Battery device, electric equipment and liquid cooling box body structure

Abstract

The utility model provides a battery device, electric equipment and a liquid cooling box body structure. The battery device includes: a plurality of battery cells; the battery box body is provided with an accommodating cavity; the plurality of single batteries are accommodated in the accommodating cavity; the battery box body comprises a heat exchange piece configured to exchange heat with the battery cells, the heat exchange piece is provided with a liquid guide channel, and the liquid guide channel is provided with a first port and a second port; the liquid inlet connector is provided with a liquid inlet channel, and the liquid inlet channel is communicated with the first port; the liquid outlet connector is provided with a liquid outlet channel, and the liquid outlet channel is communicated with the second port; the liquid inlet channel is of a necking structure or a flaring structure in the liquid inlet direction. And / or the liquid outlet channel is of a necking structure in the liquid outlet direction. According to the battery device, the problems of water flow noise and abnormal sound in the battery box body are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely is a kind of battery device, electric equipment and liquid cooling box structure. BACKGROUND

[0002] In the related art, the battery device can include a battery cell and a battery box. The battery cell is disposed in the battery box. The battery box has a liquid guide pipe for heat dissipation of the battery cell. However, the existing battery box produces water flow noise and abnormal sound. SUMMARY

[0003] The battery device, electric equipment and liquid cooling box structure provided by the present application aim to solve the problem of water flow noise and abnormal sound in the existing battery box.

[0004] To solve the above technical problems, one technical scheme of the present application is to provide a battery device, which comprises:

[0005] a plurality of battery cells;

[0006] a battery box having a receiving cavity; the plurality of battery cells are received in the receiving cavity; the battery box comprises:

[0007] a heat exchange element configured to exchange heat with the battery cells, the heat exchange element having a liquid guide channel, and the liquid guide channel having a first port and a second port;

[0008] a liquid inlet connector having a liquid inlet channel, and the liquid inlet channel being in communication with the first port;

[0009] a liquid outlet connector having a liquid outlet channel, and the liquid outlet channel being in communication with the second port;

[0010] wherein the liquid inlet channel is a converging or diverging structure along the liquid inlet direction; and / or the liquid outlet channel is a converging structure along the liquid outlet direction.

[0011] The battery box described above has the liquid inlet channel being a converging or diverging structure along the liquid inlet direction; and / or the liquid outlet channel being a converging structure along the liquid outlet direction. In this way, the converging or diverging structure can be used to guide the flow of the cooling liquid, so that the cooling liquid can smoothly flow into the liquid guide channel from the liquid inlet channel or smoothly flow out of the liquid outlet channel during the flow process. This reduces the risk of collision between the cooling liquids during the flow process, and the risk of collision between the cooling liquid and the inner wall surface of the liquid inlet channel or the liquid outlet channel. Thus, the problem of water flow noise and abnormal sound in the battery box is effectively improved.

[0012] In one embodiment, the liquid inlet channel has a width in the first direction that decreases or increases along the liquid inlet direction; wherein the first direction is perpendicular to the height direction of the battery box and the liquid inlet direction; and / or

[0013] The liquid outlet channel has a width in the second direction that decreases along the liquid outlet direction; wherein the second direction is perpendicular to the height direction of the battery box and the liquid outlet direction.

[0014] The above scheme can utilize the inner walls on both sides of the liquid inlet channel along the first direction to guide the cooling liquid, thereby reducing the noise caused by water flow collision; at the same time, the size of the liquid inlet joint along the height direction of the battery box can be designed according to the actual situation, thereby facilitating the lightweight production of the product. And / or utilize the inner walls on both sides of the liquid outlet channel along the second direction to guide the cooling liquid, thereby reducing the noise caused by water flow collision; at the same time, the size of the liquid outlet joint along the height direction of the battery box can be designed according to the actual situation, thereby facilitating the lightweight production of the product.

[0015] In one embodiment, the height of the liquid inlet channel in the height direction of the battery box is the same at each position along the first direction; and / or, the height of the liquid outlet channel in the height direction of the battery box is the same at each position along the second direction.

[0016] The above scheme can adapt the thickness of the liquid inlet joint and / or the liquid outlet joint to the thickness of the heat exchange element, without increasing the thickness of the heat exchange element or replacing the existing heat exchange element, thereby having a wide application range, low cost, and being conducive to the lightweight production of the product.

[0017] In one embodiment, the liquid inlet channel has opposite first and second side surfaces along the first direction; the first and second side surfaces are planar or curved; and / or,

[0018] The liquid outlet channel has opposite third and fourth side surfaces along the second direction, and the third and fourth side surfaces are planar or curved.

[0019] The above scheme can guide the cooling liquid through planar or curved surfaces, so that the cooling liquid flows smoothly along the extension direction of the planar or curved surfaces during the flow process; compared with the scheme in which the first, second, third, and fourth side surfaces are stepped, the risk of the cooling liquid colliding with the stepped surface along the first direction and then rebounding, and then colliding with the upstream normally flowing cooling liquid to form a vortex, and the vortex further generating bubbles, and the bubbles appearing water flow sound when flowing out of the water outlet of the liquid outlet channel, is reduced.

[0020] In one embodiment, the battery box further comprises: a frame body arranged on the heat exchange member; and the frame body cooperates with the heat exchange member to form the accommodating cavity.

[0021] In one embodiment, the liquid inlet connector is integrally formed with at least one side wall of the frame body; and / or the liquid outlet connector is integrally formed with at least one side wall of the frame body.

[0022] In one embodiment, the liquid inlet connector is integrally formed with at least one side wall of the frame body; and / or the liquid outlet connector is integrally formed with at least one side wall of the frame body.

[0023] In one embodiment, the heat exchange member has a first cavity and a second cavity in communication with each other; and the heat exchange member comprises a plurality of first partitioning ribs and a plurality of second partitioning ribs; the plurality of first partitioning ribs are arranged in the first cavity at intervals and divide the first cavity into a plurality of first flow guide cavities; the plurality of second partitioning ribs are arranged in the second cavity at intervals and divide the second cavity into a plurality of second flow guide cavities, the second flow guide cavities being in communication with the first flow guide cavities.

[0024] In one embodiment, the first cavity has a first cavity inlet close to the liquid inlet channel; the second cavity has a first cavity outlet close to the liquid outlet channel; a first straight line distance between one end of the first partitioning rib close to the first cavity inlet and the first cavity inlet is 15-60 mm; and / or a second straight line distance between one end of the second partitioning rib close to the first cavity outlet and the first cavity outlet is 15-60 mm.

[0025] In one embodiment, the first straight line distance between one end of the first partitioning rib close to the first cavity inlet and the first cavity inlet is 15-60 mm; within this distance range, the risk of the cooling liquid directly colliding with the first partitioning rib after entering the first cavity from the liquid inlet channel and then rebounding to collide with the upstream normally entering cooling liquid to form a vortex is reduced, thereby reducing the risk of product flow noise and abnormal sound in the battery box. And / or, the second straight line distance between one end of the second partitioning rib close to the first cavity outlet and the first cavity outlet is 15-60 mm; within this distance range, the risk of the cooling liquid flowing out of the second cavity directly colliding with the side wall of the liquid inlet connector and the liquid outlet connector and then rebounding to form a vortex is reduced.

[0026] In one embodiment, the first cavity and the second cavity are arranged adjacent along the first direction; a plurality of the first partitioning ribs are arranged in the first cavity at intervals along the first direction, and the first linear distance gradually increases in a direction away from the second cavity; and / or;

[0027] a plurality of the second partitioning ribs are arranged in the second cavity at intervals along the first direction, and the second linear distance gradually increases in a direction away from the first cavity.

[0028] The above scheme can gradually increase the flow of the cooling liquid in the first cavity in the first direction away from the second cavity, that is, the flow of the cooling liquid is greater on the side edge of the heat exchange element along the first direction, so that as the flow of the cooling liquid increases, the cooling effect of the battery box on the battery monomer also increases, which is more conducive to effectively cooling the corresponding position of the battery monomer. And / or the flow of the cooling liquid in the second cavity gradually increases in the first direction away from the first cavity, and similarly, as the flow of the cooling liquid increases, the cooling effect of the battery box on the battery monomer also increases, so as to effectively dissipate heat at the edge position of the battery monomer.

[0029] In one embodiment, the liquid inlet channel has a first liquid inlet and a first liquid outlet; along the height direction of the battery device, there is a height difference between the first liquid inlet and the first liquid outlet; and the liquid inlet channel is in a stepped shape, the step includes a plurality of first steps connected in sequence, and the corners of each first step and the connections between adjacent two first steps are connected and transitioned by a curved surface; and / or

[0030] The liquid outlet channel has a second liquid inlet and a second liquid outlet; along the height direction of the battery device, there is a height difference between the second liquid inlet and the second liquid outlet; and the liquid outlet channel is in a stepped shape, the step includes a plurality of second steps connected in sequence, and the corners of each second step and the connections between adjacent two second steps are connected and transitioned by a curved surface.

[0031] The above scheme, when there is a height difference between the liquid inlet and the liquid outlet, by connecting and transitioning the corners of the steps and the connections between adjacent two steps by a curved surface, the curved surface can be used to guide the flow of the cooling liquid, so that the cooling liquid can smoothly flow from the liquid inlet channel to the liquid guide channel or smoothly flow out of the liquid outlet channel during the flow process., reduces the risk of collision between the cooling liquids during the flow process, and the collision between the cooling liquid and the inner wall surface of the liquid inlet channel or the inner wall surface of the liquid outlet channel, thereby effectively improving the water flow noise in the battery box and the problem of abnormal noise.

[0032] In one embodiment, the liquid inlet channel has a first liquid inlet and a first liquid outlet; there is a height difference between the first liquid inlet and the first liquid outlet along the height direction of the battery device; and the liquid inlet channel smoothly and obliquely extends from the first liquid inlet to the first liquid outlet.

[0033] The liquid outlet channel has a second liquid inlet and a second liquid outlet; there is a height difference between the second liquid inlet and the second liquid outlet along the height direction of the battery device; and the liquid outlet channel smoothly and obliquely extends from the second liquid inlet to the second liquid outlet.

[0034] The above scheme can guide the cooling liquid by the inclined surface between the liquid inlet and the liquid outlet when there is a height difference between the liquid inlet and the liquid outlet, so that the cooling liquid can smoothly flow from the liquid inlet channel to the liquid guide channel or smoothly flow out of the liquid outlet channel during the flow process, reducing the risk of collision between the cooling liquids during the flow process and the collision between the cooling liquids and the inner wall surface of the liquid inlet channel or the inner wall surface of the liquid outlet channel, thereby effectively improving the water flow noise in the battery box and the problem of abnormal noise. At the same time, by smoothly transitioning through the inclined surface, there is no step on the inclined surface compared to the above-mentioned transition through the stepped structure, and there is no large corner in the cooling liquid flow process, further reducing the risk of vortex caused by the rebound of the cooling liquid, leading to abnormal noise.

[0035] In one embodiment, the plane where the heat exchange element is located is taken as the reference plane; along the height direction of the battery device, the height position of the first liquid inlet is higher than the height position of the first liquid outlet; and / or the height position of the second liquid inlet is lower than the height position of the second liquid outlet.

[0036] The above scheme can make the first liquid inlet of the liquid inlet connector and the second liquid outlet of the liquid outlet connector located on the same side of the heat exchange element along the height direction of the battery box after the liquid inlet connector and the liquid outlet connector are connected with the heat exchange element; compared with the scheme that part of the liquid inlet connector and part of the liquid outlet connector are located on both sides of the heat exchange element along the height direction of the battery box, the volume of the battery box can be reduced, and the floor area can be saved; and the battery box can be in contact with the bearing surface through the heat exchange element, improving the stability of the battery box and preventing the liquid inlet connector and the liquid outlet connector from being in contact with the bearing surface, which can damage the bearing surface or the liquid inlet connector or the liquid outlet connector. At the same time, the first liquid inlet and the second liquid outlet can have a certain height difference with the heat exchange element and the bearing surface along the height direction of the battery box, which facilitates the connection of the outlet pipe with the first liquid inlet and the connection of the inlet pipe with the second liquid outlet.

[0037] In one embodiment, the liquid inlet connector comprises a liquid inlet body and a first connecting portion and a second connecting portion connected to opposite sides of the liquid inlet body; the liquid inlet channel passes through the liquid inlet body, the first connecting portion and the second connecting portion; the first connecting portion protrudes into the accommodation cavity and is connected to the heat exchange member; the second connecting portion protrudes out of the accommodation cavity and is configured to be connected to the liquid outlet pipe of the liquid storage body; and / or

[0038] The liquid outlet connector comprises a liquid outlet body and a third connecting portion and a fourth connecting portion connected to opposite sides of the liquid outlet body; the liquid outlet channel passes through the liquid outlet body, the third connecting portion and the fourth connecting portion; the third connecting portion protrudes into the accommodation cavity and is connected to the heat exchange member; the fourth connecting portion protrudes out of the accommodation cavity and is configured to be connected to the liquid inlet pipe of the liquid storage body.

[0039] The above scheme can improve the connection sealing of the liquid inlet channel and the liquid outlet channel with the liquid guide channel; and facilitate the connection of the liquid inlet connector with the liquid outlet pipe and the connection of the liquid outlet connector with the liquid inlet pipe.

[0040] In one embodiment, the first direction is parallel to the second direction; and the liquid inlet connector and the liquid outlet connector are located on the same side of the heat exchange member; wherein the first orthographic projection of the second connecting portion on the heat exchange member along the liquid inlet direction is located on both side edges or near the edge of the heat exchange member along the first direction with the second orthographic projection of the fourth connecting portion on the heat exchange member along the liquid outlet direction.

[0041] The above scheme facilitates the arrangement of the liquid storage body by making the first direction parallel to the second direction and arranging the liquid inlet connector and the liquid outlet connector on the same side of the heat exchange member, and one liquid storage body can realize the circulation of the cooling liquid in the battery box. In addition, by arranging the liquid inlet connector and the liquid outlet connector on both side edges or near the edge of the heat exchange member, the backflow of the cooling liquid is more facilitated.

[0042] To solve the above technical problems, another technical scheme adopted by the present application is to provide an electric device, comprising: a device main body; and the battery device as described above, which is arranged in the device main body.

[0043] To solve the above technical problems, still another technical scheme adopted by the present application is to provide a liquid cooling box structure, comprising:

[0044] a heat exchange member configured to exchange heat with the battery monomer, the heat exchange member having a liquid guide channel, the liquid guide channel having a first port and a second port;

[0045] a liquid inlet connector having a liquid inlet channel, the liquid inlet channel being in communication with the first port;

[0046] A liquid outlet connector has a liquid outlet channel, which is connected to the second port;

[0047] Wherein, the liquid inlet channel has a constricted or flared structure along the liquid inlet direction; and / or, the liquid outlet channel has a constricted structure along the liquid outlet direction.

[0048] 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, specific embodiments of this application are given below. Attached Figure Description

[0049] 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:

[0050] Figure 1 This is a schematic diagram of the overall structure of a battery box provided in one embodiment of this application;

[0051] Figure 2 for Figure 1 A disassembly diagram of the battery box shown;

[0052] Figure 3 for Figure 1 A schematic diagram of the overall structure of the first side wall of the battery box frame from a first perspective.

[0053] Figure 4 for Figure 1 A schematic diagram of the overall structure of the first side wall of the battery box frame from a second perspective;

[0054] Figure 5 for Figure 4 The M-side view of the structure shown;

[0055] Figure 6 for Figure 5 A sectional view of the structure shown along line AA;

[0056] Figure 7 for Figure 1 The battery housing shown is viewed from the N side.

[0057] Figure 8 for Figure 7 A BB-direction sectional view of the structure shown;

[0058] Figure 9 forFigure 8 a local view at E in Fig.

[0059] Figure 10 a top view of the structure shown in Fig. Figure 4

[0060] Figure 11 a C-C or D-D sectional view of the structure shown in Fig. Figure 10

[0061] Figure 12 a structure schematic view of the liquid inlet channel or liquid outlet channel provided by another embodiment of the present application.

[0062] Legend of reference signs

[0063] 100 battery box; 10 accommodating cavity

[0064] 1 heat exchange member; 11a first plate material; 11b second plate material; 12 first partition rib; 121 first flow guide cavity; 13 second partition rib; 131 second flow guide cavity; 14 first inlet cavity; 15 first outlet cavity

[0065] 2 liquid inlet connector; 21 liquid inlet channel; 211 first side face; 212 second side face; 213 first liquid inlet; 214 first liquid outlet; 22 first connecting portion; 23 second connecting portion; 24 corner; 25 connecting position

[0066] 3 liquid outlet connector; 31 liquid outlet channel; 311 third side face; 312 fourth side face; 313 second liquid inlet; 314 second liquid outlet; X liquid inlet direction; Z height direction; Y first direction; 32 third connecting portion; 33 fourth connecting portion

[0067] 4 frame body; 41 first side wall; 42 second side wall; 43 third side wall; 44 fourth side wall

[0068] L1 first linear distance; L2 second linear distance DETAILED DESCRIPTION

[0069] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. ​​

[0071] In the description of the embodiments of the present application, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0072] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0073] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0074] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0075] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0076] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0077] In the related art, the battery device can be a single physical module including a battery box and one or more battery cells arranged in the battery box to provide higher voltage and capacity. Where there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple battery cells.

[0078] In some cases, the battery cell has a cubic structure with a length, a width, and a height. The length of the battery cell is greater than the width of the battery cell, and the height of the battery cell is greater than the width of the battery cell.

[0079] To protect the functions, life, performance, etc. of the battery cell, the battery box is required to have heat management capability, scratch-proof capability, side column collision, impact vibration, etc. However, the battery box has many components, and water flow noise and abnormal sound are easily generated.

[0080] Based on the above considerations, the embodiments of the present application provide a battery device, a power consumption device, and a liquid cooling box structure. The liquid inlet channel is in a converging or diverging structure along the liquid inlet direction, and / or the liquid outlet channel is in a converging structure along the liquid outlet direction. In this way, the converging or diverging structure can be used to guide the flow of the cooling liquid. The cooling liquid can smoothly flow into the liquid guide channel from the liquid inlet channel or smoothly flow out of the liquid outlet channel during the flow process. The risk of collision between the cooling liquids during the flow process and the risk of collision between the cooling liquid and the inner wall surface of the liquid inlet channel or the inner wall surface of the liquid outlet channel are reduced. Thus, the problem of water flow noise and abnormal sound in the battery box is effectively improved.

[0081] In some embodiments, the battery device related to the embodiments of the present application can be used in a power consumption device using the battery device as a power source. The power consumption device related to the embodiments of the present application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc. According to the power source, the vehicle can be a fuel car, a gas car, or a new energy car. The new energy car can be a pure electric car, a hybrid car, or a range extender car, etc. According to the driving mode, the vehicle can be a front-drive car, a rear-drive car, or a four-wheel-drive car.

[0082] The power consumption device includes a device body and the battery device involved in the context. The device body is the main frame structure of the power consumption device. For example, when the power consumption device is a vehicle, the device body is the vehicle body. When the power consumption device is a ship, the device body is the ship body.

[0083] In other embodiments, the battery device described in this application can also be used in an energy storage system that uses the battery device as an energy storage element. The energy storage system may include energy storage containers, energy storage cabinets, etc.

[0084] For ease of description, this application uses a vehicle as an example to illustrate the embodiments of the electrical device.

[0085] In some embodiments, the aforementioned battery device is disposed inside the vehicle, and the battery device may be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, the controller being used to control the battery device to supply power to the motor, for example, for the vehicle's power needs during starting, navigation, and driving.

[0086] In some embodiments, the battery device can serve not only as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0087] In some embodiments, please refer to Figures 1 to 6 , Figure 1 This is a schematic diagram of the overall structure of a battery box provided in one embodiment of this application; Figure 2 for Figure 1 A disassembly diagram of the battery box shown; Figure 3 for Figure 1 A schematic diagram of the overall structure of the first side wall of the battery box frame from a first perspective. Figure 4 for Figure 1 A schematic diagram of the overall structure of the first side wall of the battery box frame from a second perspective; Figure 5 for Figure 4 The M-side view of the structure shown; Figure 6 for Figure 5 The diagram shows a cross-sectional view along line AA. The battery device may include a battery housing 100 and multiple battery cells (not shown). The internal space of the battery housing 100 forms a receiving cavity 10, within which the multiple battery cells are received.

[0088] In some embodiments, multiple battery cells can be connected in series, parallel, or mixed to form a whole, and then the whole formed by the multiple battery cells is directly housed in the receiving cavity 10 of the battery housing 100. In other embodiments, multiple battery cells can also be connected in series, parallel, or mixed to form a battery module, and the battery module is housed in the receiving cavity 10 of the battery housing 100. In still other embodiments, multiple battery cells can also be connected in series, parallel, or mixed to form multiple battery modules, and the multiple battery modules can then be connected in series, parallel, or mixed to form a whole, and housed in the receiving cavity 10 of the battery housing 100.

[0089] As an example, a plurality of battery cells can be fixed to form a battery module by a tie strap or the like. As an example, a plurality of battery cells can also be fixed to form a battery module by an end plate, a side plate, or the like.

[0090] In some embodiments, the battery case 100 can be part of a chassis structure of a vehicle. For example, part of the battery case 100 can become at least part of the chassis of the vehicle, or part of the battery case 100 can become at least part of the cross beam and the longitudinal beam of the vehicle.

[0091] The battery cell involved in the embodiments of the present application refers to the smallest unit that stores and outputs electric energy. The battery cell can be a secondary battery or a primary battery. The battery cell can be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes. The battery case 100 is a structure with an internal space.

[0092] The battery case 100 includes a heat exchange member 1, a liquid inlet connector 2, and a liquid outlet connector 3. The heat exchange member 1 is configured to exchange heat with the battery cell, and the heat exchange member 1 can be a cooling plate. The heat exchange member 1 has a liquid guide channel, and the liquid guide channel has a first port and a second port. The liquid inlet connector 2 has a liquid inlet channel 21, and the liquid inlet channel 21 communicates with the first port of the liquid guide channel. The liquid outlet connector 3 has a liquid outlet channel 31, and the liquid outlet channel 31 communicates with the second port of the liquid guide channel.

[0093] In one embodiment, the liquid inlet channel 21 is a converging structure or a diverging structure along the liquid inlet direction X. In another embodiment, the liquid outlet channel 31 is a converging structure along the liquid outlet direction. In yet another embodiment, the liquid inlet channel 21 is a converging structure along the liquid inlet direction X, and the liquid outlet channel 31 is a converging structure along the liquid outlet direction; or the liquid inlet channel 21 is a diverging structure along the liquid inlet direction X, and the liquid outlet channel 31 is a converging structure along the liquid outlet direction.

[0094] The heat exchange member 1 is in the shape of a hollow plate and serves as the bottom wall of the battery case 100. The hollow structure of the heat exchange member 1 constitutes the liquid guide channel. The first port and the second port of the liquid guide channel are formed on the side wall surface of the heat exchange member 1 and serve as the inlet and outlet of the liquid guide channel, respectively. In one embodiment, the heat exchange member 1 is in the shape of a rectangle.

[0095] The liquid inlet connector 2 and the liquid outlet connector 3 are both pipe structures with internal flow channels. The internal flow channel of the liquid inlet connector 2 forms the liquid inlet channel 21. The internal flow channel of the liquid outlet connector 3 forms the liquid outlet channel 31. In some embodiments, the liquid inlet channel 21 directly communicates with the first port of the liquid guide channel without any other adapter therebetween. The liquid outlet channel 31 also directly communicates with the second port of the liquid guide channel without any other adapter therebetween.

[0096] The liquid inlet direction X refers to the direction in which the cooling liquid flows into the liquid guide channel through the liquid inlet channel 21; the liquid outlet direction refers to the direction in which the cooling liquid flows out of the liquid guide channel through the liquid outlet channel 31. The necking structure refers to a structure in which the hole diameter of the channel decreases along a predetermined direction; the necking structure is funnel-shaped. The flaring structure refers to a structure in which the hole diameter of the channel increases along a predetermined direction; the flaring structure is trumpet-shaped.

[0097] The cooling liquid flows into the liquid guide channel from the liquid inlet channel 21, spreads or converges through the liquid inlet channel 21, and flows into the liquid guide channel from the first port of the liquid guide channel, and then flows out from the second port along the predetermined flow direction of the liquid guide channel, and enters the liquid outlet channel 31, and converges and discharges the cooling liquid through the necking structure of the liquid outlet channel 31, to form a liquid cooling circulation system.

[0098] The battery box 100 described above has the liquid inlet channel 21 in the necking structure or the flaring structure along the liquid inlet direction X; and / or, the liquid outlet channel 31 in the necking structure along the liquid outlet direction; in this way, the necking structure or the flaring structure can be used to guide the flow of the cooling liquid, so that the cooling liquid can smoothly flow into the liquid guide channel from the liquid inlet channel 21 or smoothly flow out of the liquid outlet channel 31 during the flow process, reducing the risk of collision between the cooling liquids during the flow process, and collision between the cooling liquids and the inner wall surface of the liquid inlet channel 21 or the inner wall surface of the liquid outlet channel 31, thereby effectively improving the water flow noise in the battery box 100 and the problem of abnormal noise.

[0099] In one embodiment, referring to Figure 6 , the width W1 of the liquid inlet channel 21 in the first direction Y decreases or increases along the liquid inlet direction X; wherein the first direction Y is perpendicular to the height direction Z of the battery box 100 and the liquid inlet direction X.

[0100] In one embodiment, the width W2 of the liquid outlet channel 31 in the second direction decreases along the liquid outlet direction; wherein the second direction is perpendicular to the height direction Z of the battery box 100 and the liquid outlet direction.

[0101] In one embodiment, the width W1 of the liquid inlet channel 21 in the first direction Y decreases along the liquid inlet direction X; and the width W2 of the liquid outlet channel 31 in the second direction decreases along the liquid outlet direction.

[0102] In one embodiment, the width W1 of the liquid inlet channel 21 in the first direction Y increases along the liquid inlet direction X; and the width W2 of the liquid outlet channel 31 in the second direction decreases along the liquid outlet direction.

[0103] The width W1 of the liquid inlet channel 21 in the first direction Y is different and corresponds to a plurality of first width values along the liquid inlet direction X, and the plurality of first width values have a decreasing or increasing trend along the liquid inlet direction X. Similarly, along the liquid outlet direction, the width W2 of the liquid outlet channel 31 in the second direction is different and corresponds to a plurality of second width values, and the plurality of second width values have a decreasing trend along the liquid outlet direction. The decreasing trend can be gradual decrease or stepwise decrease. The increasing trend can also be gradual increase or stepwise increase. Gradual decrease or increase means that each value is different. Stepwise decrease or increase means that part of the adjacent values are the same, and the rest of the values are different.

[0104] The above scheme can utilize the inner wall surfaces on both sides of the liquid inlet channel 21 along the first direction Y to guide the cooling liquid, so as to reduce the noise caused by the collision of water flow. At the same time, the size of the liquid inlet connector 2 along the height direction Z of the battery box body 100 can be designed according to the actual situation, so as to facilitate the light and thin production of the product. And / or utilize the inner wall surfaces on both sides of the liquid outlet channel 31 along the second direction to guide the cooling liquid, so as to reduce the noise caused by the collision of water flow. At the same time, the size of the liquid outlet connector 3 along the height direction Z of the battery box body 100 can be designed according to the actual situation, so as to facilitate the light and thin production of the product.

[0105] In one embodiment, in combination Figure 3 The height H1 of the liquid inlet channel 21 along the first direction Y at each position in the height direction Z of the battery box body 100 is the same. It is easy to understand that along the first direction Y, each position of the liquid inlet channel 21 corresponds to a height value, and these height values are equal respectively. That is, the cross section of the liquid inlet channel 21 in the height direction Z of the battery box body 100 is a first cross section, and the first cross section has opposite first and second side edges in the height direction Z of the battery box body 100, and the first and second side edges are parallel to each other.

[0106] In this embodiment, the first cross section also has a third side edge and a fourth side edge in a direction perpendicular to the height direction Z of the battery box body 100, and the third and fourth side edges can be straight lines and parallel to each other. Of course, the third and fourth side edges can also be curves.

[0107] In one embodiment, in combination Figure 3 The height H2 of the liquid outlet channel 31 along the second direction at each position in the height direction Z of the battery box body 100 is the same. Similarly, it is easy to understand that along the second direction, each position of the liquid outlet channel 31 corresponds to a height value, and these height values are equal respectively. That is, the cross section of the liquid outlet channel 31 in the height direction Z of the battery box body 100 is a second cross section, and the second cross section has opposite fifth and sixth side edges in the height direction Z of the battery box body 100, and the fifth and sixth side edges are parallel to each other.

[0108] In this embodiment, the second cross section also has a seventh side and an eighth side in the direction perpendicular to the height direction Z of the battery box 100, and the seventh side and the eighth side can be straight lines and parallel to each other. Of course, the seventh side and the eighth side can also be curved lines.

[0109] In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces. Figure 3 In one embodiment, the height H1 of the liquid inlet channel 21 in the height direction Z of the battery box 100 is the same at each position along the first direction Y; and / or the height H2 of the liquid outlet channel 31 in the height direction Z of the battery box 100 is the same at each position along the second direction.

[0110] In this embodiment, the shapes of the first cross section and the second cross section can be the same or different.

[0111] The above scheme can make the height of the liquid inlet connector 2 and the liquid outlet connector 3 in the height direction Z of the battery box 100 adapt to the thickness of the heat exchange element 1, without increasing the thickness of the heat exchange element 1, directly using the existing heat exchange element, having a wide application range, low cost, and being conducive to the lightness and thinness of the product.

[0112] In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces. Figure 6 In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces.

[0113] In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces.

[0114] In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces.

[0115] In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces.

[0116] In one embodiment, the first side surface 211 and the second side surface 212 are curved surfaces, and the third side surface 311 and the fourth side surface 312 are curved surfaces.

[0117] The first side 211 and the second side 212 are flat or curved, specifically, the first side 211 and the second side 212 are flat or curved along the liquid inlet direction X. The third side 311 and the fourth side 312 are flat or curved, specifically, the third side 311 and the fourth side 312 are flat or curved along the liquid outlet direction.

[0118] The above scheme can guide the flow direction of the cooling liquid by flat or curved surfaces, so that the cooling liquid flows smoothly along the extension direction of the flat or curved surfaces during the flow process. Compared with the scheme in which the first side 211, the second side 212, the third side 311 and the fourth side 312 are in a stepped shape, the risk of the cooling liquid colliding with the step surface extending in the first direction Y or the second direction and then rebounding and colliding with the upstream normally flowing cooling liquid to form a vortex, and the vortex further generating bubbles, and the bubbles producing abnormal noise of water flow sound when flowing out of the water outlet of the liquid outlet channel 31 is reduced.

[0119] In one embodiment, in combination with Figure 1 and Figure 2 , the battery box 100 further comprises a frame 4 arranged on the heat exchange member 1, and the frame 4 cooperates with the heat exchange member 1 to form an accommodation cavity 10. In one example, the liquid inlet connector 2 is integrally formed with at least one side wall of the frame 4. In another example, the liquid outlet connector 3 is integrally formed with at least one side wall of the frame 4. In yet another example, the liquid inlet connector 2 is integrally formed with at least one side wall of the frame 4, and the liquid outlet connector 3 is integrally formed with at least one side wall of the frame 4.

[0120] The frame 4 forms the entire side wall of the battery box 100. The frame 4 can be plug-in connected with the peripheral edge of the heat exchange member 1 to improve the connection stability of the battery box 100. Of course, the frame 4 can also be welded or fixed to the heat exchange member 1 by other fixing members such as screws or studs.

[0121] The liquid inlet connector 2 and the liquid outlet connector 3 can be designed as a gating system in a casting process. The gating system includes a pouring system and an overflow system. The pouring system is a channel through which the molten metal fills the mold cavity under pressure. The overflow system includes an overflow groove and an exhaust groove. The overflow groove stores cold dirty metal liquid mixed with gas and paint residue, and cooperates with the exhaust groove to quickly guide the gas in the cavity out. During the entire filling process of the metal liquid, the pouring system and the overflow system are an integral whole.

[0122] As an example, in combination with Figure 1 , the frame 4 includes a first side wall 41, a second side wall 42, a third side wall 43 and a fourth side wall 44 connected in sequence. The liquid inlet connector 2 and the liquid outlet connector 3 are integrally formed with one of the four side walls, respectively.

[0123] The above scheme, by making the liquid inlet connector 2 and / or the liquid outlet connector 3 integrally formed with the frame 4, on the one hand, without the need to additionally add other connecting plate structures for mounting the liquid inlet connector 2 and the liquid outlet connector 3 which are different from the frame 4, reduces the parts of the battery box 100 and reduces the cost. On the other hand, compared with the scheme that the liquid inlet connector 2 and / or the liquid outlet connector 3 are detachably connected with the frame 4, not only is the preparation of the liquid inlet connector 2 and the liquid outlet connector 3 and the frame 4 facilitated, and the preparation process is simple; and there is no need to assemble the liquid inlet connector 2 and the liquid outlet connector 3 with the frame 4 again, which speeds up the preparation efficiency of the battery box 100; and enhances the connection strength of the liquid inlet connector 2 and the liquid outlet connector 3 with the frame 4.

[0124] In one embodiment, in combination with Figure 7 and Figure 8 , Figure 7 is Figure 1 the N side view of the battery box 100 shown in FIG. 1; Figure 8 is Figure 7 the B-B cross-sectional view of the structure shown in FIG. 1; Figure 9 is Figure 8 the local schematic view at E in FIG. 1. The heat exchange member 1 has a first cavity and a second cavity in communication with each other; the heat exchange member 1 includes a plurality of first partitioning ribs 12 and a plurality of second partitioning ribs 13. The plurality of first partitioning ribs 12 are spaced apart in the first cavity and divide the first cavity into a plurality of first flow guide cavities 121. The plurality of second partitioning ribs 13 are spaced apart in the second cavity and divide the second cavity into a plurality of second flow guide cavities 131, which are in communication with the first flow guide cavities 121; wherein the first cavity has a first cavity inlet 14 close to the liquid inlet passage 21; and the second cavity has a first cavity outlet 15 close to the liquid outlet passage 31.

[0125] In one example, the first straight line distance L1 between the one end of the first partitioning rib 12 close to the first cavity inlet 14 and the first cavity inlet 14 is 15-60 mm.

[0126] In another example, the second straight line distance L2 between the one end of the second partitioning rib 13 close to the first cavity outlet 15 and the first cavity outlet 15 is 15-60 mm.

[0127] In yet another example, the first straight line distance L1 between the one end of the first partitioning rib 12 close to the first cavity inlet 14 and the first cavity inlet 14 is 15-60 mm; and the second straight line distance L2 between the one end of the second partitioning rib 13 close to the first cavity outlet 15 and the first cavity outlet 15 is 15-60 mm.

[0128] As an example, in combination with Figure 2The heat exchange element 1 can include a first plate 11a and a second plate 11b arranged adjacent to each other along the first direction Y, and both the first plate 11a and the second plate 11b are hollow cavities with two ports. The hollow cavity of the first plate 11a forms a first cavity, and the first cavity can extend along a direction perpendicular to the first direction Y. The hollow cavity of the second plate 11b forms a second cavity, and the second cavity can also extend along a direction perpendicular to the first direction Y.

[0129] The first port of the first cavity is a first cavity inlet 14. Along the extension direction of the first cavity, the first cavity inlet 14 is arranged close to the liquid inlet channel 21, and the cooling liquid in the liquid inlet channel 21 enters the first cavity through the first cavity inlet 14. The second port of the first cavity is arranged on a side wall of the first cavity facing the second cavity.

[0130] The first port of the second cavity is a first cavity outlet 15. Along the extension direction of the second cavity, the first cavity outlet 15 is arranged close to the liquid outlet channel 31, and the cooling liquid in the second cavity enters the liquid outlet channel 31 through the first cavity outlet 15. The second port of the second cavity is arranged on a side wall of the second cavity facing the first cavity, and is arranged opposite to and in communication with the second port of the first cavity, so as to realize the communication between the first cavity and the second cavity.

[0131] The first plate 11a and the second plate 11b are both plate-shaped. The first plate 11a and the second plate 11b can be tightly attached along the first direction Y. The first plate 11a and the second plate 11b can be welded together, or can be glued together, or can be connected together through other fixing members; or the first plate 11a and the second plate 11b are integrally formed.

[0132] The first partitioning rib 12 and the second partitioning rib 13 are both plate-shaped.

[0133] The extension direction of the first partitioning rib 12 can be parallel to the extension direction of the first cavity; and the extension direction of the second partitioning rib 13 can be parallel to the extension direction of the second cavity. The first end of the first partitioning rib 12 extends towards the first cavity inlet 14 and is arranged in a spaced manner with the first cavity inlet 14. The second end of the first partitioning rib 12 opposite to the first end extends towards the other end of the first cavity opposite to the first cavity inlet 14, and the second end of the first partitioning rib 12 is arranged in a spaced manner with the other end of the first cavity opposite to the first cavity inlet 14.

[0134] The first end of the second partitioning rib 13 extends towards the first cavity outlet 15 and is arranged in a spaced manner with the first cavity outlet 15. The second end of the second partitioning rib 13 opposite to the first end extends towards the other end of the second cavity opposite to the first cavity outlet 15, and the second end of the second partitioning rib 13 is arranged in a spaced manner with the other end of the second cavity opposite to the first cavity outlet 15.

[0135] In combination with the above, the heat exchange element 1 can further include a first partitioning rib 12 and a second partitioning rib 13 arranged adjacent to each other along the first direction Y, and both the first partitioning rib 12 and the second partitioning rib 13 are hollow cavities with two ports. Figure 8The first partitioning rib 12 is arranged in the first direction Y and spaced apart from the two side cavity walls of the first cavity. The gap between the first partitioning rib 12 and the cavity wall of the first cavity cooperates with the heat exchange element 1 to form a first flow guide cavity 121. The gap between every two adjacent first partitioning ribs 12 arranged in the first direction Y cooperates with the heat exchange element 1 to form a first flow guide cavity 121.

[0136] Similarly, the second partitioning rib 13 is arranged in the first direction Y and spaced apart from the two side cavity walls of the second cavity. The gap between the second partitioning rib 13 and the cavity wall of the second cavity cooperates with the heat exchange element 1 to form a second flow guide cavity 131. The gap between every two adjacent second partitioning ribs 13 arranged in the first direction Y cooperates with the heat exchange element 1 to form a second flow guide cavity 131.

[0137] As an example, the first straight line distance L1 can be 30mm-60mm; the second straight line distance L2 can be 30mm-60mm.

[0138] In the above scheme, the first straight line distance L1 between the end of the first partitioning rib 12 close to the first inlet cavity 14 and the first inlet cavity 14 is 15mm-60mm. Within this distance range, the risk of the cooling liquid entering the first cavity from the liquid inlet channel 21 directly colliding with the first partitioning rib 12 and then rebounding to collide with the upstream normally entering cooling liquid to form a vortex, thereby reducing the risk of product water flow noise and abnormal sound in the battery box 100. And / or, the second straight line distance L2 between the end of the second partitioning rib 13 close to the first outlet cavity 15 and the first outlet cavity 15 is 15mm-60mm; this distance range can reduce the risk of the cooling liquid flowing out of the second cavity directly colliding with the side wall of the liquid inlet connector 2 and the liquid outlet connector 3 and then rebounding to form a vortex.

[0139] In one embodiment, in combination with Figure 9 The first cavity and the second cavity are arranged adjacent to each other in the first direction Y; a plurality of first partitioning ribs 12 are arranged in the first cavity in the first direction Y; and the first straight line distance L1 gradually increases in the direction away from the second cavity.

[0140] In another embodiment, a plurality of second partitioning ribs 13 are arranged in the second cavity in the second direction, and the second straight line distance L2 gradually increases in the direction away from the first cavity.

[0141] In yet another embodiment, a plurality of first partitioning ribs 12 are arranged in the first cavity in the first direction Y; and the first straight line distance L1 gradually increases in the direction away from the second cavity; a plurality of second partitioning ribs 13 are arranged in the second cavity in the second direction, and the second straight line distance L2 gradually increases in the direction away from the first cavity.

[0142] Each first segmentation rib 12 corresponds to a first linear distance L1, and the plurality of first linear distances L1 gradually increase in a direction away from the second cavity. The gradual increase can be that each two first linear distances L1 are different; or part of the adjacent first linear distances L1 are the same, that is, the plurality of first linear distances L1 increase in a stepped manner in the direction away from the second cavity.

[0143] Each second segmentation rib 13 corresponds to a second linear distance L2, and the plurality of second linear distances L2 gradually increase in a direction away from the first cavity. The gradual increase can be that each two second linear distances L2 are different; or part of the adjacent second linear distances L2 are the same, that is, the plurality of second linear distances L2 increase in a stepped manner in the direction away from the first cavity.

[0144] The above scheme can gradually increase the flow of the cooling liquid in the first cavity in the first direction Y in the direction away from the second cavity, that is, the flow of the cooling liquid is larger along the first direction Y closer to the side edge of the heat exchange element 1. In this way, as the flow of the cooling liquid increases, the cooling effect of the battery box 100 on the battery monomer also increases, which is more conducive to effectively cooling the corresponding position of the battery monomer. And / or the flow of the cooling liquid in the second cavity in the first direction Y gradually increases in the direction away from the first cavity, that is, the flow of the cooling liquid is larger along the first direction Y closer to the other side edge of the heat exchange element 1. Similarly, as the flow of the cooling liquid increases, the cooling effect of the battery box 100 on the battery monomer also increases, so as to effectively cool the edge position of the battery monomer.

[0145] In one embodiment, referring to Figure 10 and Figure 11 , Figure 10 is a top view of the structure shown in Figure 4 ; Figure 11 is a C-C or D-D sectional view of the structure shown in Figure 10 . The liquid inlet channel 21 has a first liquid inlet 213 and a first liquid outlet 214; there is a height difference between the first liquid inlet 213 and the first liquid outlet 214 in the height direction Z of the battery device; and the liquid inlet channel 21 is in a stepped shape, and the step includes a plurality of first steps connected in sequence, and the corner 24 of each first step and the connection 25 between the adjacent two first steps are connected and transitioned by a curved surface.

[0146] In one embodiment, in combination with Figure 11 , the liquid outlet channel 31 has a second liquid inlet 313 and a second liquid outlet 314; there is a height difference between the second liquid inlet 313 and the second liquid outlet 314 in the height direction Z of the battery device; and the liquid outlet channel 31 is in a stepped shape, and the step includes a plurality of second steps connected in sequence, and the corner 24 of each second step and the connection 25 between the adjacent two second steps are connected and transitioned by a curved surface.

[0147] In one embodiment, the liquid inlet channel 21 and the liquid outlet channel 31 are both stepped, and in the plurality of first steps, the corner 24 of each first step and the connection 25 between the adjacent two first steps are both connected and transitioned by a curved surface; and in the plurality of second steps, the corner 24 of each second step and the connection 25 between the adjacent two second steps are both connected and transitioned by a curved surface.

[0148] Wherein, the first liquid inlet 213 and the first liquid outlet 214 refer to the two ports of the liquid inlet channel 21; the cooling liquid enters the liquid inlet channel 21 through the first liquid inlet 213 and flows out through the first liquid outlet 214. The second liquid inlet 313 and the second liquid outlet 314 refer to the two ports of the liquid outlet channel 31; the cooling liquid enters the liquid outlet channel 31 through the second liquid inlet 313 and flows out through the second liquid outlet 314.

[0149] The "height difference" refers to the different height positions of the liquid inlet and the liquid outlet along the height direction Z of the battery box body 100. The step includes a plurality of steps connected in sequence, each step includes intersecting first step surface and second step surface, and the first step surface of one of the adjacent two steps is connected with the second step surface of the other step. The corner 24 of the step refers to the connection position of the first step surface and the second step surface in the same step. The connection 25 between the adjacent two steps refers to the connection position of the first step surface of one of the steps and the second step surface of the other step.

[0150] The connection and transition by the curved surface refer to that one side of the curved surface is connected with the first step surface, and the other side of the curved surface is connected with the second step surface, and the first step surface and the second step surface are smoothly connected by the curved surface to form a chamfer structure at the connection 25 of the first step surface and the second step surface.

[0151] The curved surface can be an arc surface; for example, a circular arc; the radius of the circle corresponding to the circular arc can be half of the size of the first step surface or the second step surface along the height direction Z of the battery box body 100.

[0152] The above scheme, when there is a height difference between the liquid inlet and the liquid outlet, by connecting and transitioning the corner 24 of the step and the connection 25 between the adjacent two steps by the curved surface, the curved surface can be used to guide the flow of the cooling liquid, so that the cooling liquid can smoothly flow into the liquid inlet channel 21 or smoothly flow out of the liquid outlet channel 31 during the flow process, reducing the risk of mutual collision of the cooling liquid during the flow process, and collision between the cooling liquid and the inner wall surface of the liquid inlet channel 21 or the inner wall surface of the liquid outlet channel 31, thereby effectively improving the water flow noise in the battery box body 100 and the problem of abnormal noise.

[0153] In one embodiment, referring to Figure 12 , Figure 12A structural schematic diagram of the liquid inlet passage 21 or the liquid outlet passage 31 provided for another embodiment of the present application; the liquid inlet passage 21 has a first liquid inlet 213 and a first liquid outlet 214; there is a height difference between the first liquid inlet 213 and the first liquid outlet 214 along the height direction Z of the battery device; and the liquid inlet passage 21 extends smoothly and obliquely from the first liquid inlet 213 to the first liquid outlet 214.

[0154] In one embodiment, the liquid outlet passage 31 has a second liquid inlet 313 and a second liquid outlet 314; there is a height difference between the second liquid inlet 313 and the second liquid outlet 314 along the height direction Z of the battery device; and the liquid outlet passage 31 extends smoothly and obliquely from the second liquid inlet 313 to the second liquid outlet 314.

[0155] In one embodiment, the liquid inlet passage 21 extends smoothly and obliquely from the first liquid inlet 213 to the first liquid outlet 214; and the liquid outlet passage 31 also extends smoothly and obliquely from the second liquid inlet 313 to the second liquid outlet 314.

[0156] Wherein, "smoothly and obliquely extending" means that there is no step or corner with a bending angle less than or equal to 90 degrees between the connecting wall surface of the liquid inlet and the liquid outlet, and the liquid inlet and the liquid outlet are connected by a smooth wall surface obliquely arranged relative to the plane where the heat exchange element 1 is located.

[0157] The smoothly and obliquely extending of the liquid inlet passage 21 from the first liquid inlet 213 to the first liquid outlet 214 means that all the inner wall surfaces of the liquid inlet passage 21 are smooth wall surfaces, without steps or corners with a bending angle less than or equal to 90 degrees. The smoothly and obliquely extending of the liquid outlet passage 31 from the second liquid inlet 313 to the second liquid outlet 314 means that all the inner wall surfaces of the liquid outlet passage 31 are smooth wall surfaces, without steps or corners with a bending angle less than or equal to 90 degrees.

[0158] The above scheme can utilize the inclined surface between the liquid inlet and the liquid outlet to guide the flow of the cooling liquid when there is a height difference between the liquid inlet and the liquid outlet, so that the cooling liquid can smoothly flow into the liquid inlet passage 21 or smoothly flow out of the liquid outlet passage 31 during the flow process, reducing the risk of collision between the cooling liquids during the flow process, and the risk of collision between the cooling liquids and the inner wall surfaces of the liquid inlet passage 21 or the liquid outlet passage 31, thereby effectively improving the water flow noise in the battery box 100 and the problem of abnormal noise. At the same time, through the smooth transition of the inclined surface, compared with the above transition through the stepped structure, there is no step or corner with a bending angle less than or equal to 90 degrees on the inclined surface, reducing the risk of vortex caused by the collision of the cooling liquid with the side wall of the step surface or the corner and then rebounding, resulting in abnormal noise.

[0159] In one embodiment, in combination with Figure 4 and Figure 12, the first liquid inlet 213 is located at a higher position than the first liquid outlet 214 along the height direction Z of the battery device.

[0160] In one embodiment, the second liquid inlet 313 is located at a lower position than the second liquid outlet 314 along the height direction Z of the battery device.

[0161] In one embodiment, the first liquid inlet 213 is located at a higher position than the first liquid outlet 214 along the height direction Z of the battery device; and the second liquid inlet 313 is located at a lower position than the second liquid outlet 314 along the height direction Z of the battery device.

[0162] The above scheme, after the liquid inlet connector 2 and the liquid outlet connector 3 are connected with the heat exchange element 1, the first liquid inlet 213 of the liquid inlet connector 2 and the second liquid outlet 314 of the liquid outlet connector 3 are located on the same side of the heat exchange element 1 along the height direction Z of the battery box 100; compared with the scheme that part of the liquid inlet connector 2 and part of the liquid outlet connector 3 are located on both sides of the heat exchange element 1 along the height direction Z of the battery box 100, the volume of the battery box 100 can be reduced, and the floor area can be saved; and the battery box 100 can be in contact with the bearing surface through the heat exchange element 1, which improves the stability of the battery box 100, and prevents the liquid inlet connector 2 and the liquid outlet connector 3 from being in contact with the bearing surface, which may damage the bearing surface or the liquid inlet connector 2 or the liquid outlet connector 3. In addition, the first liquid inlet 213 and the second liquid outlet 314 can have a certain height difference with the heat exchange element 1 and the bearing surface along the height direction Z of the battery box 100, which facilitates the connection of the liquid outlet pipe with the first liquid inlet 213 and the connection of the liquid inlet pipe with the second liquid outlet 314.

[0163] In one embodiment, please refer back to Figure 5 and Figure 6 The liquid inlet connector 2 includes a liquid inlet body and first and second connecting portions 22 and 23 connected to opposite sides of the liquid inlet body; the liquid inlet channel 21 penetrates through the liquid inlet body, the first connecting portion 22 and the second connecting portion 23; the first connecting portion 22 protrudes into the accommodating cavity 10 and is connected with the heat exchange element 1; and the second connecting portion 23 protrudes out of the accommodating cavity 10 and is configured to be connected with the liquid outlet pipe of the liquid storage body.

[0164] The liquid inlet body, the first connecting portion 22 and the second connecting portion 23 are integrally formed and have no actual difference therebetween; the part of the liquid inlet connector 2 protruding into the accommodating cavity 10 is defined as the first connecting portion 22; and the part of the liquid inlet connector 2 protruding out of the accommodating cavity 10 is defined as the second connecting portion 23.

[0165] In one embodiment, the liquid outlet connector 3 comprises a liquid outlet body and a third connecting portion 32 and a fourth connecting portion 33 connected to opposite sides of the liquid outlet body; the liquid outlet channel 31 penetrates through the liquid outlet body, the third connecting portion 32 and the fourth connecting portion 33; the third connecting portion 32 protrudes into the accommodating cavity 10 and is connected to the heat exchange element 1; the fourth connecting portion 33 protrudes out of the accommodating cavity 10 and is configured to be connected to the liquid inlet pipe of the liquid storage body.

[0166] The liquid outlet body, the third connecting portion 32 and the fourth connecting portion 33 are integrally formed and there is no actual difference between them; the part of the liquid outlet connector 3 protruding into the accommodating cavity 10 is defined as the third connecting portion 32; and the part of the liquid outlet connector 3 protruding out of the accommodating cavity 10 is defined as the fourth connecting portion 33.

[0167] In one embodiment, the liquid inlet connector 2 comprises a liquid inlet body and a first connecting portion 22 and a second connecting portion 23 connected to opposite sides of the liquid inlet body; the liquid inlet channel 21 penetrates through the liquid inlet body, the first connecting portion 22 and the second connecting portion 23; the first connecting portion 22 protrudes into the accommodating cavity 10 and is connected to the heat exchange element 1; the second connecting portion 23 protrudes out of the accommodating cavity 10 and is configured to be connected to the liquid outlet pipe of the liquid storage body. Moreover, the liquid outlet connector 3 comprises a liquid outlet body and a third connecting portion 32 and a fourth connecting portion 33 connected to opposite sides of the liquid outlet body; the liquid outlet channel 31 penetrates through the liquid outlet body, the third connecting portion 32 and the fourth connecting portion 33; the third connecting portion 32 protrudes into the accommodating cavity 10 and is connected to the heat exchange element 1; the fourth connecting portion 33 protrudes out of the accommodating cavity 10 and is configured to be connected to the liquid inlet pipe of the liquid storage body.

[0168] The liquid storage body mentioned above has a liquid storage cavity in which a cooling liquid is stored, and the cooling liquid can be liquid water. The liquid storage body has a liquid inlet pipe and a liquid outlet pipe communicating with the liquid storage cavity. The liquid outlet pipe is configured to be connected to the second connecting portion 23 to supply the liquid inlet channel 21 with liquid. The liquid inlet pipe is configured to be connected to the fourth connecting portion 33 to return the cooling liquid to the liquid storage cavity, forming a water cooling circulation system.

[0169] The above scheme can improve the connection sealing performance of the liquid inlet channel 21 and the liquid outlet channel with the liquid guide channel; and facilitate the connection of the liquid inlet connector 2 with the liquid outlet pipe and the connection of the liquid outlet connector 3 with the liquid inlet pipe.

[0170] In one embodiment, in combination with Figure 6 The first direction Y is parallel to the second direction; and the liquid inlet connector 2 and the liquid outlet connector 3 are located on the same side of the heat exchange element 1. The first orthographic projection of the second connecting portion 23 on the heat exchange element 1 along the liquid inlet direction X and the second orthographic projection of the fourth connecting portion 33 on the heat exchange element 1 along the liquid outlet direction are located on the two side edges or near the side edges of the heat exchange element 1 along the first direction Y.

[0171] The first orthographic projection is an orthographic projection of the second connecting portion 23 on the heat exchange member 1 along a direction perpendicular to the first direction Y. The second orthographic projection is an orthographic projection of the fourth connecting portion 33 on the heat exchange member 1 along a direction perpendicular to the first direction Y. In this embodiment, the liquid inlet direction X and the liquid outlet direction are parallel and opposite.

[0172] The above scheme facilitates the arrangement of the liquid storage body by arranging the first direction Y parallel to the second direction and arranging the liquid inlet connector 2 and the liquid outlet connector 3 on the same side of the heat exchange member 1, and one liquid storage body can realize the circulation of the cooling liquid in the battery box 100. In addition, arranging the liquid inlet connector 2 and the liquid outlet connector 3 on the two side edges or near the edges of the heat exchange member 1 facilitates the backflow of the cooling liquid.

[0173] Of course, in other embodiments, the first direction Y can be parallel to the second direction, and the liquid inlet connector 2 and the liquid outlet connector 3 can be located on opposite sides of the heat exchange member 1 along the liquid inlet direction X. Alternatively, the first direction Y and the second direction can be perpendicular to each other, and the liquid inlet connector 2 and the liquid outlet connector 3 can be located on adjacent sides of the heat exchange member 1.

[0174] In some embodiments, in combination with Figures 1 to 12 Further provided is a liquid-cooled box structure which can accommodate a to-be-cooled member. The to-be-cooled member can be a battery monomer or a battery module formed by a plurality of battery monomers in series, parallel or mixed connection. At this time, the liquid-cooled box structure is the battery box 100 as described above. Of course, in other embodiments, the to-be-cooled member can also be other devices that need to be cooled.

[0175] The liquid-cooled box structure includes the heat exchange member 1, the liquid inlet connector 2 and the liquid outlet connector 3. The heat exchange member 1 is configured to exchange heat with the battery monomer, and the heat exchange member 1 has a liquid guide channel having a first port and a second port. The liquid inlet connector 2 has a liquid inlet channel 21 which communicates with the first port of the liquid guide channel. The liquid outlet connector 3 has a liquid outlet channel 31 which communicates with the second port of the liquid guide channel. The liquid inlet channel 21 is a converging or diverging structure along the liquid inlet direction X; and / or the liquid outlet channel 31 is a converging structure along the liquid outlet direction. The specific structure and function of the liquid-cooled box structure are the same as or similar to those of the battery box 100 as described above, and specific reference can be made to the above.

[0176] The liquid cooling box structure provided by the embodiment has the following advantages: the inlet liquid passage 21 is in a converging or diverging structure along the inlet liquid direction X, and / or the outlet liquid passage 31 is in a converging structure along the outlet liquid direction. In this way, the converging or diverging structure can be used to guide the flow of the cooling liquid, so that the cooling liquid can smoothly flow into the liquid guiding passage from the inlet liquid passage 21 or smoothly flow out of the outlet liquid passage 31 during the flow process. The risk of collision between the cooling liquids during the flow process and the risk of collision between the cooling liquid and the inner wall surface of the inlet liquid passage 21 or the inner wall surface of the outlet liquid passage 31 are reduced, so that the water flow noise in the liquid cooling box structure is effectively improved, and the problem of abnormal noise is solved.

[0177] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a plurality of battery cells; a battery box having a receiving cavity; a plurality of the battery cells are received in the receiving cavity; the battery box comprises: a heat exchange member configured to exchange heat with the battery cells, the heat exchange member having a liquid guide channel, the liquid guide channel having a first port and a second port; a liquid inlet connector having a liquid inlet channel, the liquid inlet channel being in communication with the first port; a liquid outlet connector having a liquid outlet channel, the liquid outlet channel being in communication with the second port; wherein the liquid inlet channel is in a converging or diverging structure along a liquid inlet direction; and / or the liquid outlet channel is in a converging structure along a liquid outlet direction.

2. The battery device according to claim 1, wherein: a width of the liquid inlet channel in a first direction along the liquid inlet direction is in a decreasing or increasing trend; wherein the first direction is perpendicular to a height direction of the battery box and the liquid inlet direction; and / or a width of the liquid outlet channel in a second direction along the liquid outlet direction is in a decreasing trend; wherein the second direction is perpendicular to the height direction of the battery box and the liquid outlet direction.

3. The battery device according to claim 2, wherein: a height of the liquid inlet channel in the height direction of the battery box is the same at each position along the first direction; and / or a height of the liquid outlet channel in the height direction of the battery box is the same at each position along the second direction.

4. The battery device according to claim 3, wherein: the liquid inlet channel has opposite first and second side surfaces along the first direction; the first and second side surfaces are planar or curved; and / or the liquid outlet channel has opposite third and fourth side surfaces along the second direction; the third and fourth side surfaces are planar or curved.

5. The battery device according to any one of claims 2-4, wherein: the battery box further comprises a frame provided on the heat exchange member; the frame cooperates with the heat exchange member to form the receiving cavity; wherein the liquid inlet connector is integrally formed with at least one side wall of the frame; and / or the liquid outlet connector is integrally formed with at least one side wall of the frame.

6. The battery device according to any one of claims 2-4, wherein: the heat exchange member has a first cavity and a second cavity in communication with each other; and the heat exchange member comprises a plurality of first partitioning ribs and a plurality of second partitioning ribs; the plurality of first partitioning ribs are spaced apart in the first cavity and divide the first cavity into a plurality of first flow guide cavities; the plurality of second partitioning ribs are spaced apart in the second cavity and divide the second cavity into a plurality of second flow guide cavities, the second flow guide cavities being in communication with the first flow guide cavities. The first cavity has a first cavity inlet close to the liquid inlet channel; the second cavity has a first cavity outlet close to the liquid outlet channel; the first partitioning rib has a first linear distance between one end close to the first cavity inlet and the first cavity inlet, and the first linear distance is 15-60 mm; and / or the second partitioning rib has a second linear distance between one end close to the first cavity outlet and the first cavity outlet, and the second linear distance is 15-60 mm.

7. The battery device according to claim 6, wherein, the first cavity and the second cavity are arranged adjacently along the first direction; a plurality of the first partitioning ribs are arranged in the first cavity along the first direction, and the first linear distance gradually increases in a direction away from the second cavity; and / or; a plurality of the second partitioning ribs are arranged in the second cavity along the first direction, and the second linear distance gradually increases in a direction away from the first cavity.

8. The battery device according to claim 2, wherein, the liquid inlet channel has a first liquid inlet and a first liquid outlet; along the height direction of the battery device, there is a height difference between the first liquid inlet and the first liquid outlet; and the liquid inlet channel is in a stepped shape, and the step includes a plurality of first steps connected in sequence, and the corners of each first step and the connections between adjacent two first steps are connected by curved surfaces; and / or the liquid outlet channel has a second liquid inlet and a second liquid outlet; along the height direction of the battery device, there is a height difference between the second liquid inlet and the second liquid outlet; and the liquid outlet channel is in a stepped shape, and the step includes a plurality of second steps connected in sequence, and the corners of each second step and the connections between adjacent two second steps are connected by curved surfaces.

9. The battery device according to claim 2, wherein, the liquid inlet channel has a first liquid inlet and a first liquid outlet; along the height direction of the battery device, there is a height difference between the first liquid inlet and the first liquid outlet; and the liquid inlet channel is smoothly inclined from the first liquid inlet to the first liquid outlet; and / or the liquid outlet channel has a second liquid inlet and a second liquid outlet; along the height direction of the battery device, there is a height difference between the second liquid inlet and the second liquid outlet; and the liquid outlet channel is smoothly inclined from the second liquid inlet to the second liquid outlet.

10. The battery device according to claim 8 or 9, wherein, taking the plane where the heat exchange element is located as a reference plane; along the height direction of the battery device, the height position of the first liquid inlet is higher than the height position of the first liquid outlet; and / or the height position of the second liquid inlet is lower than the height position of the second liquid outlet.

11. The battery device according to any one of claims 2-4, wherein, The liquid inlet connector comprises a liquid inlet body and first and second connecting portions connected to opposite sides of the liquid inlet body; the liquid inlet channel runs through the liquid inlet body, the first connecting portion and the second connecting portion; the first connecting portion protrudes into the accommodation cavity and is connected to the heat exchange member; the second connecting portion protrudes out of the accommodation cavity and is configured to be connected to a liquid outlet pipe of the liquid storage body; and / or The liquid outlet connector comprises a liquid outlet body and third and fourth connecting portions connected to opposite sides of the liquid outlet body; the liquid outlet channel runs through the liquid outlet body, the third connecting portion and the fourth connecting portion; the third connecting portion protrudes into the accommodation cavity and is connected to the heat exchange member; the fourth connecting portion protrudes out of the accommodation cavity and is configured to be connected to a liquid inlet pipe of the liquid storage body.

12. The battery device according to claim 11, wherein the first direction is parallel to the second direction; and the liquid inlet connector and the liquid outlet connector are located on the same side of the heat exchange member; wherein a first orthographic projection of the second connecting portion on the heat exchange member along the liquid inlet direction is located on both side edges or near the side edges of the heat exchange member along the first direction as a second orthographic projection of the fourth connecting portion on the heat exchange member along the liquid outlet direction.

13. An electrical device, characterized by comprising: a device body; and the battery device according to any one of claims 1-12 is arranged in the device body.

14. A liquid-cooled tank structure, characterized by, comprising: a heat exchange member configured to exchange heat with a battery cell, the heat exchange member having a liquid guide channel with a first port and a second port; a liquid inlet connector having a liquid inlet channel in communication with the first port; a liquid outlet connector having a liquid outlet channel in communication with the second port; wherein the liquid inlet channel is in a converging or diverging structure along a liquid inlet direction; and / or the liquid outlet channel is in a converging structure along a liquid outlet direction.

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