CN223797387U - Battery device and electric equipment - Google Patents
Battery device and electric equipmentInfo
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- CN223797387U CN223797387U CN202422959099.XU CN202422959099U CN223797387U CN 223797387 U CN223797387 U CN 223797387U CN 202422959099 U CN202422959099 U CN 202422959099U CN 223797387 U CN223797387 U CN 223797387U
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Abstract
本申请涉及一种电池装置及用电设备，所述电池装置包括电池单体和电池箱；所述电池箱包括：箱体，所述箱体包括边框和设置于所述边框一侧的底板，所述边框和所述底板界定出容置空间，所述电池单体容置于所述容置空间内；及冷却板，所述冷却板设置于所述容置空间内，所述冷却板与所述底板之间界定出用于供冷却介质流通的冷却流道，且所述冷却板支撑所述电池单体。利用箱体的底壁与冷却板共同界定冷却流道，从而无需使用两层液冷板限定冷却流道，即可以省去一层液冷板，减小了液冷板的厚度，降低了液冷板的重量，进而能够减轻电池装置的重量。
This application relates to a battery device and an electrical appliance. The battery device includes a battery cell and a battery case. The battery case includes: a case body, the case body including a frame and a bottom plate disposed on one side of the frame, the frame and the bottom plate defining an accommodating space, the battery cell being housed within the accommodating space; and a cooling plate, the cooling plate being disposed within the accommodating space, the cooling plate and the bottom plate defining a cooling channel for the flow of cooling medium, and the cooling plate supporting the battery cell. By using the bottom wall of the case body and the cooling plate to jointly define the cooling channel, it is unnecessary to use two layers of liquid cooling plates to define the cooling channel, thus eliminating one layer of liquid cooling plate, reducing the thickness and weight of the liquid cooling plate, and consequently reducing the weight of the battery device.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery device and electric equipment.
Background
The battery device generally comprises a battery box and a battery unit, wherein the battery unit is arranged in the battery box. In the related art, a heat dissipation scheme of a battery device is generally that a liquid cooling plate with good heat conductivity is arranged at the bottom of a battery box, and a battery unit is placed on the liquid cooling plate. The liquid cooling plate is internally provided with a cooling flow passage for cooling medium to circulate, so that the heat of the battery monomer can be dissipated through the liquid cooling plate.
However, the liquid cooling plate in the related art is thick and heavy, resulting in a heavy battery device.
Disclosure of utility model
In view of the above, the present application provides a battery device and an electric device, which can reduce the weight of the battery device.
In a first aspect, the present application provides a battery device comprising a battery cell and a battery case;
the battery box includes:
The box body comprises a frame and a bottom plate arranged on one side of the frame, wherein the frame and the bottom plate define an accommodating space, the battery unit is accommodated in the accommodating space, and
The cooling plate is arranged in the accommodating space, a cooling flow passage for cooling medium circulation is defined between the cooling plate and the bottom plate, and the cooling plate supports the battery cells.
According to the battery device provided by the embodiment of the application, the cooling flow channel is defined between the cooling plate and the bottom plate, so that heat generated by the battery cells can be transferred to the cooling medium in the cooling flow channel through the cooling plate, and the heat is taken away in the flowing process of the cooling medium, so that the heat dissipation effect on the battery cells is achieved. The bottom plate and the cooling plate of the box body are utilized to jointly define the cooling flow channel, so that two layers of cooling plates are not required to be used for defining the cooling flow channel, one layer of cooling plate can be omitted, the thickness of the cooling plate can be reduced, the weight of the cooling plate is reduced, and the weight of the battery device can be further reduced.
In one embodiment, the bottom plate is provided with a runner groove for forming the cooling runner;
The cooling plate is arranged on the bottom plate in a laminated manner and covers the flow channel grooves so that the cooling flow channels are defined between the cooling plate and the bottom plate.
By arranging the cooling plate layer on the bottom plate, the cooling plate and the bottom plate are covered with each other, so that a cooling flow channel is defined between the cooling plate and the bottom plate.
In an embodiment, the material density of the cooling plate is greater than the material density of the bottom plate.
By employing a lower density base plate, the weight of the battery box can be further reduced, thereby further reducing the weight of the battery device. Meanwhile, the material density of the cooling plate is relatively high, so that the battery cells can be reliably carried.
In an embodiment, the material of the cooling plate is a metal material, and the material of the bottom plate is a non-metal material.
The metal material has good heat conductivity, so that the cooling plate made of the metal material can quickly and effectively transfer heat generated by the battery cells to the cooling medium in the cooling flow channel.
In an embodiment, the frame and the bottom plate are an integrally formed structure.
The frame and the bottom plate are of an integrated structure, and the frame and the bottom plate are not required to be respectively molded and connected, so that the processing and the assembly of the box body are facilitated.
In an embodiment, the battery box further comprises:
A first glue blocking dam arranged on the bottom plate and surrounding the cooling flow passage along the circumferential outline of the cooling flow passage, and
And the cooling plate is adhered to the bottom plate by means of the adhesive layer, and the adhesive layer is positioned at the outer side of the surrounding area of the first glue blocking dam.
Through setting up first fender and glue dykes and dams on the bottom plate, first fender is glued dykes and dams and is located cooling flow path around the periphery of cooling flow path to can keep off the tie coat outside the region that first fender is glued dykes and dams and enclose, keep off the tie coat outside cooling flow path through first fender promptly, and then can avoid the tie coat to get into the cooling flow path in influence cooling circuit's effective cross-section as far as possible.
The battery box further comprises a second glue blocking dam arranged on the bottom plate;
The second glue blocking dam surrounds the cooling flow channel along the circumferential outline of the cooling flow channel, and is positioned at one side of the first glue blocking dam close to the cooling flow channel;
The second glue blocking dykes and the first glue blocking dykes are arranged at intervals to define a glue overflow groove.
When the adhesive layer is arranged outside the area surrounded by the first glue blocking dam, if the adhesive quantity is too large, the adhesive layer can overflow into the glue overflow groove between the first glue blocking dam and the second glue blocking dam beyond the first glue blocking dam. On the one hand, the situation that the adhesive layer between the cooling plate and the bottom plate is too thick can be reduced, and on the other hand, when too much adhesive layer overflows into the adhesive overflow groove, the adhesive layer can be further blocked outside the cooling flow channel through the second adhesive blocking dam, and then the adhesive layer can be further blocked from entering the cooling flow channel to influence the effective sectional area of the cooling circuit.
In an embodiment, the second glue blocking dam protrudes from the bottom wall at a height higher than that of the first glue blocking dam.
Even if the adhesive quantity of the adhesive layer is too large so as to overflow into the adhesive overflow groove beyond the first adhesive blocking dam, the adhesive liquid in the adhesive overflow groove can be still fully and effectively blocked outside the cooling flow channel through the second adhesive blocking dam.
In an embodiment, the cooling plate is in sealing abutment with the second dam back of dam toward one end of the bottom plate.
Through cooling plate and the one end butt to the bottom plate of second fender dyke back of dam, can play the spacing effect to the cooling plate, inject the distance between cooling plate and the bottom plate promptly to can inject the thickness of the tie coat between cooling plate and the bottom plate, and then can effectively control the thickness of tie coat.
The cooling plate is closely attached to one end of the bottom plate, which is close to one end of the bottom plate, of the second glue blocking dam back of dam, so that the cooling flow channel is sealed in the area surrounded by the second glue blocking dam, the bonding layer is isolated outside the area surrounded by the second glue blocking dam, and the bonding layer can be effectively prevented from entering the cooling flow channel to affect the effective sectional area of the cooling circuit.
In an embodiment, a liquid draining groove is further defined between the cooling plate and the bottom plate, a liquid draining hole communicated with the liquid draining groove is formed in the bottom plate, and the liquid draining groove is located outside the cooling flow channel.
When the connection between the cooling plate and the bottom plate is unreliable to cause the cooling flow channel to be sealed not tightly, the cooling medium can pass through the liquid discharge groove outside the cooling flow channel along the process of leaking to the frame between the cooling plate and the bottom plate, so that the cooling medium enters into the liquid discharge groove and is discharged to the outside of the battery box through the liquid discharge hole, and the risk that the cooling medium leaks to one side, close to the battery unit, of the cooling plate from between the cooling plate and the frame is reduced.
In an embodiment, the battery box further comprises a first liquid blocking rib arranged on the bottom plate;
The first liquid blocking rib is positioned between the cooling flow channel and the frame, and one end of the first liquid blocking rib, which is opposite to the bottom plate, is in sealing abutting connection with the cooling plate;
The liquid draining groove is located between the first liquid blocking rib and the frame.
One end of the first liquid blocking rib, which is opposite to the bottom plate, is abutted with the cooling plate and attached to the cooling plate, so that the one end of the first liquid blocking rib, which is opposite to the bottom plate, is in sealing fit with the cooling plate, and the cooling flow channel and the liquid draining groove can be isolated through the first liquid blocking rib. In this way, the sealing property against the cooling flow passage is enhanced. Even if the cooling medium leaks in the cooling flow channel, the cooling medium can be blocked to a certain extent through the first liquid blocking rib, and the risk that the cooling medium flows to the frame after crossing between the first liquid blocking rib and the cooling plate is reduced.
In one embodiment, the battery box further comprises a second liquid blocking rib arranged on the bottom plate, wherein the second liquid blocking rib is positioned between the first liquid blocking rib and the frame, and one end, facing away from the bottom plate, of the second liquid blocking rib is in sealing abutting connection with the cooling plate;
The second liquid blocking ribs and the first liquid blocking ribs are arranged at intervals to define the liquid discharge groove;
And a bonding part for bonding the bottom plate and the cooling plate is arranged between the second liquid blocking rib and the frame.
One end of the second liquid blocking rib, which is opposite to the bottom plate, is abutted with the cooling plate and attached to the cooling plate, so that the one end of the second liquid blocking rib, which is opposite to the bottom plate, is in sealing fit with the cooling plate. After the cooling medium enters the liquid discharge groove, the sealing fit between one end of the second liquid blocking rib, which is opposite to the bottom plate, and the cooling plate can further block the cooling medium from flowing to the frame, so that the cooling medium is further reduced from entering one side, close to the battery cells, of the cooling plate between the cooling plate and the frame.
The bonding part between the second liquid blocking rib and the frame further bonds the bottom plate and the cooling plate, so that the connection reliability of the bottom plate and the cooling plate can be enhanced, and the sealing performance of the cooling flow channel is enhanced. And after the cooling medium enters the liquid discharge groove, the bonding part between the second liquid blocking rib and the frame can be used for blocking the cooling medium from flowing to the frame, so that the risk that the cooling medium enters the side, close to the battery cells, of the cooling plate from the cooling plate to the frame is further reduced.
In one embodiment, a reinforcing rib structure is arranged on one side of the bottom plate, which is away from the cooling plate;
the reinforcing rib structure comprises a plurality of reinforcing ribs which are arranged at intervals along a first direction and a plurality of reinforcing ribs which are arranged at intervals along a second direction;
wherein the first direction intersects the second direction.
The plurality of reinforcing ribs arranged at intervals along the first direction and the plurality of reinforcing ribs arranged at intervals along the second direction are mutually intersected to form a grid-shaped reinforcing rib structure, so that the bearing strength of the bottom plate can be effectively enhanced.
In a second aspect, the present application provides an electric device, including the battery device, where the battery device is configured to provide electric energy for the electric device.
Above-mentioned consumer, its battery device's battery monomer can set up on the cooling plate. Because the cooling flow channel is defined between the cooling plate and the bottom plate, heat generated by the battery cells can be transferred to the cooling medium in the cooling flow channel through the cooling plate, so that the heat is taken away in the flowing process of the cooling medium, and the heat dissipation effect on the battery cells is achieved. Therefore, the battery box provided by the embodiment of the application utilizes the bottom plate of the box body and the cooling plate to jointly define the cooling flow channel, so that two layers of cooling plates are not required to be used for defining the cooling flow channel, one layer of cooling plate can be omitted, the thickness of the cooling plate can be reduced, the weight of the cooling plate can be reduced, and the weight of the battery device can be further reduced.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
Fig. 1 is a schematic structural view of a vehicle according to some embodiments of the present application.
Fig. 2 is an exploded view of a battery according to some embodiments of the present application.
Fig. 3 is an exploded view of a battery cell according to some embodiments of the present application.
Fig. 4 is a schematic view illustrating a connection structure of a case body and a cooling plate of a battery case according to some embodiments of the present application.
Fig. 5 is an exploded view showing a connection structure of the case and the cooling plate shown in fig. 4.
Fig. 6 is a top view of the case shown in fig. 5.
Fig. 7 is a side view of a connection structure of the case and the cooling plate shown in fig. 4.
FIG. 8 is a schematic A-A section view of the connection structure of the case and the cooling plate shown in FIG. 7.
Fig. 9 is a top view of the connection structure of the case and the cooling plate shown in fig. 4.
FIG. 10 is a schematic view of section B-B of the connection structure of the tank and the liquid cooling plate shown in FIG. 9.
Fig. 11 is a partial enlarged view of the area a in fig. 10.
Fig. 12 is a schematic view showing a structure of the connection structure of the case and the cooling plate shown in fig. 4 from another view angle.
Reference numerals in the specific embodiments are as follows:
XX ', first direction, YY', second direction;
1000-vehicle;
1100-battery device, 1110-battery box, 1111-box, 1112-upper cover, 1120-battery cell, 1121-end cover, 1121 a-electrode terminal, 1122-shell, 1123-cell assembly;
1200-controller;
1300-motor;
100. a sidewall;
200. A bottom plate; 210, cooling flow channels, 211, flow channel sections, 212 and communication sections;
300. A liquid cooling plate;
400. A bonding layer;
500. A first glue blocking dam;
600. 601, a glue overflow groove;
710. The device comprises a first liquid blocking rib, 720 parts of a second liquid blocking rib, 701 parts of liquid discharging holes, 702 parts of liquid discharging grooves;
800. reinforcing ribs.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, 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 for the purpose of describing particular embodiments only and are not intended to be limiting of the application, and the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the above description of the drawings are intended to cover non-exclusive inclusions.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B, and may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by 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", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "fixed" and the like are to be construed broadly and include, for example, fixed connection, detachable connection, or integral therewith, mechanical connection, electrical connection, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
Currently, the battery device is more widely used in view of the development of market situation. The battery device is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of battery devices, the market demand of the battery devices is also continuously expanding.
The battery device generally comprises a battery box and a battery unit, wherein the battery unit is arranged in the battery box. In the related art, a heat dissipation scheme of a battery device is generally that a liquid cooling plate with good heat conductivity is arranged at the bottom of a battery box, and a battery unit is placed on the liquid cooling plate. The liquid cooling plate in the general battery device comprises two layers of plates which are opposite and fixedly connected, namely a liquid cooling upper plate and a liquid cooling lower plate, wherein a cooling flow passage is defined between the liquid cooling upper plate and the liquid cooling lower plate and is used for cooling medium to circulate, so that heat can be dissipated to the battery unit through the liquid cooling plate. Such a liquid cooling plate requires two layers of plates, and is thick and heavy, resulting in a heavy battery device.
Based on the above consideration, in order to solve the problem that the heat dissipation scheme adopted by the battery device in the related art causes the heavy weight of the battery device, the application designs the battery device, wherein the battery box of the battery device utilizes the bottom plate of the box body and the cooling plate to jointly define the cooling flow channel, so that two layers of liquid cooling plates are not required to be used for limiting the cooling flow channel, 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.
The battery device disclosed by the embodiment of the application can be used in electric equipment such as vehicles, ships or aircrafts, but is not limited to the electric equipment. In particular, the powered device may be, but is not limited to, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy may include fixed or mobile electric toys, for example, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like. The battery device disclosed by the application is used for forming the power supply system of the electric equipment, so that the weight of the battery device can be reduced.
For convenience of description, the following embodiments take a powered device according to some embodiments of the present application as an example of the vehicle 1000.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery device 1100 may be used for power supply of the vehicle 1000, for example, the battery device 1100 may serve as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, the controller 1200 being configured to control the battery device 1100 to power the motor 1300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.
In some embodiments of the present application, the battery device 1100 may be used not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1000.
Referring to fig. 2, fig. 2 is an exploded view of a battery according to some embodiments of the present application. The battery device 1100 includes a battery case 1110 and a battery cell 1120. The battery cell 1120 is accommodated in the battery case 1110. The battery case 1110 is used to provide a receiving space for the battery unit 1120, and may have various structures. In some embodiments, the battery case 1110 may include an upper cover 1112 and a case 1111, where the upper cover 1112 and the case 1111 are mutually covered, and the upper cover 1112 and the case 1111 together define a receiving chamber for receiving the battery cell 1120. The case 1111 may have a hollow structure with one end opened, the upper cover 1112 may have a plate structure, and the upper cover 1112 covers the opening side of the case 1111 so that the upper cover 1112 and the case 1111 together define a receiving chamber, and the upper cover 1112 and the case 1111 may have hollow structures with one side opened, and the opening side of the upper cover 1112 covers the opening side of the case 1111. Of course, the battery case 1110 formed by the upper cover 1112 and the case 1111 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.
In the battery device 1100, the plurality of battery cells 1120 may be plural, and the plurality of battery cells 1120 may be connected in series or parallel or in series-parallel, and the series-parallel refers to that the plurality of battery cells 1120 are connected in both series and parallel. The plurality of battery units 1120 can be directly connected in series or parallel or in parallel-series connection, and then the whole formed by the plurality of battery units 1120 is accommodated in the battery box 1110, however, the battery device 1100 can also be in a form of a battery module formed by connecting the plurality of battery units 1120 in series or parallel or in series-series connection, and then the plurality of battery modules are connected in series or parallel or in series-series connection to form a whole and are accommodated in the battery box 1110. The battery device may also include other structures, for example, the battery device may also include a bus member for making electrical connection between the plurality of battery cells 1120.
Each of the battery cells 1120 may be a secondary battery or a primary battery, and may be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 1120 may be cylindrical, flat, rectangular, or other shape, etc.
Referring to fig. 3, fig. 3 shows an exploded view of the battery cell 1120 shown in fig. 2. The battery cell 1120 refers to the smallest unit constituting the battery device 1100. As shown in fig. 3, the battery cell 1120 includes an end cap 1121, a housing 1122, a cell assembly 1123, and other functional components.
The end cap 1121 refers to a member that is capped at the opening of the case 1122 to isolate the internal environment of the battery cell 1120 from the external environment. Without limitation, the shape of end cap 1121 may conform to the shape of housing 1122 to mate with housing 1122. Alternatively, the end cover 1121 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 1121 is not easy to deform when being extruded and collided, so that the battery unit 1120 can have a higher structural strength, and the safety performance can be improved. The end cap 1121 may be provided with functional components such as electrode terminals 1121 a. The electrode terminal 1121a may be used to be electrically connected with the cell assembly 1123 for outputting or inputting electric energy of the battery cell 1120. In some embodiments, a pressure relief mechanism may also be provided on the end cap 1121 for relieving the internal pressure of the battery cell 1120 when the internal pressure or temperature reaches a threshold. The material of the end cap 1121 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, an insulating structure may also be provided on the inside of end cap 1121, which may be used to isolate electrical connection components within housing 1122 from end cap 1121 to reduce the risk of short circuits. By way of example, the insulating structure may be plastic, rubber, or the like.
The housing 1122 is an assembly for mating with the end cap 1121 to form the internal environment of the battery cell 1120, wherein the formed internal environment may be used to house the cell assembly 1123, electrolyte, and other components. The housing 1122 and the end cap 1121 may be separate components and an opening may be provided in the housing 1122 to create the interior environment of the cell 1120 by closing the end cap 1121 at the opening. The end cover 1121 and the housing 1122 may be integrated, and specifically, the end cover 1121 and the housing 1122 may be formed with a common connection surface before other components are put into the housing, and the end cover 1121 may be closed to the housing 1122 when it is necessary to seal the inside of the housing 1122. The housing 1122 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 1122 may be determined based on the specific shape and size of the cell assembly 1123. The material of the housing 1122 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.
The cell assembly 1123 is the component of the battery cell 1120 where the electrochemical reaction occurs. One or more battery cell assemblies 1123 may be contained within the housing 1122. The cell assembly 1123 is mainly formed by laminating a composite material tape 400, and the composite material tape 400 is formed by thermally compounding a positive electrode sheet, a negative electrode sheet, and a separator provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body of the cell assembly 1123, and the portions of the positive and negative electrode sheets having no active material constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery device 1100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected to the electrode terminal 1121a to form a current loop.
Referring to fig. 4 to 6, fig. 4 is a schematic diagram showing a connection structure of a case body and a cooling plate of a battery case according to some embodiments of the present application. Fig. 5 shows an exploded view of the connection structure of the case and the cooling plate shown in fig. 4. Fig. 6 shows a top view of the case of fig. 5.
The battery device comprises a battery cell and a battery box. The box includes the frame and sets up in the bottom plate 200 of frame one side, and the accommodation space is defined to frame and bottom plate 200, and battery monomer holding is in the accommodation space. The cooling plate 300 is disposed in the receiving space, a cooling flow passage 210 through which a cooling medium flows is defined between the cooling plate 300 and the bottom plate 200, and the cooling plate 300 supports the battery cells.
The battery cells may be disposed on the cooling plate 300 such that the battery cells may be cooled by the cooling plate 300. Since the cooling flow channel 210 for the cooling medium to circulate is defined between the cooling plate 300 and the bottom plate 200, the heat generated by the battery cells can be transferred to the cooling medium in the cooling flow channel 210 through the cooling plate 300, so that the heat is taken away in the flowing process of the cooling medium, and the heat dissipation effect on the battery cells is achieved.
The liquid inlet connector and the liquid outlet connector can be respectively communicated with the cooling flow channel 210, so that cooling medium can be introduced into the cooling flow channel 210 through the liquid inlet connector, and the cooling medium can flow out of the cooling flow channel 210 through the liquid outlet connector. The liquid inlet connector may be provided to the bottom plate 200 or the cooling plate 300. The outlet connection may be provided to the bottom plate 200 or the cooling plate 300.
In the battery device provided by the embodiment of the application, the battery cells may be disposed on the cooling plate 300. Since the cooling flow channel 210 is defined between the cooling plate 300 and the bottom plate 200, heat generated by the battery cells can be transferred to the cooling medium in the cooling flow channel 210 through the cooling plate 300, so that the heat is taken away in the flowing process of the cooling medium, and the heat dissipation effect on the battery cells is achieved. Therefore, in the battery device provided by the embodiment of the application, the cooling flow channel 210 is defined by the bottom plate 200 of the box body and the cooling plate 300, so that the cooling flow channel is not limited by two layers of liquid cooling plates, and one layer of liquid cooling plate can be omitted, the thickness of the liquid cooling plate can be reduced, the weight of the liquid cooling plate can be reduced, and the weight of the battery device can be further reduced.
The following description is made with respect to a specific structure of the battery device.
Specifically, the base plate 200 is connected to one end of the frame, and the frame is circumferentially disposed around the base plate 200, so that the frame and the base plate 200 define the above-mentioned accommodating space to accommodate the battery cells. As shown in fig. 4 and 5, the frame may include a plurality of side walls 100 connected end to end in sequence, and the plurality of side walls 100 are respectively connected with respective sides of the base plate 200 in the circumferential direction, so that the frame may be circumferentially disposed along the base plate 200. In the embodiment shown in fig. 4 and 5, the rim includes four sidewalls 100 and the bottom plate 200 is quadrangular. Of course, the bottom plate 200 may also be other polygons, and the number of the side walls in the frame may also be three, five, etc., where the sides of the polygonal bottom plate 200 correspond to the number of the side walls in the frame. The bottom plate can also be a round bottom plate, the frame can also be a round side wall, and the frame can also be that two semicircular side walls are connected end to end.
The cooling plate 300 is located in the surrounding space of the frame, i.e. in the accommodating space. The battery cells may be disposed on the cooling plate 300 such that the battery cells may be cooled by the cooling plate 300.
Referring to fig. 4 to 6, in an embodiment, a flow channel groove for forming a cooling flow channel 210 is formed on a bottom plate 200. The cooling plates 300 are stacked on the base plate 200 and cover the flow channel grooves such that the cooling channels 210 are defined between the cooling plates 300 and the base plate 200.
In the embodiment shown in fig. 5, the flow channel grooves are recessed from one side of the bottom plate 200 facing the cooling plate 300 to the other side, so that the side of the flow channel grooves near 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 sides of the flow channel grooves on the base plate 200, so that the cooling flow channels 210 are defined 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.
In other embodiments, a flow channel groove for cooling medium to circulate may be formed on a side of the cooling plate 300 facing the bottom plate 200, and the flow channel groove is recessed from a side of the cooling plate 300 facing the bottom plate 200 to the other side, so that a side of the flow channel groove adjacent to the bottom plate 200 is open. By stacking the cooling plate 300 and the base plate 200, the base plate 200 may cover the open sides of the flow channel grooves on the cooling plate 300, thereby defining cooling flow channels between the cooling plate 300 and the base plate 200.
Alternatively, a first channel for cooling medium to circulate may be formed on the bottom plate 200, and the first channel is recessed from one side of the bottom plate 200 facing the cooling plate 300 to the other side, such that a side of the first channel adjacent to the cooling plate 300 has a first opening, and a second channel for cooling medium to circulate is formed on one side of the cooling plate 300 facing the bottom plate 200, and the second channel is recessed from one side of the cooling plate 300 facing the bottom plate 200 to the other side, such that a side of the second channel adjacent to the bottom plate 200 has a second opening. The first opening and the second opening are the same in shape and correspond to each other in position. The cooling plate 300 is stacked on the bottom plate 200, and the cooling plate 300 and the bottom plate 200 cover the open sides of the first flow channel groove and the second flow channel groove with each other so that the first flow channel groove and the second flow channel groove can enclose a cooling flow channel.
In some embodiments, the material density of the cooling plate 300 is greater than the material density of the base plate 200.
Base 200 may be made of a non-metallic material, such as plastic. Specifically, the base plate 200 may be made of glass fiber reinforced plastic or the like. The glass fiber reinforced plastic has light weight, high specific strength, corrosion resistance and good electrical insulation property. The cooling plate 300 may be made of metal, such as aluminum, copper, etc. The metal material has good thermal conductivity, so that the cooling plate 300 using the metal material can rapidly and effectively transfer heat generated from the battery cells to the cooling medium in the cooling flow channel 210.
By employing the lower-density base plate 200, the weight of the battery case can be further reduced, thereby further reducing the weight of the battery device. Meanwhile, the cooling plate 300 has a relatively high material density, so that the battery cells can be reliably supported.
In some embodiments, the bezel is an integrally formed structure with the chassis 200.
Base 200 may be made of a non-metallic material such as plastic. The base plate 200 may be made of glass fiber reinforced plastic or the like. The frame and the bottom plate 200 can be processed into an integrally formed structure by integral injection molding and the like. The frame and the base plate 200 may be made of the same material or different materials.
The frame and the bottom plate 200 are of an integrated structure, and the frame and the bottom plate 200 are not required to be respectively formed and connected, so that the processing and the assembly of the box body are convenient.
Referring to fig. 5 to 8, fig. 5 shows an exploded view of the connection structure of the case and the cooling plate shown in fig. 4. Fig. 6 shows a top view of the case of fig. 5. Fig. 7 is a side view showing a connection structure of the case and the cooling plate shown in fig. 4. FIG. 8 shows a schematic A-A section of the connection structure of the box and the cooling plate shown in FIG. 7.
In some embodiments, the cooling flow channel 210 includes a plurality of flow channel segments 211 and a plurality of communication segments 212 that are sequentially spaced apart. Of any adjacent three-section flow path sections 211, both ends of the flow path section 211 located in the middle are respectively communicated with the adjacent two flow path sections 211 through corresponding communication sections 212.
Specifically, the spacing direction of the plurality of flow channel segments 211 along the first direction may be XX' in fig. 4-6 and 8. The extending direction of the flow path section 211 may be the YY' direction in fig. 4 to 6 and 8 along the second direction. The first direction XX 'intersects the second direction YY'. Alternatively, the first direction XX 'is perpendicular to the second direction YY'. Alternatively, the second direction YY 'is along the length direction of the bottom plate 200, and the first direction XX' is along the width direction of the bottom plate 200.
In any adjacent three-section runner section 211, two ends of the runner section 211 positioned in the middle are respectively provided with a communication section 212. The communication section 212 at one end of the middle flow path section 211 communicates with the end of the adjacent one of the flow path sections 211, and the communication section 212 at the other end of the middle flow path section 211 communicates with the end of the adjacent other flow path section 211, so that the cooling flow path 210 forms a repeatedly bent structure. Alternatively, the extending direction of the communication section 212 is arc-shaped.
In other embodiments, the extending direction of the cooling flow channel may also take other forms in the prior art, which will not be described in detail.
Referring to fig. 5 to 8, in some embodiments, the battery box further includes an adhesive layer 400 and a first dam 500 disposed on the bottom plate 200. The first glue blocking dam 500 is disposed on the bottom plate 200, and the first glue blocking dam 500 surrounds the cooling flow channel 210 along the circumferential contour of the cooling flow channel 210.
The cooling plate 300 is adhered to the bottom plate 200 by means of the adhesive layer 400, and the adhesive layer 400 is located outside the enclosed area of the first dam 500.
Specifically, the first dam 500 is disposed around the cooling flow channel 210 along the circumferential contour of the cooling flow channel 210, so that the shape of the dam enclosed by the first dam 500 is similar to the contour of the cooling flow channel 210, and the first dam 500 can enclose the cooling flow channel 210. The first glue blocking dam 500 is disposed on a side of the bottom plate 200 facing the cooling plate 300, and the first glue blocking dam 500 protrudes from the bottom plate 200, so that the first glue blocking dam 500 can block the adhesive layer 400 outside an enclosed area thereof.
By arranging the first glue blocking dam 500 on the bottom plate 200, the first glue blocking dam 500 is arranged on the cooling flow channel 210 along the outer periphery of the cooling flow channel 210, so that the adhesive layer 400 can be blocked outside the area surrounded by the first glue blocking dam 500, namely, the adhesive layer 400 is blocked outside the cooling flow channel 210 through the first glue blocking dam 500, and further, the adhesive layer 400 can be prevented from entering the cooling flow channel 210 to affect the effective sectional area of the cooling circuit as much as possible.
Referring to fig. 5 to 8, in some embodiments, the battery box further includes a second glue dam 600 disposed on the bottom plate 200, and the second glue dam 600 surrounds the cooling flow channel 210 along a circumferential contour of the cooling flow channel 210. The second dam 600 is located at a side of the first dam 500 near the cooling flow path 210. The second glue retaining dam 600 and the first glue retaining dam 500 are disposed at intervals to define a glue overflow groove 601.
Specifically, the second glue retaining dam 600 is disposed around the cooling flow channel 210 along the circumferential contour of the cooling flow channel 210, so that the shape of the second glue retaining dam 600 is similar to the contour of the cooling flow channel 210, and the second glue retaining dam 600 can enclose the cooling flow channel 210. Since the second glue blocking dam 600 is located at a side of the first glue blocking dam 500 close to the cooling flow channel 210, that is, the second glue blocking dam 600 is located between the first glue blocking dam 500 and the cooling flow channel 210, the first glue blocking dam 500 is surrounded on the periphery of the second glue blocking dam 600. The overflow groove 601 formed by the interval space between the second blocking dam 600 and the first blocking dam 500 is provided along the outer circumference of the cooling flow passage 210 in the cooling flow passage 210. The second glue blocking dam 600 is disposed on a side of the bottom plate 200 facing the cooling plate 300, and the second glue blocking dam 600 protrudes from the bottom plate 200, so that the second glue blocking dam 600 can further block the adhesive layer 400 outside the enclosed area.
When the adhesive layer 400 is arranged outside the area surrounded by the first glue blocking dam 500, if the adhesive amount is too large, the adhesive layer 400 can overflow into the overflow groove 601 between the first glue blocking dam 500 and the second glue blocking dam 600 beyond the first glue blocking dam 500. On the one hand, the situation that the adhesive layer between the cooling plate 300 and the bottom plate 200 is too thick can be reduced, and on the other hand, when too much adhesive layer 400 overflows into the adhesive overflow groove 601, the adhesive layer 400 can be further blocked outside the cooling flow channel 210 through the second adhesive blocking dam 600, so that the adhesive layer 400 can be further blocked from entering the cooling flow channel 210 to influence the effective sectional area of the cooling circuit.
Referring to fig. 9 to 11, fig. 9 is a plan view showing a connection structure of the case and the cooling plate shown in fig. 4. Fig. 10 is a schematic B-B sectional view showing a connection structure of the case and the cooling plate shown in fig. 9. Fig. 11 shows a partial enlarged view of the area a in fig. 10.
In some embodiments, the second dam 600 protrudes above the bottom plate 200, and is higher than the first dam 500 protrudes above the bottom plate 200.
Since the protruding height of the second glue blocking dam 600 is higher than that of the first glue blocking dam 500, the blocking height of the second glue blocking dam 600 to the adhesive layer 400 is higher than that of the first glue blocking dam 500, and the difficulty for the adhesive layer 400 to enter the cooling flow channel 210 is further improved.
Even when the adhesive amount of the adhesive layer 400 is too large so as to overflow into the adhesive overflow groove 601 beyond the first adhesive blocking dam 500, the adhesive solution in the adhesive overflow groove 601 can be sufficiently and effectively blocked outside the cooling flow channel 210 by the second adhesive blocking dam 600.
Referring to fig. 9 to 11, in some embodiments, the cooling plate 300 is in sealing contact with an end of the second dam 600 facing away from the base plate 200.
Through the abutting connection of the cooling plate 300 and one end of the second glue blocking dam 600, which is opposite to the bottom plate 200, the limiting effect on the cooling plate 300 can be achieved, namely, the distance between the cooling plate 300 and the bottom plate 200 is limited, so that the thickness of the bonding layer 400 between the cooling plate 300 and the bottom plate 200 can be limited, and the thickness of the bonding layer 400 can be effectively controlled.
The cooling plate 300 is tightly attached to one end of the second glue blocking dam 600, which is opposite to the bottom plate 200, so that the cooling flow channel 210 can be sealed in the area surrounded by the second glue blocking dam 600, the bonding layer 400 is isolated outside the area surrounded by the second glue blocking dam 600, and the bonding layer 400 can be effectively prevented from entering the cooling flow channel 210 to affect the effective sectional area of the cooling circuit.
If the connection between the cooling plate 300 and the bottom plate 200 is unreliable, the cooling flow channel 210 is not tightly sealed, so that the cooling medium is easy to leak from between the cooling plate 300 and the bottom plate 200, and leak from between the cooling plate 300 and the side wall of the accommodating space to the side of the cooling plate 300 close to the battery cell, thereby affecting the insulation in the battery box and affecting the safety of the battery device. For this reason, referring to fig. 6, 8 and 11, in some embodiments, a drain groove 702 is defined between the cooling plate 300 and the bottom plate 200, and a drain hole 701 is formed in the bottom plate 200 and is in communication with the drain groove 702, and the drain groove 702 is located outside the cooling flow channel 210.
Specifically, the drain 702 may be disposed at any position outside the cooling flow passage 210. For example, the drain groove 702 may be disposed between the cooling flow channel 210 and any side wall of the frame, or the drain groove 702 may be circumferentially surrounding the cooling flow channel 210 along the bottom plate 200, that is, the drain groove 702 is located between the plurality of side walls 100 and the cooling flow channel 210. The drain groove 702 is located between the cooling plate 300 and the bottom plate 200, and thus, the surfaces of the cooling plate 300 and the bottom plate 200 facing each other are the opposite two groove walls of the drain groove 702, respectively.
When the cooling flow channel 210 is not tightly sealed due to unreliable connection between the cooling plate 300 and the bottom plate 200, the cooling medium passes through the drain groove 702 outside the cooling flow channel 210 in the process of leaking to the side wall of the accommodating space between the cooling plate 300 and the bottom plate 200, and then enters the drain groove 702, and is discharged to the outside of the battery box through the drain hole 701, so that the risk that the cooling medium leaks to one side of the cooling plate 300 close to the battery cell from between the cooling plate 300 and the side wall of the accommodating space is reduced.
Referring to fig. 9 to 11, in some embodiments, the battery box further includes a first liquid blocking rib 710 disposed on the bottom plate 200. The first liquid blocking rib 710 is located between the cooling flow channel 210 and the side wall of the accommodating space, and one end of the first liquid blocking rib 710 facing away from the bottom plate 200 is in sealing contact with the cooling plate 300. The drain groove 702 is located between the first liquid blocking rib 710 and the frame.
Specifically, the first liquid blocking rib 710 may be disposed at any position between the cooling flow channel 210 and the rim. For example, the first liquid blocking rib 710 is disposed between the cooling flow channel 210 and any side wall of the frame, and the liquid drain groove 702 is located between the first liquid blocking rib 710 and any side wall of the frame. The first liquid blocking rib 710 may be circumferentially surrounding the cooling flow channel 210 along the bottom plate 200, and the liquid drain groove 702 may also circumferentially surrounding the cooling flow channel 210 along the bottom plate 200. The first rib 710 may be a groove wall of the drain groove 702.
The end of the first liquid blocking rib 710, which is away from the bottom plate 200, is abutted against and attached to the cooling plate 300, so that the end of the first liquid blocking rib 710, which is away from the bottom plate 200, is in sealing fit with the cooling plate 300, and the cooling flow channel 210 can be isolated from the liquid drain groove 702 through the first liquid blocking rib 710. In this way, the sealing performance against the cooling flow passage 210 is enhanced. Even if the cooling medium leaks in the cooling flow channel 210, the cooling medium can be blocked to a certain extent by the first liquid blocking rib 710, so that the risk that the cooling medium flows to the frame beyond the space between the first liquid blocking rib 710 and the cooling plate 300 is reduced.
Of course, even if the cooling medium passes between the first rib 710 and the cooling plate 300 and flows to the frame, the cooling medium first passes through the drain groove 702, and can be discharged to the outside of the battery case through the drain groove 702 and the drain hole 701.
Referring to fig. 9 to 11, in some embodiments, the first liquid blocking rib 710 is located between the first glue dam 500 and the frame. The first liquid blocking rib 710 is spaced apart from the first glue blocking dam 500, so that the adhesive layer 400 can be disposed between the first liquid blocking rib 710 and the first glue blocking dam 500. The first glue blocking dam 500 can block the adhesive layer 400 from entering the liquid discharge groove 702, so that the liquid discharge groove 702 can have sufficient liquid discharge space as much as possible.
Referring to fig. 9 to 11, in some embodiments, the battery box further includes a second liquid blocking rib 720 disposed on the bottom plate 200. The second liquid blocking rib 720 is located between the first liquid blocking rib 710 and the frame, and one end of the second liquid blocking rib 720, which is opposite to the bottom plate 200, is in sealing abutting connection with the cooling plate 300. The second liquid blocking rib 720 is spaced apart from the first liquid blocking rib 710 to define the liquid drain groove 702. A bonding portion 410 (for example, adhesive) for bonding the bottom plate 200 and the cooling plate 300 is provided between the second liquid blocking rib 720 and the frame.
Specifically, the second liquid blocking rib 720 and the first liquid blocking rib 710 are two opposite groove walls of the liquid drain groove 702. The second liquid blocking rib 720 extends in a similar direction and shape to the first liquid blocking rib 710. For example, when the first liquid blocking rib 710 is disposed between the cooling flow channel 210 and any one of the side walls of the frame, the second liquid blocking rib 720 is located between the first liquid blocking rib 710 and any one of the side walls of the frame. When the first liquid blocking rib 710 surrounds the cooling flow channel 210 along the circumferential direction of the bottom plate 200, the second liquid blocking rib 720 surrounds the first liquid blocking rib 710 along the circumferential direction of the bottom plate 200.
The end of the second liquid blocking rib 720, which is away from the bottom plate 200, is abutted against and attached to the cooling plate 300, so that the end of the second liquid blocking rib 720, which is away from the bottom plate 200, is in sealing fit with the cooling plate 300. After the cooling medium enters the drain groove 702, the sealing fit between the end of the second liquid blocking rib 720, which is opposite to the bottom plate 200, and the cooling plate 300 can further block the cooling medium from flowing to the frame, so that the cooling medium is further reduced from entering the side, close to the battery cells, of the cooling plate 300 between the cooling plate 300 and the frame.
The bonding portion 410 between the second liquid blocking rib 720 and the frame further bonds the bottom plate 200 and the cooling plate 300, so that the connection reliability of the bottom plate 200 and the cooling plate 300 can be enhanced, and the sealing performance of the cooling flow channel 210 can be enhanced. Moreover, after the cooling medium enters the drain groove 702, the bonding portion 410 between the second liquid blocking rib 720 and the frame may be used to block the cooling medium from flowing to the frame, thereby further reducing the risk that the cooling medium enters the side of the cooling plate 300 close to the battery cell from between the cooling plate 300 and the frame.
In one embodiment, the number of drain holes 701 is multiple. The plurality of drain holes 701 are arranged at intervals along the extending direction of the drain groove 702, so that the cooling medium in the drain groove 702 can be rapidly discharged from the drain holes 701. A plurality of drain holes 701 may be circumferentially provided around the bottom plate 200.
Referring to fig. 12, fig. 12 is a schematic view showing another view of the connection structure of the case and the cooling plate shown in fig. 4. In one embodiment, the side of the base plate 200 facing away from the cooling plate 300 is provided with a reinforcing rib structure. The reinforcing rib structure includes a plurality of reinforcing ribs 800 arranged at intervals along the first direction and a plurality of reinforcing ribs 800 arranged at intervals along the second direction. The first direction intersects the second direction.
Specifically, the first direction may be the XX 'direction in fig. 12, and the second direction may be the YY' direction in fig. 12. Alternatively, the first direction XX 'is perpendicular to the second direction YY'. Alternatively, the second direction YY 'is along the length direction of the bottom plate 200, and the first direction XX' is along the width direction of the bottom plate 200.
Since the first direction intersects the second direction, the plurality of reinforcing ribs 800 disposed at intervals along the first direction and the plurality of reinforcing ribs 800 disposed at intervals along the second direction intersect each other to form a lattice-shaped reinforcing rib structure, thereby effectively enhancing the load bearing strength of the base plate 200.
The battery box provided by the embodiment of the application comprises a box body and a cooling plate 300. The box includes frame and bottom plate 200, and bottom plate 200 is connected with the one end of frame, and the circumference of frame along bottom plate 200 encircles the setting. The cooling plate 300 is disposed in the surrounding space of the frame, the cooling plate 300 is stacked and connected with the bottom plate 200, and a cooling flow passage 210 is defined between the cooling plate 300 and the bottom plate 200, and the cooling flow passage 210 is used for cooling medium circulation. The material density of the bottom plate 200 is less than that of the cooling plate 300. The battery box further comprises an adhesive layer 400, a first glue blocking dam 500 arranged on the bottom plate 200 and a second glue blocking dam 600 arranged on the bottom plate 200. The cooling plate 300 is bonded to the base plate 200 by an adhesive layer 400. The second dam 600 is disposed along the outer circumference of the cooling flow path 210 in the cooling flow path 210. The first glue blocking dam 500 is disposed around the second glue blocking dam 600 and spaced apart from the second glue blocking dam 600 to define a glue overflow groove 601. The adhesive layer 400 is disposed outside the area surrounded by the first dam 500. The second dam 600 protrudes above the bottom plate 200 to a height higher than that of the first dam 500. The cooling plate 300 is in sealing abutting connection with one end of the second glue blocking dam 600, which is back to the bottom plate 200. The battery box further includes a first liquid blocking rib 710 and a second liquid blocking rib 720 provided to the bottom plate 200. One end of the first liquid blocking rib 710 and one end of the second liquid blocking rib 720, which are opposite to the bottom plate 200, are respectively in sealing abutting connection with 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 the liquid drain groove 702. The bottom plate 200 is provided with a drain hole 701 communicating with a drain groove 702. A bonding portion 410 for bonding the bottom plate 200 and the cooling plate 300 is provided between the second liquid blocking rib 720 and the frame.
When the battery box provided by the embodiment of the application is applied to a battery device, the cooling flow channel 210 is defined by the bottom plate 200 of the box body and the cooling plate 300, so that the cooling flow channel is not limited by two layers of liquid cooling plates, one layer of liquid cooling plate can be omitted, and the weight of the battery device can be further reduced. By employing the lower density base plate 200, the weight of the battery case can be further reduced. And the cooling plate 300 has a relatively high material density so that the battery cells can be reliably supported. When the amount of the adhesive layer 400 arranged outside the area surrounded by the first adhesive barrier 500 is too large, the adhesive layer 400 can overflow into the overflow groove 601 beyond the first adhesive barrier 500. On the one hand, the situation that the adhesive layer between the cooling plate 300 and the bottom plate 200 is too thick can be reduced, and on the other hand, when the adhesive layer 400 overflows into the adhesive overflow groove 601, the adhesive layer 400 can be further blocked outside the cooling flow channel 210 through the second adhesive blocking dam 600. The cooling plate 300 is abutted with one end of the second glue blocking dam 600, which is opposite to the bottom plate 200, so that the distance between the cooling plate 300 and the bottom plate 200 can be limited, and the thickness of the adhesive layer 400 can be effectively controlled. The cooling plate 300 is in sealing fit with the second glue blocking dam 600, so that the adhesive layer 400 is isolated outside the area surrounded by the second glue blocking dam 600, and the adhesive layer 400 can be effectively blocked. When the cooling flow channel 210 is not tightly sealed due to unreliable connection between the cooling plate 300 and the bottom plate 200, the cooling medium passes through the liquid drain groove 702 outside the cooling flow channel 210 in the process of leaking to the frame between the cooling plate 300 and the bottom plate 200, so as to enter the liquid drain groove 702, and then is discharged to the outside of the battery box through the liquid drain hole 701, thereby reducing the risk of leakage of the cooling medium from between the cooling plate 300 and the frame to one side of the cooling plate 300 close to the battery cell. Through the sealed butt of second fender liquid muscle 720 and first fender liquid muscle 710 and the cooling plate 300 of the one end that is away from bottom plate 200, the bonding portion 410 between second fender liquid muscle 720 and frame can all further block cooling medium, reduces the risk that cooling medium gets into one side that cooling plate 300 is close to the battery cell from between cooling plate 300 and the frame.
The application also provides a battery device which comprises a battery unit and the battery box of any embodiment, wherein the battery unit is positioned in the battery box.
In the above battery device, the battery cells may be disposed on the cooling plate 300. Since the cooling flow channel 210 is defined between the cooling plate 300 and the bottom plate 200, heat generated by the battery cells can be transferred to the cooling medium in the cooling flow channel 210 through the cooling plate 300, so that the heat is taken away in the flowing process of the cooling medium, and the heat dissipation effect on the battery cells is achieved. Therefore, the battery box provided by the embodiment of the application utilizes the bottom plate 200 of the box body and the cooling plate 300 to jointly define the cooling flow channel 210, so that two layers of liquid cooling plates are not required to be used for defining the cooling flow channel, one layer of liquid cooling plate can be omitted, the thickness of the liquid cooling plate can be reduced, the weight of the liquid cooling plate can be reduced, and the weight of the battery device can be further reduced.
The application also provides electric equipment, which comprises the battery device of any embodiment, wherein the battery device is used for providing electric energy for the electric equipment.
The battery unit of the battery device of the electric device may be disposed on the cooling plate 300. Since the cooling flow channel 210 is defined between the cooling plate 300 and the bottom plate 200, heat generated by the battery cells can be transferred to the cooling medium in the cooling flow channel 210 through the cooling plate 300, so that the heat is taken away in the flowing process of the cooling medium, and the heat dissipation effect on the battery cells is achieved. Therefore, the battery box provided by the embodiment of the application utilizes the bottom plate 200 of the box body and the cooling plate 300 to jointly define the cooling flow channel 210, so that two layers of liquid cooling plates are not required to be used for defining the cooling flow channel, one layer of liquid cooling plate can be omitted, the thickness of the liquid cooling plate can be reduced, the weight of the liquid cooling plate can be reduced, and the weight of the battery device can be further reduced.
It should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit the technical solution of the present application, and although the detailed description of the present application is given with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application, and all the modifications or substitutions are included in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (14)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422959099.XU CN223797387U (en) | 2024-12-02 | 2024-12-02 | Battery device and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422959099.XU CN223797387U (en) | 2024-12-02 | 2024-12-02 | Battery device and electric equipment |
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| CN223797387U true CN223797387U (en) | 2026-01-13 |
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