CN116365175B

CN116365175B - Energy storage device and electric equipment

Info

Publication number: CN116365175B
Application number: CN202310635185.2A
Authority: CN
Inventors: 熊永锋; 陈志雄; 黄立炫
Original assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-07-28
Anticipated expiration: 2043-05-31
Also published as: CN116365175A

Abstract

An energy storage device and electric equipment, the energy storage device includes the adapter plate, card holds in the palm, lower plastic and cover plate; the switching piece comprises a pole connecting part, a pole lug connecting part and a fusing part, wherein the fusing part is connected with the pole connecting part and the pole lug connecting part and is provided with a first through hole which penetrates through; the clamping support is arranged on the fusing part and protrudes out of the plane where the fusing part is positioned, the clamping support seals the first through hole, and two opposite ends of the clamping support are respectively connected with the pole connection part and the pole lug connection part; the lower plastic is provided with a second through hole which penetrates through, the clamping support is opposite to the second through hole, and the part of the clamping support protruding out of the fusing part is accommodated in the second through hole and seals the second through hole; the apron is connected in the plastic one side of the switching piece that faces away from down, and the apron includes energy storage device identification feature, and energy storage device identification feature is just right with the card support through the second through-hole, and the card holds in the palm for insulating transparent material. The energy storage device that this application provided can have lower overall thickness, satisfies miniaturized design demand.

Description

Energy storage device and electric equipment

Technical Field

The application relates to the technical field of energy storage, in particular to an energy storage device and electric equipment.

Background

The energy storage device is used to store energy and release the energy when needed. The current energy storage device is mainly a rechargeable secondary battery, and the current common secondary battery mainly comprises a shell, an electrode assembly and an end cover assembly, wherein the electrode assembly is accommodated in the shell, the end cover assembly seals the shell, and a tab of the electrode assembly is connected with a pole on the cover plate assembly.

In the prior art, the lug of the electrode assembly and the pole column on the cover plate assembly are connected by the switching piece generally, and a special structure (a fusing part) is arranged on the switching piece. But set up special structure on the present design switching piece and all be comparatively thick and heavy, very easily produce the butt with the apron subassembly to increase energy storage device's thickness, be unfavorable for energy storage device miniaturized design demand.

Disclosure of Invention

The purpose of the application is to provide an energy storage device and electric equipment capable of improving safety performance.

In order to achieve the purpose of the application, the application provides the following technical scheme:

in a first aspect, the present application provides an energy storage device comprising a switching piece, a clamping bracket, a lower plastic and a cover plate; the switching piece comprises a pole connection part, a pole lug connection part and a fusing part, wherein the fusing part is connected with the pole connection part and the pole lug connection part, and is provided with a first through hole which penetrates through; the clamping support is arranged on the fusing part and protrudes out of the plane where the fusing part is located, the clamping support seals the first through hole, and two opposite ends are respectively connected with the pole connection part and the pole lug connection part; the lower plastic is provided with a second through hole which penetrates through, the clamping support is opposite to the second through hole, and the part, protruding out of the fusing part, of the lower plastic towards the clamping support is accommodated in the second through hole and seals the second through hole; the cover plate is connected to one side of the lower plastic back to the switching piece, the cover plate comprises an energy storage device identity recognition feature, the energy storage device identity recognition feature is opposite to the card support through the second through hole, and the card support is made of an insulating transparent material.

According to the energy storage device, the fusing part is connected between the lug connection parts of the pole connection parts, and the first through hole is formed in the fusing part, so that when the adapter piece passes through large current due to overcharge or abnormal phenomena, the fusing part can fuse in time to rapidly cut off the electric connection between the lug and the pole, and the energy storage device is prevented from being out of control; after the fusing part is fused, the pole connecting part and the pole lug connecting part can keep fixed relative positions through the clamping support, so that the position drift of the pole connecting part and the pole lug connecting part is prevented; and the second through hole is formed in the lower plastic, so that the second through hole is opposite to the clamping support, the part of the clamping support protruding out of the adapter can be contained in the second through hole, the adapter is prevented from being clamped with the lower plastic, the thickness between the adapter and the lower plastic is reduced, the volume of the energy storage device is reduced, and the energy density of the energy storage device is improved.

The cover plate can be a cover plate with a flat plate-shaped structure, and the energy storage device identification feature is designed in a different mode from other parts, for example, a specific special graph is formed. In this way, the identification characteristic of the energy storage device can be determined by means of visual inspection. After the cover plate is connected with the lower plastic, the identity recognition feature of the energy storage device is opposite to the second through hole, namely, the identity recognition feature of the energy storage device is opposite to the card holder. Therefore, when the card support is made of insulating transparent materials, a user can realize accurate installation by determining the identity recognition characteristic of the energy storage device and the superposition position of the card support. Through set up the energy storage device identification feature to the card support on the apron for with apron and lower plastic butt joint fast at the in-process of energy storage device processing, thereby improve machining efficiency.

In one embodiment, the height H1 of the card holder protruding from the adapter sheet and the thickness H2 of the lower plastic satisfy the relationship: H1/H2 is more than or equal to 0.6 and less than or equal to 2. Specifically, the height H1 of the card holder protruding from the transfer sheet should not be greater than the thickness H2 of the lower plastic, that is, the card holder does not protrude from the plane on which the fourth surface of the lower plastic is located, so as to avoid the card holder being too thick to be abutted against other components.

In one embodiment, the cross section of the card support is quadrilateral, the shape of the second through hole is quadrilateral, and the projection area S1 of the card support on the cover plate and the cross section area S2 of the second through hole satisfy the relation: S1/S2 is more than or equal to 0.9 and less than or equal to 1. Specifically, the cross section shape of the clamping support can be a round corner square, the outline shape of the second through hole can also be a square, and the requirement of the relation is to ensure that the clamping support and the second through hole have proper assembly dimensions, so that the conditions of unsmooth interference clamping or infirm small installation are avoided.

In an implementation mode, the adapter piece is further provided with a through connecting hole, the card support comprises a first card support portion, a second card support portion and a connecting column, the first card support portion and the second card support portion are respectively connected to two opposite sides of the adapter piece, and the connecting column penetrates through the connecting hole to respectively connect the first card support portion and the second card support portion. The connecting column penetrates through the connecting hole to connect the first clamping support portion and the second clamping support portion, so that the connection strength of the first clamping support portion and the second clamping support portion can be reinforced, and the reliability that the clamping support can provide tension after the fusing portion fuses is ensured.

In one embodiment, the number of the connecting holes and the number of the connecting columns are four, and the four connecting holes are arranged in a matrix. Through setting up the quantity of connecting hole and be four, and four connecting holes are the matrix arrangement for the card holds in the palm when connecting fused utmost point ear connecting portion and utmost point post connecting portion, and the atress of two is parallel and the atress is even, can avoid utmost point ear connecting portion or utmost point post connecting portion to lead to the secondary damage because of the atress is uneven.

In one embodiment, the connection hole and the first through hole satisfy the relation: F1/2D1 is more than or equal to 1.1 and less than or equal to 2.5; wherein F1 is the aperture of the first through hole in the length direction, and D1 is the shortest distance from the inner wall of the connecting hole to the inner wall of the first through hole. Specifically, F1 should be the maximum aperture of the first through hole in the length direction, and twice F1 should be the distance between the two connection holes opposite in the length direction and the first through hole, respectively. When the relation is satisfied, the distance between the first through hole and the connecting hole can be kept within a proper distance, and the situation that the distance between the first through hole and the connecting hole is too small due to the fact that the first through hole is too large can be avoided, so that the connecting structure between the first through hole and the connecting hole is prevented from being too weak, and the fact that the connecting structure between the first through hole and the connecting hole is not damaged when the card holder is installed is further ensured.

In one embodiment, the second card support part comprises a first section, a second section and a third section which are sequentially connected along the length direction of the card support, and the dimension of the second section in the width direction of the card support is smaller than that of the first section and the third section; the first segment and the second segment satisfy the relation: 1.2.ltoreq.J1/J2.ltoreq.2.5, wherein J1 is the width of the first section and J2 is the width of the second section. Through designing the second card holds in the palm the portion for first section, second section and the third section that the size is different, be favorable to in energy memory course of working, the anchor clamps utilize the size difference between second section and first section and the third section to change the operation piece to improve automated production's efficiency. When the above relation is satisfied, the size of the gap formed between the second section and the first section and between the second section and the third section can be in a proper range, thereby facilitating clamping of the clamp.

In one embodiment, the cross-sectional area S3 of the second segment and the area S4 of the first through hole satisfy the relationship: S3/S4 is more than or equal to 0.5 and less than or equal to 0.8. In particular, it will be appreciated that the second section may be used to close the first through hole, and that the dimensions of the second section and the first through hole are within a suitable range when the above relationship is satisfied. The second section may have a size slightly larger than the size of the first through hole, i.e. the projection of the second section onto the third surface partially coincides with the projection of the fusing part onto the third surface. Therefore, after the fusing part is fused, the fragments can be blocked and held by the second section, so that larger fragments are prevented from falling into the electrode assembly along the first notch and the second notch.

In one embodiment, the number of the connecting columns is plural, and the connecting columns are respectively connected to the first section and the third section, the length of the first section is not less than that of the third section, and the first section and the connecting columns satisfy the relation: L1/D2 is less than or equal to 2 and less than or equal to 4.25, wherein L1 is the length of the first section, and D2 is the diameter of the connecting column. When the above relation is satisfied, it is ensured that the diameter of the connecting post is smaller than the length of the first section (projection of the connecting post and the first section onto the cover plate, the first section being capable of completely covering the connecting post); therefore, the connecting column cannot be too large to occupy the space of the second section, and cannot be too small to cause weaker connection strength.

In one embodiment, the energy storage device identification feature comprises an information code for identifying information of the cover plate. The information code can be opposite to the card holder, and when the card holder is made of transparent materials, a user can observe the information code through the card holder. Alternatively, the information code may be a two-dimensional code, a bar code, or the like. The information code may include information about the model, lot, specification, etc. of the end cap assembly, and may also include information about the model, lot, specification, etc. of the corresponding energy storage device.

In one embodiment, the cross-sectional area S2 of the second through hole and the area S5 of the information code satisfy the relationship: S2/S5 is more than or equal to 1.1 and less than or equal to 1.5. Specifically, when the above relation is satisfied, the dimensions of the second through hole and the information code can be within a proper range, and other structures on the cover plate can not be affected even if the information code is ensured to have a sufficient dimension to be scanned by observation.

In one embodiment, a mating hole is formed in a surface of the card holder facing the identity recognition feature of the energy storage device, and the mating hole is opposite to the information code. The benefit of this setting lies in, can avoid first card to hold in the palm portion and apron butt, further avoids increasing energy memory's thickness. It can be understood that, after the mating hole is formed, the location of the mating hole is located opposite to one side of the second card support portion to form a convex lens. Therefore, when the information code is observed from the second clamping support part side, the information code can be amplified through the structure formed by the second matching holes, and the information code is convenient to observe.

In an implementation mode, the energy storage device further comprises a supporting piece, the supporting piece is located the switching piece faces away from one face of the first clamping support portion, the supporting piece comprises a first supporting portion, a second supporting portion and a supporting connecting portion, the first supporting portion and the second supporting portion are connected with the supporting connecting portion, the first through hole is located between the first supporting portion and the second supporting portion, the supporting connecting portion is connected with the lug connecting portion, and the first supporting portion and the second supporting portion are connected with the fusing portion and the pole connecting portion. Through setting up support piece at the back of changeing the piece, utilize support piece and second card to hold in the palm the portion and cooperate and form the cell body, can be used for holding the tiny metal particle that the fusing portion formed, avoid its drift everywhere to cause the inside short circuit of electrode subassembly.

In one embodiment, the energy storage device comprises an electrode assembly and a housing, wherein the electrode assembly is arranged in the housing, and the adapter piece is electrically connected to the electrode assembly.

In a second aspect, a powered device includes the energy storage device of the first aspect, the energy storage device supplying power to the powered device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of an energy storage device of an embodiment in a consumer energy storage location;

FIG. 2 is an exploded view of an energy storage device of an embodiment;

FIG. 3 is an exploded view of a portion of the structure of an energy storage device of one embodiment;

FIG. 4 is a schematic structural view of a switch piece of an embodiment;

FIG. 5 is a bottom view of the adapter plate and lower plastic of one embodiment;

FIG. 6 is a schematic cross-sectional view and a schematic partial enlarged view of a hinge plate and lower plastic of an embodiment;

FIG. 7A is a schematic diagram of a card holder according to one embodiment;

FIG. 7B is a schematic view of another side of the card holder according to one embodiment;

FIG. 8 is a top view of a transfer tab of an embodiment;

fig. 9 is a top view of a support of an embodiment.

Reference numerals illustrate:

100-energy storage device, 200-power generation equipment and 300-electric equipment;

10-end cover assembly, 11-cover plate, 111-energy storage device identity recognition feature, 12-lower plastic, 12P 1-third face, 12P 2-fourth face, 121 second through hole;

20-switching component, 21-switching piece, 21A-positive switching piece, 21B-negative switching piece, 21P 1-first face, 21P 2-second face, 211-pole connection part, 212-tab connection part, 213-fusing part, 2131-first fusing part, 2132-second fusing part, 214-first through hole, 21G connection hole, 21G 1-first connection hole, 21G 2-second connection hole, 22-card holder, 221-first card holder part, 222-second card holder part, 221G-mating hole, 22P 1-first wall, 2221-first notch, 22P 2-second wall, 2222-second notch, 222A-first section, 222B-second section, 222C-third section, 223 connection post, 23-support, 231-first support part, 232-second support part, 233-support connection part;

30-electrode assembly, 31-battery cell, 32-positive electrode lug and 33-negative electrode lug;

40-a housing;

x-length direction, Y-width direction, Z-thickness direction.

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 without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

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 the problems of strong intermittence, large fluctuation of wind energy, solar energy and the like generally exist, so that an unstable power grid can be caused, electricity consumption peak electricity is insufficient, electricity consumption valley electricity is too much, and the unstable voltage can damage the electric power, therefore, the problem of 'wind abandoning and light abandoning' is possibly caused because the electricity consumption requirement is insufficient or the power grid receiving capacity is insufficient, the problems need to be solved, and the problems need to depend on energy storage, namely, the electric energy is converted into other forms of energy to be stored through physical or chemical means, and the energy is converted into the electric energy to be released when needed. In short, the energy storage is similar to a large-scale "charge pal", when photovoltaic, wind energy are abundant, store the electric energy, release the electric power of energy storage when needing.

Taking electrochemical energy storage as an example, the embodiment of the application provides an energy storage device, wherein a chemical battery is arranged in the energy storage device, chemical elements in the chemical battery 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.

In this embodiment, a household energy storage scene in user side energy storage is taken as an example for illustration, and the energy storage device provided in this embodiment of the present application is not limited to a household energy storage scene.

Referring to fig. 1, the household energy storage system includes a power generation device 200 (photovoltaic panel), an electric device 300 (street lamp), an electric device (household appliance) and the like, and an energy storage device 100, which is a small energy storage box and can be installed on an outdoor wall in a wall hanging manner. In particular, the photovoltaic panel may convert solar energy into electric energy during low electricity price periods, and the energy storage device 100 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 may include, but is not limited to, a battery cell, a battery module, a battery pack, a battery system, and the like. When the energy storage device is a single battery, it may be a square battery.

Referring to fig. 2, the energy storage device 100 includes an end cap assembly 10, a switching assembly 20, an electrode assembly 30 and a housing 40, wherein the electrode assembly 30 is disposed in the housing 40, and the switching assembly 20 is electrically connected to the electrode assembly 30. The adapter assembly 20 is further connected with the end cover assembly 10, and the end cover assembly 10 covers the opening of the housing 40 and closes the housing 40.

Referring to fig. 2 and 3, the energy storage device 100 is in a rectangular parallelepiped shape, the energy storage device 100 has a length, a width and a thickness, and when each structure is described later, the extending direction of the length of the energy storage device 100 is taken as a length direction X, the extending direction of the width is taken as a width direction Y, and the extending direction of the thickness is taken as a thickness direction Z.

Alternatively, referring to fig. 2, the electrode assembly 30 includes a battery cell 31, a positive tab 32 and a negative tab 33, and the adapter assembly 20 is used to connect with the positive tab 32 and the negative tab 33, thereby outputting current to provide power.

Referring to fig. 2 and 3, the switching assembly 20 includes a switching piece 21, and may be specifically divided into a positive switching piece 21A and a negative switching piece 21B. Wherein the positive electrode tab 21A is electrically connected to the positive electrode tab 32, and the negative electrode tab 21B is electrically connected to the negative electrode tab 33. The tabs 21 in the following description are positive electrode tabs 21A.

Referring to fig. 3 and 4, the switching piece 21 includes a pole connection portion 211, a tab connection portion 212, and a fusing portion 213, the fusing portion 213 connects the pole connection portion 211 and the tab connection portion 212, and the fusing portion 213 is provided with a first through hole 214 therethrough. Specifically, the tab 21 is a sheet-metal structure comprising a first side 21P1 and a second side 21P2 opposite to each other, wherein the first side 21P1 faces the end cap assembly 10 and the second side 21P2 faces the electrode assembly. The tab connection portion 212 is used for electrically connecting with the positive tab 32, and the tab connection portion 211 is used for electrically connecting with the tab.

Alternatively, referring to fig. 4, the fusing part 213 may include a first fusing part 2131 and a second fusing part 2132, and the first fusing part 2131 and the second fusing part 2132 are disposed left and right in the width direction Y, and the first fusing part 2131 and the second fusing part 2132 have a separation distance of the first through hole 214. The opposite ends of the first fusing part 2131 and the second fusing part 2132 are connected to the tab connection part 211 and the tab connection part 212. It can be appreciated that the first through hole 214 may be formed by enclosing the first fusing part 2131, the second fusing part 2132, the pole connection part 211 and the tab connection part 212 together.

Alternatively, the first fusing part 2131 and the second fusing part 2132 may have the same size and thickness.

Referring to fig. 3 and 4, the adapter assembly 20 further includes a card holder 22, the card holder 22 is disposed on the fusing portion 213 and protrudes from a plane where the fusing portion 213 is located, the card holder 22 closes the first through hole 214, and opposite ends of the card holder are respectively connected to the pole connection portion 211 and the tab connection portion 212. Specifically, the material of the card holder 22 is different from the material of the switching piece 21, and may be a plastic material or an insulating material. The card holder 22 is disposed on the first surface 21P1 of the switching piece 21 and protrudes from the plane where the first surface 21P1 is located.

Alternatively, the length (the dimension in the longitudinal direction X) of the card holder 22 is larger than the length of the fuse portion 213. Thus, the card holder 22 can cross the fusing part 213 and be connected to the pole connection part 211 and the tab connection part 212, respectively. After the fusing part 213 breaks, the clamping support 22 can also connect the pole connection part 211 and the tab connection part 212, so that the switching piece cannot break completely.

Referring to fig. 3, the end cap assembly 10 includes a lower plastic 12, the lower plastic 12 is provided with a second through hole 121 therethrough, the card holder 22 is opposite to the second through hole 121, and a portion of the card holder 22 protruding from the fusing part 213 is accommodated in the second through hole 121. Specifically, the lower plastic 12 may be made of plastic, and the cover is disposed on the adapter assembly 20. The lower plastic 12 includes a third surface 12P1 and a fourth surface 12P2 opposite to each other, wherein the third surface 12P1 faces the switching piece 21, and the second surface 21P2 faces away from the electrode assembly.

Optionally, the profile shape of the second through hole 121 should be the same as the cross section of the card holder 22 and not smaller than the size of the card holder 22, so that the card holder 22 can be accommodated in the second through hole 121.

According to the energy storage device, the fusing part 213 is connected between the lug connection parts 212 of the pole connection parts 211, and the first through hole 214 is formed in the fusing part 213, so that when the high current passes through the switching piece 21 due to overcharge or abnormal phenomena, the fusing part 213 can fuse in time to rapidly cut off the electric connection between the lug and the pole, and the thermal runaway of the energy storage device 100 is prevented; after the fusing part 213 fuses, the pole connection part 211 and the tab connection part 212 can keep the relative positions fixed through the clamping support 22, so that the position drift of the pole connection part 211 and the tab connection part 212 is prevented; and the second through hole 121 is formed on the lower plastic 12, so that the second through hole 121 is opposite to the clamping support 22, and the part of the clamping support 22 protruding from the adapter can be accommodated in the second through hole 121, so that the adapter is prevented from being clamped with the lower plastic 12, the thickness between the adapter piece 21 and the lower plastic 12 is reduced, the volume of the energy storage device is reduced, and the energy density of the energy storage device is improved.

In one embodiment, referring to fig. 2 and 5, the end cap assembly 10 further includes a cover plate 11, the cover plate 11 is connected to a side of the lower plastic 12 facing away from the rotation piece 21, the cover plate 11 includes an energy storage device identification feature 111, the energy storage device identification feature 111 faces the card support 22, and the card support 22 is made of an insulating transparent material.

Specifically, the end cap assembly 10 includes a fifth face that faces the fourth face 12P2. It will be appreciated that the cover plate 11 may be a cover having a flat plate-like structure, and the energy storage device identification feature 111 may be designed differently from other locations, such as having a specific special pattern. In this way, the energy storage device identification feature 111 can be determined by visual inspection. After the cover plate 11 and the lower plastic 12 are connected, the energy storage device identification feature 111 should be opposite to the second through hole 121, that is, the energy storage device identification feature 111 is opposite to the card holder 22. Therefore, when the card holder 22 is made of insulating transparent material, a user can accurately install the card holder 22 by determining the overlapping position of the identity recognition feature 111 of the energy storage device.

By arranging the energy storage device identity recognition feature 111 opposite to the card support 22 on the cover plate 11, the cover plate 11 and the lower plastic 12 are quickly abutted in the processing process of the energy storage device 100, so that the processing efficiency is improved.

In one embodiment, referring to fig. 5 and 6, the height H1 of the card holder 22 protruding from the rotation piece 21 and the thickness H2 of the lower plastic 12 satisfy the following relationship: H1/H2 is more than or equal to 0.6 and less than or equal to 2. Specifically, H1/H2 may be 0.6, 0.8, 1, 1.2, 1.4, 1.6, 1.8, 2. The height H1 of the card holder 22 protruding from the transfer sheet 21 should be not greater than the thickness H2 of the lower plastic 12, which means that the card holder 22 does not protrude from the plane of the fourth surface 12P2 of the lower plastic 12, so as to avoid the card holder 22 being too thick to abut against other components. When the lower limit of the relation is lower than the lower limit, the card holder 22 is too thin, and when the fusing part 213 fuses, the drawing force of the card holder 22 on the connection of the pole connection part 211 and the pole piece is insufficient, so that the card holder is broken and broken slag is generated, thereby influencing the use of the electrode assembly; when the upper limit of the above relation is exceeded, it is indicated that the card holder 22 is too thick, and the height of the card holder 22 exceeds the height of the fourth surface 12P2 of the lower plastic 12, thereby affecting the mounting of other parts and causing the overall thickness of the energy storage device 100 to be too thick.

In one embodiment, referring to fig. 5 and fig. 7A, the cross section of the card holder 22 is quadrilateral, the shape of the second through hole 121 is quadrilateral, and the projected area S1 of the card holder 22 and the cross sectional area S2 of the second through hole 121 satisfy the relationship: S1/S2 is more than or equal to 0.9 and less than or equal to 1. Specifically, S1/S2 may be 0.9, 0.91, 0.92, 0.94, 0.95, 0.98, 1. The projection surface of the card support 22 may be a rounded square, and the profile shape of the second through hole 121 may also be a square, so as to satisfy the above relation, so as to ensure that the card support 22 and the second through hole 121 have appropriate assembly dimensions, and avoid the situations of unsmooth interference clamping or infirm installation. When the size of the second through hole 121 is larger than the lower limit of the above relation, the card holder 22 is accommodated in the second through hole 121 to form a larger virtual position, and shake is more likely to occur in the process of transporting the energy storage device 100, so that the adaptor and the lower plastic 12 are loosened; when the upper limit of the above relation is exceeded, it is indicated that the size of the second through hole 121 is too small, which results in an increase in difficulty in mounting the card holder 22 and the second through hole 121, and also, since the card holder 22 and the lower plastic 12 are both made of plastic materials, the strength of mutual extrusion is increased, which is liable to cause damage to both.

In an embodiment, referring to fig. 4 and fig. 7B, the adapter piece 21 is further provided with a through connection hole 21G, the card holder 22 includes a first card holder portion 221, a second card holder portion 222 and a connection post 223, the first card holder portion 221 and the second card holder portion 222 are respectively connected to opposite sides of the adapter piece 21, and the connection portion passes through the connection hole 21G to respectively connect the first card holder portion 221 and the second card holder portion 222.

Specifically, the pole connection portion 211 is provided with a first connection hole 21G1, the tab connection portion 212 is provided with a second connection hole 21G2, the first connection hole 21G1 and the second connection hole 21G2 are disposed opposite to each other in the length direction X, and the first through hole 214 is located between the first connection hole 21G1 and the second connection hole 21G 2. The first clamping portion 221 is disposed on the first surface 21P1, and the second clamping portion 222 is disposed on the second surface 21P 2; the first and second receptacles 221, 222 are mated by a connecting post 223. The number of the connecting columns 223 is identical to that of the connecting holes 21G, that is, one connecting column 223 is respectively arranged in each of the first connecting holes 21G1 and the second connecting holes 21G2, so that the pole connecting portion 211 and the pole piece connecting portion can be fixed after the first clamping support portion 221 and the second clamping support portion 222 are in butt joint.

By providing the connection post 223 to pass through the connection hole 21G to connect the first and second clamping portions 221 and 222, the connection strength of the first and second clamping portions 221 and 222 can be reinforced, and the reliability of the tension force provided by the clamping portion 22 after the fusing portion 213 fuses can be ensured.

Alternatively, the connecting hole 21G is circular in shape and the connecting post 223 is cylindrical in shape. The benefit of this design is that the sharp connection point between the catch 22 and the adapter piece 21 can be reduced, so that the surface catch 22 causes damage to the adapter piece 21.

In one embodiment, referring to fig. 4 and 8, the number of the connection holes 21G and the connection columns 223 is four, and the four connection holes 21G are arranged in a matrix. Specifically, the number of the first connection holes 21G1 and the number of the second connection holes 21G2 are two. It is understood that the first and second connection holes 21G1 and 21G2 are identical in shape and size, so the first and second connection holes 21G1 and 21G2 can be considered identical, so the number of connection holes 21G and corresponding connection posts 223 is four.

Alternatively, two connection holes 21G located on the same side as the first through hole 214 are oppositely disposed in the width direction Y. Therefore, when two connecting holes 21G on the same side of the first through hole 214 are the first connecting hole 21G1, two connecting holes 21G2 on the opposite side are the second connecting hole 21G2, and since the first connecting hole 21G1 and the second connecting hole 21G2 are oppositely arranged, the four connecting holes 21G are arranged in a matrix.

Through setting up the quantity of connecting hole 21G and be four, and four connecting hole 21G are the matrix and arrange for card holds in the palm 22 when connecting the utmost point ear connecting portion 212 and the utmost point post connecting portion 211 of fusing, the atress of two is parallel and the atress is even, can avoid utmost point ear connecting portion 212 or utmost point post connecting portion 211 to lead to the secondary damage because of the atress is uneven.

In one embodiment, referring to fig. 8, the connection hole 21G and the first through hole 214 satisfy the relation: F1/2D1 is more than or equal to 1.1 and less than or equal to 2.5; wherein F1 is the length of the first through hole 214, and D1 is the shortest distance from the inner wall of the connecting hole 21G to the inner wall of the first through hole 214.

Specifically, F1/2D1 may be 1.1, 1.3, 1.5, 1.7, 1.9, 2.1, 2.3, 2.5. F1 should be the maximum aperture of the first through hole 214 in the length direction X, and D1, which is twice the distance between the two connection holes 21G opposite in the length direction X and the first through hole 214, respectively. When the above relation is satisfied, the distance between the first through hole 214 and the connection hole 21G can be kept within a suitable distance, and the too small distance between the first through hole 214 and the connection hole 21G caused by the too large distance can be avoided, so that the connection structure between the first through hole 214 and the connection hole 21G is prevented from being too weak, and the connection structure between the first through hole 214 and the connection hole 21G is further ensured not to be damaged when the card holder 22 is mounted. When the lower limit of the above relation is lower, it is indicated that the distance between the connecting hole 21G and the first through hole 214 is too short, so that the connecting structure between the connecting hole 21G and the first through hole 214 is too weak, and the connecting structure is easily damaged by being squeezed by the connecting post 223 of the card holder 22 when the card holder 22 is mounted; when the upper limit of the above relation is exceeded, it is indicated that the pitch of the first through hole 214 is too small, and when the first through hole 214 is designed to be square, the difficulty of fusing the fusing part 213 increases.

In an embodiment, referring to fig. 7A, the second card supporting portion 222 includes a first section 222A, a second section 222B and a third section 222C sequentially connected along the length direction X of the card support 22, and the second section 222B has a smaller dimension in the width direction Y of the card support 22 than the first section 222A and the third section 222C. Specifically, the projection of the second card supporting portion 222 on the second surface 21P2 may be in an "i" shape.

It can be understood that the second card supporting portion 222 includes a first wall surface 22P1 and a second wall surface 22P2 opposite to each other in the width direction Y of the card support 22, the first wall surface 22P1 is provided with a first notch 2221 recessed in the width direction Y, and the second wall surface 22P2 is provided with a second notch 2222 recessed in the width direction Y. That is, the first section 222A, the second section 222B, and the third section 222C collectively enclose the first notch 2221 and the second notch 2222.

Alternatively, the first through-hole 214 is no larger in size than the second section 222B, i.e., the second section 222B can overlie the first through-hole 214 and enclose the first through-hole 214. The connection post 223 may be connected to the first and third sections 222A and 222C, respectively, so that the first connection hole 21G1 may be opposite to the first section 222A and the second connection hole 21G2 may be opposite to the third section 222C.

By designing the second clamping portion 222 to be the first segment 222A, the second segment 222B and the third segment 222C with different sizes, the clamp is beneficial to transferring the adaptor 21 by utilizing the size difference between the second segment 222B and the first segment 222A and the third segment 222C in the processing process of the energy storage device 100, so that the efficiency of automatic production is improved.

In one embodiment, referring to fig. 7A, the first segment 222A and the second segment 222B satisfy the relationship: 1.2.ltoreq.J1/J2.ltoreq.2.5, wherein J1 is the width of the first section 222A and J2 is the width of the second section 222B. Specifically, J1/J2 may be 1.2, 1.3, 1.5, 1.7, 1.9, 2.1, 2.3, 2.5. The dimensions of the gap formed between the second segment 222B and the first and third segments 222A, 222C may be within a suitable range to facilitate clamping by the clamp when the above relationship is satisfied. Below the lower limit of the above relation, it is indicated that the second section 222B has too large a width, resulting in too shallow a depth of the gap formed, and the range of the clamp can hold is limited, so that the transfer tab 21 is easily dropped from the clamp during transfer of the transfer tab 21; when the upper limit of the above relation is exceeded, the width of the second section 222B is too small, so that the second section 222B cannot completely close the first through hole 214, which easily causes fragments to pass through a portion of the first through hole 214 that is not closed after fusing, thereby affecting other parts.

In one embodiment, referring to fig. 7A and 8, the cross-sectional area S3 of the second section 222B and the area S4 of the first through hole 214 satisfy the relationship: S3/S4 is more than or equal to 0.5 and less than or equal to 0.8. Specifically, S3/S4 may be 0.5, 0.6, 0.7, 0.8. It will be appreciated that the second section 222B may be used to close the first through hole 214, and that the dimensions of the second section 222B and the first through hole 214 are within a suitable range when the above relationship is satisfied. So that the size of the second section 222B may be slightly larger than the size of the first through hole 214, that is, the projection of the second section 222B on the third face 12P1 partially coincides with the projection of the fusing part 213 on the third face 12P 1. In this way, after the fusing part 213 is fused, the fragments can be blocked by the second section 222B, so that the larger fragments are prevented from falling into the electrode assembly along the first notch 2221 and the second notch 2222. Below the lower limit of the above relationship, the second section 222B is undersized, and after the fuse portion 213 is broken, the second section 222B may not be able to resist the fragments; when the upper limit of the above relation is exceeded, the second section 222B is oversized, that is, the first notch 2221 and the second notch 2222 are smaller, so that the space reserved for machine clamping is smaller, the clamping difficulty is increased, and the rotation sheet 21 is easy to fall off in the clamping process.

In one embodiment, referring to fig. 6, the card holder 22 is further at least partially received in the first through hole 214 and connects the first card holder 221 and the second card holder 222. It will be appreciated that the receptacles 22 may be integrally injection molded onto the tabs by a mold, so that the receptacles 22 will at least partially enter the first through holes 214 during the molding process. The portion of the preferred card holder 22 received in the first through hole 214 is the same volume as the first through hole 214.

In one embodiment, referring to fig. 6, the number of the connecting columns 223 is plural, and the connecting columns are respectively connected to the first section 222A and the third section 222C, the length of the first section 222A is not less than that of the third section 222C, and the first section 222A and the connecting columns 223 satisfy the relationship: 2.ltoreq.L1/D2.ltoreq.4.25, where L1 is the length of the first section 222A and D2 is the diameter of the connecting column 223.

Specifically, L1/D2 may be 2, 2.1, 2.3, 2.5, 2.7, 2.9, 3, 3.1, 3.3, 3.5, 3.7, 3.9, 4.1, 4.25. The number of the connection posts 223 is four, two of which connect the first section 222A and the first card supporting portion 221, and the other two of which connect the second section 222B and the first card supporting portion 221. Preferably, the first section 222A and the third section 222C are the same length. Satisfying the above relation, it is possible to ensure that the diameter of the connecting post 223 is smaller than the length of the first section 222A (the projection of the connecting post 223 and the first section 222A on the cover plate, the first section 222A being able to completely cover the connecting post 223); so that the connecting post 223 is not excessively large to occupy the space of the second section 222B, and so that the connecting post 223 is not excessively small to cause weak connection strength. When the diameter of the connecting post 223 is smaller than the lower limit of the above relation, the connecting post 223 is too large, which tends to cause the connecting post 223 to be too close to the second section 222B, so that the distance between the connecting hole 21G and the first through hole 214 is too close, which tends to cause the breakage of the connecting hole 21G. When the upper limit of the above relation is exceeded, it is indicated that the diameter of the connection post 223 is too small, and the connection post 223 is too thin, so that the connection strength is insufficient, and breakage between the first and second clamping portions 221 and 221 is easily caused.

In one embodiment, the energy storage device identification feature 111 includes an information code (not shown) that identifies information about the cover plate 11. An information code is provided on the fifth face and is located on the energy storage device identification feature 111. The information code can be opposite to the card holder 22, and when the card holder 22 is made of transparent material, the user can observe the information code through the card holder 22. Alternatively, the information code may be a two-dimensional code, a bar code, a pattern, tag information, or the like. The information code may include information of the model, lot, specification, etc. of the end cap assembly 10, and may also include information of the model, lot, specification, etc. of the corresponding energy storage device 100.

In one embodiment, the cross-sectional area S2 of the second through hole 121 and the area S5 of the information code satisfy the relation: S2/S5 is more than or equal to 1.1 and less than or equal to 1.5. Specifically, S2/S5 may be 1.1, 1.2, 1.3, 1.4, 1.5. The area S5 of the information code is not shown in the figure because of the diversity of the information code (the shape has a diversity), but it is understood that the area S5 of the information code should be the actual area occupied on the cover plate 11. When the above relation is satisfied, the second through-hole 121 and the information code can be sized within a proper range, and other structures on the cover plate 11 can be kept from being affected even when the information code is sufficiently sized to be scanned by observation. When the area of the information code is larger than the lower limit of the relation, the area of the information code is larger, so that the information code is easy to affect other structures in the process of manufacturing the information code, or patterns are easy to be lost due to the influence of other structures; when the upper limit of the relation is exceeded, the area of the information code is too small, so that the observation is not facilitated, and meanwhile, the difficulty of the manufacturing process is correspondingly increased.

In one embodiment, referring to fig. 7B, a mating hole 221G is disposed on a surface of the card holder 22 facing the identity recognition feature 111 of the energy storage device, and the mating hole 221G is opposite to the information code. Specifically, a surface of the first card supporting portion 221 facing the fifth surface is recessed inward to form a mating hole 221G, and the mating hole 221G does not penetrate through the first card supporting portion 221. The benefit of this arrangement is that the first clamping portion 221 and the cover plate 11 are prevented from abutting, further avoiding an increase in the thickness of the energy storage device 100. It can be understood that, after the mating hole 221G is formed, the location of the mating hole 221G is opposite to the side of the second card supporting portion 222 to form a convex lens. Thus, when the information code is viewed from the second card holder portion 222 side, the information code can be enlarged by the structure formed by the second fitting hole 221G, thereby facilitating the observation.

In an embodiment, referring to fig. 9, the adapter assembly 20 further includes a support member 23, the support member 23 is located on a surface of the adapter piece 21 opposite to the first clamping portion 221, the support member 23 includes a first support portion 231, a second support portion 232, and a support connection portion 233, the first support portion 231 and the second support portion 232 are connected to each other to support the connection portion 233, the first through hole 214 is located between the first support portion 231 and the second support portion 232, the support connection portion 233 is connected to the tab connection portion 212, and the first support portion 231 and the second support portion 232 are both connected to the fusing portion 213 and the pole connection portion 211. Through setting up support piece 23 at the back of changeing the piece, utilize support piece 23 and second card to hold in the palm portion 222 and cooperate and form the cell body, can be used for holding the tiny metal granule that fusing portion 213 formed, avoid its drift everywhere to cause the inside short circuit of electrode subassembly.

Specifically, the first supporting portion 231 and the second supporting portion 232 are connected to the same side of the supporting connection portion 233, and the first supporting portion 231 and the second supporting portion 232 are disposed at opposite intervals, i.e. the supporting member 23 may have a "C" shape. The first support portion 231 and the second support portion 232 are elongated, and the first support portion 231 and the second support portion 232 may span the tab connection portion 212, the fusing portion 213, and the post connection portion 211. And the second catch portion 222 is located between the first supporting portion 231 and the second supporting portion 232.

Alternatively, the first support 231 should overlap with a part of the first fusing part 2131 and the second support 232 should overlap with a part of the second fusing part 2132, based on the above embodiments. Thus, after the first fusing part 2131 and the second fusing part 2132 are fused, the first supporting part 231 and the second supporting part 232 can respectively support broken fragments.

Based on the foregoing energy storage device 100 according to the embodiments of the present application, the embodiments of the present application further provide an electric device, including the energy storage device 100 in the embodiments of the present application, where the energy storage device 100 is configured to supply power to the electric device.

In the description of the embodiments of the present application, it should be noted that, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to the orientation or positional relationship described based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The above disclosure is illustrative of a preferred embodiment of the present application and is not intended to limit the scope of the claims herein, but rather to limit the scope of the claims herein.

Claims

1. An energy storage device is characterized by comprising a switching piece, a clamping support, lower plastic and a cover plate;

the switching piece comprises a pole connection part, a pole lug connection part and a fusing part, wherein the fusing part is connected with the pole connection part and the pole lug connection part, and is provided with a first through hole which penetrates through;

the clamping support is arranged on the fusing part and protrudes out of the plane where the fusing part is located, the clamping support seals the first through hole, and two opposite ends of the clamping support are respectively connected with the pole connection part and the pole lug connection part;

the lower plastic is provided with a second through hole which penetrates through, the clamping support is opposite to the second through hole, and the part, protruding out of the fusing part, of the lower plastic towards the clamping support is accommodated in the second through hole and seals the second through hole;

the cover plate is connected to one side of the lower plastic, which is opposite to the transfer sheet, and comprises an energy storage device identity recognition feature, wherein the energy storage device identity recognition feature is opposite to the card support through the second through hole, and the card support is made of an insulating transparent material; the energy storage device identity recognition feature comprises an information code, wherein the information code is used for recognizing information of the cover plate;

The projection area S1 of the clamping support on the cover plate and the cross section area S2 of the second through hole meet the relation: S1/S2 is more than or equal to 0.95 and less than or equal to 1; the cross-sectional area S2 of the second through hole and the area S5 of the information code satisfy the relation: S2/S5 is more than or equal to 1.1 and less than or equal to 1.5.

2. The energy storage device of claim 1, wherein the height H1 of the clip protruding from the adaptor and the thickness H2 of the lower plastic satisfy the relationship: H1/H2 is more than or equal to 0.6 and less than or equal to 2.

3. The energy storage device of claim 1, wherein the adapter plate is further provided with a through connection hole, the card support comprises a first card support portion, a second card support portion and a connection post, the first card support portion and the second card support portion are respectively connected to two opposite sides of the adapter plate, and the connection post penetrates through the connection hole to respectively connect the first card support portion and the second card support portion.

4. The energy storage device of claim 3, wherein the number of said connecting holes and said connecting posts is four, and four of said connecting holes are arranged in a matrix.

5. The energy storage device of claim 3, wherein the connection hole and the first through hole satisfy the relationship: F1/2D1 is more than or equal to 1.1 and less than or equal to 2.5; wherein F1 is the aperture of the first through hole in the length direction, and D1 is the shortest distance from the inner wall of the connecting hole to the inner wall of the first through hole.

6. The energy storage device of claim 3, wherein the second receptacle portion comprises a first section, a second section, and a third section connected in sequence along a length direction of the receptacle, the second section having a smaller dimension in a width direction of the receptacle than the first section and the third section; the first segment and the second segment satisfy the relation: 1.2.ltoreq.J1/J2.ltoreq.2.5, wherein J1 is the width of the first section and J2 is the width of the second section.

7. The energy storage device of claim 6, wherein the cross-sectional area S3 of the second segment and the area S4 of the first through hole satisfy the relationship: S3/S4 is more than or equal to 0.5 and less than or equal to 0.8.

8. The energy storage device of claim 6, wherein the number of connecting posts is plural and is connected to the first section and the third section, respectively, the length of the first section is not less than the length of the third section, and the first section and the connecting posts satisfy the relationship: L1/D2 is less than or equal to 2 and less than or equal to 4.25, wherein L1 is the length of the first section, and D2 is the diameter of the connecting column.

9. The energy storage device of claim 1, wherein a mating hole is formed in a face of the card holder facing the identification feature of the energy storage device, the mating hole being opposite to the information code.

10. The energy storage device of claim 3, further comprising a support member, wherein the support member is located on a surface of the adapter plate opposite to the first clamping portion, the support member comprises a first support portion, a second support portion and a support connection portion, the first support portion and the second support portion are connected with the support connection portion, the first through hole is located between the first support portion and the second support portion, the support connection portion is connected with the tab connection portion, and the first support portion and the second support portion are both connected with the fusing portion and the pole connection portion.

11. The energy storage device of claim 1, comprising an electrode assembly and a housing, the electrode assembly disposed within the housing, the interposer web electrically connected to the electrode assembly.

12. A powered device comprising an energy storage device as claimed in any one of claims 1-11, the energy storage device powering the powered device.