CN216488284U

CN216488284U - Battery monomer, battery and consumer

Info

Publication number: CN216488284U
Application number: CN202122975168.2U
Authority: CN
Inventors: 苏华圣
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-10
Anticipated expiration: 2031-11-29

Abstract

The embodiment of the application provides a battery monomer, battery and consumer, belongs to battery technical field. The battery cell includes a case, an electrode assembly, an end cap, and a current collecting member. An electrode assembly is received in the case, the electrode assembly including a main body portion and a first tab. The end cover covers the opening of the shell and is provided with a liquid injection hole. The current collecting component is accommodated in the shell and positioned on one side of the end cover facing the main body part, and the current collecting component is used for connecting the first pole lug and the end cover so as to realize the electrical connection between the end cover and the pole lug. The current collecting member is provided with a first center hole disposed opposite to the liquid injection hole, and a flow guide passage configured to allow at least part of the electrolyte entering the interior of the battery cell from the liquid injection hole to enter the main body portion. The electrolyte entering the interior of the battery monomer from the electrolyte injection hole can more easily infiltrate the electrode assembly, the electrolyte injection efficiency is improved, and the infiltration effect of the electrolyte on the electrode assembly is improved.

Description

Battery monomer, battery and consumer

Technical Field

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

Background

Batteries are widely used in electronic devices such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.

The single battery generally includes a case, an electrode assembly, and an end cap, where the end cap covers the case to provide a sealed space for the electrode assembly and the electrolyte, and the single battery chemically reacts with the electrolyte through the electrode assembly to output electric energy. At present, electrolyte is generally injected into a battery monomer through an electrolyte injection hole in an end cover, and the electrolyte is difficult to infiltrate an electrode assembly.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a single battery, a battery and electric equipment, so as to solve the problem that an electrode assembly is difficult to soak by electrolyte.

In a first aspect, an embodiment of the present application provides a battery cell, including: a housing having an opening; an electrode assembly received in the case, the electrode assembly including a main body portion and a first tab protruding from one end of the main body portion; the end cover is covered on the opening, and a liquid injection hole is formed in the end cover; the current collecting component is accommodated in the shell and positioned on one side of the end cover facing the main body part, and the current collecting component is used for connecting the first tab and the end cover so as to realize that the end cover is electrically connected with the first tab; the current collecting member is provided with a first central hole and a flow guide channel, the first central hole is opposite to the liquid injection hole in the axial direction of the first central hole, and the flow guide channel is configured to allow at least part of electrolyte entering the interior of the battery cell from the liquid injection hole to enter the main body part.

Among the above-mentioned technical scheme, be equipped with first centre bore and water conservancy diversion passageway on the mass flow component, through annotating the in-process that liquid hole pours into electrolyte into battery monomer into to the inside, electrolyte not only can flow to the main part inside along the first centre bore of mass flow component, can also flow to the inside of main part along the water conservancy diversion passageway of mass flow component to soak the pole piece. The structure increases the channel for the electrolyte to flow to the inside of the main body part, so that the electrolyte entering the inside of the battery monomer through the electrolyte injection hole can more easily infiltrate the electrode assembly, the electrolyte injection efficiency is improved, and the infiltration effect of the electrolyte on the electrode assembly is improved.

In some embodiments, the current collecting member has opposing outer and inner surfaces, the outer surface facing the end cap and the inner surface facing the first tab; the flow guide channel comprises flow guide holes, and the flow guide holes penetrate through the outer surface and the inner surface of the flow collection member.

In the technical scheme, the flow guide hole penetrates through the outer surface and the inner surface of the current collecting component, the electrolyte entering the interior of the battery monomer through the liquid injection hole can directly flow from one side of the current collecting component facing the end cover to one side facing the main body part through the flow guide hole, so that the electrolyte enters the interior of the main body part to soak the pole piece.

In some embodiments, the deflector holes are offset from the first central hole to be independent of the first central hole.

In the technical scheme, the flow guide hole deviates from the first central hole, so that the forming processing of the flow guide hole is facilitated, and the flow collecting member has better strength.

In some embodiments, the flow guide holes extend through the hole wall of the first central hole.

In the technical scheme, the flow guide hole penetrates through the hole wall of the first central hole, so that the flow guide hole is communicated with the first central hole, and the electrolyte can flow in the flow guide hole and the first central hole mutually. If the electrolyte entering the flow guide hole cannot enter the main body part in time, the electrolyte can flow into the first central hole from the flow guide hole so as to enter the main body part through the first central hole. If the electrolyte entering the first central hole cannot enter the main body part in time, the electrolyte can flow into the flow guide hole from the first central hole so as to enter the main body part through the flow guide hole.

In some embodiments, the deflector holes extend radially of the first central hole.

Among the above-mentioned technical scheme, the water conservancy diversion hole is along the radial extension of first centre bore for electrolyte can be at the downthehole radial flow of first centre bore of water conservancy diversion for electrolyte has increased the flow range of electrolyte in the water conservancy diversion hole, makes electrolyte can enter into the inside of main part from a plurality of regions in water conservancy diversion hole, improves and annotates liquid efficiency and electrolyte to the infiltration effect of electrode subassembly.

In some embodiments, the flow guide passage includes a plurality of flow guide holes circumferentially spaced about the first central bore.

Among the above-mentioned technical scheme, a plurality of water conservancy diversion holes are around first centre bore circumference interval distribution, and electrolyte can flow to main part inside along a plurality of water conservancy diversion holes, improves and annotates liquid efficiency and electrolyte to electrode subassembly's infiltration effect.

In some embodiments, the end cap has an abutment face for abutment with the outer surface; the end cover is provided with a concave part, the concave part is sunken along the direction departing from the main body part from the abutting surface, the concave part is communicated with the liquid injection hole, and the concave part is arranged opposite to the at least one flow guide hole in the axial direction of the first center hole.

Among the above-mentioned technical scheme, the concave part with annotate the liquid hole intercommunication, in the in-process of annotating electrolyte to battery monomer inside through annotating the liquid hole, electrolyte can enter into in the concave part. Due to the fact that the concave portion is arranged opposite to the at least one flow guide hole, the electrolyte entering the concave portion can directly enter the at least one flow guide hole. Guarantee through annotating the in-process of liquid hole to the inside electrolyte that injects of battery monomer, electrolyte can get into the water conservancy diversion downthehole more easily, fast, when improving the effect of infiltrating of electrolyte to electrode subassembly, improved and annotated liquid efficiency.

In some embodiments, the end cap has a liquid outlet surface located in the concave portion, one end of the liquid injection hole penetrates through the liquid surface, and the liquid outlet surface is arranged at a gap from the outer surface.

Among the above-mentioned technical scheme, go out the liquid level and set up with the surface clearance for annotate liquid hole and concave part and be in the intercommunication state, be convenient for electrolyte from annotating the liquid hole and get into to the concave part in, be favorable to annotating the in-process of liquid hole to the inside electrolyte that injects of battery monomer through annotating, electrolyte flows to the inside of main part along the water conservancy diversion hole.

In some embodiments, the flow guide channel includes a flow guide slot disposed on a side of the current collecting member facing the first tab, and the first central aperture communicates with the flow guide slot.

Among the above-mentioned technical scheme, the guiding gutter sets up in the one side of the class of current collection component towards first utmost point ear to communicate with first centre bore, enter into the inside electrolyte of battery monomer through annotating the liquid hole and enter into first centre bore earlier, inside partly electrolyte enters into the main part through first centre bore, and another part electrolyte flows along the guiding gutter side direction, finally enters into the inside of main part from the guiding gutter. The flow guide grooves increase the lateral flowing range of the electrolyte, so that the electrolyte can enter the main body part more easily and quickly.

In some embodiments, the current collecting member includes: the body part is used for abutting against the end cover, and the first central hole is formed in the body part; two support parts for support and lean on in first utmost point ear, two support parts are all protruding locate this somatic part and deviate from one side of end cover, and two support parts are located first centre bore in radial ascending both sides respectively, support to form the guiding gutter between the part for two.

Among the above-mentioned technical scheme, the main part epirelief is equipped with two and supports the portion, forms the guiding gutter between two support portions for form great space that supplies the electrolyte to flow between main part and the main part and increase the scope that electrolyte lateral flow flows, in order to get into electrode subassembly better.

In some embodiments, the abutments are "V" shaped, with the two abutments facing away from each other.

Among the above-mentioned technical scheme, two support portions that are "V" shape structure are to setting up back to back for the guiding gutter between two support portions is the minimum gradual change structure of width in the position of first centre bore, has increased electrolyte at the guiding gutter flow range, so that electrolyte can enter into the inside of main part from a plurality of regions of guiding gutter, makes electrolyte enter into in the main part more easily and more fast.

In some embodiments, the first tab is welded with the abutment and forms a weld impression, which extends along the trajectory of the abutment.

Among the above-mentioned technical scheme, the seal that welds extends along the orbit of leaning on the portion for the seal that welds also is V-arrangement, makes whole leaning on portion and first utmost point ear zonulae occludens.

In some embodiments, the main body portion is provided with a second center hole disposed opposite to the first center hole in an axial direction of the first center hole.

In the technical scheme, the second central hole and the first central hole are arranged oppositely, and in the process of injecting electrolyte into the battery monomer through the electrolyte injection hole, the electrolyte entering the first central hole can quickly enter the first central hole so as to soak the pole piece.

In a second aspect, an embodiment of the present application provides a battery, including: the battery cell provided in any one of the embodiments of the first aspect; and the box body is used for accommodating the battery cells.

In a third aspect, an embodiment of the present application provides an electric device, including the battery provided in any one of the embodiments of the first aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

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

fig. 3 is an exploded view of a battery cell provided in some embodiments of the present application;

fig. 4 is a cross-sectional view of the battery cell shown in fig. 3;

FIG. 5 is a schematic structural view of the current collecting member shown in FIG. 4;

fig. 6 is a schematic structural view of a current collecting member according to further embodiments of the present application;

fig. 7 is a partial cross-sectional view of the battery cell shown in fig. 4;

fig. 8 is a partial cross-sectional view of a battery cell provided in accordance with other embodiments of the present application;

fig. 9 is a schematic structural view of the current collecting member shown in fig. 8;

fig. 10 is a flow chart of a method of manufacturing a battery cell according to some embodiments of the present disclosure;

fig. 11 is a schematic block diagram of a manufacturing apparatus of a battery cell provided in some embodiments of the present application.

Icon: 10-a box body; 11-a first part; 12-a second part; 20-a battery cell; 21-a housing; 22-an electrode assembly; 221-a body portion; 222-a first tab; 223-a second tab; 224-a second central aperture; 23-end caps; 231-liquid injection hole; 232-an abutment surface; 233-a recess; 2331-bottom surface; 234-liquid outlet; 235-a protrusion; 24-a current collecting member; 241-a first central aperture; 242-flow guide channels; 2421-a flow guide hole; 2422-a diversion trench; 243-outer surface; 244-an inner surface; 245-a body portion; 246-an abutment; 25-a blocking piece; 26-a seal; 100-a battery; 200-a controller; 300-a motor; 1000-a vehicle; 2000-manufacturing equipment; 2100-a first providing device; 2200-a second providing means; 2300-a third providing means; 2400-a fourth providing device; 2500-assembling the device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not 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 can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected 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 as appropriate.

In the embodiments of the present application, like reference numerals denote like parts, and a detailed description of the same parts is omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

The appearances of "a plurality" in this application are intended to mean more than two (including two).

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are also not limited in the embodiment of the application.

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, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece includes anodal mass flow body and anodal active substance layer, and anodal active substance layer coats in anodal mass flow body's surface, and the anodal mass flow body protrusion in the anodal mass flow body that has coated anodal active substance layer of uncoated anodal active substance layer, and the anodal mass flow body that does not coat anodal active substance layer is as anodal utmost point ear. 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 pole piece includes negative pole mass flow body and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative pole mass flow body, and the negative pole mass flow body protrusion in the negative pole mass flow body of coating the negative pole active substance layer not coating the negative pole active substance layer, and the negative pole mass flow body of not coating the negative pole active substance layer is as negative pole utmost point ear. 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 fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

For a typical battery cell, the end cap needs to be electrically connected to the tabs of the electrode assembly so that the end cap serves as an output electrode for outputting electrical energy from the battery cell. In order to better realize the electrical connection between the end cover and the tab, a current collecting member is generally disposed between the electrode assembly and the end cover, and both the end cover and the tab are connected to the current collecting member, so as to realize the electrical connection between the end cover and the tab.

The inventor notices that after the end cover and the electrode assembly are provided with the current collecting component, in the process of injecting electrolyte into the battery monomer through the liquid injection hole on the end cover, the current collecting component has a blocking effect on the electrolyte, the electrolyte is difficult to enter the battery monomer, and the electrolyte is difficult to infiltrate the electrode assembly.

In order to solve the problem that the electrolyte is difficult to infiltrate into the electrode assembly, the applicant researches and discovers that a central hole can be formed in the current collecting component, and the electrolyte flows into the main body part of the electrode assembly through the central hole in the current collecting component in the process of injecting the electrolyte into the battery monomer through the electrolyte injection hole. However, the flow conductivity of the central hole on the current collecting component is limited, and the problem that the electrolyte is difficult to infiltrate the electrode assembly still exists.

Based on the above consideration, in order to solve the problem that the electrolyte is difficult to infiltrate the electrode assembly, the inventor designs a single battery through intensive research, and further arranges a flow guide channel on the current collecting component on the basis that the current collecting component is provided with a central hole, wherein the flow guide channel can allow at least part of the electrolyte entering the single battery from the liquid injection hole on the end cover to enter the main body part of the electrode assembly.

In such a single battery, the current collecting member is provided with a central hole and a flow guide channel, and in the process of injecting the electrolyte into the single battery through the liquid injection hole, the electrolyte can flow not only to the inside of the main body part along the central hole of the current collecting member, but also to the inside of the main body part along the flow guide channel of the current collecting member, so as to infiltrate the pole piece. The structure increases the channel for the electrolyte to flow to the inside of the main body part, so that the electrolyte entering the inside of the battery monomer through the electrolyte injection hole can more easily infiltrate the electrode assembly, the electrolyte injection efficiency is improved, and the infiltration effect of the electrolyte on the electrode assembly is improved.

The battery cell described in the embodiment of the present application is suitable for a battery and an electric device using the battery.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and electric tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure, a battery 100 is disposed inside the vehicle 1000, and the battery 100 may be disposed at a bottom portion, a head portion, or a tail portion of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000.

The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

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

Referring to fig. 2, fig. 2 is a schematic structural diagram of a battery 100 according to some embodiments of the present disclosure, where the battery 100 includes a case 10 and a battery cell 20, and the case 10 is used for accommodating the battery cell 20.

The case 10 is a component for accommodating the battery cell 20, the case 10 provides an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, and the first portion 11 and the second portion 12 cover each other to define a receiving space for receiving the battery cell 20. The first and second portions 11 and 12 may be in various shapes, such as rectangular parallelepiped, cylindrical, etc. The first portion 11 may be a hollow structure with one side open, the second portion 12 may also be a hollow structure with one side open, and the open side of the second portion 12 is covered on the open side of the first portion 11, thereby forming the box body 10 with a receiving space. The first portion 11 may have a hollow structure with one side opened, the second portion 12 may have a plate-like structure, and the second portion 12 may cover the opened side of the first portion 11 to form the case 10 having an accommodating space. The first part 11 and the second part 12 may be sealed by a sealing element, which may be a sealing ring, a sealant or the like.

In the battery 100, one or more battery cells 20 may be provided. If there are a plurality of battery cells 20, the plurality of battery cells 20 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to that the plurality of battery cells 20 are connected in series or in parallel. A plurality of battery cells 20 may be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a whole, and may be accommodated in the case 10. Or all the battery cells 20 may be directly connected in series or in parallel or in series-parallel, and the whole of all the battery cells 20 is accommodated in the case 10.

In some embodiments, the battery 100 may further include a bus member, and the plurality of battery cells 20 may be electrically connected to each other through the bus member, so as to connect the plurality of battery cells 20 in series or in parallel or in series-parallel. The bus member may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, or the like.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 20 according to some embodiments of the present disclosure, and the battery cell 20 may include a case 21, an electrode assembly 22, an end cap 23, and a current collecting member 24.

Case 21 is a member for accommodating electrode assembly 22, and case 21 may be a hollow structure having one end opened, or case 21 may be a hollow structure having both ends opened. The material of the housing 21 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The housing 21 may be in various shapes, such as a cylinder, a rectangular parallelepiped, or the like. Illustratively, in fig. 3, the housing 21 is a cylinder.

The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. The electrode assembly 22 may include a body 221, a first tab 222 and a second tab 223, wherein the first tab 222 and the second tab 223 protrude from one end of the body 221, and of course, the first tab 222 and the second tab 223 may be located at the same end of the body 221, or may be located at two opposite ends of the body 221. One of the first tab 222 and the second tab 223 is a positive tab, and the other is a negative tab. The body portion 221 may include a positive electrode tab, a negative electrode tab, and a separator. The body 221 may have a winding structure formed by winding a positive electrode tab, a separator, and a negative electrode tab. The main body portion 221 may also be a laminated structure formed by a lamination arrangement of a positive electrode tab, a separator, and a negative electrode tab.

The positive pole piece comprises a positive current collector and positive active material layers coated on two opposite sides of the positive current collector. The negative pole piece comprises a negative current collector and negative active material layers coated on two opposite sides of the negative current collector. The body portion 221 is a portion of the electrode assembly 22 corresponding to an area where the electrode sheet is coated with an active material layer, the positive electrode tab is a portion of the positive electrode sheet where the positive electrode active material layer is not coated, and the negative electrode tab is a portion of the negative electrode sheet where the negative electrode active material layer is not coated.

The end cap 23 is a member that covers an opening of the case 21 to isolate the internal environment of the battery cell 20 from the external environment. The end cap 23 covers an opening of the case 21, and the end cap 23 and the case 21 together define a sealed space for accommodating the electrode assembly 22, the electrolyte, and other components. The shape of the end cap 23 can be adapted to the shape of the housing 21, for example, the housing 21 has a rectangular parallelepiped structure, the end cap 23 has a rectangular plate structure adapted to the housing 21, and for example, the housing 21 has a cylindrical structure, and the end cap 23 has a circular plate structure adapted to the housing 21. The end cap 23 may be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.

In the battery cell 20, there may be one or two end caps 23, and the number of the end caps 23 may be determined according to the specific structure of the housing 21. For example, the housing 21 is a hollow structure with an opening formed at one end, and one end cap 23 may be correspondingly disposed; for another example, the housing 21 has a hollow structure with two opposite ends forming an opening, two end caps 23 may be correspondingly disposed, and the two end caps 23 cover the two openings of the end caps 23 respectively.

The current collecting member 24 is a component that realizes electrical connection of the end cap 23 with the tab. In the battery cell 20, the current collecting member 24 may be one or two. In the embodiment that the end cap 23 in the battery cell 20 is one, one current collecting member 24 may be correspondingly provided, and the first tab 222 may be connected to the end cap 23 through the current collecting member 24, and the second tab 223 may be connected to the housing 21, so that the housing 21 and the end cap 23 respectively serve as two output poles of the battery cell 20 to output electric energy. In the embodiment that there are two end covers 23 in the battery cell 20, there may be two current collecting members 24, and there may be two current collecting members, where the first tab 222 is connected to the end cover 23 through one current collecting member 24, and the second tab 223 is connected to the end cover 23 through the other current collecting member 24, so that the two end covers 23 respectively serve as two output poles of the battery cell 20 to output electric energy.

Referring to fig. 4, fig. 4 is a cross-sectional view of the battery cell 20 shown in fig. 3, and an embodiment of the present disclosure provides a battery cell 20, where the battery cell 20 includes a case 21, an electrode assembly 22, an end cap 23, and a current collecting member 24. The housing 21 has an opening. The electrode assembly 22 is received in the case 21, and the electrode assembly 22 includes a body portion 221 and a first tab 222, the first tab 222 protruding from one end of the body portion 221. The cap 23 covers the opening, and the cap 23 is provided with a liquid injection hole 231. The current collecting member 24 is accommodated in the housing 21 and located on a side of the end cover 23 facing the body portion 221, and the current collecting member 24 is used for connecting the first tab 222 and the end cover 23 to electrically connect the end cover 23 with the first tab 222. Wherein the current collecting member 24 is provided with a first center hole 241 and a flow guide channel 242, the first center hole 241 is disposed opposite to the liquid injection hole 231 in the axial direction of the first center hole 241, and the flow guide channel 242 is configured to allow at least part of the electrolyte that enters the interior of the battery cell 20 from the liquid injection hole 231 to enter the main body portion 221.

The liquid injection hole 231 of the end cap 23 may be a circular hole. The end cap 23 may be provided with a sealing member 25 for sealing the liquid inlet 231 so that the liquid inlet 231 is sealed by the sealing member 25 after the electrolyte is injected into the battery cell 20 through the liquid inlet 231. The end cap 23 and the housing 21 may be hermetically connected by a sealing member 26, and the sealing member 26 may be made of rubber, plastic, or the like.

The current collecting member 24 is a conductor, and may be made of copper, iron, aluminum, steel, aluminum alloy, or the like. The current collecting member 24 is connected to both the first tab 222 and the end cover 23 to electrically connect the first tab 222 to the end cover 23. The connection of both the current collecting member 24 and the first tab 222 may be accomplished in a non-fixed manner, e.g., the current collecting member 24 and the first tab 222 are merely held in abutting contact; the current collecting member 24 and the first tab 222 may be fixedly connected, for example, the current collecting member 24 is welded to the first tab 222. Both the current collecting member 24 and the end cap 23 may be connected in a non-fixed manner, e.g., the current collecting member 24 and the end cap 23 are merely held in abutting contact; the current collecting member 24 and the end cap 23 may be fixedly connected, for example, the current collecting member 24 and the end cap 23 are welded. The first tab 222 connected to the current collecting member 24 may be a positive or negative tab. The first tab 222 may be an annular structure, and the first tab 222 may be disposed coaxially with the body portion 221.

The first center hole 241 is a through hole provided at a center position of the current collecting member 24. Taking the current collecting member 24 as a disk structure as an example, the axis of the first center hole 241 coincides with the axis of the current collecting member 24. The first center hole 241 and the liquid inlet 231 are provided so as to face each other in the axial direction of the first center hole 241, and the first center hole 241 may be coaxial with the liquid inlet 231, or the axis of the first center hole 241 may be slightly offset from the axis of the liquid inlet 231. As long as the first center hole 241 and the liquid inlet hole 231 are not completely displaced in the radial direction of the first center hole 241, it is understood that the first center hole 241 and the liquid inlet hole 231 are disposed opposite to each other in the axial direction of the first center hole 241.

The flow guide channels 242 are channels on the flow collection member 24 distinct from the first central aperture 241. The guide passage 242 may be disposed around the first center hole 241 independently of the first center hole 241; the flow guide passage 242 may also communicate with the first center hole 241. The flow guide channels 242 may be through holes that extend through the outer surface 243 and the inner surface 244 of the current collecting member 24 or may be slots that are disposed in the outer surface 243 or the inner surface 244 of the current collecting member. The outer surface 243 of the current collecting member 24 refers to a surface of the current collecting member 24 facing the end cover 23 in the thickness direction, and the inner surface 244 of the current collecting member 24 refers to a surface of the current collecting member 24 facing the first tab 222 in the thickness direction. The flow guide passage 242 may be one or more. Taking the flow guide channel 242 as a plurality, the plurality of flow guide channels 242 may be distributed around the first center hole 241.

The current collecting member 24 is provided with a first center hole 241 and a flow guide passage 242, and when the electrolyte is injected into the battery cell 20 through the injection hole 231, the electrolyte can flow not only into the main body 221 along the first center hole 241 of the current collecting member 24, but also into the main body 221 along the flow guide passage 242 of the current collecting member 24, so as to wet the pole piece. This structure increases the passage of the electrolyte to the inside of the body 221, so that the electrolyte entering the inside of the battery cell 20 through the electrolyte injection hole 231 can more easily infiltrate the electrode assembly 22, the electrolyte injection efficiency is improved, and the infiltration effect of the electrolyte on the electrode assembly 22 is improved.

In some embodiments, referring to fig. 4 and 5, fig. 5 illustrates a schematic view of the structure of the current collecting member 24 shown in fig. 4, the current collecting member 24 having opposing outer and

inner surfaces

243, 244, the outer surface 243 facing the end cap 23 and the inner surface 244 facing the first tab 222. The flow guide channel 242 includes flow guide holes 2421, the flow guide holes 2421 extending through the outer surface 243 and the inner surface 244 of the current collecting member 24.

The outer surface 243 of the current collecting member 24 may abut the end cap 23, maintaining the current collecting member 24 in contact with the end cap 23. The inner surface 244 of the current collecting member 24 may abut the first tab 222, maintaining the first tab 222 of the current collecting member 24 in contact. Illustratively, to further improve the stability of the contact between the current collecting member 24 and the end cover 23 and between the current collecting member 24 and the first tab 222, the current collecting member 24 may be welded to the first tab 222 and the current collecting member 24 may be welded to the end cover 23.

The guide holes 2421 are through holes penetrating through the outer surface 243 and the inner surface 244 of the collecting member 24, and the guide holes 2421 may be holes having various shapes, for example, a circular hole, a square hole, a strip hole, a circular hole, and the like. The flow guide hole 2421 in the flow guide channel 242 may be one or more.

In the present embodiment, since the flow guide holes 2421 penetrate through the outer surface 243 and the inner surface 244 of the current collecting member 24, the electrolyte entering the inside of the battery cell 20 through the electrolyte injection hole 231 can directly flow from the side of the current collecting member 24 facing the end cap 23 to the side facing the main body portion 221 through the flow guide holes 2421, so that the electrolyte enters the inside of the main body portion 221 to wet the pole piece.

In some embodiments, with continued reference to fig. 5, the guiding holes 2421 are offset from the first center hole 241 so as to be independent from the first center hole 241.

The guide holes 2421 are offset from the first center hole 241, i.e., the guide holes 2421 are spaced apart from the first center hole 241 such that the guide holes 2421 and the first center hole 241 are independent from each other.

As shown in fig. 5, in the case where the guide hole 2421 in the guide passage 242 is plural, the guide hole 2421 may be provided plural in the radial direction of the first center hole 241 and plural in the circumferential direction of the first center hole 241. Illustratively, the flow guide holes 2421 are circular holes.

In the present embodiment, since the guide holes 2421 are offset from the first central hole 241, the forming process of the guide holes 2421 is facilitated, and the current collecting member 24 has better strength.

In some embodiments, referring to fig. 6, fig. 6 is a schematic structural view of the current collecting member 24 according to other embodiments of the present disclosure, and the flow guiding hole 2421 penetrates through a hole wall of the first central hole 241.

The guide hole 2421 penetrates through the hole wall of the first center hole 241, and the guide hole 2421 is in a communication state with the first center hole 241. Taking the diversion hole 2421 as a long hole or an arc hole as an example, one end of the diversion hole 2421 in the extending direction thereof penetrates through the hole wall of the first center hole 241.

In the case where the guide hole 2421 in the guide passage 242 is plural, the guide hole 2421 may be provided plural in the circumferential direction of the first center hole 241.

In the present embodiment, the guide holes 2421 communicate with the first center hole 241 so that the electrolytes can flow each other within the guide holes 2421 and the first center hole 241. If the electrolyte entering the guide holes 2421 cannot timely enter the main body part 221, the electrolyte can flow into the first center hole 241 from the guide holes 2421 to enter the main body part 221 through the first center hole 241. If the electrolyte entering the first center hole 241 cannot enter the main body part 221 in time, the electrolyte can flow into the diversion holes 2421 from the first center hole 241 to enter the main body part 221 through the diversion holes 2421.

In some embodiments, with continued reference to fig. 6, the guiding holes 2421 extend along the radial direction of the first central hole 241.

It can be understood that the guiding holes 2421 are elongated holes, and the extending direction of the guiding holes 2421 is consistent with the radial direction of the first central hole 241.

In the present embodiment, since the flow guide holes 2421 extend in the radial direction of the first center hole 241, the electrolyte can flow in the flow guide holes 2421 in the radial direction of the first center hole 241, so that the flow range of the electrolyte in the flow guide holes 2421 is increased, the electrolyte can enter the inside of the main body portion 221 from multiple areas of the flow guide holes 2421, and the electrolyte injection efficiency and the electrolyte infiltration effect on the electrode assembly 22 are improved.

In some embodiments, referring to fig. 5 and 6, the flow guide channel 242 includes a plurality of flow guide holes 2421, and the plurality of flow guide holes 2421 are circumferentially spaced around the first center hole 241. This structure enables the electrolyte to flow into the main body 221 along the plurality of flow guide holes 2421, thereby improving the electrolyte injection efficiency and the electrolyte infiltration effect on the electrode assembly 22.

In some embodiments, referring to fig. 7, fig. 7 is a partial cross-sectional view of the battery cell 20 shown in fig. 4, and the end cap 23 has an abutting surface 232, and the abutting surface 232 is used for abutting against the outer surface 243. The end cap 23 is provided with a recessed portion 233, the recessed portion 233 is recessed from the abutting surface 232 in a direction away from the main body portion 221, the recessed portion 233 communicates with the pour hole 231, and the recessed portion 233 is disposed opposite to the at least one baffle hole 2421 in the axial direction of the first center hole 241.

The abutment surface 232 is the surface against which the end cap 23 abuts the outer surface 243 of the current collecting member 24. The recess 233 is a recessed space on the end cover 23 recessed from the abutting face 232 in a direction away from the main body portion 221. The concave portion 233 may be a circular groove provided coaxially with the pour hole 231.

The concave portion 233 is in communication with the injection hole 231, or the concave portion 233 is in communication with the injection hole 231 in the axial direction, for example, the concave portion 233 and the injection hole 231 together form a stepped hole, and one end of the injection hole 231 in the axial direction is in communication with one end of the concave portion 233 in the axial direction; it is also possible that the recess 233 is in radial communication with the pour hole 231, for example, the pour hole 231 is at least partially located inside the recess 233, and both are in communication via radially arranged portholes.

Note that, as long as the recessed portion 233 is not completely misaligned with the at least one pilot hole 2421 in the radial direction of the first center hole 241, it should be understood that the recessed portion 233 is disposed opposite to the at least one pilot hole 2421 in the axial direction of the first center hole 241. It is also understood that the recess 233 covers a part or all of the at least one guide hole 2421 in the axial direction of the first center hole 241.

As shown in fig. 5, in an embodiment where the guide holes 2421 are offset from the first center hole 241 and the guide holes 2421 are distributed in a plurality along the circumferential direction of the first center hole 241, the concave portions 233 (not shown in fig. 5) may be disposed opposite to all the guide holes 2421 or may be disposed opposite to part of the guide holes 2421. As shown in fig. 6, in an embodiment that the guide holes 2421 penetrate through the hole wall of the first center hole 241 and the guide holes 2421 are distributed in a plurality along the circumferential direction of the first center hole 241, the concave portions 233 (not shown in fig. 6) may be disposed opposite to all the guide holes 2421 or some of the guide holes 2421.

In the present embodiment, the concave portion 233 communicates with the liquid inlet 231, and the electrolyte can enter the concave portion 233 in the process of injecting the electrolyte into the battery cell 20 through the liquid inlet 231. Since the area where the concave part 233 is located covers at least a portion of the flow guide holes 2421, the electrolyte entering the concave part 233 can directly enter at least one flow guide hole 2421. Guarantee through annotating the in-process of liquid hole 231 to the inside electrolyte that injects of battery monomer 20, in the electrolyte can get into water conservancy diversion hole 2421 more easily, fast, when improving the effect of infiltrating of electrolyte to electrode subassembly 22, improved and annotated liquid efficiency.

In some embodiments, with reference to fig. 7, the cap 23 has a liquid outlet surface 234 located in the concave portion 233, one end of the liquid injection hole 231 penetrates through the liquid outlet surface 234, and the liquid outlet surface 234 is spaced from the outer surface 243.

The liquid outlet surface 234 is provided with a gap from the outer surface 243, and the liquid outlet surface 234 and the outer surface 243 are not in contact with each other, but a gap is formed therebetween, and the electrolyte can flow into the recess 233 through the gap.

Illustratively, the concave part 233 has a bottom surface 2331 facing the outer surface 243, the bottom surface 2331 is convexly provided with a convex part 235, one end of the convex part 235 facing the outer surface 243 forms a liquid outlet surface 234, and a gap is formed between the outer circumferential surface of the convex part 235 and the inner circumferential surface of the concave part 233 so as to accommodate the electrolyte. The pouring hole 231 is provided in the protruding portion 235, and the provision of the protruding portion 235 can enhance the strength at which the lid 23 is provided at the position of the pouring hole 231. The bottom surface 2331 is the surface of the concave part 233 farthest from the outer surface 243, the outer peripheral surface is the surface where the convex part 235 is connected between the bottom surface 2331 and the liquid outlet surface 234, and the inner peripheral surface is the surface where the concave part 233 is connected between the bottom surface 2331 and the abutting surface 232.

In the present embodiment, the liquid outlet surface 234 is spaced from the outer surface 243, so that the liquid inlet 231 is in communication with the concave portion 233, which facilitates the electrolyte to enter the first concave portion 233 from the liquid inlet 231, and facilitates the electrolyte to flow along the flow guide hole 2421 to the inside of the main body portion 221 during the process of injecting the electrolyte into the battery cell 20 through the liquid inlet 231.

In some embodiments, referring to fig. 8 and 9, fig. 8 is a partial cross-sectional view of a battery cell 20 according to other embodiments of the present disclosure, fig. 9 is a schematic structural view of the current collecting member 24 shown in fig. 8, the current guiding channel 242 includes a guiding groove 2422, the guiding groove 2422 is disposed on a side of the current collecting member 24 facing the first tab 222, and the first central hole 241 is in communication with the guiding groove 2422.

The guide groove 2422 may have various shapes, for example, a bar groove, a circular groove, a fan groove, etc. The number of the guide grooves 2422 in the guide passage 242 may be one or more. Taking the guide grooves 2422 in the guide passage 242 as a plurality, the guide grooves 2422 may be circumferentially spaced around the first center hole 241.

In the case that the flow guide channel 242 includes the flow guide grooves 2422, the flow guide channel 242 may also include the flow guide holes 2421 in the previous embodiments, that is, only the flow guide grooves 2422 or the flow guide holes 2421, or both the flow guide grooves 2422 and the flow guide holes 2421 may be in the flow guide channel 242. For example, in fig. 9, only the guide groove 2422 is provided in the guide passage 242.

The guide groove 2422 is disposed on one side of the current collecting member 24 facing the first tab 222, and is communicated with the first central hole 241, the electrolyte entering the interior of the battery cell 20 through the electrolyte injection hole 231 first enters the first central hole 241, a part of the electrolyte enters the interior of the main body portion 221 through the first central hole 241, and the other part of the electrolyte flows laterally along the guide groove 2422 and finally enters the interior of the main body portion 221 from the guide groove 2422. The guide grooves 2422 increase the lateral flow range of the electrolyte so that the electrolyte can be more easily and rapidly introduced into the main body part 221.

In some embodiments, with continued reference to fig. 9, the current collecting member 24 includes a body portion 245 and an abutment portion 246. The body portion 245 is configured to abut against the end cap 23 (not shown in fig. 9), and the first center hole 241 is disposed in the body portion 245. Two abutting portions 246 are used for abutting against the first tab 222 (not shown in fig. 9), the two abutting portions 246 are both protruded from one side of the body portion 245 facing away from the end cover 23, the two abutting portions 246 are respectively located on two sides of the first central hole 241 in the radial direction, and a diversion groove 2422 is formed between the two abutting portions 246.

The body portion 245 is a major portion of the current collecting member 24, the abutting portion 246 is a portion of the current collecting member 24 protruding from the body portion 245, and the body portion 245 and the abutting portion 246 may be an integral structure. The body portion 245 abuts the end cap 23 such that the body portion 245 remains in contact with the end cap 23. The abutment 246 abuts against the first tab 222 so that the abutment 246 maintains contact with the first tab 222. For example, to further improve the stability of the contact between the current collecting member 24 and the end cover 23 and between the current collecting member 24 and the first tab 222, the abutting portion 246 may be welded to the first tab 222, and the body portion 245 may be welded to the end cover 23.

Illustratively, the body portion 245 is a disk structure, and the first center hole 241 is disposed at a center position of the body portion 245.

In an embodiment where the flow guiding channel 242 further includes a flow guiding hole 2421, the flow guiding hole 2421 and the flow guiding groove 2422 may be independent from each other or may be communicated with each other, for example, the flow guiding hole 2421 is communicated with the flow guiding groove 2422, the flow guiding hole 2421 may be disposed on the main body portion 245, the flow guiding hole 2421 penetrates through a surface of the main body portion 245 away from the end cap 23, so that the flow guiding hole 2421 is communicated with the flow guiding groove 2422.

In this embodiment, two abutting portions 246 are protruded from the main body 245, and a flow guide groove 2422 is formed between the two abutting portions 246, so that a larger space for flowing the electrolyte is formed between the main body 245 and the main body 221, and the lateral flowing range of the electrolyte is increased, so as to better enter the electrode assembly 22.

In addition, the abutting portion 246 protrudes from the body portion 245, it is easier to ensure the flatness of the surface of the abutting portion 246 for abutting against the first tab 222, so that the abutting portion 246 and the first tab 222 can maintain good contact.

In some embodiments, with continued reference to fig. 9, the abutment 246 is "V" shaped, with two abutments 246 facing away from each other.

Since the abutting portion 246 has a "V" shape, the abutting portion 246 has a tip end and an open end, and the tip end is closer to the first center hole 241 than the open end in the radial direction of the first center hole 241. With two abutments 246 facing away from each other is meant that the open ends of the two abutments 246 are facing away from each other.

In the present embodiment, the two abutting portions 246 having the "V" shaped structures are oppositely disposed, so that the guide grooves 2422 between the two abutting portions 246 are the gradually-varied structures having the smallest width at the position of the first central hole 241, and the flowing range of the electrolyte within the guide grooves 2422 is increased, so that the electrolyte can enter the inside of the main body portion 221 from a plurality of regions of the guide grooves 2422, and the electrolyte can enter the main body portion 221 more easily and more rapidly.

In addition, because the abutting portion 246 is in a V-shaped structure, the contact range of the current collecting member 24 and the first tab 222 in the radial direction of the first central hole 241 is increased, so that the current collecting member 24 can abut against the inner ring portion of the first tab 222 and the outer ring portion of the first tab 222, and the polarization phenomenon is not easy to occur.

In some embodiments, the first tab 222 (shown in fig. 8) is welded to the abutment 246 and forms a weld that extends along the trajectory of the abutment 246.

The area where the first tab 222 is weld-fused with the abutment 246 forms a weld impression. Because abutment 246 is of a "V" configuration, the weld runs along the trajectory of abutment 246, such that the weld is also "V" shaped. This structure makes the entire abutting portion 246 tightly connected to the first tab 222, reducing the occurrence of polarization.

In some embodiments, with continued reference to fig. 7 and 8, the main body 221 is provided with a second central hole 224, and the second central hole 224 is disposed opposite to the first central hole 241 in the axial direction of the first central hole 241.

Taking a winding type structure in which the main body 221 is formed by winding the positive electrode tab, the separator, and the negative electrode tab, the second center hole 224 is formed at the core position of the main body 221.

Note that, as long as the second center hole 224 is not completely displaced from the first center hole 241 in the radial direction of the first center hole 241, it should be understood that the second center hole 224 is disposed opposite to the first center hole 241 in the axial direction of the first center hole 241. Of course, the second center hole 224 may be disposed coaxially with the first center hole 241, or the axis of the second center hole 224 may be slightly offset from the axis of the first center hole 241. Illustratively, in fig. 7 and 8, the second center hole 224, the first center hole 241, and the pour hole 231 are coaxially disposed.

In this embodiment, the second central hole 224 is disposed opposite to the first central hole 241, and during the process of injecting the electrolyte into the battery cell 20 through the electrolyte injection hole 231, the electrolyte entering the first central hole 241 can quickly enter the first central hole 241 to wet the pole piece.

The embodiment of the present application provides a battery 100, which includes a case 10 and a battery cell 20 provided in any one of the above embodiments, where the case 10 is used to accommodate the battery cell 20.

The embodiment of the present application provides an electric device, including the battery 100 provided in any one of the above embodiments.

In addition, referring to fig. 3 and 4, an embodiment of the present application provides a cylindrical battery including a case 21, an electrode assembly 22, an end cap 23, and a current collecting member 24. The electrode assembly 22 includes a body portion 221, and first and

second tabs

222 and 223 of opposite polarities, the first and

second tabs

222 and 223 protruding from the body portion 221 and being located at opposite ends of the body portion 221, respectively, the first tab 222 being connected to the end cap 23 through the current collecting member 24, and the second tab 223 being connected to the case 21. The current collecting member 24 is provided with a first center hole 241 and a flow guide passage 242, the first center hole 241 being disposed opposite to the injection hole 231 in the end cover 23 and opposite to the second center hole 224 in the main body portion 221 in the axial direction of the first center hole 241, the flow guide passage 242 being configured to allow at least part of the electrolyte that enters the interior of the battery cell 20 from the injection hole 231 to enter the main body portion 221.

In such a cylindrical battery, the current collecting member 24 is provided with the first center hole 241 and the flow guide channel 242, and during the process of injecting the electrolyte into the battery cell 20 through the electrolyte injection hole 231, the electrolyte can flow not only into the main body portion 221 along the first center hole 241 of the current collecting member 24, but also into the main body portion 221 along the flow guide channel 242 of the current collecting member 24, so that the electrolyte entering into the battery cell 20 through the electrolyte injection hole 231 can more easily infiltrate the electrode assembly 22, the electrolyte injection efficiency is improved, and the infiltration effect of the electrolyte on the electrode assembly 22 is improved.

Referring to fig. 10, fig. 10 is a flowchart of a method for manufacturing a battery cell 20 according to some embodiments of the present disclosure, where the method for manufacturing a battery cell 20 includes:

s100: providing a housing 21, the housing 21 having an opening;

s200: providing an electrode assembly 22, wherein the electrode assembly 22 comprises a main body part 221 and a first tab 222, and the first tab 222 protrudes out of one end of the main body part 221;

s300: providing an end cover 23, wherein the end cover 23 is provided with a liquid injection hole 231;

s400: providing a flow collection member 24, the flow collection member 24 being provided with a first central aperture 241 and flow guide channels 242;

s500: connecting the current collecting member 24 with the first tab 222;

s600: the electrode assembly 22 is accommodated in the case 21;

s700: covering the end cover 23 on the opening;

s800: the end cap 23 is connected to the current collecting member 24 to electrically connect the end cap 23 to the first tab 222.

Wherein the current collecting member 24 is accommodated in the case 21 on a side of the end cap 23 facing the main body portion 221, the first center hole 241 is disposed opposite to the liquid injection hole 231 in an axial direction of the first center hole 241, and the flow guide passage 242 is configured to allow at least a part of the electrolyte entering the interior of the battery cell 20 from the liquid injection hole 231 to enter the main body portion 221.

In the above method, the order of step S100, step S200, step S300, and step S400 is not limited, for example, step S400, step S300, step S200, and step S100 may be executed first, then step S300, and then step S200 may be executed.

In addition, in the above method, the order of step S500 and step S600 is not limited, for example, step S600 may be executed first, and then step S500 may be executed.

It should be noted that, for the structure of the battery cell 20 manufactured by the manufacturing method provided in the foregoing embodiments, reference may be made to the battery cell 20 provided in each of the foregoing embodiments, and details are not described herein again.

Referring to fig. 11, fig. 11 is a schematic block diagram of a manufacturing apparatus 2000 for a battery cell 20 according to some embodiments of the present disclosure, and the manufacturing apparatus 2000 for a battery cell 20 according to the embodiments of the present disclosure includes a first providing device 2100, a second providing device 2200, a third providing device 2300, a fourth providing device 2400, and an assembling device 2500.

The first providing device 2100 is used to provide a housing 21, and the housing 21 has an opening. The second providing device 2200 is used for providing the electrode assembly 22, and the electrode assembly 22 includes a body part 221 and a first tab 222, and the first tab 222 protrudes from one end of the body part 221. The third providing device 2300 is used for providing the end cap 23, and the liquid injection hole 231 is formed in the end cap 23. The fourth providing device 2400 is used to provide the current collecting member 24, and the current collecting member 24 is provided with a first center hole 241 and a flow guiding channel 242. The assembly device 2500 is used to connect the current collecting member 24 with the first tab 222; and also for accommodating electrode assembly 22 within case 21; the assembly device 2500 is also used for covering the end cover 23 on the opening; the assembly device 2500 is also used to connect the end cap 23 with the current collecting member 24 to make electrical connection of the end cap 23 with the tab.

It should be noted that, with regard to the structure of the battery cell 20 manufactured by the manufacturing apparatus 2000 provided in the foregoing embodiments, reference may be made to the battery cell 20 provided in each of the foregoing embodiments, and details are not repeated herein.

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

The above embodiments are merely for illustrating the technical solutions of the present application and are not intended to limit the present application, and those skilled in the art can make various modifications and variations of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cell, comprising:

a housing having an opening;

an electrode assembly received in the case, the electrode assembly including a main body portion and a first tab protruding from one end of the main body portion;

the end cover covers the opening, and a liquid injection hole is formed in the end cover;

the current collecting component is accommodated in the shell and positioned on one side of the end cover facing the main body part, and the current collecting component is used for connecting the first tab and the end cover so as to realize the electrical connection between the end cover and the first tab;

the current collecting member is provided with a first central hole and a flow guide channel, the first central hole is opposite to the liquid injection hole in the axial direction of the first central hole, and the flow guide channel is configured to allow at least part of electrolyte entering the interior of the battery cell from the liquid injection hole to enter the main body part.

2. The battery cell as recited in claim 1 wherein the current collecting member has opposing outer and inner surfaces, the outer surface facing the end cap and the inner surface facing the first tab;

the flow guide channel comprises flow guide holes, and the flow guide holes penetrate through the outer surface and the inner surface of the flow collection member.

3. The battery cell as recited in claim 2 wherein the flow guide holes are offset from the first central hole to be independent of the first central hole.

4. The battery cell of claim 2, wherein the flow guide holes extend through a hole wall of the first central hole.

5. The battery cell as recited in claim 4 wherein the flow guide holes extend radially of the first central hole.

6. The battery cell as recited in claim 2 wherein the flow guide channel comprises a plurality of flow guide holes circumferentially spaced around the first central aperture.

7. The battery cell as recited in claim 2 wherein the end cap has an abutment surface for abutment with the outer surface;

the end cover is provided with a concave part, the concave part is sunken from the abutting surface along the direction departing from the main body part, the concave part is communicated with the liquid injection hole, and the concave part is opposite to the at least one flow guide hole in the axial direction of the first center hole.

8. The battery cell as recited in claim 7, wherein the end cap has a liquid outlet surface located in the recess, one end of the liquid inlet hole penetrates the liquid outlet surface, and the liquid outlet surface is spaced apart from the outer surface.

9. The battery cell of any of claims 1-8, wherein the flow guide channel comprises a flow guide slot disposed on a side of the current collecting member facing the first tab, the first central aperture communicating with the flow guide slot.

10. The battery cell as recited in claim 9, wherein the current collecting member comprises:

the body part is used for abutting against the end cover, and the first central hole is formed in the body part;

the two abutting parts are used for abutting against the first pole lug, the two abutting parts are arranged on one side of the body part deviating from the end cover in a protruding mode, the two abutting parts are respectively located on two sides of the first center hole in the radial direction, and the flow guide groove is formed between the two abutting parts.

11. The battery cell as recited in claim 10 wherein the abutments are "V" shaped, with two of the abutments facing away from each other.

12. The battery cell as recited in claim 10, wherein the first tab is welded to the abutment and forms a weld impression, the weld impression extending along a trajectory of the abutment.

13. The battery cell according to any one of claims 1 to 8, wherein the main body portion is provided with a second center hole that is disposed opposite to the first center hole in the axial direction of the first center hole.

14. A battery, comprising:

a battery cell of any one of claims 1-13;

and the box body is used for accommodating the battery monomer.

15. An electrical device comprising the battery of claim 14.