CN219873777U - Battery and electricity utilization device - Google Patents

Abstract

The embodiment of the utility model provides a battery and an electricity utilization device, and belongs to the technical field of batteries. The battery comprises at least two battery monomers and a connecting pipeline, wherein each battery monomer comprises a shell with an accommodating space; the connecting pipeline is arranged between the at least two battery monomers and communicates the accommodating spaces of the at least two battery monomers. The battery and the power utilization device provided by the embodiment of the utility model aim to improve the stability and reliability of the battery.

Description

Battery and electricity utilization device

Technical Field

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

Background

Batteries are widely used in electronic devices such as electric vehicles, electric automobiles, electric airplanes, electric ships, electric tools, and the like.

In addition to improving the performance of batteries, reliability in use of batteries is also a problem to be considered in the development of battery technology.

Therefore, how to improve the reliability of the battery during use is a problem to be solved in battery technology.

Disclosure of Invention

The utility model aims to provide a battery and electric equipment with better stability and reliability.

The utility model is realized by the following technical scheme:

In a first aspect, an embodiment of the present application provides a battery, including at least two battery units and a connection pipe, where each battery unit includes a housing having an accommodating space; the connecting pipeline is arranged between the at least two battery monomers and communicates the accommodating spaces of the at least two battery monomers.

According to the battery provided by the embodiment of the application, the connecting pipeline is arranged between at least two battery monomers, and the containing spaces of the at least two battery monomers are communicated by utilizing the connecting pipeline, so that the containing spaces between the at least two battery monomers are communicated, the gas environments among different battery monomers are kept the same, the consistency of the gas environments among different battery monomers is improved, the risk of thermal runaway of the single battery monomer due to extreme change of the gas environments is reduced, and the stability and reliability of the battery are improved.

According to one embodiment of the first aspect of the application, the connecting conduit comprises a first section and at least two second sections, wherein the first section has a first channel; at least two second sections are connected with the first section and are provided with second channels, the number of the second sections is the same as that of the battery cells, and the second channels are communicated with the first channels and the accommodating space of one battery cell.

According to the battery provided by the embodiment of the application, the connecting pipeline comprises the first section and at least two second sections, so that the first section is used as the main pipeline of the connecting pipeline, and the second section is used as the branch pipeline for connecting each battery unit, so that the number of the connecting pipelines and the number of the holes on each battery unit can be reduced, the production and assembly efficiency of the battery is improved, and the reliability is better.

According to an embodiment of the first aspect of the application, the number of second segments is two, the two second segments being arranged at both ends of the first segment, respectively.

According to the battery provided by the embodiment of the application, the number of the second sections is two, and the two second sections are respectively arranged at the two ends of the first section, namely, the connecting pipeline is arranged to be used for communicating the accommodating spaces of the two battery monomers, so that the arrangement mode is beneficial to mass production of the connecting pipeline, and the battery can adapt to batteries with different battery monomers, the application range is wider, the maintenance and the replacement are facilitated, and the reliability is better.

According to an embodiment of the first aspect of the present application, the number of the connection pipes is plural, and the accommodation space of the battery cell communicates with the accommodation spaces of the other battery cells through at least one connection pipe.

According to the battery provided by the embodiment of the application, the accommodating space of the battery unit is communicated with the accommodating spaces of other battery units through the at least one connecting pipeline, namely, the number of the connecting pipelines is multiple, the shape of the connecting pipeline can be designed according to the arrangement condition of the battery unit in the box body of the battery, the application range is wider, and the reliability is better.

According to an embodiment of the first aspect of the application, the connecting duct is arranged between adjacent battery cells.

According to the battery provided by the embodiment of the application, the connecting pipelines are arranged between the adjacent battery monomers, so that the size of the connecting pipelines can be designed according to the distance between the adjacent battery monomers, the mass production of the connecting pipelines is more facilitated, the production and assembly efficiency of the battery is improved, and the reliability is better.

According to an embodiment of the first aspect of the application, the second section comprises a body portion and a sealing piece, wherein the body portion is connected with the first section; the sealing piece is connected to one end of the body part, which is far away from the first section, and is connected with the shell, and the second channel penetrates through the body part and the sealing piece.

According to the battery provided by the embodiment of the application, the second section comprises the body part and the sealing piece, and the sealing piece is connected to one end of the body part, which is far away from the first section, and is connected with the shell, so that when the connecting pipeline is welded with the battery monomer, the sealing piece can be utilized to realize the welding with the battery monomer, the welding area is increased, and the welding reliability is further improved; meanwhile, the risk that welding slag generated during welding of the connecting pipeline falls into the battery monomer through the second channel is reduced, the cleanliness of the internal space of the battery monomer is improved, and the reliability is better.

According to an embodiment of the first aspect of the application, the first section is an elastic tube and the second section is a rigid tube.

According to the battery provided by the embodiment of the application, the first section is the elastic tube, and the second section is the rigid tube, so that the connecting pipeline has certain expansion performance, further, the risk of cracking of the connecting pipeline due to overlarge pressure caused by excessive gas generated by a certain battery monomer in the circulation process can be reduced, the service life of the connecting pipeline is prolonged, and the reliability is better.

According to an embodiment of the first aspect of the application, the housing is provided with a communication hole through which the connection pipe communicates with the accommodation space.

According to the battery provided by the embodiment of the application, the communication hole is arranged on the shell so as to provide positioning for the installation of the connecting pipeline by utilizing the communication hole, so that the assembly efficiency of the connecting pipeline can be improved, the production efficiency of the battery is further improved, and the economy is better.

According to an embodiment of the first aspect of the present application, the housing includes an end cap and a case, the end cap is connected to the case to form the accommodation space, and the communication hole is provided at the end cap.

According to the battery provided by the embodiment of the application, the communication hole is arranged on the end cover so as to fully utilize the spare space in the battery box, reduce the occupation of the connecting pipeline to the space in the box, further improve the volume energy density of the battery and improve the reliability.

According to an embodiment of the first aspect of the present application, the communication hole is a liquid filling hole.

According to the battery provided by the embodiment of the application, the communication holes are arranged as the liquid injection holes, so that the arrangement of the communication holes can be reduced, the number of components on the battery monomer is reduced, the production process of the battery monomer is simplified, the production efficiency of the battery monomer is improved, and the economy and the reliability of the battery are improved.

According to an embodiment of the first aspect of the present application, the housing further includes a seal member, at least a portion of which is provided at a wall of the communication hole to form a through hole through which the connection pipe communicates with the accommodation space.

According to the battery provided by the embodiment of the application, at least part of the sealing element is arranged on the hole wall of the communication hole to form the through hole, and the connecting pipeline is connected with the accommodating space through the through hole, so that the sealing performance of each battery monomer can be further improved by using the sealing element, the inner space of each battery monomer is kept stable and sealed, the risk of thermal runaway and even explosion of each battery monomer is reduced, and the reliability is better.

According to an embodiment of the first aspect of the present application, the battery pack further includes a case in which the battery cells are accommodated.

According to the battery provided by the embodiment of the application, the battery further comprises the box body, and the battery monomer is accommodated in the box body, so that external protection is further provided for the battery monomer, and the circulation stability and reliability of the battery monomer are improved.

In a second aspect, an embodiment of the present application further provides an electrical device, including a battery according to any one of the embodiments of the first aspect of the present application, where the battery is used to provide electrical energy.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

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

FIG. 1 is a schematic view of a partial structure of a vehicle according to an embodiment of the present application;

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

FIG. 3 is an isometric view of a portion of the structure of a battery provided in an embodiment of the application;

fig. 4 is an enlarged view of a portion a of the battery shown in fig. 3;

FIG. 5 is a cross-sectional view of the battery shown in FIG. 3 taken along line B-B;

fig. 6 is an enlarged view of part C of the battery shown in fig. 5;

fig. 7 is a schematic structural view of a connecting pipe in a battery according to an embodiment of the present application;

fig. 8 is a schematic diagram of a connection structure between a connection pipe and a plurality of battery cells in a battery according to an embodiment of the application;

fig. 9 is a schematic structural view of a connecting pipe in a battery according to another embodiment of the present application;

fig. 10 is a schematic diagram of a connection structure between a connection pipe and a plurality of battery cells in a battery according to another embodiment of the application.

Icon: 1-a vehicle; 1 a-motor; 1 b-a controller; 100-cell; 10-battery cell; 11-a housing; 111-end caps; 112-a housing; 113-a seal; 20-connecting pipelines; 21-a first stage; 211-first channel; 22-a second section; 221-a second channel; 222-a body portion; 223-sealing plate; 30-a box body; 101-an accommodation space; 102-a communication hole; 103-a through hole; 200-electrode assembly; x-first direction.

Detailed Description

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

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

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

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

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

The term "plurality" as used herein means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the present application, the battery cell may include, but is not limited to, a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a lithium sodium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell. The shape of the battery cell may include, but is not limited to, a cylinder, a flat body, a rectangular parallelepiped. The battery cells are generally classified into three types according to the packaging method: cylindrical battery cells, square battery cells and soft package battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive lug protruding out of the positive current collecting part, wherein the positive current collecting part is coated with a positive active material layer, and at least part of the positive lug is not coated with the positive active material layer. Taking a lithium ion battery monomer as an example, the material of the positive electrode current collector can be aluminum, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode current collecting part and a negative electrode tab protruding from the negative electrode current collecting part, wherein the negative electrode current collecting part is coated with a negative electrode active material layer, and at least part of the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. In order to improve the excessive flow of the lugs, the number of the positive lugs is multiple and the positive lugs are stacked together, and the number of the negative lugs is multiple and the negative lugs are stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be, but is not limited to, a roll-to-roll structure and a lamination structure.

The battery cell may further include a case having an accommodating space inside the case, the accommodating space being a closed space provided by the case for the electrode assembly and the electrolyte. The shell comprises a shell body and an end cover, wherein the shell body is of a hollow structure with one side open, the end cover comprises a body part, and the body part covers the opening of the shell body and forms sealing connection so as to form a containing space for containing the electrode assembly and electrolyte.

In the related art, a battery generally includes a case and a plurality of battery cells, and the plurality of battery cells are electrically connected through a tab to provide electric energy for an electric device. Besides electrical connection, the accommodating spaces surrounded by the outer shells of the battery cells are often mutually independent so as to provide a stable and sealed working environment for the electrode assembly.

However, in the related art, the relative independent arrangement manner of each battery monomer makes the consistency between each battery monomer worse, that is, if a single battery monomer fails, the pressure inside the battery monomer may be increased sharply, so that the battery monomer may be out of control or even be exploded, thereby causing the failure of the battery and the poor reliability of the battery.

In view of this, the present application provides a technical solution in which a battery includes at least two battery cells and a connection pipe, wherein the battery cells include a housing having an accommodation space; the connecting pipeline is arranged between the at least two battery monomers and communicates the accommodating spaces of the at least two battery monomers. The battery with the structure can improve the consistency of the gas environment inside each battery cell through the connecting pipeline, and when the inside of each single battery cell is boosted, the pressure can be released to other battery cells through the connecting pipeline so as to utilize all battery cells in the battery to jointly resist the risk of boosting, thereby reducing the probability of thermal runaway of each single battery cell and having better reliability.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case can reduce the influence of liquid or other foreign matters on the charge or discharge of the battery cells.

The technical scheme disclosed by the application is suitable for a battery module, a battery comprising the battery module and an electric device using the battery.

The devices to which the batteries described in the embodiments of the present application are applicable include, but are not limited to: battery cars, electric vehicles, ships, spacecraft, electric toys, electric tools, and the like, for example, spacecraft including airplanes, rockets, space planes, and spacecraft, and the like, electric toys including fixed or mobile electric toys, for example, game machines, electric vehicle toys, electric ship toys, and electric aircraft toys, and the like, and electric tools including metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planners.

For convenience of explanation, the following examples will be described taking an electric device as an example of a vehicle.

Fig. 1 is a schematic partial structure of a vehicle according to an embodiment of the present application.

As shown in fig. 1, a battery 100 is provided inside a vehicle 1. The battery 100 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 100 may be used for power supply of the vehicle 1, for example, the battery 100 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 100 to supply power to the motor 1a, for example, for operation power demand at the time of starting, navigation, and running of the vehicle 1.

In some embodiments of the application, battery 100 may not only serve as an operating power source for vehicle 1, but may also serve as a driving power source for vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1.

Fig. 2 is a schematic exploded view of a battery according to an embodiment of the present application.

As shown in fig. 2, the battery 100 includes a battery cell 10. The battery 100 may further include a case 30 for accommodating the battery cells 10.

In the battery 100, the number of the battery cells 10 may be one or more. If there are a plurality of battery cells 10, the plurality of battery cells 10 may be connected in series, parallel or series-parallel. Series-parallel connection refers to both series connection and parallel connection of the plurality of battery cells 10. The plurality of battery cells 10 can be directly connected in series or in parallel or in series-parallel, and then the whole body formed by the plurality of battery cells 10 is accommodated in the box 30, or the plurality of battery cells 10 can be connected in series or in parallel or in series-parallel to form a battery module. The plurality of battery modules are then connected in series, in parallel or in series-parallel to form a unit, and are accommodated in the case 30.

FIG. 3 is an isometric view of a portion of the structure of a battery provided in an embodiment of the application; fig. 4 is an enlarged view of a portion a of the battery shown in fig. 3; FIG. 5 is a cross-sectional view of the battery shown in FIG. 3 taken along line B-B; fig. 6 is an enlarged view of part C of the battery shown in fig. 5.

As shown in fig. 1 to 6, an embodiment of the present application proposes a battery 100 including at least two battery cells 10 and a connection pipe 20, wherein each battery cell 10 includes a housing 11 having an accommodation space 101; the connection duct 20 is disposed between at least two battery cells 10 and communicates the accommodation spaces 101 of the at least two battery cells 10.

The battery cells 10 are units for supplying or storing electric energy in the battery 100, and in these embodiments of the present application, the number of the battery cells 10 may be set to be plural so as to increase the electric energy reserve of the battery 100 by commonly charging or discharging the plurality of battery cells 10. Illustratively, in these embodiments of the application, a plurality of battery cells 10 may be provided for electrical connection through the tabs.

Each battery cell 10 includes a case 11 having a receiving space 101, which means that the case 11 of the battery cell 10 has the receiving space 101, and the receiving space 101 may be isolated from the external environment by the case 11, so that the electrode assembly 200 of the battery cell 10 can stably circulate within the receiving space 101 to achieve the charge or discharge of the battery cell 10.

In some embodiments, the shell 11 may include an end cover 111 and a shell 112, where the end cover 111 and the shell 112 may be connected by a welded fixed connection manner, so as to jointly enclose the accommodating space 101. For example, the housing 11 may include an end cover 111 and a shell 112, where the shell 112 is a semi-enclosed structure having an opening, and the end cover 111 may cover the opening and be fixedly connected to the shell 112 to define the accommodating space 101; alternatively, in some embodiments, the housing 112 may be configured to have two openings at two ends, and in this case, the number of the end caps 111 may be two, and the two end caps 111 cover the two openings respectively, so as to jointly enclose the accommodating space 101.

The connection duct 20 serves to communicate the receiving spaces 101 of the different battery cells 10 to increase the uniformity of the internal gas environment among the plurality of battery cells 10. That is, the gas in one battery cell 10 may flow into another battery cell 10 through at least the connection pipe 20 so that the gas environments in the accommodation spaces 101 of the plurality of battery cells 10 are maintained uniform.

The connection pipe 20 is disposed between at least two battery cells 10, which means that the receiving space of each battery cell 10 is at least communicated with the receiving space 101 of another battery cell 10 through the connection pipe 20. Illustratively, the number of battery cells 10 may be, but is not limited to, five, ten, twenty, or fifty.

The connection pipe 20 is a hollow pipe, and an end portion of the connection pipe, which communicates with the receiving space 101 of the battery cell 10, is fixedly connected with the battery cell 10. Illustratively, in some embodiments, through holes communicating with the accommodating spaces 101 may be preset on the battery cells 10, and in the process of connecting the connecting pipe 20 with the battery cells 10, the outer pipe wall of the connecting pipe 20 may be provided to be connected with the hole wall of the through holes, or the end wall of the connecting pipe 20 may be provided to be connected with the battery cells 10 and cover the through holes, so that the accommodating spaces 101 of the plurality of battery cells 10 may be communicated through the connecting pipe 20 and isolated from the external environment.

The battery 100 adopts such a configuration that when the electrode assembly 200 inside the single battery cell 10 is shorted or insulated, the gas generated in the accommodating space 101 by the electrode assembly 200 can flow to other battery cells 10 through the connecting pipe 20 to balance the gas pressure in the accommodating space 101 of the battery cell 10, so as to dilute the pressure in the battery cell 10 by using the accommodating space 101 of the other battery cells 10, thereby achieving the purpose of reducing the internal pressure of the battery cell 10, reducing the risk of thermal runaway or explosion of the battery 100, and improving the reliability of the battery 100.

According to the battery 100 of the embodiment of the application, the connecting pipeline 20 is arranged between at least two battery monomers 10, and the accommodating spaces 101 of the at least two battery monomers 10 are communicated by utilizing the connecting pipeline 20, so that the accommodating spaces 101 between the at least two battery monomers 10 are communicated, the gas environments among different battery monomers 10 are kept the same, the consistency of the gas environments among different battery monomers 10 is improved, the risk of thermal runaway of the single battery monomer 10 due to extreme change of the gas environment is reduced, and the stability and reliability of the battery 100 are improved.

Fig. 7 is a schematic structural view of a connecting pipe in a battery according to an embodiment of the present application; fig. 8 is a schematic diagram of a connection structure between a connection pipe and a plurality of battery cells in a battery according to an embodiment of the application; fig. 9 is a schematic structural view of a connecting pipe in a battery according to another embodiment of the present application; fig. 10 is a schematic diagram of a connection structure between a connection pipe and a plurality of battery cells in a battery according to another embodiment of the application.

As shown in fig. 1 to 10, according to an embodiment of the first aspect of the present application, the connecting pipe 20 comprises a first section 21 and at least two second sections 22, wherein the first section 21 has a first channel 211; at least two second sections 22 are connected to the first section 21 and have second passages 221, the number of the second sections 22 is the same as that of the battery cells 10, and the second passages 221 communicate the first passages 211 with the accommodation space 101 of one battery cell 10.

The first section 21 is a main pipe portion of the connecting pipe 20, that is, the accommodating space 101 of each battery cell 10 may be in communication with the first section 21 to realize exchange of gas in the accommodating space 101. In these embodiments of the present application, the first section 21 may be disposed along the arrangement direction of the battery cells 10, and in some embodiments, the plurality of battery cells 10 may be disposed along the first direction X, for example, the first section 21 may be disposed along the first direction X, where the first direction X may be a straight line direction or a curved line direction.

The second sections 22 are branch pipe portions of the connection pipe 20, which function to communicate the first sections 21 with the accommodation spaces 101 of the respective battery cells 10, and thus, the same number of the second sections 22 as the number of the battery cells 10 can be provided. In these embodiments of the present application, the second section 22 is disposed near the battery cell 10, and a second section 22 is disposed corresponding to a battery cell 10.

The number of the second segments 22 is at least two, meaning that the number of the second segments 22 is plural, and the number of the second segments 22 is the same as the number of the battery cells 10, and in these embodiments of the present application, since the number of the battery cells 10 is at least two, the number of the second segments 22 may be set to be at least two.

The first section 21 has a first channel 211, and the first channel 211 is a space isolated from the outside for exchanging the gas environment between the accommodating spaces 101 of the plurality of battery cells 10. Wherein the cross-sectional shape of the first segment 21 may be, but is not limited to, rectangular, circular, oval or triangular.

Each second section 22 is connected to the first section 21, and in a possible implementation manner, the second section 22 and the first section 21 may be fixedly connected by welding, bonding or the like; in some embodiments, a detachable connection manner such as threaded connection or clamping connection may be adopted between the second section 22 and the first section 21, and it should be noted that in embodiments in which a detachable connection manner is adopted between the second section 22 and the first section 21, after the second section 22 is detached, other components need to be installed on the first section 21, so that a hole on the first section 21 for communicating with the second section 22 is plugged, so as to improve the sealing performance of the connecting pipeline 20.

The second section 22 has a second channel 221, wherein the second channel 221 serves to communicate the first channel 211 with the receiving space 101 of each battery cell 10, and the second section 22 cooperates with the first section 21 for exchanging the gas atmosphere between the receiving spaces 101 of the plurality of battery cells 10. Accordingly, the cross-sectional shape of the second section 22 may also be, but is not limited to, rectangular, circular, oval, or triangular.

According to the battery 100 of the embodiment of the application, the connecting pipeline 20 comprises the first section 21 and at least two second sections 22, so that the first section 21 is used as a main pipeline of the connecting pipeline 20, and the second sections 22 are used as branch pipelines for connecting the battery cells 10, so that the number of the connecting pipelines 20 and the number of the openings on the battery cells 10 can be reduced, the production and assembly efficiency of the battery 100 is improved, and the reliability is better.

According to an embodiment of the first aspect of the present application, the number of the second sections 22 is two, and two second sections 22 are respectively provided at both ends of the first section 21.

The second sections 22 are respectively disposed at two ends of the first section 21, and in a possible embodiment, two through holes communicating with the first channel 211 are formed in the first section 21, and the two second sections 22 cover the two through holes and are connected to the first section 21.

In these embodiments of the present application, the arrangement length of the first section 21 may be determined according to the arrangement of the plurality of battery cells 10, and the second section 22 may be disposed at both ends of the first section 21, so that the connection length of the connection pipe 20 may be lengthened as much as possible to accommodate the battery 100 having a long interval between the battery cells 10.

The two second sections 22 are respectively disposed at two ends of the first section 21, and a possible manner of disposing is that the two second sections 22 are respectively connected with two ends of the first section 21, or that the two second sections 22 are integrally formed with the first section 21.

According to the battery 100 of the embodiment of the application, the number of the second sections 22 is two, and the two second sections 22 are respectively arranged at two ends of the first section 21, namely, the connecting pipeline 20 is arranged to be used for communicating the accommodating spaces 101 of the two battery monomers 10, so that the arrangement mode is beneficial to mass production of the connecting pipeline 20, and the battery 100 with different numbers of the battery monomers 10 can be adapted, the application range is wider, the maintenance and the replacement are facilitated, and the reliability is better.

According to an embodiment of the first aspect of the present application, the number of the connection pipes 20 is plural, and the accommodation spaces 101 of the battery cells 10 communicate with the accommodation spaces 101 of the other battery cells 10 through at least one connection pipe 20.

In these embodiments of the present application, the connecting pipes 20 may be miniaturized and the number of connecting pipes 20 may be multiple, so that the difficulty in assembling and positioning the connecting pipes 20 may be reduced, and a single connecting pipe 20 is only responsible for connecting the accommodating spaces 101 of two battery cells 10, and the number of the connecting pipes 20 may be increased or decreased to adapt to the batteries 100 with different numbers of battery cells 10, thereby having a wider application range.

The accommodating space 101 of the battery cell 10 communicates with the accommodating spaces 101 of the other battery cells 10 through at least one connection pipe 20, which means that among the plurality of battery cells 10, the accommodating spaces 101 of two battery cells 10 located at both ends of the arrangement direction of the plurality of battery cells 10 may communicate with the accommodating space 101 of an adjacent one of the battery cells 10 through only one connection pipe 20, while the accommodating spaces 101 of the plurality of battery cells 10 located at the middle part of the arrangement direction all need to communicate with the accommodating spaces 101 of the other two battery cells 10 through at least two connection pipes 20.

In these embodiments of the present application, the length dimension of the single connecting pipe 20 (the dimension of the interval between the two second sections 22) can be designed according to the interval between the battery cells 10, and the cross-sectional shape of the connecting pipe 20 can be selected according to the type of the battery cells 10, so that the application range is wider and the reliability is better.

According to the battery 100 of the embodiment of the application, the accommodating space 101 of the battery cell 10 is communicated with the accommodating spaces 101 of other battery cells 10 through at least one connecting pipeline 20, that is, the number of the connecting pipelines 20 is multiple, so that the shape of the connecting pipeline 20 can be designed according to the arrangement condition of the battery cells 10 in the box body of the battery 100, the application range is wider, and the reliability is better.

According to one embodiment of the first aspect of the present application, the connection duct 20 is disposed between the adjacent battery cells 10.

In these embodiments of the present application, the connecting pipes 20 are disposed between adjacent battery cells 10, so that the length of the connecting pipes 20 between the battery cells 10 can be shortened, the difficulty in positioning the connecting pipes 20 can be further reduced, and the risk of interference of the connecting pipes 20 with other components in the battery 100 can be reduced.

The arrangement is beneficial to miniaturization of the connecting pipeline 20, space occupation of the connecting pipeline 20 to the box body 30 of the battery 100 can be reduced while mass production can be realized, volume energy density of the battery 100 can be improved, and reliability is better.

According to the battery 100 of the embodiment of the application, the connecting pipelines 20 are arranged between the adjacent battery cells 10, so that the dimension of the connecting pipelines 20 can be designed according to the distance between the adjacent battery cells 10, mass production of the connecting pipelines 20 is more facilitated, the production and assembly efficiency of the battery 100 are improved, and the reliability is better.

According to one embodiment of the first aspect of the present application, the second section 22 comprises a body portion 222 and a sealing piece 223, wherein the body portion 222 is connected with the first section 21; the sealing piece 223 is connected to an end of the body portion 222 facing away from the first section 21 and is connected to the housing 11, and the second channel 221 penetrates the body portion 222 and the sealing piece 223.

The body portion 222 is a portion of the second section 22 connected to the first section 21, where the body portion 222 is connected to the first section 21, and in a possible embodiment, the body portion 222 and the first section 21 may be fixedly connected by, but not limited to, welding, adhesive, or the like.

The sealing piece 223 is used for improving the welding area of the second section 22 and the battery cell 10, and simultaneously, changing the welding position between the second section 22 and the battery cell 10 from the end part of the body part 222, which is away from the first section 21, to the sealing piece 223, so that the welding point between the second section 22 and the battery cell 10 can be far away from the body part 222, and the possibility that welding slag generated during welding falls into the inner space of the battery cell 10 along the second channel 221 is reduced, and the reliability of the battery 100 is further increased.

The sealing piece 223 is connected to an end of the body portion 222 facing away from the first section 21, and in a possible embodiment, the sealing piece 223 has a plate-like structure, and in a connection direction of the sealing piece 223 and the body portion 222, a cross-sectional area of the sealing piece 223 is larger than a cross-sectional area of the body portion 222, and an orthographic projection of a connection end of the body portion 222 and the sealing piece 223 to the sealing piece 223 falls completely in the sealing piece 223. In this way, in the welding process of the connecting pipe 20, the welding points can be disposed at the peripheral edges of the sealing piece 223 corresponding to the body portion 222, so that the welding points are disposed away from the body portion 222, thereby realizing the effect of reducing the welding slag falling into the battery cell 10 along the second channel 221, and improving the reliability.

The sealing piece 223 is connected with the shell 11, and in a possible implementation manner, the sealing piece 223 and the shell 11 can be connected by adopting a screw, a bolt and the like, and a sealing layer needs to be arranged between the sealing piece 223 and the shell 11 to increase the connection tightness between the connecting pipeline 20 and the shell 11; in some embodiments, a welded and fixed connection manner may be adopted between the sealing piece 223 and the housing 11, so as to further improve the connection tightness between the connecting pipeline 20 and the housing 11.

Illustratively, in some embodiments, the sealing piece 223 and the housing 11 may be connected by laser welding, so as to obtain higher welding energy, and improve the welding success rate and the sealing performance between the sealing piece 223 and the housing 11.

The second channel 221 penetrates the body portion 222 and the sealing piece 223, which means that the second channel 221 is disposed along the connection direction of the body portion 222 and the sealing piece 223, and penetrates the body portion 222 and the sealing piece 223, so that the first channel 211 can communicate with the accommodating space 101 through the second channel 221.

According to the battery 100 of the embodiment of the application, the second section 22 includes the body portion 222 and the sealing piece 223, and the sealing piece 223 is connected to one end of the body portion 222 away from the first section 21 and is connected with the housing 11, so that when the connecting pipe 20 is welded with the battery cell 10, the sealing piece 223 can be utilized to realize the welding with the battery cell 10, the welding area is increased, and the welding reliability is further improved; meanwhile, the risk that welding slag generated during welding of the connecting pipeline 20 enters the battery cell 10 through the second channel 221 is reduced, the cleanliness of the inner space of the battery cell 10 is improved, and the reliability is better.

According to one embodiment of the first aspect of the application, the first section 21 is an elastic tube and the second section 22 is a rigid tube.

The first section 21 is an elastic tube, meaning that the tube wall of the first section 21 has elasticity, i.e. the tube wall of the first section 21 is capable of elastic deformation when subjected to excessive pressure. In this way, the reliability of the battery 100 in coping with the abrupt increase in the internal pressure of the single battery cell 10 can be improved, and when the internal pressure of the single battery cell 10 is abruptly increased, the first section 21 can absorb a large amount of pressure by undergoing elastic deformation, and after the internal pressure of the single battery cell 10 is transferred to other battery cells 10 through the connection pipe 20, the first section 21 can rebound to the normal state.

Illustratively, in some embodiments, the material of which the first section 21 is provided may be, but is not limited to, rubber or silicone.

The second section 22 is a rigid tube, and in a possible embodiment, the second section 22 is made of the same material as the housing 11, and an aluminum shell is used to facilitate the connection of the connecting pipe 20 with the housing 11 through the second section 22.

According to the battery 100 of the embodiment of the application, the first section 21 is an elastic tube, and the second section 22 is a rigid tube, so that the connecting pipeline 20 has a certain expansion property, and further the risk of breakage of the connecting pipeline 20 due to overlarge pressure caused by excessive gas generated by a certain battery cell 10 in the circulation process can be reduced, the service life of the connecting pipeline 20 is prolonged, and the reliability is better.

According to an embodiment of the first aspect of the present application, the housing 11 is provided with a communication hole 102, and the connection pipe 20 communicates with the accommodation space 101 through the communication hole 102.

The housing 11 is provided with a communication hole 102, which means that a through hole for communicating the accommodation space 101 with the outside is opened in the housing 11. In these embodiments of the present application, the communication holes 102 are pre-installation holes of the connection pipes 20, and each communication hole 102 needs to be plugged by the connection pipe 20 during the installation of the connection pipe 20 to form a sealed and stable environment of the accommodation space 101.

In these embodiments of the present application, the communication hole 102 may be provided on the end cover 111 and/or the housing 112, and may be selected according to the specific structure of the connection pipe 20.

The connection pipe 20 is communicated with the accommodating space 101 through the communication hole 102, namely, the second channel 221 in the connection pipe 20 is communicated with the accommodating space 101 through the communication hole 102, so that when the pressure in the accommodating space 101 increases, the pressure in the accommodating space 101 can flow to the accommodating spaces 101 of other battery cells 10 through the connection pipe 20, the whole pressure of the battery 100 is balanced, the consistency of the internal pressure among the battery cells 10 is maintained, and the risk of thermal runaway or explosion caused by overlarge internal pressure of the accommodating space 101 of the single battery cell 10 is further reduced.

According to the battery 100 of the embodiment of the application, the communication hole 102 is arranged on the housing 11 to provide positioning for the installation of the connecting pipe 20 by using the communication hole 102, so that the assembly efficiency of the connecting pipe 20 can be improved, the production efficiency of the battery 100 is improved, and the economy is better.

According to an embodiment of the first aspect of the present application, the housing 11 includes an end cap 111 and a shell 112, the end cap 111 is connected to the shell 112 to form the accommodating space 101, and the communication hole 102 is provided at the end cap 111.

The communication hole 102 is provided in the end cover 111, which means that the communication hole 102 is provided in the end cover 111, and in a possible embodiment, the communication hole 102 penetrates the end cover 111 along the thickness direction of the end cover 111. In this way, the flow of the electrolyte in the accommodation spaces 101 of the different battery cells 10 through the connection duct 20 can be reduced.

In these embodiments of the present application, since the electrode assembly 200 and the electrolyte are accommodated in the accommodating space 101, the electrode assembly 200 is soaked in the electrolyte, and the electrolyte is accumulated on the side of the case 11 close to the case 112 by gravity, so that the electrolyte is not provided in the accommodating space 101 corresponding to a space having a portion between the electrode assembly 200 and the end cap 111. In these embodiments of the present application, the communication hole 102 is provided to the end cap 111, that is, the space in the accommodating space 101 where the electrolyte is not provided is communicated by the communication hole 102, so that the connection pipe 20 serves to communicate the gas environments of the different battery cells 10, reducing the possibility of the electrolyte flowing between the different battery cells 10 through the connection pipe 20.

Meanwhile, the communication hole 102 is formed in the end cover 111, and the controllable connecting pipeline 20 is arranged at the installation position of the end cover 111, which is away from one end of the shell 112, so that the occupation of the space of the box body 30 is reduced, more battery cells 10 can be accommodated in the space of the box body 30, and the volume energy density of the battery 100 is improved.

According to the battery 100 of the embodiment of the application, the communication hole 102 is arranged on the end cover 111, so that the empty space in the box 30 of the battery 100 is fully utilized, the space occupation of the connecting pipeline 20 in the box 30 is reduced, the volume energy density of the battery 100 is further improved, and the reliability is better.

According to an embodiment of the first aspect of the present application, the communication hole 102 is a liquid filling hole.

The communication hole 102 is a filling hole, and means a step of opening the communication hole 102 without providing any additional hole in the production process of the battery cell 10. In this way, in the production process of the battery 100, after the electrolyte is injected into the accommodating space 101 through the liquid injection hole of each battery cell 10, the communicating hole 102 serving as the liquid injection hole is sealed by welding the connecting pipe 20 and the casing 11, so that the accommodating spaces 101 of the battery cells 10 are mutually communicated, and the uniformity of the gas environment in the accommodating spaces 101 of the battery cells 10 is increased.

According to the battery 100 of the embodiment of the application, the communication hole 102 is arranged as the liquid injection hole, so that the arrangement of the communication hole 102 can be reduced, the number of components on the battery cell 10 is reduced, the production process of the battery cell 10 is simplified, the production efficiency of the battery cell 10 is improved, and the economy and the reliability of the battery 100 are improved.

According to an embodiment of the first aspect of the present application, the housing 11 further includes a sealing member 113, at least part of the sealing member 113 being disposed at a wall of the communication hole 102 to form a through hole 103, and the connection pipe 20 communicates with the accommodation space 101 through the through hole 103.

The sealing member 113 functions to enhance sealing performance of the connection position of the communication hole 102 and the connection pipe 20. In these embodiments of the present application, the sealing member 113 may be regarded as a sealing nail of the relevant battery cell 10, and the through-holes 103 are provided in the sealing nail.

At least part of the sealing member 113 is provided on the wall of the communication hole 102 to form a through hole 103, meaning that the through hole 103 functions similarly to the communication hole 102, and serves to communicate the accommodation space 101 with the inner space of the connection pipe 20.

Illustratively, in an embodiment in which the communication hole 102 is a circular hole, at least a portion of the sealing member 113 may be disposed at a wall of the communication hole 102 to form the through hole 103 coaxial with the communication hole 102.

According to the battery 100 of the embodiment of the application, at least part of the sealing member 113 is arranged on the hole wall of the communication hole 102 to form the through hole 103, and the connecting pipeline 20 is connected with the accommodating space 101 through the through hole 103, so that the sealing performance of each battery cell 10 can be further improved by using the sealing member 113, the inner space of each battery cell 10 is kept stable and sealed, the risk of thermal runaway or even explosion of each battery cell 10 is reduced, and the reliability is better.

According to an embodiment of the first aspect of the present application, the battery pack further includes a case 30, and the battery cell 10 is accommodated in the case 30.

The case 30 is an outer envelope of the plurality of battery cells 10 so that the working environments of the plurality of battery cells 10 remain relatively stable and sealed.

The shape of the case 30 may be matched with the shape of the battery cell 10, and for example, when the shape of the battery cell 10 is a rectangular body, the shape of the case 30 may be set to be a rectangular body; when the battery cell 10 is in the shape of a cylinder, the case 30 may be provided in the shape of a cylinder.

According to the battery 100 of the embodiment of the application, the battery 100 further comprises the case 30, and the battery cell 10 is accommodated in the case 30, so as to further provide external protection for the battery cell 10, and improve the cycle stability and reliability of the battery cell 10.

In a second aspect, an embodiment of the present application further provides an electrical device, including a battery 100 according to any embodiment of the first aspect of the present application, where the battery 100 is used to provide electrical energy.

As shown in fig. 1 to 5, according to a specific embodiment of the first aspect of the present application, a battery 100 is provided, which includes at least two battery cells 10, a connection pipe 20, and a case 30, wherein the battery cells 10 include a housing 11 having an accommodating space 101; the connection duct 20 is disposed between at least two battery cells 10 and communicates the accommodation spaces 101 of the at least two battery cells 10.

The housing 11 includes an end cover 111 and a shell 112, the end cover 111 and the shell 112 together form the accommodating space 101, and the end cover 111 and the shell 112 are welded to form a sealed and stable accommodating space 101 environment.

The connecting duct 20 is a hollow duct and includes a first section 21 and a number of second sections 22 matching the number of battery cells 10. In this embodiment, the first section 21 is a main pipe portion of the connecting pipe 20, that is, the accommodating space 101 of each battery cell 10 may be in communication with the first section 21, so as to realize exchange of gas in the accommodating space 101; the second section 22 is a branch pipe portion of the connecting pipe 20, and is used for communicating the first section 21 with the accommodating space 101 of each battery cell 10, the second section 22 is disposed near the battery cell 10, and a second section 22 is disposed corresponding to one battery cell 10.

The first section 21 has a first channel 211, the first channel 211 is a space isolated from the outside for exchanging the gas environment between the accommodating spaces 101 of the plurality of battery cells 10, the second section 22 has a second channel 221, wherein the second channel 221 is used for communicating the first channel 211 with the accommodating spaces 101 of the battery cells 10, and the second section 22 is used for exchanging the gas environment between the accommodating spaces 101 of the plurality of battery cells 10 together in cooperation with the first section 21.

In this embodiment, the first section 21 is an elastic tube and the second section 22 is a rigid tube. To increase the connection performance between the connection pipe 20 and the housing 11 by using the second section 22 and to increase the reliability of the connection pipe 20 when handling a large pressure by using the first section 21, so that the first section 21 can absorb a large pressure by its own elastic deformation when handling a large pressure and recover the original state by elastic deformation when the pressure is balanced among the plurality of battery cells 10, thereby improving the reliability.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. 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 (13)

1. A battery, comprising:

at least two battery cells, each of the battery cells including a housing having an accommodating space;

the connecting pipeline is arranged between at least two battery monomers and is used for communicating the accommodating spaces of the at least two battery monomers.

2. The battery of claim 1, wherein the connection pipe comprises:

a first section having a first channel;

and the second sections are connected with the first sections and are provided with second channels, the number of the second sections is the same as that of the battery cells, and the second channels are communicated with the first channels and the accommodating space of one battery cell.

3. The battery according to claim 2, wherein the number of the second segments is two, and two of the second segments are provided at both ends of the first segment, respectively.

4. A battery according to claim 3, wherein the number of the connection pipes is plural, and the accommodation space of the battery cell communicates with the accommodation spaces of the other battery cells through at least one of the connection pipes.

5. The battery of claim 4, wherein the connecting conduit is disposed between adjacent ones of the battery cells.

6. The battery of claim 2, wherein the second segment comprises:

a body portion connected to the first segment;

and the sealing piece is connected to one end of the body part, which is away from the first section, and is connected with the shell, and the second channel penetrates through the body part and the sealing piece.

7. The battery of claim 2, wherein the first section is a flexible tube and the second section is a rigid tube.

8. The battery according to claim 1, wherein the housing is provided with a communication hole through which the connection pipe communicates with the accommodation space.

9. The battery according to claim 8, wherein the case includes an end cap connected to the case to form the accommodation space, and a case body, the communication hole being provided at the end cap.

10. The battery according to claim 9, wherein the communication hole is a liquid filling hole.

11. The battery according to claim 10, wherein the housing further includes a sealing member, at least part of which is provided at a wall of the communication hole to form a through hole, through which the connection pipe communicates with the accommodation space.

12. The battery of claim 1, further comprising a case, wherein the battery cells are housed within the case.

13. An electrical device comprising a battery as claimed in any one of claims 1 to 12 for providing electrical energy.