CN116014323A

CN116014323A - Box, battery and power consumption device

Info

Publication number: CN116014323A
Application number: CN202111234056.XA
Authority: CN
Inventors: 朱德财; 孙硕; 吴自强
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2023-04-25

Abstract

The application provides a box, battery and power consumption device, belongs to battery technical field. Wherein, the box includes case body and two apron. The inside of case body is formed with two accommodation cavities of arranging along predetermineeing the direction, and accommodation cavities are used for holding the battery monomer, in predetermineeing the direction, two accommodation cavities form the opening in the both sides of case body respectively. The two cover plates are respectively used for covering the openings of the two accommodating cavities. The box body adopting the structure is convenient for maintain and replace the battery monomer in the two accommodating cavities at the later stage, and the openings of the two accommodating cavities are respectively arranged at the two sides of the box body in the preset direction, so that the battery monomer can be respectively assembled into the two accommodating cavities through the openings at the two sides of the box body, the structure of the box body can not be limited by the assembly of the battery monomer, the structural strength of the box body is improved, the extrusion resistance and the shearing resistance of the box body are improved, and the potential safety hazard of the battery in the use process can be effectively reduced.

Description

Box, battery and power consumption device

Technical Field

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

Background

In recent years, new energy automobiles have been developed dramatically, and in the field of electric automobiles, a power battery plays an important role as a power source of the electric automobile. In particular to a new energy automobile taking a lithium battery as power, wherein the battery consists of a box body and a plurality of battery monomers accommodated in the box body, and the battery has higher requirements on the aspects of cost and safety as a core part of the new energy automobile. At present, in order to improve the endurance of a new energy automobile, a battery is generally set as a laminated power battery in the prior art so as to increase the accommodation amount of a battery monomer, however, the conventional laminated power battery is inconvenient to assemble and disassemble so as to lead to lower production assembly efficiency and later maintenance efficiency of the battery, and the structural strength of the battery is poor so as to lead to insufficient shearing resistance of the battery in an impact working condition, thereby leading to larger potential safety hazards in the use process of the battery.

Disclosure of Invention

The embodiment of the application provides a box, battery and power consumption device, can effectively reduce the potential safety hazard of battery in the use.

In a first aspect, embodiments of the present application provide a case, including a case body and two cover plates; two accommodating cavities which are arranged along a preset direction are formed in the box body, the accommodating cavities are used for accommodating battery monomers, and openings are formed on two sides of the box body respectively in the preset direction; the two cover plates are respectively used for covering the openings of the two accommodating cavities.

In the above technical scheme, through setting up two accommodation cavities of arranging along predetermineeing the direction in the case body, and the opening of two accommodation cavities is located the case body respectively in predetermineeing the ascending both sides of direction to after making two apron lid and closing corresponding opening, form the battery design of range upon range of formula. The box body adopting the structure is convenient for assemble the battery monomer in two accommodation cavities on one hand, and is convenient for maintain and change the battery monomer in two accommodation cavities at the later stage, thereby be favorable to improving the production assembly efficiency and the later maintenance efficiency of battery, on the other hand, through setting up the opening of two accommodation cavities in the both sides of box body in preset direction respectively, so that the battery monomer can assemble to two accommodation cavities respectively through the opening of box body both sides, the structure of box body can not receive the restriction of battery monomer assembly, need not to set up the box body as the two-layer detachable structure in preset direction, thereby be favorable to improving the overall structural strength of box body self, with the anti extrusion ability of promotion box body and the anti shearing ability under the impact condition, and then can effectively reduce the potential safety hazard of battery in the use.

In some embodiments, the case body includes a connector and two first frames; the two first frame bodies are respectively connected to two sides of the connecting piece in the preset direction, each first frame body and the connecting piece jointly form one accommodating cavity, and one side, far away from the connecting piece, of the first frame body in the preset direction forms the opening.

In the above technical scheme, through connecting two first frameworks respectively in the connecting piece in the ascending both sides of predetermineeing to make connecting piece and two first frameworks form two respectively and hold the chamber, the case body of adopting this kind of structure is convenient for produce and is made, need not to set up the case body as integrated into one piece's structure, thereby is favorable to reducing the manufacturing degree of difficulty and the manufacturing cost of case body.

In some embodiments, the connector includes a second frame and a separator; the two ends of the second frame body in the preset direction are respectively connected with the two first frame bodies; the separator is fixed on the inner side of the second frame body and is used for separating the two accommodating cavities.

In the above technical scheme, the connecting piece includes two parts of second framework and separator, through connecting the separator in the inboard of second framework to make the separator can separate two accommodation chamber. In addition, connect two first frameworks respectively in the both ends of second framework in the direction of predetermineeing to realize that two first frameworks connect in the separator in the both sides of predetermineeing the direction, adopt the connecting piece of this kind of structure to make the seam of first framework and second framework exist the distance with the separator in the direction of predetermineeing, so that the seam of first framework and second framework can effectively avoid the turning between second framework and the separator, thereby be convenient for connect first framework in the second framework, and then be favorable to reducing the connection degree of difficulty between first framework and the second framework, and be favorable to improving the joint strength between first framework and the second framework.

In some embodiments, the second frame is welded to the first frame.

In the technical scheme, the first frame body and the second frame body are connected in a welding mode, so that the connection strength between the first frame body and the second frame body is improved, the structural strength of the box body can be improved, and the impact resistance and the shearing resistance of the box body under an impact environment are improved.

In some embodiments, an inner wall of the second frame body protrudes toward the separator to form a connection portion connected to the separator.

In the above technical scheme, the connecting part is convexly arranged on the inner wall of the second frame body facing the separator, so that the outer peripheral wall of the separator can be connected with the second frame body through the connecting part, the joint of the separator and the connecting part is enabled to be at a distance from the second frame body in the extending direction of the separator by adopting the connecting piece of the structure, so that the joint of the separator and the connecting part can effectively avoid the corner between the connecting part and the second frame body, the separator is conveniently connected onto the second frame body, the connection difficulty between the separator and the second frame body is reduced, and the connection strength between the separator and the second frame body is improved.

In some embodiments, the separator has a thermal management region for regulating the temperature of the battery cells.

In the technical scheme, the separator is used for adjusting the thermal management area of the battery monomer so as to reduce the temperature of the battery monomer in the box body, thereby effectively relieving the potential safety hazard brought by the battery with the box body when the temperature of the battery monomer rises. In addition, through setting up the thermal management area on the separator to make two battery units that hold the intracavity can share this thermal management area, thereby be favorable to reducing the manufacturing cost of box, and be favorable to retrenching the structure of box, reduce the manufacturing degree of difficulty.

In some embodiments, a heat conducting member is disposed in each of the two accommodation chambers; the heat conducting piece is used for being arranged between the battery cell and the separator, and the heat conducting piece covers at least part of the thermal management area.

In the above technical scheme, through setting up the heat conduction spare between battery monomer and separator, and the heat conduction spare covers the at least part of thermal management region to make the heat conduction spare can be with the heat transfer of battery monomer to the thermal management region, thereby can effectively improve the heat conduction efficiency between battery monomer and the thermal management region, and then be convenient for the thermal management region adjust battery monomer's temperature, and be favorable to improving the thermal management region and to the regulation efficiency of battery monomer's temperature.

In some embodiments, a first weight-reducing cavity is formed in at least one of the two first frames; and/or a second weight-reducing cavity is formed in the connecting piece.

In the above technical scheme, the first weight-reducing cavity is formed in the first frame or the second weight-reducing cavity is formed in the connecting piece, so that the weight of the box body can be reduced on the premise of ensuring the overall structural strength of the box body, and the weight of a battery with the box body can be reduced, so that the battery can be transported and used conveniently.

In some embodiments, the thickness of the cover plate at the bottom of the tank body is greater than the thickness of the cover plate at the top of the tank body.

In the above technical scheme, the thickness of the cover plate positioned at the bottom of the box body in the two cover plates is set to be larger than that of the other cover plate so as to improve the structural strength of the cover plate positioned at the bottom of the box body, thereby being beneficial to improving the bearing capacity of the cover plate positioned at the bottom of the box body to the battery monomer in the accommodating cavity and reducing the risk that the cover plate positioned at the bottom of the box body is deformed or damaged in the later use process.

In some embodiments, one side of the cover plate located at the bottom of the case body facing the accommodating chamber has an abutment plane against which the battery cell abuts.

In the technical scheme, the cover plates located at the bottom of the box body in the two cover plates are arranged to be flat towards one side of the accommodating cavity, so that the cover plates located at the bottom of the box body can play a better supporting role and a better protecting role on the battery cells in the accommodating cavity, and the phenomenon that the battery cells and the cover plates are damaged in a collision manner in the later use process is reduced.

In a second aspect, an embodiment of the present application further provides a battery, including a battery unit and the case described above; the box body is used for accommodating the battery cells.

In some embodiments, the battery cell has opposite first and second ends in the predetermined direction; the first end is used for outputting current; the second end is configured to face a cavity bottom wall of the receiving cavity.

In the above technical scheme, through the second end of battery monomer towards the chamber diapire setting of holding the chamber of case body, that is to say, hold the chamber diapire setting of chamber with the battery monomer in the chamber all dorsad holding the chamber, the battery of adopting this kind of structure is convenient for assemble the battery monomer in two holding the chamber on the one hand, on the other hand makes the battery monomer in two holding the chamber can share a thermal management area, is favorable to saving the manufacturing cost of battery.

In a third aspect, an embodiment of the present application further provides an electrical device, including the battery described above, where the battery is configured to provide electrical energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of a battery provided in some embodiments of the present application;

FIG. 3 is an exploded view of a battery according to some embodiments of the present application;

FIG. 4 is a cross-sectional view of a battery provided in some embodiments of the present application;

FIG. 5 is a cross-sectional view of a tank provided in some embodiments of the present application;

fig. 6 is a partial enlarged view of a portion of the case shown in fig. 5.

Icon: 1000-vehicle; 100-cell; 10-a box body; 11-a box body; 111-a receiving cavity; 112-a first frame; 1121-a first weight-reduction chamber; 113-a connector; 1131-a second housing; 1131 a-linkages; 1132-separator; 1132 a-cooling flow passage; 1133-a second weight-reduction chamber; 114-a heat conducting member; 12-cover plate; 121-an abutment plane; 20-battery cells; 200-a controller; 300-motor; x-preset direction.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and in the interest of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.

The term "plurality" as used herein refers to more than two (including two).

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited by the embodiment of the present application. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft pack battery cell are not limited thereto.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell includes a case, an electrode assembly, and an electrolyte, and the case is used to accommodate the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together.

The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The lithium ion battery has the outstanding advantages of high energy density, small environmental pollution, high power density, long service life, wide application range, small self-discharge coefficient and the like, is one of the most widely applied batteries in the world nowadays, and is also an important component of new energy development. Along with the continuous development of lithium ion battery technology, higher requirements are also put forward on the safety performance of lithium ion batteries, wherein the box body has an important influence on the safety performance of the batteries, and the structural strength of the box body determines the safety performance of the batteries in the use process.

The inventors found that, currently, in order to improve the cruising ability of a new energy vehicle, a battery is generally provided as a laminated power battery to increase the capacity of a battery cell. However, in the stacked power cell, the impact resistance and crush resistance of the case are extremely challenging. In the prior art, in order to realize the range upon range of design of battery, set up the battery monomer in last box and lower box respectively earlier in, will go up the box again and weight in the opening part of lower box, last box and lower box pass through bolted connection, thereby satisfy the range upon range of design of battery, but, the box of this kind of structure is comparatively complicated with dismantling on the one hand, be inconvenient for production assembly and later stage dismantlement, thereby be unfavorable for improving production efficiency and later maintenance efficiency, on the other hand in order to reserve the installation space of bolt, need set up at last box and dodge the space, so that there is the weak point in the last box, thereby it is impaired to lead to the self intensity of last box to make the anti-extrusion ability of battery reduce, and because last box and lower box pass through bolted connection, the installation space of bolt is restricted, can't select great bolt, thereby cause the battery under the shearing resistance of impact condition, and then make the battery cause risk such as explosion easily in the collision in the course, so as to lead to the potential safety hazard that the battery exists in the use.

Based on the above consideration, in order to solve the problem that the battery has a large potential safety hazard in the use process, the inventor has conducted intensive studies and designed a box body, the box body is provided with a box body and two cover plates, two accommodating cavities arranged along a preset direction are arranged in the box body, openings of the two accommodating cavities are respectively arranged on two sides of the box body in the preset direction, and the two cover plates are respectively covered on the openings of the two accommodating cavities.

The box body adopting the structure is convenient for assemble the battery monomer into the accommodating cavity in the production process on one hand by respectively covering the two cover plates at the openings at the two sides of the box body, thereby being beneficial to improving the production efficiency of the battery, and on the other hand, when the battery monomer in the accommodating cavity is required to be maintained or replaced in the later stage, the corresponding cover plates are only required to be opened, thereby being convenient for disassembling and maintaining the battery in the later stage, having simple operation procedure and being beneficial to improving the efficiency of the later stage maintenance.

In addition, in the use, through setting up the opening in two accommodation cavities in the both sides of case body in the orientation of predetermineeing, so that the battery monomer can be assembled to two accommodation cavities through the opening in case body both sides, make the structure of case body can not receive the restriction of battery monomer assembly, thereby need not to set up the case body as two-layer detachable structure from top to bottom, that is to say, the bolted connection between the two-layer about having cancelled the case body, also need not to set up on the case body and dodge the space, thereby be favorable to improving the overall structural strength of case body, with the anti extrusion ability of promotion range upon range of battery and the anti shearing ability under the condition of impact between two-layer about the range upon range of battery, and then be favorable to reducing the potential safety hazard that the battery exists in the use.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the batteries. The power supply system with the power utilization device formed by the box body, the battery and the like disclosed by the application can be used, so that potential safety hazards of the battery in the use process can be relieved.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization 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 car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a battery 100 according to some embodiments of the present application, and fig. 3 is an exploded structural diagram of the battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, the case 10 being for accommodating the battery cell 20.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, and further referring to fig. 4 and 5, fig. 4 is a cross-sectional view of a battery 100 according to some embodiments of the present application, and fig. 5 is a cross-sectional view of a case 10 according to some embodiments of the present application. The application provides a box 10, the box 10 includes a box body 11 and two cover plates 12. The inside of the case body 11 is formed with two accommodation chambers 111 arranged in a preset direction X, the accommodation chambers 111 being for accommodating the battery cells 20, and in the preset direction X, the two accommodation chambers 111 are formed with openings at both sides of the case body 11, respectively. The two cover plates 12 are respectively used for covering the openings of the two accommodating cavities 111.

Wherein, the preset direction X is the thickness direction of the case body 11, two accommodating cavities 111 arranged along the preset direction X are formed inside the case body 11, that is, two accommodating cavities 111 for accommodating the battery cells 20 are formed in the case body 11, and the two accommodating cavities 111 are arranged at intervals in the preset direction X.

Optionally, the cover plate 12 is detachably connected to one side of the case body 11 in the preset direction X to cover the opening of the corresponding accommodating cavity 111, so that the cover plate 12 can be quickly detached and installed, and the battery cells 20 disposed in the accommodating cavity 111 can be replaced or maintained in a later use. Illustratively, the cover 12 is screwed to the case body 11 by bolts, and in other embodiments, the cover 12 may be detachably connected to the case body 11 by a clamping or fastening manner.

By arranging two accommodating cavities 111 arranged along the preset direction X in the case body 11, and openings of the two accommodating cavities 111 are respectively located at two sides of the case body 11 in the preset direction X, the two cover plates 12 are covered with the corresponding openings, and then the laminated battery 100 is designed. The box 10 adopting such a structure is convenient for assemble the battery monomer 20 in two accommodation cavities 111 on the one hand, and is convenient for maintain and change the battery monomer 20 in two accommodation cavities 111 in the later stage, thereby be favorable to improving the production assembly efficiency and the later maintenance efficiency of battery 100, on the other hand, through set up the opening of two accommodation cavities 111 respectively in the both sides of box body 11 on predetermineeing direction X, so that the battery monomer 20 can assemble respectively to two accommodation cavities 111 through the opening of box body 11 both sides, the structure of box body 11 can not receive the restriction of battery monomer 20 assembly, need not to set up the box body 11 as the structure of two-layer detachable in predetermineeing direction X, thereby be favorable to improving the overall structure intensity of box body 11 self, in order to promote the anti extrusion ability of box body 10 and the anti shearing ability under the condition of impact, and then can effectively reduce the potential safety hazard of battery 100 in the use.

Referring to fig. 5, according to some embodiments of the present application, the case body 11 includes a connection member 113 and two first frames 112. The two first frames 112 are respectively connected to two sides of the connecting piece 113 in the preset direction X, each first frame 112 and the connecting piece 113 together form a containing cavity 111, and one side of the first frame 112 away from the connecting piece 113 in the preset direction X forms an opening.

Wherein, each cover 12 is correspondingly connected to one end of the first frame 112 away from the connecting piece 113 in the preset direction X, so that the cover 12 covers the corresponding opening. The first frame 112 may be an integral structure or a split structure. When the first frame 112 is of an integral structure, the first frame 112 forms an annular structure extending in the circumferential direction of the connecting member 113 by an integral molding process; when the first frame 112 is of a split structure, the first frame 112 is welded end to end by a plurality of plate-like structures to form an annular structure extending in the circumferential direction of the connecting member 113.

It should be noted that the structure of the case body 11 may be various, the case body 11 may be a split structure, as shown in fig. 5, the case body 11 may be formed by connecting a connecting member 113 and two first frames 112, or the case body 11 may be an integral structure, that is, the case body 11 is integrally formed by a casting process or the like, and two accommodating chambers 111 arranged along the preset direction X are formed in the case body 11.

The two first frames 112 are respectively connected to the two sides of the connecting piece 113 in the preset direction X, so that the connecting piece 113 and the two first frames 112 respectively form the two accommodating cavities 111, and the box body 11 adopting the structure is convenient to produce and manufacture, and the box body 11 is not required to be arranged into an integrally formed structure, thereby being beneficial to reducing the manufacturing difficulty and the manufacturing cost of the box body 11.

According to some embodiments of the present application, please continue to refer to fig. 5, the connecting member 113 includes a second frame 1131 and a partition 1132, and two ends of the second frame 1131 in the predetermined direction X are respectively connected to the two first frames 112. The partition 1132 is fixed to the inner side of the second frame 1131, and the partition 1132 is used to partition the two accommodating chambers 111.

The connecting member 113 includes two parts of a second frame 1131 and a partition 1132, and the partition 1132 is connected to the inner side of the second frame 1131, so that the partition 1132 can separate the two accommodating chambers 111. The second frame 1131 is a ring structure extending along the circumferential direction of the separator 1132, and the height direction of the second frame 1131 extends along the second direction, so that the two first frames 112 can be connected to both ends of the second frame 1131 in the preset direction X.

The second housing 1131 may have various structures, such as a single-piece structure or a split-piece structure. When the first frame body is of an integral structure, the second frame body 1131 forms an annular structure extending along the circumferential direction of the separator 1132 through an integral molding process; when the second frame 1131 is of a split structure, the second frame 1131 is welded sequentially from end to end through a plurality of plate structures, so as to form an annular structure extending along the circumferential direction of the separator 1132.

Alternatively, the separator 1132 is a plate structure, and the separator 1132 may be welded with a plurality of plate structures, or may be an integral structure.

The case body 11 adopting the structure connects the two first frames 112 to the two ends of the second frame 1131 in the preset direction X respectively, so that the two first frames 112 are connected to the two sides of the separator 1132 in the preset direction X, and the connecting piece 113 adopting the structure enables the seam of the first frame 112 and the second frame 1131 to have a distance from the separator 1132 in the preset direction X, so that the seam of the first frame 112 and the second frame 1131 can effectively avoid the corner between the second frame 1131 and the separator 1132, thereby facilitating the connection of the first frame 112 to the second frame 1131, further facilitating the reduction of the connection difficulty between the first frame 112 and the second frame 1131, and facilitating the improvement of the connection strength between the first frame 112 and the second frame 1131.

According to some embodiments of the present application, the second housing 1131 is welded to the first housing 112.

The connection between the first frame 112 and the second frame 1131 is realized by adopting a welding mode, so that the connection strength between the first frame 112 and the second frame 1131 is improved, the structural strength of the box body 11 can be improved, and the impact resistance and the shearing resistance of the box 10 in an impact environment can be enhanced.

Referring to fig. 5, and further referring to fig. 6, fig. 6 is a partial enlarged view of a portion a of the case 10 shown in fig. 5 according to some embodiments of the present application. The inner wall of the second housing 1131 protrudes toward the separator 1132 to form a connection part 1131a, and the connection part 1131a is connected to the separator 1132.

The inner wall of the second housing 1131 protrudes toward the separator 1132 to form a connection part 1131a, that is, the inner wall of the second housing 1131 protrudes toward the separator 1132 to form a connection part 1131a having a ring-shaped structure extending in the circumferential direction of the separator 1132. The connection portion 1131a is formed integrally with the second housing 1131, that is, the connection portion 1131a is formed integrally with the second housing 1131.

Illustratively, the separator 1132 is welded to the connection 1131a, and a weld is formed between an outer circumferential wall of the separator 1132 and an inner circumferential wall of the connection 1131a, such that the separator 1132 is welded to the connection 1131a.

The connecting part 1131a is convexly arranged on the inner wall of the second frame body 1131 facing the separator 1132, so that the outer peripheral wall of the separator 1132 can be connected with the second frame body 1131 through the connecting part 1131a, a joint of the separator 1132 and the connecting part 1131a is separated from the second frame body 1131 in the extending direction of the separator 1132 by adopting the connecting piece 113 with the structure, and the joint of the separator 1132 and the connecting part 1131a can effectively avoid the corner between the connecting part 1131a and the second frame body 1131, thereby being convenient for connecting the separator 1132 on the second frame body 1131, further being beneficial to reducing the connection difficulty between the separator 1132 and the second frame body 1131 and improving the connection strength between the separator 1132 and the second frame body 1131.

With continued reference to fig. 5 and 6, the separator 1132 has a thermal management region for regulating the temperature of the battery cells 20, according to some embodiments of the present application.

Wherein the separator 1132 has a thermal management region, i.e., the separator 1132 has a portion capable of adjusting the temperature of the battery cells 20 located within the receiving chamber 111.

Optionally, a cooling channel 1132a for cooling medium to flow is formed in the separator 1132, and a position corresponding to the cooling channel 1132a is a thermal management area of the separator 1132, so that the cooling medium can take away heat of the battery cell 20 when flowing through the cooling channel 1132a in the separator 1132, thereby realizing a function of adjusting the temperature of the battery cell 20. Illustratively, the cooling medium is cooling water, and the cooling flow channel 1132a is used for flowing cooling water, that is, the separator 1132 is a liquid cooling plate.

The separator 1132 is provided to adjust a thermal management area of the battery cell 20 to reduce the temperature of the battery cell 20 in the case 10, so that the potential safety hazard of the battery 100 having such case 10 when the temperature of the battery cell 20 increases can be effectively alleviated. In addition, the thermal management area is provided on the separator 1132, so that the battery cells 20 in the two accommodating chambers 111 can share the thermal management area, thereby being beneficial to reducing the manufacturing cost of the case 10, simplifying the structure of the case 10, and reducing the manufacturing difficulty.

With continued reference to fig. 5 and 6, according to some embodiments of the present application, a thermally conductive member 114 is disposed within each of the two receiving chambers 111. The heat conductive member 114 is disposed between the battery cell 20 and the separator 1132, and the heat conductive member 114 covers at least a portion of the thermal management area.

The heat conductive member 114 is disposed between the battery cell 20 and the separator 1132 to connect the battery cell 20 and the separator 1132 through the heat conductive member 114, and illustratively, in fig. 5, the heat conductive member 114 completely covers the thermal management area of the separator 1132 to improve the heat conductive effect. Of course, in other embodiments, the heat conducting member 114 may also be a thermal management area partially covered on the separator 1132.

The heat conductive member 114 is, for example, a heat conductive adhesive disposed on one side of the separator 1132 in the preset direction X, and the heat conductive adhesive is used to bond the battery cell 20 and the separator 1132, so as to transfer heat of the battery cell 20 to a thermal management area of the separator 1132. In other embodiments, the heat conducting member 114 may be a heat conducting pad or the like. The specific structure of the heat conductive adhesive and the heat conductive pad can be referred to in the related art, and will not be described herein.

Through set up heat conduction spare 114 between battery monomer 20 and separator 1132, and heat conduction spare 114 covers the at least part of thermal management region to make heat conduction spare 114 can be with the heat transfer of battery monomer 20 to the thermal management region, thereby can effectively improve the heat conduction efficiency between battery monomer 20 and the thermal management region, and then the thermal management region of being convenient for adjusts the temperature of battery monomer 20, and is favorable to improving the thermal management region and to the regulation efficiency of battery monomer 20's temperature.

Referring to fig. 5 and 6, at least one first frame 112 of the two first frames 112 is provided with a first weight-reducing cavity 1121. And/or, a second weight-reducing cavity 1133 is provided within the connector 113.

Illustratively, a first weight-reducing cavity 1121 is formed in the first frame 112 above the connecting member 113 in the two first frames 112, and a second weight-reducing cavity 1133 is formed in the second frame 1131 of the connecting member 113. The first and second weight-reducing

chambers

1121, 1133 may be one, two, three, four, etc. In fig. 5, the number of first weight-reducing chambers 1121 is three, and the number of second weight-reducing chambers 1133 is two. In other embodiments, the two first frames 112 may have the first weight-reducing cavities 1121 formed therein, and the connecting member 113 has no second weight-reducing cavity 1133 formed therein.

It should be noted that, the first weight-reducing cavity 1121 and the second weight-reducing cavity 1133 may be configured according to actual requirements and structural strength of the case 10.

By providing the first weight-reducing cavity 1121 in the first frame 112 or providing the second weight-reducing cavity 1133 in the connecting member 113, the weight of the case 10 can be reduced on the premise of ensuring the overall structural strength of the case 10, and the weight of the battery 100 having such a case 10 can be reduced, so as to facilitate transportation and use.

Referring to fig. 4 and 5, according to some embodiments of the present application, the thickness of the cover plate 12 at the bottom of the tank body 11 is greater than the thickness of the cover plate 12 at the top of the tank body 11 of the two cover plates 12.

In the practical use process, the battery cell 20 in the accommodating cavity 111 at the lower side of the case body 11 will apply a certain load force to the cover plate 12 at the bottom of the case body 11, so increasing the thickness of the cover plate 12 at the bottom of the case body 11 can improve the bearing capacity of the battery cell 20.

The thickness of the cover plate 12 positioned at the bottom of the box body 11 in the two cover plates 12 is set to be larger than that of the other cover plate 12, so that the structural strength of the cover plate 12 positioned at the bottom of the box body 11 is improved, the bearing capacity of the cover plate 12 positioned at the bottom of the box body 11 to the battery cells 20 in the containing cavity 111 is improved, and the risk that the cover plate 12 positioned at the bottom of the box body 11 is deformed or damaged in the later use process is reduced.

According to some embodiments of the present application, referring to fig. 5, one side of the cover plates 12 located at the bottom of the case body 11 of the two cover plates 12 facing the accommodating cavity 111 has an abutment plane 121 against which the power supply unit 20 abuts.

Wherein, the side of the cover plate 12 at the bottom of the box body 11 facing the accommodating cavity 111 of the two cover plates 12 is provided with an abutting plane 121 for the power supply unit 20 to abut, i.e. the side of the cover plate 12 at the bottom of the box body 11 facing the accommodating cavity 111 is provided with a plane for the power supply unit 20 to abut.

The cover plate 12 at the bottom of the box body 11 of the two cover plates 12 is arranged to be planar towards one side of the accommodating cavity 111, so that the cover plate 12 at the bottom of the box body 11 can have a good supporting effect and a good protecting effect on the battery cells 20 of the accommodating cavity 111, and the phenomenon that the battery cells 20 and the cover plate 12 are collided and damaged in the later use process is reduced.

According to some embodiments of the present application, there is also provided a battery 100 including a battery cell 20 and a case 10 of any of the above aspects. The case 10 is for accommodating the battery cells 20.

According to some embodiments of the present application, referring to fig. 4, the battery cell 20 has opposite first and second ends in a predetermined direction X, the first end being for outputting current, and the second end being for being disposed facing the cavity bottom wall of the receiving cavity 111.

The second end of the battery cell 20 is disposed toward the bottom wall of the accommodating cavity 111, that is, the second end of the battery cell 20 is disposed toward the separator 1132, that is, the battery cell 20 in the accommodating cavity 111 located at the lower side of the case body 11 is disposed upside down, and the direction of disposing the battery cell 20 in the accommodating cavity 111 located at the upper side of the case body 11 is opposite. When the battery cell 20 is installed in the case 10, the case body 11 is turned over so that the accommodating cavity 111 located at the lower side of the case body 11 faces upward, then the battery cell 20 is assembled into the accommodating cavity 111, the corresponding cover plate 12 is covered, and then the case body 11 is turned over, so that the battery cell 20 can be installed in the other accommodating cavity 111, and finally the corresponding cover plate 12 is covered. The assembly is simple and the operation is convenient.

The battery 100 adopting such a structure facilitates assembling the battery cells 20 in the two accommodating chambers 111 on the one hand and enables the battery cells 20 in the two accommodating chambers 111 to share one thermal management area on the other hand by arranging the second ends of the battery cells 20 facing the chamber bottom wall of the accommodating chamber 111 of the case body 11, that is, arranging the battery cells 20 in the two accommodating chambers 111 facing away from the chamber bottom wall of the accommodating chamber 111.

According to some embodiments of the present application, there is also provided an electrical device comprising the battery 100 of any of the above aspects, and the battery 100 is used to provide electrical energy to the electrical device.

The powered device may be any of the devices or systems described above that employ battery 100.

According to some embodiments of the present application, referring to fig. 3-5, the present application provides a case 10, the case 10 includes a case body 11 and two cover plates 12, two accommodating chambers 111 arranged along a preset direction X are provided inside the case body 11, the case body 11 includes a connecting piece 113 and two first frame bodies 112, the connecting piece 113 includes a partition body 1132 and a second frame body 1131 extending along a circumferential direction of the partition body 1132, the two first frame bodies 112 are respectively welded to two ends of the second frame body 1131 in the preset direction X, a connecting portion 1131a extending along the circumferential direction of the partition body 1132 is provided protruding from an inner circumferential wall of the second frame body 1131, and an inner circumferential wall of the connecting portion 1131a is welded to an outer circumferential wall of the partition body 1132, so that the two first frame bodies 112 and the connecting piece 113 respectively form two accommodating chambers 111 for accommodating battery cells 20, and the two cover plates 12 respectively cover openings on one side of the two first frame bodies 112 away from the connecting piece 113 in the preset direction X. The cooling flow channel 1132a for adjusting the temperature of the battery cell 20 is provided in the separator 1132, and a heat-conducting adhesive for conducting heat is provided between the separator 1132 and the battery cell 20.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A tank, comprising:

the battery box comprises a box body, wherein two accommodating cavities are formed in the box body and are arranged along a preset direction, the accommodating cavities are used for accommodating battery monomers, and openings are formed in the two sides of the box body respectively in the preset direction; and

and the two cover plates are respectively used for covering the openings of the two accommodating cavities.

2. The case according to claim 1, wherein the case body includes a connecting member and two first frames;

the two first frame bodies are respectively connected to two sides of the connecting piece in the preset direction, each first frame body and the connecting piece jointly form one accommodating cavity, and one side, far away from the connecting piece, of the first frame body in the preset direction forms the opening.

3. The case according to claim 2, wherein the connection member includes a second frame and a partition;

the two ends of the second frame body in the preset direction are respectively connected with the two first frame bodies;

the separator is fixed on the inner side of the second frame body and is used for separating the two accommodating cavities.

4. A cabinet according to claim 3, wherein the second frame is welded to the first frame.

5. A case according to claim 3, wherein an inner wall of the second frame body is formed to protrude toward the partition body to form a connection portion, and the connection portion is connected to the partition body.

6. The case of claim 3, wherein the separator has a thermal management area for regulating the temperature of the battery cells.

7. The cabinet according to claim 6, wherein heat conductive members are provided in both of the accommodation chambers;

the heat conducting piece is used for being arranged between the battery cell and the separator, and the heat conducting piece covers at least part of the thermal management area.

8. The case according to claim 2, wherein a first weight-reduction cavity is provided in at least one of the two first frames; and/or

And a second weight reducing cavity is formed in the connecting piece.

9. The case according to claim 1, wherein the thickness of the cover plate located at the bottom of the case body among the two cover plates is greater than the thickness of the cover plate located at the top of the case body.

10. The case according to claim 1, wherein one side of the cover plate located at the bottom of the case body among the two cover plates facing the accommodation chamber has an abutment plane against which the battery cell abuts.

11. A battery, comprising:

a battery cell; and

the case according to any one of claims 1 to 10, for accommodating the battery cell.

12. The battery of claim 11, wherein the battery cell has opposite first and second ends in the predetermined direction;

the first end is used for outputting current;

the second end is configured to face a cavity bottom wall of the receiving cavity.

13. An electrical device comprising a battery according to claim 11 or 12 for providing electrical energy.