CN221262631U

CN221262631U - Battery and electric equipment

Info

Publication number: CN221262631U
Application number: CN202420783211.6U
Authority: CN
Inventors: 林秀杰
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-04-16
Filing date: 2024-04-16
Publication date: 2024-07-02
Anticipated expiration: 2034-04-16

Abstract

The application discloses a battery and electric equipment, wherein the battery comprises a box body and a plurality of battery monomers, the box body is accommodated with cooling liquid, at least one part of the battery monomers is accommodated in the box body and immersed in the cooling liquid, the box body is provided with a bottom wall, and the bottom wall bears the plurality of battery monomers; wherein, the battery monomer is close to the one end of diapire and is provided with pressure release mechanism, and the diapire is provided with at least one first through-hole, and first through-hole sets up relatively with at least one battery monomer pressure release mechanism, can improve battery reliability.

Description

Battery and electric equipment

Technical Field

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

Background

Along with the development of new energy technology, the application of the battery is more and more extensive, the battery has higher energy density, higher safety, long service life and environmental protection to the social environment, and the battery has been widely applied to the aspects of passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, power stations, engineering manufacture, intelligent appliances and the like, and simultaneously promotes the technical development and research of communication terminals, medical appliances, energy development and the like.

In battery technology, how to improve the reliability of a battery is a technical problem to be solved.

Disclosure of utility model

The embodiment of the application provides a battery and electric equipment, which can effectively improve the reliability of the battery.

In a first aspect, an embodiment of the present application provides a battery, including a case and a plurality of battery cells, where the case contains a cooling liquid, the battery cells are contained in the case and at least a part of the battery cells are immersed in the cooling liquid, the case has a bottom wall, and the bottom wall carries a plurality of the battery cells;

The battery cell is close to one end of diapire is provided with pressure release mechanism, the diapire is provided with at least one first through-hole, first through-hole and at least one battery cell pressure release mechanism set up relatively.

In the technical scheme, the pressure release mechanism is convenient for releasing the emission in the battery unit, and the reliability of the battery is improved. The diapire of box sets up first through-hole, first through-hole with relief mechanism sets up relatively, and relief mechanism can directly release the battery outside the battery with the free emission of battery through first through-hole, reduces the free emission of battery in the battery to coolant temperature or other parts's influence to improve battery reliability.

In some embodiments, the first through holes are provided in plurality, and the first through holes are in one-to-one correspondence with the battery cells.

In the technical scheme, the first through holes are in one-to-one correspondence with the battery monomers, and the discharge of each battery monomer discharges the battery from the corresponding first through hole, so that the discharge path is shortened to a greater extent, the discharge effect is improved, and the reliability of the battery is improved.

In some embodiments, the battery further comprises a first bracket housed in the case, at least a portion of the first bracket being located between the bottom wall and the plurality of battery cells, the first bracket being provided with a second through hole opposite the pressure release mechanism, the second through hole communicating with the first through hole.

In the above technical scheme, the first bracket is at least partially positioned between the bottom wall and the plurality of battery cells, and the first bracket and the bottom wall bear the plurality of battery cells together.

In some embodiments, a plurality of positioning grooves are formed in one side, facing away from the bottom wall, of the first support, the positioning grooves correspond to the battery cells one by one, a part of the battery cells is accommodated in the positioning grooves, and the second through holes are formed in the bottoms of the positioning grooves.

In the technical scheme, the positioning grooves are used for positioning the battery monomers, and the plurality of battery monomers are grouped, so that the structural stability of the battery can be improved. In addition, the positioning groove can be used for positioning the battery monomer, so that the risk that the discharge of the battery monomer is influenced by the dislocation of the pressure release mechanism and the second through hole due to the displacement of the battery monomer is reduced.

In some embodiments, the battery further comprises a first seal disposed between the first support and the battery cell, the first support and the battery cell being sealingly connected by the first seal.

Among the above-mentioned technical scheme, the leakproofness between first support and the battery monomer can be improved to first sealing member, reduces the cooling liquid and leaks the risk from the gap department between first support and the battery monomer, reduces the risk that battery monomer's emission or other foreign matter outside the battery get into in the battery simultaneously, improves the battery reliability.

In some embodiments, the inner peripheral surface of the positioning groove is provided with a first groove extending in the circumferential direction of the positioning groove, and the first seal is at least partially located in the first groove.

According to the technical scheme, the first groove can limit the first sealing element, so that the displacement risk of the first sealing element is relieved, and the sealing reliability of the first sealing element is improved.

In some embodiments, the first support includes a first body and a first guiding portion, the first body is a rectangular plate, the positioning groove is disposed in the first body, the first body has a first surface deviating from the bottom wall, the first guiding portion is disposed in a corner of the first surface and protrudes from the first surface, and the first guiding portion is used for guiding the battery cell to enter the positioning groove.

In the above technical scheme, the first guide part can guide the battery monomer to enter the positioning groove, so that the assembly difficulty of the battery monomer is reduced.

In some embodiments, the battery further comprises a second seal disposed between the first bracket and the inner surface of the case, the first bracket and the inner surface of the case being sealingly connected by the second seal.

In the technical scheme, the second sealing piece can improve the tightness between the first support and the inner surface of the box body, reduce the leakage risk of cooling liquid from the gap between the first support and the inner surface of the box body, and improve the reliability of the battery.

In some embodiments, the case includes a top wall disposed opposite the bottom wall;

The battery also comprises a second bracket and a converging part, wherein the second bracket is accommodated in the box body and divides the space between the first bracket and the top wall into a heat exchange cavity and an electric cavity, and the second bracket is provided with a plurality of third through holes; an electrode terminal is arranged at one end of the battery monomer, which is far away from the pressure release mechanism, and is exposed from the third through hole; the converging component is arranged in the electric cavity and is used for realizing the electric connection of a plurality of battery cells.

Among the above-mentioned technical scheme, first support is heat exchange chamber and electric cavity with the space separation between first support and the roof, in the heat exchange chamber, carry out heat exchange by coolant liquid and battery monomer direct contact, in the electric cavity, the part of converging realizes that a plurality of battery monomers are electric to be connected, thermal management system and electric connection system separate each other, i.e. thermoelectric separation, the part of converging does not contact with coolant liquid, the part of converging does not adhere to electrolyte, do benefit to the later stage and maintain the part of converging or other parts in the electric cavity, improve battery maintainability, improve battery reliability.

In some embodiments, the battery further comprises a third seal, one end of the battery cell is in sealing connection with the second bracket through the third seal, and the third seal is arranged around the third through hole.

In the technical scheme, the third sealing piece can improve the isolation effect of the heat exchange cavity and the electric cavity, and reduce the risk that cooling liquid enters the electric cavity from the gap between the second bracket and the battery monomer.

In some embodiments, the wall of the third through hole is provided with a second groove extending in the circumferential direction of the third through hole, and at least a part of the third seal is located in the second groove.

According to the technical scheme, the second groove can limit the third sealing element, so that the displacement risk of the first sealing element is relieved, and the sealing reliability of the third sealing element is improved.

In some embodiments, the second support has a second surface facing the electrical cavity, the electrode terminals protruding from the second surface.

In the above technical scheme, the electrode terminal protrudes from the second surface, so that the connection between the bus member and the electrode terminal is more convenient.

In some embodiments, the battery further includes a fourth seal, and the outer circumferential surface of the second bracket is sealingly connected to the inner surface of the case through the fourth seal.

According to the technical scheme, the fourth sealing piece can reduce the risk that cooling liquid enters the electric cavity from the gap between the second bracket and the inner surface of the box body, and improves the isolation effect of the heat exchange cavity and the electric cavity.

In some embodiments, the second bracket is provided with a third groove on its outer circumferential surface, and at least a portion of the fourth seal is located in the third groove.

According to the technical scheme, the third groove can limit the fourth sealing element, so that the displacement risk of the second sealing element is relieved, and the sealing reliability of the fourth sealing element is improved.

In some embodiments, the second bracket includes a second body and a second guide portion, the second body is a rectangular plate, the third through hole is disposed in the second body, the second body has a second surface facing the electric cavity, the second guide portion is disposed at an angular position of the second surface and protrudes from the second surface, and the second guide portion is used for guiding the battery cell to enter the third through hole.

In the technical scheme, the second guide part can guide the battery monomer to enter the third through hole, so that the assembly difficulty of the second bracket and the battery monomer is reduced.

In some embodiments, the battery cells are cylindrical.

In a second aspect, an embodiment of the present application provides an electric device, where the electric device includes the battery, and the battery is used to supply power to the electric device.

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 as limiting the scope, and 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 application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

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

FIG. 4 is a cross-sectional view of a battery according to some embodiments of the application along the XZ plane;

FIG. 5 is a cross-sectional view of a battery according to other embodiments of the present application taken along the XZ plane;

FIG. 6 is a schematic view of a first bracket according to other embodiments of the present application;

fig. 7 is a schematic view showing a partial structure of a battery according to some embodiments of the present application;

FIG. 8 is an exploded view of a battery according to further embodiments of the present application;

Fig. 9 is a schematic view illustrating an internal structure of a battery according to some embodiments of the present application;

FIG. 10 is a cross-sectional view of a battery according to still other embodiments of the present application taken along the XZ plane;

FIG. 11 is a schematic view of a second bracket according to some embodiments of the present application;

FIG. 12 is a schematic flow diagram of a coolant according to some embodiments of the application;

FIG. 13 is a schematic view illustrating a structure of a first spoiler according to some embodiments of the application;

FIG. 14 is a schematic view illustrating another view of a first spoiler according to some embodiments of the present application;

fig. 15 is a schematic structural view of a second spoiler according to some embodiments of the application.

Icon: 100-cell; 10-battery cell group; 11-battery cells; 111-electrode terminals; 112-a pressure release mechanism; 113-a housing; 114-end caps; 115-electrode assembly;

20-a box body; 20 a-a first sub-tank; 20 b-a second sub-tank; 20 c-accommodation space; 201 c-a heat exchange cavity; 202 c-an electrical cavity; 21-a first sidewall; 22-a second sidewall; 23-a liquid inlet; 24-a liquid outlet; 25-mounting part; 26-top wall; 27-a bottom wall; 271-a first via; 30-a first spoiler; 31-a first turbulence body; 311-fourth through holes; 312-fifth through holes; 313-fourth surface; 32-a first barrier; 321-arc plates; 40-a second spoiler; 41-a second turbulence body; 411-sixth through holes; 412-seventh through holes; 42-a second barrier;

50-a second scaffold; 51-a second body; 511-a third through hole; 512-second groove; 513-a second surface; 514-a third groove; 52-a second guide;

60-a first scaffold; 61-a first body; 611-a second through hole; 612—a first surface; 613-positioning grooves; 614-first groove; 615-fourth grooves; 62-a first guide;

70-a confluence part;

81-a first seal; 82-a second seal; 83-a third seal; 84-fourth seal;

1000-vehicle; 200-motor; 300-a controller; z-a first direction; x-a second direction; y-third direction.

The figures are not drawn to scale.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying 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 of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. 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 above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The term "or" in the present application is merely an association relation describing an association object, and indicates that two relations may exist, for example, a or B may indicate: there are two cases, a alone and B alone.

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

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

In the present application, the battery cell may include, but is not limited to, 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. The battery cells include, but are not limited to, cylinders, flat bodies, rectangular solids, or other shapes, etc. The battery cells generally comprise cylindrical battery cells, square battery cells, soft package battery cells and the like in a packaging mode.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions moving between the positive and negative electrode plates, with metal ions (e.g., lithium ions) being inserted and extracted back and forth between the positive and negative electrodes. The isolating film is arranged between the positive electrode and the negative electrode, can play a role in preventing the short circuit of the positive electrode plate and the negative electrode plate, and can enable active ions to pass through.

The positive 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 positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The positive current collector may be a metal foil or a composite current collector. For example, as the metal foil, surface-silver-treated aluminum, surface-silver-treated stainless steel, copper, aluminum, carbon electrode, carbon, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

The negative electrode sheet 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 negative electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, surface-silver-treated aluminum, surface-silver-treated stainless steel, copper, aluminum, carbon electrode, carbon, nickel, titanium, or the like can be used. 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 roll-to-roll structure or a laminate structure.

Reference to a battery in accordance with an embodiment 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 can reduce the influence of liquid or other foreign matters on the charge or discharge of the battery cells.

References to emissions from a battery cell in the present application include, but are not limited to, electrolyte, dissolved or split positive and negative electrode sheets, fragments of separator film, high temperature and pressure gases generated by the reaction, flame, and the like.

The development of battery technology is taking into consideration various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, and the reliability of the battery.

In the immersed battery, the battery monomer is immersed in the cooling liquid, the battery monomer is directly contacted with the cooling liquid, and the extremely high heat transfer rate is realized through the direct contact between the battery monomer and the cooling liquid.

In such a submerged battery, the emission in the battery cell is not discharged or is improperly discharged, which may result in a decrease in reliability of the battery cell, and how the emission of the battery cell is discharged becomes a problem.

In view of this, in order to solve the problem of low reliability of the battery, the embodiment of the application provides a technical scheme, in which a pressure relief structure is arranged at one end of the battery unit, which is close to the bottom wall of the battery, the pressure relief structure is used for releasing the emission of the battery unit, at least one through hole is arranged in the box body, and the through hole is arranged opposite to the pressure relief structure.

Through set up pressure release mechanism at the battery monomer, discharge battery monomer with the free emission of battery, through set up the through-hole at the diapire of box for the free emission of pressure release mechanism discharge battery through the through-hole, thereby improve the free reliability of battery.

The technical scheme disclosed by the embodiment of the application is applicable to, but not limited to, batteries and electric equipment using the batteries.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, concrete shakers, and electric planers, among others.

For convenience of description, the following embodiments take the electric device as the vehicle 1000 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application, a battery 100 is disposed in the vehicle 1000, and the battery 100 may be disposed 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 300 and a motor 200, the controller 300 being configured to control the battery 100 to power the motor 200, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the 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.

In some embodiments, referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application, and the battery 100 includes a battery cell stack 10, a case 20, and a bus member 70. The plurality of battery cells 11 may be connected in series, parallel or series-parallel. The series-parallel connection refers to that the plurality of battery cells 11 are connected in series or in parallel.

The battery cell group 10 includes a plurality of battery cells 11, and the plurality of battery cells 11 may be electrically connected through the bus member 70, so as to realize series connection, parallel connection, or series-parallel connection of the plurality of battery cells 11. The bus member 70 may be a metal conductor such as copper, iron, aluminum, steel, aluminum alloy, or the like.

The battery cell 11 is accommodated in the case 20. The case 20 may include a first sub-case 20a and a second sub-case 20b, the first sub-case 20a and the second sub-case 20b being overlapped with each other to define a receiving space 20c for receiving the battery cell 11. Of course, the connection between the first sub-tank 20a and the second sub-tank 20b may be sealed by a sealing member (not shown), which may be a sealing ring, a sealant, or the like.

The first sub-tank 20a and the second sub-tank 20b may have various shapes, such as a rectangular parallelepiped, a cylinder, and the like. The first sub-tank 20a may have a hollow structure with one side opened, and the second sub-tank 20b may have a hollow structure with one side opened, and the open side of the second sub-tank 20b is closed to the open side of the first sub-tank 20a, thereby forming the tank 20 having the accommodation space 20 c. Of course, the first sub-casing 20a may be a hollow structure with one side opened, the second sub-casing 20b may be a plate-like structure (as shown in fig. 2), and the second sub-casing 20b may be covered on the opened side of the first sub-casing 20a to form the casing 20 having the accommodation space 20 c.

In some embodiments, referring to fig. 3, fig. 3 is an exploded schematic view of a battery cell 11 according to some embodiments of the present application, the battery cell 11 may include a housing 113, an electrode assembly 115, an end cap 114, an electrode terminal 111, and other functional components.

The case 113 is a member for accommodating the electrode assembly 115, and the case 113 may have a hollow structure having one end opened, or the case 113 may have a hollow structure having both ends opened. The material of the housing 113 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The housing 113 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc. Illustratively, in fig. 3, the housing 113 is rectangular parallelepiped.

The end cap 114 is a member that covers the opening of the case 113 to isolate the internal environment of the battery cell 11 from the external environment. The end cap 114 is capped at the opening of the case 113, and the end cap 114 and the case 113 together define a sealed space for accommodating the electrode assembly 115, the electrolyte, and other functional components. The shape of the end cover 114 may be adapted to the shape of the housing 113, for example, the housing 113 is a cuboid structure, the end cover 114 is a rectangular plate structure adapted to the housing 113, for example, the housing 113 is a cylindrical structure, and the end cover 114 is a circular plate structure adapted to the housing 113. The material of the end cap 114 may also be various, and the end cap 114 may be a metal material, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 114 may be the same as or different from the material of the housing 113.

In the battery cell 11, the end caps 114 may be one or two. If the shell 113 is a hollow structure with one end forming an opening, one end cover 114 is correspondingly arranged; if the housing 113 has a hollow structure with openings at both ends, two end caps 114 are correspondingly disposed, and the two end caps 114 are respectively covered on the two openings of the housing 113.

The electrode terminals 111 are members for drawing current, and the electrode terminals 111 may be provided on the end cap 114 or on the case 113, and the electrode terminals 111 may be one or two. Optionally, one electrode terminal 111 is provided, the electrode terminal 111 is provided on the end cap 114, the electrode terminal 111 is a positive electrode of the battery cell 11, and the case 113 is a negative electrode of the battery cell 11.

The embodiment of the present application provides a battery 100 capable of improving the reliability of the battery 100, and a specific structure of the battery 100 will be described in detail with reference to the accompanying drawings.

For convenience of description, taking the rectangular battery 100 as an example, the height direction of the battery 100 is defined as a first direction Z, the length direction of the battery 100 is defined as a second direction X, and the width direction of the battery 100 is defined as a third direction Y.

Fig. 4 is a cross-sectional view of battery 100 along the XZ plane of some embodiments of the present application.

Referring to fig. 4 in combination with fig. 3, an embodiment of the present application provides a battery 100, where the battery 100 includes a case 20 and a plurality of battery cells 11, the case 20 contains a cooling liquid, the battery cells 11 are contained in the case 20 and at least a part of the battery cells 11 are immersed in the cooling liquid, the case 20 has a bottom wall 27, and the bottom wall 27 carries the plurality of battery cells 11.

Wherein, the end of the battery cell 11 near the bottom wall 27 is provided with a pressure release mechanism 112, the bottom wall 27 is provided with at least one first through hole 271, and the first through hole 271 is opposite to the pressure release mechanism 112 of the at least one battery cell 11.

The cooling liquid is a fluid that is in direct contact with the battery cells 11 to exchange heat, thereby equalizing the internal temperature of the battery 100. The cooling liquid is an insulating fluid, and the cooling liquid may be hydrofluoroether or the like. The battery cells 11 may be immersed in the cooling liquid or may be partially immersed in the cooling liquid. For example, the electrode terminals 111 of the battery cells 11 are exposed to the coolant, and the other portions are immersed in the coolant.

The pressure release mechanism 112 refers to an element or component that releases the internal pressure or temperature of the battery cell 11 when the internal pressure or temperature reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold value may depend on the material of one or more of the positive electrode tab, the negative electrode tab, the electrolyte and the separator in the battery cell 11. The pressure release mechanism 112 may take the form of, for example, an explosion-proof valve, an explosion-proof sheet, a gas valve, a pressure release valve, a safety valve, or a score (see fig. 3), and may specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell 11 reaches a predetermined threshold, the pressure release mechanism 112 performs an action or a weak structure provided in the pressure release mechanism 112 is broken, thereby forming an opening or passage through which the internal pressure or temperature can be released.

The pressure release mechanism 112 on the battery cell 11 has an important influence on the safety of the battery 100. For example, when a short circuit, overcharge, or the like occurs, thermal runaway may occur inside the battery cell 11 and thus pressure or temperature rises. Actuation by pressure relief mechanism 112 in this case may release the internal pressure and temperature outwardly to prevent explosion and fire of cell 11.

The battery cell 11 is provided with the relief mechanism 112 near the one end of diapire 27, i.e. the relief mechanism 112 sets up towards diapire 27.

The first through hole 271 is a discharge passage through which the discharge of the power supply unit 11 is discharged out of the battery 100, and the second through hole 611 penetrates the bottom wall 27. In operation of pressure relief mechanism 112, first throughbore 271 communicates with an opening or passageway formed by pressure relief mechanism 112. The first through hole 271 may be configured in a circular shape, a rectangular shape, a special shape, or the like, as long as the discharged matter can be discharged.

The first through hole 271 is disposed opposite to the pressure release mechanism 112 of at least one battery cell 11, and the opposite arrangement means that the first through hole 271 is disposed opposite to the thickness direction of the bottom wall 27 of the pressure release mechanism 112. It should be noted that the relative arrangement is not strictly opposite, and allows the first through hole 271 and the pressure release mechanism 112 to be offset to some extent.

Wherein the number of the first through holes 271 may be one or more. The first through-holes 271 may be one-to-one, i.e., one-to-one, with the battery cells 11; the first through hole 271 and the battery cells 11 may be one-to-many, for example, one first through hole 271 corresponds to two pressure release mechanisms 112 of two battery cells 11; the first through holes 271 and the battery cells 11 may also be many-to-one, for example, two first through holes 271 correspond to the pressure release mechanism 112 of one battery cell 11.

The pressure release mechanism 112 facilitates venting of emissions within the battery cell 11, improving the reliability of the battery 100. The bottom wall 27 of the box 20 is provided with the first through hole 271, the first through hole 271 is opposite to the pressure release mechanism 112, and the pressure release mechanism 112 can directly release the discharged matter of the battery cell 11 to the outside of the battery 100 through the first through hole 271, so that the influence of the discharged matter of the battery cell 11 on the temperature of cooling liquid or other components in the battery 100 is reduced, and the reliability of the battery 100 is improved.

To improve the pressure relief effect of the pressure relief mechanism 112, in some embodiments, along the thickness direction of the bottom wall 27, the projection of the pressure relief mechanism 112 falls completely into the first through hole 271, reducing the shielding of the bottom wall 27 to the pressure relief mechanism 112.

Referring to fig. 4, in some embodiments, the first through-holes 271 are provided in plurality, and the first through-holes 271 are in one-to-one correspondence with the battery cells 11.

It is understood that the first through holes 271 are in one-to-one correspondence with the pressure release mechanisms 112 of each battery 100, and one first through hole 271 corresponds to one pressure release mechanism 112.

The first through holes 271 are in one-to-one correspondence with the battery cells 11, and the discharge of each battery cell 11 is discharged from the corresponding first through hole 271 to the battery 100, so that the discharge path is shortened to a greater extent, the discharge effect is improved, and the reliability of the battery 100 is improved.

Fig. 5 is a cross-sectional view of battery 100 along the XZ plane of other embodiments of the present application.

Referring to fig. 5 and 6, in some embodiments, the battery 100 further includes a first bracket 60, the first bracket 60 is accommodated in the case 20, at least a portion of the first bracket 60 is located between the bottom wall 27 and the plurality of battery cells 11, the first bracket 60 is provided with a second through hole 611 opposite to the pressure release mechanism 112, and the second through hole 611 communicates with the first through hole 271.

The first bracket 60 is a support member provided on the inner surface of the bottom wall 27. The shape of the first bracket 60 may be adapted to the case 20, and the shape of the first bracket 60 includes, but is not limited to, a circle, a rectangle, an ellipse, a special shape, or the like. Alternatively, the case 20 is rectangular, and the second bracket 50 is a rectangular plate. The material of the second bracket 50 includes, but is not limited to, plastic, rubber, and the like.

At least a portion of the first bracket 60 is located between the bottom wall 27 and the plurality of battery cells 11, which means that at least a portion of the first bracket 60 is disposed between the bottom wall 27 and the plurality of battery cells 11 in the thickness direction of the bottom wall 27. It is understood that the first bracket 60 is disposed at a side of the battery cell 11 where the pressure release mechanism 112 is disposed.

Wherein, the first bracket 60 may be partially located between the bottom wall 27 and the plurality of battery cells 11, and the first bracket 60 may be entirely located between the bottom wall 27 and the plurality of battery cells 11, for example, the first bracket 60 is a flat plate.

The second through hole 611 is a discharge passage for the discharge of the battery cell 11, and the first through hole 271 communicates with an opening or passage formed by the pressure release mechanism 112 through the second through hole 611 when the pressure release mechanism 112 is in operation. The second through hole 611 penetrates the first bracket 60 in the thickness direction of the bottom wall 27, and the first through hole 271 corresponds to the second through hole 611 in the first direction Z.

The second through hole 611 may be configured in a circular shape, a rectangular shape, a special shape, or the like, as long as the discharged material can be discharged.

The second through holes 611 may be in one-to-one correspondence with the first through holes 271, or one second through hole 611 may correspond to two or more first through holes 271, or two or more second through holes 611 may correspond to one first through hole 271. Alternatively, the second through holes 611 are in one-to-one correspondence with the first through holes 271, and one second through hole 611 communicates with one first through hole 271. Illustratively, the second through holes 611 are arranged in an array of twelve rows and five columns, and the plurality of second through holes 611 in each row are arranged at intervals along the second direction X, and the plurality of second through holes 611 in each column are arranged at intervals along the third direction Y.

In this embodiment, the first bracket 60 is at least partially located between the bottom wall 27 and the plurality of battery cells 11, and the first bracket 60 and the bottom wall 27 together bear the plurality of battery cells 11.

With continued reference to fig. 6, in some embodiments, a plurality of positioning grooves 613 are disposed on a side of the first support 60 facing away from the bottom wall 27, the positioning grooves 613 are in one-to-one correspondence with the battery cells 11, a portion of the battery cells 11 is accommodated in the positioning grooves 613, and the second through holes 611 are disposed at bottoms of the positioning grooves 613.

The side of the first bracket 60 facing away from the bottom wall 27 is defined as a first surface 612, the first surface 612 facing the area where the cooling liquid is located.

The positioning groove 613 is a limiting groove formed by recessing the first surface 612, and the positioning groove 613 may be configured as a circular groove, a rectangular groove, or the like. The positioning groove 613 and the battery cell 11 may have appropriate shapes.

The positioning grooves 613 are in one-to-one correspondence with the second through holes 611, and one second through hole 611 is formed at the bottom of each positioning groove 613. The end surface of the battery cell 11 provided with the pressure release mechanism 112 abuts against the groove bottom of the positioning groove 613.

The positioning groove 613 positions the battery cells 11, groups the plurality of battery cells 11, and can improve the structural stability of the battery 100. In addition, the positioning groove 613 can position the battery cell 11 to reduce the risk that displacement of the battery cell 11 causes misalignment of the pressure release mechanism 112 and the second through hole 611 to affect discharge of the discharged material of the battery cell 11.

Fig. 7 is a partial schematic structure of a battery 100 according to some embodiments of the present application.

Referring to fig. 7 in combination with fig. 6, in some embodiments, the battery 100 further includes a first seal 81, the first seal 81 being disposed between the first bracket 60 and the battery cell 11, the first bracket 60 and the battery cell 11 being sealingly connected by the first seal 81.

The first sealing member 81 fills the material or part of the gap between the first holder 60 and the battery cell 11, and the structural form of the first sealing member 81 includes, but is not limited to, a gel, a rubber ring, a silicone ring, or a gel-to-rubber ring, etc. The rubber ring is matched with the rubber ring, namely, the first bracket 60 is matched with the battery cell 11 through the first sealing member 81, and then the rubber ring is coated with rubber for sealing.

In this embodiment, the first sealing member 81 can improve the tightness between the first bracket 60 and the battery cell 11, reduce the risk of leakage of the cooling liquid from the gap between the first bracket 60 and the battery cell 11, reduce the risk of the discharge of the battery cell 11 or other foreign matters outside the battery 100 entering the battery 100, and improve the reliability of the battery 100.

In some embodiments, the inner circumferential surface of the positioning groove 613 is provided with a first groove 614, the first groove 614 extending in the circumferential direction of the positioning groove 613, and the first seal 81 being at least partially located in the first groove 614.

The inner circumferential surface of the positioning groove 613 is a surface of the positioning groove 613 facing the battery cell 11, and the inner circumferential surface of the positioning groove 613 includes a sidewall of the positioning groove 613 and a groove bottom of the positioning groove 613. If the first groove 614 is provided at the sidewall of the positioning groove 613, the first sealing member 81 is positioned between the groove wall of the positioning groove 613 and the battery cell 11; if the first groove 614 is provided at the groove bottom of the positioning groove 613, the first seal 81 is located between the groove of the positioning groove 613 and the end wall of the battery cell 11 where the pressure release mechanism 112 is provided. Illustratively, the first groove 614 is provided at the groove wall of the positioning groove 613, and the first seal 81 is provided around the battery cell 11.

The first groove 614 can limit the first sealing element 81, so that the displacement risk of the first sealing element 81 is relieved, and the sealing reliability of the first sealing element 81 is improved.

With continued reference to fig. 6, in some embodiments, the first bracket 60 includes a first body 61 and a first guiding portion 62, the first body 61 is a rectangular plate, the positioning groove 613 is disposed on the first body 61, the first body 61 has a first surface 612 facing away from the bottom wall 27, the first guiding portion 62 is disposed at an angular position of the first surface 612 and protrudes from the first surface 612, and the first guiding portion 62 is used for guiding the battery cell 11 into the positioning groove 613.

The first guide 62 is a member that guides the battery cell 11 into the corresponding positioning groove 613. The first guide 62 may be in the form of a guide surface, a guide block, or the like.

The angular position is the corner region where two adjacent sides of the first body 61 are in transitional connection.

The first body 61 is a rectangular plate, the first body 61 has four corners on the XY plane, the first guide 62 may be disposed at one or more corners of the first body 61, and the first guide 62 may be disposed at each corner of the first body 61.

The first guiding part 62 can guide the battery cell 11 to enter the positioning groove 613, and the assembly difficulty of the battery cell 11 is reduced.

Referring to fig. 7, in some embodiments, the battery 100 further includes a second seal 82, the second seal 82 being disposed between the first bracket 60 and the inner surface of the case 20, the first bracket 60 and the inner surface of the case 20 being sealingly connected by the second seal 82.

The inner surface of the case 20 refers to a surface of the case 20 facing the accommodating space 20 c.

The second seal 82 is a material or component that seals the gap between the inner surface of the case 20 and the first bracket 60. The second seal 82 may be disposed between the first bracket 60 and the side wall of the case 20, and the second seal 82 may also be disposed between the first bracket 60 and the bottom wall 27. Illustratively, as shown in fig. 7, the second seal 82 is disposed between the bottom wall 27 of the case 20 and the first bracket 60, and a surface of the first bracket 60 facing the bottom wall 27 is provided with a fourth groove 615, and at least a portion of the second seal 82 is received in the fourth groove 615.

The second seal 82 may be configured in a manner including, but not limited to, a gel, a rubber ring, a silicone ring, a gel-to-rubber ring, etc. The rubber ring is matched with the rubber ring, namely, the second sealing member 82 is arranged between the first bracket 60 and the inner surface of the box body 20, and then the rubber ring is matched with the rubber ring for coating.

In this embodiment, the second sealing member 82 can improve the tightness between the first bracket 60 and the inner surface of the case 20, reduce the risk of leakage of the cooling liquid from the gap between the first bracket 60 and the inner surface of the case 20, and improve the reliability of the battery 100.

Fig. 8 is an exploded view of a battery 100 according to other embodiments of the present application; fig. 9 is a schematic view illustrating an internal structure of a battery 100 according to some embodiments of the present application; fig. 10 is a cross-sectional view of battery 100 along the XZ plane of further embodiments of the present application; fig. 11 is a schematic structural view of a second bracket 50 according to some embodiments of the present application.

Referring to fig. 10, in some embodiments, the case 20 includes a top wall 26 disposed opposite a bottom wall 27, the top wall 26 being disposed opposite the bottom wall 27 along a first direction Z. The housing 20 also includes side walls connecting the bottom wall 27 with the top wall 26.

Thermoelectric separation refers to separation of the thermal management system from the electrical connection system, which can improve the reliability of the battery 100.

To improve the thermoelectric separation effect, referring to fig. 8 to 11, in some embodiments, the battery 100 further includes a second holder 50 and a confluence part 70, the second holder 50 is received in the case 20 and divides a space between the first holder 60 and the top wall 26 into a heat exchange chamber 201c and an electrical chamber 202c, and the second holder 50 is provided with a plurality of third through holes 511. An electrode terminal 111 is arranged at one end of the battery cell 11, which is far away from the pressure release mechanism 112, and the electrode terminal 111 is exposed from the third through hole 511; the bus member 70 is disposed in the electric chamber 202c, and the bus member 70 is used to electrically connect the plurality of battery cells 11.

The second holder 50 is a holder structure for fixing the plurality of battery cells 11 so as to group the plurality of battery cells 11. The second brackets 50 are spaced apart from the first brackets 60 along the first direction Z, with the second brackets 50 being located between the first brackets 60 and the top wall 26. Illustratively, as shown in fig. 10, a first bracket 60 secures an end of the battery cell 11 adjacent to the bottom wall 27 and a second bracket 50 secures an end of the battery cell 11 adjacent to the top wall 26.

The second bracket 50 divides the interior of the case 20 into a heat exchange chamber 201c and an electrical chamber 202c, and it is understood that the second bracket 50 is a common isolation member between the heat exchange chamber 201c and the electrical chamber 202c, and the heat exchange chamber 201c is not in communication with the electrical chamber 202 c. It should be understood that the heat exchange chamber 201c is a space for exchanging heat between the heat exchange system and the battery cell 11, the cooling liquid is a part of the thermal management system, the cooling liquid is contained in the heat exchange chamber 201c, the electric chamber 202c is a space for containing the electric connection system, the converging component 70 is a part of the electric connection system, and other components such as a wire harness, a sampling member, etc. may be disposed in the electric chamber 202c in addition to the converging component 70.

The shape of the second bracket 50 may be adapted to the case 20, and the shape of the second bracket 50 includes, but is not limited to, a circle, a rectangle, an ellipse, a special shape, or the like. Alternatively, the case 20 is rectangular, and the second bracket 50 is a rectangular plate. The material of the second bracket 50 includes, but is not limited to, plastic, rubber, and the like.

The second bracket 50 may be attached to the case 20 by bonding, clamping, interference fit, or the like. Of course, the second bracket 50 and the case 20 may be integrally formed. Optionally, a clamping groove is formed on the side wall of the case 20 to clamp the edge of the second bracket 50. The edge of the second bracket 50 is hermetically connected to the case 20.

The electrode terminal 111 is exposed from the third through hole 511, that is, the side of the electrode terminal 111 facing the electric cavity 202c is exposed from the third through hole 511, so that the first bus member 70 in the electric cavity 202c can be connected to the electrode terminal 111. The structure of the battery cell 11 exposed from the third through hole 511 is isolated from the heat exchange chamber 201c and is not in contact with the cooling liquid. The third through hole 511 may expose a part or all of the electrode terminal 111. Illustratively, as shown in fig. 9, the end wall of the battery cell 11 where the electrode terminal 111 is provided is also exposed from the third through hole 511, and the electrode terminal 111 is entirely exposed from the third through hole 511.

The shape of the third through-hole 511 may be adapted to the shape of the battery cell 11, and the shape of the third through-hole 511 includes, but is not limited to, a circle, a rectangle, an ellipse, and the like.

Illustratively, as shown in fig. 9 and 11, the battery cells 11 are cylindrical, the third through holes 511 are round holes, the third through holes 511 are in one-to-one correspondence with the battery cells 11, and the plurality of third through holes 511 are arranged in twelve rows and five columns.

In this embodiment, the space between the first bracket 60 and the top wall 26 is divided into a heat exchange cavity 201c and an electrical cavity 202c by the first bracket 60, in the heat exchange cavity 201c, the cooling liquid is in direct contact with the battery cells 11 to exchange heat, in the electrical cavity 202c, the current collecting member 70 realizes the electrical connection of the plurality of battery cells 11, the thermal management system and the electrical connection system are separated from each other, namely, are thermally and electrically separated, the current collecting member 70 is not in contact with the cooling liquid, the electrolyte is not attached to the current collecting member 70, the current collecting member 70 or other components in the electrical cavity 202c are maintained in a later period, the maintainability of the battery 100 is improved, and the reliability of the battery 100 is improved.

Referring to fig. 7, 9 and 11, in some embodiments, the battery 100 further includes a third sealing member 83, one end of the battery cell 11 is sealingly connected to the second holder 50 through the third sealing member 83, and the third sealing member 83 is disposed around the third through-hole 511.

The third seal 83 is a material or member that fills the gap between the second bracket 50 and the battery cell 11. Illustratively, in fig. 9, a third seal 83 is disposed between the housing 113 of the cell 11 and the wall of the third through-hole 511, the third seal 83 being disposed around the cell. Of course, in other embodiments, the third seal 83 may also be provided between the second holder 50 and the end wall of the battery cell 11 where the electrode terminal 111 is provided.

The structure of the third sealing member 83 may refer to the first sealing member 81, and will not be described herein.

The third seal 83 can improve the isolation of the heat exchange chamber 201c from the electrical chamber 202c, reducing the risk of coolant entering the electrical chamber 202c from the gap between the second bracket 50 and the battery cell 11.

Referring to fig. 7 and 11, in some embodiments, the wall of the third through-hole 511 is provided with a second groove 512, the second groove 512 extending in the circumferential direction of the third through-hole 511, and at least a portion of the third seal 83 is located in the second groove 512.

The second groove 512 is understandably an annular groove extending in the circumferential direction of the third through hole 511.

The second groove 512 can limit the third sealing element 83, so that the displacement risk of the first sealing element 81 is relieved, and the sealing reliability of the third sealing element 83 is improved.

In some embodiments, the second support 50 has a second surface 513 facing the electrical cavity 202c, and the electrode terminal 111 protrudes from the second surface 513.

The second surface 513 is the surface of the second bracket 50 facing the top wall 26. The electrode terminal 111 may partially protrude from the second surface 513, or the electrode terminal 111 may entirely protrude from the second surface 513.

The electrode terminals 111 protrude from the second surface 513, so that the connection of the bus member 70 with the electrode terminals 111 is more convenient.

In some embodiments, the battery 100 further includes a fourth seal 84, and the outer circumferential surface of the second bracket 50 is sealingly connected to the inner surface of the case 20 by the fourth seal 84.

The second holder 50 has two opposite surfaces in the thickness direction of the second holder 50, and a surface connecting the two surfaces in the thickness direction of the second holder 50 is an outer peripheral surface of the second holder 50.

In the present embodiment, the inner surface of the case 20 is a surface of the side wall of the case 20 facing the accommodation space 20 c.

The fourth seal 84 is a material or member that fills the gap between the outer peripheral surface of the second bracket 50 and the inner surface of the case 20. The fourth seal 84 may extend one revolution in the circumferential direction of the second bracket 50. The structural form of the fourth seal 84 may refer to the second seal 82, and will not be described herein.

The fourth seal 84 can reduce the risk of the coolant entering the electric cavity 202c from the gap between the second bracket 50 and the inner surface of the case 20, and improve the isolation effect of the heat exchange cavity 201c from the electric cavity 202 c.

Referring to fig. 7, in some embodiments, the outer peripheral surface of the second bracket 50 is provided with a third groove 514, and at least a portion of the fourth seal 84 is located within the third groove 514.

Specifically, the third groove 514 may be an annular groove extending one turn in the circumferential direction of the second bracket 50, and the notch of the third groove 514 may be directed toward the side wall of the case 20.

The third groove 514 can limit the fourth sealing element 84, so that the displacement risk of the second sealing element 82 is relieved, and the sealing reliability of the fourth sealing element 84 is improved.

Referring to fig. 11, in some embodiments, the second bracket 50 includes a second body 51 and a second guide part 52, the second body 51 is a rectangular plate, the third through hole 511 is disposed at the second body 51, the second body 51 has a second surface 513 facing the electrical cavity 202c, the second guide part 52 is disposed at an angle of the second surface 513 and protrudes from the second surface 513, and the second guide part 52 is used for guiding the battery cell 11 into the third through hole 511.

The second guide 52 is a member for guiding the battery cell 11 to penetrate the corresponding third through hole 511 when the battery cell 11 is assembled. The second guide 52 may be in the form of a guide surface, a guide block, or the like.

The angular position is the corner region where two adjacent sides of the second body 51 are transitionally connected.

The second guide 52 may be provided at one or more angular positions of the second body 51, and the second guide 52 may be provided at each angular position of the second body 51.

The second guiding portion 52 can guide the battery cell 11 into the third through hole 511, so as to reduce the assembling difficulty of the second bracket 50 and the battery cell 11.

FIG. 12 is a schematic flow diagram of a coolant according to some embodiments of the application; fig. 13 is a schematic structural view of a first spoiler 30 according to some embodiments of the present application; FIG. 14 is a schematic view illustrating another view of the first spoiler 30 according to some embodiments of the present application; fig. 15 is a schematic structural view of a second spoiler 40 according to some embodiments of the present application.

In order to improve the cooling liquid temperature equalizing effect, a spoiler may be disposed in the heat exchange cavity 201 c. Referring to fig. 12 to 15, the battery 100 further includes a first spoiler 30 and a second spoiler 40, the first spoiler 30 and the second spoiler 40 being disposed between the second bracket 50 and the first bracket 60, the second spoiler 40 being located between the first spoiler 30 and the second bracket 50, the first spoiler 30 and the second spoiler 40 being spaced apart from the first bracket 60, the second spoiler 40 being spaced apart from the second bracket 50 along the first direction Z.

In fig. 12, the flow direction of the coolant is shown by arrows, and the larger the arrows, the larger the flow rate.

The thickness direction of the first spoiler 30 and the thickness direction of the second spoiler 40 are parallel to the first direction Z, along the thickness direction of the first spoiler 30, the first spoiler 30 and the second spoiler 40 are located between the liquid inlet 23 and the liquid outlet 24, and the first spoiler 30 is located at one side of the second spoiler 40 facing away from the second bracket 50. The edge of the first spoiler 30 is disposed in a spaced relationship with the sidewall of the housing 20. The edge of the second spoiler 40 is disposed in a spaced relationship with the sidewall of the housing 20.

In some embodiments, the first spoiler 30 is provided with a plurality of fourth through holes 311, the battery cells 11 are disposed through the fourth through holes 311, the first spoiler 30 is further provided with a plurality of fifth through holes 312, and along the thickness direction of the first spoiler 30, the projection of each fifth through hole 312 falls into the gaps formed between the plurality of battery cells 11.

The first spoiler 30 is a member for disturbing the flow direction of the coolant and improving the coolant flow. The shape of the first spoiler 30 may be various, and may be accommodated in the case 20, and the shape of the first spoiler 30 includes, but is not limited to, rectangular, elliptical, irregular, etc., and as shown in fig. 13, the first spoiler 30 is illustratively a rectangular plate. The material of the first spoiler 30 includes, but is not limited to, plastic, rubber, and the like.

Among them, the fifth through hole 312 is a passage through which the cooling liquid flows, and the fifth through hole 312 allows the cooling liquid to pass therethrough, thereby disturbing the flow direction of the cooling liquid. The shape of the fifth through hole 312 includes, but is not limited to, circular, rectangular, convex, etc., and illustratively, the fifth through hole 312 is a circular hole.

The gaps formed between the plurality of battery cells 11 mean gaps formed between the plurality of battery cells 11 forming the battery cell group 10 in groups, i.e., gaps formed between adjacent battery cells 11.

In some embodiments, the plurality of fourth through holes 311 are arranged in M rows and N columns, the plurality of fourth through holes 311 in each row being spaced apart along the second direction X, the plurality of fourth through holes 311 in each column being spaced apart along the third direction Y, the second direction X being perpendicular to the first direction Z. Each fifth through hole 312 is located between two adjacent rows of fourth through holes 311 and two adjacent columns of fourth through holes 311.

M represents the number of rows of the fourth through holes 311, N represents the number of columns of the fourth through holes 311, the distance between two adjacent rows of the fourth through holes 311 is the row spacing of the fourth through holes 311, and the distance between two adjacent columns of the fourth through holes 311 is the column spacing of the fourth through holes 311. The values of M and N can be set according to specific needs, and the values of M and N can be the same or different. Illustratively, as shown in fig. 13, a plurality of fourth through holes 311 are arranged in a rectangular array, and a plurality of fourth through holes 311 are arranged in five rows and ten columns.

The first spoiler 30 is provided with a fourth through hole 311 and a fifth through hole 312, the fourth through hole 311 is used for allowing the power supply unit 11 to pass through, the fifth through hole 312 is used for allowing the cooling liquid to pass through, the fifth through hole 312 can disturb the flowing direction of the cooling liquid, the cooling liquid is guided to flow along the thickness direction of the first spoiler 30, the fluidity of the cooling liquid is improved, the cooling liquid is more uniformly mixed, the temperature difference of the cooling liquid is balanced, the heat exchange effect is improved, the internal temperature of the battery 100 is balanced, and the reliability of the battery 100 is improved.

In some embodiments, the second spoiler 40 is provided with a plurality of sixth through holes 411, and the battery cells 11 are disposed through the sixth through holes 411. The second spoiler 40 is further provided with a plurality of seventh through holes 412, and the projection of each seventh through hole 412 falls into the gaps formed between the plurality of battery cells 11 in the first direction Z.

The second spoiler 40 is a member for disturbing the flow direction of the coolant and improving the flow of the coolant. The shape of the second spoiler 40 may be various, and may be accommodated in the case 20, and the shape of the second spoiler 40 includes, but is not limited to, rectangular, elliptical, irregular, etc., and the second spoiler 40 is illustratively a rectangular plate as shown in fig. 15. The material of the second spoiler 40 includes, but is not limited to, plastic, rubber, and the like.

The sixth through hole 411 may be arranged with reference to the fourth through hole 311, and the seventh through hole 412 may be arranged with reference to the fifth through hole 312, which will not be described here.

The fourth through hole 311 is a passage through which the coolant flows, and the fourth through hole 311 allows the coolant to pass therethrough, thereby disturbing the flow direction of the coolant.

The second spoiler 40 is provided with a sixth through hole 411 and a seventh through hole 412, the sixth through hole 411 is penetrated by the power supply unit 11, the seventh through hole 412 allows the cooling liquid to pass through, the seventh through hole 412 can disturb the flowing direction of the cooling liquid, the seventh through hole 412 guides the cooling liquid to flow along the thickness direction of the second spoiler 40, the spoiler effect is further enhanced, the fluidity of the cooling liquid is improved, the cooling liquid is more uniformly mixed, the temperature difference of the cooling liquid is balanced, the heat exchange effect is improved, the internal temperature of the battery 100 is balanced, and the reliability of the battery 100 is improved.

The first spoiler 30 includes a first spoiler body 31 and a first blocking portion 32, the first spoiler body 31 is provided with a plurality of fourth through holes 311 and a plurality of fifth through holes 312, each fourth through hole 311 is penetrated by a battery cell 11, the plurality of fourth through holes 311 are arranged in an array manner in five rows and ten columns, and the plurality of fifth through holes 312 are arranged in an array manner in four rows and nine columns. The ten fourth through holes 311 in each row are arranged at intervals in the second direction X, and the five fourth through holes 311 in each column are arranged at intervals in the third direction Y. Each fifth through hole 312 is located between two adjacent rows of fourth through holes 311 and two adjacent columns of fourth through holes 311. The projection of each fifth through hole 312 falls within the gap formed between the plurality of battery cells 11, and the projected area of the fifth through hole 312 is smaller than the projected area of the fourth through hole 311. The first turbulence body 31 has a fourth surface 313 facing the second support 50, the first blocking portion 32 is convexly disposed on the fourth surface 313, a row of fifth through holes 312 and a first blocking portion 32 are disposed between two adjacent rows of fourth through holes 311, and along the second direction X, the first blocking portion 32 is located at a side of the row of fifth through holes 312 away from the liquid inlet 23. The first blocking portion 32 includes five arc plates 321 connected in sequence, and the five arc plates 321 are in one-to-one correspondence with the row of fourth through holes 311. The second direction X, the first direction Z and the third direction Y are perpendicular to each other. The first blocking portion 32 is integrally formed with the first spoiler body 31.

The second spoiler 40 includes a second spoiler body 41 and a second blocking portion 42, the second spoiler body 41 is provided with a plurality of sixth through holes 411 and a plurality of seventh through holes 412, each sixth through hole 411 is penetrated by a battery cell 11, the plurality of sixth through holes 411 are arranged in an array in five rows and ten columns, and the plurality of seventh through holes 412 are arranged in an array in four rows and nine columns. Ten sixth through holes 411 in each row are arranged at intervals in the second direction X, and five sixth through holes 411 in each column are arranged at intervals in the third direction Y. Each seventh through hole 412 is located between two adjacent rows of sixth through holes 411 and two adjacent columns of sixth through holes 411. The projection of each seventh through hole 412 falls within the gap formed between the plurality of battery cells 11, and the projected area of the seventh through hole 412 is smaller than the projected area of the sixth through hole 411. The first blocking portion 32 is disposed on a side of the second spoiler body 41 facing the bottom wall 27 in a protruding manner, a row of seventh through holes 412 and a second blocking portion 42 are disposed between two adjacent rows of sixth through holes 411, and the second blocking portion 42 is located on a side of the row of sixth through holes 411 near the liquid outlet 24. The second blocking portion 42 has the same structure as the first blocking portion 32. The second blocking portion 42 is integrally formed with the second spoiler body 41.

In some embodiments, the first spoiler 30 is identical in structure to the second spoiler 40.

With continued reference to fig. 8, in some embodiments, the side walls of the case 20 are provided with mounting portions 25, the mounting portions 25 being used to effect placement and installation of the battery 100. The mounting portion 25 includes, but is not limited to, a hook, a mounting hole, a mounting sleeve, etc. Alternatively, the mounting portion 25 is a mounting hole, and the wall of the mounting hole is formed with an internal thread to be screwed with other components.

In some embodiments, the battery cell 11 is cylindrical.

The embodiment of the application also provides electric equipment, which comprises the battery 100, and the battery 100 is used for supplying power to the electric equipment.

Referring to fig. 3, 6 to 15, the embodiment of the present application also provides a battery 100, the battery 100 including a case 20, a first holder 60, a second holder 50, a battery cell group 10, a plurality of battery cells 11, a confluence part 70, a first spoiler 30, a second spoiler 40, a first seal 81, a second seal 82, a third seal 83, and a fourth seal 84.

The case 20 includes top and bottom walls 27 arranged opposite in the first direction Z, and side walls connecting the top wall 26 with the bottom wall 27.

The battery cell group 10 includes a plurality of battery cells 11, the battery cells 11 are cylindrical, an end wall of the battery cell 11 facing the top wall 26 is provided with an electrode terminal 111, and an end wall of the battery cell 11 facing the bottom wall 27 is provided with a pressure release mechanism 112.

The first bracket 60 is disposed on the bottom wall 27, the first bracket 60 fixes the lower end of the battery cell 11, and the second bracket 50 fixes the upper end of the battery cell 11.

The top wall 26, the second bracket 50, the second spoiler 40, the first spoiler 30, the first bracket 60, and the bottom wall 27 are sequentially arranged at intervals in the first direction Z.

The second bracket 50 divides the space between the top wall 26 and the first bracket 60 into a heat exchange chamber 201c and an electrical chamber 202c. The heat exchange chamber 201c contains electrolyte, and the first bracket 60 is a wall shared by the electric chamber 202c and the heat exchange chamber 201 c.

The battery unit 10 is disposed in the heat exchange cavity 201c, the battery unit 10 includes a plurality of battery units 11, the battery units 11 are cylindrical, the end wall of the battery unit 11 facing the top wall 26 is provided with an electrode terminal 111, and the end wall of the battery unit 11 facing the bottom wall 27 is provided with a pressure release mechanism 112. A part of the battery cell 11 is immersed in the cooling liquid.

The bus bar 70 is used to electrically connect the plurality of battery cells 11, and the bus bar 70 is located in the electrical cavity 202c.

The first bracket 60 includes a first body 61 and a first guiding portion 62, the second body 51 is a rectangular plate, the first body 61 has a first surface 612 facing away from the bottom wall 27, and the first guiding portion 62 is disposed at four corners of the first surface 612 and protrudes from the first surface 612.

The second bracket 50 includes a second body 51 and a second guide portion 52, the second body 51 is a rectangular plate, the third through hole 511 is disposed on the second body 51, the second body 51 has a second surface 513 facing the electrical cavity 202c, and the second guide portion 52 is disposed at four corners of the second surface 513 and protrudes from the second surface 513.

The first body 61 is provided with second through holes 611, the first support 60 is used for bearing a plurality of battery monomers 11, the first surface 612 is provided with positioning grooves 613 corresponding to the battery monomers 11, the positioning grooves 613 are in one-to-one correspondence with the battery monomers 11, the bottom wall 27 of each battery monomer 11 is abutted to the bottom of the positioning groove 613, the bottom of the positioning groove 613 is provided with second through holes 611 opposite to the pressure release mechanism 112, the second through holes 611 are in one-to-one correspondence with the battery monomers 11, the bottom wall 27 is provided with first through holes 271 corresponding to the second through holes 611, the second through holes 611 are in one-to-one correspondence with the first through holes 271, and the second through holes 611 are communicated with the first through holes 271. The sidewall of the positioning groove 613 is provided with a first groove 614, the first groove 614 extends one turn in the circumferential direction of the positioning groove 613, the first seal 81 is disposed between the first bracket 60 and the battery cell 11, the first seal 81 is disposed around the battery cell 11, and a portion of the first seal 81 is accommodated in the first groove 614. The side of the first bracket 60 facing away from the second bracket 50 is provided with a fourth groove 615, the second seal 82 is arranged between the first bracket 60 and the bottom wall 27, and a part of the second seal 82 is accommodated in the fourth groove 615.

The second body 51 is provided with third through holes 511, the third through holes 511 are in one-to-one correspondence with the battery cells 11, and the electrode terminals 111 are exposed from the third through holes 511. The second holder 50 has a second surface 513 facing the top wall 26, and the electrode terminal 111 protrudes from the second surface 513. The wall of the third through hole 511 is provided with a second groove 512, the second groove 512 extends one circle along the circumferential direction of the third through hole 511, the third sealing member 83 is arranged between the second bracket 50 and the battery cell 11, the first sealing member 81 is arranged around the battery cell 11, and a part of the third sealing member 83 is accommodated in the second groove 512. The outer circumferential surface of the second bracket 50 is provided with a third groove 514, and a fourth seal 84 is provided between the outer circumferential surface of the second bracket 50 and the inner surface of the side wall of the case 20, and a portion of the fourth seal 84 is accommodated in the third groove 514.

Referring to fig. 12, the case 20 has a first side wall 21 and a second side wall 22 arranged opposite to each other along a second direction X, which is perpendicular to the first direction Z, the first side wall 21 being provided with a liquid inlet 23, and the second side wall 22 being provided with a liquid outlet 24. Along the first direction Z, the liquid inlet 23 and the liquid outlet 24 are arranged in a staggered manner, the liquid inlet 23 is located at one end of the first side wall 21 close to the first bracket 60, the liquid outlet 24 is located at one end of the second side wall 22 close to the second bracket 50, and the liquid inlet 23 and the liquid outlet 24 are both communicated with the heat exchange cavity 201 c.

The first spoiler 30 and the second spoiler 40 are disposed between the first bracket 60 and the second bracket 50, the second spoiler 40 is disposed between the first spoiler 30 and the second bracket 50, the first spoiler 30 is spaced apart from the first bracket 60 along the first direction Z, and the second spoiler 40 is spaced apart from the second bracket 50.

The edge of the first spoiler 30 is disposed in a gap with the sidewall of the case 20, and the edge of the second spoiler 40 is disposed in a gap with the sidewall of the case 20. The edge of the first bracket 60 is disposed in a gap with the sidewall of the case 20, the edge of the second bracket 50 is disposed in a gap with the sidewall of the case 20, a distance L ₁ between the first spoiler 30 and the first sidewall 21 is smaller than a distance L ₂ between the first spoiler 30 and the second sidewall 22, and a distance L ₃ between the second spoiler 40 and the second sidewall 22 is smaller than a distance L ₄ between the second spoiler 40 and the first sidewall 21 along the second direction X.

Along the first direction Z, the liquid inlet 23 is located between the first spoiler 30 and the first bracket 60, and the liquid outlet 24 is located between the second spoiler 40 and the second bracket 50.

The thickness direction of the first spoiler 30 and the thickness direction of the second spoiler 40 are parallel to the first direction Z, and along the thickness direction of the first spoiler 30, the first spoiler 30 and the second spoiler 40 are located between the liquid inlet 23 and the liquid outlet 24. The edge of the first spoiler 30 is disposed in a spaced relationship with the sidewall of the housing 20. The edge of the second spoiler 40 is disposed in a spaced relationship with the sidewall of the housing 20.

The first spoiler 30 includes a first spoiler body 31 and a first blocking portion 32, the first spoiler body 31 is provided with a plurality of fourth through holes 311 and a plurality of fifth through holes 312, each fourth through hole 311 is penetrated by a battery cell 11, the plurality of fourth through holes 311 are arranged in an array manner in five rows and ten columns, and the plurality of fifth through holes 312 are arranged in an array manner in four rows and nine columns. The ten fourth through holes 311 in each row are arranged at intervals in the second direction X, and the five fourth through holes 311 in each column are arranged at intervals in the third direction Y. Each fifth through hole 312 is located between two adjacent rows of fourth through holes 311 and two adjacent columns of fourth through holes 311. The projection of each fifth through hole 312 falls within the gap formed between the plurality of battery cells 11, and the projected area of the fifth through hole 312 is smaller than the projected area of the fourth through hole 311. The first turbulence body 31 has a fourth surface 313 facing the first bracket 60, the first blocking portion 32 is convexly disposed on the fourth surface 313, a row of fifth through holes 312 and a first blocking portion 32 are disposed between two adjacent rows of fourth through holes 311, and along the second direction X, the first blocking portion 32 is located at a side of the row of fifth through holes 312 away from the liquid inlet 23. The first blocking portion 32 includes five arc plates 321 connected in sequence, and the five arc plates 321 are in one-to-one correspondence with the row of fourth through holes 311. The second direction X, the first direction Z and the third direction Y are perpendicular to each other. The first blocking portion 32 is integrally formed with the first spoiler body 31.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

The above embodiments are only for illustrating the technical solution of the present application, and are not intended to limit the present application, and various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery, comprising:

A plurality of battery cells;

The battery pack comprises a box body, a plurality of battery cells and a cooling device, wherein the box body is used for accommodating cooling liquid, the battery cells are accommodated in the box body, at least one part of the battery cells is immersed in the cooling liquid, and the box body is provided with a bottom wall, and the bottom wall is used for bearing a plurality of battery cells;

2. The battery according to claim 1, wherein a plurality of the first through holes are provided, and the first through holes are in one-to-one correspondence with the battery cells.

3. The battery of claim 1, wherein the battery further comprises:

The first support is accommodated in the box body, at least one part of the first support is located between the bottom wall and the plurality of battery cells, the first support is provided with a second through hole opposite to the pressure release mechanism, and the second through hole is communicated with the first through hole.

4. The battery of claim 3, wherein a plurality of positioning grooves are formed in one side, facing away from the bottom wall, of the first support, the positioning grooves correspond to the battery cells one by one, a part of the battery cells are accommodated in the positioning grooves, and the second through holes are formed in bottoms of the positioning grooves.

5. The battery of claim 4, wherein the battery further comprises:

The first sealing piece is arranged between the first support and the battery cell, and the first support is in sealing connection with the battery cell through the first sealing piece.

6. The battery according to claim 5, wherein an inner peripheral surface of the positioning groove is provided with a first groove extending in a circumferential direction of the positioning groove, and the first seal is at least partially located in the first groove.

7. The battery of claim 4, wherein the first bracket comprises a first body and a first guide portion, the first body is a rectangular plate, the positioning groove is formed in the first body, the first body has a first surface facing away from the bottom wall, the first guide portion is arranged at an angle of the first surface and protrudes from the first surface, and the first guide portion is used for guiding the battery cell to enter the positioning groove.

8. The battery of claim 3, wherein the battery further comprises:

The second sealing piece is arranged between the first support and the inner surface of the box body, and the first support is in sealing connection with the inner surface of the box body through the second sealing piece.

9. The battery of any one of claims 3-8, wherein the case includes a top wall disposed opposite the bottom wall;

The battery further includes:

The second bracket is accommodated in the box body, separates the space between the first bracket and the top wall into a heat exchange cavity and an electric cavity, and is provided with a plurality of third through holes;

an electrode terminal is arranged at one end of the battery monomer, which is far away from the pressure release mechanism, and is exposed from the third through hole;

And the converging part is arranged in the electric cavity and is used for realizing the electric connection of a plurality of battery cells.

10. The battery of claim 9, wherein the battery further comprises:

And one end of the battery cell is in sealing connection with the second bracket through the third sealing piece, and the third sealing piece is arranged around the third through hole.

11. The battery of claim 10, wherein a wall of the third through hole is provided with a second groove extending in a circumferential direction of the third through hole, at least a portion of the third seal being located in the second groove.

12. The battery of claim 10, wherein the second support has a second surface facing the electrical cavity, the electrode terminals protruding from the second surface.

13. The battery of claim 10, wherein the battery further comprises:

And the outer peripheral surface of the second bracket is in sealing connection with the inner surface of the box body through the fourth sealing piece.

14. The battery of claim 13, wherein the outer peripheral surface of the second bracket is provided with a third groove, and at least a portion of the fourth seal is located within the third groove.

15. The battery of claim 9, wherein the second bracket includes a second body and a second guide portion, the second body is a rectangular plate, the third through hole is provided in the second body, the second body has a second surface facing the electric cavity, the second guide portion is provided at an angular position of the second surface and protrudes from the second surface, and the second guide portion is used for guiding the battery cell into the third through hole.

16. The battery of any one of claims 1-8, wherein the cells are cylindrical.

17. A powered device comprising the battery of any of claims 1-16, the battery configured to power the powered device.