CN116190673A - End cover assembly, energy storage device, electric equipment and household energy storage system - Google Patents
End cover assembly, energy storage device, electric equipment and household energy storage system Download PDFInfo
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- CN116190673A CN116190673A CN202310330860.0A CN202310330860A CN116190673A CN 116190673 A CN116190673 A CN 116190673A CN 202310330860 A CN202310330860 A CN 202310330860A CN 116190673 A CN116190673 A CN 116190673A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The application discloses end cover subassembly, energy storage device, consumer and domestic energy storage system, wherein, end cover subassembly is applied to energy storage device, and energy storage device includes mass flow dish and electrode assembly, and mass flow dish includes extension and disk body portion, and extension and disk body portion one side are connected and keep away from disk body portion extension, are equipped with the locating hole on the extension. The end cover assembly comprises an insulating part, the insulating part comprises a body part, the body part is provided with a first surface and a second surface which are oppositely arranged, the insulating part further comprises a containing groove, the containing groove is concavely arranged on the second surface, the insulating part further comprises positioning columns, the positioning columns are convexly arranged on the groove bottom wall of the containing groove, the extending part is contained in the containing groove, and each positioning column penetrates through the positioning hole; the tray body is bent relative to the extension part, and the extension part is positioned between the tray body and the body; the end cover assembly is connected with the electrode assembly, the current collecting disc is positioned between the end cover assembly and the electrode assembly, and the disc body is connected with the electrode assembly. The energy density of the energy storage device can be improved.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to an end cover assembly, an energy storage device, electric equipment and a household energy storage system.
Background
Along with the gradual increase of the demand of the secondary energy storage device, the performance requirements of people on all aspects of the secondary energy storage device are higher and higher, especially the requirement on the cycle performance of the energy storage device, and the energy density of the energy storage device is an important parameter for ensuring the cycle performance of the energy storage device, and the energy density per unit volume is too low, so that the capacity of the energy storage device is low and the cycle performance is poor. The existing cylindrical lithium ion energy storage device is also a secondary energy storage device and consists of an end cover assembly, a current collecting disc, an electrode assembly and a cylindrical shell, wherein the electrode post of the end cover assembly and the electrode lug of the electrode assembly are connected through the current collecting disc. Because the current collecting disc is mostly straight, the connection part of the current collecting disc and the pole and the connection part of the current collecting disc and the pole lug are on the same plane, the current collecting disc occupies a larger space in the secondary energy storage device, and in the same volume, the space occupied by the electrode assembly is smaller, so that the energy density of the secondary energy storage device is restricted.
Disclosure of Invention
The application provides an end cover assembly, can solve the mass flow disk and occupy great clearance, lead to secondary energy storage device energy density to be restricted at secondary energy storage device inside technical problem.
An end cover assembly is applied to an energy storage device, the energy storage device comprises a current collecting disc and an electrode assembly, the current collecting disc comprises an extending part and a disc body part, the extending part is connected with the disc body part, at least one positioning hole is formed in the extending part, and the positioning hole penetrates through the extending part in the thickness direction of the extending part;
the end cap assembly includes an insulating member including a body portion having a first surface and a second surface, the first surface and the second surface being disposed opposite one another,
the insulating part further comprises a containing groove which is concavely arranged on the second surface of the body part,
the insulating part also comprises at least one positioning column which is convexly arranged on the bottom wall of the accommodating groove,
the extension part is accommodated in the accommodating groove, and each positioning column penetrates through one positioning hole; the tray body is bent relative to the extension part, and the tray body covers the second surface in the thickness direction of the insulating part;
the end cap assembly is connected with the electrode assembly, the current collecting tray is positioned between the end cap assembly) and the electrode assembly, and the tray body is connected with the electrode assembly.
In one possible implementation manner, the number of the positioning columns is two, and the two positioning columns are arranged in a staggered manner along the length direction of the accommodating groove.
In a possible implementation manner, two end faces of the positioning columns facing away from the accommodating groove are flush with the second surface, and the second surface and the positioning columns support the tray body.
In one possible embodiment, the positioning column is a cylinder and has a diameter of 1.5mm to 3.0mm.
In a possible implementation manner, the positioning column comprises an end face facing away from the accommodating groove and a peripheral side face connected with the end face, a chamfer is formed at the joint of the end face of the positioning column and the peripheral side face of the positioning column, and the chamfer is obliquely arranged from the end face of the positioning column to the peripheral side face direction of the positioning column.
In one possible embodiment, the cross-sectional area of the positioning post gradually decreases from the bottom wall of the accommodating groove toward the second surface.
In a possible implementation manner, the insulation component further comprises a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are respectively arranged on two opposite groove side walls of the accommodating groove, a gap is formed between the first clamping portion and the second clamping portion and between groove bottom walls of the accommodating groove, and the extension portion is limited in the thickness direction of the end cover component and is located in the gap between the first clamping portion and the groove bottom walls of the accommodating groove and the gap between the second clamping portion and the groove bottom walls of the accommodating groove.
In a possible embodiment, the body portion includes a peripheral side surface connecting between the first surface and the second surface, the peripheral side surface having a notch, the notch communicating with the accommodation groove along a length direction of the accommodation groove; the first clamping part and the second clamping part are positioned on two opposite sides of the notch.
The application provides an energy storage device, including casing, electrode assembly, current collecting disc and end cover subassembly as described above, the casing has the opening, the casing is equipped with and holds the chamber, electrode assembly hold in hold the intracavity, end cover subassembly covers the opening, disk body portion pass through the opening connect in electrode assembly.
In a possible implementation manner, the current collecting disc further comprises a connecting part, the connecting part connects the disc body part and the extension part, the connecting part is made of flexible materials, and the disc body part can be bent relative to the extension part by bending the connecting part.
In a possible implementation manner, the number of the positioning holes is two, and the two positioning holes are arranged in a staggered manner along the length direction of the extension part.
In a possible implementation manner, the positioning hole is circular, the aperture of the positioning hole is larger than the diameter of the positioning column, and the difference between the aperture of the positioning hole and the diameter of the positioning column is 0.5mm-1.0mm.
In a possible implementation manner, a plurality of limiting pieces are arranged in the positioning hole, the limiting pieces extend from the hole wall of the positioning hole to the axis direction of the positioning hole, and the limiting pieces are arranged at intervals around the axis of the positioning hole; and through holes are formed at the ends of the plurality of limiting sheets far away from the hole walls of the positioning holes, and the aperture of each through hole is smaller than the diameter of each positioning column.
In a possible implementation manner, a plurality of limiting pieces are arranged in the positioning hole, the limiting pieces are formed by cutting slits from the hole wall of the positioning hole along the radial direction of the positioning hole, a cutting seam is arranged between every two limiting pieces, and along the thickness direction of the extension part, the cutting seam penetrates through two opposite surfaces of the extension part.
In a possible implementation manner, the extension part comprises a first surface and a second surface, the first surface and the second surface are arranged opposite to each other along the thickness direction of the extension part, and the plurality of limiting sheets are convexly arranged on the hole wall of the positioning hole and are arranged at intervals around the axis of the positioning hole; each limit piece is bent and extended from the first face to the second face.
In a possible implementation manner, the positioning column is a plastic part, the limiting piece is a metal piece, the end part of the limiting piece is propped against the peripheral side surface of the positioning column, and the end part of the limiting piece is propped against the peripheral side surface of the positioning column to form a notch.
In a possible implementation manner, along the width direction of the extension portion, the extension portion includes two side edges that are oppositely arranged, the number of the positioning holes is two, along the width direction of the extension portion, the two positioning holes are arranged in a staggered manner, and in each positioning hole, one of the plurality of limiting sheets, which is close to the side edge of the extension portion and has the shortest distance, extends in the direction perpendicular to the length direction of the extension portion.
In a possible embodiment, the second face of the extension is convexly provided with a collar surrounding the edge of the positioning hole.
In a possible embodiment, the tray body includes a body having a central axis and welding protrusions protruding from a surface of the body and uniformly distributed around the central axis.
The application also provides electric equipment, which comprises the energy storage device, wherein the energy storage device is used for supplying power to the electric equipment.
The application also provides a household energy storage system comprising the energy storage device, the electric energy conversion device and the user load, wherein the energy storage device stores the electric energy of the electric energy conversion device and transmits the electric energy to the user load.
According to the energy storage device, the collecting disc is subjected to bending treatment, the disc body of the collecting disc is overlapped on one side of the extending part, which is opposite to the insulating part, and compared with the extending part and the disc body which are located on the same plane, the occupied space of the collecting disc in the energy storage device can be reduced, the space utilization rate of the energy storage device is improved, and the energy density of the energy storage device is further improved. The extension part is accommodated in the accommodating groove of the insulating part, the positioning column in the accommodating groove penetrates through the positioning hole of the extension part, and the positioning column can limit the extension part; meanwhile, in the bending process of the current collecting plate, the positioning column can limit the degree that the extending part is driven to tilt away from the direction of the accommodating groove due to bending operation, and further the end part of the extending part is prevented from being broken at the welding edge of the flange part of the pole, so that the connection reliability of the end part of the extending part of the current collecting plate and the flange part of the pole is ensured, the bending process is faster and more labor-saving, and the yield and efficiency of mass production are further improved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained by those skilled in the art without the inventive effort.
Fig. 1 is an application scenario diagram of an energy storage device provided in an embodiment of the present application;
fig. 2 is a partially exploded schematic view of an energy storage device according to an embodiment of the present disclosure;
FIG. 3 is an exploded view of a portion of the end cap assembly of the energy storage device of FIG. 2;
FIG. 4 is an exploded view of a portion of the end cap assembly of FIG. 3 at another angle;
FIG. 5 is a schematic view of the top cover of FIG. 3;
FIG. 6 is a schematic view of another angular configuration of the top cover of FIG. 5;
FIG. 7 is a schematic view of the insulating member shown in FIG. 3;
FIG. 8 is a schematic view of another angular configuration of the insulating member shown in FIG. 7;
FIG. 9 is a schematic cross-sectional view of the end cap assembly of FIG. 3;
fig. 10 is a schematic view of the structure of the manifold plate of fig. 2, showing a first embodiment of the manifold plate;
FIG. 11 is a schematic view of another angular configuration of the manifold plate of FIG. 10;
FIG. 12 is a schematic view of the assembly of the end cap assembly of FIG. 2 with the manifold hub of the first embodiment of FIG. 10 in an expanded condition;
fig. 13 is a schematic view of an end cap assembly of the energy storage device of fig. 12 with the current collecting tray in a folded condition;
fig. 14 is a schematic view of a second embodiment of the manifold plate of fig. 2;
FIG. 15 is a schematic view of the assembly of the end cap assembly of FIG. 2 with the manifold hub of the second embodiment of FIG. 14, with the manifold hub in an expanded condition;
fig. 16 is a schematic view of a third embodiment of a manifold plate of fig. 2;
fig. 17 is a schematic view of a fourth embodiment of the manifold plate of fig. 2;
FIG. 18 is a schematic illustration of the assembly of the end cap assembly of FIG. 2 with the manifold hub of the fourth embodiment of FIG. 17 in an expanded condition;
fig. 19 is a schematic view of the structure of a fifth embodiment of the collecting tray shown in fig. 2;
FIG. 20 is a schematic view of the assembly of the end cap assembly of FIG. 2 with the manifold hub of the fifth embodiment of FIG. 19 in an expanded condition;
fig. 21 is an exploded view of a portion of the energy storage device of fig. 2.
The corresponding nouns of the reference numerals in the figures are: 5000 household energy storage systems, 4000 electric energy conversion devices, 3000 user load 1,2000 user load 2, 1000 energy storage devices, 400 housings, 300 electrode assemblies, 310 cell bodies, 320 tabs, 100 end cap assemblies, 200 collector plates, 20 top caps, 21 top cap bodies, 211 post holes, 212 liquid injection holes, 213 first mounting faces, 2131 mounting slots, 2132 liquid injection slots, 214 second mounting faces, 2141 protrusions, 215 through slots, 22 explosion proof valves, 10 insulating members, 11 body portions, 111 first faces, 112 second faces, 113 peripheral sides, 114 post through holes, 115 through slots, 1151 slot bottom walls, 1152 vent holes, 116 liquid injection through slots, 1161 slot bottom walls, 1162 liquid injection through holes, 13 receiving slots, 131 first slot side walls, 132 second groove side wall, 133 third groove side wall, 134 groove bottom wall, 135 gap, 14 positioning column, 151 first clamping part, 1511 first press-connection body, 1512 first supporting body, 152 second clamping part, 1521 second press-connection body, 1522 second supporting body, 40 tray body part, 41 body, 411 third surface, 412 fourth surface, 413 electrolyte hole, 414 groove, 42 welding protrusion, 50 connecting part, 60 extending part, 61 first surface, 62 second surface, 63 positioning hole, 631 spacing piece, 631a spacing piece, 632 through hole, 634 kerf, 638 convex ring, 64 first gap, 65 second gap, 30 plastic, 31 through hole, 70 pressing block, 80 polar post, 81 cylinder, 82 flange part, 90 sealing ring.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Because of the strong timeliness and space properties of energy required by people, in order to reasonably utilize the energy and improve the utilization rate of the energy, one energy form needs to be stored by one medium or equipment and then converted into another energy form, and the energy is released in a specific energy form based on future application. As is well known, to achieve the great goal of carbon neutralization, the main approach to green electric energy generation is to develop green energy sources such as photovoltaic, wind power and the like to replace fossil energy sources. At present, the generation of green electric energy generally depends on photovoltaic, wind power, water potential and the like, but wind energy, solar energy and the like generally have the problems of strong intermittence and large fluctuation, which can cause unstable power grid, insufficient peak electricity consumption, too much electricity consumption and unstable voltage can cause damage to the electric power, so that the problem of 'wind abandoning and light abandoning' possibly occurs due to insufficient electricity consumption requirement or insufficient power grid acceptance, and the problem needs to be solved by relying on energy storage. The energy is converted into other forms of energy through physical or chemical means and is stored, the energy is converted into electric energy when needed and released, in short, the energy storage is similar to a large-scale 'charge pal', the electric energy is stored when the photovoltaic and wind energy are sufficient, and the stored electric power is released when needed.
Taking electrochemical energy storage as an example, the scheme provides an energy storage device, wherein a group of chemical batteries are arranged in the energy storage device, chemical elements in the chemical batteries are mainly used as energy storage media, and the charge and discharge process is accompanied with chemical reaction or change of the energy storage media.
The existing energy storage (i.e. energy storage) application scene is wider, including aspects such as power generation side energy storage, electric network side energy storage, renewable energy grid-connected energy storage, user side energy storage and the like, the types of corresponding energy storage devices include:
(1) The large energy storage container applied to the energy storage scene at the power grid side can be used as a high-quality active and reactive power regulation power supply in the power grid, so that the load matching of electric energy in time and space is realized, the renewable energy consumption capability is enhanced, and the large energy storage container has great significance in the aspects of standby of a power grid system, relieving peak load power supply pressure and peak regulation and frequency modulation;
(2) The main operation modes of the small and medium-sized energy storage electric cabinet applied to the industrial and commercial energy storage scenes (banks, shops and the like) at the user side and the household small-sized energy storage box applied to the household energy storage scene at the user side are peak clipping and valley filling. Because of the large price difference of the electricity charge at the peak-valley position according to the electricity consumption requirement, after the energy storage equipment is arranged by a user, in order to reduce the cost, the energy storage cabinet/box is charged usually in the electricity price valley period; and in the peak period of electricity price, the electricity in the energy storage equipment is released for use, so that the purpose of saving electricity charge is achieved. In addition, in remote areas and areas with high occurrence of natural disasters such as earthquake, hurricane and the like, the household energy storage device is equivalent to the fact that a user provides a standby power supply for the user and the power grid, and inconvenience caused by frequent power failure due to disasters or other reasons is avoided.
Fig. 1 is an application scenario diagram of an energy storage device provided in an embodiment of the present application, where a household energy storage scenario in user side energy storage is taken as an example for illustration, and the energy storage device of the present application is not limited to the household energy storage scenario.
The application provides a household energy storage system 5000, this household energy storage system 5000 includes electric energy conversion equipment (photovoltaic board) 4000, user load 1 (street lamp) 3000, user load 2 (household appliance) 2000 etc. and energy storage device 1000, and this energy storage device 1000 is as a small-size energy storage case, and accessible hanging mode is installed in outdoor wall. In particular, the photovoltaic panel may convert solar energy into electric energy during low electricity price periods, and the energy storage device 1000 is used to store the electric energy and supply the electric energy to street lamps and household appliances for use during electricity price peaks, or to supply power during power outage/power outage of the power grid.
It is understood that the energy storage device 1000 may include, but is not limited to, a battery cell, a battery module, a battery pack, a battery system, etc. When the energy storage device 1000 is a single battery, it may be a cylindrical battery. The embodiment of the present application will be described by taking the energy storage device 1000 as a cylindrical battery as an example.
Referring to fig. 2, fig. 2 is a schematic exploded view of a portion of an energy storage device according to an embodiment of the disclosure. In this embodiment, the energy storage device 1000 includes a case 400, an electrode assembly 300, an end cap assembly 100, and a current collecting plate 200 connecting the electrode assembly 300 and the end cap assembly 100. The housing 400 includes an opening and a receiving chamber. The electrode assembly 300 is received in the receiving chamber, and the cap assembly 100 is sealed to the opening. The current collecting plate 200 is provided at one side of the end cap assembly 100 adjacent to the electrode assembly 300, and the current collecting plate 200 is used to connect the tabs of the electrode assembly 300 with the tabs of the end cap assembly 100.
The electrode assembly 300 includes a cell body 310 and tabs 320. The battery cell body 310 is formed by stacking or winding together a positive electrode sheet, a negative electrode sheet, and an insulating film between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet each include a first portion coated with an active material and a second portion extending outwardly from the first portion and not coated with an active material. The tab 320 includes a negative electrode tab and a positive electrode tab, the negative electrode tab corresponds to a second portion of the negative electrode tab that is not coated with an active material, and the positive electrode tab corresponds to a second portion of the positive electrode tab that is not coated with an active material. Along the height direction of the battery cell body 310, the negative electrode tab and the positive electrode tab are respectively located at opposite ends of the battery cell body 310.
It should be noted that, the end cap assembly 100 provided in the present application may be used to connect with the negative electrode tab of the electrode assembly 300 through the current collecting plate 200, or may be used to connect with the positive electrode tab of the electrode assembly 300 through the current collecting plate 200. The embodiments of the present application are not limited in this regard.
Referring to fig. 2, 3 and 4 in combination, fig. 3 is a partially exploded view of the end cap assembly of the energy storage device shown in fig. 2, and fig. 4 is a partially exploded view of the end cap assembly at another angle shown in fig. 3. The cap assembly 100 includes an insulation member 10 and a top cap 20, the top cap 20 and the insulation member 10 being stacked and fixedly coupled, and the insulation member 10 serves to insulate the top cap 20 from the electrode assembly 300. The top cover 20 in this embodiment is an aluminum light member, and the insulating member 10 is made of plastic material and is insulating.
Referring to fig. 5 and 6, fig. 5 is a schematic structural view of the top cover shown in fig. 3; fig. 6 is a schematic view of another angular structure of the top cover shown in fig. 5. In this embodiment, the top cover 20 includes a top cover body 21 and an explosion-proof valve 22. The top cover body 21 further comprises a pole hole 211 and a liquid injection hole 212. The pole hole 211 is located at a middle position of the top cover body 21, and the explosion-proof valve 22 and the liquid injection hole 212 are respectively located at opposite sides of the pole hole 211.
Specifically, the top cover body 21 is a circular plate shape. Along the thickness direction of the top cover body 21, the top cover body 21 includes a first mounting surface 213 and a second mounting surface 214 disposed opposite to each other. In the present embodiment, the first mounting surface 213 is provided with a mounting groove 2131. The mounting groove 2131 is concavely arranged in the middle of the first mounting surface 213; the post hole 211 penetrates the bottom wall of the mounting groove 2131 and the second mounting surface 214 of the cap body 21 in the thickness direction of the cap body 21. The pole hole 211 is used for passing a pole of the energy storage device 1000. In this embodiment, the mounting groove 2131 is a cross-shaped groove.
The first mounting surface 213 is further provided with a liquid injection groove 2132, and the liquid injection groove 2132 is concavely provided on the first mounting surface 213 and is located at a side of the mounting groove 2131. The second mounting surface 214 is provided with a protruding portion 2141, and the protruding portion 2141 is formed by recessing the liquid injection groove 2132 into the first mounting surface 213 and protrudes from the second mounting surface 214. The liquid filling hole 212 penetrates the bottom wall of the liquid filling groove 2132 and the protruding portion 2141 in the thickness direction of the top cover body 21. In this embodiment, the liquid injection groove 2132 is a circular groove. In the liquid injection process of the energy storage device 1000, the electrolyte is injected into the energy storage device 1000 through the liquid injection hole 212 in the top cover 20.
The cap body 21 is provided with a through groove 215 penetrating the first mounting surface 213 and the second mounting surface 214 at a side position, and the through groove 215 is positioned at a side of the mounting groove 2131 away from the liquid injection groove 2132. The explosion-proof valve 22 is accommodated in the through groove 215 and welded with the groove wall of the through groove 215. When the pressure in the energy storage device 1000 is too high, the explosion-proof valve 22 will automatically open to release pressure, so as to prevent explosion. In this embodiment, the top cover 20 may further include a protective film (not shown) disposed at an end of the through groove 215 near the first mounting surface 213, where the protective film can prevent external foreign matters from entering the explosion-proof valve 22 or damaging the explosion-proof valve 22.
Referring to fig. 7 and 8, fig. 7 is a schematic structural view of the insulating member shown in fig. 3, and fig. 8 is another schematic angular structural view of the insulating member shown in fig. 7. In the present embodiment, the insulating member 10 includes a body portion 11. Specifically, the insulating member 10 has a cake shape. Along the thickness direction of the insulating member 10, the body portion 11 includes first and second surfaces 111 and 112 disposed opposite to each other, and a peripheral side surface 113, the peripheral side surface 113 being disposed along the periphery of the body portion 11 and connecting the first and second surfaces 111 and 112. In this embodiment, the insulating member 10 is entirely made of plastic.
The body 11 is provided with a post through hole 114. The post through hole 114 is located at a middle position of the body portion 11. The post through hole 114 penetrates the first surface 111 and the second surface 112 of the body portion 11 in the thickness direction of the body portion 11.
In this embodiment, the body 11 is a circular plate, and on the first surface 111, a vent groove 115 and a liquid injection groove 116 are respectively recessed in the opposite sides of the through hole 114 toward the second surface 112. The bottom wall 1151 of the ventilation groove 115 is provided with a ventilation hole 1152, and the ventilation hole 1152 penetrates the bottom wall 1151 of the ventilation groove 115 and the second surface 112 of the body 11. The tank bottom wall 1161 of the liquid injection through tank 116 is provided with a liquid injection through hole 1162, and the liquid injection through hole 1162 penetrates the tank bottom wall 1161 of the liquid injection through tank 116 and the second surface 112 of the body portion 11.
As shown in fig. 7, the insulating member 10 is further provided with a receiving groove 13, where the receiving groove 13 is concavely disposed on the second surface 112 and has a notch 135. Specifically, the notch 135 penetrates the peripheral side surface 113 of the body portion 11. It is also understood that the peripheral side surface 113 of the body 11 is provided with a notch 135, and the notch 135 communicates with the accommodating groove 13. The receiving groove 13 includes a first groove sidewall 131, a second groove sidewall 132, and a third groove sidewall 133, and a groove bottom wall 134. The first groove side wall 131, the second groove side wall 132 and the third groove side wall 133 are all arranged on the groove bottom wall 134 in a protruding mode and extend in a direction away from the groove bottom wall 134; the first, second and third slot side walls 131, 132, 133 are all disposed at an angle to the slot bottom wall 134. The second slot sidewall 132 is connected between the first slot sidewall 131 and the third slot sidewall 133 to form a U-shaped structure. The post through hole 114 penetrates the first surface 111 of the body portion 11 and the groove bottom wall 134 of the accommodating groove 13.
Specifically, the first slot sidewall 131 and the third slot sidewall 133 are located on opposite sides of the notch 135, respectively. The second slot sidewall 132 is located on a side of the post via 114 remote from the notch 135 and spaced opposite the notch 135, with the post via 114 being located between the notch 135 and the second slot sidewall 132. It will be appreciated that the notch 135 is a mouth opening in the receiving slot 13.
As shown in fig. 8, the insulating member 10 further includes a positioning post 14. The positioning column 14 is cylindrical and is convexly arranged on the bottom wall 134 of the accommodating groove 13. The diameter of the positioning posts 14 is 1.5mm-3.0mm. Specifically, the diameter may be 1.5mm, 3.0mm, or any value between 1.5 and 3.0. By limiting the minimum diameter of the positioning post 14 to 1.5mm, it is possible to prevent the positioning post 14 from being broken easily because the positioning post 14 has a small strength due to a small diameter of the positioning post 14. By limiting the maximum diameter of the positioning post 14 to 3.0mm, the positioning holes 63 on the extension 60 corresponding to the positioning post 14 can be prevented from being oversized, thereby preventing the strength of the extension 60 from being small due to the narrow spacing between adjacent positioning holes 63 on the extension 60.
The end surface of the positioning post 14 facing away from the accommodating groove 13 is flush with the second surface 112 of the body 11. The positioning posts 14 are also provided with chamfers. The positioning column 14 comprises an end face far away from the accommodating groove 13 and a peripheral side face connected with the end face, a chamfer is formed at the joint of the end face of the positioning column 14 and the peripheral side face of the positioning column 14, and the chamfer is obliquely arranged from the end face of the positioning column 14 to the peripheral side face direction of the positioning column 14. It will be appreciated that the positioning posts 14 are conical posts along the thickness of the insulating member 10. In other embodiments, the positioning post 14 may have other shapes, such as a tapered cylinder, and the cross section of the positioning post 14 gradually decreases from the bottom wall 134 of the accommodating groove 13 toward the second surface 112. The positioning post 14 may also protrude from the second surface 112 of the body portion 11, or the positioning post 14 may not protrude from the second surface 112 of the body portion 11.
The number of the positioning posts 14 is at least one, and in this embodiment, the number of the positioning posts 14 is two. Along the length direction of the accommodating groove 13, two positioning columns 14 are arranged in a staggered manner; along the width direction of the accommodating groove 13, the two positioning posts 14 are also arranged in a staggered manner. The positioning posts 14 may be aligned along the length direction or the width direction of the accommodating groove 13. In this embodiment, the positioning posts 14 are made of plastic.
With continued reference to fig. 8, the insulating member 10 further includes a first clamping portion 151 and a second clamping portion 152. The first clamping part 151 and the second clamping part 152 are respectively arranged on two opposite side surfaces of the first groove side wall 131 and the third groove side wall 133, and the first clamping part 151 and the second clamping part 152 are close to the notch 135; it will be appreciated that the first and second clamping portions 151 and 152 are located on opposite sides of the notch 135 of the accommodating groove 13, and the first and second clamping portions 151 and 152 are opposite in a direction in which the first and third groove side walls 131 and 133 are opposite. A gap is provided between the first and second engaging portions 151 and 152 and the groove bottom wall 134 of the accommodating groove 13 in the thickness direction of the insulating member 10. In other embodiments, the first engaging portion 151 and the second engaging portion 152 may be disposed in a staggered manner in a direction in which the first groove sidewall 131 and the third groove sidewall 133 are opposite to each other.
The first clamping portion 151 includes a first crimp body 1511 and a first abutting body 1512. The first press-contact body 1511 is provided on the side surface of the first groove side wall 131 facing the third groove side wall 133, and the first press-contact body 1511 is provided obliquely to the groove bottom wall 134 of the accommodating groove 13. The first press-contact body 1511 includes a first inclined surface facing away from the groove bottom wall 134 of the accommodating groove 13, the first inclined surface being connected to the wall surface of the first groove side wall 131 of the accommodating groove 13 and inclined toward the groove bottom wall 134 of the accommodating groove 13. The first abutting body 1512 is disposed at a distance from the first crimp body 1511 in the thickness direction of the insulating member 10, one end of the first abutting body 1512 is fixed to the side surface of the first groove side wall 131, and the other end is connected to the free end of the first crimp body 1511. The first press contact 1511 and the first abutting body 1512 are elastic members. A gap is formed between the first press-connection body 1511 and the first abutting body 1512, that is, the whole first clamping portion 151 is in a hollow structure, so that the elastic force of the first clamping portion 151 can be improved. It can be understood that the first clamping portion 151 has a cavity, and the first clamping portion 151 has a hollow structure. The slant design and the hollow design of the first clamping portion 151 can make the first clamping portion 151 more labor-saving when being pressed downwards. The first abutting body 1512 can support the first press-connection body 1511, so that the first press-connection body 1511 is prevented from deforming after being used repeatedly, and repeated use of the first clamping portion 151 is prevented from being affected. In this embodiment, the first press contact 1511 and the first abutting body 1512 are integrally formed. In other embodiments, the first clamping portion 151 may also be a separate structural member, i.e., the first clamping portion 151 may be a triangular block.
The second clamping portion 152 includes a second crimp body 1521 and a second abutment body 1522. The second press-contact body 1521 is provided on the side surface of the third groove side wall 133 facing the first groove side wall 131, and the second press-contact body 1521 is provided obliquely to the groove bottom wall 134 of the accommodating groove 13. The second press-contact body 1521 includes a second inclined surface facing away from the groove bottom wall 134 of the accommodating groove 13, the second inclined surface being connected to the wall surface of the third groove side wall 133 of the accommodating groove 13 and inclined toward the groove bottom wall 134 of the accommodating groove 13. Along the thickness direction of the insulating member 10, a second abutting body 1522 and a second press-contact body 1521 are disposed at intervals, one end of the second abutting body 1522 is fixed to the side surface of the third groove side wall 133, and the other end is connected to the free end of the second press-contact body 1521. The second press-connection body 1521 and the second abutting body 1522 are elastic members; a gap is formed between the second pressing body 1521 and the second abutting body 1522, so as to promote the elastic force of the second clamping portion 152. It can be understood that the second clamping portion 152 has a cavity, and the second clamping portion 152 has a hollow structure. The oblique design and the hollow design of the second clamping portion 152 can make the second clamping portion 152 more labor-saving when being pressed downwards. The second abutting body 1522 can support the second press-connection body 1521, so as to avoid the deformation of the second press-connection body 1521 after multiple uses and the influence on multiple repeated uses of the second clamping portion 152. In this embodiment, the second pressing body 1521 and the second abutting body 1522 are integrally formed. In other embodiments, the second clamping portion 152 may also be a separate structural member, i.e., the second clamping portion 152 may be a triangular block.
Referring to fig. 9, fig. 9 is a schematic cross-sectional view of the end cap assembly of fig. 3. The insulating member 10 is stacked on the second mounting surface 214 of the top cover 20. The first surface 111 of the insulating member 10 and the second mounting surface 214 of the top cover 20 face and are bonded to each other. The post through-hole 114 of the insulating member 10 is disposed coaxially with the post hole 211 of the top cover 20 in the thickness direction of the end cover assembly 100 and communicates with the post through-hole 114. The ventilation groove 115 of the insulating member 10 is disposed opposite to and communicates with the ventilation groove 215 of the top cover 20 in the thickness direction of the cap assembly 100; the orthographic projection of the through slot 215 of the top cover 20 on the body portion 11 falls within the orthographic projection of the through slot 115 on the body portion 11. The liquid injection through groove 116 of the insulating part 10 is opposite to and communicated with the liquid injection hole 212 of the top cover 20 along the thickness direction of the end cover assembly 100; the orthographic projection of the liquid filling hole 212 of the top cover 20 on the main body 11 falls into the orthographic projection of the liquid filling through groove 116 on the main body 11.
It will be appreciated that the tabs or separator films are prone to breakage and debris during transportation of the energy storage device 1000. The bottom wall 1151 of the ventilation groove 115 can prevent fragments of the tab or the isolation film from floating below the explosion-proof valve 22, and prevent the passage of air from being blocked, thereby causing explosion-proof failure. The bottom wall 1161 of the liquid injection through groove 116 can prevent fragments of the tab or the isolation film from floating below the liquid injection hole 212, and prevent the liquid injection hole 212 from being blocked, thereby affecting the liquid injection process.
Referring to fig. 10 and 11, fig. 10 is a schematic structural view of the collecting tray shown in fig. 2, and fig. 11 is another schematic angular structural view of the collecting tray shown in fig. 10. The current collecting tray 200 includes a tray body 40, a connection portion 50, and an extension portion 60. The tray portion 40 is fixedly connected to the tab 320 of the electrode assembly 300, and the extension portion 60 is fixedly connected to the post of the end cap assembly 100. The connection portion 50 is connected between the tray body 40 and the extension portion 60. By bending the connection portion 50, the tray body 40 can be bent with respect to the extension portion 60. In this embodiment, the collecting tray 200 has a sheet-like structure as a whole.
The tray body 40 includes a body 41 and a welding boss 42. The body 41 has a central axis, and the welding projections 42 are provided on the body 41, the welding projections 42 being uniformly distributed around the central axis of the body 41.
In this embodiment, the body 41 has a disk shape. Along the thickness direction of the body 41, the body 41 includes a third surface 411 and a fourth surface 412 disposed opposite to each other.
The welding protrusion 42 is protruding from the third surface 411 of the body 41, and the welding protrusion 42 is substantially elongated and shaped like a plate and extends along the radial direction of the body 41. In the present embodiment, the number of the welding projections 42 is 4. The welding protrusions 42 are uniformly distributed around the central axis of the body 41, which corresponds to being circumferentially distributed around the center of the body 41, and adjacent two welding protrusions 42 are angularly spaced on the body 41 by 90 °. The welding protrusions 42 are used to weld with the tabs 320 of the electrode assembly 300, i.e., the tabs 320 of the electrode assembly 300 are connected with the current collecting plate 200 through the welding protrusions 42.
The body 41 is provided with electrolyte holes 413 and grooves 414. The electrolyte hole 413 is located at an intermediate position of the body 41, and the electrolyte hole 413 penetrates the third surface 411 and the fourth surface 412 of the body 41 in the thickness direction of the body 41. The electrolyte holes 413 are used to allow electrolyte to flow into the electrode assembly 300 during the injection process.
The groove 414 is concavely formed on the fourth surface 412 of the body 41. In the present embodiment, the groove 414 is substantially elongated and extends along the radial direction of the body 41; the number of the grooves 414 is 4, and the grooves are circumferentially distributed around the center of the body 41; adjacent two grooves 414 are angularly spaced 90 apart on the body 41. Along the thickness direction of the body 41, the positions of the 4 welding protrusions 42 are opposite to the positions of the 4 grooves 414 respectively, that is, in the thickness direction of the disc portion 40, the front projection of the welding protrusions 42 on the body 41 is at least partially overlapped with the front projection of the grooves 414 on the body 41.
It will be appreciated that by providing the grooves 414 on the body 41 and having the grooves 414 and the welding projections 42 opposite in the thickness direction of the body 41, on the one hand, the combination of the grooves 414 and the welding projections 42 has no great influence on the strength of the entire tray body 40, and on the other hand, the provision of the grooves 414 can reduce the production material for producing the tray body 40, which is advantageous in reducing the production cost and weight of the current collecting tray 200.
The connecting portion 50 is a substantially rectangular thin plate, and one end of the connecting portion 50 is connected to the circumferential surface of the body 41 and the other end is connected to an end of the extending portion 60. In this embodiment, the connection portion 50 is made of a flexible material. It is understood that the connection portion 50 is connected between the body 41 of the tray body 40 and the extension portion 60, and the extension portion 60 extends in the same direction as the connection portion 50.
The extending portion 60 is a substantially rectangular thin plate, the extending portion 60 is formed by extending the side portion of the connecting portion 50 away from the body 41, and the extending direction of the extending portion 60 in this embodiment is the same as the extending direction of one welding protrusion 42.
Along the thickness direction of the extension portion 60, the extension portion 60 includes a first face 61 and a second face 62 disposed opposite to each other. The extension portion 60 is provided with a positioning hole 63, and the positioning hole 63 penetrates through the first surface 61 and the second surface 62 of the extension portion 60 along the thickness direction of the extension portion 60. The number of the positioning holes 63 is at least one, and in this embodiment, the number of the positioning holes 63 is 2. Along the length direction of the extension part 60, two positioning holes 63 are arranged in a staggered manner; along the width direction of the extension portion 60, the two positioning holes 63 are also offset. The positioning hole 63 is circular in shape, the aperture of the positioning hole 63 is larger than the diameter of the positioning column 14 of the insulating part 10, and the difference between the aperture of the positioning hole 63 and the diameter of the positioning column 14 is 0.5mm-1.0mm, specifically, may be 0.5mm, may be 1.0mm, or may be any numerical value between 0.5 and 1.0. In other embodiments, the positioning holes 63 may have other shapes, such as rectangular, triangular, diamond, etc. The two positioning holes 63 may be aligned along the length direction or the width direction of the extension portion 60.
The extension 60 is further provided with a first notch 64 and a second notch 65. The first notch 64 and the second notch 65 are located on opposite sides of the end of the extension 60 connected to the connection portion 50 in the width direction of the extension 60. The first notch 64 and the second notch 65 penetrate the first face 61 and the second face 62 of the extension 60 in the thickness direction of the extension 60.
Referring to fig. 12 and 13, fig. 12 is a schematic view of the assembly process of the end cap assembly of fig. 2 and the manifold of the first embodiment of fig. 10, wherein the manifold is in an expanded state; fig. 13 is a schematic view of an end cap assembly of the energy storage device of fig. 12 with the current collecting tray in a folded condition.
The extension 60 of the current collecting plate 200 is received in the receiving groove 13 of the insulating member 10. Along the thickness direction of the insulating member 10, the positioning posts 14 in the accommodating groove 13 of the insulating member 10 are inserted into the positioning holes 63 of the extending portion 60 of the current collecting plate 200, and the first notch 64 and the second notch 65 of the extending portion 60 of the current collecting plate 200 are opposite to the first clamping portion 151 and the second clamping portion 152 of the insulating member 10, respectively. Specifically, along the thickness direction of the insulating member 10, the first engaging portion 151 faces the first notch 64, and the second engaging portion 152 faces the second notch 65. In the thickness direction of the insulating member 10 and towards the second surface 112, the first clamping portion 151 partially passes through the first notch 64, and the second clamping portion 152 partially passes through the second notch 65 until the first clamping portion 151 and the second clamping portion 152 are clamped by pressing the extending portion 60, specifically pressing the edge positions of the first notch 64 and the second notch 65; in this process, the extension portion 60 pushes against the first inclined surface of the first clamping portion 151 and the second inclined surface of the second clamping portion 152. The first and second clamping portions 151 and 152 deform so that the extension portion 60 passes. It can be understood that, along the thickness direction of the insulating member 10, the first clamping portion 151 and the bottom wall 134 of the accommodating groove 13 limit (clamp) the extension portion 60 of the current collecting tray 200, and the extension portion 60 is limited in the gap between the first clamping portion 151 and the bottom wall 134 of the accommodating groove 13; the second clamping portion 152 and the bottom wall 134 of the accommodating groove 13 limit (clamp) the extension portion 60 of the current collecting tray 200, and the extension portion 60 is limited in a gap between the second clamping portion 152 and the bottom wall 134 of the accommodating groove 13. After the extension part 60 of the current collecting plate 200 is mounted in the accommodating groove 13, the first clamping part 151 and the second clamping part 152 can prevent the extension part 60 of the current collecting plate 200 from being separated from the accommodating groove 13; meanwhile, by arranging the first notch 64 and the second notch 65, the extension portion 60 of the current collecting disc 200 partially avoids the first clamping portion 151 and the second clamping portion 152, so that the extension portion 60 of the current collecting disc 200 can be clamped into the accommodating groove 13 more labor-saving.
Through the connection portion 50 of the bending current collecting plate 200, the plate body 40 may be bent with respect to the extension portion 60, and the plate body 40 covers the second surface 112 of the body 11 along the thickness direction of the insulating member 10, and the extension portion 60 is located between the plate body 40 and the body 11. When the positioning posts 14 are flush with the second surface 112 of the body portion 11 or protrude beyond the second surface 112, the second surface 112 of the body portion 11 and the positioning posts 14 may support the tray body 40 of the current collecting tray 200. In the present embodiment, the orthographic projection of the disk portion 40 is located within the orthographic projection of the insulating member 10 in the thickness direction of the insulating member 10. The area of the tray body 40 is smaller than the area of the second surface 112, and the tray body 40 covers a large area of the second surface 112, not entirely covering the second surface 112.
It will be appreciated that when the extension 60 of the current collecting plate 200 is assembled to the insulating member 10, the positioning posts 14 in the receiving slots 13 of the insulating member 10 can limit the extension 60 of the current collecting plate 200; the positioning posts 14 prevent the manifold plate 200 from dislocating and wobbling during bending of the manifold plate 200. The tray portion 40 moves toward the extending portion 60 to bend the connecting portion 50, and the bending angle transmits the bending force to the extending portion 60, so as to drive the extending portion 60 to tilt away from the accommodating groove 13. The positioning column 14 can limit the extent to which the extension portion 60 of the current collecting plate 200 is lifted away from the accommodating groove 13 due to the bending operation of the current collecting plate 200. In addition, since the aperture of the positioning hole 63 of the extension portion 60 of the current collecting plate 200 is larger than the diameter of the positioning column 14 of the insulating member 10, and the difference between the aperture of the positioning hole 63 and the diameter of the positioning column 14 is 0.5mm-1.0mm, a certain assembly gap is reserved in the positioning hole 63 of the extension portion 60, so that the positioning column 14 of the insulating member 10 is conveniently inserted into the positioning hole 63 of the extension portion 60. The end of the positioning post 14 is provided with a chamfer to avoid the end surface of the positioning post 14 from scratching the extension portion 60 of the current collecting plate 200 when the positioning post 14 is inserted into the positioning hole 63 of the extension portion 60 of the current collecting plate 200. Since the area of the free end face of the positioning post 14 is smaller than the area of the cross section away from the free end, the positioning post 14 of the insulating member 10 is facilitated to penetrate the positioning hole 63 of the extension portion 60.
By limiting the minimum diameter of the positioning post 14 to 1.5mm, the positioning post 14 can be prevented from being broken by the edge of the positioning hole 63 of the extension portion 60 when the extension portion 60 is tilted away from the accommodating groove 13 due to the fact that the strength of the positioning post 14 is small caused by the small diameter of the positioning post 14. By limiting the maximum diameter of the positioning column 14 to 3.0mm, the oversized positioning holes 63 corresponding to the positioning column 14 on the extension portion 60 can be avoided, so that the extension portion 60 is prevented from being broken or even broken due to the acting force of the positioning column 14 on the extension portion 60 when the extension portion 60 is prevented from tilting in the direction away from the accommodating groove 13 due to the narrower spacing between the adjacent positioning holes 63 on the extension portion 60 and the smaller strength of the extension portion 60.
Because the positioning posts 14 on the insulating part 10 are arranged in a staggered manner, the positioning holes 63 of the extending parts 60 of the current collecting disc 200 are correspondingly arranged in a staggered manner, on one hand, the situation that the surrounding stress of the positioning holes 63 is too concentrated due to the fact that the extending parts 60 of the current collecting disc 200 are driven to tilt away from the accommodating grooves 13 due to bending operation of the current collecting disc 200, and the surrounding stress of the positioning holes 63 caused by a certain stretching force effect is excessively concentrated is avoided, further, the situation that the extending parts 60 of the current collecting disc 200 are easily cracked and broken from the positioning holes 63 due to stress concentration in the bending process, the service life of the energy storage device 1000 is influenced, and on the other hand, a certain fool-proof effect is provided, and the fact that the third surfaces 411 provided with the welding protrusions 42 on the current collecting disc 200 face the direction of the lugs 320 can be guaranteed under the condition that the positions of the staggered positioning posts 14 and the staggered positioning holes 63 are in a one-to-one correspondence to prevent the current collecting disc 200 from being placed reversely and incapable of welding with the fallen lugs.
Referring to fig. 14, fig. 14 is a schematic structural diagram of a second embodiment of the current collecting plate shown in fig. 2. The second embodiment is different from the first embodiment in the structure of the positioning holes 63 of the extension 60 of the current collecting plate 200.
The positioning hole 63 of the extension portion 60 is provided with a plurality of stopper pieces 631, and the stopper pieces 631 extend from the wall of the positioning hole 63 in the axial direction of the positioning hole 63. Specifically, the plurality of limiting pieces 631 are flat pieces. The plurality of limiting pieces 631 are disposed at intervals around the axis of the positioning hole 63. The end portions of the plurality of limiting pieces 631 away from the hole wall of the positioning hole 63 form a through hole 632. The aperture of the through hole 632 is smaller than the diameter of the positioning column 14. In this embodiment, the number of the limiting pieces 631 is 6. The limiting piece 631 is an elastic body, and specifically, the limiting piece 631 is a metal sheet with elasticity. The limiting piece 631 is integrally formed with the extension 60.
In this embodiment, along the width direction of the extension portion 60, the extension portion 60 includes two side edges disposed opposite to each other. The number of the positioning holes 63 is 2, and the positioning holes 63 are staggered along the width direction of the extension portion 60, which is equivalent to two positioning holes 63 respectively near two opposite sides of the extension portion 60. Among the plurality of limiting pieces 631 in each positioning hole 63, one limiting piece 631a having the shortest side distance from the extending portion 60 adjacent to each positioning hole 63 extends in a direction perpendicular to the length direction of the extending portion 60. In other embodiments, in each positioning hole 63, the gap between two adjacent limiting plates 631 may be the shortest distance from the side of the extension portion 60 near each positioning hole 63.
Fig. 15 is a schematic view of the assembly process of the end cap assembly of fig. 2 with the current collecting plate of the second embodiment of fig. 14. The extension 60 of the current collecting plate 200 is received in the receiving groove 13 of the insulating member 10. The positioning posts 14 in the accommodating groove 13 of the insulating member 10 penetrate through the positioning holes 63 of the extending portion 60 along the thickness direction of the insulating member 10. When the positioning column 14 of the insulating member 10 is inserted into the positioning hole 63 of the extension portion 60, since the hole diameter of the through hole 632 formed by the plurality of limiting pieces 631 is smaller than the outer diameter of the positioning column 14, the positioning column 14 applies a force to the limiting pieces 631 facing away from the accommodating groove 13, so that the limiting pieces 631 elastically deform and bend in a direction facing away from the accommodating groove 13; in the process that the positioning column 14 passes through the positioning hole 63 and after the positioning column 14 passes through the positioning hole 63, the limiting piece 631 has elastic resilience force and continuously abuts against the peripheral side surface of the positioning column 14, and friction force is generated between the limiting piece 631 and the peripheral side surface of the positioning column 14, so that the positioning column 14 is positioned. In the process of bending the connection portion 50 of the current collecting plate 200, the plate body 40 moves toward the extension portion 60, so that the connection portion 50 is bent, and the bending angle transmits the bending force to the extension portion 60, so as to drive the extension portion 60 to tilt away from the accommodating groove 13. At this time, the stopper 631 also moves in a direction away from the accommodating groove 13. Because the positioning column 14 is a plastic part, the limiting piece 631 is a metal piece, the end part of the limiting piece 631 is propped against the peripheral side surface of the positioning column 14, and the end part of the limiting piece 631 is propped against the peripheral side surface of the positioning column 14 to form a notch, the end part of the limiting piece 631, which is propped against the positioning column 14, can be clamped into the notch, and further the positioning column 14 can prevent the movement of the limiting piece 631, so that the extension part 60 is prevented from continuously tilting in a direction away from the accommodating groove 13, and the stability of the extension part 60 assembled on the insulating part 10 is improved.
Since one of the restriction pieces 631a having the shortest distance from the side of the extension 60 in the width direction of the extension 60 extends in a direction perpendicular to the length direction of the extension 60, the restriction piece 631 forms the fusing part of the current collecting tray 200. When the energy storage device 1000 is excessively charged or discharged or a short circuit occurs, the limiting piece 631 is first fused with the side of the extension portion 60, that is, a crack is formed between the limiting piece 631 and the side of the extension portion 60 along the width direction of the extension portion 60.
In this embodiment, the number of the positioning holes 63 is 2, and two positioning holes 63 are respectively close to two sides of the extension portion 60. As shown in fig. 15, the limiting piece 631a in one positioning hole 63 extends along the width direction of the extension portion 60 and the extending direction is perpendicular to the length direction of the extension portion 60, and the distance from the side edge of the extension portion 60 is the shortest. The limiting piece 631a and the side edge of the extension portion 60 are fused to form a crack. Subsequently, since the current on the current collecting plate 200 is mainly concentrated between the two positioning holes 63, cracks are also fused between the two positioning holes 63. At this time, the extending portion 60 is formed with a crack penetrating the extending portion 60 along the width direction of the extending portion 60, and the extending portion 60 is in an open state, so that the whole energy storage device 1000 is in an open state, thereby avoiding overheating of the interior of the energy storage device 1000 caused by excessive current, and ensuring the use safety of the energy storage device 1000.
Referring to fig. 16, fig. 16 is a schematic structural diagram of a third embodiment of the current collecting plate shown in fig. 2. The third embodiment is different from the second embodiment in the shape of the stopper 631.
In this embodiment, the plurality of limiting pieces 631 are protruding from the wall of the positioning hole 63, and the plurality of limiting pieces 631 extend from the wall of the positioning hole 63 toward the axis direction of the positioning hole 63. Specifically, the plurality of limiting pieces 631 are curved pieces. The plurality of limiting pieces 631 are convexly arranged on the hole wall of the positioning hole 63, and each limiting piece 631 is bent and extended from the first surface 61 to the second surface 62 of the extension part 60. The extending track of the plurality of limiting pieces 631 is arc-shaped. The end portions of the plurality of limiting pieces 631 away from the hole wall of the positioning hole 63 form a through hole 632. The second through hole 632 has a smaller diameter than the diameter of the positioning column 14.
A schematic illustration of the assembly of the end cap assembly of fig. 2 with the current collecting tray of the third embodiment of fig. 16 is also shown in fig. 15. The extension 60 of the current collecting plate 200 is received in the receiving groove 13 of the insulating member 10. The positioning posts 14 in the accommodating groove 13 of the insulating member 10 penetrate through the positioning holes 63 of the extending portion 60 along the thickness direction of the insulating member 10. When the positioning post 14 of the insulating member 10 is inserted into the positioning hole 63 of the extension portion 60, the positioning post 14 of the insulating member 10 is first abutted against the surfaces of the plurality of stopper pieces 631 facing the first face 61 of the extension portion 60, and then the positioning post 14 can be slid along the surfaces of the plurality of stopper pieces 631 in a direction perpendicular to the positioning hole 63 until the positioning post 14 completely passes through the positioning hole 63. Therefore, the plurality of limiting pieces 631 in the positioning hole 63 of the extension portion 60 are in a curved state, the curved direction is along the passing direction of the positioning column 14, so that the positioning column 14 can be guided to pass through the positioning hole 63, and the plurality of limiting pieces 631 have elastic resilience force to abut against the outer peripheral surface of the positioning column 14, so as to limit the positioning column 14.
In addition, during the bending process of the connection portion 50 of the current collecting plate 200, the plate body 40 moves toward the extending portion 60, so that the connection portion 50 is bent, and the bending angle transmits the bending force to the extending portion 60, so as to drive the extending portion 60 to tilt away from the accommodating groove 13. At this time, the stopper 631 also moves in a direction away from the accommodating groove 13. Because the positioning column 14 is a plastic part, the limiting piece 631 is a metal piece, the end part of the limiting piece 631 is propped against the peripheral side surface of the positioning column 14, and the end part of the limiting piece 631 is propped against the peripheral side surface of the positioning column 14 to form a notch, the end part of the limiting piece 631, which is propped against the positioning column 14, can be clamped into the notch, and further the positioning column 14 can prevent the movement of the limiting piece 631, so that the extension part 60 is prevented from continuously tilting in a direction away from the accommodating groove 13, and the stability of the extension part 60 assembled on the insulating part 10 is improved.
Referring to fig. 17, fig. 17 is a schematic structural diagram of a fourth embodiment of the current collecting plate shown in fig. 2. The fourth embodiment is different from the first embodiment in the structure of the positioning holes 63 of the extension 60 of the current collecting plate 200.
In this embodiment, the limiting pieces 631 in the positioning hole 63 are formed by cutting slits from the wall of the positioning hole 63 along the radial direction of the positioning hole 63, and a slit 634 is provided between every two limiting pieces 631. It will be appreciated that the slit extends toward the extension portion 60 around the positioning hole 63 without cutting the side edge of the extension portion 60, that is, the positioning hole 63 including the limiting piece 631 is spaced from the side edge of the extension portion 60. Along the thickness of extension 60, a plurality of slits 634 extend through first face 61 and second face 62 of extension 60. A plurality of slits 634 are spaced about the axis of locating hole 63. In this embodiment, the number of slits 634 is 4, and the number of limiting pieces 631 is 4. The limiting piece 631 is an elastic body, and in particular, the limiting piece 631 may be a metal sheet with elasticity. The limiting piece 631 is integrally formed with the extension 60.
Fig. 18 is a schematic view of an assembly process of the end cap assembly of fig. 2 with the current collecting plate of the fourth embodiment of fig. 17. The extension 60 of the current collecting plate 200 is received in the receiving groove 13 of the insulating member 10. The positioning posts 14 in the accommodating groove 13 of the insulating member 10 penetrate through the positioning holes 63 of the extending portion 60 along the thickness direction of the insulating member 10. When the positioning post 14 of the insulating member 10 is inserted into the positioning hole 63 of the extension portion 60, even if the positioning post 14 is not coaxially opposed to the positioning hole 63, the positioning post 14 can elastically deform any one of the positioning holes 63 in a direction away from the accommodating groove 13 to be bent. At this time, the limiting piece 631 guides the movement of the positioning column 14, and the positioning column 14 can slide along the surface of the limiting piece 631 and pass through the positioning hole 63. When the positioning column 14 and the positioning hole 63 are coaxially arranged, the limiting piece 631 rebounds to restore to the original state. Therefore, by forming the plurality of limiting pieces 631 after the hole wall of the positioning hole 63 cuts the slit along the radial direction of the positioning hole 63, the alignment precision of the positioning column 14 and the positioning hole 63 can be reduced, thereby reducing the process difficulty.
Referring to fig. 19, fig. 19 is a schematic structural view of a fifth embodiment of the current collecting plate shown in fig. 2. The fifth embodiment is different from the first embodiment in the structure of the positioning holes 63 of the extension 60 of the current collecting plate 200.
In this embodiment, the edge of the positioning hole 63 of the extension portion 60 is provided with a convex ring 638. The protruding ring 638 protrudes from the second surface 62 of the extension portion 60, and extends in a direction away from the second surface 62 of the extension portion 60. A collar 638 surrounds the edge of the locating hole 63. In this embodiment, the protruding ring 638 is circular, and the protruding ring 638 is made of metal. The collar 638 is integrally formed with the extension 60. The collar 638 of the present embodiment is applicable to the positioning hole 63 of any of the above embodiments, and the inner diameter of the collar 638 is the same as the inner diameter defined by the actual hole wall of the positioning hole 63.
Fig. 20 is a schematic view of an assembly process of the end cap assembly of fig. 2 with the manifold plate of the fifth embodiment of fig. 19. The extension 60 of the current collecting plate 200 is received in the receiving groove 13 of the insulating member 10. The positioning posts 14 in the accommodating groove 13 of the insulating member 10 penetrate through the positioning holes 63 of the extending portion 60 along the thickness direction of the insulating member 10. In the process of bending the connection portion 50 of the current collecting plate 200, the plate body 40 moves toward the extension portion 60, so that the connection portion 50 is bent, and the bending angle transmits the bending force to the extension portion 60, so as to drive the extension portion 60 to tilt away from the accommodating groove 13. Since the positioning column 14 is made of plastic, the positioning column 14 has slight elasticity, the current collecting plate 200 is made of metal, and the edge of the positioning hole 63 of the extension portion 60 can press the positioning column 14 during the tilting process of the extension portion 60. By additionally arranging the convex rings 638 on the edges of the positioning holes 63, the contact area between the edges of the positioning holes 63 and the positioning column 14 can be increased, the pressure intensity born by the positioning column 14 is reduced, the deformation of the positioning column 14 is further reduced, and the limiting effect of the positioning column 14 on the extension part 60 is ensured; the situation that the pressure intensity of the positioning column 14 is high due to the fact that the contact area between the edge of the positioning hole 63 and the positioning column 14 is small due to the fact that the edge of the positioning hole 63 is thin is avoided; and further, the deformation of the positioning column 14 is avoided, even the edge of the positioning hole 63 is broken, and the limiting effect of the positioning column 14 on the extension part 60 is prevented.
Referring to fig. 21, fig. 21 is an exploded view of a portion of the energy storage device shown in fig. 2. The end cap assembly 100 also includes an upper plastic 30, a press block 70, a post 80, and a seal ring 90. Specifically, the upper plastic 30 and the top cover 20 are stacked, and the upper plastic 30 is located on the side of the top cover 20 facing away from the insulating member 10. The upper plastic 30 is provided with a through hole 31 for the pole 80 to pass through. The pressing block 70 is laminated on one side of the upper plastic 30 away from the top cover 20 and is fixedly connected with the upper plastic 30. Wherein the post 80 includes a post 81 and a flange 82. The column 81 of the pole 80 sequentially penetrates through the pole through hole 114 of the insulating member 10, the pole hole 211 of the top cover 20, and the through hole 31 of the upper plastic 30 along the thickness direction of the end cover assembly 100, and is fixedly connected with the pressing block 70. The flange portion 82 of the post 80 is crimped with the second surface 112 of the insulating member 10. The end cap assembly 100 and the electrode assembly 300 are connected by the current collecting plate 200, and the current collecting plate 200 is positioned between the end cap assembly 100 and the electrode assembly 300. The extension portion 60 of the current collecting plate 200 is accommodated in the accommodating groove 13 of the insulating member 10, and the extension portion 60 of the current collecting plate 200 is fixedly connected with the flange portion 82 of the post 80. The disk body 40 of the current collecting disk 200 is fixedly connected with the tab 320 of the electrode assembly 300. The seal ring 90 is fitted to the end of the post 80 adjacent the flange 82 of the post 80. In this embodiment, the extension portion 60 of the current collecting plate 200 is connected to the flange portion 82 of the post 80 by welding, and the plate body portion 40 of the current collecting plate 200 is connected to the tab 320 of the electrode assembly 300 by welding.
The assembly process of the energy storage device 1000 provided in the embodiment of the present application is: first, the end cap assembly 100, the electrode assembly 300, the current collecting plate 200, and the case 400 are manufactured, respectively; secondly, the extension part 60 of the current collecting disc 200 is clamped in the accommodating groove 13 through the first clamping part 151 and the second clamping part 152 of the insulating component 10, and the end part of the extension part 60 of the current collecting disc 200 is welded and fixed with the flange part 82 of the pole 80; thirdly, welding and fixing the disk body 40 of the current collecting disk 200 with the tab 320 of the electrode assembly 300; thereafter, the connection part 50 of the current collecting plate 200 is bent such that the plate body 40 of the current collecting plate 200 is stacked on the side of the extension part 60 of the current collecting plate 200 facing away from the insulating member 10, while the end cap assembly 100 is substantially coaxial with the electrode assembly 300; finally, the electrode assembly 300 is placed in the case 400 such that the cap assembly 100 is covered and sealed at the opening of the case 400, and the tray body 40 of the current collecting tray 200 is connected to the electrode assembly 300 through the opening.
It can be appreciated that after the extension portion 60 of the current collecting disc 200 is connected to the pole post 80 of the end cap assembly 100 and the disc portion 40 of the current collecting disc 200 is connected to the pole lug 320 of the electrode assembly 300, the bending process of the current collecting disc 200 may partially overlap the extension portion 60 and the disc portion 40 along the height direction of the energy storage device 1000, so that the occupied space of the current collecting disc 200 inside the energy storage device 1000 may be reduced, and the space utilization of the energy storage device 1000 may be improved, as compared with the case where the extension portion 60 and the disc portion 40 are on the same plane, thereby further improving the energy density of the energy storage device 1000. The positioning column 14 of the insulating part 10 can limit the extension part 60 of the current collecting disc 200 through the mutual matching of the positioning column 14 of the insulating part 10 and the positioning hole 63 of the extension part 60 of the current collecting disc 200; meanwhile, in the bending process of the current collecting plate 200, the positioning column 14 of the insulating part 10 can limit the degree that the extending part 60 of the current collecting plate 200 is driven to tilt upwards due to bending operation, so that the end part of the extending part 60 of the current collecting plate 200 is prevented from being broken at the welding edge of the flange part 82 of the pole 80, the connection reliability of the end part of the extending part 60 of the current collecting plate 200 and the flange part 82 of the pole 80 is ensured, the bending process is faster and more labor-saving, and the yield and efficiency of mass production are further improved.
The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (21)
1. An end cover assembly applied to an energy storage device (1000), wherein the energy storage device (1000) comprises a current collecting disc (200) and an electrode assembly (300), the current collecting disc (200) comprises an extension part (60) and a disc body part (40), and the extension part (60) is connected with the disc body part (40), and the end cover assembly is characterized in that at least one positioning hole (63) is formed in the extension part (60), and the positioning hole (63) penetrates through the extension part (60) in the thickness direction of the extension part (60);
the end cap assembly (100) comprises an insulating member (10), the insulating member (10) comprising a body portion (11), the body portion (11) having a first surface (111) and a second surface (112), the first surface (111) and the second surface (112) being disposed opposite each other,
The insulating part (10) further comprises a containing groove (13), the containing groove (13) is concavely arranged on the second surface (112) of the body part (11),
the insulating part (10) further comprises at least one positioning column (14), the at least one positioning column (14) is convexly arranged on the bottom wall (134) of the accommodating groove (13),
the extension part (60) is accommodated in the accommodating groove (13), and each positioning column (14) is penetrated through one positioning hole (63); the plate body (40) is bent relative to the extension (60), and the plate body (40) covers the second surface (112) in the thickness direction of the insulating member (10);
the end cap assembly (100) is connected with the electrode assembly (300), the current collecting disc (200) is positioned between the end cap assembly (100) and the electrode assembly (300), and the disc body (40) is connected with the electrode assembly (300).
2. End cap assembly according to claim 1, wherein the number of the positioning posts (14) is two, and the two positioning posts (14) are arranged in a staggered manner along the length direction of the accommodating groove (13).
3. End cap assembly according to claim 2, wherein the end faces of the two positioning posts (14) facing away from the receiving groove (13) are flush with the second surface (112), the second surface (112) and the positioning posts (14) supporting the tray body (40).
4. End cap assembly according to claim 1, wherein the positioning posts (14) are cylindrical and have a diameter of 1.5mm-3.0mm.
5. End cap assembly according to claim 2, wherein the positioning column (14) comprises an end face facing away from the accommodating groove (13) and a circumferential side connected with the end face, a chamfer is formed at the connection of the end face of the positioning column (14) and the circumferential side of the positioning column (14), and the chamfer is arranged obliquely from the end face of the positioning column (14) to the circumferential side direction of the positioning column (14).
6. End cap assembly according to claim 2, wherein the cross-sectional area of the positioning posts (14) decreases gradually from the groove bottom wall (134) of the receiving groove (13) towards the second surface (112).
7. The end cap assembly according to any one of claims 1-6, wherein the insulating member (10) further comprises a first clamping portion (151) and a second clamping portion (152), the first clamping portion (151) and the second clamping portion (152) being respectively provided at two opposite groove side walls of the accommodating groove (13), a gap being provided between the first clamping portion (151) and the second clamping portion (152) and a groove bottom wall (134) of the accommodating groove (13), and the extending portion (60) being located at a gap between the first clamping portion (151) and the groove bottom wall (134) of the accommodating groove (13) and a gap between the second clamping portion (152) and the groove bottom wall (134) of the accommodating groove (13) in a thickness direction of the end cap assembly (100).
8. The end cap assembly according to claim 7, wherein the body portion (11) comprises a peripheral side surface (113) connecting between the first surface (111) and the second surface (112), the peripheral side surface (113) having a notch (135), the notch (135) being in communication with the receiving groove (13) along a length direction of the receiving groove (13); the first clamping part (151) and the second clamping part (152) are positioned on two opposite sides of the notch (135).
9. An energy storage device, characterized by comprising a housing (400), an electrode assembly (300), a current collecting disc (200) and an end cap assembly (100) according to any of claims 1-8, the housing (400) having an opening, the housing (400) being provided with a receiving cavity, the electrode assembly (300) being received in the receiving cavity, the end cap assembly (100) covering the opening, the disc portion (40) being connected to the electrode assembly (300) through the opening.
10. The energy storage device of claim 9, wherein the current collecting plate (200) further comprises a connecting portion (50), the connecting portion (50) connects the plate portion (40) and the extension portion (60), the connecting portion (50) is made of a flexible material, and the plate portion (40) is bendable relative to the extension portion (60) by bending the connecting portion (50).
11. The energy storage device according to claim 9, wherein the number of the positioning holes (63) is two, and the two positioning holes (63) are arranged in a staggered manner along the length direction of the extension portion (60).
12. The energy storage device according to claim 9, wherein the positioning hole (63) is circular, the aperture of the positioning hole (63) is larger than the diameter of the positioning column (14), and the difference between the aperture of the positioning hole (63) and the diameter of the positioning column (14) is 0.5mm-1.0mm.
13. The energy storage device according to claim 9, wherein a plurality of limiting pieces (631) are arranged in the positioning hole (63), the plurality of limiting pieces (631) extend from the hole wall of the positioning hole (63) to the axis direction of the positioning hole (63), and the plurality of limiting pieces (631) are arranged at intervals around the axis of the positioning hole (63); and through holes (632) are formed at the ends of the hole walls of the limiting sheets (631) far away from the positioning holes (63), and the hole diameters of the through holes (632) are smaller than the diameters of the positioning columns (14).
14. The energy storage device according to claim 9, wherein a plurality of limiting pieces (631) are disposed in the positioning hole (63), the plurality of limiting pieces (631) are formed by cutting slits from a hole wall of the positioning hole (63) along a radial direction of the positioning hole (63), and a slit (634) is disposed between each two limiting pieces (631), and along a thickness direction of the extension portion (60), the slit (634) penetrates through two opposite surfaces of the extension portion (60).
15. The energy storage device according to claim 13, wherein the extension portion (60) includes a first surface (61) and a second surface (62), the first surface (61) and the second surface (62) are disposed opposite to each other in a thickness direction of the extension portion (60), and the plurality of limiting pieces (631) are protruded from a wall of the positioning hole (63) and are disposed at intervals around an axis of the positioning hole (63); each limiting piece (631) is bent and extended from the first surface (61) to the direction of the second surface (62).
16. The energy storage device according to any one of claims 13 or 15, wherein the positioning column (14) is a plastic piece, the limiting piece (631) is a metal piece, an end of the limiting piece (631) abuts against a peripheral side face of the positioning column (14), and an end of the limiting piece (631) abuts against the peripheral side face of the positioning column (14) to form a notch.
17. The energy storage device according to claim 13, wherein the extending portion (60) includes two sides disposed opposite to each other along a width direction of the extending portion (60), the number of the positioning holes (63) is two, the two positioning holes (63) are disposed in a staggered manner along the width direction of the extending portion (60), and an extending direction of one of the plurality of limiting pieces (631) in each of the positioning holes (63) which is closest to the side of the extending portion (60) and has a shortest distance is perpendicular to a length direction of the extending portion (60).
18. The energy storage device according to claim 9, characterized in that the second face (62) of the extension (60) is convexly provided with a collar (638), which collar (638) surrounds the edge of the positioning hole (63).
19. Energy storage device according to claim 9, wherein the tray body (40) comprises a body (41) and welding protrusions (42), the body (41) having a central axis, the welding protrusions (42) protruding from the surface of the body (41) and being evenly distributed around the central axis.
20. A powered device comprising an energy storage device (1000) according to any of claims 9-19, the energy storage device (1000) being for powering the powered device.
21. A household energy storage system comprising an energy storage device (1000) according to any of claims 9-19, an electrical energy conversion device (4000) and a consumer load, said energy storage device (1000) storing electrical energy of said electrical energy conversion device (4000) and delivering electrical energy to said consumer load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310330860.0A CN116190673A (en) | 2023-03-30 | 2023-03-30 | End cover assembly, energy storage device, electric equipment and household energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310330860.0A CN116190673A (en) | 2023-03-30 | 2023-03-30 | End cover assembly, energy storage device, electric equipment and household energy storage system |
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| CN116190673A true CN116190673A (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310330860.0A Pending CN116190673A (en) | 2023-03-30 | 2023-03-30 | End cover assembly, energy storage device, electric equipment and household energy storage system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505155A (en) * | 2023-06-29 | 2023-07-28 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116706355A (en) * | 2023-08-03 | 2023-09-05 | 深圳海辰储能控制技术有限公司 | Top cap subassembly, battery device and energy storage system |
| CN117543143A (en) * | 2024-01-09 | 2024-02-09 | 深圳海辰储能科技有限公司 | End cover assembly, energy storage device and electric equipment |
-
2023
- 2023-03-30 CN CN202310330860.0A patent/CN116190673A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116505155A (en) * | 2023-06-29 | 2023-07-28 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116505155B (en) * | 2023-06-29 | 2023-12-26 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116706355A (en) * | 2023-08-03 | 2023-09-05 | 深圳海辰储能控制技术有限公司 | Top cap subassembly, battery device and energy storage system |
| CN116706355B (en) * | 2023-08-03 | 2024-01-23 | 深圳海辰储能控制技术有限公司 | Top cap subassembly, battery device and energy storage system |
| CN117543143A (en) * | 2024-01-09 | 2024-02-09 | 深圳海辰储能科技有限公司 | End cover assembly, energy storage device and electric equipment |
| CN117543143B (en) * | 2024-01-09 | 2024-04-09 | 深圳海辰储能科技有限公司 | End cover assembly, energy storage device and electric equipment |
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