Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment. The battery device comprises a battery monomer and a battery box, the battery box comprises a box body, the box body comprises a frame and a bottom plate arranged on one side of the frame, the frame and the bottom plate define a containing space, and the battery monomers are contained in the containing space; and the cooling plate is arranged in the accommodating space, a cooling flow channel for a cooling medium to circulate is defined between the cooling plate and the bottom plate, and the cooling plate supports the battery monomers. The bottom wall of the box body and the cooling plate jointly define the cooling flow channel, so that two layers of liquid cooling plates do not need to be used for limiting the cooling flow channel, namely, one layer of liquid cooling plate can be omitted, the thickness of the liquid cooling plate is reduced, the weight of the liquid cooling plate is reduced, and the weight of the battery device can be further reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] A battery pack typically consists of a battery casing and individual battery cells, with the individual cells housed within the casing. In related technologies, the heat dissipation solution for battery packs generally involves placing a highly thermally conductive liquid cooling plate at the bottom of the battery casing, with the individual battery cells resting on the liquid cooling plate. The liquid cooling plate contains cooling channels for the flow of cooling medium, thereby dissipating heat from the individual battery cells.

[0003] However, the liquid cooling plates in related technologies are thick and heavy, resulting in a heavy battery device. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical appliance that can reduce the weight of the battery device.

[0005] In a first aspect, this application provides a battery device, which includes a battery cell and a battery case;

[0006] The battery box includes:

[0007] The housing includes a frame and a base plate disposed on one side of the frame, the frame and the base plate defining an accommodating space, and the battery cell is housed within the accommodating space; and

[0008] A cooling plate is disposed within the accommodating space, and a cooling channel for the flow of cooling medium is defined between the cooling plate and the base plate, and the cooling plate supports the battery cell.

[0009] The battery device provided in this application embodiment defines a cooling channel between the cooling plate and the base plate. This allows heat generated by the battery cells to be transferred via the cooling plate to the cooling medium within the cooling channel. The cooling medium then carries away the heat during its flow, effectively dissipating heat from the battery cells. By using the base plate and cooling plate together to define the cooling channel, two layers of cooling plates are eliminated, thus reducing the thickness and weight of the cooling plates and consequently, the weight of the battery device.

[0010] In one embodiment, the base plate is provided with channel grooves for forming the cooling channels;

[0011] The cooling plates are stacked on the base plate and cover the flow channel groove, so that the cooling flow channel is defined between the cooling plates and the base plate.

[0012] By stacking cooling plates on a base plate, with the cooling plates and base plate overlapping each other, it is easy to define a cooling flow channel between the cooling plates and the base plate.

[0013] In one embodiment, the material density of the cooling plate is greater than that of the base plate.

[0014] By using a lower-density base plate, the weight of the battery box can be further reduced, thereby further reducing the weight of the battery assembly. Meanwhile, the cooling plate has a relatively high material density, allowing it to reliably support the individual battery cells.

[0015] In one embodiment, the cooling plate is made of metal, and the base plate is made of non-metallic material.

[0016] Metal materials have good thermal conductivity, so cooling plates made of metal can quickly and effectively transfer the heat generated by the battery cells to the cooling medium in the cooling channels.

[0017] In one embodiment, the frame and the base plate are integrally formed.

[0018] The frame and base plate are integrally molded, eliminating the need to mold the frame and base plate separately and then connect them, thus facilitating the processing and assembly of the box.

[0019] In one embodiment, the battery box further includes:

[0020] A first baffle dam is disposed on the base plate, and the first baffle dam surrounds the cooling channel along the circumferential contour of the cooling channel; and

[0021] An adhesive layer is provided, wherein the cooling plate is bonded to the base plate by means of the adhesive layer, and the adhesive layer is located outside the enclosure area of ​​the first adhesive barrier embankment.

[0022] By setting a first adhesive dam on the base plate, which is located around the cooling channel, the adhesive layer can be blocked outside the area enclosed by the first adhesive dam. In other words, the adhesive layer is blocked outside the cooling channel by the first adhesive dam, thereby minimizing the risk of the adhesive layer entering the cooling channel and affecting the effective cross-sectional area of ​​the cooling circuit.

[0023] The battery box also includes a second rubber dam disposed on the base plate;

[0024] The second rubber-blocking dam surrounds the cooling channel along its circumferential contour; the second rubber-blocking dam is located on the side of the first rubber-blocking dam closer to the cooling channel;

[0025] The second adhesive-blocking dam is spaced apart from the first adhesive-blocking dam to define the adhesive overflow trough.

[0026] When an adhesive layer is installed outside the area enclosed by the first adhesive dam, if the amount of adhesive is too large, the adhesive layer can overflow over the first adhesive dam into the overflow groove between the first and second adhesive dams. On the one hand, this can reduce the possibility of an excessively thick adhesive layer between the cooling plate and the base plate; on the other hand, if too much adhesive layer overflows into the overflow groove, it can be further blocked outside the cooling channel by the second adhesive dam, thereby further preventing the adhesive layer from entering the cooling channel and affecting the effective cross-sectional area of ​​the cooling circuit.

[0027] In one embodiment, the height by which the second rubber-blocking dam protrudes from the bottom wall is greater than the height by which the first rubber-blocking dam protrudes from the bottom plate.

[0028] Even if the amount of adhesive in the adhesive layer is too large and overflows into the overflow tank beyond the first adhesive barrier, the second adhesive barrier can still effectively block the adhesive in the overflow tank from the outside of the cooling channel.

[0029] In one embodiment, the cooling plate is sealed against the end of the second baffle dam facing away from the base plate.

[0030] By abutting the end of the cooling plate against the bottom plate of the second adhesive dam, the cooling plate can be limited, that is, the distance between the cooling plate and the bottom plate can be limited, thereby limiting the thickness of the adhesive layer between the cooling plate and the bottom plate, and thus effectively controlling the thickness of the adhesive layer.

[0031] The cooling plate is tightly attached to the end of the second rubber dam facing away from the bottom plate to achieve a sealed fit between the two. This allows the cooling channel to be enclosed within the area enclosed by the second rubber dam and isolates the adhesive layer outside the area enclosed by the second rubber dam. This more effectively prevents the adhesive layer from entering the cooling channel and affecting the effective cross-sectional area of ​​the cooling circuit.

[0032] In one embodiment, a drain groove is further defined between the cooling plate and the base plate, and the base plate is provided with a drain hole communicating with the drain groove, the drain groove being located outside the cooling channel.

[0033] When the connection between the cooling plate and the base plate is unreliable, causing the cooling channel to be poorly sealed, the cooling medium will leak along the gap between the cooling plate and the base plate towards the frame. In the process, it will pass through the drain groove outside the cooling channel, enter the drain groove, and then be discharged to the outside of the battery box through the drain hole. This reduces the risk of the cooling medium leaking from between the cooling plate and the frame to the side of the cooling plate closer to the battery cell.

[0034] In one embodiment, the battery box further includes a first liquid-retaining rib disposed on the base plate;

[0035] The first liquid-blocking rib is located between the cooling channel and the frame, and the end of the first liquid-blocking rib facing away from the bottom plate is sealed and abutted against the cooling plate.

[0036] The drainage channel is located between the first baffle rib and the frame.

[0037] By having the end of the first liquid-blocking rib facing away from the bottom plate abut against and fit snugly against the cooling plate, a sealed fit is achieved between the two ends of the first liquid-blocking rib and the cooling plate. This effectively isolates the cooling channel from the drain trough, thus enhancing the sealing performance of the cooling channel. Even if there is leakage of cooling medium in the cooling channel, the first liquid-blocking rib can, to a certain extent, block the cooling medium, reducing the risk of the cooling medium flowing across the gap between the first liquid-blocking rib and the cooling plate towards the frame.

[0038] In one embodiment, the battery box further includes a second liquid-retaining rib disposed on the bottom plate; the second liquid-retaining rib is located between the first liquid-retaining rib and the frame, and one end of the second liquid-retaining rib facing away from the bottom plate is sealed and abuts against the cooling plate;

[0039] The second baffle rib is spaced apart from the first baffle rib to define the drainage trough;

[0040] An adhesive portion is provided between the second liquid-blocking rib and the frame for bonding the base plate and the cooling plate.

[0041] By having the end of the second liquid-blocking rib facing away from the bottom plate abut against and fit against the cooling plate, a sealed fit can be achieved between the end of the second liquid-blocking rib facing away from the bottom plate and the cooling plate. After the cooling medium enters the drain trough, the sealed fit between the end of the second liquid-blocking rib facing away from the bottom plate and the cooling plate can further prevent the cooling medium from flowing towards the frame, thereby further reducing the amount of cooling medium entering the side of the cooling plate closer to the battery cell from between the cooling plate and the frame.

[0042] The bonding portion between the second baffle and the frame further bonds the base plate and the cooling plate, thereby enhancing the connection reliability between the base plate and the cooling plate and improving the sealing of the cooling channel. Moreover, after the cooling medium enters the drain trough, the bonding portion between the second baffle and the frame can prevent the cooling medium from flowing towards the frame, thereby further reducing the risk of the cooling medium entering the side of the cooling plate closer to the battery cell from between the cooling plate and the frame.

[0043] In one embodiment, a reinforcing rib structure is provided on the side of the base plate facing away from the cooling plate;

[0044] The reinforcing rib structure includes multiple reinforcing ribs spaced apart along a first direction and multiple reinforcing ribs spaced apart along a second direction;

[0045] Wherein, the first direction intersects with the second direction.

[0046] Multiple reinforcing ribs spaced apart along the first direction and multiple reinforcing ribs spaced apart along the second direction intersect each other to form a grid-like reinforcing rib structure, which can effectively enhance the load-bearing strength of the base plate.

[0047] Secondly, this application provides an electrical device including the aforementioned battery device, which is used to provide electrical energy to the electrical device.

[0048] In the aforementioned electrical equipment, the battery cells of the battery device can be mounted on a cooling plate. Since a cooling channel is defined between the cooling plate and the base plate, the heat generated by the battery cells can be transferred through the cooling plate to the cooling medium within the cooling channel. The cooling medium then carries away the heat during its flow, thus dissipating heat from the battery cells. Therefore, the battery box provided in this embodiment utilizes the base plate and the cooling plate to define the cooling channel, eliminating the need for two layers of cooling plates. This reduces the thickness and weight of the cooling plates, thereby reducing the weight of the battery device.

[0049] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0051] Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application.

[0052] Figure 2 This is an exploded structural diagram of a battery according to some embodiments of this application.

[0053] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application.

[0054] Figure 4 This is a schematic diagram of the connection structure between the battery box body and the cooling plate in some embodiments of this application.

[0055] Figure 5 for Figure 4An exploded view of the connection structure between the housing and the cooling plate.

[0056] Figure 6 for Figure 5 The top view of the box shown.

[0057] Figure 7 for Figure 4 The side view of the connection structure between the box and the cooling plate shown.

[0058] Figure 8 for Figure 7 The diagram shows a cross-sectional view (AA) of the connection structure between the housing and the cooling plate.

[0059] Figure 9 for Figure 4 A top view of the connection structure between the housing and the cooling plate shown.

[0060] Figure 10 for Figure 9 The diagram shows a BB cross-sectional view of the connection structure between the housing and the liquid cooling plate.

[0061] Figure 11 for Figure 10 A magnified view of a portion of region A in the middle.

[0062] Figure 12 for Figure 4 A schematic diagram of the connection structure between the box and the cooling plate from another perspective.

[0063] The reference numerals in the detailed embodiments are as follows:

[0064] XX', First direction; YY', Second direction;

[0065] 1000 - Vehicles;

[0066] 1100 - Battery assembly; 1110 - Battery box; 1111 - Box body; 1112 - Top cover; 1120 - Individual battery cell; 1121 - End cap; 1121a - Electrode terminal; 1122 - Housing; 1123 - Cell assembly;

[0067] 1200-Controller;

[0068] 1300-motor;

[0069] 100. Side wall;

[0070] 200. Base plate; 210. Cooling channel; 211. Channel section; 212. Connecting section;

[0071] 300. Liquid cooling plate;

[0072] 400. Adhesive layer;

[0073] 500. The first retaining wall;

[0074] 600. Second retaining wall; 601. Glue overflow trough;

[0075] 710. First baffle rib; 720. Second baffle rib; 701. Drain hole; 702. Drain groove;

[0076] 800. Reinforcing ribs. Detailed Implementation

[0077] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0079] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0080] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0081] In the description of the embodiments 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, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0082] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0083] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0084] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0085] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0086] A battery pack typically consists of a battery casing and individual battery cells, with the individual cells housed within the casing. In related technologies, the heat dissipation solution for battery packs generally involves placing a highly thermally conductive liquid cooling plate at the bottom of the casing, with the individual battery cells resting on the liquid cooling plate. The liquid cooling plate in a typical battery pack comprises two opposing and fixedly connected plates: an upper liquid cooling plate and a lower liquid cooling plate. A cooling channel is defined between the upper and lower liquid cooling plates, allowing the cooling medium to circulate and dissipate heat from the individual battery cells. This type of liquid cooling plate requires two layers, resulting in significant thickness and weight, thus contributing to the overall weight of the battery pack.

[0087] Based on the above considerations, in order to solve the problem that the heat dissipation scheme used in battery devices in related technologies results in a large weight of the battery device, this application designs a battery device in which the battery box uses the bottom plate of the box and the cooling plate to define the cooling flow channel, thereby eliminating the need to use two layers of liquid cooling plates to define the cooling flow channel, thus saving one layer of liquid cooling plate, reducing the thickness of the liquid cooling plate, reducing the weight of the liquid cooling plate, and thus reducing the weight of the battery device.

[0088] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. Specifically, the electrical equipment can be, but is not limited to, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. By using the battery device disclosed in this application to form the power system of the electrical equipment, the weight of the battery device can be reduced.

[0089] For ease of explanation, the following embodiments will use a vehicle 1000 as an example of an electrical device from some embodiments of this application.

[0090] Please refer to Figure 1 , Figure 1 The diagram illustrates the structure of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is installed inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 controls the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0091] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0092] Please refer to Figure 2 , Figure 2This is an exploded view of a battery provided in some embodiments of this application. The battery device 1100 includes a battery case 1110 and battery cells 1120. The battery cells 1120 are housed within the battery case 1110. The battery case 1110 provides housing space for the battery cells 1120, and the battery case can adopt various structures. In some embodiments, the battery case 1110 may include a top cover 1112 and a housing 1111, the top cover 1112 and the housing 1111 covering each other, and the top cover 1112 and the housing 1111 together define a receiving cavity for housing the battery cells 1120. The housing 1111 can be a hollow structure with one open end, and the top cover 1112 can be a plate-like structure. The top cover 1112 closes onto the open side of the housing 1111 so that the top cover 1112 and the housing 1111 together define the receiving cavity. Alternatively, both the top cover 1112 and the housing 1111 can be hollow structures with one open end, and the open side of the top cover 1112 closes onto the open side of the housing 1111. Of course, the battery box 1110 formed by the top cover 1112 and the housing 1111 can be of various shapes, such as a cylinder, a cuboid, etc.

[0093] In the battery device 1100, there can be multiple battery cells 1120. These multiple battery cells 1120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that the multiple battery cells 1120 are connected in both series and parallel. The multiple battery cells 1120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 1120 is housed within the battery box 1110. Alternatively, the battery device 1100 can also consist of multiple battery cells 1120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the battery box 1110. The battery device may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 1120.

[0094] Each battery cell 1120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 1120 can be cylindrical, flat, cuboid, or other shapes.

[0095] Please see Figure 3 , Figure 3 It shows Figure 2 The diagram shows an exploded view of battery cell 1120. Battery cell 1120 refers to the smallest unit that makes up battery device 1100. Figure 3 The battery cell 1120 includes an end cap 1121, a housing 1122, a cell assembly 1123, and other functional components.

[0096] End cap 1121 refers to a component that covers the opening of housing 1122 to isolate the internal environment of battery cell 1120 from the external environment. The shape of end cap 1121 can be adapted to the shape of housing 1122 to fit it. Optionally, end cap 1121 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 1121 is not easily deformed under pressure and impact, allowing battery cell 1120 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 1121a can be provided on end cap 1121. Electrode terminals 1121a can be used for electrical connection with cell assembly 1123 to output or input electrical energy from battery cell 1120. In some embodiments, end cap 1121 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 1120 reaches a threshold. The end cap 1121 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating structure may also be provided on the inner side of the end cap 1121. The insulating structure can be used to isolate the electrical connection components inside the housing 1122 from the end cap 1121 to reduce the risk of short circuit. For example, the insulating structure can be plastic, rubber, etc.

[0097] The housing 1122 is a component used to cooperate with the end cap 1121 to form the internal environment of the battery cell 1120. This internal environment can accommodate the cell assembly 1123, electrolyte, and other components. The housing 1122 and the end cap 1121 can be independent components. An opening can be provided on the housing 1122, and the end cap 1121 can be used to close the opening to form the internal environment of the battery cell 1120. Alternatively, the end cap 1121 and the housing 1122 can be integrated. Specifically, the end cap 1121 and the housing 1122 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 1122, the end cap 1121 closes the housing 1122. The housing 1122 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 1122 can be determined according to the specific shape and size of the cell assembly 1123. The shell 1122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0098] The cell assembly 1123 is the component in the battery cell 1120 where the electrochemical reaction occurs. The casing 1122 may contain one or more cell assemblies 1123. The cell assembly 1123 is mainly formed by stacking composite strips 400, which are formed by thermally bonding a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the cell assembly 1123, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 1100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 1121a to form a current circuit.

[0099] Please combine Figures 4 to 6 , Figure 4 A schematic diagram of the connection structure between the battery box body and the cooling plate of some embodiments of this application is shown. Figure 5 It shows Figure 4 An exploded view of the connection structure between the housing and the cooling plate. Figure 6 It shows Figure 5 The top view of the box shown.

[0100] The battery assembly includes individual battery cells and a battery housing. The housing includes a frame and a base plate 200 disposed on one side of the frame, the frame and the base plate 200 defining an accommodating space in which the individual battery cells are housed. A cooling plate 300 is disposed within the accommodating space, and a cooling channel 210 for the flow of cooling medium is defined between the cooling plate 300 and the base plate 200, and the cooling plate 300 supports the individual battery cells.

[0101] The battery cells can be mounted on the cooling plate 300, allowing the cooling plate 300 to dissipate heat from the battery cells. Since a cooling channel 210 for the flow of cooling medium is defined between the cooling plate 300 and the base plate 200, the heat generated by the battery cells can be transferred through the cooling plate 300 to the cooling medium in the cooling channel 210, so that the cooling medium carries away the heat during its flow, thus dissipating heat from the battery cells.

[0102] A liquid inlet and a liquid outlet can be provided, both connected to the cooling channel 210. The liquid inlet allows cooling medium to flow into the cooling channel 210, and the liquid outlet allows cooling medium to flow out of the cooling channel 210. The liquid inlet can be located on the base plate 200 or the cooling plate 300. The liquid outlet can be located on the base plate 200 or the cooling plate 300.

[0103] In the battery device provided in this application embodiment, individual battery cells can be mounted on the cooling plate 300. Since a cooling channel 210 is defined between the cooling plate 300 and the base plate 200, the heat generated by the individual battery cells can be transferred through the cooling plate 300 to the cooling medium within the cooling channel 210. The cooling medium carries away the heat during its flow, thus dissipating heat from the individual battery cells. Therefore, the battery device provided in this application embodiment utilizes the base plate 200 and the cooling plate 300 to jointly define the cooling channel 210, eliminating the need for two layers of liquid cooling plates to define the cooling channel. This eliminates the need for one layer of liquid cooling plate, reducing its thickness and weight, and consequently, lightening the weight of the battery device.

[0104] The following describes the specific structure of the battery device.

[0105] Specifically, the base plate 200 is connected to one end of the frame, and the frame is arranged around the circumference of the base plate 200, thereby defining the aforementioned accommodating space between the frame and the base plate 200 to accommodate the battery cell. Figure 4 and Figure 5 As shown, the frame may include multiple sidewalls 100 connected end-to-end in sequence. Each sidewall 100 is connected to a different side of the base plate 200 along its circumference, thus allowing the frame to surround the base plate 200 circumferentially. Figure 4 and Figure 5 In the illustrated embodiment, the frame includes four sidewalls 100, and the base plate 200 is quadrilateral. Of course, the base plate 200 can also be other polygons, and the number of sidewalls in the frame can be three, five, or other quantities. The sides of the polygonal base plate 200 correspond to the number of sidewalls in the frame. The base plate can also be a circular base plate, and the frame can also have a circular sidewall, or the frame can consist of two semi-circular sidewalls connected end-to-end.

[0106] The cooling plate 300 is located within the surrounding space of the frame, that is, within the aforementioned accommodating space. Battery cells can be mounted on the cooling plate 300, thereby allowing the cooling plate 300 to dissipate heat from the battery cells.

[0107] Please combine Figures 4 to 6 In one embodiment, the base plate 200 is provided with a channel groove for forming a cooling channel 210. Cooling plates 300 are stacked on the base plate 200 and cover the channel groove, so that the cooling channel 210 is defined between the cooling plates 300 and the base plate 200.

[0108] exist Figure 5In the illustrated embodiment, the flow channel groove is recessed from the side of the base plate 200 facing the cooling plate 300 to the other side, thus the side of the flow channel groove closest to the cooling plate 300 is open. By stacking the cooling plates 300 on the base plate 200, the cooling plates 300 can cover the open side of the flow channel groove on the base plate 200, thereby defining a cooling flow channel 210 between the cooling plates 300 and the base plate 200. The extending direction of the flow channel groove is the extending direction of the cooling flow channel 210.

[0109] In other embodiments, a flow channel for the cooling medium can be formed on the side of the cooling plate 300 facing the base plate 200. This flow channel is recessed from the side of the cooling plate 300 facing the base plate 200 to the other side, so that the side of the flow channel near the base plate 200 is open. By stacking the cooling plate 300 and the base plate 200, the base plate 200 can cover the open side of the flow channel on the cooling plate 300, thereby defining a cooling flow channel between the cooling plate 300 and the base plate 200.

[0110] Optionally, a first flow channel groove for the cooling medium to flow can be formed on the base plate 200. The first flow channel groove is recessed from the side of the base plate 200 facing the cooling plate 300 to the other side, so that the side of the first flow channel groove near the cooling plate 300 has a first opening. A second flow channel groove for the cooling medium to flow can be formed on the side of the cooling plate 300 facing the base plate 200. The second flow channel groove is recessed from the side of the cooling plate 300 facing the base plate 200 to the other side, so that the side of the second flow channel groove near the base plate 200 has a second opening. The first opening and the second opening have the same shape and are positioned correspondingly. The cooling plates 300 are stacked on the base plate 200, and the cooling plates 300 and the base plate 200 cover the open sides of the first and second flow channel grooves, so that the first and second flow channel grooves can be closed to form a cooling channel.

[0111] In some embodiments, the material density of the cooling plate 300 is greater than that of the base plate 200.

[0112] The base plate 200 can be made of non-metallic materials, such as plastic. Specifically, the base plate 200 can be made of materials such as glass fiber reinforced plastic. Glass fiber reinforced plastic is lightweight, has high specific strength, is corrosion resistant, and has good electrical insulation properties. The cooling plate 300 can be made of metallic materials, such as aluminum or copper. Metallic materials have good thermal conductivity, so a metallic cooling plate 300 can quickly and effectively transfer the heat generated by the battery cells to the cooling medium in the cooling channel 210.

[0113] By using a lower-density base plate 200, the weight of the battery box can be further reduced, thereby further reducing the weight of the battery assembly. Meanwhile, the cooling plate 300 has a relatively high material density, which allows it to reliably support the individual battery cells.

[0114] In some embodiments, the frame and the base plate 200 are integrally formed.

[0115] The base plate 200 can be made of non-metallic materials, such as plastic. The base plate 200 can also be made of materials such as glass fiber reinforced plastic. The frame and base plate 200 can be processed into a single molded structure using methods such as injection molding. The frame and base plate 200 can be made of the same material or different materials.

[0116] The frame and base plate 200 are integrally molded structures, eliminating the need to mold the frame and base plate 200 structures separately and then connect them, thus facilitating the processing and assembly of the box.

[0117] Please combine Figures 5 to 8 , Figure 5 It shows Figure 4 An exploded view of the connection structure between the housing and the cooling plate. Figure 6 It shows Figure 5 The top view of the box shown. Figure 7 It shows Figure 4 The side view of the connection structure between the box and the cooling plate shown. Figure 8 It shows Figure 7 The diagram shows a cross-sectional view (AA) of the connection structure between the housing and the cooling plate.

[0118] In some embodiments, the cooling channel 210 includes multiple channel segments 211 arranged sequentially at intervals and multiple connecting segments 212. In any three adjacent channel segments 211, the two ends of the middle channel segment 211 are connected to the two adjacent channel segments 211 through corresponding connecting segments 212.

[0119] Specifically, the spacing direction of the multiple flow channel segments 211 is along the first direction, which can be... Figures 4 to 6 and Figure 8 The direction of XX' in the flow channel. The extension direction of flow channel segment 211 is along the second direction, which can be... Figures 4 to 6 and Figure 8 The first direction XX' intersects the second direction YY'. Optionally, the first direction XX' is perpendicular to the second direction YY'. Optionally, the second direction YY' is along the length of the base plate 200, and the first direction XX' is along the width of the base plate 200.

[0120] In any three adjacent flow channel segments 211, the middle flow channel segment 211 has connecting segments 212 at both ends. One end of the connecting segment 212 of the middle flow channel segment 211 connects to the end of an adjacent flow channel segment 211, and the other end of the connecting segment 212 of the middle flow channel segment 211 connects to the end of another adjacent flow channel segment 211, thus creating a structure in which the cooling flow channel 210 forms multiple repeated bends. Optionally, the connecting segment 212 extends in an arc shape.

[0121] In other embodiments, the extension direction of the cooling channel may also take other forms as known in the prior art, which will not be elaborated here.

[0122] Please combine Figures 5 to 8 In some embodiments, the battery box further includes an adhesive layer 400 and a first adhesive barrier 500 disposed on the base plate 200. The first adhesive barrier 500 is disposed on the base plate 200 and surrounds the cooling channel 210 along the circumferential contour of the cooling channel 210.

[0123] The cooling plate 300 is bonded to the base plate 200 by means of an adhesive layer 400, and the adhesive layer 400 is located outside the enclosure area of ​​the first adhesive barrier 500.

[0124] Specifically, the first adhesive dam 500 is disposed along the circumferential contour of the cooling channel 210. Therefore, the shape enclosed by the first adhesive dam 500 is similar to the contour shape of the cooling channel 210, thus enabling the first adhesive dam 500 to surround the cooling channel 210. The first adhesive dam 500 is disposed on the side of the base plate 200 facing the cooling plate 300, and the first adhesive dam 500 protrudes from the base plate 200, thereby allowing the first adhesive dam 500 to block the adhesive layer 400 outside the area it encloses.

[0125] By setting a first adhesive barrier 500 on the base plate 200, and the first adhesive barrier 500 is arranged around the cooling channel 210, the adhesive layer 400 can be blocked outside the area enclosed by the first adhesive barrier 500. That is, by blocking the adhesive layer 400 outside the cooling channel 210 by the first adhesive barrier 500, the adhesive layer 400 can be prevented from entering the cooling channel 210 and affecting the effective cross-sectional area of ​​the cooling circuit as much as possible.

[0126] Please combine Figures 5 to 8 In some embodiments, the battery box further includes a second adhesive barrier 600 disposed on the base plate 200, the second adhesive barrier 600 surrounding the cooling channel 210 along its circumferential contour. The second adhesive barrier 600 is located on the side of the first adhesive barrier 500 near the cooling channel 210. The second adhesive barrier 600 and the first adhesive barrier 500 are spaced apart to define an overflow groove 601.

[0127] Specifically, the second adhesive dam 600 is arranged around the cooling channel 210 along its circumferential contour. Therefore, the shape enclosed by the second adhesive dam 600 is similar to the contour shape of the cooling channel 210, thus allowing the second adhesive dam 600 to completely surround the cooling channel 210. Since the second adhesive dam 600 is located on the side of the first adhesive dam 500 closest to the cooling channel 210, that is, between the first adhesive dam 500 and the cooling channel 210, the first adhesive dam 500 surrounds the second adhesive dam 600. The overflow groove 601 formed by the space between the second adhesive dam 600 and the first adhesive dam 500 is arranged around the outer periphery of the cooling channel 210. The second adhesive dam 600 is disposed on the side of the base plate 200 facing the cooling plate 300, and the second adhesive dam 600 protrudes from the base plate 200, so that the second adhesive dam 600 can further block the adhesive layer 400 outside the area it encloses.

[0128] When the adhesive layer 400 is installed outside the area enclosed by the first adhesive dam 500, if the amount of adhesive is too large, the adhesive layer 400 can overflow over the first adhesive dam 500 into the overflow groove 601 between the first adhesive dam 500 and the second adhesive dam 600. On the one hand, this can reduce the possibility of excessively thick adhesive layer between the cooling plate 300 and the base plate 200; on the other hand, if too much adhesive layer 400 overflows into the overflow groove 601, it can be further blocked by the second adhesive dam 600 outside the cooling channel 210, thereby further preventing the adhesive layer 400 from entering the cooling channel 210 and affecting the effective cross-sectional area of ​​the cooling circuit.

[0129] Please combine Figures 9 to 11 , Figure 9 It shows Figure 4 A top view of the connection structure between the housing and the cooling plate shown. Figure 10 It shows Figure 9 The diagram shows a BB cross-sectional view of the connection structure between the housing and the cooling plate. Figure 11 It shows Figure 10 A magnified view of a portion of region A in the middle.

[0130] In some embodiments, the second rubber dam 600 protrudes beyond the height of the base plate 200, which is higher than the height of the first rubber dam 500 protruding beyond the base plate 200.

[0131] Since the protrusion height of the second adhesive dam 600 is higher than that of the first adhesive dam 500, the second adhesive dam 600 blocks the adhesive layer 400 at a higher height than the first adhesive dam 500, which further increases the difficulty for the adhesive layer 400 to enter the cooling channel 210.

[0132] Even if the amount of adhesive in the adhesive layer 400 is too large and overflows into the overflow tank 601 beyond the first adhesive barrier 500, the second adhesive barrier 600 can still effectively block the adhesive in the overflow tank 601 from the outside of the cooling channel 210.

[0133] Please combine Figures 9 to 11 In some embodiments, the cooling plate 300 is sealed against the end of the second baffle 600 facing away from the base plate 200.

[0134] By abutting against the end of the second adhesive dam 600 facing away from the base plate 200, the cooling plate 300 can be limited, that is, the distance between the cooling plate 300 and the base plate 200 can be limited, thereby limiting the thickness of the adhesive layer 400 between the cooling plate 300 and the base plate 200, and thus effectively controlling the thickness of the adhesive layer 400.

[0135] The cooling plate 300 and the second baffle 600 are tightly attached to the end facing away from the bottom plate 200 to achieve a sealed fit between them. This allows the cooling channel 210 to be enclosed within the area enclosed by the second baffle 600, and isolates the adhesive layer 400 outside the area enclosed by the second baffle 600. This more effectively prevents the adhesive layer 400 from entering the cooling channel 210 and affecting the effective cross-sectional area of ​​the cooling circuit.

[0136] If the connection between the cooling plate 300 and the base plate 200 is unreliable, the cooling channel 210 will not be properly sealed, easily causing the cooling medium to leak between the cooling plate 300 and the base plate 200, and leak from the cooling plate 300 to the side of the cooling plate 300 near the battery cell, which will affect the insulation inside the battery box and the safety of the battery device. Therefore, please refer to... Figure 6 , Figure 8 and Figure 11 In some embodiments, a drain trough 702 is defined between the cooling plate 300 and the base plate 200. The base plate 200 is provided with a drain hole 701 that communicates with the drain trough 702. The drain trough 702 is located outside the cooling channel 210.

[0137] Specifically, the drain trough 702 can be located at any position outside the cooling channel 210. For example, the drain trough 702 can be located between the cooling channel 210 and any side wall of the frame, or the drain trough 702 can be arranged around the cooling channel 210 along the circumference of the base plate 200, that is, the drain trough 702 is located between multiple side walls 100 and the cooling channel 210. The drain trough 702 is located between the cooling plate 300 and the base plate 200, therefore, the surfaces of the cooling plate 300 and the base plate 200 facing each other are the two opposite walls of the drain trough 702.

[0138] When the connection between the cooling plate 300 and the base plate 200 is unreliable, causing the cooling channel 210 to be poorly sealed, the cooling medium will leak along the gap between the cooling plate 300 and the base plate 200 to the side wall of the accommodating space. In the process, it will pass through the drain trough 702 outside the cooling channel 210, enter the drain trough 702, and then be discharged to the outside of the battery box through the drain hole 701. This reduces the risk of the cooling medium leaking from the gap between the cooling plate 300 and the side wall of the accommodating space to the side of the cooling plate 300 near the battery cell.

[0139] Please combine Figures 9 to 11 In some embodiments, the battery box further includes a first liquid-blocking rib 710 disposed on the base plate 200. The first liquid-blocking rib 710 is located between the cooling channel 210 and the side wall of the accommodating space, and the end of the first liquid-blocking rib 710 facing away from the base plate 200 is sealed and abuts against the cooling plate 300. The drain groove 702 is located between the first liquid-blocking rib 710 and the frame.

[0140] Specifically, the first baffle 710 can be positioned anywhere between the cooling channel 210 and the frame. For example, if the first baffle 710 is positioned between the cooling channel 210 and any side wall of the frame, then the drain groove 702 is located between the first baffle 710 and any side wall of the frame. Alternatively, the first baffle 710 can be arranged to surround the cooling channel 210 circumferentially around the base plate 200, in which case the drain groove 702 can also surround the cooling channel 210 circumferentially around the base plate 200. The first baffle 710 can serve as one wall of the drain groove 702.

[0141] By having the end of the first liquid-blocking rib 710 facing away from the base plate 200 abut against and fit against the cooling plate 300, a sealed fit can be achieved between the end of the first liquid-blocking rib 710 facing away from the base plate 200 and the cooling plate 300. This effectively isolates the cooling channel 210 from the drain trough 702, thus enhancing the sealing performance of the cooling channel 210. Even if there is leakage of cooling medium in the cooling channel 210, the first liquid-blocking rib 710 can, to a certain extent, block the cooling medium, reducing the risk of the cooling medium flowing towards the frame across the gap between the first liquid-blocking rib 710 and the cooling plate 300.

[0142] Of course, even if the cooling medium flows towards the frame through the first baffle 710 and the cooling plate 300, it will first pass through the drain trough 702, and then be discharged to the outside of the battery box through the drain trough 702 and the drain hole 701.

[0143] Please combine Figures 9 to 11In some embodiments, the first liquid-blocking rib 710 is located between the first adhesive-blocking dam 500 and the frame. The first liquid-blocking rib 710 and the first adhesive-blocking dam 500 are spaced apart, so that the adhesive layer 400 can be disposed between the first liquid-blocking rib 710 and the first adhesive-blocking dam 500. The first adhesive-blocking dam 500 can prevent the adhesive layer 400 from entering the drainage tank 702, thereby maximizing the drainage space in the drainage tank 702.

[0144] Please combine Figures 9 to 11 In some embodiments, the battery box further includes a second liquid-retaining rib 720 disposed on the base plate 200. The second liquid-retaining rib 720 is located between the first liquid-retaining rib 710 and the frame, and the end of the second liquid-retaining rib 720 facing away from the base plate 200 is sealed and abutted against the cooling plate 300. The second liquid-retaining rib 720 and the first liquid-retaining rib 710 are spaced apart to define the drain groove 702. An adhesive portion 410 (e.g., adhesive) is provided between the second liquid-retaining rib 720 and the frame for bonding the base plate 200 and the cooling plate 300.

[0145] Specifically, the second baffle 720 and the first baffle 710 are two opposite walls of the drain trough 702. The extension direction and shape of the second baffle 720 are similar to those of the first baffle 710. For example, when the first baffle 710 is located between the cooling channel 210 and any side wall of the frame, the second baffle 720 is located between the first baffle 710 and any side wall of the frame. When the first baffle 710 surrounds the cooling channel 210 circumferentially around the bottom plate 200, the second baffle 720 surrounds the first baffle 710 circumferentially around the bottom plate 200.

[0146] By having the end of the second liquid-blocking rib 720 facing away from the base plate 200 abut against and fit against the cooling plate 300, a sealed fit can be achieved between the end of the second liquid-blocking rib 720 facing away from the base plate 200 and the cooling plate 300. After the cooling medium enters the drain trough 702, the sealed fit between the end of the second liquid-blocking rib 720 facing away from the base plate 200 and the cooling plate 300 can further prevent the cooling medium from flowing towards the frame, thereby further reducing the amount of cooling medium entering the side of the cooling plate 300 near the battery cell from between the cooling plate 300 and the frame.

[0147] The adhesive portion 410 between the second baffle 720 and the frame further bonds the base plate 200 and the cooling plate 300, thereby enhancing the connection reliability between the base plate 200 and the cooling plate 300 and improving the sealing performance of the cooling channel 210. Furthermore, after the cooling medium enters the drain trough 702, the adhesive portion 410 between the second baffle 720 and the frame can prevent the cooling medium from flowing towards the frame, further reducing the risk of the cooling medium entering the side of the cooling plate 300 near the battery cell from between the cooling plate 300 and the frame.

[0148] In one embodiment, there are multiple drain holes 701. These drain holes 701 are arranged at intervals along the extending direction of the drain tank 702, thereby enabling the cooling medium in the drain tank 702 to be quickly discharged from the drain holes 701. Alternatively, the multiple drain holes 701 may be arranged circumferentially around the base plate 200.

[0149] Please refer to Figure 12 , Figure 12 It shows Figure 4 This is a schematic diagram of the connection structure between the housing and the cooling plate from another perspective. In one embodiment, a reinforcing rib structure is provided on the side of the base plate 200 facing away from the cooling plate 300. The reinforcing rib structure includes multiple reinforcing ribs 800 spaced apart along a first direction and multiple reinforcing ribs 800 spaced apart along a second direction. The first direction and the second direction intersect.

[0150] Specifically, the first direction could be Figure 12 In the direction of XX', the second direction can be Figure 12 The first direction XX' is perpendicular to the second direction YY'. Optionally, the second direction YY' is along the length of the base plate 200, and the first direction XX' is along the width of the base plate 200.

[0151] Since the first direction and the second direction intersect, the multiple reinforcing ribs 800 spaced apart along the first direction and the multiple reinforcing ribs 800 spaced apart along the second direction intersect each other to form a grid-like reinforcing rib structure, which can effectively enhance the load-bearing strength of the base plate 200.

[0152] The battery box provided in this application embodiment includes a box body and a cooling plate 300. The box body includes a frame and a bottom plate 200. The bottom plate 200 is connected to one end of the frame, and the frame is arranged around the circumference of the bottom plate 200. The cooling plate 300 is located within the surrounding space of the frame. The cooling plate 300 and the bottom plate 200 are stacked and connected, and a cooling channel 210 is defined between the cooling plate 300 and the bottom plate 200 for the flow of cooling medium. The material density of the bottom plate 200 is less than that of the cooling plate 300. The battery box also includes an adhesive layer 400 and a first adhesive barrier 500 and a second adhesive barrier 600 disposed on the bottom plate 200. The cooling plate 300 and the bottom plate 200 are bonded together by the adhesive layer 400. The second adhesive barrier 600 is disposed around the outer periphery of the cooling channel 210. A first adhesive-blocking dam 500 surrounds the second adhesive-blocking dam 600 and is spaced apart from it to define an overflow groove 601. An adhesive layer 400 is disposed outside the area enclosed by the first adhesive-blocking dam 500. The second adhesive-blocking dam 600 protrudes from the base plate 200 at a greater height than the first adhesive-blocking dam 500. The cooling plate 300 is sealed against the end of the second adhesive-blocking dam 600 facing away from the base plate 200. The battery box also includes a first liquid-blocking rib 710 and a second liquid-blocking rib 720 disposed on the base plate 200. The ends of the first liquid-blocking rib 710 and the second liquid-blocking rib 720 facing away from the base plate 200 are respectively sealed against the cooling plate 300. The second liquid-blocking rib 720 is located between the first liquid-blocking rib 710 and the frame. The second liquid-blocking rib 720 is spaced apart from the first liquid-blocking rib 710 to define a drain groove 702. The base plate 200 is provided with a drain hole 701 that communicates with the drain groove 702. The second baffle rib 720 is provided with an adhesive part 410 between itself and the frame for bonding the base plate 200 and the cooling plate 300.

[0153] When the battery box provided in this embodiment is applied to a battery device, the cooling channel 210 is defined by the bottom plate 200 and the cooling plate 300 of the box body, thus eliminating the need for two layers of liquid cooling plates to define the cooling channel, thereby saving one layer of liquid cooling plate and reducing the weight of the battery device. By using a bottom plate 200 with a lower density, the weight of the battery box can be further reduced. At the same time, the material density of the cooling plate 300 is relatively high, so it can reliably support the battery cells. When the amount of adhesive layer 400 provided outside the area enclosed by the first adhesive dam 500 is too large, the adhesive layer 400 can overflow into the overflow groove 601. On the one hand, this can reduce the possibility of an excessively thick adhesive layer between the cooling plate 300 and the bottom plate 200; on the other hand, when the adhesive layer 400 overflows into the overflow groove 601, it can be further blocked outside the cooling channel 210 by the second adhesive dam 600. By abutting the end of the cooling plate 300 against the base plate 200 of the second adhesive dam 600, the distance between the cooling plate 300 and the base plate 200 can be limited, thereby effectively controlling the thickness of the adhesive layer 400. The sealed fit between the cooling plate 300 and the second adhesive dam 600 isolates the adhesive layer 400 outside the area enclosed by the second adhesive dam 600, thus more effectively blocking the adhesive layer 400. When the connection between the cooling plate 300 and the base plate 200 is unreliable, causing the cooling channel 210 to leak, the cooling medium, during its leakage along the gap between the cooling plate 300 and the base plate 200 towards the frame, will pass through the drain trough 702 outside the cooling channel 210, enter the drain trough 702, and then be discharged to the outside of the battery box through the drain hole 701. This reduces the risk of the cooling medium leaking from between the cooling plate 300 and the frame to the side of the cooling plate 300 closer to the battery cell. The second liquid-blocking rib 720 and the first liquid-blocking rib 710 are sealed and abutted against the cooling plate 300 at the ends facing away from the bottom plate 200. The adhesive portion 410 between the second liquid-blocking rib 720 and the frame can further block the cooling medium, reducing the risk of the cooling medium entering the side of the cooling plate 300 near the battery cell from between the cooling plate 300 and the frame.

[0154] This application also provides a battery device, which includes a battery cell and a battery case according to any of the above embodiments, wherein the battery cell is located inside the battery case.

[0155] In the aforementioned battery device, individual battery cells can be mounted on the cooling plate 300. Since a cooling channel 210 is defined between the cooling plate 300 and the base plate 200, the heat generated by the individual battery cells can be transferred through the cooling plate 300 to the cooling medium within the cooling channel 210. The cooling medium carries away the heat during its flow, thus dissipating heat from the individual battery cells. Therefore, the battery box provided in this embodiment utilizes the base plate 200 and the cooling plate 300 to jointly define the cooling channel 210, eliminating the need for two layers of liquid cooling plates to define the cooling channel. This eliminates the need for one layer of liquid cooling plate, reducing its thickness and weight, and consequently, lightening the weight of the battery device.

[0156] This application also provides an electrical device that includes a battery device according to any of the above embodiments, the battery device being used to provide electrical energy to the electrical device.

[0157] In the aforementioned electrical equipment, the battery cells of the battery device can be mounted on the cooling plate 300. Since a cooling channel 210 is defined between the cooling plate 300 and the base plate 200, the heat generated by the battery cells can be transferred through the cooling plate 300 to the cooling medium within the cooling channel 210. The cooling medium carries away the heat during its flow, thus dissipating heat from the battery cells. Therefore, the battery box provided in this embodiment utilizes the base plate 200 and the cooling plate 300 to jointly define the cooling channel 210, eliminating the need for two layers of liquid cooling plates to define the cooling channel. This eliminates the need for one layer of liquid cooling plate, reducing its thickness and weight, and consequently, lightening the weight of the battery device.

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

Claims

1. A battery device, characterized by, The battery device comprises a battery cell and a battery box; The battery box comprises: a box body comprising a frame and a bottom plate (200) arranged on one side of the frame, the frame and the bottom plate (200) defining a containing space in which the battery cell is contained; and a cooling plate (300) arranged in the containing space, the cooling plate (300) and the bottom plate (200) defining a cooling flow channel (210) for the flow of a cooling medium therebetween, and the cooling plate (300) supporting the battery cell.

2. The battery device according to claim 1, characterized by The battery box further comprises: a first glue dam (500) arranged on the bottom plate (200), the first glue dam (500) surrounding the cooling flow channel (210) along the circumferential contour of the cooling flow channel (210); and a bonding layer (400) by which the cooling plate (300) is bonded to the bottom plate (200), and the bonding layer (400) being located outside the surrounding area of the first glue dam (500).

3. The battery device according to claim 2, wherein the battery box further comprises a second glue dam (600) arranged on the bottom plate (200); the second glue dam (600) surrounds the cooling flow channel (210) along the circumferential contour of the cooling flow channel (210); the second glue dam (600) is located on the side of the first glue dam (500) close to the cooling flow channel (210); the second glue dam (600) is arranged in spaced relation with the first glue dam (500) to define a glue overflow groove (601). The height of the second glue dam (600) protruding from the bottom plate (200) is higher than the height of the first glue dam (500) protruding from the bottom plate (200).

4. The battery device of claim 3, wherein The cooling plate (300) is sealingly abutted against one end of the second glue dam (600) away from the bottom plate (200).

5. The battery device of claim 4, wherein The cooling plate (300) and the bottom plate (200) further define a liquid discharge groove (702), and the bottom plate (200) is provided with a liquid discharge hole (701) in communication with the liquid discharge groove (702), the liquid discharge groove (702) being located outside the cooling flow channel (210).

6. The battery device of claim 1, wherein 7. The battery device according to claim 6, wherein the battery box further comprises a first liquid barrier rib (710) arranged on the bottom plate (200); the first liquid barrier rib (710) is located between the cooling flow channel (210) and the frame, and one end of the first liquid barrier rib (710) away from the bottom plate is sealingly abutted against the cooling plate (300); the liquid discharge groove (702) is located between the first liquid barrier rib (710) and the frame. ​ 8. The battery device of claim 7, wherein, The battery box further comprises a second liquid blocking rib (720) arranged on the bottom plate (200); the second liquid blocking rib (720) is located between the first liquid blocking rib (710) and the frame, and an end of the second liquid blocking rib (720) away from the bottom plate (200) is in sealing abutment with the cooling plate (300); The second liquid blocking rib (720) is arranged in spaced relation with the first liquid blocking rib (710) to define the liquid discharge groove (702); A bonding portion (410) for bonding the bottom plate (200) and the cooling plate (300) is arranged between the second liquid blocking rib (720) and the frame.

9. The battery device according to claim 1, wherein A reinforcing rib structure is arranged on a side of the bottom plate (200) away from the cooling plate (300); The reinforcing rib structure comprises a plurality of reinforcing ribs (800) arranged in spaced relation along a first direction (XX') and a plurality of reinforcing ribs (800) arranged in spaced relation along a second direction (YY'); The first direction intersects the second direction.

10. The battery device according to claim 1, wherein A flow channel groove for forming the cooling flow channel (210) is arranged on the bottom plate (200); The cooling plate (300) is arranged in stacked relation on the bottom plate (200) and covers the flow channel groove, so that the cooling flow channel (210) is defined between the cooling plate (300) and the bottom plate (200).

11. The battery device of claim 1, wherein The frame and the bottom plate (200) are in one-piece structure.

12. The battery device of claim 1, wherein, The cooling plate (300) is made of metal material, and the bottom plate (200) is made of non-metal material.

13. The battery device of claim 12, wherein, The battery device according to any one of claims 1-13 is used to provide electric energy for the electric equipment.

14. An electrical device, characterized by ​

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