CN216354420U

CN216354420U - Battery box, battery and power consumption device

Info

Publication number: CN216354420U
Application number: CN202122698034.0U
Authority: CN
Inventors: 何润泳
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-04-19
Anticipated expiration: 2031-11-05

Abstract

The application relates to a battery box, battery and power consumption device, the battery box includes: the battery module comprises a bottom plate, side plates and longitudinal beams, wherein the bottom plate and the side plates are surrounded to form a containing groove for containing the battery module, a first flow channel is arranged in the bottom plate, and a first opening communicated with the first flow channel is formed in the inner side surface of the bottom plate; the longitudinal beam is arranged on the inner side surface of the bottom plate and located in the accommodating groove, a second flow channel is arranged inside the longitudinal beam, and a second opening communicated with the second flow channel and correspondingly communicated with the first opening is formed in one side of the longitudinal beam facing the bottom plate. The battery box body is simple in structure, unnecessary pipelines or cooling structures do not need to be added, meanwhile, the second flow channel and the first flow channel are communicated to form a complete cooling flow channel by means of the second opening and the first opening, the contact area of the cooling flow channel and a battery module in the battery box body is greatly increased, and the cooling efficiency of the battery module is improved.

Description

Battery box, battery and power consumption device

Technical Field

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

Background

In order to meet the increasing requirements of high-power discharge and rapid charge, the energy density of the battery is continuously increased, and the heat generated by the battery in the use process is increased, so that a thermal management system is required to be additionally arranged in the battery to cool the battery.

In the related art, the battery is usually cooled by a liquid cooling method, but the liquid cooling method is difficult to ensure a low-complexity liquid cooling pipeline on the premise of ensuring high cooling efficiency.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a battery case, a battery, and an electric device, which are capable of solving the problem that it is difficult to achieve a low-complexity liquid cooling line while ensuring high cooling efficiency in a liquid cooling system.

According to an aspect of the present application, an embodiment of the present application provides a battery case, including: the battery module comprises a bottom plate and side plates, wherein an accommodating groove for accommodating the battery module is formed by the surrounding of the bottom plate and the side plates, a first flow channel is arranged in the bottom plate, and a first opening communicated with the first flow channel is formed in the inner side surface of the bottom plate; and the longitudinal beam is arranged on the inner side surface of the bottom plate and is positioned in the accommodating groove, a second flow channel is arranged in the longitudinal beam, and a second opening which is communicated with the second flow channel and correspondingly communicated with the first opening is arranged on one side of the longitudinal beam facing the bottom plate.

The battery box body is simple in structure, unnecessary pipelines or cooling structures do not need to be added, meanwhile, the second flow channel and the first flow channel are communicated to form a complete cooling flow channel by means of the second opening and the first opening, the contact area of the cooling flow channel and a battery module in the battery box body is greatly increased, and the cooling efficiency of the battery module is improved.

In one embodiment, the stringer comprises: the longitudinal beam body is arranged on the inner side surface of the bottom plate, and the second flow channel penetrates through the longitudinal beam body along the longitudinal extension direction of the longitudinal beam body; and the longitudinal beam plug is matched with the second flow channel in shape and is arranged between the second flow channel and the corresponding side plate in a sealing manner. Such a design can increase the length of the second flow channel to increase the coverage area thereof, thereby further improving the cooling efficiency of the battery module. Meanwhile, the longitudinal beam plug is hermetically arranged between the second flow channel and the corresponding side plate, so that the second flow channel can be sealed, leakage is avoided, and the use reliability of the battery box body is improved.

In one embodiment, the longitudinal beam plug is completely accommodated in the second flow passage; along the longitudinal extension direction of the longitudinal beam body, two ends of the longitudinal beam body are respectively connected with two oppositely arranged side plates; the second opening is arranged on the longitudinal beam body. Connect respectively in two curb plates of relative setting through the both ends with the longeron body for the longeron body can play the supporting role to the curb plate, promotes the structural strength of battery box, and, the longeron body can also play the partition effect to the holding tank of battery box, is convenient for set up a plurality of battery modules simultaneously in the holding tank.

In one embodiment, the longitudinal beam plug part is accommodated in the second flow passage; the second opening is arranged on the longitudinal beam plug, and a third flow passage communicated with the second flow passage and the second opening is further arranged in the longitudinal beam plug. The second opening on the longitudinal beam is arranged on the longitudinal beam plug head through the design, the third flow channel in the longitudinal beam plug head is communicated with the second opening, normal use of the second flow channel is ensured, the second opening does not need to be formed in the longitudinal beam body, the processing difficulty of the longitudinal beam body is reduced, and meanwhile, the structural strength of the longitudinal beam body is also improved.

In one embodiment, a side of the longitudinal beam plug facing the corresponding side plate is provided with a first connecting hole, the side plate is provided with a second connecting hole, and the longitudinal beam body is connected with the side plate through the first connecting hole and the second connecting hole. The connection of longeron body and curb plate is realized with the help of first connecting hole and second connecting hole to such design for installation between longeron body and the curb plate is simpler, convenient with being connected, and this connection structure also need not to occupy extra space simultaneously, has improved the utilization ratio to the battery box inner space.

In one embodiment, the battery box body further comprises a joint, and a through hole penetrating through the joint is formed in the joint; both ends of the joint are sealingly connected to the first opening and the second opening, respectively, in the axial direction of the through-hole. Realize connecting first opening and second opening sealedly through setting up the joint, simple structure, the simple to operate that connects switches on effectually to first opening and second opening.

In one embodiment, the battery case further comprises a gasket; the sealing gasket is arranged at the joint of the joint and the second opening. Through set up sealed the pad in joint and second open-ended junction, improved the leakproofness of second opening part, avoid appearing revealing, promoted the use reliability of battery box.

In one embodiment, a pressing rib is arranged on one side of the longitudinal beam, which is far away from the bottom plate, and the pressing rib is arranged in parallel with the bottom plate and used for abutting against the battery modules in the accommodating groove. Such design makes the pressure rib on the longeron can support the battery module and press in the holding tank, avoids the battery module to break away from the battery box, has promoted the stability of being connected of battery box and battery module. Meanwhile, the connection tightness degree of the battery module and the longitudinal beam can be increased, so that the second flow channel in the longitudinal beam is stably contacted and cooled with the battery module, and the cooling efficiency of the battery module is further improved.

In one embodiment, the stringer includes a plurality of stringers disposed parallel to and spaced apart from each other. Through setting up a plurality of longerons that are parallel to each other and the interval sets up, can play the separation effect to the holding tank of battery box, be convenient for set up a plurality of battery modules simultaneously in the holding tank, simultaneously, two adjacent longerons can press from both sides the battery module and establish between the two, play certain fastening effect to the battery module, have promoted the stability of being connected of battery box and battery module.

According to another aspect of the present application, an embodiment of the present application further provides a battery, including: the battery case as in the above embodiment; and the battery module is accommodated in the accommodating groove.

According to another aspect of the present application, an embodiment of the present application further provides an electrical device, including: such as the battery in the above embodiment.

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

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

fig. 1 is an exploded view of a battery case according to an embodiment of the present disclosure;

FIG. 2 is an enlarged view of a portion of a stringer structure provided in accordance with an embodiment of the present application;

FIG. 3 is a partial cross-sectional view of a battery case provided in accordance with one embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is an exploded view of the overall structure of a battery according to an embodiment of the present application.

The reference numbers in the detailed description are as follows:

10: a battery;

100: battery case, 110: bottom plate, 111: first flow passage, 112: first opening, 120: side plate, 121: second connection hole, 130: side member, 131: second flow passage, 132: second opening, 133: stringer body, 134: stringer plug, 1341: third flow passage, 1342: first connection hole, 135: rib pressing bar, 140: accommodating groove, 150: joint, 151: through-hole, 160: a gasket;

200: a battery module is provided.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that 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 the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

At present, with the development of technology, the application scenarios of power batteries are also more and more extensive, and power batteries are not only applied to energy storage power systems such as hydraulic power, thermal power, 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 power batteries, people gradually put forward higher-level requirements on power batteries such as high-power discharge and quick charge.

The applicant has noticed that in order to adapt and meet the requirements of high power discharge and fast charge, etc., it is necessary to increase the energy density of the battery, and thus the energy transfer efficiency of the battery. However, in this case, the amount of heat generated by the battery during use also increases. The heat accumulation around the battery can reduce the energy transmission efficiency of the battery, shorten the service life of the battery and have certain potential safety hazards.

To mitigate heat build-up around the battery, applicants have discovered that a thermal management system may be incorporated into the battery to cool the battery. For example, set up the cooling runner in the cold plate of battery box bottom, utilize the flow of cooling liquid in the cooling runner to help the battery to dispel the heat, because in this scheme, the cooling runner sets up in the bottom of battery box, only can contact with the bottom of battery module, so need increase the area of contact of cooling runner and battery module as far as possible, in order to improve the radiating efficiency, can adopt for this reason to increase cooling structure such as harmonica pipe in the side of battery module, and carry out the switching with the cooling runner in the cold plate through the switching pipeline. Thus, the heat dissipation efficiency can be improved, but the structure of the whole cooling pipeline is complex, and the reliability is low.

Based on above consideration, in order to solve the liquid cooling mode and be difficult to under the prerequisite of ensureing high cooling efficiency, compromise the problem of the liquid cooling pipeline of low complexity, the applicant is through deep research, a battery box has been designed, through set up first runner in the bottom plate is inside, set up the second runner in longeron inside, moreover, the steam generator is simple in structure, need not to add unnecessary pipeline or cooling structure, and simultaneously, come second runner and first runner intercommunication with the help of second opening and first opening and form complete cooling runner, greatly increased the area of contact of the battery module in cooling runner and the battery box, the cooling efficiency to battery module has been improved.

The battery disclosed in the embodiment of the present application can be used in electric devices such as vehicles, ships or aircrafts, but not limited thereto. The power supply system with the battery forming the electric device disclosed by the application can be used, so that the cooling efficiency of the battery is improved, the battery meets the increasing requirements of high-power discharge, quick charge and the like, and the performance stability and the service life of the battery are improved.

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 mobile 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. The electric vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like. The interior of the automobile is provided with a battery, and the battery can be arranged at the bottom or the head or the tail of the automobile. The battery may be used for powering a vehicle, for example, the battery may be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, the controller being configured to control the battery to power the motor, for example, for start-up, navigation, and operational power requirements of the vehicle. In some embodiments of the present application, the battery can be used not only as an operating power source of an automobile, but also as a driving power source of the automobile, instead of or partially in place of fuel or natural gas to provide driving power for the automobile.

The battery box is used for providing accommodation space for the battery module, and the battery box can adopt multiple structure. In some embodiments, the battery box body can include bottom plate and a plurality of curb plate, and a plurality of curb plate is first connected each other, and the bottom plate is connected in the bottom of every curb plate and encloses the accommodation space who is used for holding the battery module with the curb plate jointly, and bottom plate and curb plate enclose to establish promptly and form the holding tank. Of course, the receiving groove formed by the bottom plate and the side plate may have various shapes, for example, a cylinder, a rectangular parallelepiped, etc.

The battery monomer is the minimum unit of the battery, in the battery, a plurality of battery monomers can be arranged, the plurality of battery monomers can be connected in series or in parallel or in series-parallel, and the series-parallel connection refers to the series connection and the parallel connection of the plurality of battery monomers. The plurality of battery monomers can be directly connected in series or in parallel or in series-parallel to form a battery module and are accommodated in the battery box body; of course, a plurality of battery cells may be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a battery module and accommodated in the battery box. The battery may further include other structures, for example, the battery may further include a bus member for achieving electrical connection between the plurality of battery cells. Wherein, each battery cell can be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell can be in a cylinder, a flat body, a cuboid or other shapes.

According to some embodiments of the present application, referring to fig. 1 to 4, fig. 1 is an exploded view of a structure of a battery case provided in an embodiment of the present application, fig. 2 is a partially enlarged view of a stringer structure provided in an embodiment of the present application, fig. 3 is a partially cross-sectional view of the battery case provided in an embodiment of the present application, and fig. 4 is a partially enlarged view at a in fig. 3.

The embodiment of the application provides a battery box 100, which comprises a bottom plate 110, side plates 120 and longitudinal beams 130, wherein the bottom plate 110 and the side plates 120 are surrounded to form an accommodating groove 140 for accommodating a battery module 200, a first flow channel 111 is arranged inside the bottom plate 110, and a first opening 112 communicated with the first flow channel 111 is arranged on the inner side surface of the bottom plate 110; the longitudinal beam 130 is disposed on the inner side surface of the bottom plate 110 and located in the receiving groove 140, a second flow channel 131 is disposed inside the longitudinal beam 130, and a second opening 132 communicated with the second flow channel 131 and correspondingly communicated with the first opening 112 is disposed on one side of the longitudinal beam 130 facing the bottom plate 110.

The number of the side plates 120 may be several, such as two, three, etc., the side plates 120 are connected end to form a relatively closed frame, openings are formed at two sides of the frame, and the bottom plate 110 covers the opening at the bottom of the frame to isolate the internal environment of the frame from the external environment. The inner environment of the housing, i.e., the receiving groove 140, can be used for the components of the battery module 200, the cooling system, and the like. The bottom plate 110 and the side plate 120 may be separate members, and the bottom plate 110 and the side plate 120 may be integrated without limitation. The frame surrounded by the side plates 120 may have various shapes and sizes, such as a rectangular parallelepiped shape, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the frame body may be determined according to the specific shape and size of the battery module 200. Without limitation, the shape of the base plate 110 may be adapted to the shape of the frame to fit the frame. Thus, the battery case 100 is not easily deformed when being crushed and collided, and the battery case 100 has higher structural strength.

The longitudinal beam 130 is disposed on the inner side surface of the bottom plate 110 and located in the receiving groove 140, and the longitudinal beam 130 can reinforce the structures of the bottom plate 110 and the side plate 120 to improve the overall structural strength of the battery case 100, and meanwhile, the longitudinal beam 130 can also serve to partition the receiving groove 140, so as to better dispose the battery module 200 in the receiving groove 140. The mounting direction and mounting position of the longitudinal beam 130 on the base plate 110, and the connection mode between the longitudinal beam 130 and the base plate 110 are not limited.

The material of the bottom plate 110, the side plate 120 and the longitudinal beam 130 may also be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment. In some embodiments, an insulator may also be provided on the inner side of the bottom plate 110, the side plates 120, and the longitudinal beams 130, and the insulator may be used to isolate the electrical connection members within the battery case 100 from the bottom plate 110, the side plates 120, and the longitudinal beams 130 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The bottom plate 110 is provided therein with a first flow channel 111, the first flow channel 111 is a channel opened in the bottom plate 110 for fluid to flow through, and the first flow channel 111 can confine the fluid therein to make the fluid flow in a specific direction. Meanwhile, a second flow passage 131 is formed inside the longitudinal beam 130, and the second flow passage 131 is a passage opened inside the longitudinal beam 130 for fluid to flow through, and can confine the fluid therein to enable the fluid to flow in a specific direction.

Further, the inner side surface of the bottom plate 110 is provided with a first opening 112 communicating with the first flow channel 111, and the first opening 112 communicates with the first flow channel 111 so that the fluid in the first flow channel 111 can flow out from the first opening 112 or the fluid can flow into the first flow channel 111 from the first opening 112. The side of the longitudinal beam 130 facing the bottom plate 110 is provided with a second opening 132 communicating with the second flow channel 131 and correspondingly communicating with the first opening 112, the second opening 132 is communicated with the second flow channel 131, so that the fluid in the second flow channel 131 can flow out from the second opening 132, or the fluid can flow into the second flow channel 131 from the second opening 132, and the second opening 132 is also correspondingly communicated with the first opening 112, so that the first flow channel 111 and the second flow channel 131 are integrally communicated through the first opening 112 and the second opening 132.

The cross-sectional shapes, cross-sectional dimensions, extending directions, and the like of the first flow channel 111 and the second flow channel 131 are not limited to those described above, and the cross-sectional shapes, cross-sectional dimensions, opened positions, and the like of the first opening 112 and the second opening 132 are also not limited to those described above.

During the use, because first runner 111 and second runner 131 intercommunication form complete cooling runner, can pack heat-conducting fluid in this cooling runner, heat-conducting fluid flows when cooling runner is interior, respectively through the bottom and the side of battery module 200, absorbs the heat that gives off battery module 200 and takes away, flows to the bottom and the side that flow through battery module 200 again after the cooling of outside heat dissipation, forms the circulation to play cooling, the cooling effect to battery module 200.

According to the battery box body 100, the first flow channel 111 is arranged in the bottom plate 110, the second flow channel 131 is arranged in the longitudinal beam 130, the structure is simple, redundant pipelines or cooling structures are not required to be additionally arranged, meanwhile, the second flow channel 131 is communicated with the first flow channel 111 through the second opening 132 and the first opening 112 to form a complete cooling flow channel, the contact area between the cooling flow channel and the battery module 200 in the battery box body 100 is greatly increased, and the cooling efficiency of the battery module 200 is improved.

In some embodiments, optionally, the longitudinal beam 130 includes a longitudinal beam body 133 and a longitudinal beam plug 134 matching with the shape of the second flow channel 131, the longitudinal beam body 133 is disposed on the inner side surface of the bottom plate 110, and the second flow channel 131 penetrates through the longitudinal beam body 133 along the longitudinal extension direction of the longitudinal beam body 133; the stringer plugs 134 are sealingly disposed between the second flow channels 131 and the corresponding side plates 120.

The side member body 133 is a main body member structure of the side member 130, and the second flow path 131 penetrating the side member body 133 is provided inside the side member body 133, and it should be noted that the side member body 133 may be a hollow structure, and the entire hollow structure may be the second flow path 131, or the hollow structure may be partitioned to form a plurality of cavities spaced from each other as the plurality of second flow paths 131. Because the second flow channel 131 penetrates through the longitudinal beam body 133, the end of the longitudinal beam body 133 needs to be sealed by the longitudinal beam plug 134 to avoid leakage, and the shape and size of the longitudinal beam plug 134 are matched with the hollow structure in the longitudinal beam body 133 to completely seal the longitudinal beam body 133, so that the second flow channel 131 can only be communicated with the outside (the first flow channel 111) through the second opening 132, and the sealing performance of the second flow channel 131 is improved.

Such a design can increase the length of the second flow channel 131 to increase the coverage area thereof, thereby further improving the cooling efficiency of the battery module 200. Meanwhile, the longitudinal beam plugs 134 are hermetically arranged between the second flow channels 131 and the corresponding side plates 120, so that the second flow channels 131 can be sealed, leakage is avoided, and the use reliability of the battery box 100 is improved.

In some embodiments, optionally, stringer plug 134 is housed entirely within second flow channel 131; along the longitudinal extension direction of the longitudinal beam body 133, two ends of the longitudinal beam body 133 are respectively connected to the two side plates 120 which are oppositely arranged; the second opening 132 is disposed on the longitudinal beam body 133.

The longitudinal beam body 133 is completely accommodated in the second flow channel 131, which means that the longitudinal beam plug 134 does not protrude out of the second flow channel 131 relative to the longitudinal beam body 133, and the end surface of the longitudinal beam plug 134 is flush with the end surface of the longitudinal beam body 133, or the end surface of the longitudinal beam plug 134 is flush with the end surface of the longitudinal beam body 133 and is recessed into the second flow channel 131. The two ends of the longitudinal beam body 133 are respectively connected to the two oppositely disposed side plates 120, and the connection manner between the longitudinal beam body 133 and the side plates 120 is not limited, and for example, welding, screwing, gluing, and the like may be adopted.

Through connecting the both ends of longeron body 133 respectively in two curb plates 120 of relative setting for longeron body 133 can play the supporting role to curb plate 120, promotes battery box 100's structural strength, and longeron body 133 can also play the partition effect to battery box 100's holding tank 140, is convenient for set up a plurality of battery module 200 simultaneously in holding tank 140.

Referring to fig. 3 and 4, in some embodiments, stringer plug 134 is optionally partially received within second flow channel 131; the second opening 132 is disposed on the longitudinal beam plug 134, and a third flow channel 1341 communicating the second flow channel 131 and the second opening 132 is further disposed in the longitudinal beam plug 134.

The longitudinal beam plug 134 is partially accommodated in the second flow channel 131, which means that one end of the longitudinal beam plug 134 is accommodated in the second flow channel 131, and the other end of the longitudinal beam plug 134 protrudes out of the second flow channel 131, and the protruding degree of the longitudinal beam plug 134 is not limited. The third flow passage 1341 is a passage opened inside the longitudinal beam plug 134 for fluid to flow through, and the third flow passage 1341 can confine the fluid therein so that the fluid flows in a specific direction. Meanwhile, the third flow passage 1341 communicates with the second flow passage 131 and the second opening 132, that is, the second opening 132 communicates with not only the second flow passage 131 but also the third flow passage 1341 at the same time, so that the fluid in the third flow passage 1341 can flow out from the second opening 132, or the fluid can flow into the third flow passage 1341 from the second opening 132.

Due to the design, the second opening 132 on the longitudinal beam 130 is arranged on the longitudinal beam plug 134, the second opening 132 is communicated with the second flow channel 131 through the third flow channel 1341 in the longitudinal beam plug 134, normal use of the second flow channel 131 is ensured, the second opening 132 does not need to be arranged on the longitudinal beam body 133, the processing difficulty of the longitudinal beam body 133 is reduced, and meanwhile, the structural strength of the longitudinal beam body 133 is improved.

Referring to fig. 1 to fig. 2, in some embodiments, optionally, a first connection hole 1342 is formed on one side of the longitudinal beam plug 134 facing the corresponding side plate 120, a second connection hole 121 is formed on the side plate 120, and the longitudinal beam body 133 is connected to the side plate 120 through the first connection hole 1342 and the second connection hole 121.

It can be understood that the first connecting hole 1342 and the second connecting hole 121 are used to assist in achieving the connection between the longitudinal beam plug 134 and the side plate 120, and the first connecting hole 1342 and the second connecting hole 121 may be circular holes, square holes, threaded holes, etc., and the shape, the aperture, the number, etc. of the first connecting hole 1342 and the second connecting hole 121 are not limited.

The connection between the longitudinal beam body 133 and the side plate 120 is realized by means of the first connecting hole 1342 and the second connecting hole 121, so that the installation and the connection between the longitudinal beam body 133 and the side plate 120 are simpler and more convenient, and meanwhile, the connection structure does not need to occupy extra space, thereby improving the utilization rate of the space in the battery box 100.

In some embodiments, optionally, the battery case 100 further includes a joint 150, and a through hole 151 is formed in the joint 150; both ends of the joint 150 are sealingly connected to the first opening 112 and the second opening 132, respectively, in the axial direction of the through-hole 151.

The joint 150 may be used to connect two objects, and in this embodiment, both ends of the joint 150 are hermetically connected to the first opening 112 and the second opening 132, respectively, to realize the communication between the first opening 112 and the second opening 132. The joint 150 is hermetically connected to the first opening 112 and the second opening 132, which means that the joint 150 can directly or indirectly block the first opening 112 and the second opening 132 through other components to prevent leakage at the connection position.

The first opening 112 and the second opening 132 are hermetically connected by the joint 150, so that the structure is simple, the joint 150 is convenient to mount, and the conduction effect on the first opening 112 and the second opening 132 is good.

In some embodiments, optionally, the battery case 100 further includes a gasket 160; the gasket 160 is disposed at the junction of the joint 150 and the second opening 132.

The gasket 160 is a sealing spare part used for parts of machinery, equipment, pipes, etc., for sealing connection between pipes, sealing connection between machine parts of equipment, etc. The gasket 160 is made of a metal or non-metal plate material by cutting, stamping, or cutting, and may be divided into a metal gasket 160 sheet and a non-metal gasket 160 sheet according to the material. The metal gasket comprises a copper gasket, a stainless steel gasket, an iron gasket, an aluminum gasket and the like. Non-metal asbestos gaskets, non-asbestos gaskets, paper gaskets, rubber gaskets, and the like.

By arranging the sealing gasket 160 at the joint of the joint 150 and the second opening 132, the sealing performance of the second opening 132 is improved, leakage is avoided, and the use reliability of the battery case 100 is improved.

In some embodiments, optionally, the side of the longitudinal beam 130 facing away from the bottom plate 110 is provided with a pressing rib 135, and the pressing rib 135 is disposed parallel to the bottom plate 110 for pressing against the battery module 200 in the receiving groove 140.

The hold-down bar 135 is a length of strip-like structure extending from the longitudinal beam 130 and located on the side of the longitudinal beam 130 facing away from the base plate 110. Because longeron 130 sets up on bottom plate 110 to press muscle strip 135 and bottom plate 110 parallel arrangement, just enclose between muscle strip 135, longeron 130 major structure and the bottom plate 110 and establish and form an installation space that is used for installing battery module 200, can play fixed, spacing effect to battery module 200. The shape, size, and degree of protrusion of the bead 135 are not limited.

Due to the design, the pressing ribs 135 on the longitudinal beams 130 can press the battery module 200 in the accommodating grooves 140, so that the battery module 200 is prevented from being separated from the battery box 100, and the connection stability of the battery box 100 and the battery module 200 is improved. Meanwhile, the tightness of the connection between the battery module 200 and the longitudinal beam 130 can be increased, so that the second flow channel 131 in the longitudinal beam 130 is stably contacted and cooled with the battery module 200, and the cooling efficiency of the battery module 200 is further improved.

In some embodiments, optionally, stringer 130 comprises a plurality of stringers 130 disposed parallel to and spaced apart from one another.

The number of the longitudinal beams 130 can be set reasonably according to the size of the accommodating groove 140 in the battery case 100, and particularly, as shown in the embodiment shown in fig. 1, the number of the longitudinal beams 130 is three, and three longitudinal beams 130 are arranged in parallel and at intervals along the direction perpendicular to the longitudinal extension direction of the three longitudinal beams 130. Of course, in other embodiments, the number of the longitudinal beams 130 may also be four, five, etc., and will not be described herein again.

Through setting up a plurality of longerons 130 that are parallel to each other and the interval sets up, can play the separation effect to holding tank 140 of battery box 100, be convenient for set up a plurality of battery modules 200 simultaneously in holding tank 140, simultaneously, two adjacent longerons 130 can press from both sides battery module 200 and establish between the two, play certain fastening effect to battery module 200, have promoted battery box 100 and battery module 200's stability of being connected.

Fig. 5 is an exploded view of the overall structure of the battery 10 according to an embodiment of the present application.

According to another aspect of the present application, referring to fig. 5, an embodiment of the present application further provides a battery 10, which includes the battery case 100 and the battery module 200 as in the previous embodiments, wherein the battery module 200 is accommodated in the accommodating groove 140.

The bottom plate 110 and the side plate 120 of the battery case 100 enclose a receiving groove 140 for receiving the battery module 200, the bottom plate 110 is provided with a first flow channel 111 therein, and the inner side surface of the bottom plate 110 is provided with a first opening 112 communicating with the first flow channel 111. The longitudinal beam 130 is disposed on the inner side surface of the bottom plate 110 and located in the receiving groove 140, a second flow channel 131 is disposed inside the longitudinal beam 130, and a second opening 132 communicated with the second flow channel 131 and correspondingly communicated with the first opening 112 is disposed on one side of the longitudinal beam 130 facing the bottom plate 110.

The battery module 200 includes a plurality of battery cells connected in series or in parallel or in series-parallel, the battery module 200 is accommodated in the accommodating groove 140, at least one side of the battery module 200 is attached to the longitudinal beam 130, and the plurality of battery cells in the battery module 200 are arranged side by side along the longitudinal extension direction of the longitudinal beam 130, so when the heat transfer fluid flows in the cooling flow channel, the heat transfer fluid respectively flows through the bottom and the side of each battery cell in the battery module 200, absorbs and takes away the heat emitted by the battery module 200, and flows to the bottom and the side of the battery module 200 after external heat dissipation and temperature reduction, thereby forming a circulation, and achieving the cooling and temperature reduction effects on the battery module 200.

According to yet another aspect of the present application, an electrical device is also provided, which includes the battery 10 as in the above embodiments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A battery case (100), comprising:

the battery module comprises a bottom plate (110) and side plates (120), wherein an accommodating groove (140) for accommodating a battery module (200) is formed by the surrounding of the bottom plate (110) and the side plates (120), a first flow channel (111) is arranged in the bottom plate (110), and a first opening (112) communicated with the first flow channel (111) is formed in the inner side surface of the bottom plate (110); and

the longitudinal beam (130) is arranged on the inner side surface of the bottom plate (110) and located in the accommodating groove (140), a second flow channel (131) is arranged inside the longitudinal beam (130), and a second opening (132) which is communicated with the second flow channel (131) and correspondingly communicated with the first opening (112) is arranged on one side, facing the bottom plate (110), of the longitudinal beam (130).

2. The battery box (100) of claim 1, wherein the stringers (130) comprise:

the longitudinal beam body (133) is arranged on the inner side surface of the bottom plate (110), and the second flow channel (131) penetrates through the longitudinal beam body (133) along the longitudinal extension direction of the longitudinal beam body (133);

and the longitudinal beam plugs (134) are matched with the second flow channels (131) in shape, and the longitudinal beam plugs (134) are hermetically arranged between the second flow channels (131) and the corresponding side plates (120).

3. The battery case (100) of claim 2, wherein the stringer plug (134) is fully received within the second flow channel (131);

along the longitudinal extension direction of the longitudinal beam body (133), two ends of the longitudinal beam body (133) are respectively connected to the two side plates (120) which are oppositely arranged;

wherein the second opening (132) is provided on the side member body (133).

4. The battery case (100) of claim 2, wherein the stringer plug (134) is partially received in the second flow channel (131);

the second opening (132) is arranged on the longitudinal beam plug (134), and a third flow passage (1341) communicated with the second flow passage (131) and the second opening (132) is further arranged in the longitudinal beam plug (134).

5. The battery box (100) according to any one of claims 2 to 4, wherein a side of the longitudinal beam plug (134) facing the corresponding side plate (120) is provided with a first connecting hole (1342), the side plate (120) is provided with a second connecting hole (121), and the longitudinal beam body (133) is connected with the side plate (120) by means of the first connecting hole (1342) and the second connecting hole (121).

6. The battery box (100) of claim 5, wherein the battery box (100) further comprises a connector (150), and a through hole (151) is formed in the connector (150) and penetrates through the connector;

both ends of the joint (150) are sealingly connected to the first opening (112) and the second opening (132), respectively, in an axial direction of the through hole (151).

7. The battery case (100) of claim 6, wherein the battery case (100) further comprises a gasket (160);

the sealing gasket (160) is arranged at the joint of the joint (150) and the second opening (132).

8. The battery box (100) according to any one of claims 1 to 4, wherein a side of the longitudinal beam (130) facing away from the bottom plate (110) is provided with a pressing rib (135), and the pressing rib (135) is arranged in parallel with the bottom plate (110) and is used for pressing the battery modules (200) in the accommodating groove (140).

9. The battery box (100) of any of claims 1-4, characterized in that the stringer (130) comprises a plurality of stringers (130) arranged parallel to and spaced apart from each other.

10. A battery (10), comprising:

the battery case (100) according to any one of claims 1 to 9; and

and the battery module (200) is accommodated in the accommodating groove (140).

11. An electric device, comprising: the battery (10) of claim 10.