CN216354420U - Battery box, battery and power consumption device - Google Patents

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 electrical device

technical field

The present application relates to the technical field of batteries, and in particular, to a battery case, a battery and an electrical device.

Background technique

In order to meet the increasing demand for high-power discharge and fast charging, the energy density of the battery is constantly improving, and the heat generated by the battery during use is also increasing. Therefore, it is necessary to install a thermal management system in the battery. Cool down.

In the related art, liquid cooling is usually used to cool the battery, but it is difficult for the liquid cooling method to take into account low-complexity liquid cooling pipelines while ensuring high cooling efficiency.

Utility model content

Based on this, it is necessary to provide a battery box, a battery and an electrical device in order to solve the problem that the liquid cooling method is difficult to ensure high cooling efficiency while taking into account the low complexity of the liquid cooling pipeline.

According to an aspect of the present application, an embodiment of the present application provides a battery box, comprising: a bottom plate and a side plate, the bottom plate and the side plate enclose a receiving groove for accommodating a battery module, and a first flow channel is arranged inside the bottom plate , the inner surface of the bottom plate is provided with a first opening communicating with the first flow channel; and the longitudinal beam is arranged on the inner surface of the bottom plate and is located in the accommodating groove, the longitudinal beam is provided with a second flow channel inside, and the longitudinal beam faces one of the bottom plate. The side is provided with a second opening communicating with the second flow channel and correspondingly communicating with the first opening.

The above-mentioned battery box has a simple structure by arranging a first flow channel inside the bottom plate and a second flow channel inside the longitudinal beam, and does not need to add redundant pipelines or cooling structures. The second flow channel communicates with the first flow channel to form a complete cooling flow channel, which greatly increases the contact area between the cooling flow channel and the battery module in the battery box, and improves the cooling efficiency of the battery module.

In one of the embodiments, the longitudinal beam includes: a longitudinal beam body disposed on the inner surface of the bottom plate, along the longitudinal extension direction of the longitudinal beam body, the second flow channel penetrates through the longitudinal beam body; the shape of the second flow channel matches The longitudinal beam plug is sealingly arranged between the second flow channel and the corresponding side plate. Such a design can increase the length of the second flow channel to increase its coverage area, thereby further improving the cooling efficiency of the battery module. At the same time, the longitudinal beam plug is sealed between the second flow channel and the corresponding side plate, which can seal the second flow channel, avoid leakage, and improve the use reliability of the battery box.

In one embodiment, the longitudinal beam plug is completely accommodated in the second flow channel; along the longitudinal extension direction of the longitudinal beam body, both ends of the longitudinal beam body are respectively connected to two opposite side plates; wherein the second The opening is arranged on the longitudinal beam body. By connecting the two ends of the longitudinal beam body to the two opposite side plates, the longitudinal beam body can support the side plates, improve the structural strength of the battery box, and the longitudinal beam body can also support the battery box. The accommodating grooves of the body play a role of separation, which is convenient for arranging a plurality of battery modules in the accommodating grooves at the same time.

In one of the embodiments, the longitudinal beam plug is partially accommodated in the second flow channel; the second opening is provided on the longitudinal beam plug, and the longitudinal beam plug is further provided with a third channel that communicates with the second flow channel and the second opening. runner. Such a design enables the second opening on the longitudinal beam to be arranged on the longitudinal beam plug, and the communication between the second opening and the second flow channel is realized through the third flow channel in the longitudinal beam plug, so as to ensure the normal operation of the second flow channel. The utility model is used, and there is no need to open a second opening on the longitudinal beam body, which reduces the processing difficulty of the longitudinal beam body, and at the same time improves the structural strength of the longitudinal beam body.

In one of the embodiments, the side of the longitudinal beam plug facing the corresponding side plate is provided with a first connection hole, the side plate is provided with a second connection hole, and the longitudinal beam body is connected by means of the first connection hole and the second connection hole The hole is connected to the side plate. Such a design realizes the connection between the longitudinal beam body and the side plate by means of the first connection hole and the second connection hole, which makes the installation and connection between the longitudinal beam body and the side plate simpler and more convenient, and at the same time, the connection structure does not need to occupy additional space, which improves the utilization rate of the space inside the battery box.

In one embodiment, the battery case further includes a joint, and the joint is provided with a through hole therethrough; along the axial direction of the through hole, both ends of the joint are sealedly connected to the first opening and the second opening, respectively. The first opening and the second opening are sealedly connected by arranging the joint, the structure is simple, the installation of the joint is convenient, and the conduction effect of the first opening and the second opening is good.

In one of the embodiments, the battery case further includes a sealing gasket; the sealing gasket is arranged at the connection between the joint and the second opening. By arranging a sealing gasket at the connection between the joint and the second opening, the sealing performance of the second opening is improved, leakage is avoided, and the use reliability of the battery box is improved.

In one embodiment, the side of the longitudinal beam away from the bottom plate is provided with a rib, and the rib is arranged in parallel with the bottom plate, so as to press against the battery module in the accommodating groove. Such a design enables the rib on the longitudinal beam to press the battery module into the accommodating groove, preventing the battery module from being separated from the battery box, and improving the connection stability between the battery box and the battery module. At the same time, it can also increase the tightness of the connection between the battery module and the longitudinal beam, so that the second flow channel in the longitudinal beam can maintain stable contact and cooling with the battery module, and further improve the cooling efficiency of the battery module.

In one embodiment, the stringer includes a plurality of stringers arranged parallel to and spaced apart from each other. By arranging a plurality of longitudinal beams parallel to each other and spaced apart, the accommodating groove of the battery box can be separated, so that a plurality of battery modules can be placed in the accommodating groove at the same time, and at the same time, two adjacent longitudinal beams can The battery module is sandwiched between the two, which has a certain fastening effect on the battery module and improves the connection stability between the battery box and the battery module.

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

According to yet another aspect of the present application, an embodiment of the present application further provides an electrical device, including: a battery as in the foregoing embodiments.

The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present application more obvious and easy to understand , and the specific embodiments of the present application are listed below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for purposes of illustrating preferred embodiments only and are not to be considered limiting of the application. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a structural exploded view of a battery case provided by an embodiment of the application;

FIG. 2 is a partial enlarged view of a longitudinal beam structure provided by an embodiment of the present application;

3 is a partial cross-sectional view of a battery case provided by an embodiment of the present application;

Fig. 4 is the partial enlarged view of A place in Fig. 3;

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

The reference numerals in the specific embodiment are as follows:

10: battery;

100: Battery box, 110: Bottom plate, 111: First flow channel, 112: First opening, 120: Side plate, 121: Second connecting hole, 130: Longitudinal beam, 131: Second flow channel, 132: Second Opening, 133: Stringer body, 134: Stringer plug, 1341: Third runner, 1342: First connecting hole, 135: Beading strip, 140: Receiving groove, 150: Joint, 151: Through hole, 160 : gasket;

200: Battery module.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be 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. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

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

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element 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 similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

At present, with the development of technology, the application scenarios of power batteries are becoming more and more extensive. Vehicles, electric vehicles and other electric vehicles, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, people gradually put forward higher-level requirements for power batteries such as high-power discharge and fast charging.

The applicant has noticed that in order to meet and meet the requirements of high-power discharge and fast charging, it is necessary to increase the energy density of the battery, thereby improving the energy transmission efficiency of the battery. But in this way, the heat generated by the battery will also increase during use. The accumulation of heat around the battery will reduce the energy transmission efficiency of the battery, shorten the service life of the battery, and there are certain safety hazards.

In order to alleviate the heat accumulation around the battery, the applicant has researched and found that a thermal management system can be installed in the battery to cool the battery. For example, a cooling channel is arranged in the cold plate at the bottom of the battery box, and the flow of cooling liquid in the cooling channel is used to help the battery to dissipate heat. The bottom of the battery module is in contact, so it is necessary to increase the contact area between the cooling channel and the battery module as much as possible to improve the heat dissipation efficiency. Connect it with the cooling channel in the cold plate. Although the heat dissipation efficiency can be improved in this way, the overall cooling pipeline structure is complicated and the reliability is low.

Based on the above considerations, in order to solve the problem that the liquid cooling method is difficult to ensure high cooling efficiency and take into account the low complexity of the liquid cooling pipeline, the applicant has designed a battery box after in-depth research. The first flow channel is arranged, and the second flow channel is arranged inside the longitudinal beam. The structure is simple, and there is no need to add redundant pipelines or cooling structures. At the same time, the second flow channel and the first flow channel are connected by the second opening and the first opening to form The complete cooling flow channel greatly increases the contact area between the cooling flow channel and the battery module in the battery box, and improves the cooling efficiency of the battery module.

The batteries disclosed in the embodiments of the present application can be used, but not limited to, in electrical devices such as vehicles, ships, or aircraft. The power supply system of the electric device can be formed by using the battery disclosed in the present application, which is beneficial to improve the cooling efficiency of the battery, make the battery meet the increasing demands for high-power discharge and fast charging, and improve the stability of the battery performance. and battery life.

The embodiment of the present application provides an electrical device using a battery as a power source, and the electrical 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 vehicle, a ship, a spacecraft, and the like. The electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spaceships. Electric vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. The interior of the car is provided with a battery, and the battery can be placed at the bottom or head or tail of the car. The battery can be used to power the car, for example, the battery can be used as the operating power source of the car. The car may also include a controller and a motor for controlling the battery to power the motor, eg, for starting, navigating, and driving the car for work power requirements. In some embodiments of the present application, the battery can not only be used as the operating power source of the automobile, but also can be used as the driving power source of the automobile, and can replace or partially replace the fuel or natural gas to provide the driving power for the automobile.

The battery box is used to provide accommodation space for the battery module, and the battery box can adopt various structures. In some embodiments, the battery box may include a bottom plate and a plurality of side plates, the plurality of side plates are connected to each other in the first place, the bottom plate is connected to the bottom of each side plate, and together with the side plates defines a space for accommodating the battery module. The accommodating space, that is, the bottom plate and the side plate are surrounded to form an accommodating groove. Of course, the accommodating groove formed by the bottom plate and the side plate may be in various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

A battery cell refers to the smallest unit that constitutes a battery. In a battery, there can be multiple battery cells, and multiple battery cells can be connected in series or in parallel or mixed. In series and in parallel. Multiple battery cells can be directly connected in series or in parallel or mixed together to form a battery module, which is accommodated in the battery box; of course, multiple battery cells can also be connected in series or in parallel or mixed to form a battery module. A plurality of battery modules are then connected in series or in parallel or mixed to form a battery module, which is accommodated in the battery box. The battery may also include other structures, for example, the battery may further include a bus component for realizing electrical connection between a plurality of battery cells. Wherein, each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cells can be cylindrical, flat, rectangular, or other shapes.

According to some embodiments of the present application, referring to FIGS. 1 to 4 , FIG. 1 is an exploded view of the structure of a battery box provided by an embodiment of the present application, and FIG. 2 is a partial enlarged view of a longitudinal beam structure provided by an embodiment of the present application, FIG. 3 is a partial cross-sectional view of a battery case provided by an embodiment of the present application, and FIG. 4 is a partial enlarged view of part A in FIG. 3 .

The embodiment of the present application provides a battery box 100 , which includes a bottom plate 110 , a side plate 120 and a longitudinal beam 130 . The bottom plate 110 and the side plate 120 enclose a accommodating groove 140 for accommodating the battery module 200 . There is a first flow channel 111, and the inner surface of the bottom plate 110 is provided with a first opening 112 that communicates with the first flow channel 111; the longitudinal beam 130 is arranged on the inner surface of the bottom plate 110 and is located in the accommodating groove 140, and the longitudinal beam 130 is provided with a first opening 112. For the second flow channel 131 , 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 number of the side plates 120 can be several, such as two, three, etc. The several side plates 120 are connected end to end to form a relatively closed frame body, the two sides of the frame body are open, and the bottom plate 110 is covered with the The opening at the bottom of the frame body isolates the internal environment of the frame body from the external environment. The internal environment of the frame, that is, the accommodating groove 140, can be used for components such as the battery module 200 and the cooling system. The bottom plate 110 and the side plate 120 may be independent components, and without limitation, the bottom plate 110 and the side plate 120 may be integrated. The frame formed by the side plate 120 can be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal and so on. Specifically, the shape of the frame body can be determined according to the specific shape and size of the battery module 200 . Without limitation, the shape of the bottom plate 110 can be adapted to the shape of the frame to fit the frame. In this way, the battery case 100 is not easily deformed when being squeezed and collided, so that the battery case 100 has higher structural strength.

The longitudinal beam 130 is disposed on the inner surface of the bottom plate 110 and is located in the accommodating groove 140. The longitudinal beam 130 can reinforce the structure of the bottom plate 110 and the side plate 120 to enhance the overall structural strength of the battery box 100. At the same time, the longitudinal beam 130 can also lift the to separate the accommodating groove 140 , so as to better set the function of the battery module 200 in the accommodating groove 140 . The installation direction and installation position of the longitudinal beam 130 on the bottom plate 110 and the connection method of the longitudinal beam 130 and the bottom plate 110 are not limited.

The materials of the bottom plate 110 , the side plates 120 and the longitudinal beams 130 may also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in this embodiment of the present application. In some embodiments, insulating members may also be provided on the inner sides of the bottom plate 110 , the side plates 120 and the longitudinal beams 130 , and the insulating members may be used to isolate the electrical connection components in the battery box 100 from the bottom plate 110 , the side plates 120 and the longitudinal beams 130 . beam 130 to reduce the risk of short circuits. Illustratively, the insulating member may be plastic, rubber, or the like.

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

In addition, the inner surface of the bottom plate 110 is provided with a first opening 112 that communicates 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 It 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 that communicates with the second flow channel 131 and communicates with the first opening 112 correspondingly. The second opening 132 communicates with the second flow channel 131 so that the second flow channel 131 The fluid inside 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 in corresponding communication with the first opening 112, so the first flow channel 111 and the first The second flow channel 131 is also communicated integrally through the first opening 112 and the second opening 132 .

It should be noted that the cross-sectional shape, cross-sectional size and extension direction of the first flow channel 111 and the second flow channel 131 are not limited here. Meanwhile, the cross-sectional shape and cross-sectional size of the first opening 112 and the second opening 132 , the opening location, etc. are also not limited.

During use, since the first flow channel 111 and the second flow channel 131 are connected to form a complete cooling flow channel, the cooling flow channel can be filled with heat-conducting fluid. When the heat-conducting fluid flows in the cooling flow channel, it flows through the bottom of the battery module 200 respectively. And the side, the heat emitted by the battery module 200 is absorbed and taken away, and then flows to the bottom and sides of the battery module 200 after cooling and cooling, forming a cycle to cool the battery module 200. Cooling effect.

The above-mentioned battery box 100 has a simple structure by arranging the first flow channel 111 inside the bottom plate 110 and the second flow channel 131 inside the longitudinal beam 130, and does not need to add redundant pipelines or cooling structures. The first opening 112 connects the second flow channel 131 with the first flow channel 111 to form a complete cooling flow channel, which greatly increases the contact area between the cooling flow channel and the battery module 200 in the battery box 100 and improves the resistance to the battery module. Cooling efficiency of group 200.

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

The longitudinal beam body 133 refers to the main beam structure of the longitudinal beam 130 , and the longitudinal beam body 133 is provided with a second flow channel 131 penetrating it. It should be noted that the longitudinal beam body 133 may be a hollow structure, and the hollow structure as a whole is For the second flow channel 131 , the hollow structure can also be divided into a plurality of cavities spaced apart from each other to serve as a plurality of second flow channels 131 . Since the second flow channel 131 penetrates through the longitudinal beam body 133 , a longitudinal beam plug 134 is also required to block the end of the longitudinal beam body 133 to avoid leakage. The shape and size of the longitudinal beam plug 134 are the same as the longitudinal beam body. The hollow structures in 133 are matched to completely block the longitudinal beam body 133 , so that the second flow channel 131 can communicate with the outside world (the first flow channel 111 ) only through the second opening 132 , thereby improving the sealing performance of the second flow channel 131 .

Such a design can increase the length of the second flow channel 131 to increase its coverage area, thereby further improving the cooling efficiency of the battery module 200 . At the same time, the longitudinal beam plug 134 is sealed between the second flow channel 131 and the corresponding side plate 120 , which can seal the second flow channel 131 to avoid leakage and improve the reliability of the battery box 100 in use. sex.

In some embodiments, optionally, the longitudinal beam plug 134 is completely accommodated in the second flow channel 131; along the longitudinal extension direction of the longitudinal beam body 133, both ends of the longitudinal beam body 133 are respectively connected to two oppositely disposed two Each side plate 120 ; wherein, the second opening 132 is provided 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 . The end surface of the beam body 133 is flush, 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 opposite side plates 120 . The connection method of the longitudinal beam body 133 and the side plates 120 is not limited, for example, welding, screwing, gluing and the like can be used.

By connecting the two ends of the longitudinal beam body 133 to the two opposite side plates 120 respectively, the longitudinal beam body 133 can support the side plates 120 and improve the structural strength of the battery box 100 . 133 can also play a role in separating the accommodating grooves 140 of the battery case 100 , so that a plurality of battery modules 200 can be simultaneously arranged in the accommodating grooves 140 .

Referring to FIGS. 3 and 4, in some embodiments, optionally, the longitudinal beam plug 134 is partially accommodated in the second flow channel 131; the second opening 132 is provided on the longitudinal beam plug 134, and the longitudinal beam plug A third flow channel 1341 that communicates with the second flow channel 131 and the second opening 132 is also provided in the 134 .

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

Such a design enables the second opening 132 on the longitudinal beam 130 to be disposed on the longitudinal beam plug 134, and the second opening 132 and the second flow channel 131 are communicated through the third flow channel 1341 in the longitudinal beam plug 134 to ensure that the The normal use of the second flow channel 131 is ensured, and the second opening 132 does not need to be opened on the longitudinal beam body 133 , which reduces the processing difficulty of the longitudinal beam body 133 and improves the structural strength of the longitudinal beam body 133 .

Please continue to refer to FIGS. 1 to 2 , in some embodiments, optionally, the side of the longitudinal beam plug 134 facing the corresponding side plate 120 is provided with a first connection hole 1342 , and the side plate 120 is provided with a second connection hole 1342 . The connection hole 121 and the longitudinal beam body 133 are connected to the side plate 120 by means of the first connection hole 1342 and the second connection hole 121 .

It can be understood that the first connection hole 1342 and the second connection hole 121 are used to assist in realizing the connection between the longitudinal beam plug 134 and the side plate 120, and the first connection hole 1342 and the second connection hole 121 can be round holes, square holes , threaded holes, etc., their shape, diameter, number, etc. are not limited.

Such a design realizes the connection between the longitudinal beam body 133 and the side plate 120 by means of the first connection hole 1342 and the second connection hole 121, so that the installation and connection between the longitudinal beam body 133 and the side plate 120 are simpler and more convenient. The connection structure also does not need to occupy additional space, which improves 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 the joint 150 is provided with a through hole 151 therethrough; The first opening 112 and the second opening 132 .

The joint 150 can be used to connect two objects. In this embodiment, both ends of the joint 150 are sealedly connected to the first opening 112 and the second opening 132 respectively, so as to realize the communication between the first opening 112 and the second opening 132 . The joint 150 is sealingly 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 avoid leakage at their connection.

The first opening 112 and the second opening 132 are sealedly connected by arranging the joint 150 , the structure is simple, the installation of the joint 150 is convenient, and the conduction effect of the first opening 112 and the second opening 132 is good.

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

The gasket 160 is a sealing spare part used for parts such as machinery, equipment, pipes, etc., and is used for sealing connection between pipes, sealing connection between parts of machinery and equipment, and the like. The gasket 160 is made of metal or non-metal plate material through cutting, punching or cutting and other processes, and can be divided into 160 pieces of metal gaskets and 160 pieces of non-metallic gaskets according to the material. There are copper gaskets, stainless steel gaskets, iron gaskets, aluminum gaskets and so on. Non-metallic asbestos gaskets, non-asbestos gaskets, paper gaskets, rubber gaskets, etc.

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

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

The bead 135 is a strip-shaped structure extending from the longitudinal beam 130 , which is located on the side of the longitudinal beam 130 away from the bottom plate 110 . Since the longitudinal beams 130 are arranged on the bottom plate 110 and the beading strips 135 are arranged in parallel with the bottom plate 110 , the beading strips 135 , the main structure of the longitudinal beams 130 and the bottom plate 110 are enclosed to form a space for installing the battery module 200 . The installation space can play a role of fixing and limiting the battery module 200 . The shape, size and protruding degree of the rib 135 are not limited.

Such a design enables the rib 135 on the longitudinal beam 130 to press the battery module 200 into the accommodating groove 140 , thereby preventing the battery module 200 from being separated from the battery box 100 , and improving the connection between the battery box 100 and the battery module 200 . connection stability. At the same time, it can also increase the tightness of the connection between the battery module 200 and the longitudinal beam 130 , so that the second flow channel 131 in the longitudinal beam 130 can maintain stable contact and cooling with the battery module 200 , which further improves the safety of the battery module 200 . cooling efficiency.

In some embodiments, the stringer 130 optionally includes a plurality of stringers 130 that are parallel and spaced apart from each other.

The number of the longitudinal beams 130 can be reasonably installed and set according to the size of the accommodating groove 140 in the battery box 100 . Specifically, in the embodiment shown in FIG. 1 , the number of the longitudinal beams 130 is three, and the three longitudinal beams 130 are arranged along its The directions perpendicular to the longitudinal extension direction of itself are parallel to each other and arranged at intervals. Of course, in other embodiments, the number of the longitudinal beams 130 may also be four, five, etc., which will not be repeated here.

By arranging a plurality of longitudinal beams 130 parallel to each other and spaced apart, the accommodating grooves 140 of the battery box 100 can be separated, so that a plurality of battery modules 200 can be placed in the accommodating grooves 140 at the same time. The longitudinal beam 130 can sandwich the battery module 200 between the two, which can play a certain fastening role for the battery module 200 and improve the connection stability between the battery box 100 and the battery module 200 .

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, please refer 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 above-mentioned embodiments, and the battery module 200 is accommodated in the accommodating groove within 140.

The bottom plate 110 and the side plate 120 of the battery box 100 surround a receiving groove 140 for accommodating the battery module 200 . The bottom plate 110 is provided with a first flow channel 111 , and the inner surface of the bottom plate 110 is provided with a first flow channel 111 communicating with the first flow channel 111 . the first opening 112. The longitudinal beam 130 is disposed on the inner surface of the bottom plate 110 and is located in the accommodating groove 140 . A second flow channel 131 is provided inside the longitudinal beam 130 , and the side of the longitudinal beam 130 facing the bottom plate 110 is provided with a second flow channel 131 that communicates with and communicates with the second channel 131 . The first opening 112 corresponds to the communicating second opening 132 .

The battery module 200 includes a plurality of battery cells connected in series or in parallel or in a mixed connection. 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 battery The plurality of battery cells in the module 200 are arranged side by side along the longitudinal extension direction of the longitudinal beam 130 . In this way, when the heat transfer fluid flows in the cooling channel, it flows through the bottom of each battery cell in the battery module 200 respectively. And the side, the heat emitted by the battery module 200 is absorbed and taken away, and then flows to the bottom and sides of the battery module 200 after cooling and cooling, forming a cycle to cool the battery module 200. Cooling effect.

According to yet another aspect of the present application, an embodiment of the present application further provides an electrical device, including the battery 10 in the above embodiment.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (11)

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.

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