CN116914336B - Single battery, energy storage device and electric equipment - Google Patents
Single battery, energy storage device and electric equipment Download PDFInfo
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- CN116914336B CN116914336B CN202311148733.5A CN202311148733A CN116914336B CN 116914336 B CN116914336 B CN 116914336B CN 202311148733 A CN202311148733 A CN 202311148733A CN 116914336 B CN116914336 B CN 116914336B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 84
- 238000003780 insertion Methods 0.000 claims abstract description 34
- 230000037431 insertion Effects 0.000 claims abstract description 34
- 230000002093 peripheral effect Effects 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 15
- 239000002184 metal Substances 0.000 abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
-
- 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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a single battery, an energy storage device and electric equipment, which comprises the following components: the shell is provided with a mounting port; the end cover assembly is used for closing the mounting opening, the end cover assembly is provided with a plug-in step, the plug-in step is suitable for being plugged into the mounting opening, the plug-in step is provided with a pressing convex part, the pressing convex part is arranged on the peripheral wall of the plug-in step in a protruding manner, and the pressing convex part is suitable for being in pressing fit with the inner wall of the mounting opening; the insertion step is configured as a disc-shaped step with a circular ring-shaped outer peripheral surface, and the radial dimension of the insertion step is configured to gradually decrease along the axial direction of the insertion step towards the direction in the shell; the pressing convex part is in a strip shape, and the side surface of the pressing convex part, which is away from the inserting step, is in a circular arc shape. According to the single battery, the contact area of the pressing convex part and the shell is smaller, the length of the cut metal wire can be effectively reduced, the problem of internal short circuit caused by the metal wire is avoided, and the overall safety of the battery is improved.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a single battery, an energy storage device with the single battery and electric equipment with the energy storage device.
Background
In the related art, the cylindrical battery includes an aluminum case and a top cap assembly including parts such as a light aluminum sheet, a lower plastic, a current collecting plate, a pole, and the like. Wherein, the open mouth department of top cap installation aluminum hull, but at top cap and aluminum hull assembly's in-process, because the open mouth of aluminum hull does not have the fillet comparatively sharp, go into the very easy wire that produces of shell assembly process, and the length of wire is uncontrollable, if produce the wire and fall into inside the electric core to overlap joint negative pole current collecting plate and top cap light aluminum sheet at the nearest distance, will produce the short circuit, there is the risk of electric core inefficacy explosion.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a single battery, and the end cover assembly is not easy to generate metal wires when being connected with the shell, so that the safety is high.
The single battery according to the embodiment of the invention comprises: the shell is provided with a mounting port; the end cover assembly is used for sealing the mounting opening, the end cover assembly is provided with an inserting step, the inserting step is suitable for being inserted into the mounting opening, the inserting step is provided with a pressing convex part, the pressing convex part is arranged on the outer peripheral wall of the inserting step in a protruding mode, and the pressing convex part is suitable for being in pressing fit with the inner wall of the mounting opening; wherein the insertion step is configured as a disc-shaped step having a circular ring-shaped outer peripheral surface, and the radial dimension of the insertion step is configured to gradually decrease in the axial direction of the insertion step toward the inside of the housing; the pressing convex part is in a strip shape and extends along the axial direction of the inserting step at the peripheral wall of the inserting step, and the side surface of the pressing convex part, which is away from the inserting step, is in a circular arc shape; the arc-shaped surface of the pressing convex part is provided with a top line, and the distance from the top line to the axis of the inserting step is gradually reduced along the axial direction of the inserting step towards the direction approaching to the inside of the shell.
According to the single battery disclosed by the embodiment of the invention, the pressing convex part is arranged on the outer peripheral wall of the plugging step, and is contacted with the inner peripheral wall of the mounting port through the pressing convex part protruding out of the plugging step, so that the contact area of the pressing convex part and the shell is smaller compared with that of the contact area of the outer peripheral wall of the plugging step and the inner peripheral wall of the mounting port, the cutting area is reduced in the contact process of the pressing convex part and the shell, the length of a cut metal wire can be effectively reduced, the problem of internal short circuit caused by the metal wire is avoided, and the overall safety and reliability of the battery are improved.
According to some embodiments of the invention, the number of the pressing protrusions is plural, and the plurality of the pressing protrusions are distributed at intervals along the circumferential direction on the outer circumferential wall of the plugging step, so that the interval distance between the pressing protrusions is the same.
According to some embodiments of the invention, a distance between top lines of two adjacent pressing protrusions at one end close to the inside of the case is L1, and a distance between top lines at one end far from the inside of the case is L2, and the following conditions are satisfied: l1 is less than or equal to 1.38mm and less than or equal to 1.42mm, L2 is less than or equal to 1.78mm and less than or equal to 1.82mm.
According to the single battery of some embodiments of the present invention, the plurality of pressing protrusions are uniformly spaced apart in the circumferential direction of the insertion step.
According to some embodiments of the invention, the end cover assembly comprises an end plate, a lower plastic and a current collecting disc, wherein the lower plastic is arranged on one side of the end plate facing into the shell, one end of the current collecting disc is connected with a pole, the pole penetrates through the lower plastic and the end plate, the other end of the current collecting disc is used for being connected with a battery cell, and the inserting step is arranged on one side of the end plate facing into the shell.
According to some embodiments of the invention, the lower plastic and the end plate are provided with liquid injection ports, the current collecting disc is attached to the lower plastic, the current collecting disc is suitable for being connected with the battery cell after being bent for a plurality of times relative to the pole, and the part of the current collecting disc bent at one time is distributed in a staggered manner with the liquid injection ports.
The invention further provides an energy storage device.
According to the energy storage device provided by the embodiment of the invention, the single battery is provided.
The invention also provides electric equipment.
According to the electric equipment provided by the embodiment of the invention, the energy storage device is arranged.
The electric equipment, the energy storage device and the single battery have the same advantages compared with the prior art, and are not described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of an end cap assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an end plate according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of an end plate according to an embodiment of the invention;
FIG. 4 is a schematic structural view (another perspective) of an end cap assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a unit cell according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a powered device according to an embodiment of the present invention.
Reference numerals:
the unit cells 1000 are formed in a state,
the end cover assembly 100, the end plate 1, the plug-in step 11, the pressing convex part 12, the lower plastic 2, the current collecting disc 3, the pole 4, the liquid injection port 5, the top line 6,
the housing 200 is configured to be positioned in a closed position,
energy storage device 1001, consumer 1002.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, 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 invention 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 invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following describes a unit cell according to an embodiment of the present invention with reference to fig. 1 to 5, in which the outer peripheral wall of the insertion step 11 of the end cap assembly 100 of the unit cell is provided with a pressing protrusion 12, and the pressing protrusion 12 may make pressing contact with the case 200, so as to reduce the contact area between the insertion step 11 and the case 200, thereby reducing the amount of wire generated during the contact process between the insertion step 11 and the case 200, reducing the length of the wire, avoiding the occurrence of an internal short circuit condition of the cell, and improving the safety of the cell.
As shown in fig. 1 to 5, according to an embodiment of the present invention, the unit cell includes a case 200 and an end cap assembly 100, the end cap assembly 100 is adapted to be connected to the case 200 of the battery, wherein a mounting cavity is formed in the case 200, a battery cell is mounted in the mounting cavity, the case 200 is provided with a mounting port communicating with the mounting cavity, the battery cell is adapted to be mounted into the mounting cavity from the mounting port, and the end cap assembly 100 is adapted to close the mounting port of the case 200 so that the inside of the mounting cavity is in a relatively closed state.
The end cover assembly 100 is provided with a plug-in step 11, the plug-in step 11 is suitable for being plugged into the mounting opening, the plug-in step 11 is provided with a pressing convex part 12, the pressing convex part 12 is arranged in a protruding mode on the outer peripheral wall of the plug-in step 11, and the pressing convex part 12 is suitable for being in pressing fit with the inner wall of the mounting opening. It should be noted that, the whole end cover assembly 100 may be configured in a plate shape, and the insertion step 11 is protruded on one side of the end cover assembly 100, so that the insertion step 11 corresponds to a step structure formed on a surface of one side of the end cover assembly 100, and the insertion step 11 is used for being in insertion fit with the mounting opening of the housing 200, that is, the shape of the insertion step 11 may be adapted to the shape of the mounting opening, for example, the mounting opening is configured as a circular opening, and the insertion step 11 may be configured as a disc shape, so that the insertion step 11 is inserted into the mounting opening to achieve insertion fit.
As shown in fig. 1 and 4, the insertion step 11 is provided at one side of the end cap assembly 100 and protrudes at one side of the end cap assembly 100, so that when the end cap assembly 100 is fixedly connected with the housing 200, at least part of the insertion step 11 is inserted into the mounting opening, and after entering the mounting opening, most of the outer peripheral wall of the insertion step 11 is spaced apart from the inner peripheral wall of the mounting opening, so that the tooth top of the pressing protrusion 12 is pressed against the inner wall of the mounting opening, thereby greatly reducing the contact area between the insertion step 11 and the housing 200.
It should be noted that, the housing 200 of the battery in the present invention may be made of an aluminum material, and no sliding fillet is formed at the axial edge of the mounting opening of the housing 200, so that a wire is easily generated when the housing is mated with the mating step 11, and the present invention provides the pressing protrusion 12 to contact the inner peripheral wall of the mounting opening. In other words, when actually installing, the end cover assembly 100 in the conventional technology is plugged with the installation port of the housing 200 through the plugging step 11, and the outer peripheral wall of the plugging step 11 is in abutting contact with the inner peripheral wall of the installation port, in this application, the convex abutting convex part 12 is arranged on the outer peripheral wall of the plugging step 11, and the abutting convex part 12 is in contact with the inner peripheral wall of the installation port, so that the contact area between the two is greatly reduced, the length of the metal wire which can be generated is reduced, the risk that the anode current collecting disc 3 and the end plate 1 which are caused by the metal wire overlap and short-circuit occur is reduced, the failure explosion of the battery core is prevented, and the internal safety of the battery is improved.
According to the single battery of the embodiment of the invention, the pressing convex part 12 is arranged on the outer peripheral wall of the plugging step 11 of the end cover assembly 100, so that the contact area between the pressing convex part 12 and the shell 200 is smaller, the length of a cut metal wire can be reduced, the problem of internal short circuit caused by the metal wire is avoided, and the overall safety and reliability of the battery are improved.
In some embodiments, the plugging step 11 is configured as a disc-shaped step having a circular ring-shaped outer circumferential surface, and it should be noted that the end cap assembly 100 of the present invention is applicable to a cylindrical battery, and the housing 200 of the cylindrical battery is a cylindrical housing, and the mounting opening of the housing 200 is a circular opening, so that the circular step can be plugged into the circular opening, and effective connection of the end cap assembly 100 and the housing 200 is achieved.
The plugging step 11 is configured as a disc-shaped step, that is, the plugging step 11 has a radial dimension and an axial dimension, as shown in fig. 2, the radial dimension is a width dimension of the plugging step 11, the axial dimension is a thickness dimension of the plugging step 11, and the radial dimension of the plugging step 11 is configured to gradually decrease in a direction approaching the inside of the housing 200 along the axial direction of the plugging step 11, that is, in the thickness direction of the plugging step 11, the radial dimension of the plugging step 11 gradually increases, and the whole is similar to a truncated cone structure. As shown in fig. 2, the plugging step 11 is provided at the lower side of the end cap assembly 100, and the mounting port may be provided at the upper end of the housing 200, the plugging step 11 is adapted to be plugged into the mounting port from top to bottom, and the direction along the axial direction of the plugging step 11 toward the inside of the housing 200 is from top to bottom, in other words, the radial dimension of the plugging step 11 is configured to gradually decrease from top to bottom, that is, the outer peripheral wall of the plugging step 11 is configured to be an annular curved surface and to be inclined to decrease in the axial direction.
Therefore, when the end cover assembly 100 and the shell 200 are connected in a plugging manner, one end of the plugging step 11 with smaller radial dimension is plugged into the mounting opening more easily, and the pressing convex part 12 and the inner peripheral wall of the mounting opening are gradually pressed with the increase of the plugging depth, so that the assembly of the end cover assembly 100 and the shell 200 is more compact, and the stable mounting of the battery is realized. Meanwhile, it should be noted that the radial dimension of the lower end of the plugging step 11 is smaller, so that the plugging step 11 can be quickly plugged into the mounting port, the mounting efficiency is improved, the risk that metal wires are generated by extrusion cutting of the inner walls of the plugging step 11 and the mounting port is reduced, and the safety of battery mounting is improved.
In some embodiments, the pressing projection 12 is configured in a strip shape and is arranged to extend in the axial direction of the insertion step 11 at the outer peripheral wall of the insertion step, and the side surface of the pressing projection 12 facing away from the insertion step 11 is configured as a circular arc surface. As shown in fig. 2 and 3, the pressing convex portion 12 is configured in a long strip shape, and the tooth surface of the pressing convex portion 12 is a semicircular surface, so that the outer surface of the pressing convex portion 12 is a smooth curved surface.
And, the circular arc surface of the pressing protrusion 12 has the top line 6, so that when the end cover assembly 100 and the housing 200 are connected and fixed, the actual contact area of the pressing protrusion 12 and the inner peripheral wall of the mounting opening is on the top line 6 of the pressing protrusion 12, thereby further reducing the contact area of the plugging step 11 and the housing 200, reducing the length of the metal wire and reducing the risk of short circuit. It should be noted that, the pressing protrusion 12 may be integrally configured with a tooth-like structure having an arc-shaped outer wall surface, that is, the pressing protrusion 12 has a smooth outer wall surface, as shown in fig. 3, the top line 6 is a line connecting each vertex of the side surface of the pressing protrusion 12 facing away from the plugging step 11, and the top line 6 is a line contacting the inner peripheral wall of the mounting hole.
In a further embodiment, the distance from the top line 6 of the pressing protrusion 12 to the axis of the insertion step 11 is set to gradually decrease in the axial direction of the insertion step 11 toward the inside of the housing 200, in other words, the top line 6 of the pressing protrusion 12 is also configured to extend obliquely in the axial direction of the insertion step 11 so that the tightness of the pressing protrusion 12 with the inner peripheral wall of the mounting port is also gradually increased, so that the deeper the insertion step 11 is inserted, the more stable the mounting.
Specifically, as shown in fig. 3, the interval between the upper end of the top line 6 of the pressing projection 12 and the axis of the insertion step 11 is large, and the interval between the lower end of the top line 6 of the pressing projection 12 and the axis of the insertion step 11 is small. In this way, the pressing protrusion 12 can be made to enter the mounting opening more easily, and as the insertion step 11 goes deep, the pressing protrusion 12 can be made to contact the inner peripheral wall of the mounting opening more steeply and compactly, wherein the top line 6 of the pressing protrusion 12 is an inclined line, so that no obvious cut wire appears when the pressing protrusion 12 enters the mounting opening from the edge of the mounting opening, and the length of the wire is greatly reduced.
In some embodiments, the number of the pressing protrusions 12 is plural, and the plurality of pressing protrusions 12 are distributed at intervals along the circumferential direction at the outer circumferential wall of the plugging step 11, so that the plurality of pressing protrusions 12 can respectively press-contact with the inner circumferential wall of the mounting port at different positions in the circumferential direction of the plugging step 11, thereby optimizing the conventional two-sided contact from the contact of the plurality of top wires 6 with the inner circumferential wall of the mounting port, and also reducing the contact area of the plugging step 11 with the housing 200.
Meanwhile, it should be noted that, the plurality of pressing protrusions 12 are provided, so that the end cover assembly 100 can be pressed and supported with the inner peripheral wall of the mounting opening through the pressing protrusions 12 at a plurality of positions in the circumferential direction, the supporting force at each position in the circumferential direction is ensured to be balanced relatively, the mounting stability of the end cover assembly 100 on the housing 200 is ensured, and the problems that the local position of the end cover assembly 100 is high and the local position is low are avoided.
In some embodiments, the distance of the top line 6 of the adjacent two pressing projections 12 near the one end within the housing 200 is L1, and the distance away from the one end within the housing 200 is L2, that is, as shown in fig. 3, the pitch between the apexes of the outer peripheral walls of the lower ends of the adjacent two pressing projections 12 is L1, the pitch between the apexes of the outer peripheral walls of the upper ends of the adjacent two pressing projections 12 is L2, that is, the pitch of the lower ends of the two pressing projections 12 is larger than the pitch of the upper ends, and the pitch of the two is gradually decreasing from the lower end to the upper end, and it is satisfied that: l1 is less than or equal to 1.38mm and less than or equal to 1.42mm, L2 is less than or equal to 1.78mm and less than or equal to 1.82mm.
Wherein, in actual design, can set up L1 to 1.42mm, L2 sets up to 1.8mm, from this, when installing grafting step 11 in casing 200, the area of pressing convex part 12 and the inner peripheral wall extrusion contact of installing port is littleer, and especially extrusion force is littleer when just inserting to avoid producing the great wire of length, improve battery safety.
In some embodiments, the plurality of pressing protrusions 12 are uniformly spaced apart in the circumferential direction of the plugging step 11, so that the spacing distance between the respective pressing protrusions 12 is the same, and thus the plurality of pressing protrusions 12 are in pressing contact with the inner circumferential wall of the mounting port at different positions, in other words, the size of the wire that can be generated can be reduced by the pressing protrusions 12 at each position in the circumferential direction of the plugging step 11, and the structural safety is more comprehensively improved.
As shown in fig. 2 and 3, the plurality of pressing protrusions 12 have the same shape and structure, have the same width in the circumferential direction, define a plurality of tooth grooves with the same width, realize clearance fit with the inner wall of the mounting opening at a plurality of positions, and reduce the contact area.
In some embodiments, the end cap assembly 100 includes an end plate 1, a lower plastic 2 and a current collecting plate 3, the lower plastic 2 is mounted on a side of the end plate 1 facing the inside of the housing 200, one end of the current collecting plate 3 is connected with a pole 4, the pole 4 is arranged through the lower plastic 2 and the end plate 1, and the other end of the current collecting plate 3 is used for being connected with a battery cell. When in actual installation, the lower plastic 2 and the end plate 1 are limited through the matching of the positioning holes and the positioning columns, one end of the current collecting disc 3 can be fixed with the pole 4 through ultrasonic welding, and the pole 4 is fixedly connected with the end plate 1, the lower plastic 2 and other parts in a riveting mode. The end plate 1 may be made of a photo-aluminum sheet.
Thus, when the end cover assembly 100 is mounted on the housing 200, the end plate 1 is mounted on the mounting opening of the housing 200, the lower plastic 2 is positioned on one side of the end plate 1 facing the housing 200, the current collecting plate 3 is positioned in the housing 200, one end of the pole 4 is positioned in the housing 200 to be connected with the current collecting plate 3, and the other end extends out of the housing 200. Wherein, the plugging step 11 is disposed on one side of the end plate 1 facing the housing 200, as shown in fig. 1, the plugging step 11 is disposed on the side of the end plate 1 matching with the lower plastic 2, and the outer diameter of the plugging step 11 is larger than that of the lower plastic 2, so that when the end cover assembly 100 is connected to the mounting opening, the lower plastic 2 extends into the mounting opening, and the end plate 1 is fixedly plugged into the housing 200 through the plugging step 11.
Wherein, through setting up end plate 1 that has to press convex part 12, can avoid the inner wall of installing port to produce a large amount of cuts to the periphery wall of end plate 1, reduce the production of wire, guarantee the structural stability of end plate 1.
In some embodiments, the lower plastic 2 and the end plate 1 are provided with a liquid injection port 5, the liquid injection port 5 penetrates through the lower plastic 2 and the end plate 1 and is used for injecting liquid towards the inside of the battery, the current collecting disc 3 is attached to the lower plastic 2, the current collecting disc 3 is suitable for being connected with the battery cell after being bent for a plurality of times relative to the pole 4, and the once bent part of the current collecting disc 3 is distributed in a staggered manner with the liquid injection port 5, so that the distance between the current collecting disc 3 and the liquid injection port 5 is larger, the overlapping of the current collecting disc 3 and the end plate 1 from the liquid injection port 5 by metal wires is avoided, and the structural safety is improved.
Specifically, as shown in fig. 1 and 4, the left end of the current collecting disc 3 is connected with the pole 4, and the left end portion of the current collecting disc 3 is attached to the lower plastic 2, the whole current collecting disc 3 extends towards the right relative to the pole 4, and meanwhile, the liquid injection port 5 is arranged at the left side of the pole 4, so that when the current collecting disc 3 is bent once, the space between the position of the primary bending and the liquid injection port 5 is large, the problem that the current collecting disc 3 and the end plate 1 are overlapped at the liquid injection port 5 through metal wires is difficult to occur, and meanwhile, when the current collecting disc 3 is bent twice or more times, the space between the current collecting disc 3 and the liquid injection port 5 is larger, and further, the situation of metal wire overlapping can be avoided, and the whole safety of the battery is improved.
The invention also provides an energy storage device 1001.
According to an energy storage device 1001 of an embodiment of the present invention, as shown in fig. 6, a single battery 1000 according to any of the embodiments described above is provided, where a plurality of single batteries 1000 may be provided in the energy storage device 1001, so that the plurality of single batteries 1000 are commonly used for storing electric energy. The energy storage device 1001 may be a battery pack, a storage battery, or the like. The above-mentioned single battery 1000 is provided, so that the risk of producing metal wires in the assembly process of the single battery 1000 is reduced, and the safety and reliability of the structure are improved.
The invention also provides electric equipment 1002.
According to the electric device 1002 provided by the embodiment of the present invention, the energy storage device 1001 is provided, so that the energy storage device 1001 can perform electric energy transmission for the electric device 1002, where the electric device 1002 can be a motor, an electric seat, or the like.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A single cell (1000), characterized by comprising:
the shell (200) is provided with an installation opening, and the shell (200) is made of a metal material;
the end cover assembly (100), the end cover assembly (100) is used for closing the mounting opening, the end cover assembly (100) is provided with a plug-in step (11), the plug-in step (11) is suitable for being plugged into the mounting opening, the plug-in step (11) is provided with a pressing convex part (12), the pressing convex part (12) is arranged on the peripheral wall of the plug-in step (11) in a protruding manner, and the pressing convex part (12) is suitable for being in pressing fit with the inner wall of the mounting opening;
the plug-in step (11) is configured as a disc-shaped step with a circular ring-shaped outer peripheral surface, the radial dimension of the plug-in step (11) is configured to gradually decrease along the axial direction of the plug-in step (11) towards the direction in the shell (200), the pressing convex part (12) is configured to be long-strip-shaped and is arranged on the outer peripheral wall of the plug-in step (11) along the axial extension of the plug-in step (11), the side surface of the pressing convex part (12) deviating from the plug-in step (11) is configured as a circular arc-shaped surface, the circular arc-shaped surface of the pressing convex part (12) is provided with a top line (6), and the distance from the top line (6) to the axis of the plug-in step (11) is configured to gradually decrease along the axial direction of the plug-in step (11) towards the direction in the shell (200).
2. The unit cell (1000) according to claim 1, wherein the plurality of pressing projections (12) are provided, and the plurality of pressing projections (12) are circumferentially spaced apart at the outer peripheral wall of the insertion step (11).
3. The unit cell (1000) according to claim 2, wherein a distance of a top line (6) of two adjacent pressing projections (12) near one end in the case (200) is L1, and a distance of an end away from the case (200) is L2, and is satisfied: l1 is less than or equal to 1.38mm and less than or equal to 1.42mm, L2 is less than or equal to 1.78mm and less than or equal to 1.82mm.
4. The unit cell (1000) according to claim 2, wherein a plurality of the pressing protrusions (12) are uniformly spaced apart in the circumferential direction of the insertion step (11) such that the spacing distance between the respective pressing protrusions (12) is the same.
5. The unit cell (1000) according to any of claims 1-4, wherein the end cap assembly (100) comprises an end plate (1), a lower plastic (2) and a current collecting plate (3), the lower plastic (2) is mounted on one side of the end plate (1) facing into the housing (200), one end of the current collecting plate (3) is connected with a pole (4), the pole (4) is arranged on the lower plastic (2) and the end plate (1) in a penetrating manner, the other end of the current collecting plate (3) is connected with a battery cell, and the plugging step (11) is arranged on one side of the end plate (1) facing into the housing (200).
6. The single battery (1000) according to claim 5, wherein the lower plastic (2) and the end plate (1) are provided with a liquid injection port (5), the current collecting disc (3) is attached to the lower plastic (2), the current collecting disc (3) is suitable for being connected with the battery cell after being bent for a plurality of times relative to the pole (4), and a part of the current collecting disc (3) bent once is distributed in a staggered manner with the liquid injection port (5).
7. An energy storage device (1001), characterized in that a single cell (1000) according to any one of claims 1-6 is provided.
8. A powered device (1002), characterized in that an energy storage device (1001) as claimed in claim 7 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311148733.5A CN116914336B (en) | 2023-09-07 | 2023-09-07 | Single battery, energy storage device and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311148733.5A CN116914336B (en) | 2023-09-07 | 2023-09-07 | Single battery, energy storage device and electric equipment |
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| CN116914336A CN116914336A (en) | 2023-10-20 |
| CN116914336B true CN116914336B (en) | 2024-01-23 |
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| CN215451574U (en) * | 2021-03-30 | 2022-01-07 | 合肥国轩高科动力能源有限公司 | Cylindrical battery cover plate |
| CN216389546U (en) * | 2021-12-10 | 2022-04-26 | 合肥国轩高科动力能源有限公司 | Electricity core apron structure |
| CN219066992U (en) * | 2022-09-26 | 2023-05-23 | 楚能新能源股份有限公司 | Cylindrical battery combined cover plate |
| CN219067002U (en) * | 2023-01-03 | 2023-05-23 | 楚能新能源股份有限公司 | Top cover structure of cylindrical battery |
| CN219144312U (en) * | 2022-12-02 | 2023-06-06 | 合肥国轩高科动力能源有限公司 | Cover plate assembly for battery and cylindrical battery |
| CN219267846U (en) * | 2023-02-16 | 2023-06-27 | 厦门海辰储能科技股份有限公司 | Battery, energy storage device and electric equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213959064U (en) * | 2020-11-18 | 2021-08-13 | 深圳市科达利实业股份有限公司 | Composite power battery shell and power battery |
| CN215451574U (en) * | 2021-03-30 | 2022-01-07 | 合肥国轩高科动力能源有限公司 | Cylindrical battery cover plate |
| CN216389546U (en) * | 2021-12-10 | 2022-04-26 | 合肥国轩高科动力能源有限公司 | Electricity core apron structure |
| CN219066992U (en) * | 2022-09-26 | 2023-05-23 | 楚能新能源股份有限公司 | Cylindrical battery combined cover plate |
| CN219144312U (en) * | 2022-12-02 | 2023-06-06 | 合肥国轩高科动力能源有限公司 | Cover plate assembly for battery and cylindrical battery |
| CN219067002U (en) * | 2023-01-03 | 2023-05-23 | 楚能新能源股份有限公司 | Top cover structure of cylindrical battery |
| CN219267846U (en) * | 2023-02-16 | 2023-06-27 | 厦门海辰储能科技股份有限公司 | Battery, energy storage device and electric equipment |
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| CN116914336A (en) | 2023-10-20 |
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