CN114497913A - Utmost point ear and battery - Google Patents
Utmost point ear and battery Download PDFInfo
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- CN114497913A CN114497913A CN202210104760.1A CN202210104760A CN114497913A CN 114497913 A CN114497913 A CN 114497913A CN 202210104760 A CN202210104760 A CN 202210104760A CN 114497913 A CN114497913 A CN 114497913A
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- tab
- heat dissipation
- battery
- dissipation channel
- state
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application provides a tab and a battery, wherein the tab comprises a tab body and a filling piece; a heat dissipation channel is arranged in the tab body, and the filling piece is positioned in the heat dissipation channel; when the filling piece is in the first state, the heat dissipation channel is in a closed state, and when the filling piece is in the second state, the heat dissipation channel is in an open state; in case of a phase change and/or a volume change of the filling member, the filling member changes from the first state to the second state. Therefore, on the premise of not influencing the conductive function of the lug, the heat dissipation channel arranged in the lug body is additionally arranged, and the inside and the outside of the battery are connected through the heat dissipation channel by virtue of the phase change and/or the volume change of the filling piece in the heat dissipation channel, so that the effects of rapid heat dissipation, pressure relief and directional breakthrough are achieved, and the safety performance of the battery is improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a tab and a battery.
Background
Lithium ion batteries are widely used in various fields such as automobiles, mobile phones, motorcycles, unmanned planes and energy storage at present, and the safety problem of the lithium ion batteries is most concerned. Thermal runaway is the most common safety problem of lithium ion batteries, and the thermal runaway of the lithium ion batteries can be caused under the conditions that the batteries are subjected to external impact such as impact and extrusion, or the charging is overcharged, the charging current is overlarge and the like, so that the batteries are ignited and even exploded.
At present, the lithium ion battery has strong sealing performance, can not dissipate heat in time under the condition of generating a large amount of heat and gas in the battery, is easy to generate fire, and has low safety performance.
Disclosure of Invention
The embodiment of the application provides a tab and a battery, which are used for solving the problems that the existing lithium ion battery cannot dissipate heat in time under the conditions of temperature rise and serious gas generation, so that the ignition is easy to happen, and the safety performance is low.
In a first aspect, an embodiment of the application provides a tab, which comprises a tab body and a filling piece;
a heat dissipation channel is arranged in the tab body, and the filling piece is positioned in the heat dissipation channel;
the heat dissipation channel is in a closed state under the condition that the filling piece is in the first state, and the heat dissipation channel is in an open state under the condition that the filling piece is in the second state;
in case of a phase change and/or a volume change of the filling member, the filling member changes from the first state to the second state.
Optionally, the tab is used to electrically connect the battery core of the battery and the external circuit, and when the battery core temperature is greater than a preset temperature value and/or the pressure in the battery is greater than a preset pressure value, the filling member is used to open the communication between the battery core and the external circuit.
Optionally, the tab body comprises a metal strip, and a first insulating glue layer and a second insulating glue layer which are arranged on the metal strip;
the second insulating adhesive layer and the first insulating adhesive layer are oppositely arranged, and the metal tape is positioned between the first insulating adhesive layer and the second insulating adhesive layer; the metal belt is provided with a groove, an opening of the groove faces the first insulating adhesive layer, the filling piece is located in the groove, and the groove forms a heat dissipation channel.
Optionally, the groove at least partially penetrates through the metal strip in a thickness direction of the metal strip.
Optionally, the width of the groove is less than half of the width of the metal strip.
Optionally, the cross-sectional shape of the groove includes a square shape, a trapezoid shape, a triangle shape, an arc shape, and a column shape.
Optionally, the filler comprises at least one of a temperature sensitive material and/or a pressure sensitive material.
Optionally, the temperature sensitive material is at least one of polypropylene, polyethylene, propylene, ethylene copolymer, propylene, ethylene derived copolymer, and/or,
the pressure sensitive material is at least one of alumina, ceramic, polyvinyl chloride (PVC), Polyformaldehyde (POM), vinyl acetate copolymer and the like.
Optionally, when the filling member is in the first state, the top surface of the filling member is flush with the top surface of the metal strip.
Optionally, the first insulating glue layer or the second insulating glue layer covers at least one side of the groove along the length direction of the metal strip.
In a second aspect, an embodiment of the present application further provides a battery, including: the battery cell, the packaging part and the electrode lug;
the battery cell is arranged in the packaging part, the lug is connected with the battery cell and penetrates through the packaging part of the packaging part.
Optionally, the projection of the first side edge in the thickness direction of the tab is located on the inner side of the projection of the second side edge in the thickness direction of the tab, wherein the first side edge is away from the encapsulation portion and the second side edge is away from the heat dissipation channel and the side edge of the battery cell.
In the technical scheme provided by the embodiment of the application, the tab comprises a tab body and a filling piece, a heat dissipation channel is arranged in the tab body, the filling piece is located in the heat dissipation channel, the heat dissipation channel is in a closed state under the condition that the filling piece is in a first state, the heat dissipation channel is in an open state under the condition that the filling piece is in a second state, and the filling piece is changed from the first state to the second state under the condition that the filling piece is in a phase change and/or a volume change. Therefore, on the premise of not influencing the conductive function of the lug, the heat dissipation channel arranged in the lug body is additionally arranged, and the inside and the outside of the battery are connected through the heat dissipation channel by virtue of the phase change and/or the volume change of the filling piece in the heat dissipation channel, so that the effects of rapid heat dissipation, pressure relief and directional breakthrough are achieved, and the safety performance of the battery is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a tab provided in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is one of the schematic cross-sectional views B-B of FIG. 1;
FIG. 4 is a second schematic cross-sectional view B-B of FIG. 1;
FIG. 5 is one of the schematic cross-sectional views C-C of FIG. 1;
FIG. 6 is a second schematic cross-sectional view of C-C of FIG. 1;
FIG. 7 is a third schematic cross-sectional view C-C of FIG. 1;
FIG. 8 is a fourth schematic cross-sectional view C-C of FIG. 1;
FIG. 9 is a fifth cross-sectional view of C-C of FIG. 1;
FIG. 10 is a sixth schematic cross-sectional view C-C of FIG. 1;
FIG. 11 is a seventh cross-sectional view C-C of FIG. 1;
FIG. 12 is an eighth schematic cross-sectional view C-C of FIG. 1;
fig. 13 is a schematic structural diagram of a battery provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Referring to fig. 1-4, schematic structural views of a tab provided in an embodiment of the present application are shown, where the tab includes a tab body 10 and a filler;
a heat dissipation channel is arranged in the tab body 10, and the filling piece is positioned in the heat dissipation channel;
the heat dissipation channel is in a closed state under the condition that the filling piece is in the first state, and the heat dissipation channel is in an open state under the condition that the filling piece is in the second state;
in case of a phase change and/or a volume change of the filling member, the filling member changes from the first state to the second state.
The lug is used for electrically connecting the battery core of the battery with an external circuit, specifically, under the condition that the battery is out of control due to heat, a large amount of heat and gas can be generated inside the battery, so that the internal temperature of the battery is increased, the pressure of the battery is increased, and the filling piece can control the opening of the heat dissipation channel through the change of the phase state or the volume of the filling piece when the condition that the temperature inside the battery where the battery core is located is higher than a preset temperature value and/or the internal pressure value is higher than a preset pressure value is detected.
Wherein the filler member comprises at least one of a temperature sensitive material and/or a pressure sensitive material. Specifically, the temperature sensitive material may be at least one of polypropylene, polyethylene, propylene, ethylene copolymer, propylene and ethylene derived copolymer, and/or the pressure sensitive material may be at least one of alumina, ceramic, polyvinyl chloride (PVC), Polyoxymethylene (POM), vinyl acetate copolymer, and the like.
In the embodiment of the application, on the premise of not affecting the conductive function of the tab, the heat dissipation channel arranged in the tab body 10 is additionally arranged, and the filling piece in the heat dissipation channel generates phase change and/or volume change, so that the inside and the outside of the battery are connected through the heat dissipation channel, the effects of rapid heat dissipation, pressure relief and directional breakthrough are achieved, and the safety performance of the battery is improved.
In specific implementation, the filling member in the heat dissipation channel generates phase state and/or volume change due to temperature rise and pressure increase inside the battery. Wherein the state of the filling member before the change is a first state, and the state of the filling member after the change is a second state.
In a feasible implementation manner, when the filling member is in the first state, wherein the first state is a solid state, the filling member fills the heat dissipation channel, at this time, the heat dissipation channel is in a closed state, the inside of the battery where the electric core is located is completely isolated from the external environment of the battery, and as the temperature inside the battery where the electric core is located continuously rises, the filling member absorbs heat and changes into the second state, wherein the second state is a gas state, at this time, the heat dissipation channel communicates the inside of the battery where the electric core is located with the outside of the battery, the heat dissipation channel is in an open state, and part of high temperature and gas in the battery where the electric core is located can be released to the external environment of the battery through the heat dissipation channel, so that rapid temperature reduction and pressure release are achieved, and the safety performance of the battery is improved.
In another feasible implementation manner, when the filling member is in a first state, wherein the first state is a larger-volume state, the filling member fills the heat dissipation channel, at this time, the heat dissipation channel is in a closed state, and the interior of the battery where the battery core is located is completely isolated from the external environment of the battery; along with the continuous grow of the pressure of electricity core place battery inside, the volume of filler diminishes, and the filler is in the second state promptly, and at this moment, the filler does not fill up the heat dissipation passageway, and heat dissipation passageway part intercommunication, heat dissipation passageway are in the open mode, and the inside high temperature of electricity core place battery or high-pressure gas accessible this heat dissipation passageway release to battery external environment reach rapid cooling, decompression to promote the security performance of battery.
Optionally, the tab is used to electrically connect the battery core of the battery and an external circuit, and when the battery core temperature is greater than a preset temperature value and/or the pressure in the battery is greater than a preset pressure value, the filling member changes from the first state to the second state to open the heat dissipation channel.
Specifically, in a feasible implementation manner, when the internal temperature of the battery reaches a preset temperature, the filling member disposed in the heat dissipation channel starts to melt, and as the temperature continuously rises, until the heat dissipation channel is opened, the battery core is communicated with the external environment of the battery, so that the heat and gas inside the battery are released in time.
In another feasible implementation manner, when the pressure in the battery reaches the preset pressure value, the filling member arranged in the heat dissipation channel is broken, the heat dissipation channel is opened, the interior of the battery and the external environment of the battery can be communicated through the breaking opening on the filling member, and along with the continuous increase of the pressure, the filling member is completely broken, the heat dissipation channel is completely opened, and the heat and the gas in the battery can be rapidly released to the external environment of the battery through the heat dissipation channel, so that the safety performance of the battery is improved.
Optionally, the tab body 10 comprises a metal strip 11 and a first insulating glue layer 12 and a second insulating glue layer 13 arranged on the metal strip 11;
the second insulating glue layer 13 and the first insulating glue layer 12 are oppositely arranged, and the metal tape 11 is positioned between the first insulating glue layer 12 and the second insulating glue layer 13;
the metal strap 11 is provided with a groove 111, an opening of the groove 111 faces the first insulating adhesive layer 12, the filling member is located in the groove 111, and the groove 111 forms a heat dissipation channel.
The metal strip 11 may be an aluminum metal strip 11 for connecting a positive electrode, a nickel-plated copper metal strip 11 for connecting a negative electrode, or a nickel strip, which is not limited in this embodiment. The insulating glue layer is an insulating part on the lug, and has the function of preventing short circuit between the metal belt 11 and the aluminum plastic film when the battery is packaged, and in addition, the insulating glue layer and the aluminum plastic film are sealed and bonded together through hot melting by heating (140-200 ℃) when the battery is packaged, so that the sealing effect inside the battery is achieved, and liquid leakage is prevented. Wherein the top surface of the filler piece is flush with the top surface of the metal strip 11 with the filler piece in the first state.
In addition, the insulating glue layer may be a single-layer structure with a melting point between 100 ℃ and 170 ℃, or may be a multi-layer structure with a low melting point layer between 100 ℃ and 150 ℃ and a high melting point layer between 150 ℃ and 170 ℃, which is not limited in this embodiment. In specific implementation, the insulating adhesive layers include a first insulating adhesive layer 12 and a second insulating adhesive layer 13, the metal strap 11 is sandwiched between the two insulating adhesive layers, and the two insulating adhesive layers both partially cover the heat dissipation channel on the metal strap 11.
As shown in fig. 5 to 12, the cross-sectional shape of the groove 111 may be any one of a square shape, a trapezoid shape, a triangle shape, an arc shape, and a column shape.
In a specific implementation, the groove 111 may be formed by at least one of laser burning, cutting, and stamping, and the cross-sectional shape of the formed heat dissipation channel may be a square, a trapezoid, a triangle, and the like, which is not limited in this embodiment. The filling member disposed in the groove 111 can be filled in the groove 111 by any one of coating, extruding, welding, heat pasting, pressing, and the like, and the filled filling member should be consistent with the surface of the metal strip 11 in height. Wherein the thickness of the metal belt 11 is between 0.05mm and 2.0 mm.
Alternatively, the groove 111 may penetrate the metal strip 11 at least partially in the thickness direction of the metal strip 11.
In practical applications, the groove 111 may completely penetrate through the metal strip 11, and the height of the cross section of the groove 111 is the same as the height of the metal strip 11; the groove 111 may not completely penetrate through the metal strip 11, and the sectional height of the groove 111 is smaller than the height of the metal strip 11, which is not limited in this embodiment.
Optionally, the width of the groove 111 is less than half of the width of the metal strip 11, so that heat and gas inside the battery with the battery cell can be released through the heat dissipation channel while the conductive performance of the tab itself is not affected. Wherein the width of the metal belt 11 is between 2.0mm and 100 mm.
In addition, the minimum cross section width of the heat dissipation channel should be not less than the first preset width, so that the heat dissipation channel in the open state has certain heat dissipation capability and manufacturability. Wherein, the first preset width may be 0.05 mm.
Optionally, the first insulating glue layer 12 or the second insulating glue layer 13 covers at least one side of the groove 111 along the length direction of the metal strip 11.
Referring to fig. 13, fig. 13 is a schematic structural diagram of a battery according to an embodiment of the present disclosure, where the battery includes: the battery cell 20, the packaging part 30 and the tab;
the battery cell 20 is disposed in the package member 30, the tab is connected to the battery cell 20, and the tab is inserted into the package portion of the package member 30.
The first channel port of the heat dissipation channel is located at one side of the packaging part and is communicated with the battery core 20 inside the battery, the second channel port is located at the other side of the packaging part and is communicated with the external environment of the battery, the filling member is located in the heat dissipation channel, and the filling member adjusts the opening or closing of the heat dissipation channel. In addition, the filling member disposed in the heat dissipation channel should have good chemical stability and electrochemical stability, will not react with the electrolyte, will not be oxidized or reduced during charging and discharging, and will not be corroded easily.
In this embodiment, the battery includes at least one tab with a heat dissipation channel, and the tab may be a positive tab or a negative tab on the battery 200, which is not limited in this embodiment.
Optionally, the projection of the first side edge in the thickness direction of the tab is located on the inner side of the projection of the second side edge in the thickness direction of the tab, where the first side edge is the side edge of the battery cell 20 away from the encapsulation portion, and the second side edge is the side edge of the battery cell 20 away from the heat dissipation channel, so as to avoid the risk of battery short circuit.
For better understanding of the embodiments of the present application, the following describes the manufacturing process of the battery in the present application:
at present, the lithium ion battery comprises an anode tab, a cathode tab, an aluminum plastic film, and a battery core 20 assembled by an anode plate, a cathode plate and a diaphragm, wherein the anode tab and the cathode tab are respectively connected with the anode plate and the cathode plate of the battery core 20 through welding, the aluminum plastic film, the anode tab and the cathode tab are combined together through heat sealing of an insulating glue, namely top sealing is carried out, then the aluminum plastic film is carried out side sealing, and then the battery with an air bag is baked, injected with liquid, formed and sealed for two times, so that the battery is formed.
Because the utmost point ear in this application has the structure different with present utmost point ear, so its manufacture process is also different.
Specifically, in the manufacturing process of the tab in the application, the manufacturing equipment needs to include an unreeling mechanism, a heat dissipation channel forming mechanism, a filling mechanism, a flattening mechanism, a rubberizing mechanism, a reeling mechanism, a splitting mechanism and the like.
The heat dissipation channel is arranged on the metal band 11 at fixed intervals (set according to the size of the tab), the heat dissipation channel can be a structure penetrating or not penetrating the metal band 11 completely, the heat dissipation channel can be formed in the manufacturing process by adopting laser firing, cutter cutting, stamping and the like, the maximum cross section thickness of the heat dissipation channel is smaller than or equal to the thickness of the metal band 11, specifically, the cross section of the heat dissipation channel can be square, trapezoid, triangle and the like, and in addition, the maximum cross section width of the heat dissipation channel is larger than or equal to 0.05mm and is smaller than or equal to half of the width of the metal band 11. The maximum length of the heat dissipation channel is related to the glue height of the tab glue (namely, an insulation glue layer) used by the tab, the glue height of the tab can exceed the maximum cross section thickness of the heat dissipation channel, namely, the tab glue covers the heat dissipation channel, and the glue height of the tab glue can also be larger than the maximum cross section thickness of the heat dissipation channel, namely, the tab glue can completely cover or unilaterally cover the heat dissipation channel. In addition, burr cleaning treatment is required in the heat dissipation channel, and particularly, the sensitive substances can be better filled into the hollow-out position through edge pressing or edge chamfering treatment.
When the heat dissipation channel reaches the sensitive material filling mechanism, the filling mechanism fills the sensitive material into the heat dissipation channel. Specifically, the filling can be performed by coating, extruding, welding, hot-sticking, pressing, and the like. After the filling is finished, the surface of the sensitive material needs to be flattened, so that the height of the surface of the material is consistent with that of the surface of the metal belt 11, and meanwhile, the sensitive material can fill the heat dissipation channel, so that the subsequent procedure is convenient for rubberizing.
After the heat dissipation channel is filled and the filling material is flattened, the material filling position reaches the adhesive sticking position, the insulating adhesive is sent out by a specific mechanism, the insulating adhesive and the metal belt 11 are stuck together in a heating and pressing mode, and an insulating adhesive layer is formed and covers the surface of the sensitive material.
Utmost point ear after the preparation is accomplished, can directly carry out the rolling, perhaps fall into sheet material through cutting the mechanism, then carry out the fillet and handle, later utmost point ear passes through welded mode, be connected with electric core 20, then utmost point ear insulating cement is connected through the top seal with the plastic-aluminum membrane, increase the plastic-aluminum membrane (being packaging part 30) to electric core 20 protection in the electric core 20 outside, insulating cement can link together utmost point ear and plastic-aluminum membrane and carry out insulating separation, later carry out the side seal again, then the battery that has the gasbag is again toasted, annotate the liquid, become, process such as two seals, the battery shaping.
The embodiment of the application also provides electronic equipment comprising the battery. It should be noted that the implementation manner of the embodiment of the battery is also applicable to the embodiment of the electronic device, and can achieve the same technical effect, and details are not repeated here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. The tab is characterized by comprising a tab body and a filling piece;
a heat dissipation channel is arranged in the tab body, and the filling piece is positioned in the heat dissipation channel;
the heat dissipation channel is in a closed state under the condition that the filling piece is in the first state, and the heat dissipation channel is in an open state under the condition that the filling piece is in the second state;
in case of a phase change and/or a volume change of the filling member, the filling member changes from the first state to the second state.
2. The tab as claimed in claim 1, wherein the tab is used for electrically connecting a cell of a battery with an external circuit;
and when the temperature of the battery core is greater than a preset temperature value and/or the pressure of the battery core is greater than a preset pressure value, the filling piece is changed from the first state to the second state so as to open the heat dissipation channel.
3. The tab as claimed in claim 1, wherein the tab body comprises a metal strip and first and second layers of adhesive disposed on the metal strip;
the second insulating glue layer and the first insulating glue layer are oppositely arranged, and the metal belt is positioned between the first insulating glue layer and the second insulating glue layer; a groove is formed in the metal strip, an opening of the groove faces the first insulating adhesive layer, the filling piece is located in the groove, and the groove forms a heat dissipation channel.
4. A tab as claimed in claim 3, wherein the grooves extend at least partially through the metal strip in a thickness direction of the metal strip.
5. A tab as claimed in claim 3, wherein the width of the groove is less than one-half of the width of the metal strip.
6. The tab as claimed in claim 3, wherein the sectional shape of the groove includes any one of a square shape, a trapezoid shape, a triangular shape, an arc shape and a cylindrical shape.
7. The tab as claimed in claim 1, wherein the filler includes at least one of a temperature sensitive material and/or a pressure sensitive material.
8. The tab as claimed in claim 7, wherein the temperature sensitive material is at least one of polypropylene, polyethylene, propylene, ethylene copolymer, propylene, ethylene derived copolymer, and/or,
the pressure sensitive material is at least one of alumina, ceramic, polyvinyl chloride (PVC), Polyformaldehyde (POM), vinyl acetate copolymer and the like.
9. A tab as claimed in claim 3, wherein the top surface of the filler is flush with the top surface of the metal strip with the filler in the first condition.
10. The tab as claimed in claim 3, wherein the first or second layer of adhesive covers at least one side edge of the groove along the length of the metal strip.
11. A battery, comprising: a cell, a package and the tab of any of claims 1-10;
the battery cell is arranged in the packaging part, the lug is connected with the battery cell and penetrates through the packaging part of the packaging part.
12. The battery of claim 11, wherein a projection of a first side edge in the thickness direction of the tab is located inside a projection of a second side edge in the thickness direction of the tab, wherein the first side edge is a side edge of the encapsulation portion away from the battery cell, and the second side edge is a side edge of the heat dissipation channel away from the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210104760.1A CN114497913A (en) | 2022-01-28 | 2022-01-28 | Utmost point ear and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210104760.1A CN114497913A (en) | 2022-01-28 | 2022-01-28 | Utmost point ear and battery |
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| Publication Number | Publication Date |
|---|---|
| CN114497913A true CN114497913A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210104760.1A Pending CN114497913A (en) | 2022-01-28 | 2022-01-28 | Utmost point ear and battery |
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| CN (1) | CN114497913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115832398A (en) * | 2022-12-21 | 2023-03-21 | 重庆太蓝新能源有限公司 | Laminate polymer battery encapsulation frock and laminate polymer battery encapsulation equipment |
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| CN115832398B (en) * | 2022-12-21 | 2023-08-01 | 重庆太蓝新能源有限公司 | Soft packet of battery encapsulation frock and soft packet of battery encapsulation equipment |
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