CN116666917A - Battery monomer, battery and power consumption device - Google Patents

Battery monomer, battery and power consumption device Download PDF

Info

Publication number
CN116666917A
CN116666917A CN202310532980.9A CN202310532980A CN116666917A CN 116666917 A CN116666917 A CN 116666917A CN 202310532980 A CN202310532980 A CN 202310532980A CN 116666917 A CN116666917 A CN 116666917A
Authority
CN
China
Prior art keywords
battery cell
cover plate
pole
housing
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310532980.9A
Other languages
Chinese (zh)
Inventor
杨光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanjun New Energy Technology Co ltd
Original Assignee
Lanjun New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lanjun New Energy Technology Co ltd filed Critical Lanjun New Energy Technology Co ltd
Priority to CN202310532980.9A priority Critical patent/CN116666917A/en
Publication of CN116666917A publication Critical patent/CN116666917A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The present application relates to a battery cell comprising: a case having an opening on one surface in a thickness direction; the battery cell assembly is accommodated in the shell and comprises a positive electrode lug and a negative electrode lug; a cover plate sealing the opening of the housing; the two pole column assemblies are distributed at two ends of the cover plate in the length direction, each pole column assembly comprises a connecting piece and a pole column, and the connecting piece penetrates through the positive pole lug or the negative pole lug and the cover plate in the thickness direction and extends out to one side of the cover plate, which is away from the shell; the pole is connected with one end of the connecting piece extending out of the cover plate, and the pole is mutually insulated from the cover plate. Because the connecting piece is adopted to penetrate through the positive electrode lug or the negative electrode lug of the battery cell assembly, the positive electrode lug or the negative electrode lug of the battery cell assembly is more convenient to connect with the electrode post, and the operation is simple. Two pole assemblies are distributed at two ends of the cover plate in the length direction, and the energy density of the battery cell is higher.

Description

Battery monomer, battery and power consumption device
Technical Field
The application relates to the technical field of new energy, in particular to a battery monomer, a battery and an electric device.
Background
At present, a cylindrical shell with two open ends is generally adopted as a battery cell with a long battery structure, a bare cell is opened from one end of the cylindrical shell and is then put into the shell, positive and negative lugs at two ends of the bare cell are respectively connected with positive and negative poles on two top cover components, and finally the two top cover components are respectively welded with two ends of the cylindrical shell. The long battery structure adopting the process has the problems of high cost, difficult shell entering, complex operation and the like. Firstly, in the battery cell with a long battery structure, the cylindrical shell has a longer length, the molding difficulty is extremely high, the manufacturing cost is high, the molding with an ultrathin wall thickness cannot be performed, and the material utilization rate is low. Secondly, during assembly, due to the structural limitation of the cylindrical shell, the travel of the bare cell entering the shell from the opening at one end of the cylindrical shell is large, and the bare cell is easily scratched in the shell entering process, so that the assembly difficulty is high and the efficiency is low. Finally, as the top cover component is arranged at the two ends of the cylindrical shell in a sealing way, the positive and negative electrode posts are positioned at the two ends of the battery cell in the length direction, the positive and negative electrode posts are inconvenient to connect with the positive and negative electrode lugs of the bare cell, and the process is complex; and the positive and negative poles occupy the space in the length direction of the battery cell, and the energy density of the battery cell is low.
Disclosure of Invention
In view of the above, it is necessary to provide a battery cell having a simple process and a high energy density.
A battery cell comprising:
a case having an opening on one surface in a thickness direction;
the battery cell assembly is accommodated in the shell and comprises a positive electrode lug and a negative electrode lug;
a cover plate sealing the opening of the housing; a kind of electronic device with high-pressure air-conditioning system
The two pole column assemblies are distributed at two ends of the cover plate in the length direction, each pole column assembly comprises a connecting piece and a pole column, and the connecting piece penetrates through the positive pole lug or the negative pole lug and the cover plate in the thickness direction and extends out to one side of the cover plate, which is away from the shell; the pole is connected with one end of the connecting piece extending out of the cover plate, and the pole is mutually insulated from the cover plate.
In one embodiment, two ends of the shell in the length direction are respectively provided with a step groove, the step grooves are positioned at the opening of the shell, and each step groove is arranged in an extending manner along the width direction of the shell; the cover plate comprises a main body part and mounting parts arranged at two ends of the main body part in the length direction, the main body part is matched with the opening end face of the shell, the two mounting parts are matched with the step faces of the step grooves of the shell, mounting spaces are respectively formed between the two mounting parts and the main body part, and the two pole column assemblies are respectively arranged on the two mounting parts and are positioned in the two mounting spaces.
In one embodiment, each of the pole assemblies further comprises an insulator and a sealing sleeve, the sealing sleeve is sleeved on the connector, and the insulator is sleeved on the connector and located between the pole and the cover plate.
In one embodiment, each of the pole assemblies further comprises a support member sleeved on the seal cartridge and located between the cover plate and the seal cartridge.
In one embodiment, each of the pole assemblies further includes a protective sheet, and the positive tab or the negative tab has two opposite planes, at least one of which is attached with the protective sheet.
In one embodiment, the battery pack further comprises a protection assembly, the protection assembly comprises a first protection plate, a second protection plate and two protection supports, the first protection plate is arranged in the shell and located between the battery pack and the bottom wall of the shell, the second protection plate is arranged between the battery pack and the cover plate, and the two protection supports are arranged in the shell and are respectively arranged on two sides of the length direction of the battery pack.
In one embodiment, each protection support comprises a protection main body and protection arms arranged at two ends of the protection main body in the length direction, each protection arm extends along the width direction of the protection main body, and an avoidance groove is formed in the position, corresponding to the positive electrode lug or the negative electrode lug, of the battery cell assembly.
In one embodiment, a side surface of the protective body, which is far away from the bottom wall of the shell, is provided with a plurality of weight-reducing grooves, and the weight-reducing grooves are arranged at intervals along the length direction of the protective body.
In one embodiment, the cover plate is provided with an explosion-proof valve, the explosion-proof valve comprises an explosion-proof main body, the explosion-proof main body comprises a first side and a second side which are oppositely arranged, a part of the explosion-proof main body protrudes along a direction from the first side to the second side to form a thickness reduction area, and the thickness of the thickness reduction area is smaller than that of the explosion-proof main body.
In one embodiment, the second side of the explosion proof body is disposed proximate the housing.
In one embodiment, the cover plate is provided with a sealing nail, the sealing nail comprises a sealing main body, the sealing main body comprises a third side and a fourth side which are oppositely arranged, the position of the sealing main body corresponding to the liquid injection hole is raised along the direction from the third side to the fourth side to form an avoidance part, the avoidance part stretches into the liquid injection hole, and the fourth side of the sealing main body is close to the shell.
According to the battery cell, when the battery cell is assembled, the positive electrode lug and the negative electrode lug of the battery cell assembly can be respectively penetrated through the two connecting pieces and are connected with the two electrode posts on one side, far away from the shell, of the cover plate. And the two pole assemblies are distributed at the two ends of the cover plate in the length direction, so that the two poles do not occupy the space of the battery monomer in the length direction, and the energy density of the battery monomer is higher. In addition, when the battery cell assembly is placed in the shell from the thickness direction of the battery cell, the shell entering travel of the battery cell assembly is short, the shell entering is simple, the battery cell assembly is not easy to scratch, and the shell entering efficiency is high. The shell is simple in molding, high in material utilization rate and low in manufacturing cost, and the manufactured shell can be ultra-thin in wall thickness.
In addition, the application also provides a battery and an electric device.
A battery comprising a plurality of cells as described in the preferred embodiments above.
An electrical device comprising a battery cell as described in the above preferred embodiments or a battery as described in the above preferred embodiments.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a battery cell according to a preferred embodiment of the present application;
FIG. 2 is a block diagram of the battery cell shown in FIG. 1;
FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2;
FIG. 4 is an enlarged schematic view of the structure within the circle of FIG. 3;
FIG. 5 is an exploded view of the housing, cover and bare cell of the battery cell of FIG. 1;
fig. 6 is a structural view of a case in the battery cell shown in fig. 1;
FIG. 7 is a block diagram of an explosion-proof valve in the battery cell shown in FIG. 1;
FIG. 8 is a cross-sectional view of the explosion valve shown in FIG. 7;
FIG. 9 is a block diagram of a protective bracket of the protective assembly of the battery cell of FIG. 1;
fig. 10 is a structural view of a seal nail in the battery cell shown in fig. 1;
fig. 11 is a cross-sectional view of the sealing spike of fig. 10.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The application discloses an electric device, a battery and a battery cell. The electric device can be a vehicle, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, energy storage equipment, recreation equipment, an elevator, lifting equipment and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, or an electric plane toy, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and the like; the energy storage device can be an energy storage wall, a base station energy storage, a container energy storage and the like; the amusement device may be a carousel, a stair jump machine, or the like. The present application does not particularly limit the above-described power consumption device.
For pure electric vehicles, the battery can be used as a driving power supply, so that the battery can replace fossil fuel to provide driving power.
The battery may be a battery pack or a battery module. When the battery is a battery pack, the battery pack specifically includes a Battery Management System (BMS) and a plurality of the battery cells. The battery management system is used for controlling and monitoring the working states of the battery monomers. In addition, a plurality of battery cells can be connected in series and/or in parallel and form a battery module together with a module management system, and then the battery modules are electrically connected in series, in parallel or in a mode of mixing the series and the parallel and form a battery pack together with the battery management system.
The battery pack or the battery module can be arranged on a supporting structure such as a box body, a frame and a bracket, and the battery cells can be electrically connected through a confluence part. The battery cell may be a lithium ion battery, a sodium ion battery or a magnesium ion battery, and its external contour may be a cylinder, a flat body, a cuboid or other shapes, but is not limited thereto. In this embodiment, the battery cell is a lithium ion prismatic battery.
Referring to fig. 1, 2 and 3, a battery cell 10 according to a preferred embodiment of the application includes a housing 100, a cell assembly 200, a cover 400 and a post assembly 500. The battery cell 10 has a length direction, a width direction and a thickness direction, the length of the battery cell 10 is far greater than the width of the battery cell 10, and the thickness of the battery cell 10 is smaller, so that the battery cell 10 is of a long battery structure as a whole.
The case 100 has a hollow structure having an accommodating space therein for accommodating the battery cell assembly 200, the electrolyte, and other components. The case 100 is provided with an opening (not shown) on one surface in the thickness direction, and the cell assembly 200 can be mounted in the case 100 through the opening of the case 100. Since the battery cell 10 in the present embodiment is a square battery, the outer contour of the case 100 has a rectangular parallelepiped shape.
Referring to fig. 6, in this embodiment, the housing 100 includes a bottom wall 140 and four sidewalls surrounding the bottom wall 140. The bottom wall 140 and the opening are disposed opposite to each other in the thickness direction of the housing 100, and the bottom wall 140 is the surface of the housing 100 having the largest area. Of the four side walls, two first side walls 120 are disposed opposite to each other in the width direction of the housing 100, and two second side walls 130 are disposed opposite to each other in the length direction of the housing 100.
The battery cell assembly 200 is a core member of the battery cell 10, and is housed in the case 100. To adapt to the shape of the housing 100, the cell assembly 200 in this embodiment has a rectangular parallelepiped shape. Wherein the cell assembly 200 comprises a bare cell.
Each cell assembly 200 may include one or more bare cells. The bare cell can be formed by a positive plate, a negative plate and a diaphragm with an insulating function between the negative plate and the positive plate in a winding or lamination mode, and the bare cell formed by winding can be pressed into a flat shape. In this embodiment, each of the battery cell assemblies 200 includes a bare battery cell having a positive tab 210 and a negative tab 220, and the positive tab 210 and the negative tab 220 are used for respectively leading out the positive tab and the negative tab. Specifically, in the present embodiment, the positive tab 210 and the negative tab 220 are located at two ends of the cell assembly 200 in the length direction.
The cover plate 400 is hermetically disposed at the opening of the case 100 to form a relatively closed environment inside the case 100, thereby isolating the cell assembly 200 from the external environment.
The cover plate 400 is also generally provided with a liquid injection hole (not shown) penetrating in the thickness direction, and the liquid injection hole is generally a circular hole. After the cover plate 400 seals the opening of the case 100, an electrolyte may be injected into the inside of the case 100 through the injection hole. After the injection is completed, the sealing nail 700 is welded on the cover plate 400 in a laser welding mode to seal the injection hole. The shape of the cover 400 is adapted to the shape of the opening of the housing 100, and in particular, in this embodiment, the cover 400 is substantially rectangular.
The cover plate 400 is also typically provided with an explosion-proof valve 600. When the gas pressure in the case 100 exceeds a threshold value, the explosion-proof valve 600 is opened to release the pressure in the case 100, thereby preventing the explosion of the battery cell 10. It is apparent that in other embodiments, the explosion proof valve 600 on the cover plate 400 may be omitted, and the explosion proof valve 600 may be provided at the side wall or the bottom wall of the case 100.
The two pole assemblies 500 are arranged at two ends of the cover plate 400 in the length direction, each pole assembly 500 comprises a connecting piece 510 and a pole 560, and the connecting piece 510 penetrates through the positive pole lug 210 or the negative pole lug 220 and the cover plate 400 in the thickness direction and extends out to one side of the cover plate 400 away from the shell 100. The pole 560 is connected to one end of the connecting member 510 extending out of the cover 400, and the pole 560 is insulated from the cover 400. In this way, the positive tab 210 of the bare cell is electrically connected to the post 560 of one of the post assemblies 500 through the connecting piece 510 of the post assembly 500, so that the post 560 of the post assembly 500 serves as the positive electrode of the battery cell 10; the negative electrode tab 220 of the bare cell is electrically connected with the electrode post 560 of the electrode post assembly 500 through the connection member 510 of the other electrode post assembly 500, so that the electrode post 560 of the electrode post assembly 500 serves as the negative electrode of the battery cell 10. That is, the posts 560 of the two post assemblies 500 serve as positive and negative terminals of the battery cells 10, respectively. Specifically, the post 560 as the positive electrode terminal may be an aluminum post, and the post 560 as the negative electrode terminal may be a copper post.
The positive electrode tab 210 and the negative electrode tab 220 of the bare cell are provided with through holes (not shown) in the thickness direction, and the cap plate 400 is provided with mounting holes (not shown) in the thickness direction. When the cover plate 400 is covered on the opening of the housing 100, the mounting holes are aligned with the through holes, and the connecting member 510 can sequentially pass through the through holes on the positive tab 210 or the negative tab 220 and the mounting holes on the cover plate 400 to extend above the cover plate 400 to be connected with the pole 560.
When the battery cell 10 is assembled, the two connecting pieces 510 respectively penetrate through the positive electrode lug 210 and the negative electrode lug 220 of the battery cell assembly 200 and are connected with the two electrode posts 560 positioned on one side of the cover plate 400 away from the shell 100. And the two pole assemblies 500 are distributed at both ends of the cover plate 400 in the length direction, so that the two poles 560 do not occupy the space of the battery cell 10 in the length direction, and the energy density of the battery cell 10 is higher. In addition, when the battery cell assembly 200 is placed in the shell 100 from the thickness direction of the battery cell 10, the shell entering travel of the battery cell assembly 200 is short, the shell entering is simple, the battery cell assembly 200 is not easy to scratch, and the shell entering efficiency is high. The shell 100 is simple to mold, high in material utilization rate and low in manufacturing cost, and the manufactured shell 100 can have ultrathin wall thickness.
Referring to fig. 5 and 6, the two ends of the housing 100 in the length direction are respectively provided with a step groove 110, and the step grooves 110 are located at the opening of the housing 100, and each step groove 110 extends along the width direction of the housing 100. The cap plate 400 includes a body part 410 and mounting parts 430 provided at both ends of the body part 410 in the length direction, the body part 410 is fitted with the opening end surface of the case 100, the two mounting parts 430 are fitted with the step surfaces 111 of the two step grooves 110 of the case 100, mounting spaces are respectively formed between the two mounting parts 430 and the body part 410, and the two pole assemblies 500 are respectively provided on the two mounting parts 430 and in the two mounting spaces. In this way, the two pole assemblies 500 can be accommodated in the installation spaces of the two ends of the cover plate 400 in the length direction, so that the battery cells 10 occupy a small space, and are convenient for being arranged into groups among the plurality of battery cells 10.
In particular, in the present embodiment, the two ends of the main body portion 410 of the cover plate 400 in the length direction may be formed into the mounting portions 430 by bending, each mounting portion 430 is connected to the main body portion 410 by one connecting portion 420, each mounting portion 430 is parallel to the main body portion 410, and two ends of each connecting portion 420 are perpendicular to the main body portion 410 and the corresponding mounting portion 430. The main body 410, the connecting portion 420, and the mounting portion 430 are integrally formed. The two pole assemblies 500 are respectively received in the two mounting spaces, and each pole assembly 500 does not protrude from a surface of the cap plate 400 remote from the housing 100, in other words, each pole assembly 500 does not protrude from an upper surface of the cap plate 400. Thus, the six faces of the battery cells 10 have no protruding structure, are relatively flat, and are beneficial to being arranged into groups among the battery cells 10.
Specifically, the step groove 110 is located at the opening of the housing 100, and the step groove 110 includes a step surface 111 and a connection surface 112 connected to the step surface 111 and the opening end surface of the housing 100. When the cover 400 is closed to the opening of the housing 100, the main body 410 of the cover 400 is attached to the opening end surface of the housing 100, the connection portion 420 of the cover 400 is attached to the connection surface 112 of the stepped groove 110, and the mounting portion 430 of the cover 400 is attached to the stepped surface 111 of the stepped groove 110. Thus, the cover plate 400 is tightly matched with the shell 100, so that the cover plate 400 and the shell 100 can be welded conveniently.
Referring to fig. 1 and 4, each pole assembly 500 further includes an insulating member 550 and a sealing sleeve 530, the sealing sleeve 530 is sleeved on the connecting member 510, one end of the sealing sleeve 530 extends into the mounting hole of the cover plate 400, and the insulating member 550 is sleeved on the connecting member 510 and is located between the pole 560 and the cover plate 400. Of course, in other embodiments, the sealing sleeve 530 is sleeved on the connecting member 510 and does not extend into the mounting hole of the cover plate 400, the insulating member 550 is sleeved on the connecting member 510 and is located between the pole 560 and the cover plate 400, and at least part of the insulating member 550 extends into the mounting hole of the cover plate 400. The insulator 550 may be molded of an insulating material such as plastic, rubber, or the like.
Thus, the sealing sleeve 530 may seal the gap between the connection member 510 and the cap plate 400 such that the electrolyte does not permeate out of the gap between the connection member 510 and the cap plate 400. The sealing sleeve 530 may also function as an insulating connector 510 and cover plate 400. The insulator 550 may function to insulate the post 560 and the cap plate 400. In this way, the electrode post 560 is prevented from being electrically connected to the cap plate 400, resulting in a short circuit of the battery cell 10.
In this embodiment, a groove is formed on the side of the insulator 550 away from the cover plate 400, and the pole 560 is disposed in the groove. Because the insulating member 550 is provided with the recess in one side of keeping away from the apron 400, the insulating member 550 is the box form of one end open-ended, and the utmost point post 560 can imbed in the recess of insulating member 550 so that the side of utmost point post 560 is wrapped up by insulating member 550, and thus, insulating member 550 is better to insulating effect between utmost point post 560 and the apron 400.
In this embodiment, each pole assembly 500 further includes a support member 540, and the support member 540 is sleeved on the sealing sleeve 530 and is located between the cover plate 400 and the sealing sleeve 530. Because the sealing sleeve 530 is made of a soft material, the supporting member 540 can be used to support the sealing sleeve 530 between the cover plate 400 and the sealing sleeve 530, so as to prevent the sealing sleeve 530 from being deformed under force to cause the failure of sealing the gap between the connecting member 510 and the cover plate 400. Specifically, the sealing sleeve 530 includes a cylindrical body (not shown) that is sleeved on the connecting member 510, and a plate body (not shown) disposed at one end of the cylindrical body, where one end of the cylindrical body far from the plate body extends into the mounting hole of the cover plate 400. One end of the supporting member 540 is abutted to the cover plate 400, and the other end of the supporting member 540 is abutted to the plate body.
In this embodiment, each of the pole assemblies 500 further includes a protective sheet 520, and the positive tab 210 or the negative tab 220 has two opposite planes, and at least one of the two planes is attached with the protective sheet 520. Preferably, the protection sheet 520 is attached to both planes of the positive electrode tab 210 or the negative electrode tab 220. Since the material of the positive electrode tab 210 or the negative electrode tab 220 is softer, the through Kong Shouli on the positive electrode tab 210 or the negative electrode tab 220 is easily torn, and the protective sheet 520 is attached to the plane of the positive electrode tab 210 or the negative electrode tab 220, and the protective sheet 520 is made of a harder metal, for example, aluminum, so that the tearing of the positive electrode tab 210 or the negative electrode tab 220 caused when the connecting member 510 passes through the through hole of the positive electrode tab 210 or the negative electrode tab 220 can be prevented. Specifically, the connecting member 510 includes a cylinder (not shown) and a limiting body (not shown) disposed at one end of the cylinder, wherein one of the protecting sheets 520 may be sleeved on the cylinder in advance, such that the protecting sheet 520 abuts against the limiting body, then the protecting sheet 520 is welded with the connecting member 510 into a whole, then the cylinder is passed through the through hole of the positive tab 210 or the negative tab 220, such that the protecting sheet 520 is attached to one of the planes of the positive tab 210 or the negative tab 220, the other protecting sheet 520 is sleeved on the cylinder and attached to the other plane of the positive tab 210 or the negative tab 220, and finally the other protecting sheet 520 is welded with the connecting member 510 into a whole. Thus, the two protection sheets 520 and the positive electrode tab 210 or the negative electrode tab 220 can be integrated into a whole, so that the positive electrode tab 210 or the negative electrode tab 220 is well protected. In other embodiments, the two protection sheets 520 may be welded to two planes of the positive electrode tab 210 or the negative electrode tab 220, respectively, to form an integrated structure, and then the cylinder may be passed through the integrated structure.
Referring to fig. 1 and 4, the battery cell 10 further includes a protection assembly 300, and the protection assembly 300 includes a first protection plate 310, a second protection plate 330, and two protection supports 320. The first protection plate 310 is disposed in the housing 100 and located between the cell assembly 200 and the bottom wall of the housing 100, and is used for protecting a large surface of the cell assembly 200, which is close to the housing 100, and insulating the cell assembly 200 from the housing 100. The second protection plate 330 is disposed between the battery cell assembly 200 and the cover plate 400, and is used for protecting a large surface of the battery cell assembly 200 away from the housing 100 and insulating the battery cell assembly 200 from the cover plate 400. The two protection brackets 320 are disposed in the housing 100 and are disposed on two sides of the length direction of the battery cell assembly 200, and the two protection brackets 320 are respectively used for protecting the positive electrode lug 210 and the negative electrode lug 220 of the battery cell assembly 200 and insulating the four side walls of the battery cell assembly 200 and the housing 100. Thus, the lower surface of the battery cell assembly 200 can be prevented from being scratched and insulated from the bottom wall of the housing 100 by the first protection plate 310, the upper surface of the battery cell assembly 200 can be prevented from being scratched and insulated from the cover plate 400 by the second protection plate 330, the anode lug 210 and the cathode lug 220 can be prevented from being damaged due to collision between the two ends of the battery cell assembly 200 in the length direction and the housing 100, and the battery cell assembly 200 is not easy to be damaged due to collision between the two ends of the battery cell assembly 200 in the length direction and the housing 100, and the insulation is performed between the battery cell assembly 200 and the four side walls of the housing 100, so that the battery cell assembly 200 can be protected and insulated in all directions.
Referring to fig. 9, each protection support 320 includes a protection main body 321 and protection arms 322 disposed at two ends of the protection main body 321 in the length direction, each protection arm 322 extends along the width direction of the protection main body 321, and the protection main body 321 is provided with a avoidance groove 3211 corresponding to the position of the positive electrode tab 210 or the negative electrode tab 220 of the battery cell assembly 200. During practical use, the two protection arms 322 are inserted between the battery cell assembly 200 and the two first side walls 120 of the housing 100, and the protection main body 321 is located between the battery cell assembly 200 and the second side wall 130 of the housing 100, and the positive tab 210 or the negative tab 220 of the battery cell assembly 200 correspondingly extends into the avoidance groove 3211 of the protection main body 321, so that a certain limiting effect and a certain protection effect can be achieved on the battery cell assembly 200, so that the position of the battery cell assembly 200 relative to the housing 100 is more accurate, and the positive tab 210 or the negative tab 220 of the battery cell assembly 200 is not easily damaged, thereby improving the reliability of the battery cell 10.
Further, a side surface of the protective body 321 far from the bottom wall of the housing 100 is provided with a plurality of weight-reducing grooves 3212, and the plurality of weight-reducing grooves 3212 are arranged at intervals along the length direction of the protective body 321. In this way, the structural strength of the protection body 321 is not affected, and the protection body 321 can be reduced in weight, so that the battery cell 10 can be reduced in weight.
Referring to fig. 7 and 8, the explosion-proof valve 600 includes an explosion-proof body 610, the explosion-proof body 610 includes a first side and a second side disposed opposite to each other, a portion of the explosion-proof body 610 is protruded along a direction from the first side to the second side to form a thickness-reduced area 620, and the thickness-reduced area 620 is in a bulge shape. As such, when the gas pressure in the case 100 exceeds the threshold value, the reduced thickness region 620 of the explosion-proof valve 600 is exploded to release the pressure in the case 100, thereby preventing the explosion of the battery cell 10. In particular to the embodiment shown in fig. 8, the first side of the explosion-proof body 610 refers to the upper surface of the explosion-proof body 610, and the second side of the explosion-proof body 610 refers to the lower surface of the explosion-proof body 610.
It will be appreciated that the thickness of the flameproof body 610 is uniform, and when the flameproof body 610 is pit punched, the thickness of the thinned region 620 is more easily blasted because the part of the flameproof body 610 is stretched to be thinned to form the bulged thickness thinned region 620, and the thickness of the thickness thinned region 620 is smaller than the thickness of the flameproof body 610.
Further, the thickness reduction regions 620 may be plural, and the thickness reduction regions 620 may be uniformly disposed on the explosion-proof body 610, for example, may be disposed at intervals along the length direction of the explosion-proof body 610. The number of the thickness reduction regions 620 may be two, three, four, etc., and is not limited herein. As such, when one of the reduced thickness regions 620 fails, the other reduced thickness regions 620 may also be blasted.
Preferably, the second side of the explosion proof body 610 is disposed proximate to the housing 100. In this way, the reduced thickness region 620 of the explosion-proof body 610 does not protrude from the explosion-proof body 610, and is not accidentally exploded by external impact.
Referring to fig. 10 and 11, the sealing nail 700 includes a sealing body 710, the sealing body 710 includes a third side and a fourth side that are disposed opposite to each other, the sealing body 710 is raised along a direction from the third side to the fourth side to form a relief portion 720, and the fourth side of the sealing body 710 is disposed near the housing 100. In this way, the avoiding portion 720 of the sealing nail 700 can extend into the liquid injection hole, so that the electrolyte is prevented from leaking due to rupture caused by external impact. In particular to the embodiment shown in fig. 11, the third side of the sealing body 710 refers to the upper surface of the sealing body 710 and the fourth side of the sealing body 710 refers to the lower surface of the sealing body 710.
In the above-mentioned battery cell 10, when the battery cell 10 is assembled, the two connecting pieces 510 respectively pass through the positive electrode tab 210 and the negative electrode tab 220 of the battery cell assembly 200 and are connected with the two electrode posts 560 located on the side of the cover plate 400 far away from the housing 100. And the two pole assemblies 500 are distributed at both ends of the cover plate 400 in the length direction, so that the two poles 560 do not occupy the space of the battery cell 10 in the length direction, and the energy density of the battery cell 10 is higher. In addition, when the battery cell assembly 200 is placed in the shell 100 from the thickness direction of the battery cell 10, the shell entering travel of the battery cell assembly 200 is short, the shell entering is simple, the battery cell assembly 200 is not easy to scratch, and the shell entering efficiency is high. The shell 100 is simple to mold, high in material utilization rate and low in manufacturing cost, and the manufactured shell 100 can have ultrathin wall thickness.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (13)

1. A battery cell, comprising:
a case having an opening on one surface in a thickness direction;
the battery cell assembly is accommodated in the shell and comprises a positive electrode lug and a negative electrode lug;
a cover plate sealing the opening of the housing; a kind of electronic device with high-pressure air-conditioning system
The two pole column assemblies are distributed at two ends of the cover plate in the length direction, each pole column assembly comprises a connecting piece and a pole column, and the connecting piece penetrates through the positive pole lug or the negative pole lug and the cover plate in the thickness direction and extends out to one side of the cover plate, which is away from the shell; the pole is connected with one end of the connecting piece extending out of the cover plate, and the pole is mutually insulated from the cover plate.
2. The battery cell according to claim 1, wherein both ends of the housing in a length direction are respectively provided with step grooves at an opening of the housing, each of the step grooves extending in a width direction of the housing; the cover plate comprises a main body part and mounting parts arranged at two ends of the main body part in the length direction, the main body part is matched with the opening end face of the shell, the two mounting parts are matched with the step faces of the step grooves of the shell, mounting spaces are respectively formed between the two mounting parts and the main body part, and the two pole column assemblies are respectively arranged on the two mounting parts and are positioned in the two mounting spaces.
3. The battery cell of claim 1, wherein each of the post assemblies further comprises an insulator and a sealing sleeve, the sealing sleeve is sleeved on the connector, and the insulator is sleeved on the connector and is positioned between the post and the cover plate.
4. The battery cell of claim 3, wherein each of the post assemblies further comprises a support member that is nested within the sealing sleeve and between the cover plate and the sealing sleeve.
5. The battery cell of claim 1, wherein each of the post assemblies further comprises a protective sheet, the positive tab or the negative tab has two opposing planar surfaces, and at least one of the planar surfaces is affixed with the protective sheet.
6. The battery cell of claim 1, further comprising a protective assembly comprising a first protective plate, a second protective plate, and two protective brackets, the first protective plate being disposed in the housing and between the cell assembly and the bottom wall of the housing, the second protective plate being disposed between the cell assembly and the cover plate, the two protective brackets being disposed in the housing and disposed on both sides of the cell assembly in a length direction.
7. The battery cell according to claim 6, wherein each of the protection brackets includes a protection body and protection arms provided at both ends of the protection body in a length direction, each of the protection arms is provided to extend in a width direction of the protection body, and a recess is provided at a position of the protection body corresponding to the positive tab or the negative tab of the battery cell assembly.
8. The battery cell as recited in claim 7, wherein a side surface of the protective body away from the bottom wall of the housing is provided with a plurality of weight-reducing grooves, the plurality of weight-reducing grooves being disposed at intervals along a length direction of the protective body.
9. The battery cell of claim 1, wherein the cover plate is provided with an explosion-proof valve, the explosion-proof valve comprises an explosion-proof body, the explosion-proof body comprises a first side and a second side which are oppositely arranged, a part of the explosion-proof body protrudes along a direction from the first side to the second side to form a thickness reduction area, and the thickness of the thickness reduction area is smaller than that of the explosion-proof body.
10. The battery cell of claim 9, wherein the second side of the explosion-proof body is disposed proximate the housing.
11. The battery cell according to claim 1, wherein the cover plate is provided with a sealing nail, the sealing nail comprises a sealing main body, the sealing main body comprises a third side and a fourth side which are oppositely arranged, the sealing main body is protruded along the direction from the third side to the fourth side to form an avoidance part, the avoidance part extends into the liquid injection hole, and the fourth side of the sealing main body is arranged close to the shell.
12. A battery comprising a plurality of cells according to any one of claims 1 to 11.
13. An electrical device comprising a battery cell according to any one of claims 1 to 11 or a battery according to claim 12.
CN202310532980.9A 2023-05-10 2023-05-10 Battery monomer, battery and power consumption device Pending CN116666917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310532980.9A CN116666917A (en) 2023-05-10 2023-05-10 Battery monomer, battery and power consumption device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310532980.9A CN116666917A (en) 2023-05-10 2023-05-10 Battery monomer, battery and power consumption device

Publications (1)

Publication Number Publication Date
CN116666917A true CN116666917A (en) 2023-08-29

Family

ID=87723301

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310532980.9A Pending CN116666917A (en) 2023-05-10 2023-05-10 Battery monomer, battery and power consumption device

Country Status (1)

Country Link
CN (1) CN116666917A (en)

Similar Documents

Publication Publication Date Title
CN216054941U (en) Battery cell, battery and electric equipment
CN216213729U (en) Battery monomer, battery and consumer
CN216213726U (en) Battery cell, battery, electric device, and apparatus for manufacturing battery cell
CN220253338U (en) Shell assembly, battery monomer, battery and power utilization device
CN219498088U (en) Electrode assembly, battery cell, battery and electricity utilization device
CN220066045U (en) Battery monomer, battery and power consumption device
CN220065857U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN116666917A (en) Battery monomer, battery and power consumption device
CN219497946U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN219873760U (en) Battery monomer, battery and power consumption device
CN220253344U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN219575884U (en) Battery monomer, battery and power consumption device
CN220066047U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN219497947U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN220065865U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN220066023U (en) Battery monomer, battery and power consumption device
CN220253380U (en) Battery monomer, battery and power consumption device
CN220065932U (en) Battery shell, battery unit, battery and electricity utilization device
CN220066000U (en) Battery monomer, battery and power consumption device
CN114696012A (en) Battery cell, method for manufacturing same, battery, and electric device
CN219575769U (en) Shell, battery monomer, battery and power consumption device
CN220066064U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN219717213U (en) Top cover assembly, battery cell, battery and electricity utilization device
CN219498103U (en) Battery monomer, battery and power consumption device
CN220253347U (en) Top cover assembly, battery cell, battery and electricity utilization device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination