CN218586019U - Current collector, pole piece, battery and electric equipment thereof - Google Patents
Current collector, pole piece, battery and electric equipment thereof Download PDFInfo
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- CN218586019U CN218586019U CN202222395353.9U CN202222395353U CN218586019U CN 218586019 U CN218586019 U CN 218586019U CN 202222395353 U CN202222395353 U CN 202222395353U CN 218586019 U CN218586019 U CN 218586019U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of batteries, in particular to a current collector, a pole piece, a battery and electric equipment thereof, wherein the current collector comprises a base layer and an insulating layer, and the insulating layer is arranged on at least one surface of the base layer; the insulating layer is provided with N through holes along the thickness direction, the N through holes are communicated to the base layer, and N is a positive integer. The utility model provides a mass flow body has insulating coating at mass flow body surface coating to set up the through hole that runs through insulating layer thickness on the insulating layer, when at insulating layer surface coating active material, active material is filled in the through hole and is connected with the basic unit, adopts this kind of structural design, has greatly reduced the risk that lithium ion battery takes place mass flow body contact short circuit.
Description
Technical Field
The utility model belongs to the technical field of the battery, concretely relates to mass flow body, pole piece, battery and consumer thereof.
Background
With the rapid development of the technology, lithium ion batteries have been widely used in various fields of life, and the safety problem of the lithium ion batteries is concerned more and more. The large current and high temperature generated by internal or external short circuits in lithium ion batteries are very likely to cause combustion, explosion or other battery safety problems. There are four modes of internal short circuit, and the risk of the four short circuit modes is from high to low: cathode current collector-anode active material > cathode current collector-anode current collector > cathode active material-anode active material > anode current collector-cathode material.
The protective coating is coated on the surface of the current collector, so that three short circuit modes can be effectively avoided, and the method is a safe technical method of the lithium ion battery commonly used at present. However, most of the current safety coating materials are conductive and non-malleable coating materials, the current path can still be formed on the surface of the current collector due to the conductive characteristic, and the probability of short circuit caused by contact of the active substance and the current collector with opposite polarity is still high. And the protective coating is easy to peel off and fall off from the surface of the current collector when being impacted by external force, so that the protective effect is greatly reduced. And once the current collector breaks, the protective coating can not cover the fracture of the current collector, and the fracture is extremely easy to have the risk of contact short circuit.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an one of the purpose lies in: in view of the deficiencies of the prior art, a current collector is provided to solve the technical problems in the technical background.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a current collector comprises a base layer and an insulating layer, wherein the insulating layer is arranged on at least one surface of the base layer; the insulating layer is provided with N through holes along the thickness direction, the N through holes are communicated to the base layer, and N is a positive integer.
Furthermore, the N through holes are arranged in a rectangular array, and the shapes and the sizes of the N through holes are consistent.
Further, the N through holes include N first through holes and m second through holes, and the hole shapes of the first through holes and the second through holes are different, wherein N and m are positive integers, and N + m = N.
Furthermore, the n first through holes and the m second through holes are arranged in a straight line shape in the horizontal direction and are arranged at intervals in the vertical direction, wherein n = m.
Furthermore, the N through holes are one or a combination of a vertical structure, an inclined structure, an arc structure and a broken line structure.
Further, the material of the insulating layer is selected from one of BaSO4, caSiO3, gamma-AlOOH, caSiO4 and polytetrafluoroethylene.
The utility model discloses a second of purpose lies in: the pole piece comprises the current collector and an active substance layer, wherein the active substance layer is arranged on the surface of the insulating layer, and at least one part of the active substance layer is positioned in the through hole.
The third purpose of the utility model is that: a battery is provided, which comprises the pole piece.
The fourth purpose of the utility model lies in: an electric device is provided, comprising the battery.
The beneficial effects of the utility model reside in that:
(1) The utility model provides a mass flow body has insulating coating at mass flow body surface coating to set up the through hole that runs through insulating layer thickness on the insulating layer, when at insulating layer surface coating active material, active material is filled in the through hole and is connected with the basic unit, adopts this kind of structural design, has greatly reduced the risk that lithium ion battery takes place mass flow body contact short circuit.
(2) The utility model provides an insulating layer, it still has good ductility, and when the mass flow body received foreign object mechanical shock, the ductility of insulating layer can improve the toughness of pole piece, and the insulating layer can cushion partial effort, reduces the cracked risk of mass flow body. Meanwhile, the insulating layer stretches under the condition that the current collector is broken, so that the insulating layer is attached to the fracture of the current collector after being stretched, a protection effect is achieved, and the safety performance of the lithium ion battery is greatly improved.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a vehicle in embodiment 5 of the present invention;
fig. 2 is a schematic structural diagram of a current collector in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a current collector in embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of a current collector in embodiment 3 of the present invention;
fig. 5 is one of schematic cross-sectional views of a current collector in embodiment 1 of the present invention;
fig. 6 is a second schematic cross-sectional view of a current collector in embodiment 1 of the present invention;
fig. 7 is a third schematic cross-sectional view of a current collector in embodiment 1 of the present invention;
fig. 8 is a fourth schematic cross-sectional view of a current collector in embodiment 1 of the present invention;
wherein the reference numerals are as follows:
1. a base layer; 2. an insulating layer; 3. an active material layer; 4. a through hole; x, horizontal direction; y, vertical direction;
100. a vehicle; 101. a battery.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present invention will be described in further detail with reference to fig. 1 to 8, but the present invention is not limited thereto.
Example 1
The embodiment of the utility model provides a current collector, which comprises a base layer 1 and an insulating layer 2, wherein the insulating layer 2 is arranged on the upper surface and the lower surface of the base layer 1; the insulating layer 2 is provided with N through holes 4 along the thickness direction, the N through holes 4 are communicated to the base layer 1, and N is a positive integer.
In the present embodiment, the material of the insulating layer 2 is selected from one of BaSO4, caSiO3, γ -AlOOH, caSiO4, and teflon. In the present embodiment, when the current collector is a negative electrode current collector, the base layer 1 may be selected from one of copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, and copper foam, and when the current collector is a positive electrode current collector, the base layer 1 may be selected from aluminum foil.
In this embodiment, the N through holes 4 are arranged in a rectangular array, and the shapes and sizes of the N through holes 4 are all the same. More specifically, the shape of the N through holes 4 is circular, triangular, or square.
In order to ensure that the active material coated on the insulating layer can contact the base layer 1, in the present embodiment, the depth of the N through holes 4 provided on the insulating layer 2 is equal to the thickness of the insulating layer 2, that is, the through holes 4 communicate with the base layer 1, and when the active material is coated on the insulating layer 2, a part of the active material enters the through holes 4 and contacts the base layer 1.
In the present embodiment, the through hole 4 is one or a combination of a vertical structure, an inclined structure, an arc structure, or a broken line structure.
Example 2
Different from the embodiment 1, the N through holes 4 are irregularly arranged.
The other structures are the same as embodiment 1, and are not described herein.
Example 3
Different from embodiment 1, in the current collector provided in embodiment 3, the N through holes 4 include N first through holes and m second through holes, and hole shapes of the first through holes and the second through holes are different, where N and m are positive integers, and N + m = N.
More specifically, n first through-holes and m second through-holes all are a style of calligraphy and arrange on horizontal direction X, and are interval arrangement on vertical direction Y, wherein, n = m.
The other structures are the same as embodiment 1, and are not described herein.
Example 4
This embodiment 4 provides a pole piece, which includes the current collector and the active material layer 3, the active material layer 3 is disposed on the surface of the insulating layer 2, and at least a portion of the active material layer 3 is located in the through hole 4.
In this example 4, when the tab is a positive tab, the base layer 1 is aluminum foil and the positive active material includes but is not limited to LiCoO 2 、LiNiO 2 、LiVO 2 、LiCrO 2 、LiMn 2 O 4 、LiCoMnO 4 、Li 2 NiMn 3 O 8 、LiNi 0.5 Mn 1.5 O 4 、LiCoPO 4 、LiMnPO 4 、LiFePO 4 、LiNiPO 4 、LiCoFSO 4 、CuS 2 、FeS 2 、MoS 2 、NiS、TiS 2 And the like, the positive electrode active material is coated on the insulating layer 2 to form a positive electrode active material layer 3, and part of the positive electrode active material is filled in the through-holes 4.
In this embodiment 4, when the electrode sheet is a negative electrode sheet, the base layer 1 is selected from one of copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, and copper foam, and the negative electrode active material includes but is not limited to: lithium metal, structured lithium metal, natural graphite, artificial graphite, mesophase micro carbon spheres (MCMB), hard carbon, soft carbon, silicon carbon composites. Wherein silicon carbon composite means at least about 5 wt% silicon based on the weight of the silicon carbon negative electrode active material.
Example 5
This embodiment 5 provides a battery, includes above-mentioned pole piece. More specifically, the battery in this example 5 includes a case, an electrode assembly, and an electrolyte.
The electrode assembly consists of a positive plate, a negative plate and a diaphragm, and the battery mainly depends on metal ions moving between the positive plate and the negative plate to work. The material of the diaphragm may be Polypropylene (PP), polyethylene (PE), or the like. In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.
The shell includes casing and lid, and the casing is cavity structure, and the at least one end of casing is provided with opens the mouth, and electrode subassembly is followed and is opened mouthful interior back of packing into the casing, through covering the lid in opening mouthful department to seal or modes such as laser welding seal through the mound, realize sealing to battery case, prevent that gaseous state, liquid or solid state material from circulating between inside and the outside in the shell, influence the free performance of battery.
The cover generally needs to be electrically connected to the positive electrode tab or the negative electrode tab of the electrode assembly in order to deliver the current generated by the electrochemical reaction of the electrode assembly to the electrical device.
Example 6
This embodiment 6 provides an electric device including the battery described above.
The powered device may be a vehicle 100, a cell phone, a portable device, a laptop, a boat, a spacecraft, an electric toy, an electric tool, and the like. The vehicle 100 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc.; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.
For convenience of description, the electric device is taken as the vehicle 100 as an example.
For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 100 according to embodiment 6 of the present application, the vehicle 100 may be a fuel-oil vehicle, a gas-fired vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 100 may be provided with a motor, a controller and a battery 101 inside, and the controller is used to control the battery 101 to supply power to the motor. For example, the battery 101 may be provided at the bottom or the head or tail of the vehicle 100. The battery 101 may be used for powering the vehicle 100, for example, the battery 101 may be used as an operating power source for the vehicle 100 for circuitry of the vehicle 100, for example, for power requirements for operation during start-up, navigation, and operation of the vehicle 100. In another embodiment of the present application, the battery 101 may be used not only as an operating power source of the vehicle 100, but also as a driving power source of the vehicle 100, instead of or in part replacing fuel or natural gas to provide driving power for the vehicle 100.
Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments described herein may be combined as a whole by one or more of the claims, to form other embodiments as would be understood by one or more of ordinary skill in the art.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art based upon the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. A current collector, characterized by: comprises that
A base layer (1);
the insulating layer (2), the said insulating layer (2) is set up in at least a surface of the said basic unit (1);
the insulating layer (2) is provided with N through holes (4) along the thickness direction, the N through holes (4) are communicated to the base layer (1), and N is a positive integer.
2. A current collector as claimed in claim 1, wherein: the N through holes (4) are arranged in a rectangular array, and the shape and the size of the N through holes (4) are consistent.
3. A current collector as claimed in claim 1, wherein: the N through holes (4) comprise N first through holes and m second through holes, the hole shapes of the first through holes and the second through holes are different, N and m are positive integers, and N + m = N.
4. A current collector as claimed in claim 3, wherein: the n first through holes and the m second through holes are arranged in a straight line shape in the horizontal direction (X) and are arranged at intervals in the vertical direction (Y), wherein n = m.
5. A current collector as claimed in claim 1, wherein: the N through holes (4) are in one or more combinations of a vertical structure, an inclined structure, an arc-line structure or a broken-line structure.
6. A current collector as claimed in claim 1, wherein: the material of the insulating layer (2) is selected from BaSO 4 、CaSiO 3 、γ-AlOOH、CaSiO 4 And polytetrafluoroethylene.
7. A pole piece, characterized by: comprising the current collector of any one of claims 1 to 6 and an active substance layer (3), said active substance layer (3) being provided on the surface of said insulating layer (2) and at least a part of said active substance layer (3) being located within said through-hole (4).
8. A battery comprising the pole piece of claim 7.
9. An electric device comprising the battery according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222395353.9U CN218586019U (en) | 2022-09-09 | 2022-09-09 | Current collector, pole piece, battery and electric equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222395353.9U CN218586019U (en) | 2022-09-09 | 2022-09-09 | Current collector, pole piece, battery and electric equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218586019U true CN218586019U (en) | 2023-03-07 |
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ID=85365747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222395353.9U Active CN218586019U (en) | 2022-09-09 | 2022-09-09 | Current collector, pole piece, battery and electric equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218586019U (en) |
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2022
- 2022-09-09 CN CN202222395353.9U patent/CN218586019U/en active Active
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