CN218448350U - Current collecting piece, battery pack and electric equipment - Google Patents

Abstract

The utility model discloses a mass flow piece, battery package and consumer. This mass flow piece includes: the tray comprises a tray body and a connecting sheet, wherein the connecting sheet is connected with the tray body and comprises at least one bendable area, and an insulating layer is arranged on the surface of at least one part of the bendable area. The current collecting piece is provided with the insulating layer on the surface of at least one part of the connecting sheet, so that the risk of short circuit caused when the current collecting piece is contacted with the battery shell can be effectively reduced, and the safety and the reliability of the battery are improved.

Description

Current collecting piece, battery pack and electric equipment

Technical Field

The utility model belongs to the battery field particularly, relates to mass flow piece, battery package and consumer.

Background

The reliability and the safety of the power battery are the technical difficulties and the key points in the manufacturing process of the power battery, the insulativity among all components in the battery is an important factor influencing the safety and the reliability of the battery, and if the insulativity among the components in the battery is poor, the battery is easy to generate short circuit in the using process, so that potential safety hazards exist. The end cover and the current collecting piece of the existing cylindrical battery are mostly connected through a connecting piece. When the current collector is connected with the end cover by the connecting sheet, the connecting sheet needs to be bent into an S shape when entering the shell, and under the condition of theoretically optimal bending, the part of the connecting sheet, which is bent and faces the inner surface of the shell, is not contacted with the inner wall of the shell. However, in the actual operation process, the connecting sheet is usually thin, and whether the bent structure is fixed or not cannot be guaranteed after bending; and, have certain spaced usually on the direction of height of cylinder battery between lower plastic and the mass flow piece, for example, the connection piece is bent after welding with battery apron (last utmost point post) earlier usually, for convenient operation, certain breach can normally be reserved to lower plastic in its circumference to can't guarantee connection piece and casing contactless completely, thereby there is the risk that contact (casing is electrified) takes place to cause the short circuit problem with the casing to the connection piece from this.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. To this end, an object of the present invention is to provide a current collector, a battery pack and an electrical device, so as to reduce the risk of short circuit of the battery and improve the safety and reliability of the battery and/or the electrical device.

In one aspect of the present invention, the present invention provides a mass flow member. According to the utility model discloses an embodiment, this mass flow piece includes: the tray body and connection piece, the connection piece with the tray body links to each other, the connection piece includes at least one bendable region, be equipped with the insulating layer on at least partly surface in the region of can bending. Compared with the prior art, the current collecting piece has the advantages that the insulating layer is arranged on the surface of at least one part of the connecting piece, so that the risk of short circuit caused when the current collecting piece is in contact with the battery shell can be effectively reduced, and the safety and the reliability of the battery are improved.

In addition, the current collector according to the above embodiment of the present invention may also have the following additional technical features:

optionally, the insulating layer is provided on all surfaces of the connecting sheet.

Optionally, at least a portion of the edge of at least one of the bendable regions is notched.

Optionally, the insulating layer is a ceramic coating, an insulating paint layer, a polymer coating, or an insulating sheet layer.

Optionally, the ceramic coating satisfies at least one of the following two conditions: the ceramic coating comprises inorganic particles and a binder; the thickness of the ceramic coating is 1-2 μm.

Optionally, the inorganic particles are zirconia, silica or alpha-alumina, and the binder is polyvinylidene fluoride, polyvinyl alcohol or carboxymethyl cellulose.

Optionally, the thickness of the layer of enamel is no greater than 2mm.

Optionally, the polymeric coating satisfies at least one of the following four conditions: the polymer coating is an elastomer coating; the polymer coating is a binder coating; the polymer coating is a polyvinylidene fluoride layer, a polyvinyl alcohol layer or a carboxymethyl cellulose layer; the polymer coating has a thickness of no more than 2mm.

Optionally, the insulator sheet layer satisfies at least one of the following four conditions: the insulating sheet layer is connected with the connecting sheet through a bonding agent layer; the insulating sheet layer is sleeved on the connecting sheet; the insulating sheet layer is an elastomer sheet layer; the thickness of the insulating sheet layer is not more than 2mm.

Optionally, the connecting sheet includes a first portion, a second portion, a first bendable region and a second bendable region, the first bendable region is connected between the tray body and the first portion, the second bendable region is connected between the first portion and the second portion, at least a portion of a surface of one side of the connecting sheet of the first bendable region is provided with the insulating layer, and at least a portion of a surface of the other side of the connecting sheet of the second bendable region is provided with the insulating layer.

Optionally, at least one of the first bendable region and the second bendable region is provided with a notch on at least a portion of the edge.

In another aspect of the present invention, the utility model provides a battery. According to the utility model discloses an embodiment, this battery includes: the battery comprises a shell, an end cover, a naked battery cell and the current collecting piece, wherein the shell is provided with an opening; the end cover seals the opening, and comprises a pole; the naked battery cell is accommodated in the shell; the current collecting piece is arranged on one side, close to the naked electric core, of the end cover, the connecting piece is connected with the pole, the disc body is connected with the naked electric core, the current collecting piece is bent in the at least one bendable area, and the insulating layer is arranged on the surface of one side, close to the shell, of the at least one bendable area. The battery has all the features and effects described for the current collector described above, and will not be described herein. Overall, the cell has a relatively low risk of short circuits and better safety and reliability.

In yet another aspect of the present invention, the present invention provides a battery. According to the utility model discloses an embodiment, this battery includes: the battery comprises a shell, an end cover, a naked battery core and the current collecting piece, wherein the shell is provided with an opening; the end cover seals the opening, and comprises a pole; the naked battery cell is accommodated in the shell; the current collecting piece is arranged on one side, close to the naked electric core, of the end cover, the second portion of the connecting piece is connected with the pole, the disc body is connected with the naked electric core, the current collecting piece is arranged on the first bendable region and the second bendable region and bent into an S shape, and the insulating layer is arranged on the surface of one side, close to the shell, of the first bendable region and the second bendable region. The battery has all the features and effects described for the current collector described above, and will not be described herein. Overall, the cell has a relatively low risk of short circuits and better safety and reliability.

Optionally, the distance between the surface of the second portion of the S-shaped current collector, which is far away from the disc body, and the surface of the disc body, which is far away from the connecting piece, is H, the width of the insulating layer of each bendable region is not less than pi H/4, and the width direction of the insulating layer is consistent with the length direction of the connecting piece.

In yet another aspect of the present invention, the present invention provides a battery pack. According to an embodiment of the present invention, the battery pack includes the battery or the current collecting member. The battery pack has all the features and effects described for the aforementioned battery and current collector, and will not be described in detail herein. Overall, the safety and reliability of the battery pack are better.

In yet another aspect of the present invention, the present invention provides a power consumer, the power consumer includes the battery pack or the battery. The electric device has all the features and effects described for the battery pack and the battery, and the details are not repeated herein. Generally, the safety and reliability of the electric equipment are better.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a manifold according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a manifold according to yet another embodiment of the present invention.

Fig. 3 is a block diagram of a current collector connected to a battery cover plate by bending, according to an embodiment of the present invention.

Fig. 4 is a schematic view showing the distribution of the insulating layer on the collector tab of fig. 3.

Description of the drawings:

10-a tray body; 20-connecting pieces; 21-a first part; 22-a second portion; 30-an insulating layer; 40-a bendable region; 41-notch; 42-a first bendable region; 43-a second bendable region; 50-an end cap; a 51-pole; 60-a housing; 70-discharging plastic cement; the distance between the surface of the second part of the H-S-shaped current collecting piece far away from the disc body and the surface of the disc body far away from the connecting piece.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "inner", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media.

In one aspect of the present invention, the present invention provides a mass flow member. According to an embodiment of the present invention, as understood with reference to fig. 1, the current collector comprises: the tray body 10 and the connecting sheet 20, the connecting sheet 20 is connected with the tray body 10 (for example, may be integrally formed), the connecting sheet 20 includes at least one bendable region 40, and at least one portion of the surface of the bendable region 40 is provided with an insulating layer 30. Compared with the prior art, the current collecting piece is provided with the insulating layer on at least one part of the surface of the connecting piece, so that the risk of short circuit caused by opposite electrical properties when the current collecting piece is contacted with the battery shell can be effectively reduced, and the safety and the reliability of the battery are improved.

The collecting member according to the above embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

According to the utility model discloses an embodiment, understand in combination with fig. 3 ~ 4, when being used for the mass flow piece in the battery, the mass flow piece can be established in one side that battery end cover 50 is close to electric core, make connection piece 20 be connected with utmost point post 51, disk body 10 is connected with electric core, the mass flow piece is buckled in at least one bendable district 40 simultaneously, insulating layer 30 is established on the surface of the nearer one side of at least one bendable district 40 apart from battery case 60, can reduce the risk that causes the short circuit problem because of the electric property is opposite when connection piece and the contact of battery case more effectively from this, improve the security and the reliability of battery. Further, according to the specific example of the present invention, the setting region of the insulating layer 30 may include, but is not limited to, the surface of the side of the at least one bendable region 40 on the connecting sheet 20, which is closer to the battery case, or may only set the insulating layer on the surface of the side of the at least one bendable region 40 on the connecting sheet 20, which is closer to the battery case, so as to reduce the cost of the insulating layer while reducing the risk of short circuit. For example again, according to the utility model discloses a concrete example, at least one can buckle district 40 and also can be equipped with insulating layer 30 on the surface at connection piece 20 thickness direction place, the connection piece is along the district back of buckling of can buckling, and the probability that can buckle the district and lie in connection piece width direction's both ends and battery case contact is bigger, also takes place the scratch more easily, through also set up the insulating layer on the surface at connection piece thickness direction place is followed in the district that can buckle, the short circuit risk that probably causes when can further reduce connection piece and battery case contact.

According to the utility model discloses an embodiment can make all on the surface of connection piece 20 all be equipped with insulating layer 30, can further avoid the risk of taking place the short circuit when connection piece and battery case contact from this.

According to an embodiment of the present invention, it can be understood with reference to fig. 2 that the connecting sheet 20 may be provided with a notch 41 on at least a portion of the edge of the at least one bendable region 40, thereby further facilitating the realization of the bendability of the bendable region of the connecting sheet.

According to the embodiment of the present invention, as can be understood by referring to fig. 2, the middle portion of the tray body 10 may be further provided with a vent, thereby further facilitating the discharge of the gas inside the battery.

According to the embodiment of the present invention, the type of the middle insulation layer 30 of the present invention is not particularly limited, and those skilled in the art can flexibly select the type according to actual needs as long as the contact short circuit between the connection sheet 20 and the battery case can be avoided when the current collecting member is used in the battery. For example, the insulating layer 30 may be a ceramic coating, an insulating paint layer, a polymer coating, or an insulating sheet layer, among others.

According to the utility model discloses a specific embodiment, ceramic coating can include inorganic particle and binder, and wherein the kind of inorganic particle and binder and the mass ratio of inorganic particle and binder do not all receive special restrictions, and the skilled person in the art can select according to actual need in a flexible way, as long as the ceramic coating that forms has better insulating effect can. For example, the inorganic particles may be selected from metal oxides and/or non-metal oxides, such as zirconia, silica, α -alumina, etc., wherein α -alumina has better chemical stability than other crystal forms, and has better corrosion resistance while having better insulating effect; in addition, when hydrofluoric acid is contained in the electrolyte, in order to prevent silicon oxide from reacting with the electrolyte to affect the insulating effect, zirconium oxide or α -alumina may be preferably used as the inorganic particles, or a corrosion-resistant coating layer may be formed on the surface of silicon oxide. The binder may be polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose, or the like.

According to the utility model discloses a concrete embodiment, ceramic coating's thickness can be for 1~2 μm, for example can be for 1.2 μm, 1.4 μm, 1.6 μm or 1.8 μm etc, when adopting ceramic coating, if the thickness of coating is too thin, be difficult to ensure to reach better insulating effect, and if ceramic coating's thickness is too thick, the problem that the coating peeled off can appear again in the district of can buckling in the connection piece area of can buckling, and increase material cost, the utility model discloses in be above-mentioned scope through control ceramic coating's thickness, can better compromise insulating effect and material cost. In addition, in order to ensure the flatness of the ceramic coating, inorganic particles having a nano-scale particle size may also be preferably used.

According to the embodiment of the present invention, the composition of the insulating paint layer is not particularly limited, and those skilled in the art can flexibly select the insulating paint layer according to the actual requirement as long as it can achieve better insulating effect, for example, the insulating paint layer may include a film forming substance, a solvent, an auxiliary agent, etc., and further, the thickness of the insulating paint layer may be not more than 2mm, for example, 1 μm, 5 μm, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 500 μm, or 1mm, etc., thereby better considering the insulating effect and the raw material cost.

According to the utility model discloses a specific embodiment, the polymer coating can be the elastomer coating, when the connection piece takes place frictional contact or scrapes with battery case, can influence the surface integrality of insulating layer, causes the connection piece to expose, and then influences insulating effect, can further cushion the interact power between connection piece and battery case through adopting the elastomer coating, plays certain guard action to the insulating layer to can further improve the reliability and the protecting effect of insulating layer.

According to the utility model discloses a specific embodiment, the polymer coating can also be the pure binder layer, for example can be polyvinylidene fluoride layer, polyvinyl alcohol layer or carboxymethyl cellulose layer etc. preferably can be the elastomer binder layer, when adopting the binder layer, can be when reaching better insulating effect, realize the relatively fixed of connection piece and casing, when the two contacts promptly, further reduce the two looks mutual friction through making connection piece and casing bonding fixation, the frequency of scraping, avoid frequently rubbing and scraping to the connection piece structure, the adverse effect of production such as the insulating effect of insulating layer. Further, the thickness of the polymer coating layer may be not more than 2mm, for example, 1 μm, 5 μm, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 500 μm, 1mm, or the like, whereby the insulating effect and the raw material cost can be well balanced.

According to the embodiment of the present invention, the type of the insulation sheet layer is not particularly limited, and those skilled in the art can flexibly select the insulation sheet layer according to actual needs, for example, the insulation sheet layer may be a polymer film sheet (such as PE film or PP film, etc.) or a polymer insulation ring layer (such as a silicone ring or a rubber ring, etc.) sleeved on the connection sheet 20. According to the specific example of the utility model, can select its fixed mode with the connection piece according to the specific type of insulating lamella, for example, insulating lamella (like polymer film piece) both can link to each other with the connection piece through the binder layer and realize the relative fastening of insulating lamella and connection piece, also can overlap and establish the relative fastening that realizes insulating lamella and connection piece on the connection piece (like polymer film piece). Further, the thickness of the insulating sheet layer may be not more than 2mm, for example, 1 μm, 5 μm, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 500 μm, or 1mm, and thus the insulating effect and the raw material cost can be preferably compatible.

According to an embodiment of the present invention, it is understood with reference to fig. 2 that the connection piece 20 may include a first portion 21, a second portion 22, a first bendable region 42 and a second bendable region 43, the first bendable region 42 is connected between the tray body 10 and the first portion 21, the second bendable region 43 is connected between the first portion 21 and the second portion 22, at least a portion of a surface of the first bendable region 42 located at one side of the connection piece 20 is provided with the insulation layer 30, and at least a portion of a surface of the second bendable region 43 located at the other side of the connection piece 20 is provided with the insulation layer 30. At this time, as will be understood from fig. 3 to 4, when the current collecting element is used in a battery, the current collecting element is disposed on a side of the battery end cover 50 close to the battery cell, the second portion 22 of the connecting sheet 20 is connected to the terminal post 51 of the battery end plate 50, the tray body 10 is connected to the battery cell, the current collecting element is bent into an S shape in the first bendable region 42 and the second bendable region 43, and the insulating layer 30 is disposed on a surface of the first bendable region 42 and the second bendable region 43 on a side close to the case 60. Therefore, the risk of short circuit caused by opposite electrical properties when the connecting sheet is contacted with the battery shell can be effectively reduced, and the safety and the reliability of the battery are improved.

According to the embodiment of the present invention, it can be understood with reference to fig. 2 that the connection piece 20 may include a first portion 21, a second portion 22, a first bendable region 42 and a second bendable region 43, the first bendable region 42 is connected between the tray body 10 and the first portion 21, the second bendable region 43 is connected between the first portion 21 and the second portion 22, at least a portion of the surface of the connection piece 20 located on the side closer to the battery case 60 may be provided with the insulation layer 30, and the second bendable region 43 is not provided with the insulation layer 30. 3-4, based on the design requirement of increasing the welding area of the disc body and the tab of the current collector in the actual operation process, the distance between the first bendable region 42 and the battery case 60 is usually larger than the distance between the second bendable region 43 and the battery case 60, and too small a distance between the connecting sheet and the battery case increases the risk of contact short circuit between the connecting sheet and the battery case; and, lower plastic 70 is from battery end cover 50 to the direction of rolling up the core extension, and the second bendable region that is close to battery end cover one side can avoid its contact with the battery case with the help of lower plastic better, from this, through only setting up the insulating layer on the surface of the at least part of first bendable region on the connecting piece, can further reduce the setting area and the cost of insulating layer when effectively reducing the short circuit risk.

According to an embodiment of the present invention, as shown in fig. 2, at least one of the first bendable region 42 and the second bendable region 43 may have a notch 41 on at least a portion of the edge. Thereby being more beneficial to realizing the bendability of the bendable area of the connecting sheet.

According to the utility model discloses a concrete embodiment, can understand, the utility model discloses the mass flow piece in the above-mentioned embodiment both can be anodal mass flow piece, also can be negative pole mass flow piece, and the skilled in the art personnel can select according to actual need is nimble.

In another aspect of the present invention, the present invention provides a battery. According to the utility model discloses an embodiment, understand in connection with fig. 3, this battery includes: a housing 60, end caps 50, bare cell (not shown) and current collectors as previously described, the battery housing 60 having an opening; the cell end cap 50 closes the opening, the end cap including the post 51; the bare cell is housed in the casing 60; the current collecting piece is arranged on one side, close to a naked electric core, of the end cover 50, the connecting piece 20 is connected with the pole 51, the disc body 10 is connected with the naked electric core, the current collecting piece is bent in at least one bendable area 40, and the insulating layer 30 is arranged on the surface of one side, close to the shell 60, of the at least one bendable area 40. It should be noted that all the features and effects described for the current collecting member described above are also applicable to the battery, and are not described herein again. Overall, the cell has a relatively low risk of short circuits and better safety and reliability. In addition, it is also noted that the type of the battery is not particularly limited, and may be, for example, a cylindrical battery or the like.

In yet another aspect of the present invention, a battery is provided. According to the embodiment of the present invention, as understood in conjunction with fig. 3 to 4, the battery includes: a housing 60, end caps 50, bare cell (not shown) and current collectors as previously described, the battery housing 60 having an opening; the battery end cap 50 closes the opening, the end cap 50 including a post 51; the bare cell is housed in the casing 60; the one side near naked electric core that end cover 50 was located to the mass flow piece, and the second portion 22 of connection piece 20 is connected with utmost point post 51, and disk body 10 is connected with naked electric core, and the mass flow piece is buckled into the S-shaped in first bendable area 42 and second bendable area 43, and insulating layer 30 establishes the surface in the nearer one side of first bendable area 42 and second bendable area 43 apart from casing 60. It should be noted that all the features and effects described for the current collecting member described above are also applicable to the battery, and are not described herein again. Overall, the cell has a relatively low risk of short circuits and better safety and reliability. In addition, it is also noted that the type of the battery is not particularly limited, and may be, for example, a cylindrical battery or the like.

According to the embodiment of the present invention, it can be understood with reference to fig. 4 that the distance between the surface of the second portion 22 of the S-shaped current collecting member away from the disk body 10 and the surface of the disk body 10 away from the connecting sheet 20 is H, the width of the insulating layer 30 of each bendable region is not less than pi H/4, and the width direction of the insulating layer 30 is consistent with the length direction of the connecting sheet 20. The width of the insulating layer on the bendable region is controlled to be within the range, so that the risk of contact short circuit between the connecting sheet and the inner surface of the battery shell can be further reduced.

In another aspect of the present invention, the present invention provides a battery pack. According to an embodiment of the present invention, the battery pack includes the battery or the current collecting member. It should be noted that the features and effects described for the aforementioned battery and current collecting member are also applicable to the battery pack, and are not described in detail herein. Overall, the safety and reliability of the battery pack are better. It can be understood that the battery pack may include one or more battery modules, each of which may further include a plurality of batteries, and at least one of the batteries may be the aforementioned battery or include the aforementioned current collector.

In another aspect of the present invention, the present invention provides a power device, which comprises the battery pack or the battery mentioned above. It should be noted that the features and effects described for the battery pack and the battery are also applicable to the electric device, and are not described herein again. Overall, the safety and reliability of the consumer are better. In addition, it should be noted that the specific type of the electric device is not particularly limited, and those skilled in the art can flexibly select the electric device according to actual needs, for example, the electric device may be a vehicle, an electronic device, or a domestic electric appliance.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (11)

1. A manifold, comprising:

a tray body;

the connecting piece, the connecting piece with the disk body links to each other, the connecting piece includes at least one bendable region, at least partly be equipped with the insulating layer on the surface in region of can bending.

2. The current collector of claim 1, wherein the connecting tab is provided with the insulating layer on all surfaces; and/or at least one part of the edge of at least one bendable area is provided with a notch.

3. The current collector of claim 1, wherein the insulating layer is a ceramic coating, an insulating paint layer, a polymer coating, or an insulating sheet layer.

4. Flow collector according to claim 3,

the thickness of the ceramic coating is 1 to 2 mu m;

the thickness of the insulating paint layer is not more than 2mm;

the polymer coating satisfies at least one of the following four conditions:

the polymer coating is an elastomer coating;

the polymer coating is a binder coating;

the polymer coating is a polyvinylidene fluoride layer, a polyvinyl alcohol layer or a carboxymethyl cellulose layer;

the thickness of the polymer coating is not more than 2mm;

the insulating sheet layer satisfies at least one of the following four conditions:

the insulating sheet layer is connected with the connecting sheet through a bonding agent layer;

the insulating sheet layer is sleeved on the connecting sheet;

the insulating sheet layer is an elastomer sheet layer;

the thickness of the insulating sheet layer is not more than 2mm.

5. The current collector of any of claims 1-4, wherein the tab includes a first portion, a second portion, a first bendable region connected between the tray body and the first portion, and a second bendable region connected between the first portion and the second portion, at least a portion of a surface of the first bendable region on one side of the tab being provided with the insulating layer, at least a portion of a surface of the second bendable region on the other side of the tab being provided with the insulating layer.

6. The current collector of claim 5, wherein at least a portion of an edge of at least one of the first bendable region and the second bendable region is notched.

7. A battery, comprising:

a housing having an opening;

an end cap closing the opening, the end cap including a post;

the naked electric core is contained in the shell;

the current collecting piece of any one of claims 1 to 6, wherein the current collecting piece is arranged on one side, close to the bare cell, of the end cover, the connecting piece is connected with the pole, the disc body is connected with the bare cell,

the current collecting piece is bent in the at least one bendable area, and the insulating layer is arranged on the surface of the side, close to the shell, of the at least one bendable area.

8. A battery, comprising:

a housing having an opening;

an end cap that closes the opening, the end cap including a post;

the naked electric core is contained in the shell;

the current collecting member of claim 5 or 6, wherein the current collecting member is disposed at a side of the end cap close to the bare cell, the second portion of the connecting sheet is connected to the pole, the tray body is connected to the bare cell,

the current collecting piece is bent into an S shape in the first bendable region and the second bendable region, and the insulating layer is arranged on the surface of one side, close to the shell, of the first bendable region and the second bendable region.

9. The battery of claim 8, wherein a distance between a surface of the second portion of the S-shaped current collector away from the tray body and a surface of the tray body away from the tab is H, a width of the insulating layer of each bendable region is not less than pi H/4, and a width direction of the insulating layer coincides with a length direction of the tab.

10. A battery pack comprising the battery according to any one of claims 7 to 9 or the current collector according to any one of claims 1 to 6.

11. An electric device comprising the battery pack according to claim 10 or the battery according to claims 7 to 9.

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