomer, the box body comprises a wall part, a containing cavity is defined by the wall part, and an inlet and an outlet communicated with the containing cavity are formed in the wall part. And the battery monomers are arranged in the accommodating cavities. Wherein the wall part comprises a first side wall, a cooling flow channel is arranged in the first side wall, the cooling flow channel comprises first flow channels and second flow channels which are alternately distributed in the same direction, a plurality of first communicating holes are formed in the wall face, facing the containing cavity, of the first side wall, the first flow channels communicate with the inlet, and the second flow channels communicate with the first communicating holes; a heat exchange medium entering from the inlet can enter the second flow channel from the first flow channel and enter the containing cavity through the first communicating hole. The heat exchange capacity of the battery device can be improved, and the reliability of the battery device is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The battery device of the related art is greatly affected by temperature, which affects the reliability of the battery device. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which can meet the temperature regulation requirements of the battery monomer and ensure the reliability of the battery device.

[0005] In the first aspect, the present application provides a battery device, comprising a box body and a battery monomer. The box body comprises a wall part, which encloses a containing cavity. The wall part is provided with an inlet and an outlet, and the outlet is in communication with the containing cavity. The battery monomer is placed in the containing cavity. The wall part comprises a first side wall, and the first side wall is provided with a cooling flow channel. The cooling flow channel comprises first flow channels and second flow channels which are alternately distributed in the same direction. The wall surface of the first side wall facing the containing cavity is provided with a plurality of first communication holes. The first flow channels are in communication with the inlet, and the second flow channels are in communication with the first communication holes. The heat exchange medium entering from the inlet can enter the second flow channels from the first flow channels, and then enter the containing cavity through the first communication holes.

[0006] In the technical scheme of the present application, the first side wall is provided with a cooling flow channel, and the cooling flow channel comprises first flow channels and second flow channels which are alternately distributed in the same direction. The heat exchange medium can enter the second flow channels from the first flow channels, and then enter the containing cavity through the first communication holes. The heat exchange medium and the battery monomer in the containing cavity are in heat exchange, which ensures the cooling or heating of the battery monomer, meets the temperature regulation requirements of the battery monomer, and ensures the reliability of the battery device.

[0007] In some embodiments, adjacent first flow channels and second flow channels are in communication according to a preset communication rule, and the flow rate ratio A of the heat exchange medium flowing out of any two first communication holes satisfies: 0.93≤A≤1.

[0008] The adjacent first flow channel and the second flow channel are communicated according to a preset communication rule, and by setting a reasonable communication rule, the flow of the heat exchange medium in the first flow channel entering the second flow channel communicated therewith is reasonably distributed, when the heat exchange medium flows into the containing cavity from the first communication hole, the flow ratio A of the heat exchange medium flowing out of any two first communication holes satisfies: 0.93≤A≤1, the temperature and temperature difference of each region of the battery monomer in the containing cavity are effectively controlled in a reasonable temperature range, the problem of uneven heat exchange of the battery device is improved, and the reliability of the battery device is ensured.

[0009] In some embodiments, a shunt plate is arranged between the adjacent first flow channel and the second flow channel, a plurality of shunt holes are arranged on the shunt plate, and the shunt holes communicate the first flow channel and the second flow channel. On the one hand, it is convenient to realize the communication between the adjacent first flow channel and the second flow channel; on the other hand, it is convenient to set the communication rule.

[0010] In some embodiments, along the extension direction of the cooling flow channel, and the cooling flow channel is directed from one end communicated with the inlet to the other end, the area of the shunt hole on the same shunt plate shows an increasing trend, and the area change of the communication between the first flow channel and the second flow channel compensates for the flow loss in the process, effectively controls the temperature and temperature difference of each region of the battery monomer in the containing cavity in a reasonable temperature range, improves the problem of uneven heat exchange of the battery device, and ensures the reliability of the battery device.

[0011] In some embodiments, along the extension direction of the cooling flow channel, and the cooling flow channel is directed from one end communicated with the inlet to the other end, the spacing of the shunt hole on the same shunt plate shows a decreasing trend, and the area change of the communication between the first flow channel and the second flow channel compensates for the flow loss in the process, effectively controls the temperature and temperature difference of each region of the battery monomer in the containing cavity in a reasonable temperature range, improves the problem of uneven heat exchange of the battery device, and ensures the reliability of the battery device.

[0012] In some embodiments, along the extension direction of the cooling flow channel, and the cooling flow channel is directed from one end communicated with the inlet to the other end, the number of the first flow channel communicated with each second flow channel of the cooling flow channel shows an increasing trend, and the area change of the communication between the first flow channel and the second flow channel compensates for the flow loss in the process, effectively controls the temperature and temperature difference of each region of the battery monomer in the containing cavity in a reasonable temperature range, improves the problem of uneven heat exchange of the battery device, and ensures the reliability of the battery device.

[0013] In some embodiments, along the extension direction of the cooling channel, the cooling channel points from one end connected to the inlet to the other end, and the cooling channel has multiple diversion areas. The connection rules of adjacent first channels and second channels in each diversion area are different, which effectively controls the temperature and temperature difference of each area of ​​the battery cell in the accommodating cavity within a reasonable temperature range, improves the problem of uneven heat exchange in the battery device, and ensures the reliability of the battery device.

[0014] In some embodiments, within the same diversion region, the number of first flow channels connected to each second flow channel of the cooling channel is the same; the diversion holes on the diversion plate between the connected first and second flow channels have the same area; and the spacing between each two adjacent diversion holes on the partition plate between the connected first and second flow channels is the same. This simplifies the connectivity rules and effectively controls the temperature and temperature difference of the battery cells within the same diversion region within a reasonable temperature range, improving the uneven heat exchange problem in the battery device and ensuring the reliability of the battery device.

[0015] In some embodiments, within each diversion region, the number of first flow channels connected to each second flow channel of the cooling channel varies, the area of ​​the diversion holes on the diversion plate between the connected first and second flow channels varies, and the spacing between adjacent diversion holes on the partition plate between the connected first and second flow channels is uniform. This simplifies the connectivity rules and effectively controls the temperature and temperature difference of the battery cells within different diversion regions within a reasonable temperature range, improving the uneven heat exchange problem in the battery device and ensuring the reliability of the battery device.

[0016] In some embodiments, the number of shunt regions is n, where n is an integer greater than or equal to 2. The first shunt region is located close to the inlet, and the nth shunt region is located away from the inlet. Within the first shunt region, the number of first flow channels connected to each second flow channel is B1. Within the nth shunt region, the number of first flow channels connected to each second flow channel is B2. B1 is less than B2. The temperature and temperature difference of the battery cells within the first shunt region and the nth shunt region are effectively controlled within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device and ensuring the reliability of the battery device.

[0017] In some embodiments, the area of ​​the diverter holes on the diverter plate between the first and second connected flow channels in the first diverter region is C1; the area of ​​the diverter holes on the diverter plate between the first and second connected flow channels in the nth diverter region is C2, where C1 is smaller than C2. This effectively controls the temperature and temperature difference of the battery cells in the first and nth diverter regions within a reasonable temperature range, improves the uneven heat exchange problem in the battery device, and ensures the reliability of the battery device.

[0018] In some embodiments, the wall portion further includes a second sidewall, which is arranged alternately with the first sidewall. The second sidewall is provided with third and fourth flow channels that are alternately distributed and connected along the same direction. The wall surface of the second sidewall facing the accommodating cavity is provided with a plurality of second connecting holes, the third flow channels are connected to the outlet, and the fourth flow channels are connected to the second connecting holes. On the one hand, by arranging the structure of the second sidewall to be consistent with that of the first sidewall, the number of molds can be reduced, effectively reducing costs. On the other hand, by arranging the second sidewall alternately with the first sidewall, it is ensured that the heat exchange medium flowing from the first connecting holes into the accommodating cavity can enter the second sidewall through the second connecting holes and flow out of the outlet, thereby reducing the probability of the heat exchange medium being retained in the accommodating cavity.

[0019] In some embodiments, there are multiple first side walls with inlets, and the number of first side walls with first connecting holes is the same, so as to facilitate controlling the temperature and temperature difference of each area of ​​the battery cell in the accommodating cavity within a reasonable temperature range, improve the problem of uneven heat exchange in the battery device, and ensure the reliability of the battery device.

[0020] In some embodiments, there are multiple battery cells, which are spaced apart and formed with a first channel, which is connected to the first communication hole and the second communication hole. This allows the heat exchange medium in the accommodating cavity to contact more battery cells, facilitates controlling the temperature and temperature difference of each area of ​​the battery cells in the accommodating cavity within a reasonable temperature range, improves the problem of uneven heat exchange in the battery device, and ensures the reliability of the battery device.

[0021] In some embodiments, the first connecting holes and the diverter holes are provided in a one-to-one correspondence, so that the heat exchange medium in the first flow channel can flow directly from the first connecting hole into the accommodating cavity after flowing from the diverter hole into the second flow channel, thereby reducing the amount of heat exchange medium retained in the second flow channel and reducing waste of the heat exchange medium.

[0022] In some embodiments, the housing further includes a connecting tube, which is clamped between two adjacent battery cells and communicates with the first connecting hole and the second connecting hole. This arrangement allows the heat exchange medium flowing out of the first connecting hole to be directed, allowing the heat exchange medium to flow directionally between two adjacent battery cells, ensuring heat exchange requirements between the battery cells. Furthermore, this arrangement allows for a wider variety of heat exchange media to be selected, and different types of heat exchange media will not affect the performance of the battery cells, thereby ensuring the reliability of the battery device.

[0023] On the other hand, the present application also provides an electrical device, including the above-mentioned battery device, which is used to store or provide electrical energy.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0026] Figure 1 is a structural schematic diagram of a vehicle provided in one embodiment of the present application;

[0027] Figure 2 is a structural diagram of a battery device provided in one embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of a battery device provided in another embodiment of the present application;

[0029] Figure 4 This is a schematic diagram of the partial structure of a box provided in one embodiment of the present application;

[0030] Figure 5 This is a schematic structural diagram of the first diversion area provided in one embodiment of the present application;

[0031] Figure 6 is a structural schematic diagram of the second diversion area provided in one embodiment of the present application;

[0032] Figure 7 is a structural schematic diagram of the third diversion area provided in one embodiment of the present application;

[0033] Figure 8 is a structural schematic diagram of the fourth diversion area provided in one embodiment of the present application;

[0034] Figure 9 It is a structural schematic diagram of the fifth diversion area provided in one embodiment of the present application.

[0035] The following are the descriptions of the reference numerals:

[0036] 1. Vehicle; 10. Battery device; 11. Controller; 12. Motor;

[0037] 20. Battery cells;

[0038] 30, box body; 31, wall portion; 301, first side wall; 302, second side wall; 303, first communicating hole; 304, second communicating hole; 30a, first box body portion; 30b, second box body portion;

[0039] 41. First flow channel; 42. Second flow channel; 43. Diverter plate; 43a. First diverter plate; 43b. Second diverter plate; 43c. Third diverter plate; 43d. Fourth diverter plate; 44. Diverter hole;

[0040] 51. Inlet pipe; 52. Outlet pipe;

[0041] 60. Diversion area; 601. First diversion area; 602. Second diversion area; 603. Third diversion area; 604. Fourth diversion area; 605. Fifth diversion area. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0045] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0046] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0048] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing.

[0049] The battery device in the related art has large heat generation, poor heat exchange capacity, and poor reliability of the battery device.

[0050] Based on the above consideration, in order to solve the problems of large heat generation, poor heat exchange capacity and poor reliability of the battery device, after in-depth research, a battery device is involved, which comprises a box body and a battery monomer. The box body comprises a wall part, which is enclosed to form an accommodating cavity, and the wall part is provided with an inlet and an outlet, and the outlet is communicated with the accommodating cavity. The battery monomer is placed in the accommodating cavity. Among them, the wall part includes a first side wall, a cooling flow channel is arranged in the first side wall, the cooling flow channel includes first flow channel and second flow channel which are alternately distributed in the same direction, a plurality of first communication holes are arranged on the wall surface of the first side wall facing the accommodating cavity, the first flow channel is communicated with the inlet, and the second flow channel is communicated with the first communication hole. The heat exchange medium entering from the inlet can enter the second flow channel from the first flow channel, and enter the accommodating cavity through the first communication hole. In order to realize the heat exchange between the heat exchange medium and the battery monomer, improve the heat exchange capacity of the battery device, and ensure the reliability of the battery device.

[0051] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0052] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical devices described above, but can also be applied to all electrical equipment including those using battery devices. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0053] like Figure 1 , which is a schematic structural diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is provided inside the vehicle 1. The battery device 10 may be provided at the bottom, head or tail of the vehicle 1. The battery device 10 may be used to power the vehicle 1. For example, the battery device 10 may serve as an operating power source for the vehicle 1. The vehicle 1 may further include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to power the motor 12, for example, for starting, navigating and operating power requirements of the vehicle 1 during driving.

[0054] In some embodiments of the present application, the battery device 10 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0055] like Figure 1 and Figure 2As shown, the present application provides a battery device 10 on one hand. It includes a box body 30 and a battery cell 20. The box body 30 includes a wall portion 31, and the wall portion 31 encloses a accommodating cavity. The wall portion 31 is provided with an inlet and an outlet, and the outlet is connected to the accommodating cavity. The battery cell 20 is placed in the accommodating cavity. Among them, the wall portion 31 includes a first side wall 301, and a cooling flow channel is provided in the first side wall 301. The cooling flow channel includes a first flow channel 41 and a second flow channel 42 alternately distributed in the same direction. The wall surface of the first side wall 301 facing the accommodating cavity is provided with a plurality of first connecting holes 303. The first flow channel 41 is connected to the inlet, and the second flow channel 42 is connected to the first connecting hole 303. The heat exchange medium entering from the inlet can enter the second flow channel 42 from the first flow channel 41 and enter the accommodating cavity through the first connecting hole 303.

[0056] The housing 30 may be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as rectangular parallelepiped, cylinder, or sphere, and the present embodiment is not limited thereto. The housing 30 may be made of an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin, and the present embodiment is not limited thereto.

[0057] The housing 30 is used to house the battery cells 20 and can have various structures. In some embodiments, the housing 30 can include a first housing portion 30a and a second housing portion 30b. The first housing portion 30a and the second housing portion 30b overlap each other and together define a storage space for the battery cells 20. The second housing portion 30b can be a hollow structure with one end open. The first housing portion 30a is a plate-like structure, and the first housing portion 30a overlaps the open side of the second housing portion 30b to form the housing 30 with a storage space. The first housing portion 30a and the second housing portion 30b can also each be a hollow structure with one end open. The open side of the first housing portion 30a overlaps the open side of the second housing portion 30b to form the housing 30 with a storage space. Of course, the first housing portion 30a and the second housing portion 30b can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0058] In order to improve the sealing performance after the first box body portion 30a and the second box body portion 30b are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body portion 30a and the second box body portion 30b.

[0059] Assuming that the first box portion 30 a covers the top of the second box portion 30 b , the first box portion 30 a can also be referred to as an upper box cover, and the second box portion 30 b can also be referred to as a lower box 30 .

[0060] The wall portion 31 can be a local structure of at least one of the first box portion 30a and the second box portion 30b. Of course, it can also be a structure arranged in the internal space of at least one of the first box portion 30a and the second box portion 30b, as long as it can ensure the accommodation and heat exchange requirements of the battery cell 20.

[0061] The battery cell 20 can be one or more. If there are multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to multiple battery cells 20 being connected both in series and in parallel. Of course, multiple battery cells 20 can also be connected in series, in parallel, or in a hybrid connection to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a hybrid connection to form a whole.

[0062] The battery cells 20 may include lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the present embodiment does not limit this. The battery cells may be cylindrical, flat, rectangular, or other shapes, and the present embodiment does not limit this. The battery cells 20 are generally divided into three types based on the packaging method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the present embodiment does not limit this. However, for the sake of simplicity, the following embodiments are all described using square battery cells as an example.

[0063] The shape of the accommodating cavity can be square, rectangular, trapezoidal, circular or triangular, etc.

[0064] The areas of the inlet and outlet can be selected to be the same, or they can be different.

[0065] The outlet may be directly connected to the accommodating chamber, or may be connected to the accommodating chamber through a connecting piece.

[0066] The number of outlets can be one or more.

[0067] like Figure 3-Figure 9 As shown, the location of the outlet on the wall portion 31 is not critical, as long as it is connected to the accommodating cavity and the heat exchange medium in the accommodating cavity can be discharged from the outlet.

[0068] Optionally, the wall portion 31 may include one first side wall 301 , or may include multiple first side walls 301 .

[0069] The first side wall 301 may be, but is not limited to, a rectangular hollow plate structure or a square hollow plate structure. The first side wall 301 may be a rectangular hollow plate structure extending along the first direction.

[0070] The first flow channel 41 and the second flow channel 42 are alternately arranged along the same direction. The first flow channel 41 can be arranged first, the second flow channel 42 can be arranged second, and the first flow channel 41 can be arranged alternately in this manner. Alternatively, the second flow channel 42 can be arranged first, the first flow channel 41 can be arranged second, and the second flow channel 42 can be arranged alternately in this manner.

[0071] The connection rule includes but is not limited to at least one of the number of connections between the first flow channel 41 and the second flow channel 42 , the connection method between the first flow channel 41 and the second flow channel 42 , and the connection area between the first flow channel 41 and the second flow channel 42 .

[0072] The heat exchange medium may be a gaseous heat exchange medium or a liquid heat exchange medium. The liquid heat exchange medium may be water, oil, an organic solvent, etc. The gaseous heat exchange medium may be air, steam, etc.

[0073] This embodiment provides a battery device 10 with cooling channels disposed within the first sidewall 301. The cooling channels include first channels 41 and second channels 42 that are alternately distributed along the same direction. A heat exchange medium can enter the first channels 41 from the inlet, then flow through the first channels 41 into the second channels 42, and finally enter the accommodating cavity through the first connecting hole 303, thereby enabling heat exchange between the heat exchange medium and the battery cells 20 within the accommodating cavity. This improves the heat exchange capability of the battery device 10 and ensures its reliability.

[0074] Optionally, the extending direction of the first flow channel 41 is consistent with the extending direction of the first side wall 301 , and the extending direction of the second flow channel 42 is consistent with the extending direction of the first side wall 301 .

[0075] Optionally, the plurality of first communication holes 303 may be, but are not limited to, arranged in a uniform array on the wall surface of the first side wall 301 facing the accommodating cavity.

[0076] Optionally, the spacing between the plurality of first communication holes 303 may match the length of the battery cell 20 . An exemplary spacing between the plurality of first communication holes 303 may be equal to the length of the battery cell 20 or the cross-sectional diameter of the battery cell 20 .

[0077] In some embodiments, adjacent first flow channels and second flow channels are connected according to a preset connection rule, and the flow ratio A of the heat exchange medium flowing out of any two first communication holes 303 satisfies: 0.93≤A≤1.

[0078] The flow rate ratio A of the heat exchange medium flowing out of any two first connecting holes 303 can be any value between 0.93 and 1, and can be 0.95-0.98. The flow rate ratio A of the heat exchange medium flowing out of any two first connecting holes 303 can be 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, or 1.

[0079] In a battery device 10 provided by one embodiment of the present application, adjacent first flow channels 41 and second flow channels 42 are connected according to a preset connection rule. By setting a reasonable connection rule, the flow rate of the heat exchange medium in the first flow channel 41 entering the second flow channel 42 connected thereto is reasonably distributed. When the heat exchange medium flows into the accommodating cavity from the first connecting hole 303, the flow rate ratio A of the heat exchange medium flowing out of any two first connecting holes 303 is ensured to satisfy the following: 0.93≤A≤1. This effectively controls the temperature and temperature difference of each area of ​​the battery cell 20 in the accommodating cavity within a reasonable temperature range, improves the problem of uneven heat exchange in the battery device 10, and ensures the reliability of the battery device 10.

[0080] In some embodiments, a diverter plate 43 is provided between the adjacent first flow channel 41 and the second flow channel 42 . The diverter plate 43 is provided with a plurality of diverter holes 44 . The diverter holes 44 connect the first flow channel 41 and the second flow channel 42 .

[0081] The plurality of diversion holes 44 may be distributed along the extending direction of the first flow channel 41 and the second flow channel 42 .

[0082] The diverter plate 43 can be configured as a rectangular plate structure, or alternatively, other polygonal structures. Optionally, the material of the diverter plate 43 can be the same as or different from the material of the first side wall 301. The material of the diverter plate 43 can be, but is not limited to, alloy materials such as aluminum alloy and iron alloy, polymer materials such as polycarbonate and polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0083] It is understood that the diverter plate 43 can be optionally connected to the inner wall surface of the first side wall 301. The connection can be either a fixed connection or a detachable connection. The fixed connection can be fixed by welding or bonding. The detachable connection can be detachably connected by fastening with fasteners such as bolts, or by partially extending one into the other for a snap-fit ​​connection.

[0084] Optionally, the diverter plate 43 and the first side wall 301 can be integrally formed or separately provided and welded. A one-piece structure is optional. On the one hand, there is no need to use an additional connection process to connect the diverter plate 43 and the first side wall 301, simplifying the manufacturing process. Furthermore, compared to connecting the diverter plate 43 and the first side wall 301 through an additional connection process, the one-piece structure provides a higher connection security between the diverter plate 43 and the first side wall 301.

[0085] The shape of the diverter hole 44 can be, but is not limited to, rectangular, square, circular, or triangular, etc. The shape of the diverter hole 44 can be rectangular.

[0086] Optionally, the plurality of diversion holes 44 may be arranged in one row or in multiple rows.

[0087] A battery device 10 provided in one embodiment of the present application, by providing a diverter plate 43 between adjacent first flow channels 41 and second flow channels 42, and providing a plurality of diverter holes 44 on the diverter plate 43, facilitates the connection between the adjacent first flow channels 41 and second flow channels 42 on the one hand; and facilitates the setting of connection rules on the other hand.

[0088] In some embodiments, along the extension direction of the cooling flow channel, and from one end connected to the inlet to the other end of the cooling flow channel, the area of ​​the diverter holes 44 on the same diverter plate 43 tends to increase.

[0089] The increasing trend mentioned above and below may include, but is not limited to, situations where the trend continues to increase, remains constant and then increases, or increases and then remains constant. Of course, it is understood that a slight decrease in one location, while the remaining portions meet the aforementioned conditions of maintaining constant and then increasing, or increasing and then remaining constant, can still be considered an increasing trend. In other words, as long as there is no continuous decrease, the trend can be considered an increasing trend.

[0090] For example, along the extension direction of the cooling channel, and with the cooling channel pointing from one end connected to the inlet to the other end, on the same diverter plate 43, the area of ​​the diverter hole 44 is first set to 5mm*5mm, then the area of ​​the diverter hole 44 is set to 3mm*5mm, then the area of ​​the diverter hole 44 is set to 5mm*5mm, and finally the area of ​​the diverter hole 44 is set to 5mm*7mm. Of course, the above is merely an example for a better understanding of the present invention. This is an optional example and can be adjusted according to design needs to ensure that the area of ​​the diverter hole 44 on the same diverter plate 43 shows an increasing trend.

[0091] In a battery device 10 provided in one embodiment of the application, the flow rate of the heat exchange medium in the cooling channel near the inlet is relatively high, while the flow rate of the heat exchange medium in the cooling channel far from the inlet is relatively low. Along the extension direction of the cooling channel, which points from one end connected to the inlet to the other, the area of ​​the diverter holes 44 on the same diverter plate 43 is set to increase. The area of ​​the connection between the first channel and the second channel is changed to compensate for flow loss during the process. This effectively controls the temperature and temperature difference of each area of ​​the battery cell 20 in the accommodating cavity within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0092] In some embodiments, along the extension direction of the cooling flow channel, and from one end connected to the inlet to the other end of the cooling flow channel, the spacing between the diverter holes 44 on the same diverter plate 43 tends to decrease.

[0093] The spacing between the diverter holes 44 can be understood as the minimum distance between adjacent diverter holes 44 along the extending direction of the diverter plate 43 .

[0094] A decreasing trend may include, but is not limited to, situations where the number decreases continuously, remains constant before decreasing, or decreases before remaining constant. Of course, it is understood that a slight increase in one location, while the remaining locations meet the aforementioned conditions of first remaining constant before decreasing, or decreasing before remaining constant, can still be considered a decreasing trend. In other words, as long as there is no continuous increase, it can be considered a decreasing trend.

[0095] For example, along the extension direction of the cooling channel, and with the cooling channel pointing from one end connected to the inlet to the other end, the spacing between the diverter holes 44 on the same diverter plate 43 is first set to 7 mm, then to 5 mm, and finally to 3 mm. Of course, the above is merely an example provided to better understand the present invention. This is an optional example and can be adjusted according to design needs. The spacing between the diverter holes 44 on the same diverter plate 43 can be reduced.

[0096] In a battery device 10 provided by one embodiment of the present application, the flow rate of the heat exchange medium in the cooling channel near the inlet is larger, and the flow rate of the heat exchange medium in the cooling channel away from the inlet is smaller. Along the extension direction of the cooling channel and the cooling channel pointing from one end connected to the inlet to the other end, the spacing between the diverter holes 44 on the same diverter plate 43 is set to show a decreasing trend, and the flow loss during the movement is compensated by changing the area connected by the first channel 41 and the second channel 42, thereby effectively controlling the temperature and temperature difference of each area of ​​the battery cell 20 in the accommodating cavity within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0097] In some embodiments, along the extension direction of the cooling channel, and from one end connected to the inlet to the other end of the cooling channel, the number of first channels 41 connected to each second channel 42 of the cooling channel tends to increase.

[0098] Illustratively, along the extension direction of the cooling channel, and with the cooling channel pointing from one end connected to the inlet to the other end, the number of first channels 41 connected to each second channel 42 of the cooling channel is first set to one and then to two.

[0099] In a battery device 10 provided by one embodiment of the present application, the flow rate of the heat exchange medium in the cooling channel near the inlet is larger, and the flow rate of the heat exchange medium in the cooling channel away from the inlet is smaller. Along the extension direction of the cooling channel and the cooling channel points from one end connected to the inlet to the other end, the number of first channels 41 connected to each second channel 42 of the cooling channel is set to increase, and the flow loss during the movement is compensated by changing the area of ​​communication between the first channel 41 and the second channel 42, thereby effectively controlling the temperature and temperature difference of each area of ​​the battery cell 20 in the accommodating cavity within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0100] In some embodiments, along the extension direction of the cooling channel, and the cooling channel points from one end connected to the inlet to the other end, the cooling channel has multiple diversion areas 60, and the connection rules of adjacent first channels 41 and second channels 42 in each diversion area 60 are different.

[0101] Optionally, the cooling channel may have, but is not limited to, two diversion areas 60 , three diversion areas 60 , four diversion areas 60 or five diversion areas 60 . Of course, the cooling channel may also have more diversion areas 60 .

[0102] Connectivity rules being different can be understood as at least one of the connectivity rules being different, that is, the connectivity rules being different. Of course, connectivity rules being different can also mean that multiple connectivity rules are different, or each connectivity rule is different.

[0103] Optionally, the areas of the diverter holes 44 on the same diverter plate 43 may be different along the extension direction of the cooling channel, and the cooling channel may point from one end connected to the inlet to the other end; the spacing of the diverter holes 44 on the same diverter plate 43 may be different along the extension direction of the cooling channel, and the cooling channel may point from one end connected to the inlet to the other end; or the number of first flow channels 41 connected to each second flow channel 42 of the cooling flow channel may be different along the extension direction of the cooling channel, and the cooling channel may point from one end connected to the inlet to the other end, etc.

[0104] In a battery device 10 provided by one embodiment of the present application, the flow rate of the heat exchange medium in the cooling channel near the inlet is larger, and the flow rate of the heat exchange medium in the cooling channel away from the inlet is smaller. Along the extension direction of the cooling channel and the cooling channel points from one end connected to the inlet to the other end, by having multiple diversion areas 60 in the cooling channel, the connection rules of the adjacent first flow channels 41 and the second flow channels 42 of each diversion area 60 are set to be different. Different connection rules can be used to compensate for the flow loss during the movement, effectively control the temperature and temperature difference of each area of ​​the battery cell 20 in the accommodating cavity within a reasonable temperature range, improve the problem of uneven heat exchange in the battery device 10, and ensure the reliability of the battery device 10.

[0105] In some embodiments, within the same diversion area 60, the number of first flow channels 41 connected to each second flow channel 42 of the cooling flow channel is the same; the area of ​​each diversion hole 44 on the diversion plate 43 between the connected first flow channels 41 and the second flow channels 42 is the same; the spacing between each adjacent two diversion holes 44 on the partition plate between the connected first flow channels 41 and the second flow channels 42 is the same.

[0106] In a battery device 10 provided in one embodiment of the present application, within the same diversion region 60, the distance between each first flow channel 41 and the inlet is consistent, so the flow rate of the heat exchange medium flowing from the inlet into each first flow channel 41 is consistent. This is achieved by setting the number of first flow channels 41 connected to each second flow channel 42 of the cooling channel to be the same; setting the area of ​​each diversion hole 44 on the diversion plate 43 between the connected first flow channels 41 and the second flow channels 42 to be the same; and setting the spacing between each two adjacent diversion holes 44 on the partition plate between the connected first flow channels 41 and the second flow channels 42 to be the same. This simplifies the connection rules and facilitates molding. It also effectively controls the temperature and temperature difference of the battery cells 20 within the same diversion region 60 within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0107] In some embodiments, in each of the diversion areas 60, there is a difference in the number of the first flow channels 41 connected to each of the second flow channels 42 of the cooling flow channels, and there is a difference in the area of ​​the diversion holes 44 on the diversion plate 43 between the connected first flow channels 41 and the second flow channels 42; the spacing between each adjacent diversion hole 44 on the partition plate between the connected first flow channels 41 and the second flow channels 42 is the same.

[0108] In a battery device 10 provided in one embodiment of the present application, the number of first flow channels 41 communicating with each second flow channel 42 is easily adjustable, and the relationship between the number of first flow channels 41 communicating with each second flow channel 42 and the flow rate of the heat exchange medium flowing from the first flow channel 41 to the second flow channel 42 is easily calculated. Furthermore, the area of ​​the diverter holes 44 on the diverter plate 43 between the first flow channel 41 communicating with the second flow channel 42 and the second flow channel 42 is easily adjustable, and the relationship between the area of ​​the diverter holes 44 on the diverter plate 43 between the first flow channel 41 communicating with the second flow channel 42 and the flow rate of the heat exchange medium flowing from the first flow channel 41 to the second flow channel 42 is easily calculated. Therefore, the spacing between the first flow channels 41 connecting the multiple diversion regions 60 with the second flow channels 42 and the diversion holes 44 on the diversion plate 43 between the second flow channels 42 is set to be the same. By adjusting the number of first flow channels 41 connected to each second flow channel 42 and the area of ​​the diversion holes 44 on the diversion plate 43 between the first flow channels 41 connected to the second flow channels 42, this simplifies the connection rules and effectively controls the temperature and temperature difference of the battery cells 20 in different diversion regions 60 within a reasonable temperature range, thereby improving the uneven heat exchange problem of the battery device 10 and ensuring the reliability of the battery device 10.

[0109] In some embodiments, the number of diversion regions 60 is n, where n is an integer greater than or equal to 2. The first diversion region 60 is located near the inlet, and the nth diversion region 60 is located farther from the inlet. Within the first diversion region 60, the number of first flow channels 41 communicating with each second flow channel 42 is B1. Within the nth diversion region 60, the number of first flow channels 41 communicating with each second flow channel 42 is B2. B1 is less than B2.

[0110] The value of n can be 2, 3, 4 or a larger number.

[0111] In a battery device 10 provided by one embodiment of the present application, due to flow loss of the heat exchange medium during its flow, the flow rate of the heat exchange medium in the nth diversion area 60 arranged away from the inlet is less than the flow rate of the heat exchange medium in the first diversion area 60 arranged close to the inlet. By setting B1 to be less than B2, the flow loss can be compensated, and the temperature and temperature difference of the battery cells 20 in the first diversion area 60 and the nth diversion area 60 can be effectively controlled within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0112] For example, the number B1 of the first flow channels 41 communicating with each second flow channel 42 in the first diversion region 60 can be set to 1, and the number B2 of the first flow channels 41 communicating with each second flow channel 42 in the nth diversion region 60 can be set to 2.

[0113] In some embodiments, in the first diversion region 60, the area of ​​the diversion hole 44 on the diversion plate 43 between the connected first flow channel 41 and the second flow channel 42 is C1; in the nth diversion region 60, the area of ​​the diversion hole 44 on the diversion plate 43 between the connected first flow channel 41 and the second flow channel 42 is C2, where C1 is smaller than C2.

[0114] For example, in the first diversion region 60, the area C1 of the diversion hole 44 on the diversion plate 43 between the first flow channel 41 and the second flow channel 42 can be 5mm*5mm; in the nth diversion region 60, the area C2 of the diversion hole 44 on the diversion plate 43 between the first flow channel 41 and the second flow channel 42 can be 5mm*7mm. Of course, in some embodiments, in the first diversion region 60, the area C1 of the diversion hole 44 on the diversion plate 43 between the first flow channel 41 and the second flow channel 42 can be 3mm*5mm; in the nth diversion region 60, the area C2 of the diversion hole 44 on the diversion plate 43 between the first flow channel 41 and the second flow channel 42 can be 5mm*7mm, which can ensure that the numerical range requirements of the flow ratio A are met.

[0115] In a battery device 10 provided by one embodiment of the present application, due to flow loss during the flow of the heat exchange medium, the flow rate of the heat exchange medium in the nth diversion area 60 arranged away from the inlet is less than the flow rate of the heat exchange medium in the first diversion area 60 arranged near the inlet. By setting C1 to be less than C2, the flow loss can be compensated, and the temperature and temperature difference of the battery cells 20 in the first diversion area 60 and the nth diversion area 60 can be effectively controlled within a reasonable temperature range, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0116] Continue reading Figure 3 and Figure 4 In some embodiments, the wall portion 31 further includes a second side wall 302, which is alternately arranged with the first side wall 301. The second side wall 302 is provided with a third flow channel and a fourth flow channel that are alternately distributed and connected along the same direction. The second side wall 302 is provided with a plurality of second connecting holes 304 on the wall surface facing the accommodating cavity. The third flow channel is connected to the outlet, and the fourth flow channel is connected to the second connecting hole 304.

[0117] The second side wall 302 and the first side wall 301 are arranged alternately. The second side wall 302 can be arranged first, then the first side wall 301, and then the second side wall 302, and they are arranged alternately in this way; or the first side wall 301 can be arranged first, then the second side wall 302, and then the first side wall 301, and they are arranged alternately in this way.

[0118] The wall portion 31 may include one second side wall 302 , or may include a plurality of second side walls 302 .

[0119] The second side wall 302 may be, but is not limited to, a rectangular hollow plate structure or a square hollow plate structure. The second side wall 302 may be a rectangular hollow plate structure extending along the first direction.

[0120] It can be understood that the third flow channel and the fourth flow channel are arranged alternately along the same direction. The third flow channel can be set first, then the fourth flow channel, and then the third flow channel, and they are arranged alternately in this way; or the fourth flow channel can be set first, then the third flow channel, and then the fourth flow channel, and they are arranged alternately in this way.

[0121] Optionally, the extension direction of the third flow channel is consistent with the extension direction of the second side wall 302 , and the extension direction of the fourth flow channel is consistent with the extension direction of the second side wall 302 .

[0122] Optionally, the plurality of second communication holes 304 may be, but are not limited to, arranged in a uniform array on the wall surface of the second side wall 302 facing the accommodating cavity.

[0123] It is understood that one of the third and fourth flow channels is connected to the outlet, and the other is connected to the second connecting hole 304. Alternatively, the third flow channel may be connected to the outlet, and the fourth flow channel may be connected to the first connecting hole 303. Alternatively, the fourth flow channel may be connected to the outlet, and the third flow channel may be connected to the second connecting hole 304. However, for simplicity, the following embodiments are described using the example of the third flow channel being connected to the outlet, and the fourth flow channel being connected to the second connecting hole 304.

[0124] The battery device 10 provided in one embodiment of the application, on the one hand, by setting the structure of the second side wall 302 to be consistent with the structure of the first side wall 301, the number of molds can be reduced and the cost can be effectively reduced; on the other hand, by alternating the second side wall 302 and the first side wall 301, it is ensured that the heat exchange medium flowing from the first connecting hole 303 into the accommodating cavity can enter the second side wall 302 from the second connecting hole 304 and flow out from the outlet, thereby reducing the probability of the heat exchange medium being retained in the accommodating cavity.

[0125] In some embodiments, a plurality of first side walls 301 provided with the inlet are provided, and the number of wall surfaces of the first side walls 301 provided with the first communicating holes 303 is the same.

[0126] The number of wall surfaces of the first side walls 301 provided with the first connecting holes 303 is the same, that is, both side walls of the multiple first side walls 301 facing the accommodating cavity are provided with the first connecting holes 303; or, the first connecting hole 303 is provided on one side wall of the multiple first side walls 301 facing the accommodating cavity.

[0127] In a battery device 10 provided in one embodiment of the present application, the number of the wall surfaces of the first side wall 301 provided with the first connecting holes 303 is the same. This allows the temperature and temperature difference of each area of ​​the battery cell 20 in the accommodating cavity to be controlled within a reasonable temperature range while maintaining a consistent flow rate at the inlet, thereby improving the problem of uneven heat exchange in the battery device 10 and ensuring the reliability of the battery device 10.

[0128] In some embodiments, there are multiple battery cells 20 , and the multiple battery cells 20 are spaced apart and form a first channel, which is connected to the first communication hole 303 and the second communication hole 304 .

[0129] The first channel may be formed between every two adjacent battery cells 20 , or more than two battery cells 20 may be grouped together, with the first channel formed on one end of two adjacent groups of battery cells 20 facing each other.

[0130] In a battery device 10 provided in one embodiment of the present application, a first channel is provided to communicate with the first connecting hole 303 and the second connecting hole 304, so that the heat exchange medium in the accommodating cavity can contact more battery cells 20, thereby facilitating the control of the temperature and temperature difference of each area of ​​the battery cells 20 in the accommodating cavity within a reasonable temperature range.

[0131] Optionally, the first channel may be a physical channel or a virtual channel.

[0132] Optionally, a first channel may be provided between each adjacent battery cell 20 , or a first channel may be provided between some adjacent battery cells 20 .

[0133] The first channel is in communication with the first communicating hole 303 and the second communicating hole 304 . The first channel may be in communication with the first communicating hole 303 directly or indirectly through other structures.

[0134] In some embodiments, the first communicating holes 303 and the diverter holes 44 are disposed in a one-to-one correspondence.

[0135] In a battery device 10 provided in one embodiment of the present application, by arranging the first connecting hole 303 and the diverter hole 44 in a one-to-one correspondence, the heat exchange medium in the first flow channel 41 can flow directly from the first connecting hole 303 into the accommodating cavity after flowing into the second flow channel 42 from the diverter hole 44, thereby reducing the amount of heat exchange medium retained in the second flow channel 42 and minimizing waste of heat exchange medium.

[0136] In some embodiments, the box body 30 further includes a connecting pipe, which is clamped between two adjacent battery cells 20 and is connected to the first connecting hole 303 and the second connecting hole 304 .

[0137] The battery device 10 provided in one embodiment of the present application, through the above-mentioned arrangement, realizes the drainage effect of the heat exchange medium flowing out of the first connecting hole 303, so that the heat exchange medium can flow in a direction between two adjacent battery cells 20, ensuring the heat exchange requirements between the battery cells 20. At the same time, the above-mentioned arrangement makes it possible to choose from more types of heat exchange media, and different types of heat exchange media will not affect the performance of the battery cells 20, thereby ensuring the reliability of the battery device.

[0138] In some embodiments, the box body 30 further includes an inlet pipe 51 , on which the inlet is disposed. The box body 30 further includes an outlet pipe 52 , on which the outlet is disposed.

[0139] In some embodiments, the box body 30 further includes a collecting plate inlet pipe 51 connected to the cooling channel through the collecting plate, and the outlet is connected to the cooling channel through the collecting plate.

[0140] See attached Figure 3-Figure 9 A battery device provided by one embodiment of the present application includes a housing 30 and a battery cell 20. The housing 30 includes a wall portion 31, which encloses a receiving cavity. The wall portion 31 is provided with an inlet and an outlet, and the outlet is connected to the receiving cavity. The battery cell 20 is placed in the receiving cavity. The wall portion 31 includes a first side wall 301 and a second side wall 302, and the second side wall 302 is arranged alternately with the first side wall 301. A cooling flow channel is provided in the first side wall 301, and the cooling flow channel includes a first flow channel 41 and a second flow channel 42 alternately distributed in the same direction. A plurality of first connecting holes 303 are provided on the wall surface of the first side wall 301 facing the receiving cavity. The first flow channel 41 is connected to the inlet, and the second flow channel 42 is connected to the first connecting hole 303. The heat exchange medium entering from the inlet can enter the second flow channel 42 from the first flow channel 41 and enter the receiving cavity through the first connecting hole 303; the flow ratio A of the heat exchange medium flowing out of any two first connecting holes 303 satisfies: A=1.

[0141] Each cooling channel has a diverter plate 43 inside, dividing the cooling channel into three first flow channels 41 and two second flow channels 42. The three first flow channels 41 and the two second flow channels 42 are arranged alternately in sequence. The three first flow channels 41 are first flow channel 41a, first flow channel 41b, and first flow channel 41c, respectively. The two second flow channels 42 are second flow channel 42a and second flow channel 42b, respectively. A first diverter plate 43a is arranged between the first flow channel 41a and the second flow channel 42a. A second diverter plate 43b is arranged between the second flow channel 42a and the first flow channel 41b. A third diverter plate 43c is arranged between the first flow channel 41b and the second flow channel 42b. A fourth diverter plate 43d is arranged between the second flow channel 42b and the first flow channel 41c.

[0142] The cooling flow channel has five flow division regions 60 along the extension direction of the cooling flow channel and from one end communicating with the inlet to the other end.

[0143] In the first flow division region 601, the second flow channel 42a and the first flow channel 41b communicate, that is, the second flow division plate 43b is provided with a flow division hole 44, and the heat exchange medium can flow from the inlet into the first flow channel 41b and flow to the second flow channel 42a through the flow division hole 44 on the second flow division plate 43b. The area of the flow division hole 44 provided on the second flow division plate 43b is 5mm*5mm. The number of flow division holes 44 provided on the second flow division plate 43b is five.

[0144] In the first flow division region 601, the first flow channel 41b and the second flow channel 42b communicate, that is, the third flow division plate 43c is provided with a flow division hole 44, and the heat exchange medium can flow from the inlet into the first flow channel 41b and flow to the second flow channel 42b through the flow division hole 44 on the third flow division plate 43c. The area of the flow division hole 44 provided on the third flow division plate 43c is 5mm*5mm. The number of flow division holes 44 provided on the third flow division plate 43c is five.

[0145] In the second flow division region 602, the first flow channel 41a and the second flow channel 42a communicate, that is, the first flow division plate 43a is provided with a flow division hole 44, and the heat exchange medium can flow from the inlet into the first flow channel 41a and flow to the second flow channel 42a through the flow division hole 44 on the first flow division plate 43a. The area of the flow division hole 44 provided on the first flow division plate 43a is 3mm*5mm. The number of flow division holes 44 provided on the first flow division plate 43a is six.

[0146] In the second flow division region 602, the first flow channel 41b and the second flow channel 42b communicate, that is, the third flow division plate 43c is provided with a flow division hole 44, and the heat exchange medium can flow from the inlet into the first flow channel 41b and flow to the second flow channel 42b through the flow division hole 44 on the third flow division plate 43c. The area of the flow division hole 44 provided on the third flow division plate 43c is 3mm*5mm. The number of flow division holes 44 provided on the third flow division plate 43c is six.

[0147] In the third flow division region 603, the first flow channel 41a and the second flow channel 42a communicate, that is, the first flow division plate 43a is provided with a flow division hole 44, and the heat exchange medium can flow from the inlet into the first flow channel 41a and flow to the second flow channel 42a through the flow division hole 44 on the first flow division plate 43a. The area of the flow division hole 44 provided on the first flow division plate 43a is 5mm*5mm. The number of flow division holes 44 provided on the first flow division plate 43a is five.

[0148] In the third diverter region 603, the first flow channel 41b and the second flow channel 42b are connected. Specifically, the third diverter plate 43c is provided with diverter holes 44. Heat exchange medium can flow from the inlet into the first flow channel 41b and then into the second flow channel 42b through the diverter holes 44 in the third diverter plate 43c. The diverter holes 44 in the third diverter plate 43c have an area of ​​5 mm x 5 mm. There are five diverter holes 44 in the third diverter plate 43c.

[0149] In the fourth diverter region 604, the first flow channel 41a and the second flow channel 42a are connected. Specifically, the first diverter plate 43a is provided with diverter holes 44. Heat exchange medium can flow from the inlet into the first flow channel 41a and then into the second flow channel 42a through the diverter holes 44 in the first diverter plate 43a. The diverter holes 44 provided in the first diverter plate 43a have an area of ​​5 mm by 7 mm. There are six diverter holes 44 provided in the first diverter plate 43a.

[0150] In the fourth diverter region 604, the first flow channel 41b and the second flow channel 42b are connected. Specifically, the third diverter plate 43c is provided with diverter holes 44. Heat exchange medium can flow from the inlet into the first flow channel 41b and then into the second flow channel 42b through the diverter holes 44 in the third diverter plate 43c. The area of ​​the diverter holes 44 in the third diverter plate 43c is 5 mm by 7 mm. There are six diverter holes 44 in the third diverter plate 43c.

[0151] In the fifth diverter region 605, the first flow channel 41a and the second flow channel 42a are connected. Specifically, diverter holes 44 are provided on the first diverter plate 43a. Heat exchange medium can flow from the inlet into the first flow channel 41a and then into the second flow channel 42a through the diverter holes 44 on the first diverter plate 43a. The diverter holes 44 provided on the first diverter plate 43a have an area of ​​5 mm by 7 mm. There are twelve diverter holes 44 provided on the first diverter plate 43a.

[0152] In the fifth diverter region 605, the second flow channel 42a is connected to the first flow channel 41b. Specifically, diverter holes 44 are provided on the second diverter plate 43b. Heat exchange medium can flow from the inlet into the first flow channel 41b and then into the second flow channel 42a through the diverter holes 44 on the second diverter plate 43b. The diverter holes 44 on the second diverter plate 43b have an area of ​​5 mm by 7 mm. There are twelve diverter holes 44 on the second diverter plate 43b.

[0153] In the fifth diverter region 605, the first flow channel 41b and the second flow channel 42b are connected. Specifically, the third diverter plate 43c is provided with diverter holes 44. Heat exchange medium can flow from the inlet into the first flow channel 41b and then into the second flow channel 42b through the diverter holes 44 in the third diverter plate 43c. The diverter holes 44 in the third diverter plate 43c have an area of ​​5 mm by 7 mm. There are twelve diverter holes 44 in the third diverter plate 43c.

[0154] In the fifth diverter region 605, the second flow channel 42b is connected to the first flow channel 41c. Specifically, the fourth diverter plate 43d is provided with diverter holes 44. Heat exchange medium can flow from the inlet into the first flow channel 41c and then into the second flow channel 42b through the diverter holes 44 in the fourth diverter plate 43d. The diverter holes 44 in the fourth diverter plate 43d have an area of ​​5 mm by 7 mm. There are twelve diverter holes 44 in the fourth diverter plate 43d.

[0155] There are multiple battery cells 20, spaced apart and formed with a first channel. The first channel communicates with the first connecting hole 303 and the second connecting hole. The first connecting holes 303 correspond one-to-one with the diverter holes 44. The second sidewall 302 is provided with third and fourth flow channels, alternatingly distributed and interconnected along the same direction. The wall of the second sidewall 302 facing the accommodating cavity is provided with multiple second connecting holes 304. The third flow channels communicate with the outlet, and the fourth flow channels communicate with the second connecting holes 304.

[0156] On the other hand, the present application also provides an electrical device, including the above-mentioned battery device 10, and the battery device 10 is used to store or provide electrical energy.

[0157] The battery device 10 provided in one embodiment of the present application has the advantages of improving the heat exchange capability of the battery device 10 and ensuring the reliability of the battery device 10 due to the aforementioned battery device 10 .

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body includes a wall portion, the wall portion encloses a receiving cavity, the wall portion is provided with an inlet and an outlet, and the outlet is communicated with the receiving cavity; A battery cell is placed in the accommodating cavity; In which, the wall portion includes a first side wall, a cooling flow channel is provided in the first side wall, the cooling flow channel includes a first flow channel and a second flow channel alternately distributed in the same direction, and a plurality of first connecting holes are provided on the wall surface of the first side wall facing the accommodating cavity, the first flow channel is connected to the inlet, and the second flow channel is connected to the first connecting hole. The heat exchange medium entering from the inlet can enter the second flow channel from the first flow channel and enter the accommodating cavity through the first connecting hole.

2. The battery device according to claim 1, wherein: The adjacent first flow channels and the second flow channels are connected according to a preset connection rule, and the flow ratio A of the heat exchange medium flowing out of any two first communication holes satisfies: 0.93≤A≤1.

3. The battery device according to claim 1 or 2, characterized in that A diverter plate is provided between the first flow channel and the second flow channel which are adjacent to each other. A plurality of diverter holes are provided on the diverter plate. The diverter holes connect the first flow channel and the second flow channel.

4. The battery device according to claim 3, characterized in that Along the extension direction of the cooling flow channel, and from one end connected with the inlet to the other end of the cooling flow channel, the area of ​​the diverter holes on the same diverter plate tends to increase.

5. The battery device according to claim 3 or 4, characterized in that: Along the extension direction of the cooling flow channel, and from one end connected with the inlet to the other end of the cooling flow channel, the spacing between the diverter holes on the same diverter plate tends to decrease.

6. The battery device according to any one of claims 1 to 5, characterized in that: Along the extension direction of the cooling flow channel, and from one end connected with the inlet to the other end of the cooling flow channel, the number of the first flow channels connected with each second flow channel of the cooling flow channel tends to increase.

7. The battery device according to claim 2, characterized in that Along the extension direction of the cooling channel, and the cooling channel points from one end connected to the inlet to the other end, the cooling channel has multiple diversion areas, and the connection rules of the adjacent first channel and the second channel in each diversion area are different.

8. The battery device according to claim 3, wherein: In the same diversion area, the number of first flow channels connected to the second flow channels of the cooling flow channels is the same; the area of ​​each diversion hole on the diversion plate between the connected first flow channels and the second flow channels is the same; the spacing between each adjacent two diversion holes on the partition plate between the connected first flow channels and the second flow channels is the same.

9. The battery device according to claim 8, characterized in that In each of the diversion areas, there is a difference in the number of the first flow channels connected to each of the second flow channels of the cooling flow channels, and there is a difference in the area of ​​the diversion holes on the diversion plate between the connected first flow channels and the second flow channels; the spacing between each adjacent diversion hole on the partition plate between the connected first flow channels and the second flow channels is the same.

10. The battery device according to claim 9, characterized in that The number of the diversion areas is n, where n is an integer greater than or equal to 2, the first diversion area is located close to the inlet, and the nth diversion area is located away from the inlet; Among them, in the first diversion area, the number of the first flow channels connected to each second flow channel is B1; in the nth diversion area, the number of the first flow channels connected to each second flow channel is B2, wherein B1 is smaller than B2.

11. The battery device according to claim 10, characterized in that In the first diversion area, the area of ​​the diversion hole on the diversion plate between the first flow channel and the second flow channel is C1; in the nth diversion area, the area of ​​the diversion hole on the diversion plate between the first flow channel and the second flow channel is C2, wherein C1 is smaller than C2.

12. The battery device according to any one of claims 1 to 11, characterized in that: The wall portion also includes a second side wall, which is alternately arranged with the first side wall, and the second side wall is provided with a third flow channel and a fourth flow channel that are alternately distributed and connected in the same direction. The second side wall is provided with a plurality of second connecting holes on the wall surface facing the accommodating cavity, the third flow channel is connected to the outlet, and the fourth flow channel is connected to the second connecting hole.

13. The battery device according to any one of claims 1 to 12, characterized in that: There are a plurality of first side walls provided with the inlet, and the wall surfaces of the first side walls provided with the first communicating holes are the same in number.

14. The battery device according to claim 12, wherein: There are a plurality of battery cells, and the battery cells are spaced apart and form a first channel. The first channel is communicated with the first communicating hole and the second communicating hole.

15. The battery device according to claim 3, characterized in that The first communicating holes are arranged in a one-to-one correspondence with the diverter holes.

16. The battery device according to claim 12, wherein: The box body further includes a communicating pipe, which is clamped between two adjacent battery cells and communicates with the first communicating hole and the second communicating hole.

17. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 16, wherein the battery device is used to store or provide electrical energy.

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