CN216251000U

CN216251000U - Lower box, battery and power consumption device

Info

Publication number: CN216251000U
Application number: CN202220291914.8U
Authority: CN
Inventors: 余效银; 黄智杰; 苗慧敏
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-04-08
Anticipated expiration: 2032-02-14

Abstract

The application provides a lower box, battery and electric installation relates to battery technical field. The lower box body comprises a lower box body. The lower box body comprises a peripheral wall and a fixing piece. The peripheral wall encloses and blocks to form an accommodating cavity for accommodating the battery monomer. The fixing pieces are arranged in the accommodating cavity at intervals and are connected with the peripheral wall. The fixing piece is provided with a clamping portion and a heat exchange portion, the clamping portion is used for clamping the single battery, and the heat exchange portion is used for containing cold air flow to enable the cold air flow to exchange heat with the single battery. In the lower box body, the fixing piece is arranged in the accommodating cavity formed by the surrounding wall in a surrounding manner, and the clamping part and the heat exchanging part are arranged on the fixing piece, so that the clamping part can clamp and fix the single batteries between the fixing pieces; the heat exchanging part can accommodate cold air flow when the temperature of the single battery is higher, so that the cold air flow is in contact with the single battery, the single battery is cooled, and the safety performance of the single battery in use is improved.

Description

Lower box, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a lower box body, a battery and an electric device.

Background

Electric vehicles are an important component of sustainable development of the automotive industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor in its development.

In addition to improving the performance of batteries, safety issues are also a considerable problem in the development of battery technology. If the safety problem of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem to be solved urgently in the battery technology.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a lower case, a battery, and an electric device, so as to improve the safety performance of the battery.

According to a first aspect of embodiments of the present application, a lower case is provided. The lower box body comprises a lower box body. The lower box body comprises a peripheral wall and a fixing piece. The peripheral wall encloses and blocks to form an accommodating cavity for accommodating the battery monomer. The fixing pieces are arranged in the accommodating cavity at intervals and are connected with the peripheral wall. The fixing piece is provided with a clamping portion and a heat exchange portion, the clamping portion is used for clamping the single battery, and the heat exchange portion is used for accommodating cold air flow so that the cold air flow and the single battery exchange heat.

This application embodiment sets up the mounting through enclosing the holding intracavity that keeps off the formation at the perisporium to set up clamping part and heat transfer portion on the mounting, make clamping part can carry out centre gripping, fixed to the battery monomer that sets up between the mounting, heat transfer portion can hold the cold air current when the free temperature of battery is higher, and the in-process of cold air current and battery monomer contact is cooled down for battery monomer, improves the security performance when battery monomer uses.

In some embodiments, the fixing member is configured as a plate-like structure, the heat exchanging part is configured as a groove of a surface of the plate-like structure, and the clamping part is configured as a protrusion of the surface of the plate-like structure.

The clamping part is arranged to be a bulge, so that the bulge can be abutted against the single battery, and the single battery is clamped and fixed; in addition, through setting up heat transfer portion into the recess for the recess can hold the cold air current, so that the cold air current contacts with battery monomer, gives battery monomer cooling.

In some embodiments, the clamping portion and the heat exchanging portion are provided in plurality, the plurality of heat exchanging portions are arranged at intervals, and the clamping portion is formed between adjacent heat exchanging portions.

The plurality of heat exchange parts are arranged at intervals, so that cold air flow can be accommodated in the plurality of heat exchange parts arranged at intervals, different parts of the single battery are cooled, and the cooling rate of the cold air flow to the single battery is improved; simultaneously, form clamping part between adjacent heat transfer portion for a plurality of clamping parts can be at a plurality of positions butt battery monomer, increase clamping part to the free centre gripping dynamics of battery, reduce the free possibility that takes place vibrations of battery.

In some embodiments, the lower box further comprises a baffle coupled to the lower box body. The flow guide piece is provided with a flow guide cavity communicated with the heat exchange part, and the flow guide cavity is used for introducing cold air flow and conveying the cold air flow to the heat exchange part.

Through above-mentioned scheme, the water conservancy diversion piece can introduce the cold air current when battery monomer's temperature is higher to carry the cold air current to heat transfer portion, guarantee that heat transfer portion holds the cold air current, be convenient for cold air current and battery monomer heat transfer.

In some embodiments, the flow guide cavity has a tapered structure for increasing the flow velocity of the cold airflow into the flow guide cavity.

Under the condition that the flow of the cold air flow is constant, the flow velocity of the cold air flow entering the flow guide cavity is gradually increased along with the reduction of the section area of the tapered structure. When the flow velocity of the cold airflow is increased, the rate of the cold airflow entering the heat exchanging part along the diversion cavity is increased, and the heat exchanging efficiency of the cold airflow and the single battery is improved.

In some embodiments, the lower box body further has a bearing member on a side thereof facing the deflector. The carrier is connected to the peripheral wall. The bearing part is used for bearing the battery monomer.

Through above-mentioned scheme for it can play the bearing effect to battery monomer to hold carrier, reduces battery monomer and takes place the possibility of vibrations towards water conservancy diversion spare.

In some embodiments, the carrier is configured as a sheet structure having a plurality of airflow channels arranged at intervals, the number of the airflow channels is equal to or greater than the number of the heat exchanging portions, and each of the heat exchanging portions is communicated with at least a part of one of the airflow channels.

Through above-mentioned scheme, can increase the area of intercommunication of water conservancy diversion chamber and heat transfer portion, and then increase the flow area when the cold air current enters the heat transfer portion along the water conservancy diversion chamber to and the free heat transfer area of cold air current and battery. In addition, each heat exchange part is at least communicated with one part of the air flow channel, so that each heat exchange part can contain cold air flow, and the heat exchange area between the cold air flow and the battery monomer is favorably ensured.

In some embodiments, a support member is disposed in the diversion cavity, and the support members are arranged at intervals. The arrangement direction of the supporting pieces is perpendicular to the air inlet direction of the flow guide cavity, and the supporting pieces are used for supporting the bearing pieces and the single batteries.

Through above-mentioned scheme, support piece can support bearing spare and battery monomer, reduces the possibility that bears the weight of and drops to and battery monomer takes place the possibility of vibrations towards the water conservancy diversion spare.

In some embodiments, the supporting member includes a main supporting portion and a sub supporting portion connected to each other, and the main supporting portion is arranged in a direction perpendicular to the arrangement direction of the fixing members.

Through setting up support piece for including main supporting part and branch supporting part, can increase support piece and to bearing the free supporting area of thing and battery, improve support piece and to bearing the free supporting force degree of thing and battery. In addition, the arrangement direction of the main supporting part and the arrangement direction of the fixing part are set to be vertical, so that each supporting part can support each single battery, the possibility that the bearing part falls off can be reduced, and the possibility that the single battery vibrates towards the flow guide part can be reduced.

In some embodiments, the baffle further has a first securing structure, the lower housing body further has a second securing structure, and the lower housing further includes a fastener connecting the first securing structure and the second securing structure to secure the lower housing body and the baffle.

Through the scheme, the lower box body and the flow guide piece can be connected by the first fixing structure and the second fixing structure, the fastener can reinforce the connection between the first fixing structure and the second fixing structure, and the lower box body and the flow guide piece are not easy to separate.

In some embodiments, the first fixation structure comprises a leaf spring having a first slot, two leaf springs being stacked to form a gap; the second fixing structure is a connecting sheet matched with the gap, and the connecting sheet is provided with a second slotted hole opposite to the first slotted hole; the fastener includes the bolt, and the bolt passes first slotted hole and second slotted hole to fixed lower box body and water conservancy diversion spare.

The first fixing structure is provided with two laminated reeds with gaps, and the second fixing structure is provided with a connecting piece, so that the connecting piece can extend into the gap between the two reeds to connect the lower box body with the flow guide piece; in addition, the fastening piece is arranged to be a bolt, so that the bolt can penetrate through the first slotted hole in the reed and the second slotted hole in the connecting sheet, the first fixing structure and the second fixing structure are fastened, and the connection firmness of the lower box body and the flow guide piece is enhanced.

According to a second aspect of embodiments herein, there is provided a battery. The battery includes at least one battery cell and the lower case of the first aspect. The lower box body is used for accommodating the battery monomer.

According to a third aspect of embodiments of the present application, there is provided an electric device. The power consuming device includes the battery of the second aspect. The battery is used for providing electric energy.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application.

Fig. 2 is an exploded view of a battery in some embodiments of the present application.

Fig. 3 is an exploded view of the lower housing in some embodiments of the present application.

Fig. 4 is an exploded view of the lower housing body in some embodiments of the present application.

Figure 5 is a first illustration of a fastener according to some embodiments of the present application.

Figure 6 is a second schematic view of a fastener according to some embodiments of the present application.

Fig. 7 is an exploded view of a baffle location according to some embodiments of the present application.

A vehicle 1;

battery 10, controller 20, motor 30;

an upper case 100, a lower case 200, a battery cell 300;

the lower box body 210, the peripheral wall 211, the fixing member 212, the clamping portion 212a, the heat exchanging portion 212b, the bearing member 213, the airflow channel 213a, and the second fixing structure 214; a flow guide member 220, a flow guide cavity 220a, a support member 221, a first fixing structure 222; a fastener 230.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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 terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. For example, in the description of the present application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings for the convenience of description and simplicity of description only, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery 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, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and other performance parameters, and also needs to consider the safety of the battery. For batteries, the main safety hazard comes from the charging and discharging process.

The inventor notices that the internal resistance of the battery gradually increases along with the increase of the internal temperature of the battery in the charging or discharging process of the battery, the rate of embedding metal ions into the positive pole piece or the negative pole piece is reduced, the possibility of depositing on the surface of the positive pole piece or the negative pole piece is increased, and the service performance and the safety performance of the battery are reduced.

In order to ensure the normal service temperature of the battery, the inventor researches and discovers that a heat exchange part can be arranged in a lower box body of the battery so as to input cold air flow into the heat exchange part when the temperature of the battery is higher or exceeds the normal service temperature, and the cold air flow exchanges heat with the battery to cool the battery so as to improve the service performance and the safety performance of the battery.

Based on the above consideration, the inventors have conducted extensive studies and have designed a lower case. The lower box body comprises a lower box body. The lower box body comprises a peripheral wall and a fixing piece. The peripheral wall encloses and blocks to form an accommodating cavity for accommodating the battery monomer. The fixing pieces are arranged in the accommodating cavity at intervals and are connected with the peripheral wall. The fixing piece is provided with a clamping portion and a heat exchange portion, the clamping portion is used for clamping the single battery, and the heat exchange portion is used for accommodating cold air flow so that the cold air flow and the single battery exchange heat.

The lower box body can introduce cold air flow into the heat exchange part when the temperature of the single battery is higher, so that the cold air flow exchanges heat with the single battery, the single battery is cooled, and the safety performance of the single battery in use is improved.

The lower box body disclosed by the embodiment of the application can be used for batteries of electric devices such as vehicles, ships or aircrafts, but not limited to. The power supply system can also be used for a battery and the like which form the power supply system of the electric device.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or vibration type electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of description, the following embodiments are described by taking an electric device of some embodiments of the present application as an example of a vehicle.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1 according to some embodiments of the present application. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The interior of the vehicle 1 is provided with a battery 10, and the battery 10 may be provided at the bottom or at the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, and for example, the battery 10 may serve as an operation power source of the vehicle 1. The vehicle 1 may further include a controller 20 and a motor 30, the controller 20 being configured to control the battery 10 to power the motor 30, for example, for start-up, navigation, and operational power requirements while the vehicle 1 is traveling.

In some embodiments of the present application, the battery 10 may be used not only as an operating power source of the vehicle 1, but also as a driving power source of the vehicle 1, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1.

Referring to fig. 2, fig. 2 is an exploded view of a battery 10 according to some embodiments of the present application. The battery 10 includes an upper case 100, a lower case 200, and at least one battery cell 300. The upper case 100 and the lower case 200 are covered with each other. The lower case 200 may have an open structure, the upper case 100 may have a plate-shaped structure, and the upper case 100 covers the open side of the lower case 200 to cover the upper case 100 and the lower case 200. The upper case 100 and the lower case 200 may be both open at one side, and the open side of the upper case 100 may cover the open side of the lower case 200. Of course, the casing 10 formed by the upper casing 100 and the lower casing 200 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

Referring to fig. 3 to 6, fig. 3 is an exploded view of a lower case 200 according to some embodiments of the present application, fig. 4 is an exploded view of a lower case body 210 according to some embodiments of the present application, fig. 5 is a first schematic view of a fixing member 212 according to some embodiments of the present application, and fig. 6 is a second schematic view of the fixing member 212 according to some embodiments of the present application. As shown in fig. 3, the lower case 200 includes a lower case body 210. As shown in fig. 4, the lower case body 210 includes a peripheral wall 211 and a fixing member 212. The peripheral wall 211 encloses a receiving cavity to receive the battery cell 300. The plurality of fixing members 212 are arranged in the accommodating cavity at intervals and connected with the peripheral wall 211. As shown in fig. 5 and 6, the fixing member 212 has a clamping portion 212a and a heat exchanging portion 212b, the clamping portion 212a is used for clamping the battery cell 300, and the heat exchanging portion 212b is used for accommodating a cold air flow so as to exchange heat with the battery cell 300.

The lower case 200 is a part for enclosing the battery cells 300, introducing a cold air flow, and providing a heat exchange space for the cold air flow and the battery cells 300. The lower case 200 may be made of metal, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present invention is not limited thereto.

The lower case body 210 is a member for fixing the battery cell 300 and providing a heat exchange space for the cold air and the battery cell 300.

The peripheral wall 211 is a main component forming the lower case body 210. The receiving cavity formed after the surrounding wall 211 is enclosed may have a predetermined shape, and the predetermined shape may be a cylinder, a flat shape, a rectangular parallelepiped shape, or other shapes. When the accommodating cavity is cylindrical, the accommodating cavity accommodates the cylindrical battery cell 300. When the accommodating cavity is rectangular, the accommodating cavity accommodates the rectangular battery cells 300. The shape of the accommodating cavity is not specially limited in the embodiment of the application.

The fixing member 212 is a member for partitioning the receiving cavities, fixing the battery cells 300, and receiving a cold air flow. The plurality of fixing members 212 may be fixedly connected to the peripheral wall 211 or detachably connected thereto. When the plurality of fixing members 212 are detachably connected to the peripheral wall 211, a plurality of insertion grooves may be formed in an inner wall of the peripheral wall 211, and an insertion piece fitted into the insertion groove may be formed at an end of each fixing member 212, so that the plurality of fixing members 212 are connected to the plurality of peripheral walls 211 by inserting the plurality of insertion pieces into the plurality of insertion grooves, respectively. Further, when the plurality of fixing members 212 are detachably connected to the peripheral wall 211, the number of the fixing members 212 in the accommodating chamber can be increased or decreased to form accommodating units of different specifications in the accommodating chamber, so as to accommodate the battery cells 300 of different specifications.

It should be noted that, for example, in the position state of fig. 3 to 4, the size of the fixing member 212 in the height direction may be larger than that of the battery cell 300 in the height direction, so that the cold airflow received by the heat exchanging portion 212b may reach the top surface of the battery cell 300 to exchange heat with the top surface. In addition, when the size of the fixing member 212 in the height direction is larger than the size of the battery cell 300 in the height direction, the fixing member 212 can protect the battery cell 300, and damage of other components to the battery cell 300 is reduced.

The clamping portion 212a is a member for clamping the battery cell 300. After the clamping part 212a clamps the single battery 300, the single battery 300 can be limited, so that the vibration of the single battery 300 in the using process is reduced.

The heat exchanging part 212b is a part for receiving a cold airflow, and the cold airflow of the heat exchanging part 212b may contact the battery cell 300 to obtain heat energy generated by the battery cell 300.

In the technical scheme of this application embodiment, set up mounting 212 through enclosing the holding intracavity that the fender formed at perisporium 211, and set up clamping part 212a and heat transfer portion 212b on mounting 212, make clamping part 212a can carry out the centre gripping, fixed to the battery cell 300 that sets up between mounting 212, heat transfer portion 212b can hold the cold air current when the temperature of battery cell 300 is higher, the in-process that the cold air current contacted with battery cell 300, cool down for battery cell 300, the security performance when improving battery cell 300 and using.

In other embodiments according to the present application, please continue to refer to fig. 5. The fixing member 212 is configured as a plate-shaped structure, the heat exchanging portion 212b is configured as a groove of a surface of the plate-shaped structure, and the clamping portion 212a is configured as a protrusion of the surface of the plate-shaped structure.

The plate-shaped structure has the advantages of simple structure, small volume and light weight. When the fixing member 212 is provided in a plate-shaped structure, the fixing member 212 is more easily coupled to the peripheral wall 211 in the manufacturing process of the lower case body 210; when the fixing element 212 is disposed in the accommodating cavity, the accommodating cavity occupied by the fixing element 212 has a smaller volume; after the lower case body 210 is molded, the lower case body 210 is lighter in weight.

When the clamping portion 212a is configured as a protrusion of the surface of the plate-shaped structure, the protrusion is formed to extend toward the battery cell 300 along the surface of the plate-shaped structure. The shape of the protrusion may be various, for example, a cylindrical shape, a rectangular parallelepiped shape, a circular truncated cone shape, a truncated pyramid shape, or the like.

When the heat exchanging portion 212b is configured as a groove of the surface of the plate-shaped structure, the groove is concavely formed along the surface of the plate-shaped structure in a direction away from the battery cell 300. The shape of the groove can be rectangular parallelepiped, semi-cylindrical, prismatic, etc. When the shape of the groove is a cuboid, the amount of the cold airflow that can be accommodated by the groove is the largest, and the rate of heat exchange between the cold airflow and the battery cell 300 is faster.

In the technical scheme of the embodiment of the application, the clamping part 212a is arranged to be convex, so that the convex can be abutted against the single battery 300, and clamping and fixing of the single battery 300 are realized; in addition, the heat exchanging part 212b is provided as a groove, so that the groove can accommodate cold airflow, so that the cold airflow directly exchanges heat with the battery cell 300, and the battery cell 300 is cooled.

In other embodiments, with continued reference to fig. 6, the fixing member 212 may also be configured as a ring-shaped structure, and the ring-shaped structure may be connected to the peripheral wall 211. The ring structure may fix the cylindrical battery cell 300. The clamping portion 212a may be provided as a protrusion of an inner wall of a ring structure to clamp the cylindrical battery cell 300. The heat exchanging part 212b may be provided as a groove of an inner wall of the ring structure to accommodate the cold airflow.

According to other embodiments of the present application, please refer to fig. 5 and 6, a plurality of clamping portions 212a and heat exchanging portions 212b are provided, the plurality of heat exchanging portions 212b are arranged at intervals, and the clamping portions 212a are formed between adjacent heat exchanging portions 212 b.

The plurality of heat exchanging portions 212b are arranged at intervals, which means that the plurality of heat exchanging portions 212b are arranged at intervals on the surface of the fixing member 212 in the extending direction of the fixing member 212.

If the heat exchanging portions 212b are connected, the clamping portion 212a may be disposed at an end of the fixing member 212, and when the clamping portion 212a is disposed at the end of the fixing member 212, a portion of the battery cell 300 clamped by the clamping portion 212a may be depressed due to uneven distribution of force applied to the battery cell 300 by the clamping portion 212a, resulting in structural variation of the battery cell 300. In addition, when the clamping portion 212a is disposed at the end of the fixing member 212, since the middle portion of the battery cell 300 is not supported, the middle portion of the battery cell 300 is easily expanded during use, and when the battery cell 300 is severely expanded, the fixing member 212 is pressed to deform, which affects the shape and volume of the heat exchanging portion 212b, and reduces the receiving amount of the heat exchanging portion 212b to the cold air flow, thereby reducing the heat exchanging efficiency between the cold air flow and the battery cell 300.

In the technical solution of the embodiment of the application, the plurality of heat exchanging portions 212b are arranged at intervals, so that the cold air flow can be accommodated in the plurality of heat exchanging portions 212b arranged at intervals, thereby cooling different parts of the battery cell 300 and increasing the cooling rate of the cold air flow to the battery cell 300; meanwhile, the clamping parts 212a are formed between the adjacent heat exchange parts 212b, so that the clamping parts 212a can be abutted against the single battery 300 at multiple positions, the clamping force of the clamping parts 212a on the single battery 300 is increased, and the possibility of vibration of the single battery 300 is reduced.

Referring to fig. 7, according to other embodiments of the present application, fig. 7 is an exploded view of a portion of the baffle 220 according to some embodiments of the present application. The lower case 200 further includes a guide 220 connected to the lower case body 210. As shown in fig. 7, the flow guide member 220 has a flow guide cavity 220a communicating with the heat exchange portion 212b, and the flow guide cavity 220a is used for introducing the cold air flow and delivering the cold air flow to the heat exchange portion 212 b.

The air guide 220 is a member that introduces a cold air flow and shields the bottom surface of the battery cell 300. The flow guide 220 may be provided in a cylindrical shape, a rectangular parallelepiped shape, or the like, based on the outer shape of the lower case body 210.

The guide chamber 220a may be provided as a chamber having two open sides, wherein one open side may be provided toward the lower case body 210 to communicate the guide chamber 220a with the heat exchange part 212b when the guide member 220 is coupled with the lower case body 210; the other side opening may be provided on a side adjacent to one of the side openings to introduce the cold air flow.

In the technical scheme of this application embodiment, the diversion part 220 can introduce the cold air flow when the temperature of the battery cell 300 is high, and convey the cold air flow to the heat exchanging portion 212b, and ensure that the heat exchanging portion 212b contains the cold air flow, so that the cold air flow exchanges heat with the battery cell 300.

According to other embodiments of the present application, please continue to refer to fig. 7, the guiding cavity 220a has a tapered structure for increasing the flow rate of the cold air flow entering the guiding cavity 220 a.

The tapered structure may be disposed at the other side opening of the diversion cavity 220 a. The sectional area of the tapered structure is set to be gradually reduced toward the inside of the baffle chamber 220a along the opening portion.

In the technical scheme of this application embodiment, under the certain condition of cold air current flow, along with the reduction of convergent structure cross sectional area, the velocity of flow of cold air current can increase gradually. When the flow velocity of the cold airflow increases, the rate of the cold airflow entering the heat exchanging portion 212b along the diversion cavity 220a is increased, and the heat exchanging efficiency between the cold airflow and the battery cell 300 is improved.

According to other embodiments of the present application, please refer to fig. 4, the lower box body 210 further has a bearing member 213 on a side facing the flow guiding member 220. The carrier 213 is connected to the peripheral wall 211. The carrier 213 is used for carrying the battery cell 300.

The carrier 213 is a component that carries the battery cell 300. The material of the carrier 213 may be copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The carrier 213 may be connected to the peripheral wall 211, the fixing member 212, or both the peripheral wall 211 and the fixing member 212. When the carrier 213 is connected to both the peripheral wall 211 and the fixing member 212, the carrier 213 is less likely to fall off. The connection of the carrier 213 to the peripheral wall 211 and/or the fixing element 212 may be a fixed connection or a detachable connection. When the bearing member 213 is fixedly connected to the peripheral wall 211 and/or the fixing member 212, welding may be performed, or bonding may be performed by an adhesive. When the bearing 213 is detachably connected to the peripheral wall 211 and/or the fixing member 212, the connection may be by a bolt.

After the fixing members 212 clamp the battery cells 300, the vibration of the battery cells 300 along the arrangement direction of the fixing members 212 can be limited, but the battery cells 300 may still vibrate in a direction approaching the air guide member 220.

In the technical scheme of this application embodiment, set up bearing member 213 in box body 210 one side towards water conservancy diversion piece 220 down for bearing member 213 can play the bearing effect to battery monomer 300, reduces battery monomer 300 towards the possibility that water conservancy diversion piece 220 took place vibrations.

According to other embodiments of the present application, with continued reference to fig. 4, the carrier 213 is configured as a sheet structure, the sheet structure has a plurality of air flow channels 213a arranged at intervals, the number of the air flow channels 213a is greater than or equal to the number of the heat exchanging portions 212b, and each of the heat exchanging portions 212b is at least partially communicated with one of the air flow channels 213 a.

The sheet structure includes a first face and a second face facing away from each other, and the first face or the second face may be disposed toward the plurality of battery cells 300 and contact the bottom surfaces of the plurality of battery cells 300 to support the battery cells 300.

The air flow channel 213a is a channel that communicates the baffle chamber 220a with the heat exchanging part 212 b. The sectional shape of the air flow channel 213a may be provided in a circular shape, a square shape, a polygonal shape, or the like. The airflow passage 213a penetrates the carrier 213. When the airflow channel 213a penetrates the carrier 213, the airflow channel 213a may penetrate the carrier 213 in a direction perpendicular to the first or second surface, such that a path of the cold airflow passing through the airflow channel 213a is shortest and a time required for entering the heat exchanging part 212b is less.

In the technical scheme of this application embodiment, through set up a plurality of air current passageway 213a that the interval was arranged on bearing piece 213, can increase the area of intercommunication of water conservancy diversion chamber 220a and heat transfer portion 212b, and then increase the flow area when the cold air current gets into heat transfer portion 212b along water conservancy diversion chamber 220a to and the heat transfer area of cold air current and battery monomer 300. In addition, each heat exchanging portion 212b communicates with at least a portion of one of the gas flow channels 213a, so that each heat exchanging portion 212b can accommodate a cold gas flow, which is advantageous for ensuring a heat exchange area between the cold gas flow and the battery cell 300.

According to other embodiments of the present application, please continue to refer to fig. 7, a supporting member 221 is disposed in the flow guiding cavity 220a, and the supporting members 221 are spaced apart from each other. The support 221 is arranged perpendicular to the air inlet direction of the diversion cavity 220a, and the support 221 is used for supporting the bearing member 213 and the battery cell 300.

The support 221 supports the carrier 213 and the battery cell 300. The supporting member 221 may be made of copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The supporting member 221 may be connected to an inner wall of the flow guide 220, and the inner wall may be one inner wall or two inner walls. When the supporting member 221 is coupled to both inner walls of the guide member 220, the supporting member 221 is less likely to be separated from the guide member 220. The supporting member 221 may be fixedly connected with the inner wall of the air guide member 220, or may be detachably connected with the inner wall of the air guide member, which is not particularly limited in this application.

If the arrangement direction of the supporting member 221 is parallel to or the same as the air inlet direction of the diversion chamber 220a, the supporting member 221 intercepts the cold airflow, which is not favorable for the cold airflow to enter the heat exchange portion 212b along the diversion chamber 220 a. Therefore, the arrangement direction of the supporting members 221 needs to be set to be perpendicular to the air inlet direction of the diversion cavity 220a to reduce interference of the supporting members 221 with the cold air flow, so that the cold air flow can smoothly enter the heat exchanging portion 212b along the diversion cavity 220 a.

In the technical scheme of this application embodiment, through setting up support piece 221, can support bearing part 213 and battery monomer 300, reduce the possibility that bearing part 213 drops to and battery monomer 300 takes place the possibility of vibrations towards water conservancy diversion piece 220.

According to other embodiments of the present application, with continued reference to fig. 7, the supporting member 221 includes a main supporting portion and a sub supporting portion connected to each other, and the main supporting portion is arranged in a direction perpendicular to the arrangement direction of the fixing member 212.

The main support part is a member that mainly supports the carrier 213 and the battery cell 300. The main supporting part may be provided as a supporting plate.

The sub-support is a member that assists the main support to support the carrier 213 and the battery cell 300. The sub-supporting parts may be provided as a convex structure at both sides of the supporting plate.

The main supporting part and the sub supporting part may be connected to an inner wall of the air guide 220 to increase a connection area between the supporting part 221 and the air guide 220 and to improve a firm connection between the supporting part 221 and the air guide 220.

If the arrangement direction of the main supporting portion is parallel to the arrangement direction of the fixing member 212, each single battery 300 may be supported by only one supporting member 221, or may not be supported by the supporting member 221, which is not favorable for fixing the single battery 300.

In the technical scheme of this application embodiment, through setting up support piece 221 as including main supporting portion and branch supporting portion, can increase support piece 221 to bearing the supporting area of piece 213 and battery cell 300, improve support piece 221 to bearing the supporting dynamics of piece 213 and battery cell 300. In addition, by setting the arrangement direction of the main supporting part and the arrangement direction of the fixing part 212 to be perpendicular, each supporting part 221 can support each battery cell 300, and the possibility that the bearing part 213 falls off and the possibility that the battery cell 300 vibrates toward the flow guide part 220 can be further reduced.

According to other embodiments of the present application, with continued reference to fig. 3, 4 and 7, the air guiding element 220 further has a first fixing structure 222, the lower case body 210 further has a second fixing structure 214, the lower case 200 further includes a fastener 230, and the fastener 230 connects the first fixing structure 222 and the second fixing structure 214 to fix the lower case body 210 and the air guiding element 220.

The first fixing structure 222 is a member that cooperates with the second fixing structure 214 to connect the lower case body 210 with the deflector 220. After the first fixing structure 222 is engaged with the second fixing structure 214, the lower case body 210 and the flow guide 220 are assembled into the lower case 200.

The fastening member 230 is a member for connecting the first fixing structure 222 and the second fixing structure 214 to fix the lower case body 210 and the baffle 220.

The first fixing structure 222 may be a portion of the baffle 220 extending toward the lower case body 210, or may be another mechanism connected to the baffle 220. Similarly, the second fixing structure 214 may be a portion of the lower case body 210 from which the flow guiding element 220 extends, or may be another mechanism connected to the lower case body 210.

In the technical solution of the embodiment of the present application, the first fixing structure 222 and the second fixing structure 214 can connect the lower box body 210 and the air guide 220, and the fastener 230 can reinforce the connection between the first fixing structure 222 and the second fixing structure 214, so that the lower box body 210 and the air guide 220 are less prone to being separated.

According to other embodiments of the present application, with continued reference to FIG. 7, the first fastening structure 222 includes a spring plate having a first slot, two spring plates being stacked to form a gap; with continued reference to fig. 4, the second fixing structure 214 is a connecting plate adapted to the gap, and the connecting plate has a second slot opposite to the first slot; with continued reference to fig. 3, the fastening member 230 includes a bolt passing through the first slot and the second slot to fix the lower box body 210 and the flow guiding element 220.

Both reeds are connected to the flow guide 220. The shape of the two reeds may be adapted to the shape of the flow guide 220. The shape of the connecting piece can be adapted to the shape of the gap between the leaves. Exemplarily, when water conservancy diversion spare 220 sets up to squarely, the shape of two reeds all can be set up to "pi" shape, and when the reed set up to "pi" shape, two reed stacks the back, and the clearance that forms also is "pi" shape, and correspondingly, the shape of connection piece also can be set up to "pi" shape to with the clearance adaptation between the reed.

In the technical solution of the embodiment of the application, the first fixing structure 222 is provided as two stacked reeds with gaps, and the second fixing structure 214 is provided as a connecting piece, so that the connecting piece can extend into the gap between the two reeds to connect the lower box body 210 and the flow guide piece 220; in addition, the fastening member 230 is a bolt, so that the bolt can pass through the first slot on the spring plate and the second slot on the connecting plate to fasten the first fixing structure 222 and the second fixing structure 214, thereby enhancing the connection reliability of the lower box body 210 and the deflector 220.

Furthermore, concave parts far away from the gap can be arranged on the two reeds, and reinforcing blocks with through holes are arranged in the concave parts; the bolt may pass through the first slot of one leaf, the second slot of the connecting piece, the through hole of the reinforcing block, and the first slot of the other leaf in that order. The reinforcing block can make the connecting sheet and the reed jack up tightly, and the firm degree of fixing the lower box body 210 and the flow guide piece 220 is improved.

A battery 10 is also provided according to some embodiments of the present application. The battery 10 includes at least one battery cell 300 and the lower case 200 of the first aspect. The lower case 200 serves to receive the battery cell 300.

According to some embodiments of the present application, there is also provided an electrical device. The electric device includes the battery 10 of the second aspect. The battery 10 is used to supply electric power to the electric device.

The powered device may be any of the aforementioned battery-powered devices or systems.

Referring to fig. 3-7, a lower box 200 is provided according to some embodiments of the present application. The lower case 200 includes a lower case body 210 and a guide member 220 connected by a reed, a connecting piece, and a bolt. Wherein, the reed is arranged on the flow guiding piece 220, and the connecting piece is arranged on the lower box body 210. The lower case body 210 includes a peripheral wall 211, a fixing member 212, and a carrier 213. The peripheral wall 211 encloses and blocks to form an accommodating cavity for accommodating the battery unit 300, and the plurality of fixing pieces 212 are arranged in the accommodating cavity at intervals; the fixing member 212 includes a clamping portion 212a clamping the battery cell 300 and a heat exchanging portion 212b accommodating a cold air flow; the bearing 213 is disposed on a side of the lower case body 210 facing the flow guide 220 and connected to the peripheral wall 211. The guide member 220 has a guide cavity 220a having a tapered structure, and a support member 221 is provided inside the guide cavity 220 a.

In the technical solution of the embodiment of the present application, the peripheral wall 211 can form an accommodating cavity for accommodating the battery cell 300; the fixing member 212 can clamp and fix the battery cell 300 through the clamping portion 212a, the bearing member 213 and the support member 221 can support the battery cell 300, and the vibration of the battery cell 300 can be limited through the cooperation of the fixing member 212, the bearing member 213 and the support member 221; the diversion cavity 220a can introduce cold air flow and convey to the heat exchange portion 212b, and the cold air flow in the heat exchange portion 212b can exchange heat with the battery monomer 300, so as to cool the battery monomer 300, and improve the safety performance of the battery monomer 300 during use.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. The utility model provides a lower box, includes lower box body, its characterized in that, lower box body includes:

the peripheral wall encloses the barrier to form an accommodating cavity so as to accommodate the battery monomer;

the fixing pieces are arranged in the accommodating cavity at intervals and connected with the peripheral wall, each fixing piece is provided with a clamping portion and a heat exchange portion, the clamping portions are used for clamping the battery monomers, and the heat exchange portions are used for accommodating cold air flow so that the cold air flow and the battery monomers exchange heat.

2. The lower case according to claim 1, wherein the fixing member is configured as a plate-like structure, the heat exchanging portion is configured as a groove of a surface of the plate-like structure, and the clamping portion is configured as a protrusion of the surface of the plate-like structure.

3. The lower case according to claim 2, wherein a plurality of the holding portions and a plurality of the heat exchanging portions are provided, the plurality of the heat exchanging portions are arranged at intervals, and the holding portions are formed between the adjacent heat exchanging portions.

4. The lower box body of claim 3, further comprising a flow guide member connected to the lower box body, wherein the flow guide member has a flow guide cavity communicated with the heat exchanging portion, and the flow guide cavity is used for introducing the cold air flow and conveying the cold air flow to the heat exchanging portion.

5. The lower case of claim 4, wherein the baffle chamber has a tapered structure for increasing a flow rate of the cold airflow into the baffle chamber.

6. The lower case body according to claim 4, wherein a side of the lower case body facing the flow guide member further has a bearing member, the bearing member being connected to the peripheral wall, the bearing member being configured to bear the battery cell.

7. The lower case according to claim 6, wherein the carrier is configured as a sheet-like structure having a plurality of airflow passages arranged at intervals, the number of the airflow passages is equal to or greater than the number of the heat exchanging portions, and each of the heat exchanging portions communicates with at least a portion of one of the airflow passages.

8. The lower box body as claimed in claim 6, wherein a plurality of support members are disposed in the diversion cavity, the support members are spaced apart from each other, the arrangement direction of the support members is perpendicular to the air inlet direction of the diversion cavity, and the support members are configured to support the bearing members and the battery cells.

9. The lower cabinet of claim 8, wherein the support member includes a main support part and a sub support part coupled to each other, and the main support part is arranged in a direction perpendicular to the arrangement direction of the fixing members.

10. The lower case of any one of claims 4 to 7, wherein the baffle further comprises a first securing structure, the lower case further comprises a second securing structure, and the lower case further comprises a fastener connecting the first securing structure and the second securing structure to secure the lower case with the baffle.

11. The bottom box of claim 10, wherein the first securing structure comprises a leaf spring having a first slot, two of the leaf springs being stacked to form a gap;

the second fixing structure is a connecting sheet matched with the gap, and the connecting sheet is provided with a second slotted hole opposite to the first slotted hole;

the fastener comprises a bolt, and the bolt penetrates through the first slotted hole and the second slotted hole so as to fix the lower box body and the flow guide piece.

12. A battery, comprising:

at least one battery cell; and

the lower case of any one of claims 1 to 11, configured to receive the battery cell.

13. An electrical device comprising a battery as claimed in claim 12 for providing electrical energy.