CN220382187U

CN220382187U - Battery and electricity utilization device

Info

Publication number: CN220382187U
Application number: CN202322848828.XU
Authority: CN
Inventors: 王曦童; 唐代春; 杜鑫鑫
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-01-23
Anticipated expiration: 2033-10-24

Abstract

The application provides a battery and an electric device. A battery, comprising: a battery cell on which an electrode terminal is provided; the first heat dissipation structure is internally provided with a first flow channel for fluid circulation, and the first flow channel is arranged around the electrode terminal. Through setting up a heat radiation structure to with the first flow path setting around battery cell's electrode terminal in the first heat radiation structure, with the quick heat dissipation of electrode terminal, radiating efficiency is high, and simple structure, the preparation is convenient.

Description

Battery and electricity utilization device

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a battery and an electric device.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

The working temperature of the battery cell is an important guarantee for the stable working of the battery cell. However, the current heat dissipation structure of the electrode terminals of the battery cells is inconvenient to assemble and inefficient.

Disclosure of Invention

An objective of the present embodiment is to provide a battery and an electric device, so as to solve the problems of inconvenient assembly and low efficiency of a heat dissipation structure of an electrode terminal in the related art.

In a first aspect, embodiments of the present application provide a battery, including:

a battery cell on which an electrode terminal is provided;

the first heat dissipation structure is internally provided with a first flow channel for fluid circulation, and the first flow channel is arranged around the electrode terminal.

In the technical scheme of this application embodiment, through setting up first heat radiation structure to with the first runner setting of first heat radiation structure around battery cell's electrode terminal, with dispel the heat fast to electrode terminal, radiating efficiency is high, and simple structure, the preparation is convenient.

In some embodiments, the first heat dissipation structure includes a heat conductive pipe, an inner portion of which forms a first flow passage, and the heat conductive pipe is disposed around the electrode terminal.

The heat conducting pipe is used, so that the heat conducting pipe can be conveniently manufactured and surrounds the electrode terminal to radiate the heat of the electrode terminal, is simple in structure and convenient to manufacture, and can be flexibly arranged according to the type and the size of the battery cell.

In some embodiments, the thermally conductive tube comprises a rigid tube; and/or the heat pipe comprises a hose.

The hard tube can be prefabricated in advance and then is directly sleeved on the corresponding electrode terminal, so that the production and the assembly are facilitated.

The hose can be conveniently wound on the electrode terminal, and is convenient to lay out.

In some embodiments, the heat conductive tube includes a first section surrounding the electrode terminal for at least one week.

The first section is wound around the electrode terminal for at least one revolution to facilitate winding and dissipate heat from the corresponding electrode terminal.

In some embodiments, the heat conductive pipe includes a plurality of second segments fitted around the circumferential side of the electrode terminal.

The plurality of second sections are matched to surround the electrode terminal, so that each second section only dissipates heat to a partial area of the electrode terminal, and the heat dissipation efficiency can be improved better.

In some embodiments, the heat pipe further comprises an inlet section connected to the inlet ends of the plurality of second sections, the inlet section for connecting to a supply port of the fluid and directing the fluid of the supply port into each of the second sections; and/or, the heat conducting pipe further comprises a pipe section connected with the outlet ends of the second sections, and the pipe section is used for connecting the reflux ports of the fluid and guiding the fluid of each second section to the reflux ports.

The inlet pipe section is arranged so as to be connected with the fluid supply port, and is connected with the plurality of second sections, so that the fluid can be guided into the plurality of second sections through the single inlet pipe section, the fluid can be conveniently supplied to each second section, and the second sections and the supply port can be conveniently assembled and assembled.

The pipe outlet section is arranged so as to be connected with the fluid reflux ports, the pipe outlet section is connected with the second sections, and fluid in the second sections can be guided to flow back and out through the single pipe outlet section, so that the second sections and the reflux ports can be assembled and assembled conveniently.

In some embodiments, the inlet end of the second section is connected to an inlet tube for connecting to a supply port of the fluid and directing the fluid of the supply port into the second section; and/or the outlet end of the second section is connected with an outlet pipe which is used for connecting a backflow port of the fluid and guiding the fluid of the second section to the backflow port.

An inlet pipe is arranged at the inlet end of the second section so as to be connected with a fluid supply port, and the fluid is conveniently led into the second section to be cooled and radiated.

An outlet pipe is arranged at the outlet end of the second section so as to be connected with a fluid backflow port, and the fluid in the second section is conveniently led to flow back and out.

In some embodiments, the electrode terminals are plural, and the heat conduction pipe on the peripheral side of at least two electrode terminals is wound by the same pipe fitting.

The heat conduction pipes on the peripheral sides of the at least two electrode terminals are wound by the same pipe fitting, and the first flow passages on the peripheral sides of the at least two electrode terminals can be sequentially communicated to form a series structure, so that fluid passes through the heat conduction pipes to cool the electrode terminals, and the number of end parts of the heat conduction pipes, which are required to be connected with a supply port and a return port of the fluid, is reduced, so that the heat conduction pipes are convenient to assemble.

In some embodiments, the heat conduction pipe on the peripheral side of the electrode terminal on the same battery cell is wound with the same pipe fitting.

The heat conducting pipe is wound on the electrode terminal of the same battery cell, so that the heat dissipation of the battery cell can be reduced conveniently, and the battery cell is convenient to manufacture and assemble.

In some embodiments, the electrode terminals are multiple, the heat conduction pipe on the periphery of at least one electrode terminal is wound by a single pipe fitting, and two ends of the heat conduction pipe are respectively connected with an inlet pipe and an outlet pipe; the inlet pipe is used for connecting a fluid supply port, and the outlet pipe is used for connecting a fluid return port.

The heat conducting pipe on the peripheral side of at least one electrode terminal is wound by a single pipe fitting, and the two ends of the heat conducting pipe are respectively connected with the inlet pipe and the outlet pipe, so that fluid can be independently guided to the electrode terminal for heat dissipation, and the heat dissipation efficiency of the electrode terminal is improved.

In some embodiments, the battery comprises at least one group of battery cells, and the heat conduction pipes on the electrode terminals corresponding to at least one group of battery cells are wound by the same pipe fitting.

The heat conduction pipes on the periphery sides of the electrode terminals of the same group of battery cells are wound by the same pipe fitting, and the first flow passages on the periphery sides of the electrode terminals can be sequentially communicated to form a series structure, so that fluid passes through the heat conduction pipes to cool the electrode terminals, and the number of the end parts of the heat conduction pipes, which are required to be connected with the supply port and the return port of the fluid, is reduced, so that the heat conduction pipes are convenient to assemble.

In some embodiments, at least the outer peripheral surface of the heat conductive tube has insulating properties; and/or the heat conduction pipe has a fire-resistant property at least at the outer peripheral surface.

The outer peripheral surface of the heat conducting pipe has insulating property, is wound on the electrode terminals, can play a good insulating and isolating role to a certain extent, reduces the short circuit risk, and particularly, the plurality of electrode terminals are arranged around the same heat conducting pipe, so that the short circuit risk can be reduced better.

At least the peripheral surface of the heat conduction pipe has fire-resistant property, and can play a certain role in fire prevention under the condition that the electrode terminal generates heat greatly, so that the risk of ignition of the battery monomer is reduced.

In some embodiments, the electrode terminals are a plurality;

the first flow channels on the peripheral sides of at least two electrode terminals are communicated in series; and/or the first flow channels on the peripheral sides of at least two electrode terminals are communicated in parallel.

The first flow passages on the peripheral sides of the at least two electrode terminals are sequentially communicated to form a series structure, so that fluid passes through the series structure to dissipate heat and cool the electrode terminals, and the number of end parts, which are required to be connected with a supply port and a return port of the fluid, of the first flow passages of the first heat dissipation structure is reduced, so that the series structure is convenient to assemble.

The first flow passages at the peripheral sides of the at least two electrode terminals are communicated in parallel, so that fluid can flow through the first flow passages of the electrode terminals respectively, the influence of heat generated by each electrode terminal on other battery cells is reduced, and the heat dissipation efficiency is improved.

In some embodiments, the battery includes at least one group of battery cells, and the first flow channels on corresponding electrode terminals of at least one group of battery cells are in series communication.

The first flow channels on the peripheral side of the electrode terminals of at least one group of battery cells are sequentially communicated to form a series structure, so that the number of the end parts of the heat conduction pipe, which are required to be connected with the supply port and the return port of the fluid, can be reduced for assembly.

In some embodiments, the battery further comprises:

the second heat dissipation structure is used for dissipating heat of the side face of the battery cell, and a second flow passage for fluid circulation is arranged in the second heat dissipation structure;

the first flow passage is communicated with the second flow passage in parallel.

The second heat dissipation structure is arranged to dissipate heat to the side face of the battery cell so as to improve the heat dissipation efficiency of the battery cell; the first flow passage and the second flow passage are communicated in parallel, so that the fluid is conveniently supplied, and the heat interaction between the first flow passage and the second flow passage can be reduced.

In some embodiments, the battery includes at least one set of battery cells, and the second heat dissipation structure is attached to a side of the at least one set of battery cells.

Attaching the second heat dissipation structure to the side surface of at least one group of battery cells, and dissipating heat of the attached battery cells through the second heat dissipation structure; particularly, under the condition that the second heat dissipation structure is attached to the side faces of the plurality of groups of battery monomers, one second heat dissipation structure can dissipate heat of the plurality of groups of battery monomers, so that the number of the second heat dissipation structures is reduced, and the assembly and the use are convenient.

In some embodiments, the number of the second heat dissipation structures is plural, and the plural second heat dissipation structures cooperatively cover plural groups of battery cells.

A plurality of second heat dissipation structures are used for covering a plurality of groups of battery cells in a matching way so as to realize heat dissipation of all the battery cells in the battery; and the single second heat dissipation structure can only dissipate heat of part of the battery cells so as to improve heat dissipation efficiency.

In some embodiments, the battery comprises a plurality of groups of battery cells, and two ends of the first runner corresponding to the electrode terminals of each group of battery cells are respectively connected with the inlet end and the outlet end of the second runner of the adjacent second heat dissipation structure.

The two ends of each first runner are connected with the inlet end and the outlet end of the second runner of the adjacent second heat dissipation structure, so that the connection is convenient, and the first runners corresponding to the electrode terminals of the plurality of groups of battery cells can be respectively supplied with fluid so as to improve the heat dissipation effect.

In some embodiments, two ends of the first flow channel are respectively connected with a connecting pipe, and the two connecting pipes are respectively used for connecting a supply port and a return port of the fluid.

Connecting pipes are respectively arranged at two ends of the first flow channel so as to conveniently connect a fluid supply port and a return port, and the fluid can conveniently enter and exit the first flow channel.

In a second aspect, embodiments of the present application provide an electrical device comprising a battery as described in any one of the embodiments above.

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

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required for the description of the embodiments or exemplary techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

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

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

fig. 3 is a schematic structural view of a battery cell according to some embodiments of the present application;

fig. 4 is a schematic exploded view of a battery cell according to some embodiments of the present application;

Fig. 5 is a schematic structural diagram of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated in a battery according to some embodiments of the present disclosure;

fig. 6 is a schematic structural diagram of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to other embodiments of the present disclosure;

fig. 7 is a schematic structural diagram of an assembled battery cell and a first heat dissipation structure in a battery according to some embodiments of the present disclosure;

fig. 8 is a schematic structural diagram illustrating an assembly of a battery cell and a first heat dissipation structure in a battery according to other embodiments of the present disclosure;

fig. 9 is a schematic structural diagram of an assembled battery cell and a first heat dissipation structure in a battery according to further embodiments of the present disclosure;

fig. 10 is a schematic structural view of a battery cell assembled with a first heat dissipation structure in a battery according to further embodiments of the present disclosure;

fig. 11 is a schematic structural diagram illustrating an assembly of a battery cell and a first heat dissipation structure in a battery according to other embodiments of the present disclosure;

fig. 12 is a schematic structural view of a battery cell assembled with a first heat dissipation structure in a battery according to still other embodiments of the present application;

fig. 13 is a schematic view illustrating a structure of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to other embodiments of the present disclosure;

fig. 14 is a schematic view of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to further embodiments of the present disclosure;

Fig. 15 is a schematic view of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to further embodiments of the present disclosure;

fig. 16 is a schematic view illustrating a structure of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to other embodiments of the present disclosure;

fig. 17 is a schematic structural diagram of a battery cell and a second heat dissipation structure in a battery according to some embodiments of the present disclosure;

fig. 18 is a schematic view of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to further embodiments of the present disclosure;

fig. 19 is a schematic view illustrating a structure of a battery cell, a first heat dissipation structure and a second heat dissipation structure separated from each other in a battery according to other embodiments of the present application.

Wherein, each reference numeral in the figure mainly marks:

1000-vehicle; 1001-battery; 1002-a controller; 1003-motor;

100-box body; 101-a first part; 102-a second part;

200-battery cells; 21-an electrode assembly; 211-electrode lugs; 22-a housing; 221-a housing; 222-end cap; 23-electrode terminals; 24-switching piece; 25-supporting plates; 26-a protective film;

300-a first heat dissipation structure; 31-a heat pipe; 310-a first flow channel; 311-first section; 312-second section; 313-pipe-in section; 314-pipe section; 321-an inlet pipe; 322-outlet pipe; 33-connecting pipes; 3101—a heat sink; 3102-opening holes;

400-a second heat dissipation structure; 410-second flow path.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit 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 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.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

Reference herein 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 present 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments in any suitable manner.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two). The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or be integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of embodiments of the present application, when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element unless explicitly stated and limited otherwise. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of embodiments of the present application, the technical term "adjacent" refers to in close proximity unless explicitly specified and defined otherwise. For example A ₁ 、A ₂ And three parts B, A ₁ Distance from B is greater than A ₂ Distance from B, then A ₂ Comparative A ₁ For A ₂ Closer to B, i.e. A ₂ Adjacent to B, also known as B adjacent to A ₂ . For another example, when there are a plurality of C-parts, the C-parts are C ₁ 、C ₂ ……C _N When one of the C-parts, e.g. C ₂ Closer to the B-component than to the other C-components, then B is adjacent to C ₂ C can also be said to be ₂ Adjacent B.

The battery cell in the embodiment of the application includes, 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 or a magnesium ion battery, and the like. The shape of the battery cell includes, but is not limited to, a cylinder, a flat body, a rectangular parallelepiped, or other shape, etc. The battery cells are typically packaged, including but not limited to, being divided into: cylindrical battery cells, prismatic battery cells, and pouch battery cells.

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 can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells to some extent. In some cases, the battery cells may be used directly, i.e., the battery may not include a case, which is not limited herein.

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

The battery cell in the embodiment of the application includes an electrode assembly and a case, the electrode assembly is mounted in the case, the case is a case structure having an accommodation space, and the electrode assembly is protected by the case after the electrode assembly is mounted in the case.

The electrode assembly is also called a battery cell, and consists of a positive plate, a negative plate and a diaphragm. The electrode assembly operates primarily by means of metal ions moving between the positive and negative electrode sheets. The positive plate comprises a positive current collector and a positive active material layer, wherein the positive active material layer is coated on the surface of the positive current collector, a part of the positive current collector, which is not coated with the positive active material layer, protrudes out of the part, which is coated with the positive active material layer, of the positive current collector, and the part, which is not coated with the positive active material layer, is used as a positive electrode lug, or a metal conductor is welded and led out of the positive current collector to be used as the 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 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 part of the negative electrode current collector, which is not coated with the negative electrode active material layer, protrudes out of the part coated with the negative electrode active material layer, the part of the negative electrode current collector, which is not coated with the negative electrode active material layer, is used as a negative electrode tab, or a metal conductor is welded and led out of the negative electrode current collector to be used as the 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. It is understood that in the electrode assembly, the number of positive electrode tabs may be one, and the number of negative electrode tabs may be one. That is, two groups of tabs are provided on the electrode assembly, each group includes at least one tab, one group of tabs is a positive tab, and the other group of tabs is a negative tab.

The electrode assembly may be a rolled structure or a laminated structure. The embodiments of the present application are not limited thereto. The winding structure is characterized in that the lugs are welded on the current collector and are arranged in the sequence of positive plates, diaphragms, negative plates and diaphragms; and winding to form a cylindrical or square battery cell. The lamination type structure is characterized in that a tab is led out of a current collector, a positive plate, a negative plate and a diaphragm are arranged in sequence from the positive plate to the diaphragm to the negative plate to the diaphragm, and the positive plate, the diaphragm and the negative plate are laminated layer by layer to form a lamination type battery cell; wherein the membrane may be cut and laminated directly with the membrane sheet, or the membrane may not be cut and laminated with a Z-fold. The separator may be made of PP (Polypropylene) or PE (Polyethylene). The diaphragm is the insulating film of setting between positive plate and negative plate, and its main roles are: the positive electrode and the negative electrode are isolated, electrons in the battery cannot pass through freely, short circuit is prevented, and ions in the electrolyte can pass through freely between the positive electrode and the negative electrode, so that a loop is formed between the positive electrode and the negative electrode. The positive and negative electrode sheets are collectively referred to as a pole sheet. The positive electrode tab and the negative electrode tab are collectively referred to as tabs.

In the use of the battery, the battery monomer can generate a large amount of heat, so that the service life of the battery can be greatly reduced, and therefore, a heat dissipation structure is often arranged in the battery to cool and dissipate heat of the battery monomer, so that good temperature is provided for the stable operation of the battery monomer. Because the electric current of battery monomer charge-discharge all is through electrode terminal, and the inside heat of battery monomer also easily goes out through electrode terminal, therefore, electrode terminal's temperature is often higher, dispels the heat to electrode terminal, can promote the radiating efficiency to the battery monomer. At present, heat is dissipated from the electrode terminals by welding a heat conducting plate to the electrode terminals and extending to the side surfaces of the battery cells to be connected with cooling plates in the battery, so that heat is conducted to the cooling plates, and therefore the heat is dissipated from the electrode terminals. However, in this way, the heat conductive plate needs to be welded to the electrode terminal, assembly is inconvenient, and efficiency is low by using heat conduction and heat dissipation.

Based on the above-mentioned consideration, in order to solve the problem that the electrode terminal heat dissipation structure of the battery cell is inconvenient to assemble and low in heat dissipation efficiency, the embodiment of the application provides a battery, by arranging a first heat dissipation structure with a first flow channel in the battery and arranging the first flow channel around the electrode terminal of the battery cell, the assembly is convenient; under the condition that the fluid flows through the first flow channel, heat on the electrode terminal can be taken away, and the heat dissipation efficiency is high.

The battery disclosed by the embodiment of the application can be used for a power device using the battery as a power source or various energy storage systems using the battery as an energy storage element, such as an energy storage power system applied to hydraulic power, firepower, wind power, solar power stations and the like. The power device may be, but is not limited to, a cell phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric automobile, 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, an embodiment of the present application provides an electric device, which is described by taking a vehicle 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. 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 1001 is provided in the interior of the vehicle 1000, and the battery 1001 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 1001 may be used for power supply of the vehicle 1000, for example, the battery 1001 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a motor 1003, the controller 1002 being configured to control the battery 1001 to power the motor 1003, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 1001 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, fig. 2 is an exploded view of a battery 1001 according to some embodiments of the present application. The battery 1001 includes a case 100 and a battery cell housed in the case 100. The case 100 is used to provide an accommodating space for the battery cell, and the case 100 may have various structures. In some embodiments, the case 100 may include a first portion 101 and a second portion 102, the first portion 101 and the second portion 102 being overlapped with each other, the first portion 101 and the second portion 102 together defining a receiving space for receiving the battery cell. The second portion 102 may be a hollow structure with one end opened, the first portion 101 may be a plate-shaped structure, and the first portion 101 covers the opening side of the second portion 102, so that the first portion 101 and the second portion 102 together define an accommodating space; the first portion 101 and the second portion 102 may be hollow structures each having an opening at one side, and the opening side of the first portion 101 is engaged with the opening side of the second portion 102. Of course, the case 100 formed by the first portion 101 and the second portion 102 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc. The plurality of battery cells are connected in parallel or in series-parallel combination and then placed in a box body 100 formed by buckling the first part 101 and the second part 102.

Referring to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of a battery cell 200 according to some embodiments of the present application, and fig. 4 is an exploded structural diagram of the battery cell 200 according to some embodiments of the present application.

The battery cell 200 includes an electrode assembly 21 and a case 22, and the electrode assembly 21 is mounted in the case 22. The case 22 refers to a case structure having an inner space, and the electrode assembly 21 is disposed in the inner space of the case 22 to protect the electrode assembly 21 by the case 22.

The battery cell 200 has a height direction, a width direction, and a thickness direction, wherein the Z direction in fig. 3 and 4 is the height direction of the battery cell 200, the X direction is the width direction of the battery cell 200, and the Y direction is the thickness direction of the battery cell 200. The electrode assembly 21 is mounted in the case 22 of the battery cell 200, the height direction of the battery cell 200 coincides with the height direction of the electrode assembly 21, and the height direction of the battery cell 200 coincides with the height direction of the case 22; the width direction of the battery cell 200 coincides with the width direction of the electrode assembly 21, and the width direction of the battery cell 200 coincides with the width direction of the case 22; the thickness direction of the battery cell 200 coincides with the thickness direction of the electrode assembly 21, and the thickness direction of the battery cell 200 coincides with the thickness direction of the case 22.

In some embodiments, the housing 22 includes a shell 221 and an end cap 222, the end cap 222 overlying the shell 221.

The end cap 222 refers to a member that covers the opening of the case 221 to isolate the internal environment of the battery cell 200 from the external environment. The shape of the end cap 222 may be adapted to the shape of the housing 221 to fit over the housing 221. Alternatively, the end cap 222 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cap 222 is not easy to deform when being extruded and collided, so that the battery cell 200 can have a higher structural strength, and the reliability can be improved. The material of the end cap 222 may also be various, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The case 221 is an assembly for cooperating with the end cap 222 to form an internal environment of the battery cell 200, wherein the formed internal environment may be used to accommodate the electrode assembly 21, the electrolyte, and other components. The case 221 and the end cap 222 may be separate components, and an opening may be provided in the case 221, and the interior of the battery cell 200 may be formed by covering the opening with the end cap 222 at the opening. The housing 221 may be of various shapes and various sizes, such as rectangular parallelepiped, hexagonal prism, etc. Specifically, the shape of the case 221 may be determined according to the specific shape and size of the battery cell 200. The material of the housing 221 may be various, including but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The case 221 and the end cap 222 are provided to form the case 22, which is convenient for manufacturing and assembling, and also is convenient for installing the electrode assembly 21 in the case 22.

In some embodiments, the battery cell 200 further includes a support plate 25, the support plate 25 being installed in the case 221 and supporting the electrode assembly 21 to stably support the electrode assembly 21 in the case 221. The pallet 25 may be made of a variety of materials including, but not limited to: copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

In some embodiments, the battery cell 200 further includes a protective film 26, and the protective film 26 is wrapped around the electrode assembly 21 to protect the electrode assembly 21 by the protective film 26, so that the electrode assembly 21 can be well prevented from loosening to some extent. When the protective film 26 has insulating properties, it is also possible to perform an insulating protection function for the electrode assembly 21, reducing the risk of short-circuiting between the electrode assembly 21 and the case 221.

In some embodiments, the protective film 26 may be a film such as PET (polyethylene glycol terephthalate, polyethylene terephthalate) film, or may be a PP film, a PE film, or the like.

In some embodiments, the electrode terminals 23 are provided on the case 22 of the battery cell 200. The electrode terminal 23 may be provided on one sidewall of the case 22, for example. The electrode terminal 23 may be disposed on the end cap 222, such as when the case 22 includes the case 221 and the end cap 222. Of course, the electrode terminal 23 may be provided on one side wall of the case 221. The electrode terminal 23 is electrically connected to the tab 211.

The electrode terminal 23 refers to a conductive member connected to the tab 211 of the electrode assembly 21 to output electric energy of the battery cell 200 or to charge the battery cell 200. Since the electrode terminal 23 is a conductive member of the battery cell 200 that mainly passes through the battery 1001, when the battery cell 200 is charged and discharged, a current needs to pass through the electrode terminal 23, which causes a large amount of heat to be generated at the electrode terminal 23; the heat of the electrode assembly 21 in the battery cell 200 is more easily conducted to the tab 211 through the current collector and then to the electrode terminal 23 through the tab 211, which makes the electrode terminal 23 more easily collect heat, and thus it is important to dissipate the heat of the electrode terminal 23. The battery cell 200 has two electrode terminals 23, the two electrode terminals 23 are connected to the positive electrode tab and the negative electrode tab of the electrode assembly 21, respectively, the electrode terminal 23 connected to the positive electrode tab is a positive electrode terminal, and the electrode terminal 23 connected to the negative electrode tab is a negative electrode terminal.

In some embodiments, referring to fig. 4, the battery cell 200 further includes two switching pieces 24, the two switching pieces 24 correspond to the two electrode terminals 23 respectively, each switching piece 24 is connected to the corresponding electrode terminal 23, and each switching piece 24 is connected to the corresponding tab 211, that is, each tab 211 is connected to the corresponding electrode terminal 23 through the switching piece 24, so that the connection between the tab 211 and the electrode terminal 23 is facilitated and the connection is more stable. For the sake of description, the tab 24 connected to the positive electrode terminal is referred to as a positive tab, and the positive tab is connected to the positive tab; the tab 24 connected to the negative electrode terminal is referred to as a negative tab, and the negative tab is connected to the negative tab.

Of course, in some embodiments, the electrode terminals 23 may also be directly welded to the corresponding tabs 211.

Referring to fig. 2 to 5, fig. 5 is a schematic diagram illustrating an internal structure of a battery 1001 according to some embodiments of the present application, and the battery cell 200, the first heat dissipation structure 300 and the second heat dissipation structure 400 in the battery 1001 are shown in the drawings.

Some embodiments of the present application provide a battery 1001 comprising: a battery cell 200, the battery cell 200 being provided with an electrode terminal 23; the first heat dissipation structure 300 is provided with a first flow channel 310 for fluid to circulate, and the first flow channel 310 is arranged around the electrode terminal 23.

The first heat dissipation structure 300 is a structure capable of cooling to perform cooling and heat dissipation.

The first flow channel 310 is a channel structure disposed inside the first heat dissipation structure 300, and fluid can circulate in the first flow channel 310 to take away heat in the first heat dissipation structure 300 by circulating fluid in the first flow channel 310, so as to achieve the effects of cooling and heat dissipation. The fluid may be a liquid; but may also be a gas such as a refrigerant or the like. In general, the fluid may be a liquid such as water or oil, which not only has good heat absorption performance, but also requires smaller pressure for flowing, and has lower strength requirement on the first heat dissipation structure 300, so that the cost for manufacturing the first heat dissipation structure 300 can be reduced.

Since the first flow channel 310 is a channel structure and needs to be in fluid communication, the first flow channel 310 has two ends for fluid to enter and exit, the end for fluid to enter can be called an inlet end or an inlet end, the end for fluid to exit can be called an outlet end, and the fluid exiting the first flow channel 310 is often recovered, so the outlet end can also be called a return end.

In use, it is necessary to supply fluid to the first flow channel 310 and recover the fluid flowing out of the first flow channel 310, and thus a fluid supply structure and a fluid recovery structure are provided, and the fluid supply structure is mainly used for supplying fluid with a lower temperature into the first flow channel 310 so as to take away heat in the first flow channel 310. The fluid recovery structure is mainly a structure that receives the fluid flowing out of the first flow passage 310. The fluid supply structure and the fluid recovery structure may be part of a fluid cooling structure, for example, a fluid outlet portion structure of the fluid cooling structure may be used as the fluid supply structure, and a fluid inlet portion structure of the fluid cooling structure may be used as the fluid recovery structure or may be a separate structure. The fluid supply structure and the fluid recovery structure may be provided inside the battery 1001 as part of the battery 1001. Of course, the fluid supply structure and the fluid recovery structure may be provided outside the battery 1001 as external additional structures.

The fluid supply structure and the fluid recovery structure need to communicate with the first flow passage 310, so a supply port needs to be provided in the fluid supply structure to be connected to an inlet end of the first flow passage 310, thereby supplying fluid into the first flow passage 310. A return port is required in the fluid recovery structure to be connected to the outlet end of the first flow channel 310, thereby recovering the fluid flowing out of the first flow channel 310.

The fluid supply structure may be directly connected to the inlet end of the first flow channel 310, but of course the inlet end of the first flow channel 310 may also be connected to the fluid supply structure by a connection tube 33. The fluid recovery structure may be directly connected to the outlet end of the first flow channel 310, and of course, the outlet end of the first flow channel 310 may also be connected to the fluid recovery structure through the connection pipe 33.

The first flow channel 310 surrounds the electrode terminal 23, that is, after the first heat dissipation structure 300 is assembled with the electrode terminal 23, the first flow channel 310 surrounds the periphery of the electrode terminal 23, so that heat on the electrode terminal 23 can be conducted into the first flow channel 310, and fluid flowing in the first flow channel 310 can take away part of heat, so as to cool and dissipate heat of the electrode terminal 23, and improve heat dissipation efficiency. In addition, the first flow channel 310 is arranged around the electrode terminal 23, and is not required to be welded with the electrode terminal 23 by heat conduction, so that the assembly is convenient, and the assembly efficiency is improved.

In the technical scheme of the embodiment of the application, the first heat dissipation structure 300 is arranged, and the first runner 310 in the first heat dissipation structure 300 is arranged around the electrode terminal 23 of the battery cell 200 so as to rapidly dissipate heat of the electrode terminal 23, so that the heat dissipation efficiency is high, the structure is simple, and the manufacturing is convenient.

In some embodiments, the first heat dissipation structure 300 includes a heat conductive pipe 31, the inside of the heat conductive pipe 31 forming a first flow channel 310, the heat conductive pipe 31 being disposed around the electrode terminal 23.

The heat pipe 31 is a pipe with good heat conduction properties, such as a pipe made of aluminum, copper, heat-conducting silica gel, etc. Because it is a tube, it is an elongated and hollow structure.

The formation of the first flow channel 310 inside the heat pipe 31 means that the hollow structure inside the heat pipe 31 may form the first flow channel 310, that is, fluid may circulate in the heat pipe 31.

The heat pipe 31 is disposed around the electrode terminal 23, which means that at least part of the heat pipe 31 is wound around the electrode terminal 23, for example, a section of the pipe may be wound around the electrode terminal 23 to be attached to the electrode terminal 23; the whole heat conducting tube 31 may be wound around the electrode terminal 23, so that heat on the electrode terminal 23 can be conducted into the heat conducting tube 31, and when fluid in the heat conducting tube 31 flows, the heat can be taken away to dissipate heat from the electrode terminal 23 and further from the battery cell 200.

The heat conduction pipe 31 is convenient to manufacture and surround the electrode terminal 23 to radiate heat of the electrode terminal 23, has a simple structure and convenient manufacture, and can be flexibly arranged according to the type and the size of the battery cell 200.

Since the first flow channel 310 is formed inside the heat conducting tube 31, the heat conducting tube 31 also has two ends for fluid to enter and exit, the end for fluid to enter can be called an inlet end or an inlet end, the end for fluid to exit can be called an outlet end, and the fluid exiting the heat conducting tube 31 is often recovered, so the outlet end can be called a return end.

In some embodiments, the thermally conductive tube 31 comprises a rigid tube.

The hard pipe is a pipe made of hard materials with certain structural strength. Preforming refers to the pipe fitting being preformed into a set shape.

The heat conductive pipe 31 uses a hard material having a certain structural strength, and may be preformed in a shape adapted to the electrode terminal 23 to be fitted over the electrode terminal 23, thereby realizing the arrangement of the heat conductive pipe 31 around the electrode terminal 23.

The hard tube can be prefabricated in advance and then directly sleeved on the corresponding electrode terminal 23, so that the production and the assembly are facilitated.

In some embodiments, the heat pipe 31 comprises a hose.

The hose is a pipe fitting which has certain flexibility and can be bent, such as an aluminum pipe, a copper pipe, a heat conducting rubber pipe and the like with thinner wall thickness can be used.

The hose can be conveniently wound on the electrode terminal 23, thereby facilitating layout.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating an internal structure of a battery 1001 according to some embodiments of the present application, wherein a battery cell 200, a first heat dissipation structure 300 and a second heat dissipation structure 400 in the battery 1001 are shown.

In some embodiments, the first heat dissipating structure 300 includes a heat dissipating plate 3101, where the heat dissipating plate 3101 refers to a plate made of a thermally conductive material. The heat dissipating plate 3101 is provided with a first flow path, and the heat dissipating plate 3101 is provided with an opening 3102 so that the electrode terminal 23 can be inserted into the opening 3102, so that the first flow path in the heat dissipating plate 3101 can surround the electrode terminal 23, and thus, heat generated from the electrode terminal 23 can be conducted to the heat dissipating plate 3101, and heat on the heat dissipating plate 3101 can be taken away by fluid in the first flow path, thereby dissipating heat from the electrode terminal 23. The heat radiating plate 3101 is used, and is simple in structure and convenient to assemble.

Referring to fig. 5 and fig. 7 to fig. 13, fig. 7 is a schematic structural diagram illustrating an assembly of a battery cell 200 and a first heat dissipation structure 300 in a battery 1001 according to some embodiments of the present application. Fig. 8 is a schematic structural diagram of an assembled battery cell 200 and a first heat dissipation structure 300 in another battery 1001 according to some embodiments of the present application. Fig. 9 is a schematic structural diagram of an assembled battery cell 200 and a first heat dissipation structure 300 in a third battery 1001 according to some embodiments of the present application. Fig. 10 is a schematic structural diagram of an assembled battery cell 200 and a first heat dissipation structure 300 in a fourth battery 1001 according to some embodiments of the present application. Fig. 11 is a schematic structural diagram of an assembled battery cell 200 and a first heat dissipation structure 300 in a fifth battery 1001 according to some embodiments of the present application. Fig. 12 is a schematic structural diagram of an assembled battery cell 200 and a first heat dissipation structure 300 in a sixth battery 1001 according to some embodiments of the present application. Fig. 13 is a schematic diagram illustrating an internal structure of a seventh battery 1001 according to some embodiments of the present application, where a battery cell 200, a first heat dissipation structure 300, and a second heat dissipation structure 400 in the battery 1001 are shown. Fig. 14 is a schematic diagram illustrating an internal structure of an eighth battery 1001 according to some embodiments of the present application, where a battery cell 200, a first heat dissipation structure 300, and a second heat dissipation structure 400 in the battery 1001 are shown. Fig. 15 is a schematic diagram illustrating an internal structure of a ninth battery 1001 according to some embodiments of the present application, where a battery cell 200, a first heat dissipation structure 300, and a second heat dissipation structure 400 in the battery 1001 are shown.

In some embodiments, referring to fig. 5, 7 to 10, the heat conductive pipe 31 includes a first section 311 surrounding the electrode terminal 23 for at least one week.

The first segment 311 is a partial segment on the guide heat pipe 31. The first section 311 surrounds the electrode terminal 23 and surrounds the electrode terminal 23 for at least one revolution such that the first flow passage 310 formed in the first section 311 surrounds the electrode terminal 23 for at least one revolution.

The first section 311 surrounds the electrode terminal 23 for at least one revolution to facilitate winding and to radiate heat to the corresponding electrode terminal 23.

Since the first section 311 is a part of the heat conductive pipe 31, the first section 311 also has two ends for fluid to enter and exit, and the end for fluid to enter may be referred to as an inlet end or an inlet end, and the end for fluid to exit may be referred to as an outlet end or a return end. The inlet end of the first section 311 is an end that is close to the inlet end of the entire heat pipe 31 in the fluid flow direction; the outlet end of the first section 311 is an end that is close to the outlet end of the entire heat pipe 31 in the fluid flow direction.

In some embodiments, referring to fig. 11 and 12, the heat conductive pipe 31 includes a plurality of second segments 312 fitted around the circumferential side of the electrode terminal 23.

The second segment 312 is a partial segment on the guide heat pipe 31.

The plurality of second segments 312 fitted around the circumferential side of the electrode terminal 23 means that the plurality of second segments 312 surround the circumferential side of the electrode terminal 23 such that the first flow channels 310 in the plurality of second segments 312 fit around the electrode terminal 23.

The plurality of second segments 312 are matched and surround the electrode terminal 23, so that each second segment 312 only dissipates heat to a partial area of the electrode terminal 23, and the plurality of second segments 312 jointly dissipates heat to the electrode terminal 23, thereby improving heat dissipation efficiency.

Since the second section 312 is a part of the heat conduction pipe 31, the second section 312 also has two ends for fluid to enter and exit, and the end for fluid to enter may be referred to as an inlet end or an inlet end, and the end for fluid to exit may be referred to as an outlet end or a return end. The inlet end of the second section 312 is an end that is close to the inlet end of the entire heat pipe 31 in the fluid flow direction; the outlet end of the second section 312 is an end that is close to the outlet end of the entire heat pipe 31 in the fluid flow direction.

In some embodiments, referring to fig. 11, the heat conductive pipe 31 further includes a pipe inlet section 313 connected to the inlet ends of the plurality of second sections 312, the pipe inlet section 313 being configured to connect to a fluid supply port and to direct the fluid from the supply port into each of the second sections 312.

The inlet section 313 is a partial section on the guide heat pipe 31. And the inlet section 313 is located at the inlet end of the second section 312. The inlet section 313 is adapted to be connected to a supply port for fluid so as to direct the fluid from the supply port into each of the second sections 312.

The inlet ends of the plurality of second sections 312 are connected to the inlet section 313, that is, the plurality of second sections 312 diverge from the inlet section 313 to form a plurality of branches for fluid communication, such that the fluid in the inlet section 313 splits into a plurality of different second sections 312 for directing the fluid through the inlet section 313 to the plurality of second sections 312.

The pipe insertion section 313 is provided so as to be connected to the fluid supply port, and the pipe insertion section 313 is connected to the plurality of second sections 312, so that the fluid can be guided into the plurality of second sections 312 through the single pipe insertion section 313 to facilitate the supply of the fluid to each of the second sections 312, and the number of pipe connections can be reduced to facilitate the assembly of the second sections 312 with the supply port.

In some embodiments, referring to fig. 11, the heat conducting tube 31 further includes a tube segment 314 connected to the outlet ends of the plurality of second segments 312, the tube segment 314 being configured to connect the return port of the fluid and to guide the fluid from each of the second segments 312 to the return port.

The outlet pipe section 314 is a partial section on the guide heat pipe 31. And the outlet pipe section 314 is located at the outlet end of the second section 312. The outlet pipe sections 314 are used to connect return ports for fluid to direct the fluid out of each second section 312.

The outlet ends of the second sections 312 are each connected to the outlet section 314, that is, the branches formed by the second sections 312 merge in the outlet section 314 such that fluid in the second sections 312 enters the outlet section 314 for flow to the return.

The pipe outlet 314 is provided to connect the fluid reflux ports, and the pipe outlet 314 is connected to the plurality of second sections 312, so that the fluid in the plurality of second sections 312 can be led to flow back and out through a single pipe outlet 314, and the number of the connected pipes can be reduced, so that the assembly and the assembly of the second sections 312 and the reflux ports are facilitated.

In some embodiments, referring to fig. 12, an inlet pipe 321 is connected to the inlet end of the second section 312, and the inlet pipe 321 is used to connect to a fluid supply port and guide the fluid from the supply port into the second section 312.

The inlet pipe 321 is a pipe provided at one end of the inlet end of the pipe, and the inlet pipe 321 may be a part of the heat transfer pipe 31 or a separate pipe. The inlet pipe 321 is used to connect the supply port of the fluid so as to guide the fluid of the supply port into the pipeline. An inlet pipe 321 is connected to the inlet end of the second section 312 to guide the fluid of the supply port into the corresponding second section 312.

An inlet pipe 321 is provided at the inlet end of the second section 312 to connect with a fluid supply port to facilitate the introduction of fluid into the second section 312 for cooling and heat dissipation. Since each electrode terminal 23 corresponds to a plurality of second sections 312, and each second section 312 is connected to the inlet pipe 321, the fluid flowing out from the supply port can be respectively guided to each second section 312, so that the influence of the fluid in other pipelines on the fluid in the second section 312 is reduced, and the heat dissipation efficiency is improved.

In some embodiments, referring to fig. 12, an outlet pipe 322 is connected to the outlet end of the second section 312, and the outlet pipe 322 is used to connect the return port of the fluid and guide the fluid of the second section 312 to the return port.

The outlet pipe 322 is a pipe member provided at one end of the outlet end of the pipe, and the outlet pipe 322 may be a partial section of the heat transfer pipe 31 or may be a separate pipe member. The outlet tube 322 is used to connect a return port for the fluid to direct the fluid out of the tubing. An outlet tube 322 is connected to the outlet end of the second section 312 to direct fluid out of the corresponding second section 312.

An outlet tube 322 is provided at the outlet end of the second section 312 to connect a return port for fluid to facilitate directing the return flow of fluid out of the second section 312. And because each electrode terminal 23 corresponds to a plurality of second sections 312, and each second section 312 is connected with the outlet pipe 322 respectively, the backflow of the fluid corresponding to the second section 312 can be conveniently guided, the backflow resistance of the fluid is reduced, the fluid can circulate in the second section 312 conveniently, the heat in the second section 312 can be conveniently taken away by the fluid, and the heat dissipation efficiency is improved.

In some embodiments, referring to fig. 5, 7, 9, 10, and 13 to 15, the electrode terminals 23 are plural, and the heat conduction tube 31 on the peripheral side of at least two electrode terminals 23 is wound by the same tube.

The plurality refers to two or more numbers. At least two refers to two or more.

The heat conducting pipes 31 on the peripheral sides of at least two electrode terminals 23 are wound by the same pipe, which means that different sections of one heat conducting pipe 31 respectively surround different electrode terminals 23 and at least surround two electrode terminals 23, so that the corresponding first flow passages 310 of the two electrode terminals 23 are sequentially connected, i.e. communicated in series.

The serial connection of the pipelines means that two or more pipelines are sequentially connected, and when the pipeline is used, flowing fluid sequentially passes through the pipelines, and the structure formed by the pipelines is called serial connection and can be simply called serial connection.

Parallel connection of pipelines means that the inlet ends of two or more pipelines are mutually communicated, and the outlet ends of the pipelines are mutually communicated, and the formed structure is called parallel connection and can be simply called parallel connection.

The heat conducting pipes 31 on the peripheral sides of the at least two electrode terminals 23 are wound by adopting the same pipe fitting, and the first flow passages 310 on the peripheral sides of the at least two electrode terminals 23 can be sequentially communicated to form a series structure, so that fluid passes through the heat conducting pipes to cool the electrode terminals 23, and the number of end parts of the heat conducting pipes 31, which are required to be connected with a supply port and a return port of the fluid, is reduced for assembly.

In some embodiments, referring to fig. 5, 7, 9, 10, and 13 to 15, the heat conductive pipes 31 on the peripheral side of the electrode terminals 23 on the same battery cell 200 are wound with the same pipe member.

The battery cell 200 is generally provided with two electrode terminals 23, a positive electrode terminal and a negative electrode terminal, respectively. The same pipe member is used for winding the heat conduction pipe 31 around the electrode terminal 23 on the same battery cell 200, that is, the same heat conduction pipe 31 is used to wind part of the heat conduction pipe on the positive electrode terminal on one battery cell 200 and part of the heat conduction pipe on the negative electrode terminal on the battery cell 200. In this way, the first flow channels 310 on the peripheral side of the electrode terminals 23 of the same battery cell 200 are the same flow channel.

The heat conducting pipe 31 is wound on the electrode terminal 23 of the same battery cell 200, so that the heat dissipation of the battery cell 200 can be reduced, the manufacturing is convenient, the end heads on the pipe fitting can be reduced, and the assembly is convenient.

In some embodiments, referring to fig. 8 and 9, the electrode terminals 23 are plural, the heat conduction tube 31 on the peripheral side of at least one electrode terminal 23 is wound by a single tube, and two ends of the heat conduction tube 31 are respectively connected with the inlet tube 321 and the outlet tube 322; the inlet pipe 321 is used for connecting a supply port of the fluid, and the outlet pipe 322 is used for connecting a return port of the fluid.

The inlet pipe 321 is a pipe provided at one end of the inlet end of the pipe, and the inlet pipe 321 may be a part of the heat transfer pipe 31 or a separate pipe. The inlet pipe 321 is used to connect the supply port of the fluid so as to guide the fluid of the supply port into the pipeline.

The outlet pipe 322 is a pipe member provided at one end of the outlet end of the pipe, and the outlet pipe 322 may be a partial section of the heat transfer pipe 31 or may be a separate pipe member. The outlet tube 322 is used to connect a return port for the fluid to direct the fluid out of the tubing.

The heat conductive pipe 31 on the peripheral side of the electrode terminals 23 is wound as a single pipe member, meaning that the heat conductive plate is wound on only one electrode terminal 23.

The two ends of the heat conducting pipe 31 are respectively connected with the inlet pipe 321 and the outlet pipe 322, so that the inlet pipe 321 directly guides the fluid to the heat conducting pipe 31 and flows out from the outlet pipe 322, and the influence of the fluid in other heat conducting pipes 31 can be reduced.

When the heat pipes 31 on the plurality of electrode terminals 23 are wound with a single pipe, respectively, and both ends of the heat pipes 31 are connected with the inlet pipe 321 and the outlet pipe 322, respectively, the parallel connection of the heat pipes 31 can be achieved.

The heat conducting tube 31 on the peripheral side of at least one electrode terminal 23 is wound by a single tube, and two ends of the heat conducting tube 31 are respectively connected with the inlet tube 321 and the outlet tube 322, so that fluid can be independently guided to the electrode terminal 23 for heat dissipation, and the heat dissipation efficiency of the electrode terminal 23 is improved.

In some embodiments, referring to fig. 5, 6, and 13 to 15, the battery 1001 includes at least one group of battery cells 200, and the heat conductive pipes 31 on the electrode terminals 23 corresponding to at least one group of battery cells 200 are wound by using the same pipe.

The multiple groups are two groups or more than two groups. A group of battery cells 200 may include one or more battery cells 200. Providing a plurality of sets of battery cells 200 can increase the capacity of the battery 1001. And the battery cells 200 are arranged in groups to facilitate assembly.

The heat pipes 31 on the electrode terminals 23 corresponding to the same group of battery cells 200 are wound by the same pipe, which means that one heat pipe 31 is wound on each electrode terminal 23 of the same group of battery cells 200, so that the heat pipes 31 can be conveniently wound on each electrode terminal 23, and the heat pipes 31 can be connected in series. As shown in fig. 5, 14 and 15, the heat pipes 31 corresponding to the electrode terminals 23 corresponding to the same group of battery cells 200 may be wound with one heat pipe 31.

The heat conducting pipes 31 on the periphery of the electrode terminals 23 of the same group of battery cells 200 are wound by adopting the same pipe fitting, and the first flow passages 310 on the periphery of the electrode terminals 23 can be sequentially communicated to form a series structure, so that fluid passes through the heat conducting pipes to radiate heat and cool the electrode terminals 23, and the number of end parts of the heat conducting pipes 31, which are required to be connected with a supply port and a return port of the fluid, is reduced for assembly.

In some embodiments, referring to fig. 13, the corresponding heat pipes 31 of the plurality of groups of battery cells 200 may be wound with one heat pipe 31 to reduce the number of ends of the heat pipe 31 that need to be connected to the supply port and the return port of the fluid for assembly.

Referring to fig. 2, 9 and 10, a plurality of battery cells 200 are provided, and the battery cells 200 are mounted in the case 100, there are portions of the battery cells 200 located at the edge positions of the case 100, and portions of the battery cells 200 located at the middle positions of the case 100. In addition, when the battery cells 200 are used, the battery cells 200 at the edge of the case 100 are more likely to emit heat, and the battery cells 200 at the middle position are more likely to be affected by the heat of other battery cells 200, so that the temperature of the battery cells 200 at the middle position tends to be higher.

In some embodiments, the battery cell 200 is provided in plurality, and the first flow channels 310 of the electrode terminals 23 of the battery cell 200 positioned at the middle position may be connected in parallel, or the electrode terminals 23 positioned at the middle position may be divided into a plurality of branches, each branch being connected in series with the first flow channels 310 on a few electrode terminals 23 in series, and then connected to the supply port and the return port of the fluid; in the electrode terminals 23 of the battery cells 200 located at the edge positions, a greater number of first flow channels 310 corresponding to the electrode terminals 23 are connected in series, and then connected to the supply port and the return port of the fluid, so that the battery cells 200 located at the middle positions can be cooled better, and the overall temperature of the battery 1001 can be balanced better.

In some embodiments, when the first heat dissipation structure 300 includes the heat conductive pipe 31 and winds the heat conductive pipe 31 around the electrode terminals 23 of the battery cells 200, the number of the electrode terminals 23 wound by one heat conductive pipe 31 is N for the battery cells 200 at the middle position, and the number of the electrode terminals 23 wound by one heat conductive pipe 31 is M for the battery cells 200 at the edge position, N may be smaller than M, so that heat dissipation of the battery cells 200 at the middle position may be faster relative to the battery cells 200 at the edge position, thereby balancing the overall temperature of the battery 1001.

Referring to fig. 5 to 15, in some embodiments, at least the outer peripheral surface of the heat pipe 31 has an insulating property.

The outer circumferential surface of the heat pipe 31 is the outer surface of the heat pipe 31. Insulation properties refer to the property of being insulating and non-conductive.

The outer peripheral surface of the heat conducting tube 31 has insulating property, and is wound on the electrode terminals 23, so that good insulating and isolating effects can be achieved to a certain extent, and short circuit risks are reduced, and particularly, the plurality of electrode terminals 23 are arranged around the same heat conducting tube 31, so that short circuit risks can be reduced better.

The outer surface of the heat conductive pipe 31 may be provided with an insulating layer to achieve an insulating property of the outer surface of the heat conductive pipe 31. The insulating layer refers to a film layer made of an insulating material. Of course, the heat conduction pipe 31 may be made of an insulating material, or may have an insulating property on its outer surface.

In some embodiments, at least the outer peripheral surface of the heat pipe 31 has fire resistant properties.

Fire resistance refers to fire resistance, which refers to the ability of a component, fitting, or structure to meet the stability, integrity, thermal insulation, and other desired functions specified in a standard fire resistance test over a period of time.

At least the outer peripheral surface of the heat pipe 31 has a fire-resistant property, and when the electrode terminal 23 generates a large amount of heat, a certain fire-resistant effect can be achieved, thereby reducing the risk of ignition of the battery cell 200.

Since the heat pipe 31 is wound around the electrode terminal 23, the outer surface of the heat pipe 31 mainly contacts the heat source, and thus the outer surface of the heat pipe 31 directly determines the fire resistance of the entire heat pipe 31.

The outer surface of the heat conductive pipe 31 may be provided with a refractory layer to achieve the refractory properties of the outer surface of the heat conductive pipe 31. The insulating layer refers to a film layer made of a refractory material. Of course, the heat transfer pipe 31 may be made of a refractory material, or may have a refractory property on its outer surface.

In some embodiments, the outer surface of the heat pipe 31 may be provided with a coating layer, and the coating layer may be made of materials such as fluororubber, PPO (Polyphenylene Oxide ), PPS (polyphenylene sulfide, thermoplastic engineering plastics having a phenylsulfide group in a molecular main chain, polyether plastics), PSF (polysulfonamide, polysulfone), polyaryl resin, polyarylsulfone, PE, PP, PVC (Polyvinyl chloride ), ABS (Acrylonitrile Butadiene Styrene, acrylonitrile-butadiene-styrene copolymer), PA (Polyamide, commonly called nylon), POM (Polyoxymethylene resin), PBT (polybutylene terephthalate ), PC (Polycarbonate, polycarbonate), PA46 (polybutylene amide, commonly called Polyamide 46, PA 46), PPA (polyphenylamide, polyamide-polyether-Polyamide), PARA (aromafic polyamides, polyaramide), PEEK (Polyetheretherketone), and the like, so as to provide the heat pipe 31 with fire-resistant and insulating properties.

In some embodiments, the heat pipe 31 may be made of materials such as fluororubber, PPO, PPS, PSF, polyarylate, polyarylsulfone, PE, PP, PVC, ABS, PA, POM, PBT, PC, PA, PPA, PARA, PEEK, etc., so that the heat pipe 31 has fire-resistant and insulating properties.

Referring to fig. 5, 7, and 9 to 15, in some embodiments, the electrode terminals 23 are plural; the first flow passages 310 on the peripheral side of at least two electrode terminals 23 are in series communication.

The first flow channels 310 on the circumferential side of at least two electrode terminals 23 are connected in series, which means that at least two first flow channels 310 corresponding to the electrode terminals 23 among the first flow channels 310 around all the electrode terminals 23 are connected in series.

The first flow channels 310 on the peripheral sides of at least two electrode terminals 23 are sequentially connected to form a series structure, so that fluid passes through the series structure to cool and dissipate heat of the electrode terminals 23, and the number of end parts of the first flow channels 310 of the first heat dissipation structure 300, which need to be connected with a supply port and a return port of the fluid, is reduced for assembly.

In some embodiments, the first heat dissipation structure 300 includes a heat conductive pipe 31, and a first flow channel 310 is formed inside the heat conductive pipe 31. The electrode terminals 23 are plural; the first flow channels 310 on the peripheral side of at least two electrode terminals 23 are connected in series, and the heat transfer pipes 31 on the peripheral side of at least two electrode terminals 23 are arranged in series.

Referring to fig. 8 and 9, in some embodiments, the electrode terminals 23 are plural; the first flow passages 310 on the peripheral side of at least two electrode terminals 23 communicate in parallel.

The first flow channels 310 on the peripheral side of at least two electrode terminals 23 are connected in parallel, which means that at least two corresponding first flow channels 310 of the electrode terminals 23 are connected in parallel among the first flow channels 310 around all the electrode terminals 23.

The first flow channels 310 on the peripheral sides of at least two electrode terminals 23 are connected in parallel, so that fluid can flow through the first flow channels 310 of the electrode terminals 23 respectively, and the influence of heat generated by each electrode terminal 23 on other battery cells 200 is reduced, so that the heat dissipation efficiency is improved.

In some embodiments, the first heat dissipation structure 300 includes a heat conductive pipe 31, and a first flow channel 310 is formed inside the heat conductive pipe 31. The electrode terminals 23 are plural; the first flow passages 310 on the peripheral sides of the at least two electrode terminals 23 are connected in parallel, and the heat transfer pipes 31 on the peripheral sides of the at least two electrode terminals 23 are arranged in parallel.

Referring to fig. 5, 6 and 13-15, in some embodiments, the battery 1001 includes at least one group of battery cells 200, and the first flow channels 310 on the electrode terminals 23 corresponding to the at least one group of battery cells 200 are connected in series.

A group of battery cells 200 may include one or more battery cells 200. Providing a plurality of sets of battery cells 200 can increase the capacity of the battery 1001. And the battery cells 200 are arranged in groups to facilitate assembly.

The first flow channels 310 on the electrode terminals 23 corresponding to the same group of battery cells 200 are connected in series, which means that the first flow channels 310 on the electrode terminals 23 of the same group of battery cells 200 are connected in series.

The first flow channels 310 on the circumferential side of the electrode terminals 23 of at least one group of the battery cells 200 are sequentially connected to form a series structure, and the number of end portions of the heat conductive pipe 31 that need to be connected to the supply port and the return port of the fluid can be reduced for assembly.

In some embodiments, referring to fig. 13, corresponding first flow channels 310 of multiple sets of cells 200 may be connected in series to reduce the number of ends of the heat pipe 31 that need to be connected to the supply and return ports of the fluid for assembly.

In some embodiments, the first heat dissipation structure 300 includes a heat conductive pipe 31, and a first flow channel 310 is formed inside the heat conductive pipe 31. The first flow channels 310 on the electrode terminals 23 corresponding to at least one group of the battery cells 200 are connected in series, so that the heat pipes 31 on the electrode terminals 23 corresponding to at least one group of the battery cells 200 are wound by the same pipe fitting, that is, one heat pipe 31 is wound on each electrode terminal 23 of at least one group of the battery cells 200, the heat pipes 31 can be conveniently wound on each electrode terminal 23, and the heat pipes 31 can be connected in series. As shown in fig. 5, 14 and 15, the heat pipes 31 corresponding to the electrode terminals 23 corresponding to the same group of battery cells 200 may be wound with one heat pipe 31. Alternatively, as shown in fig. 13, the corresponding heat pipes 31 of the plurality of groups of battery cells 200 may be wound with one heat pipe 31 to reduce the number of ends of the heat pipe 31 that need to be connected to the supply port and the return port of the fluid for assembly.

Referring to fig. 15, two electrode terminals 23 with opposite polarities are led out from the same side of the battery cell 200, and the structure can be used to wind the two electrode terminals 23 of the battery cell 200 by using the heat conducting tube 31, so as to dissipate heat of the two electrode terminals 23 of the battery cell 200.

Referring to fig. 16 and 19, two electrode terminals 23 with opposite polarities are respectively led out from opposite ends of the battery cell 200, and the heat pipe 31 can be wound around the two electrode terminals 23 of the battery cell 200, respectively, so as to dissipate heat from the two electrode terminals 23 of the battery cell 200, respectively.

Referring to fig. 5, 6, and 13-15, in some embodiments, the battery 1001 further includes: the second heat dissipation structure 400 is configured to dissipate heat from a side surface of the battery cell 200, and a second fluid channel 410 through which fluid flows is provided in the second heat dissipation structure 400; the first flow passage 310 communicates in parallel with the second flow passage 410.

The second heat dissipation structure 400 is a structure capable of cooling to perform cooling and heat dissipation. The second heat dissipation structure 400 is used for dissipating heat from a side surface of the battery cell 200, for example, the side surface of the battery cell 200 can be attached to the second heat dissipation structure 400, so that the heat dissipation of the battery cell 200 is performed by the second heat dissipation structure 400.

The second heat dissipation structure 400 is provided with a second flow channel 410 through which fluid flows, the second flow channel 410 refers to a channel structure arranged inside the second heat dissipation structure 400, and the fluid can flow in the second flow channel 410 so as to take away heat in the second heat dissipation structure 400 through the fluid flowing in the second flow channel 410, thereby realizing the functions of cooling and heat dissipation. The fluid may be a liquid; but may also be a gas such as a refrigerant or the like. In general, the fluid may be a liquid such as water or oil, which not only has good heat absorption performance, but also requires smaller pressure for flowing, and has lower strength requirement on the second heat dissipation structure 400, so that the cost for manufacturing the second heat dissipation structure 400 can be reduced.

Since the second flow channel 410 is a channel structure and needs to be in fluid communication, the second flow channel 410 has two ends for fluid to enter and exit, the end for fluid to enter can be called an inlet end or an inlet end, the end for fluid to exit can be called an outlet end, and the fluid exiting the second flow channel 410 is often recovered, so the outlet end can also be called a return end.

Parallel communication of the first flow path 310 with the second flow path 410 means that the inlet end of the first flow path 310 is in communication with the inlet end of the second flow path 410 and the outlet end of the first flow path 310 is in communication with the outlet end of the second flow path 410.

The second heat dissipation structure 400 may use a heat conductive plate having the second flow channels 410 therein. Of course, the second heat dissipation structure 400 may also be made of a tube, and the second flow channel 410 is formed inside the tube.

The second heat dissipation structure 400 is provided to dissipate heat to the side of the battery cell 200 to improve the heat dissipation efficiency of the battery cell 200; the first fluid passage 310 is connected in parallel with the second fluid passage 410 to not only facilitate fluid supply but also reduce heat interaction between the first fluid passage 310 and the second fluid passage 410.

The first heat dissipation structure 300 includes a heat conduction pipe 31, a first flow channel 310 is formed inside the heat conduction pipe 31, the first flow channel 310 is connected in parallel with a second flow channel 410, and then the heat conduction pipe 31 is connected in parallel with the second flow channel 410.

In some embodiments, the battery 1001 includes at least one set of battery cells 200, and the second heat dissipation structure 400 is attached to a side of the at least one set of battery cells 200.

The second heat dissipation structure 400 is attached to the side surface of at least one group of battery cells 200, which means that the second heat dissipation structure 400 can be attached to the side surface of one group of battery cells 200 in the plurality of groups of battery cells 200 to dissipate heat of the group of battery cells 200; of course, the second heat dissipation structure 400 may also be attached to the sides of several groups of the battery cells 200 in the multiple groups of the battery cells 200 to dissipate heat of the several groups of the battery cells 200.

Attaching the second heat dissipation structure 400 to the side surface of at least one group of battery cells 200, and dissipating heat from the attached battery cells 200 through the second heat dissipation structure 400; particularly, when the second heat dissipation structure 400 is attached to the sides of the plurality of groups of battery cells 200, one second heat dissipation structure 400 can dissipate heat of the plurality of groups of battery cells 200, so as to reduce the number of the second heat dissipation structures 400 and facilitate assembly and use.

In some embodiments, the number of the second heat dissipation structures 400 is plural, and the plural second heat dissipation structures 400 are matched to cover plural groups of the battery cells 200.

Plural means two or more.

The plurality of second heat dissipation structures 400 are matched to cover the plurality of groups of battery cells 200, which means that one second heat dissipation structure 400 can cover one or more groups of battery cells 200 and is attached to the side surfaces of the battery cells 200; the plurality of second heat dissipation structures 400 may cover the plurality of battery cells 200 or all the battery cells 200 to be attached to the sides of the battery cells 200.

A plurality of second heat dissipation structures 400 are used to cover a plurality of groups of battery cells 200 in a matching manner so as to realize heat dissipation of all the battery cells 200 in the battery 1001; and the single second heat dissipation structure 400 can radiate heat only to a part of the battery cells 200 to improve heat dissipation efficiency.

In some embodiments, the battery 1001 includes a plurality of groups of battery cells 200, and two ends of the first flow channel 310 corresponding to the electrode terminals 23 of each group of battery cells 200 are connected to the inlet end and the outlet end of the second flow channel 410 of the adjacent second heat dissipation structure 400, respectively.

The two ends of the first flow channels 310 corresponding to the electrode terminals 23 of each group of battery cells 200 are respectively connected with the inlet end and the outlet end of the second flow channel 410 of the adjacent second heat dissipation structure 400, which means that the plurality of first flow channels 310 corresponding to the electrode terminals 23 of each group of battery cells 200 can be connected in series, and the two ends formed by connecting the first flow channels 310 in series are respectively connected with the two ends of the second flow channel 410 of the second heat dissipation structure 400 corresponding to the group of battery cells 200, i.e. the inlet end formed by connecting the first flow channels 310 in series is connected with the inlet end of the second flow channel 410 of the second heat dissipation structure 400 corresponding to the group of battery cells 200, and the outlet end formed by connecting the first flow channels 310 in series is connected with the outlet end of the second flow channel 410 of the second heat dissipation structure 400 corresponding to the group of battery cells 200; of course, it may also mean that both ends of the first flow channel 310 corresponding to each electrode terminal 23 are directly connected to both ends of the second flow channel 410 of the adjacent second heat dissipation structure 400, that is, the inlet end of the first flow channel 310 corresponding to each electrode terminal 23 is connected to the inlet end of the second flow channel 410 of the adjacent second heat dissipation structure 400, and the outlet end of the first flow channel 310 corresponding to each electrode terminal 23 is connected to the outlet end of the second flow channel 410 of the adjacent second heat dissipation structure 400.

The two ends of each first flow channel 310 are connected to the inlet and outlet of the adjacent second heat dissipation structure 400, so that the connection is facilitated, and the respective first flow channels 310 corresponding to the electrode terminals 23 of the plurality of groups of battery cells 200 can be supplied with fluid to enhance the heat dissipation effect.

The first heat dissipation structure 300 includes a heat conduction pipe 31, a first flow channel 310 is formed inside the heat conduction pipe 31, two ends of the first flow channel 310 corresponding to the electrode terminals 23 of each group of battery cells 200 are respectively connected with an inlet end and an outlet end of the second flow channel 410 of the adjacent second heat dissipation structure 400, and two ends of the heat conduction pipe 31 corresponding to the electrode terminals 23 of each group of battery cells 200 are respectively connected with the inlet end and the outlet end of the second flow channel 410 of the adjacent second heat dissipation structure 400.

In some embodiments, two ends of the first flow channel 310 are connected with connection pipes 33, respectively, and the two connection pipes 33 are used for connecting a supply port and a return port of the fluid, respectively.

The connection pipe 33 is a pipe for guiding the flow of fluid, such as a pipe made of aluminum, copper, heat conductive silica gel, or the like.

The two ends of the first flow path 310 are an inlet end and an outlet end of the first flow path 310, and the inlet end and the outlet end of the first flow path 310 are connected with the connection pipe 33, respectively. Two connection pipes 33 are used to connect the supply port and the return port of the fluid, respectively, meaning that the connection pipe 33 connected to the inlet end of the first flow channel 310 is connected to the supply port of the fluid to guide the fluid of the supply port into the first flow channel 310; a connection pipe 33 connected to the outlet end of the first flow path 310 is connected to the return port of the fluid to guide the fluid of the first flow path 310 to the return port.

Connecting pipes 33 are respectively provided at both ends of the first flow path 310 to facilitate connection of a supply port and a return port of the fluid so that the fluid can enter and exit the first flow path 310.

In some embodiments, the connection pipe 33 may have the same structure as the heat conduction pipe 31. In some embodiments, the connection pipe 33 may also use a different structure from the heat conduction pipe 31.

In some embodiments, the connection pipes 33 may be respectively led out at both ends of the second flow path 410 of the second heat dissipation structure 400 so as to be connected to the first flow path 310. This construction facilitates connection and assembly.

In some embodiments, at least the outer circumferential surface of the connection tube 33 has an insulating property.

The outer circumferential surface of the connection pipe 33 means the outer surface of the connection pipe 33. Insulation properties refer to the property of being insulating and non-conductive.

The outer peripheral surface of the connection pipe 33 has an insulating property, and can perform a good insulating function to a certain extent, thereby reducing the risk of short circuit.

The outer surface of the connection pipe 33 may be provided with an insulating layer to achieve an insulating property of the outer surface of the connection pipe 33. The insulating layer refers to a film layer made of an insulating material. Of course, the connection pipe 33 may be made of an insulating material, or may have an insulating property on its outer surface.

In some embodiments, at least the outer peripheral surface of the connecting tube 33 has fire resistant properties.

At least the outer peripheral surface of the connection pipe 33 has a fire-resistant property, and when the heat generation of the battery cell 200 is large, a certain fire-resistant effect can be achieved, and the risk of the ignition of the battery 1001 can be reduced.

The outer surface of the connection pipe 33 may be provided with a refractory layer to achieve the refractory properties of the outer surface of the connection pipe 33. The insulating layer refers to a film layer made of a refractory material. Of course, the connection pipe 33 may be made of a refractory material, or may have a refractory property on its outer surface.

In some embodiments, the outer surface of the connection tube 33 may be provided with a coating layer, which may be made of materials such as fluororubber, PPO (Polyphenylene Oxide ), PPS (polyphenylene sulfide-containing thermoplastic engineering plastics on the molecular main chain, polyether plastics), PSF (polysulfonamide, polysulfone), polyaryl (polyarylene sulfone), PE, PP, PVC (Polyvinyl chloride ), ABS (Acrylonitrile Butadiene Styrene, refer to acrylonitrile-butadiene-styrene copolymer), PA (Polyamide, commonly called nylon), POM (Polyoxymethylene resin), PBT (polybutylene terephthalate ), PC (Polycarbonate), PA46 (polybutylene amide, commonly called nylon 46, PA 46), PPA (polyphenylamide, polyamide-polyether-Polyamide), PARA (aromafic polyamides, polyaramide), PEEK (Polyetheretherketone), etc., so that the outer surface of the connection tube 33 has fire-resistant and insulating properties.

In some embodiments, the connection tube 33 may be made of a material such as fluororubber, PPO, PPS, PSF, polyarylate, polyarylsulfone, PE, PP, PVC, ABS, PA, POM, PBT, PC, PA, PPA, PARA, PEEK, etc., to provide the connection tube 33 with fire resistant and insulating properties.

In some embodiments, referring to fig. 16, the number of the second heat dissipation structures 400 is plural, and the second heat dissipation structures 400 are respectively disposed on two opposite sides of the battery cell 200, so that the heat dissipation efficiency of the battery cell 200 can be improved by dissipating the heat from the two opposite sides of the battery cell 200 through the second heat dissipation structures 400.

In some embodiments, referring to fig. 17 to 19, the side surface of the battery cell 200 in the thickness direction is provided with a second heat dissipation structure 400. Since the area of the side surface of the battery cell 200 in the thickness direction is defined by the length and the width of the battery cell 200, the area is larger than the area of the other surfaces of the battery cell 200, and the second heat dissipation structure 400 is disposed on the side surface of the battery cell 200 in the thickness direction, the contact area between the second heat dissipation structure 400 and the battery cell 200 can be larger, so that the heat dissipation efficiency of the battery cell 200 is improved.

In some embodiments, referring to fig. 17, a second heat dissipation structure 400 is disposed between two adjacent battery cells 200, so as to cool and dissipate heat of the two battery cells 200 through the second heat dissipation structure 400, and improve the utilization efficiency of the second heat dissipation structure 400.

In some embodiments, referring to fig. 18, the second heat dissipation structure 400 is disposed on a side surface of the battery cell 200 in the thickness direction, and two opposite ends of the second heat dissipation structure 400 are respectively provided with an inlet end and a return end. Two electrode terminals 23 with opposite polarities are arranged on the same side of the battery cell 200, a heat conduction pipe 31 is wound on the two electrode terminals 23 of the battery cell 200, and two ends of the heat conduction pipe 31 are respectively connected with an inlet end and a reflux end of the second heat dissipation structure 400, so that the second flow passage of the second heat dissipation structure 400 is connected with the first flow passage 310 on the battery cell 200 on the side face in parallel, and the heat dissipation efficiency of the battery cell 200 and the upper electrode terminal 23 thereof is improved.

In some embodiments, referring to fig. 19, a plurality of battery cells 200 are provided, and electrode terminals 23 are respectively provided at opposite ends of a portion of the battery cells 200. Two electrode terminals 23 having opposite polarities are drawn out from the same side of a part of the battery cells 200. In some embodiments, when the battery cells 200 are provided in plurality, each battery cell 200 may be a battery cell 200 having electrode terminals 23 provided at opposite ends, respectively. In some embodiments, when the battery cells 200 are provided in plurality, each battery cell 200 may be a battery cell 200 having electrode terminals 23 provided at opposite ends, respectively.

According to some embodiments of the present application, the present application provides a battery 1001, including a battery cell 200 and a first heat dissipation structure 300, an electrode terminal 23 is disposed on the battery cell 200, the first heat dissipation structure 300 includes a heat conduction pipe 31, a first flow channel 310 is formed inside the heat conduction pipe 31, and the heat conduction pipe 31 is disposed around the electrode terminal 23, so that the first flow channel 310 is disposed around the electrode terminal 23. The heat pipe 31 includes a hose. Through setting up first heat radiation structure 300 to with the first runner 310 in the first heat radiation structure 300 around the electrode terminal 23 of battery cell 200, with the quick heat dissipation of electrode terminal 23, radiating efficiency is high, and simple structure, the preparation is convenient. The heat conduction pipe 31 is convenient to manufacture and surround the electrode terminal 23 to radiate heat of the electrode terminal 23, has a simple structure and convenient manufacture, and can be flexibly arranged according to the type and the size of the battery cell 200. The heat conductive pipe 31 is a flexible pipe, and can be wound on the electrode terminal 23 conveniently, so that the layout is convenient.

According to some embodiments of the present application, there is also provided an electrical device comprising a battery 1001 according to any of the above aspects.

The powered device may be any of the devices or systems previously described that employ the battery 1001.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery, comprising:

the battery unit is provided with an electrode terminal;

2. The battery of claim 1, wherein the first heat dissipation structure comprises a heat pipe, an interior of the heat pipe forming the first flow channel, the heat pipe disposed around the electrode terminal.

3. The battery of claim 2, wherein the thermally conductive tube comprises a rigid tube; and/or the heat conducting pipe comprises a hose.

4. The battery of claim 2, wherein the thermally conductive tube comprises a first section surrounding the electrode terminal for at least one week.

5. The battery of claim 2, wherein the heat pipe includes a plurality of second segments fitted around a peripheral side of the electrode terminal.

6. The battery of claim 5, wherein said heat pipe further comprises an inlet section connecting inlet ends of a plurality of said second sections, said inlet section for connecting a fluid supply port and directing fluid from said supply port into each of said second sections; and/or, the heat conducting pipe further comprises a pipe section connected with the outlet ends of the second sections, and the pipe section is used for connecting a backflow port of fluid and guiding the fluid of each second section to the backflow port.

7. The battery of claim 5, wherein an inlet end of the second section is connected to an inlet tube for connecting to a supply port for fluid and directing fluid from the supply port into the second section; and/or the outlet end of the second section is connected with an outlet pipe, and the outlet pipe is used for connecting a backflow port of fluid and guiding the fluid of the second section to the backflow port.

8. The battery according to any one of claims 2 to 7, wherein a plurality of the electrode terminals are provided, and the heat conduction pipes on the peripheral sides of at least two of the electrode terminals are wound with the same pipe member.

9. The battery according to any one of claims 2 to 7, wherein the heat conduction pipes on the peripheral side of the electrode terminals on the same battery cell are wound with the same pipe member.

10. The battery according to any one of claims 2 to 7, wherein the number of the electrode terminals is plural, the heat conduction pipe on the peripheral side of at least one of the electrode terminals is wound with a single pipe member, and both ends of the heat conduction pipe are connected with an inlet pipe and an outlet pipe, respectively; the inlet pipe is used for being connected with a fluid supply port, and the outlet pipe is used for being connected with a fluid return port.

11. The battery according to any one of claims 2-7, wherein the battery comprises at least one group of the battery cells, and the heat conduction pipes on the electrode terminals corresponding to at least one group of the battery cells are wound by the same pipe fitting.

12. The battery according to any one of claims 2 to 7, wherein at least an outer peripheral surface of the heat conductive pipe has an insulating property; and/or, at least the outer peripheral surface of the heat conduction pipe has a fire-resistant property.

13. The battery according to any one of claims 1 to 7, wherein the electrode terminals are plural;

the first flow passages on the peripheral sides of at least two of the electrode terminals are in series communication; and/or the first flow passages on the peripheral sides of at least two of the electrode terminals are communicated in parallel.

14. The battery of any one of claims 1-7, wherein the battery comprises at least one set of the battery cells, the first flow channels on the electrode terminals corresponding to at least the same set of the battery cells being in series communication.

15. The battery of any of claims 1-7, wherein the battery further comprises:

16. The battery of claim 15, wherein the battery comprises at least one set of the battery cells, and wherein the second heat dissipation structure is attached to a side of the at least one set of the battery cells.

17. The battery of claim 16, wherein the number of the second heat dissipation structures is plural, and the plural second heat dissipation structures cooperatively cover plural groups of the battery cells.

18. The battery of claim 17, wherein the battery comprises:

and the two ends of the first flow channel corresponding to the electrode terminals of each group of the battery cells are respectively connected with the inlet end and the outlet end of the second flow channel of the adjacent second heat dissipation structure.

19. The battery according to any one of claims 1 to 7, wherein both ends of the first flow path are connected with connection pipes, respectively, and both the connection pipes are used for connecting a supply port and a return port of a fluid, respectively.

20. An electrical device comprising a battery as claimed in any one of claims 1 to 19.