WO2023160111A1

WO2023160111A1 - Battery and electric device

Info

Publication number: WO2023160111A1
Application number: PCT/CN2022/137255
Authority: WO
Inventors: 曹根; 周严东; 黄银成; 沈圳
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-02-25
Filing date: 2022-12-07
Publication date: 2023-08-31
Also published as: CN217114537U

Abstract

Disclosed in the present application are a battery (1100) and an electric device. The battery (1100) comprises a battery cell (100) and a cooling plate (200), wherein a cooling channel (210) is provided in the cooling plate (200); at least two bending portions (220), which are parallel to each other, are arranged on the cooling plate (200); the cooling plate (200) is bent along the bending portions (220), so as to form at least one U-shaped groove (230); the U-shaped groove (230) is used for accommodating the battery cell (100); and the bending portions (220) are provided with rigidity-weakening structures for weakening the rigidity of the cooling plate (200) at the bending portions (220).

Description

A battery and an electrical device

This application claims the priority of the Chinese patent application with the application number 202220402615.7 and the title of the invention "a battery and an electrical device" filed at the China Patent Office on February 25, 2022, the entire contents of which are incorporated herein by reference. Applying.

technical field

The present application relates to the field of battery technology, and more specifically, to a battery and an electrical device.

Background technique

With the rise of electric vehicles, the battery of electric vehicles has become one of the important indicators to measure the performance of vehicles. Because the battery is usually arranged inside the car, and the battery packs that make up the battery are arranged densely, the heat generated by the battery is relatively serious. Especially in the fast charging state, the temperature of the battery will be higher.

In order to solve the heat dissipation problem of the battery, there are currently two mainstream solutions of air cooling and water cooling. Because the heat dissipation efficiency of the water cooling method is higher, more and more electric vehicles tend to use the water cooling method to dissipate heat from the battery. However, the battery water-cooling solution in the prior art, while improving the uniformity of heat dissipation, will cause the problem of complex structure and difficult production process.

Contents of the invention

One of the purposes of the embodiments of the present application is to provide a battery and an electrical device to solve the technical problem that the battery water-cooling scheme in the related art can improve the uniformity of heat dissipation while causing a complex structure and increasing the difficulty of the production process.

In order to solve the above-mentioned technical problems, the technical solution adopted in the embodiment of the present application is:

In a first aspect, the present application provides a battery, including: a battery cell; a cooling plate, a cooling channel is provided inside the cooling plate, at least two mutually parallel bending parts are arranged on the cooling plate, and the cooling plate is arranged along the bending part At least one U-shaped groove is formed by bending, and the U-shaped groove is used for accommodating the battery cells; wherein, the bending part is provided with a rigidity weakening structure to weaken the rigidity of the cooling plate at the bending part.

The embodiment of the present application includes a battery cell and a cooling plate, and a cooling channel is provided inside the cooling plate, and the cooling channel is used for a medium to pass through, so as to realize the thermal management function of the battery. Moreover, at least two mutually parallel bending parts are provided on the cooling plate, so that the cooling plate can be bent along the bending parts to form at least one U-shaped groove, the U-shaped groove accommodates the battery cells on the one hand, and on the other hand This enables the cooling plate to contact more surfaces of the battery cells, correspondingly allowing the medium in the cooling channel to pass through more surfaces of the battery cells, and finally achieves the purpose of improving the uniformity of heat dissipation of the battery cells. Among them, the rigidity weakening structure provided on the bending part reduces the rigidity of the bending part and facilitates bending, so that the cooling plate with U-shaped grooves can be made of the whole plate, which improves the overall structural strength of the battery product while reducing the While the production process is difficult, it is beneficial to improve production efficiency.

In some embodiments, the thickness of the bent portion is smaller than that of the cooling plate, so as to form a rigid weakening structure.

By reducing the thickness of the bent part, the rigidity of the bent part is reduced to facilitate bending of the bent part, thereby reducing the difficulty of processing the bent part.

In some embodiments, the side of the bent portion close to the battery cell is provided with a first concave portion that is recessed away from the battery cell, so as to reduce the thickness of the bent portion.

Based on the purpose of bending to form a U-shaped groove, the bending of the cooling plate is limited in direction. Through the setting of the first recessed part, the side of the bent part that is in contact with the battery cell can form a recessed At the same time, the thickness is reduced to facilitate bending to form a U-shaped groove.

In some embodiments, a hollow portion is provided on the bending portion, and the hollow portion is disposed through the thickness direction of the cooling plate to form a rigidity weakening structure.

The setting of the hollow part on the bending part can effectively reduce the rigidity of the bending part to facilitate bending on the one hand, and on the other hand can reduce the weight of the cooling plate to improve the weight reduction of the entire battery product.

In some embodiments, the U-shaped groove includes three surfaces connected in sequence, and the three surfaces are used for bonding with the battery cells; the cooling channel is extended and arranged inside the cooling plate along the direction passing through the three surfaces in sequence, and the cooling channel avoids Open the hollow part.

The cooling passage arranged in this way can pass through all surfaces of the U-shaped groove, and does not affect each other with the hollow part.

In some embodiments, the number of the hollow part is one, and the hollow part is arranged in the middle of the bending part.

By adopting the above technical solution, the strength at the middle position of the bending part is effectively reduced to facilitate bending.

In some embodiments, there are multiple hollow parts, and the multiple hollow parts are evenly distributed on the bending part.

By adopting the above-mentioned technical solution, the strength of all places on the entire bending portion can be balanced.

In some embodiments, the cooling channels extend from one end of the cooling plate to the other.

By adopting the above technical solution, the heat generated during the heating process of the battery cells can be taken away by the cooling medium along the flow direction, thereby effectively solving the problem of excessive temperature rise during battery operation.

In some embodiments, there are multiple U-shaped grooves, and the opening directions of two adjacent U-shaped grooves are opposite.

Through the above arrangement, the cooling plate with the same size can be bent as much as possible to form more U-shaped grooves to accommodate more battery cells, thereby improving the utilization rate of the cooling plate.

In some embodiments, the battery cell includes a first output pole and a second output pole, and the first output pole and the second output pole are arranged at both ends of the battery cell along the extending direction of the bending portion; wherein, the first output pole At least part of the pole and at least part of the second output pole protrude from the U-shaped groove along the extending direction of the bent part.

By arranging that the first output pole and the second output pole are at least partially exposed from the U-shaped groove, interference between the electrical connector and the U-shaped groove is avoided when the electrical connector is used to connect the output poles of the battery cells.

In some embodiments, an adhesive is provided between the battery cell and the U-shaped groove to fix the battery cell.

Compared with the method of fixing with connectors, the battery cell is fixed in the U-shaped groove by bonding, which not only effectively improves the space utilization rate, but also facilitates the increase of the connection area between the battery cell and the U-shaped groove, thereby Improve the overall strength of battery products; at the same time, it can also reduce the number of parts and reduce production complexity.

In some embodiments, the battery further includes an upper case and a lower case, and the upper case and the lower case are enclosed to form an accommodating cavity, and the cooling plate and the battery cells are accommodated in the accommodating cavity; the upper case is provided with The second recessed portion is recessed toward the direction of the accommodating cavity, and the second recessed portion at least partially coincides with the projection of the U-shaped groove on the upper case.

Since the concave direction of the second concave part is towards the accommodating cavity, and the projection of the second concave part and the U-shaped groove on the upper case at least partially coincides, it can be connected with at least part of the battery cell and/or at least part of the cooling plate. Contact, thereby increasing the heat dissipation area and improving the heat exchange between the internal and external air; at the same time, the second concave part can also increase the rigidity of the upper box to prevent the upper box from beating the battery cell or generating abnormal noise.

In some embodiments, the lower case is provided with a second recessed portion.

By adopting the above technical solution, since the recessed direction of the second recessed part faces the accommodating cavity, and the projection of the second recessed part and the U-shaped groove on the upper case at least partially coincides, it can be compatible with at least part of the battery cell and/or Or at least part of the cooling plate is in contact, thereby increasing the heat dissipation area and improving the heat exchange between the internal and external air; at the same time, the second recess can also improve the rigidity of the lower box to prevent the lower box from beating the battery cell or generating abnormal noise.

In some embodiments, the bending angle of the bending portion is 90°.

By adopting the above technical solution, the three sides of the battery cell can be effectively cooled.

In a second aspect, the present application provides an electrical device, including the battery in the above embodiment, and the battery is used to provide electrical energy.

The electric device provided by the embodiment of the present application uses the battery in the above embodiment, which effectively improves the heat dissipation performance of the electric device, improves the overall structural strength of the electric device, and reduces the difficulty of the production process, which is conducive to improving production efficiency.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following descriptions are only for this application. For some embodiments, those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application;

Fig. 2 is a perspective view of a battery provided by some embodiments of the present application;

Fig. 3 is the enlarged schematic diagram of place A in Fig. 2;

Fig. 4 is the tiling diagram of the cooling plate in some embodiments of the present application;

Fig. 5 is the enlarged schematic diagram of place B in Fig. 4;

Figure 6 is a perspective view of a cooling plate in some embodiments of the present application;

FIG. 7 is an enlarged schematic diagram of place C in FIG. 6;

Figure 8 is a front view of a cooling plate in some embodiments of the present application;

Fig. 9 is an enlarged schematic diagram of place D in Fig. 8;

Fig. 10 is an exploded perspective view of a battery (including an upper case and a lower case) provided by some embodiments of the present application.

The reference numerals in the specific embodiment are as follows:

1000, vehicle;

1100, battery; 1200, controller; 1300, motor;

100, a battery cell; 110, the first output pole;

200, cooling plate; 210, cooling channel; 220, bending part; 221, first recessed part; 222, hollow part; 230, U-shaped groove; 231, opening of U-shaped groove; 232, first surface; 233, The second side; 234, the third side;

300, the upper box; 310, the second depression;

400, the lower box body.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be noted that when a component is referred to as being “fixed on” or “disposed on” another component, it may be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are for convenience of description only, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations. The terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features. "Plurality" means two or more, unless otherwise clearly and specifically defined.

As we all know, the two key problems of electric vehicles are safety and battery life, and these two problems are highlighted in the power battery. In order to improve the battery life, the battery tends to be designed with a higher energy density; and the battery energy density increases, and the required charging time will increase accordingly. In order to shorten the battery charging time, fast charging (hereinafter referred to as fast charging) came into being. However, although fast charging solves the problem of long battery charging time, the heat generated by the tabs of the battery cell during fast charging is several times or dozens of times that of the tabs of the battery cell in the ordinary charging method. Even more, based on the location of the battery in the electric vehicle, this further aggravates the heating problem of the battery.

At present, most electric vehicles use air cooling to dissipate heat from the battery, but the cooling efficiency of air cooling is low, the heat dissipation is uneven, and it is difficult to prevent dust and water, especially in hot weather. Therefore, more and more electric vehicles have begun to use water cooling to dissipate heat from the battery.

The applicant noticed that the battery water-cooling scheme in the prior art requires the cooling plate to contact as many surfaces of the battery cells as possible to improve the uniformity of heat dissipation, resulting in a corresponding increase in the complexity of the cooling plate structure, which in turn makes the production Crafting difficulty increased. Specifically, in the prior art, the serpentine flat tube is used as the cooling channel, and a plurality of serpentine flat tubes are arranged side by side to form a water cooling system. As a water cooling scheme, this involves separate Processing and post-assembly work, the water cooling system under this scheme has a complex structure and poor integrity, and has many production processes and low production efficiency. In order to improve the integrity of the water-cooling system, the cooling plate in the form of a whole plate can be directly bent to form a U-shaped groove. It is more difficult to process the cooling plate.

In order to alleviate the problem that the cooling plate is not easy to bend, the applicant has found that a rigidity weakening structure can be provided at the bending part of the cooling plate, so that the stiffness of the bending part is smaller than the stiffness of the positions other than the bending part on the cooling plate , so that the bending part is easy to bend to form a U-shaped groove, and finally achieves the goal of reducing the difficulty of the battery product production process and improving production efficiency.

The batteries disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts. The battery disclosed in this application can be used to form the power supply system of the electrical device. In this way, the water-cooled plate can be easily bent, thereby reducing the difficulty of the battery product production process and improving the production efficiency.

The embodiment of the present application provides an electric device that uses a battery to provide electric energy. The electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.

In the following embodiments, for the convenience of description, a vehicle 1000 as an electric device according to an embodiment of the present application is taken as an example for description.

Fig. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application; Fig. 2 is a perspective view of a battery 1100 provided by some embodiments of the present application; Fig. 3 is an enlarged schematic diagram of A in Fig. 2; Fig. 4 is a schematic diagram of some embodiments of the present application Figure 5 is an enlarged schematic view of B in Figure 4; Figure 6 is a perspective view of cooling plate 200 in some embodiments of the present application; Figure 7 is an enlarged schematic view of C in Figure 6; The front view of the cooling plate 200 in some embodiments of the application; FIG. 9 is an enlarged schematic diagram of D in FIG. 8; FIG. ).

Referring to FIG. 1 , a vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The interior of the vehicle 1000 is provided with a battery 1100 , and the battery 1100 may be provided at the bottom, head or tail of the vehicle 1000 . The battery 1100 can be used for power supply of the vehicle 1000 , for example, the battery 1100 can be used as an operating power source of the vehicle 1000 . The vehicle 1000 may further include a controller 1200 and a motor 1300 , the controller 1200 is used to control the battery 1100 to supply power to the motor 1300 , for example, for starting, navigating, and working power requirements of the vehicle 1000 during driving.

In some embodiments, the battery 1100 can be used not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .

Continuing to refer to FIG. 1, and referring to FIG. 2 and FIG. 3, according to some embodiments of the present application, the battery 1100 includes: a battery cell 100; The inside of the plate 200 is not easy to show from the outside, so the illustration points to the location of the cooling channel 210), the cooling plate 200 is provided with at least two mutually parallel bending parts 220, and the cooling plate 200 is bent along the bending parts 220 to form At least one U-shaped slot 230 is used for accommodating the battery cell 100 ; wherein, the bent portion 220 is provided with a rigid weakening structure to weaken the rigidity of the cooling plate 200 at the bent portion 220 .

It should be noted that the battery 1100 disclosed in the embodiment of the present application can not only be applied to energy storage power systems such as hydraulic power, thermal power, wind power and solar power stations, but also can be widely used in electric bicycles, electric motorcycles, electric vehicles, etc. Electric vehicles, military equipment, aerospace and many other fields are not specifically limited here.

Among them, the battery cell 100 is the smallest unit that specifically realizes the conversion of electrical energy and chemical energy. The battery cell 100 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 100 may be in the form of a cylinder, a flat body, a cuboid or other shapes.

Specifically, the material of the cooling plate 200 may be aluminum or other materials with good thermal conductivity, and no specific limitation is made here. More specifically, the cooling channel 210 provided inside the cooling plate 200 has the following two implementation modes: In the first embodiment, the cooling channel 210 is arranged between two adjacent bending parts 220, and multiple cooling channels 210 can be arranged to The entire cooling plate 200 is covered, or only one cooling passage 210 may be arranged to cover the entire cooling plate 200 in a serpentine manner. In the second type, the cooling channel 210 passes through each bending part 220 in sequence, and a wider cooling channel 210 can be provided to cover the entire cooling plate 200, that is, the entire cooling plate 200 is a hollow structure, and multiple cooling channels can also be provided. 210 are arranged side by side to cover the entire cooling plate 200 . The cooling channel 210 extends from one end of the cooling plate 200 to the other end, and the heat generated during the heating process of the battery cell 100 can be taken away by the cooling medium along the flow direction, thereby effectively solving the problem of excessive temperature rise of the battery 1100 during operation.

In addition, when only one U-shaped groove 230 is needed, only two mutually parallel bent portions 220 need to be provided on the cooling plate 200; More bending parts 220 are provided on the 200 . It can be seen that the number of bent portions 220 provided on the cooling plate 200 is positively correlated with the number of U-shaped grooves 230 that need to be bent. Furthermore, the number of U-shaped grooves 230 that need to be bent to form is related to the number of battery cells 100 (that is, the energy density of the battery). In order to ensure better heat dissipation uniformity, while the number of battery cells 100 increases, The number of U-shaped grooves 230 will increase accordingly. Wherein, one battery cell 100 can be placed in one U-shaped slot 230 , and multiple battery cells 100 can also be placed.

The battery 1100 of the embodiment of the present application includes a battery cell 100 and a cooling plate 200. A cooling channel 210 is provided inside the cooling plate 200. The cooling channel 210 is used for the passage of the medium, and the battery is realized by cooling or heating the medium in the cooling channel 210. thermal management function. Moreover, at least two mutually parallel bending parts 220 are provided on the cooling plate 200, so that the cooling plate 200 can be bent along the bending parts 220 to form at least one U-shaped groove 230, and the U-shaped groove 230 accommodates the battery on the one hand The cell 100, on the other hand, enables the cooling plate 200 to contact more surfaces of the battery cell 100, and accordingly enables the medium in the cooling channel 210 to pass through more surfaces of the battery cell 100, and finally realizes the improvement of the battery cell 100. The purpose of uniformity of heat dissipation. Wherein, the rigidity weakening structure provided on the bending part 220 reduces the rigidity of the bending part 220 and facilitates bending, so that the cooling plate 200 having the U-shaped groove 230 can be made of a whole plate, compared with the existing In the technology, the cooling plate 200 is produced by splicing, which can reduce the difficulty of the production process and improve production efficiency on the one hand. The torsional rigidity in the horizontal plane and the vertical plane further improves the structural strength of the battery 1100 .

In some embodiments, the thickness of the bent portion 220 is smaller than that of the cooling plate 200, so as to form a rigid weakening structure. Specifically, the thickness of the bent portion 220 can be reduced by thinning the front and back sides in the direction perpendicular to the cooling plate 200, for example, thinning can be performed on any side of the cooling plate 200 described above. , can also be thinned on both sides. By reducing the thickness of the bent portion 220 on the cooling plate 200 , the rigidity of the bent portion 220 is reduced to facilitate bending of the bent portion 220 , thereby reducing the processing difficulty of the bent portion 220 . In addition, the angle at which the cooling plate 200 is bent along the bending portion 220 can be adjusted. In order to realize water cooling on three sides of the battery 1100 , the bending angle can be 90°.

It can be understood that forming the U-shaped groove 230 restricts the bending direction of the cooling plate 200 . Based on the above considerations, in some embodiments, referring to FIG. 4 and FIG. 5 , the side of the bent portion 220 close to the battery cell 100 is provided with a first concave portion 221 that is recessed away from the battery cell 100 to reduce bending. The thickness of the folded portion 220. Through the arrangement of the first recessed portion 221 , the side of the bent portion 220 that is in contact with the battery cell 100 can be recessed while reducing the thickness, so as to facilitate bending to form the U-shaped groove 230 . Wherein, the first concave portion 221 may be in a circular arc shape, a semicircle shape, or even a triangle shape, and there is no special limitation here.

In some embodiments, referring to FIG. 6 and FIG. 7 , a hollow portion 222 is disposed on the bending portion 220 , and the hollow portion 222 is disposed through the thickness direction of the cooling plate 200 to form a rigidity weakening structure.

The number of hollow parts 222 provided on the bent part 220 is not limited, and one or more hollow parts 222 may be provided on one bent part 220 . When only one hollow portion 222 is provided on the bending portion 220 , the hollow portion 222 can be disposed at a middle position of the bending portion 220 to reduce the strength of the middle position of the bending portion 220 and facilitate bending. One hollow part 222 can also be arbitrarily arranged at any position on the bending part 220; and when the bending part 220 is provided with a plurality of hollow parts 222, the plurality of hollow parts 222 can be evenly distributed on the bending part 220 (that is, the distance between two adjacent hollowed out parts 222 is fixed), so as to balance the strength of the entire bent part 220 everywhere. Of course, a plurality of hollow parts 222 can also be randomly distributed on the bending part 220 (that is, the distance between two adjacent hollow parts 222 is not fixed), and the distribution method of the hollow parts 222 is not specifically limited here. Wherein, the shape of the hollow portion 222 includes but is not limited to square, rectangle, rhombus, circle, ellipse and so on. The plurality of hollow parts 222 may have the same shape or different shapes.

The setting of the hollow part 222 on the bending part 220 can effectively reduce the rigidity of the bending part 220 to facilitate bending, and on the other hand, can also reduce the weight of the cooling plate 200 to improve the weight reduction of the entire battery 1100 .

In some embodiments, as shown in FIG. 8 and FIG. 9, the U-shaped groove 230 includes three faces (the first face 232, the second face 233 and the third face 234) connected in sequence, and the three faces are used for connecting with the battery. The cells 100 are bonded together, and when the cooling medium enters the cooling plate 200 , it takes away the internal heat of the battery cells 100 after passing through the cooling channels 210 . Moreover, the cooling channel 210 is extended and disposed inside the cooling plate 200 in a direction passing through three surfaces in sequence, and the cooling channel 210 avoids the hollow portion 222 .

When the number of battery cells 100 is large, multiple battery cells 100 can be packaged in the form of a battery module to improve the integrity of the battery 1100 . Each battery module includes a plurality of battery cells 100 , and the plurality of battery cells 100 can be connected in series, in parallel, or in combination. The combination means that the plurality of battery cells 100 are connected in series and in parallel. There can be multiple battery modules, and multiple battery modules can be connected in series or in parallel or in combination. The combination means that multiple battery modules are connected in series and in parallel. The cooling plate 200 can be bent to form one or more U-shaped grooves 230 according to the design of the number of battery modules, so that the cooling channel 210 can pass through all the surfaces of the U-shaped grooves 230 without interfering with the hollow part 222, so as to Three-side water cooling of the battery 1100 is realized.

It should be noted that each U-shaped groove 230 is in the extending direction of the bent portion 220 (ie, the length direction of the U-shaped groove 230 ) and the direction passing through each U-shaped groove 230 (ie, the width direction of the U-shaped groove 230 ). A plurality of battery cells 100 can each be provided. However, in order to ensure a better heat dissipation effect, in some embodiments, 1 to 3 battery cells 100 are placed in the width direction of each U-shaped groove 230, specifically 1 to 3 battery cells 100 are referred to as battery cells 100 The large surfaces are arranged in the U-shaped groove 230 in a manner of sticking to each other. In this embodiment, the illustration shows that two battery cells 100 are placed. In this way, the three sides of the U-shaped groove 230 are in contact with the three sides of the two battery cells 100, so that the three sides of the battery 1100 are cooled by water, and the temperature of the conventional battery 1100 is solved. raised too high problem.

Continuing to refer to FIG. 8 , when multiple U-shaped slots 230 are required, in some embodiments, multiple U-shaped slots 230 can be bent and formed on the cooling plate 200 in a staggered manner, that is, two adjacent U-shaped slots The opening 231 of 230 is in the opposite direction. Through the above arrangement, the cooling plate 200 with the same size can be bent to form more U-shaped slots 230 to accommodate more battery cells 100 , thereby improving the utilization rate of the cooling plate 200 . In other embodiments, multiple U-shaped grooves 230 can also be bent and formed on the cooling plate 200 in a sequential arrangement, that is, the openings 231 of the multiple U-shaped grooves 230 have the same direction, and two adjacent U-shaped grooves Between 230 is a transition area, and the transition area is not used for setting the battery cells 100 .

In some embodiments, referring to FIG. 2 , the battery cell 100 includes a first output pole 110 and a second output pole (not shown in the figure due to viewing angle), and the first output pole 110 and the second output pole are arranged on the battery Both ends of the cell 100 along the extending direction of the bending portion 220; wherein, at least part of the first output pole 110 and at least part of the second output pole protrude from the U-shaped groove 230 along the extending direction of the bending portion 220 out.

By setting at least part of the first output pole 110 and the second output pole protruding from the U-shaped groove 230, when using an electrical connector (not shown in the figure) to connect the output poles of each battery cell 100 to avoid The electrical connector interferes with the U-shaped slot 230 . Moreover, after the cooling plate 200 realizes water cooling on three sides of the battery cell 100, it passes through more sides of the battery cell 100, and the cooling medium passes through the cooling channel 210, which can quickly take away the heat of the battery cell 100, so that the battery cell The temperature of 100 will not be too high, so that the temperature of the electrical connectors connected to the battery cells 100 will not be too high. Wherein, the electrical connector is used to realize the electrical connection between multiple battery modules, even multiple battery cells 100 in a battery module. Specifically, the electrical connector may be a bus component.

There are many ways to fix the battery cell 100 in the U-shaped groove 230 , such as bonding, riveting, welding and fixing by connectors. In some embodiments, the battery cell 100 can be fixed in the U-shaped groove 230 of the cooling plate 200 by coating the adhesive on the contact surface of the battery cell 100 and the U-shaped groove 230 .

Optionally, the adhesive may be structural glue, thermally conductive glue, etc., wherein the structural glue has high strength, and the thermally conductive glue facilitates heat exchange. Compared with the way of fixing with connectors, the battery cell 100 is fixed in the U-shaped groove 230 by bonding, which not only effectively improves the space utilization rate, but also facilitates increasing the distance between the battery cell 100 and the U-shaped groove 230. The connection area is increased, thereby improving the overall strength of the battery 1100; at the same time, the number of parts can be reduced to reduce the complexity of production.

In some embodiments, the battery 1100 further includes a battery box, which is used to provide accommodation space for the battery cells 100 and the cooling plate 200 , and the battery box may adopt various structures. Referring to FIG. 10 , the battery box specifically includes an upper box body 300 and a lower box body 400 . The upper box body 300 and the lower box body 400 enclose a housing cavity, and the cooling plate 200 and the battery cells 100 are accommodated in the housing cavity. Wherein, the upper box body 300 is provided with a second recessed portion 310 , the second recessed portion 310 is recessed toward the receiving cavity, and the projection of the second recessed portion 310 and the U-shaped groove 230 on the upper box body 300 at least partially overlaps.

In other embodiments, the battery box includes an upper box 300 and a lower box 400. In one embodiment, the upper box 300 and the lower box 400 cover each other, and the upper box 300 and the lower box 400 jointly define out of storage space. In another embodiment, the lower box body 400 can be a hollow structure with one end open, the upper box body 300 can be a plate-shaped structure, and the upper box body 300 is covered on the opening side of the lower box body 400, so that the upper box body 300 and the lower case 400 jointly define an accommodation space. In yet another embodiment, the upper box body 300 and the lower box body 400 can also be hollow structures with one side opening, and the opening side of the upper box body 300 is covered with the opening side of the lower box body 400 . In addition, it should be noted that the second recessed part 310 can be provided on any one of the upper box body 300 or the lower box body 400 according to actual needs, and can also be provided on both the upper box body 300 and the lower box body 400 The second recessed part 310 . Of course, the battery box formed by the upper box 300 and the lower box 400 can be in various shapes, such as a cylinder, a cuboid, and the like.

Since the concave direction of the second concave portion 310 faces the accommodating cavity, and the projection of the second concave portion 310 and the U-shaped groove 230 on the upper case 300 at least partially coincides, it can be at least partly connected to the battery cell 100 and/or At least part of the cooling plate 200 is in contact, thereby increasing the heat dissipation area and improving the heat exchange between the internal and external air; at the same time, the second recessed part 310 can also improve the rigidity of the upper box 300, preventing the upper box 300 from beating the battery cells or causing Abnormal noise. In other embodiments, the projection of the second recessed portion 310 and the U-shaped groove 230 on the upper case 300 can also be set to completely overlap, so as to further improve the heat dissipation effect. In addition, the lower box 400 bears the weight of the entire battery 1100 and can be manufactured by bending and welding sheet metal parts, stamping and welding sheet metal parts, or aluminum alloy casting, or aluminum alloy die casting.

The embodiment of the present application also provides an electric device, including the battery 1100 in the above embodiment, and the battery 1100 is used to provide electric energy.

It can be understood that the electrical device may be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.

The electric device provided by the embodiment of the present application uses the battery 1100 in the above embodiment, which effectively improves the heat dissipation performance of the electric device, improves the overall structural strength of the electric device, and reduces the difficulty of the production process, which is conducive to improving production efficiency.

The above are only optional embodiments of the application, and are not intended to limit the application. For those skilled in the art, various modifications and changes may occur in this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

A battery, comprising:

battery cell;

A cooling plate, a cooling channel is provided inside the cooling plate, at least two mutually parallel bending parts are provided on the cooling plate, and at least one U-shaped groove is formed by bending the cooling plate along the bending parts, so The U-shaped groove is used to accommodate the battery cell;

Wherein, the bending portion is provided with a rigidity weakening structure to weaken the rigidity of the cooling plate at the bending portion.
The battery according to claim 1, wherein a thickness of the bent portion is smaller than a thickness of the cooling plate to form the rigidity weakening structure.
The battery according to claim 2, wherein the side of the bent portion close to the battery cell is provided with a first concave portion that is recessed away from the battery cell, so as to reduce the size of the bent portion. thickness of.
The battery according to claim 1, wherein a hollow part is provided on the bending part, and the hollow part is provided through a thickness direction of the cooling plate to form the rigidity weakening structure.
The battery according to claim 4, wherein the U-shaped groove includes three surfaces connected in sequence, and the three surfaces are used to attach to the battery cell;

The cooling channel extends along the direction passing through the three surfaces in sequence and is arranged inside the cooling plate, and the cooling channel avoids the hollow part.
The battery according to claim 4, wherein the number of the hollow part is one, and the hollow part is arranged at a middle position of the bending part.
The battery according to claim 4, wherein the number of the hollowed out parts is multiple, and the multiple hollowed out parts are evenly distributed on the bent part.
The battery according to any one of claims 1-7, wherein the cooling channel extends from one end of the cooling plate to the other end.
The battery according to any one of claims 1-7, wherein there are multiple U-shaped grooves, and the opening directions of two adjacent U-shaped grooves are opposite.
The battery according to any one of claims 1-7, wherein the battery cell includes a first output pole and a second output pole, and the first output pole and the second output pole are arranged on the Two ends of the monomer along the extending direction of the bending portion;

Wherein, at least part of the first output pole and at least part of the second output pole protrude from the U-shaped groove along the extending direction.
The battery according to any one of claims 1-7, wherein an adhesive is provided between the battery cell and the U-shaped groove to fix the battery cell.
The battery according to any one of claims 1-7, wherein the battery further comprises an upper case and a lower case, and an accommodating chamber is enclosed between the upper case and the lower case, and the the cooling plate and the battery cells are accommodated in the accommodation cavity;

The upper box is provided with a second concave portion, the second concave portion is concave toward the direction of the accommodating cavity, and the projection of the second concave portion and the U-shaped groove on the upper box is at least partly coincide.
The battery according to claim 12, wherein the second recess is provided on the lower case.
The battery according to any one of claims 1-7, wherein the bending angle of the bending portion is 90°.
An electrical device, comprising the battery according to any one of claims 1 to 14, the battery is used to provide electrical energy.