CN216213951U - Current collecting disc, battery monomer, battery and power consumption device - Google Patents

Abstract

The application discloses current collecting disc, battery monomer, battery and power consumption device. The current collecting plate includes: the tray body comprises a welding area and a deformation area, the welding area is used for being connected with a lug of a battery monomer in a welding mode, and the deformation area is made of a shape memory material; and the deformation area is reduced after the deformation area is heated to the preset temperature. Among the technical scheme of this application embodiment, set up to the deformation zone through the subregion with the disk body, and use shape memory material to make with this deformation zone, receive external force striking at the battery monomer and take place the short circuit and when producing a large amount of heats and gas, it can make the deformation zone thermal deformation that shape memory material made to have heat and gas, the area diminishes, form the passageway that supplies gas exhaust in the opening part of the free casing of battery, and then will carry a large amount of thermal gas and discharge fast, avoid appearing the burning, the condition of getting on fire takes place.

Description

Current collecting disc, battery monomer, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a current collecting disc, a battery monomer, a battery and an electric device.

Background

Lithium batteries have been rapidly developed as an important one of secondary batteries.

In the prior art, when a single battery suffers certain impact such as needling, the internal short circuit of the single battery can be caused, a large amount of heat and gas are emitted in a short time, however, the current single battery cannot rapidly discharge the heat and the gas, and then combustion, fire, even explosion and other larger consequences are possible to happen.

Therefore, further solution to the above technical problems is needed.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the present application provides a current collecting plate, a top cap assembly, a battery and an electric device, which can solve the problem that the current collecting plate affects the internal heat and gas emission of a battery cell when the battery cell is short-circuited.

In a first aspect, the present application provides a collector plate comprising:

the tray body comprises a welding area and a deformation area, the welding area is used for being connected with a lug of a battery monomer in a welding mode, and the deformation area is made of shape memory materials;

wherein, the deformation area is reduced after the deformation area is heated to the preset temperature.

Among the technical scheme of this application embodiment, set up to the deformation zone through the subregion with the disk body, and use shape memory material to make with this deformation zone, receive external force striking at the battery monomer and take place the short circuit and when producing a large amount of heats and gas, it can make the deformation zone thermal deformation that shape memory material made to have heat and gas, the area diminishes, form the passageway that supplies gas exhaust in the opening part of the free casing of battery, and then will carry a large amount of thermal gas and discharge fast, avoid appearing the burning, the condition of getting on fire takes place.

In some embodiments, the deformation zone includes two portions, one on each side of the weld zone.

This embodiment is through distributing deformation zone in two regions of disk body to be located the both sides of weld zone, then can guarantee the welding area of weld zone, and make the weld zone occupy the middle part of disk body, and then guarantee that the region that disk body and utmost point ear are connected is located the disk body and is close to central point and put or central position, can not change original disk body and the hookup location of utmost point ear, can adopt original technology of connecting disk body and utmost point ear to carry out being connected of the two.

In some embodiments, the two sides of the welding area are respectively provided with a V-shaped missing area, and the two parts of the deformation area are in fan shapes and are respectively connected with the V-shaped missing areas.

In the embodiment of the application, the V-shaped missing area can form two linear connecting edges, and the deformation area is arranged in a fan shape, so that the deformation area has a larger area while the deformation area is ensured to have two linear connecting edges matched with the V-shaped missing area, and the alignment and connection between the welding area and the deformation area can be facilitated; in addition, the tray body of this structure may have a circular shape to be applied to a cylindrical battery.

In some embodiments, the two portions of the deformation zone are symmetrically connected on either side of the weld zone. The deformation zones are symmetrically arranged, so that the deformation zones and the welding zone can be connected together by using a tool, and interference during tool operation for connecting the deformation zones and the welding zone when the two deformation zones are adjacent to each other is avoided; in addition, the symmetrically arranged deformation zones can also ensure that the whole welding zone is in an axisymmetric shape, so that the welding zone is convenient to process.

In some embodiments, the current collecting disk of embodiments of the present application further comprises: a tail body connected with the welding area; wherein, the afterbody is used for being connected with top cap assembly's utmost point post.

The tail body is connected with the welding area in the embodiment of the application, so that the current collecting disc can be used as a part for conducting current, and the tail body and the welding area of the disc body can be integrally formed, so that the processing of the current collecting disc is facilitated.

In some embodiments, the deformation zone and the welding zone are one of welded, riveted, or clamped connections. The welding mode can not only ensure the connection stability of the deformation area and the welding area, but also ensure the tightness after the deformation area and the welding area are connected, thereby being beneficial to the transmission of current.

In some embodiments, a portion of the edge of the deformation zone is merged and welded with a portion of the edge of the weld zone;

or part of the edge of the deformation area and part of the edge of the welding area are overlapped and riveted through a rivet;

or, a part of the edge of the deformation area is provided with a groove to accommodate and clamp the part of the edge of the welding area.

In some embodiments, the shape memory material is a thermal bimetal or a shape memory alloy.

Use hot bimetal or shape memory alloy as the material of deformation zone in this application embodiment, then can guarantee the whole electric conductive property of current collecting disc, make the deformation zone can take place to warp under the effect of high temperature simultaneously, the area diminishes, reduces the cover area to the free casing open-ended of battery, forms exhaust passage, and then makes the gas in the battery monomer carry a large amount of heats and discharge fast.

In some embodiments, the deformation region comprises a stacked active layer and passive layer; wherein, the active layer is made of iron-chromium-nickel alloy, and the passive layer is made of iron-nickel alloy.

By selecting the material as the material of the deformation zone, the deformation zone can be ensured to have good thermal shrinkage deformation performance and good electric conduction performance.

In some embodiments, the material of the deformation zone is one of a nickel-titanium-based alloy, a copper-nickel-based alloy, a copper-aluminum-based alloy, a copper-zinc-based alloy, Fe-Mn-Si, and Fe-Pd.

Also, by using the above-mentioned material as the material of the deformation region, it is possible to ensure that the deformation region has good heat shrinkage deformation properties, and has good electrical conductivity properties.

In a second aspect, the present application provides a battery cell comprising: the current collecting disc in the above embodiments.

In a third aspect, the present application provides a battery comprising: the battery cell in the above embodiment.

In a fourth aspect, the present application provides an electric device, which includes the battery in the above embodiments, wherein the battery is used for providing electric energy.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic structural view of a weld region and a deformation region of a current collecting plate according to some embodiments of the present disclosure;

FIG. 2 is a schematic view of a first perspective structural view of a weld region and a deformation region of a manifold disk according to some embodiments of the present disclosure;

FIG. 3 is a structural schematic diagram of a second perspective view of a weld region and a deformation region of a current collector disk according to some embodiments of the present application;

FIG. 4 is a cross-sectional view taken at location A-A of FIG. 3;

FIG. 5 is a schematic view of a first perspective structure of a bond pad and a deformation region of a manifold disk in accordance with certain embodiments of the present application;

FIG. 6 is a schematic view of a second perspective of a clamping connection of a weld region and a deformation region of a current collector plate according to some embodiments of the present application;

fig. 7 is a schematic structural diagram of a battery cell according to some embodiments of the present application.

The reference numbers in the detailed description are as follows:

the collector plate 1, the plate body 11, the welding region 111, the deformation region 112, the groove 1121, and the tail body 12;

the top cap assembly 2, the shell 3 and the cell assembly 4.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: there are three cases of A, A and B, and B. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the prior art, along with the development of clean energy, more and more devices use electric energy as driving energy, and then are rapidly developed as power batteries which can store more electric energy and can be repeatedly charged and discharged, such as lithium ion batteries. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and multiple fields such as military equipment and aerospace.

The inventor of the present invention has noticed that when a battery cell of a power battery is impacted, for example, when a needle pricks, a short circuit may be caused inside the battery cell, a strong chemical reaction occurs in the battery cell after the short circuit to generate a large amount of heat and gas, the generated heat needs to be rapidly discharged out of the battery cell along with the gas, otherwise, the heat may be accumulated to cause the combustion, ignition and even burst of the battery cell, and further, the combustion, ignition and even burst of the power battery may be caused. However, the current battery cell includes a top cover assembly, a current collecting plate, a casing, an electric core assembly and other functional components, the current collecting plate is covered on the opening of the casing, and then connected with the tabs of the electric core assembly in the casing, and connected with the electrodes on the top cover assembly, and the current collecting plate can block the discharge of a large amount of heat-carrying gas inside the battery cell, thereby causing the above serious consequences.

In order to solve the problems, the inventor researches and discovers that the region, which is not connected with the lug of the single battery, on the current collecting disc can be made of the shape memory material, so that when the shape memory material is heated and reaches the deformation temperature of the shape memory material, the region, which is partially made of the shape memory material, on the current collecting disc can be contracted and deformed, a channel for discharging gas is further generated at the top of the shell of the single battery, the gas carrying a large amount of heat is quickly discharged, the heat and gas accumulation caused by short circuit is avoided, and the situations of burning, firing and even explosion after the single battery is impacted are effectively avoided.

The current collecting disc disclosed by the embodiment of the application can be applied to cylindrical battery cells and can also be applied to battery cells in other shapes, such as rectangular parallelepiped shapes.

The battery cell disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited thereto. The power supply system who possesses this power consumption device of constitution such as battery monomer, battery that this application is disclosed can be used, like this, is favorable to alleviating and automatically regulated electric core bulging force worsens, and supplementary electrolyte consumes, promotes the stability and the battery life of battery performance.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

As shown in fig. 1 to 6, according to some embodiments of the present application, there is provided a collecting tray 1 including:

the tray body 11 comprises a welding area 111 and a deformation area 112, the welding area 111 is used for being connected with a pole lug of a battery cell in a welding mode, and the deformation area 112 is made of a shape memory material; wherein, the deformation area is reduced after the deformation area 112 is heated to a predetermined temperature.

Specifically, as shown in fig. 7, the current collecting plate 1 is a member for covering the opening of the case 3 of the battery cell, connecting the tabs of the electric core assembly 4 in the case 3, and connecting the poles of the cap assembly 2 of the battery cell. The current collecting plate 1 needs to be made of conductive metal materials so as to be capable of serving as a good conductor between the tab and the electrode after being connected with the tab and the electrode. The current collecting plate 1 used in the embodiment of the present application may be applied to a cylindrical battery cell, and may also be applied to battery cells having other shapes, such as a rectangular parallelepiped shape.

The tray body 11 is a part of the current collecting tray 1 covering the opening of the housing 3 of the battery cell, so the tray body 11 can be provided in a shape, such as a circle, that is adapted to the shape of the opening of the housing 3 of the battery cell; meanwhile, the disc body 11 is also used for welding with the pole lugs of the electric core component 4. The welding area 111 of the disk 11 may be set to a suitable area and position according to the requirement of welding the tab, and the deformation area 112 is set at a position that does not affect the welding of the tab with the disk 11, that is, the deformation area 112 is set in the area of the disk 11 remaining after the welding area 111 is removed, and the deformation area 112 may occupy the whole area of the disk 11 after the welding area 111 is removed, or may be a partial area of the disk 11 remaining after the welding area 111 is removed. In addition, the current collecting disk 1 provided by the embodiment of the present application does not limit the shapes of the welding region 111 and the deformation region 112 of the disk body 11.

As shown in fig. 1, 2 and 5, the shape memory material used in the disk body 11 of the embodiment of the present application is a material that can contract or roll up when heated to a certain temperature, and the shape memory material is a metal material that can conduct electricity. When a battery cell is short-circuited to generate a large amount of heat and gas, the deformation area 112 of the shape memory material of the current collecting plate 1 is heated to shrink or roll up, so that a channel for gas to pass through is formed at the opening of the shell 3 of the battery cell.

In the technical scheme of this application embodiment, the partial region of the disk body 11 part of current collecting disk 1 sets up to deformation zone 112, and use shape memory material to make this deformation zone 112, when the battery monomer receives external force striking to take place the short circuit and produce a large amount of heats and gas, the heat is used in the deformation zone 112 that shape memory material made, deformation zone 112 of disk body 11 is heated and is out of shape, the area diminishes, form the passageway that supplies gas exhaust in the opening part of the free casing 3 of battery, and then will carry a large amount of thermal gases to discharge fast, avoid appearing burning, the condition of firing takes place.

As shown in fig. 1, 2, 5, according to some embodiments of the present application, the deformation zone 112 optionally includes two portions, one on each side of the weld zone 111.

Specifically, since the tray body 11 is covered on the opening of the housing 3 of the battery cell, and in order to facilitate the welding of the tab of the electric core assembly 4 in the battery cell to the tray body 11, it is preferable to weld the tab to the middle position of the tray body 11, the welding region 111 on the tray body 11 needs to include the middle position of the tray body 11, and thus the welding region 111 is selectively located at the middle position of the tray body 11 on the tray body 11, and the deformation regions 112 are disposed at both sides of the welding region 111.

In this embodiment, the deformation regions 112 are distributed on two sides of the welding region 111, so that the welding area of the welding region 111 can be ensured, and the welding region 111 occupies the middle of the tray body 11, thereby ensuring that the region where the tray body 11 and the tab are connected is located at a position where the tray body 11 is close to the center or the center, without changing the original connection position of the tray body 11 and the tab, and the original process of connecting the tray body 11 and the tab can be adopted to perform welding connection of the tray body 11 and the tab.

As shown in fig. 1, 2, and 5, according to some embodiments of the present application, a V-shaped missing area is optionally disposed on each side of the welding area 111, and two portions of the deformation area 112 are fan-shaped and respectively connected to the V-shaped missing area.

Specifically, the V-shaped missing region is an opening structure with V-shapes arranged on two sides of the welding region 111, that is, the local edge forms a V-shape, and both parts of the deformation region 112 need to have a connection shape matching with the missing region of the V-shape, so as to ensure that the overall shape formed after the deformation region 112 is connected with the welding region 111 is the same as the original shape of the current collecting plate 1, that is, the original shape of the current collecting plate 1 is not changed.

In the embodiment of the application, the V-shaped missing region can form two linear connecting edges, which is more convenient to connect than connecting edges of other shapes, and the deformation region 112 is arranged in a fan shape, so that the deformation region 112 has a larger area while having two linear connecting edges matched with the V-shaped missing region, thereby facilitating the alignment and connection of the welding region 111 and the deformation region 112; in addition, the tray body 11 of this structure may have a circular shape to be applied to a cylindrical battery.

As shown in fig. 1, 2, 5, according to some embodiments of the present application, optionally, two portions of the deformation zone 112 are symmetrically connected on both sides of the welding zone 111.

Specifically, since the welding region 111 needs to occupy a central position of the disc body 11 to ensure convenient welding with the tab, the deformation region 112 can be selected only at a position of one circumference of the disc body 11, so that the deformation regions 112 are selected to be symmetrically disposed at both sides of the welding region 111.

The symmetrically arranged deformation zones 112 facilitate the connection of the deformation zones 112 and the welding zone 111 by using a tool, and the interference of tool operation for connecting the deformation zones 112 and the welding zone 111 when the two deformation zones 112 are adjacent and close is avoided; in addition, the symmetrically arranged deformation regions 112 can also ensure that the welding region 111 is in an axially symmetrical shape as a whole, so that the welding region 111 is convenient to process.

As shown in fig. 1, 2, and 5, the current collecting plate 1 according to the embodiment of the present application further includes: a tail body 12 connected to the land 111; wherein the tail body 12 is adapted to be connected to a pole of the cap assembly 2.

Specifically, the current collecting plate 1 includes a plate body 11 and a tail body 12, the welding region 111 of the plate body 11 and the tail body 12 may be integrally formed or may be separately connected, and the tail body 12 is a part of the current collecting plate 1 for connecting a pole of the top cover assembly 2.

The tail body 12 is connected to the land 111 in the embodiment of the present application, which ensures the use of the current collecting plate 1 as a current conducting member.

As shown in fig. 1-6, according to some embodiments of the present application, optionally, the deformation zone 112 and the welding zone 111 are one of welded, riveted, or clamped connections. The welding mode can not only ensure the connection stability of the deformation area 112 and the welding area 111, but also ensure the tightness after the deformation area 112 and the welding area 111 are connected, thereby being beneficial to the transmission of current.

Specifically, the deformation region 112 and the welding region 111 are both plate structures, so that the above-mentioned welding, riveting or clamping connection is a connection manner which is simple in process and convenient to implement.

As shown in fig. 1, further, a part of the edge of the deformation region 112 is welded to the edge of the welding region 111, and the welding mode may be laser welding.

Or, as shown in fig. 2 to 4, a part of the edge of the deformation region 112 and a part of the edge of the land 111 are stacked and riveted by a rivet, for example, a through hole may be provided at the edge of the deformation region 112, and a through hole may also be provided at the edge of the land 111, and then riveted by a rivet, wherein, when the shape of the deformation region 112 is a sector, the through hole is provided at the tip of the V-shaped corner, and correspondingly, the through hole of the land 111 is provided at a position opposite to the V-shaped corner of the V-shaped missing region.

Or, as shown in fig. 5 and fig. 6, a portion of the edge of the deformation region 112 is provided with a groove 1121 to receive and clamp a portion of the edge of the welding region 111, and the clamping process may be performed by pressing the edge groove 1121 of the deformation region 112 onto the edge of the welding region 111 by means of an auxiliary machine, wherein, when the deformation region 112 is shaped like a sector, the grooves 1121 are provided on both sides of the V-shaped corner of the V-shaped missing region of the welding region 111, and the corresponding grooves 1121 are clamped on both sides of the V-shaped corner of the V-shaped missing region of the welding region 111.

According to some embodiments of the application, optionally, the shape memory material is a thermal bimetal or a shape memory alloy.

Specifically, when a thermal bimetal is selected as the material of the deformation region 112 in the embodiment of the present application, an iron-chromium-nickel alloy may be selected as the active layer, and an iron-nickel alloy may be selected as the passive layer, and the active layer and the passive layer are stacked and connected. Thus, when the deformation region 112 is heated, the active layer of the deformation region 112 made of the thermal bimetal material undergoes a larger thermal expansion, and the passive layer undergoes a smaller thermal expansion, so as to drive the passive layer to roll up under the action of the active layer, thereby reducing the area of the deformation region 112.

When a shape memory alloy is selected as the material of the deformation region 112 in the embodiment of the present application, the material of the deformation region 112 may be one of a nickel-titanium alloy, a copper-nickel alloy, a copper-aluminum alloy, a copper-zinc alloy, and an iron alloy (e.g., Fe — Mn — Si or Fe — Pd). Before the alloy is formed into the deformation region 112, the alloy is in a state of smaller size in a thermal state, and then is cooled and stretched to a size meeting the size requirement of the deformation region 112 through the action of external force, so that when the deformation region 112 made of the alloy material is heated, the deformation region 112 made of the alloy material shrinks, and further the area of the deformation region 112 becomes smaller.

In the embodiment of the present application, thermal bimetal or shape memory alloy is used as the material of the deformation region 112, so that the overall conductivity of the current collecting disc 1 can be ensured, and meanwhile, the deformation region 112 can deform under the action of high temperature, so that the area is reduced, the covering area for the opening of the housing 3 of the battery cell is reduced, an exhaust passage is formed, and then, a large amount of heat is rapidly exhausted by carrying gas in the battery cell.

As shown in fig. 7, according to some embodiments of the present application, the present application also provides a battery cell including the current collecting disk 1 according to any one of the above aspects. The battery cell can be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell can be in a cylinder, a flat body, a cuboid or other shapes.

According to some embodiments of the present application, there is also provided a battery including the battery cell of any of the above aspects.

According to some embodiments of the present application, there is also provided an electric device, including the battery of any of the above aspects, and the battery is used for providing electric energy for the electric device.

The powered device may be, but is not limited to, a cell phone, tablet, laptop, electronic toy, electric tool, battery car, electric car, ship, spacecraft, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

As shown in fig. 1 to 6, according to some embodiments of the present application, the current collecting disk 1 is configured in a shape suitable for use in a cylindrical battery, that is, the disk body 11 is configured in a circular disk shape, the welding region 111 is disposed in the middle, the missing regions of the V shape are disposed on both sides of the welding region 111, and both portions of the deformation region 112 are configured in a fan shape, and the deformation region 112 and the welding region 111 are connected together by welding, riveting, or clip-connecting; the tail body 12 is shaped as a rectangular plate body, and then the tail body 12 is attached to the edge of the land 111 of the tray body 11.

Wherein, the deformation region 112 is made of shape memory material, for example, the shape memory material is thermal bimetal, the active layer is fe-cr-ni alloy, and the passive layer is fe-ni alloy; or the shape memory material is nickel titanium base alloy.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (12)

1. A manifold disk, comprising:

the tray body comprises a welding area and a deformation area, the welding area is used for being connected with a lug of a battery monomer in a welding mode, and the deformation area is made of a shape memory material;

and the deformation area is reduced after the deformation area is heated to the preset temperature.

2. The manifold disk of claim 1,

the deformation zone comprises two portions, one on each side of the weld zone.

3. The manifold disk of claim 2,

and two sides of the welding area are respectively provided with a V-shaped missing area, and two parts of the deformation area are in fan shapes and are respectively connected with the V-shaped missing areas.

4. Manifold disc according to claim 2 or 3,

the two parts of the deformation area are symmetrically connected to two sides of the welding area.

5. The manifold disk of claim 1, further comprising:

a tail body connected with the welding area;

wherein, the afterbody is used for being connected with top cap assembly's utmost point post.

6. Manifold disc according to one of claims 1 to 3,

the deformation zone and the welding zone are one of welded, riveted or clamped.

7. The manifold disk of claim 6,

part of the edge of the deformation area is combined and welded with part of the edge of the welding area;

or part of the edge of the deformation area and part of the edge of the welding area are overlapped and riveted through a rivet;

or, a part of the edge of the deformation area is provided with a groove to accommodate and clamp the part of the edge of the welding area.

8. Manifold disc according to one of claims 1 to 3,

the shape memory material is a thermal bimetal or a shape memory alloy.

9. The manifold disk of claim 8,

the deformation region comprises an active layer and a passive layer which are stacked; the active layer is made of iron-chromium-nickel alloy, and the passive layer is made of iron-nickel alloy;

or the material of the deformation zone is one of nickel-titanium alloy, copper-nickel alloy, copper-aluminum alloy, copper-zinc alloy, Fe-Mn-Si and Fe-Pd.

10. A battery cell, comprising:

a collector disc according to any one of claims 1-9.

11. A battery, comprising:

at least one cell as recited in claim 10.

12. An electric device, comprising:

the battery of claim 11.

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