CN113764835A - Battery safety protection device and laminated lithium ion battery - Google Patents
Battery safety protection device and laminated lithium ion battery Download PDFInfo
- Publication number
- CN113764835A CN113764835A CN202010461098.6A CN202010461098A CN113764835A CN 113764835 A CN113764835 A CN 113764835A CN 202010461098 A CN202010461098 A CN 202010461098A CN 113764835 A CN113764835 A CN 113764835A
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- battery
- protection device
- safety protection
- lithium ion
- copper foil
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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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a battery safety protection device, which comprises a copper foil, an aluminum foil, a thermal contraction film and a packaging shell; the copper foil and the aluminum foil are oppositely arranged; the thermal contraction film is arranged between the copper foil and the aluminum foil to separate the copper foil and the aluminum foil, and when the temperature of the thermal contraction film exceeds a preset temperature, the thermal contraction film contracts the copper foil and the aluminum foil to be conducted; and the copper foil, the aluminum foil and the heat-shrinkable film are hermetically packaged in the packaging shell. The battery safety protection device is arranged inside or outside the lithium ion battery, and is in an open circuit state at the normal working temperature and working state of the lithium ion battery; when the temperature of the lithium ion battery rises and reaches the thermal shrinkage temperature of a thin film in the battery safety protection device due to abnormal conditions such as electric abuse, thermal abuse, mechanical abuse and the like, copper and aluminum foils in the battery safety protection device are conducted to form a current loop, so that electric energy can be rapidly released, and the safety performance of the lithium ion battery under severe conditions is improved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a battery safety protection device and a laminated lithium ion battery.
Background
With the aggravation of the environmental problem and the petroleum resource problem of the fuel automobile, the popularization of new energy automobiles is gradually increased, and the popularization rate of electric automobiles is higher and higher. Lithium ion batteries are widely used in the electric vehicle industry due to their high energy density, good cycle performance and environmental protection performance, and the safety performance requirements for lithium ion batteries are also increasing. The safety performance of the lithium ion battery becomes a main influence factor for popularization of the high-specific-energy battery, and especially, explosion of the battery caused by improper operations such as overcharge, overdischarge, needling, thermal runaway and the like is the most dangerous factor.
The explosion of lithium ion batteries is composed of a series of exothermic reactions, mainly comprising: the method comprises the following steps of SEI film decomposition, reaction of a negative electrode and an electrolyte, electric energy release by short circuit of a positive electrode plate and a negative electrode plate, oxidation reduction of a positive electrode material and the negative electrode material, and the like, wherein the two reactions of the electric energy release by the short circuit of the positive electrode plate and the negative electrode plate and the oxidation reduction of the positive electrode material and the negative electrode material are main sources of heat. Therefore, how to release the electric energy of the battery with the explosion risk under the safety condition and cut off the chain type heat release of the battery, thereby improving the safety performance of the lithium ion battery.
Disclosure of Invention
A first object of the present invention is to provide a battery safety protection device, which can solve the risk of explosion of a battery;
a second object of the present invention is to provide a laminated lithium ion battery employing the battery safety protection device as described above.
The invention provides a battery safety protection device, which comprises a copper foil, an aluminum foil, a thermal contraction film and a packaging shell;
the copper foil and the aluminum foil are oppositely arranged;
the thermal contraction film is arranged between the copper foil and the aluminum foil to separate the copper foil and the aluminum foil, and when the temperature of the thermal contraction film exceeds a preset temperature, the thermal contraction film contracts the copper foil and the aluminum foil to be conducted;
the copper foil, the aluminum foil and the heat shrinkable film are hermetically packaged in the packaging shell.
Preferably, the preset temperature is 70-150 ℃.
Preferably, the thickness of the heat-shrinkable film is 0.001mm to 1 mm;
the lengths of the copper foil and the aluminum foil are 1-5mm smaller than that of the packaging shell.
Preferably, the material of the heat-shrinkable film comprises PVC, PETG or EVA.
Preferably, the material of the package housing includes PP, PE or PI.
A laminated lithium ion battery comprising a battery safety protection device as described above.
Preferably, the laminated lithium ion battery further comprises a negative plate, a positive plate, a diaphragm, a negative electrode tab, a positive electrode tab and an aluminum-plastic film;
the negative plate, the diaphragm and the positive plate are sequentially laminated to form a battery cell structure;
the battery safety protection device is arranged on the outer side of the battery cell structure, and the battery cell structure and the battery safety protection device are connected with a positive electrode lug and a negative electrode lug through current collectors;
the battery safety protection device and the battery core structure are packaged in the aluminum plastic film.
Preferably, the length and width of the packaging shell are the same as those of the positive plate and the negative plate.
Preferably, the laminated lithium ion battery further comprises a negative plate, a positive plate, a diaphragm, a negative electrode tab, a positive electrode tab and an aluminum-plastic film;
the negative plate, the diaphragm and the positive plate are sequentially laminated to form a battery cell structure;
the battery cell structure is packaged in an aluminum plastic film to form a battery structure, and the battery safety protection device is arranged on the outer side of the battery structure;
the battery cell structure and the battery safety protection device are connected with the positive pole lug and the negative pole lug.
Preferably, the length and width of the packaging shell are the same as those of the battery structure.
Has the advantages that:
the battery safety protection device is prefabricated and arranged inside or outside the laminated lithium ion battery. When the lithium ion battery is at the normal working temperature, the thermal contraction diaphragm in the battery safety protection device is in the normal non-contraction state, the copper foil and the aluminum foil in the safety protection device can be isolated, and the battery safety protection device is in the open circuit state; when the temperature of the lithium ion battery abnormally rises due to improper conditions of electric abuse, thermal abuse, mechanical abuse and the like, and when the temperature of the battery reaches the shrinkage temperature of a thermal shrinkage film in the battery safety protection device, a copper foil and an aluminum foil in the battery safety protection device are conducted to form a current loop, and electric energy contained in the battery is rapidly released through the battery safety protection device, so that the thermal runaway risk under the condition of battery abuse is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1a is a top view of a battery safety protection device provided in the present invention;
FIG. 1b is a side view of a battery safety protection device provided in the present invention;
fig. 2 is a schematic structural diagram of a battery safety protection device provided by the invention arranged inside a laminated lithium ion battery;
fig. 3 is a schematic structural diagram of a battery safety protection device provided by the present invention disposed outside a laminated lithium ion battery.
Description of reference numerals:
11: aluminum foil; 12: copper foil; 13: a heat-shrinkable film; 14: a package housing;
21: a negative plate; 22: a positive plate; 23: a diaphragm; 24: a negative electrode tab; 25: a positive electrode tab; 26: a battery safety protection device; 27: an aluminum-plastic film;
31: a negative plate; 32: a positive plate; 33: a diaphragm; 34: a negative electrode tab; 35: a positive electrode tab; 36: a battery safety protection device; 37: and (3) an aluminum plastic film.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity 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 thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1a and 1b, the present embodiment provides a battery safety protection device including an aluminum foil 11, a copper foil 12, a heat-shrinkable film 13, and a package can 14.
The copper foil 11 and the aluminum foil 12 are oppositely arranged, the heat-shrinkable film 13 is arranged between the aluminum foil 11 and the copper foil 12 to separate the aluminum foil 11 and the copper foil 12, and when the temperature of the heat-shrinkable film 13 exceeds a preset temperature, the heat-shrinkable film 13 shrinks the aluminum foil 11 and the copper foil 12 to be conducted.
The aluminum foil 11, the copper foil 12 and the heat-shrinkable film 13 are hermetically sealed in a package can 14.
When the battery is at the normal working temperature, the thermal contraction film 13 isolates the aluminum foil 11 and the copper foil 12, the battery safety protection device is in an open circuit state, when the temperature of the thermal contraction film 13 exceeds the preset temperature, the thermal contraction film 13 contracts the aluminum foil 11 and the copper foil 12 to be conducted, so that the battery safety protection device forms a current loop, the electric energy of the battery safety protection device is rapidly released, chain type heat release is prevented, the thermal runaway risk of the battery under the abuse condition is reduced, and the problem of battery explosion is avoided.
The heat-shrinkable film 13 is shrunk at a temperature exceeding a preset temperature, wherein the specific value of the preset temperature can be set according to actual needs. In this embodiment, the preset temperature is 70 to 150 ℃.
The thickness of the heat shrinkable film 13 is 0.001mm to 1mm, and the heat shrinkable film 13 has such a thickness that conduction between the aluminum foil 11 and the copper foil 12 is facilitated after the heat shrinkable film 13 is shrunk.
The material of the heat-shrinkable film 13 includes PVC, PETG or EVA, that is, any polymer material that is insulating and can be shrunk after being heated to a certain temperature can be used to manufacture the heat-shrinkable film 13.
The material of the package housing 14 includes PP, PE or PI, that is, a polymer material insoluble in the electrolyte can be used to manufacture the package housing 14.
The dimensions of the aluminum foil 11, the copper foil 12 and the heat shrinkable film 13 are 1-5mm longer and narrower than the package shell 14, so that the packaging operation is facilitated. Specifically, the aluminum foil 11, the copper foil 12, the heat-shrinkable film 13 and the package housing 14 all adopt a rectangular structure.
In this embodiment, there is also provided a laminated lithium ion battery including the battery safety protection device as described above.
In order to provide a detailed description of the above laminated lithium ion battery, the following examples are also provided to provide a detailed description thereof.
The first embodiment is as follows:
as shown in fig. 2, in the present embodiment, a specific structural form of a laminated lithium ion battery is provided. In the laminated lithium ion battery with the structure, the battery safety protection device is arranged inside the laminated lithium ion battery.
Specifically, the laminated lithium ion battery comprises a negative plate 21, a positive plate 22, a diaphragm 23, a negative tab 24, a positive tab 25, a battery safety protection device 26 and an aluminum plastic film 27.
The negative plate 21, the diaphragm 23 and the positive plate 22 are laminated in sequence to form a cell structure.
The battery safety protection device 26 is arranged outside the cell structure, and both the cell structure and the battery safety protection device are connected with the negative pole lug 24 and the positive pole lug 25 through current collectors. The battery safety protection device 26 and the cell structure are encapsulated in an aluminum plastic film 27.
The manufacturing process of the laminated lithium ion battery with the structure comprises the following steps: the negative plate 21, the diaphragm 23 and the positive plate 22 are sequentially laminated to form a cell structure, the battery safety protection device 26 is arranged on the outermost side of the cell structure, a current collector of the cell structure and a current collector of the battery safety protection device 26 are connected with tabs together, finally the cell structure and the battery safety protection device 26 are packaged through an aluminum plastic film 27, and then the laminated lithium ion battery with the battery safety protection device is obtained after vacuumizing, liquid injection, shelving and pre-charging.
The battery safety protection device is disposed inside the laminated lithium ion battery, and the package housing of the battery safety protection device 26 is made of one of PP, PE, PI, and other polymer materials insoluble in the electrolyte, and can isolate and protect the heat shrinkable film from the electrolyte. When the battery is at normal operating temperature, the battery safety protection device 26 is in an off state; when the temperature of the battery is abnormally increased due to severe conditions such as electric abuse, thermal abuse, mechanical abuse and the like, due to the fact that the thermal shrinkage temperature of the thermal shrinkage films such as PVC, PETG and EVA is low, thermal shrinkage can occur just when the battery enters the abnormal temperature, the battery safety protection device 26 forms a current loop, electric energy of the battery is rapidly released, chain type heat release is prevented, and the thermal runaway risk of the battery under the abuse condition is reduced.
In the present embodiment, the length and width of the safety protection device 26 are preferably the same as those of the negative electrode plate 21 and the positive electrode plate 22, which facilitates the later battery assembly and packaging, and also avoids the reduction of the flow area after the safety protection device 26 is turned on when the size of the safety protection device 26 is smaller than that of the negative electrode plate 21 and the positive electrode plate 22.
In the present embodiment, the safety protection device 26, the negative electrode tab 21 and the positive electrode tab 22 are preferably aligned to facilitate the later assembly and packaging of the battery.
In the present embodiment, the current collector foils reserved for the safety protection device 26, the negative plate 21 and the positive plate 22 are respectively connected to the negative tab 24 and the positive tab 25 by welding.
Example two:
as shown in fig. 3, in the present embodiment, a specific structural form of a laminated lithium ion battery is provided. In the laminated lithium ion battery with the structure, the safety protection device is arranged outside the laminated lithium ion battery.
In this embodiment, the laminated lithium ion battery includes a negative electrode sheet 31, a positive electrode sheet 32, a separator 33, a negative electrode tab 34, a positive electrode tab 35, a battery safety protection device 36, and an aluminum plastic film 37.
The negative plate 31, the diaphragm 33 and the positive plate 32 are laminated in sequence to form a cell structure. The cell structure is packaged in an aluminum plastic film 37 to form a battery structure, and a battery safety protection device 36 is arranged outside the battery structure. The cell structure and the battery safety protection device 36 are connected with the negative electrode tab 34 and the positive electrode tab 36.
The manufacturing process of the laminated lithium ion battery of the embodiment is as follows: the negative plate 31, the diaphragm 33 and the positive plate 32 are sequentially laminated to prepare a cell structure, a negative tab 34 and a positive tab 35 are welded on the cell structure and then packaged through an aluminum-plastic film 37 to obtain a battery structure, the battery structure is packaged through the aluminum-plastic film 37, a lithium ion battery is obtained after vacuumizing, liquid injection, placement and pre-charging are completed, a battery safety protection device 36 is arranged on the outermost side of the battery structure, and finally a reserved current collector of the battery safety protection device 36 is connected with the positive tab and the negative tab, so that the laminated lithium ion battery with the battery safety protection device is obtained.
The advantage of this embodiment lies in, battery safety arrangement 36 sets up in the battery outside, can not influence the manufacturing process of battery cell, only needs to install battery safety arrangement additional in the battery outside when battery module assembles, and battery safety arrangement's reservation mass flow body links to each other with positive negative pole utmost point ear. When the battery is at the normal working temperature, the battery safety protection device is in an open circuit state; when the temperature of the battery is abnormally increased due to severe conditions such as electric abuse, thermal abuse, mechanical abuse and the like, the thermal shrinkage temperature of the thermal shrinkage films such as PVC, PETG and EVA is low, and the thermal shrinkage can be generated when the battery just enters the abnormal temperature, so that the battery safety protection device forms a current loop, the electric energy of the battery is rapidly released, chain type heat release is prevented, and the thermal runaway risk of the battery under the abuse condition is reduced.
In the present embodiment, the length and width of the battery safety protection device 36 are preferably the same as the length and width of the packaged battery, which facilitates the installation of the battery safety protection device outside the battery during the assembly process, and also avoids the reduction of the flow area after the battery safety protection device is turned on when the length and width of the battery safety protection device is smaller than the length and width of the battery.
This embodiment is preferred, and battery safety arrangement and battery align to set up, the later stage module assembly of being convenient for.
Preferably, the current collector foil reserved in the battery safety protection device is connected with the positive and negative electrode tabs of the battery through welding.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A battery safety protection device is characterized by comprising a copper foil, an aluminum foil, a thermal contraction film and a packaging shell;
the copper foil and the aluminum foil are oppositely arranged;
the thermal contraction film is arranged between the copper foil and the aluminum foil to separate the copper foil and the aluminum foil, and when the temperature of the thermal contraction film exceeds a preset temperature, the thermal contraction film contracts the copper foil and the aluminum foil to be conducted;
the copper foil, the aluminum foil and the heat shrinkable film are hermetically packaged in the packaging shell.
2. The battery safety protection device according to claim 1, wherein the preset temperature is 70-150 ℃.
3. The battery safety protection device according to claim 1, wherein the thickness of the heat-shrinkable film is 0.001mm to 1 mm;
the lengths of the copper foil and the aluminum foil are 1-5mm smaller than that of the packaging shell.
4. The battery safety protection device according to claim 1, wherein the material of the heat-shrinkable film comprises PVC, PETG or EVA.
5. The battery safety protection device according to claim 1, wherein the material of the package housing comprises PP, PE or PI.
6. A laminated lithium ion battery comprising a battery safety protection device according to any one of claims 1 to 5.
7. The laminated lithium ion battery of claim 6, further comprising a negative plate, a positive plate, a separator, a negative tab, a positive tab, and an aluminum plastic film;
the negative plate, the diaphragm and the positive plate are sequentially laminated to form a battery cell structure;
the battery safety protection device is arranged on the outer side of the battery cell structure, and the battery cell structure and the battery safety protection device are connected with a positive electrode lug and a negative electrode lug through current collectors;
the battery safety protection device and the battery core structure are packaged in the aluminum plastic film.
8. The laminated lithium ion battery of claim 7, wherein the package housing has the same length and width as the positive plate and the negative plate.
9. The laminated lithium ion battery of claim 7, further comprising a negative plate, a positive plate, a separator, a negative tab, a positive tab, and an aluminum plastic film;
the negative plate, the diaphragm and the positive plate are sequentially laminated to form a battery cell structure;
the battery cell structure is packaged in an aluminum plastic film to form a battery structure, and the battery safety protection device is arranged on the outer side of the battery structure;
the battery cell structure and the battery safety protection device are connected with the positive pole lug and the negative pole lug.
10. The laminated lithium ion battery of claim 9 wherein the package housing is the same length as the width of the cell structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010461098.6A CN113764835A (en) | 2020-05-27 | 2020-05-27 | Battery safety protection device and laminated lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010461098.6A CN113764835A (en) | 2020-05-27 | 2020-05-27 | Battery safety protection device and laminated lithium ion battery |
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| CN113764835A true CN113764835A (en) | 2021-12-07 |
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| CN202010461098.6A Pending CN113764835A (en) | 2020-05-27 | 2020-05-27 | Battery safety protection device and laminated lithium ion battery |
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Citations (8)
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| JP2003243037A (en) * | 2002-02-18 | 2003-08-29 | Shin Kobe Electric Mach Co Ltd | Lithium ion battery |
| CN103259051A (en) * | 2013-05-07 | 2013-08-21 | 杭州金色能源科技有限公司 | Winding-type lithium battery and battery cell thereof |
| CN103825053A (en) * | 2014-03-17 | 2014-05-28 | 山东润峰集团新能源科技有限公司 | Manufacturing process of high-performance flexible package lithium ion battery cell |
| CN203800131U (en) * | 2013-09-09 | 2014-08-27 | 宁德新能源科技有限公司 | Winding cell and electrochemical device |
| CN104868158A (en) * | 2015-05-06 | 2015-08-26 | 宁德新能源科技有限公司 | Lithium ion battery |
| CN106469832A (en) * | 2015-08-19 | 2017-03-01 | 中信国安盟固利动力科技有限公司 | A kind of safeguard construction of lithium ion battery |
| CN107919492A (en) * | 2016-10-10 | 2018-04-17 | 青岛市比亚迪汽车有限公司 | lithium ion battery, battery pack and electric bus |
| CN109037544A (en) * | 2018-10-18 | 2018-12-18 | 天津中聚新能源科技有限公司 | A kind of lithium-ion-power cell with thermal runaway control function |
-
2020
- 2020-05-27 CN CN202010461098.6A patent/CN113764835A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003243037A (en) * | 2002-02-18 | 2003-08-29 | Shin Kobe Electric Mach Co Ltd | Lithium ion battery |
| CN103259051A (en) * | 2013-05-07 | 2013-08-21 | 杭州金色能源科技有限公司 | Winding-type lithium battery and battery cell thereof |
| CN203800131U (en) * | 2013-09-09 | 2014-08-27 | 宁德新能源科技有限公司 | Winding cell and electrochemical device |
| CN103825053A (en) * | 2014-03-17 | 2014-05-28 | 山东润峰集团新能源科技有限公司 | Manufacturing process of high-performance flexible package lithium ion battery cell |
| CN104868158A (en) * | 2015-05-06 | 2015-08-26 | 宁德新能源科技有限公司 | Lithium ion battery |
| CN106469832A (en) * | 2015-08-19 | 2017-03-01 | 中信国安盟固利动力科技有限公司 | A kind of safeguard construction of lithium ion battery |
| CN107919492A (en) * | 2016-10-10 | 2018-04-17 | 青岛市比亚迪汽车有限公司 | lithium ion battery, battery pack and electric bus |
| CN109037544A (en) * | 2018-10-18 | 2018-12-18 | 天津中聚新能源科技有限公司 | A kind of lithium-ion-power cell with thermal runaway control function |
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