CN113471579A - High-capacity lithium ion battery - Google Patents

High-capacity lithium ion battery Download PDF

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Publication number
CN113471579A
CN113471579A CN202110918808.8A CN202110918808A CN113471579A CN 113471579 A CN113471579 A CN 113471579A CN 202110918808 A CN202110918808 A CN 202110918808A CN 113471579 A CN113471579 A CN 113471579A
Authority
CN
China
Prior art keywords
lithium ion
battery
ion battery
capacity lithium
pole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110918808.8A
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Chinese (zh)
Inventor
翟腾飞
雷政军
张三学
郑高锋
刘毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Olympus Power Energy Co Ltd
Original Assignee
Shaanxi Olympus Power Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shaanxi Olympus Power Energy Co Ltd filed Critical Shaanxi Olympus Power Energy Co Ltd
Priority to CN202110918808.8A priority Critical patent/CN113471579A/en
Publication of CN113471579A publication Critical patent/CN113471579A/en
Pending legal-status Critical Current

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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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
    • 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
    • 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
    • H01M10/058—Construction or manufacture
    • 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
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/543—Terminals
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The application discloses a high-capacity lithium ion battery, which comprises a battery shell, a cover plate arranged on the battery shell, an electric core group arranged in the shell and a pole connected with the electric core group, wherein the pole extends out of the cover plate; the battery cell unit and the support frame are arranged at intervals; the battery cell unit is connected with the pole, and the pole is placed in the groove of the support frame. The utility model provides a large capacity lithium ion battery connects in parallel, compresses tightly through electric core unit, through the fixed of support frame, through adding fire control cooling medium or heat pipe in lithium ion battery cavity utmost point post, through the design of tubulose pressure release mouth that can series connection, effectual control large capacity battery's inside temperature, improved large capacity battery's security.

Description

High-capacity lithium ion battery
Technical Field
The application relates to the field of batteries, in particular to a high-capacity lithium ion battery.
Background
The square battery with the maximum capacity of the lithium battery in the current market is 400Ah, the cylindrical battery with the maximum capacity is not more than 100Ah, under the background of 'carbon peak reaching' and 'carbon neutralization', the energy storage industry is expected to be greatly developed, but is influenced by the battery capacity, the lithium battery needs to be connected in series and parallel of a plurality of batteries when the energy storage is applied, so that connecting parts are various, the connecting steps are complex and cumbersome, the use amounts of a battery management system, a wire rod and a battery box are very large, and the energy storage cost is high.
Disclosure of Invention
In order to solve the technical problem, the technical scheme adopted by the application is as follows:
the application provides a high-capacity lithium ion battery, which comprises a battery shell, a cover plate arranged on the battery shell, an electric core group arranged in the shell and a pole connected with the electric core group, wherein the pole extends out of the cover plate, and the battery group comprises a plurality of electric core units and a plurality of supporting frames used for fixing and pressing the electric core units; the battery cell unit and the support frame are arranged at intervals; the battery cell unit is connected with the pole, and the pole is placed in the groove of the support frame.
Further, in the embodiments provided in the present application, the support frame includes a pressing plate for spacing the cell units, and an adjustable support rod for connecting the pressing plate. The support rods are of hollow structures, and the support rods can be connected in series. The support frame is made of heat conducting material.
Further, in the embodiments provided in the present application, the pole is a sealed hollow cylinder, and the pole is a hollow cylinderThe hollow column is filled with phase-change fire-fighting material perfluorohexanone or freon, the pole is vacuumized, and the vacuum degree is 3X 10-1～10-4Pa. The bottom of the pole is sealed by fusible alloy, and the melting point of the fusible alloy is more than or equal to 130 ℃.
Further, in the embodiment that this application provided, utmost point post is sealed cavity cylinder, it has fire control material perfluor hexanone or phosphorus flame retardant solution or foam extinguishing agent or gaseous fire extinguishing agent to fill in the cavity cylinder, and the utmost point post bottom is sealed through fusible alloy, and fusible alloy's melting point is more than or equal to 130 ℃, and the soaking tube is inlayed to utmost point post outer wall.
Further, in the embodiment that this application provided, the apron is equipped with the through-hole that is used for annotating liquid and pressure release, the through-hole can be connected the mouth of pipe outward and annotate the liquid. The through hole for injecting liquid and releasing pressure can also be arranged on the battery shell. The through hole is also connected with a pressure relief pipe, and a pressure relief film or a spring type pressure valve is arranged between the pressure relief pipe and the through hole. When a plurality of batteries are used in series, the pressure relief pipes can be connected in parallel through pipelines.
The utility model provides a large capacity lithium ion battery, parallelly connected, compress tightly through electric core unit, through the fixed of support frame, through add fire control cooling medium or inlay the heat pipe in lithium ion battery cavity utmost point post, through the design of tubulose pressure release mouth that can series connection, effectual control large capacity battery's inside temperature, improved large capacity battery's security.
Additional advantages, objects, and features of the application will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application 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, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a battery structure according to an embodiment of the present disclosure (without a cover terminal).
Fig. 2 is a schematic diagram of a battery structure (a post with a cover plate) according to an embodiment of the present application.
Fig. 3 is a schematic structural view of the electric core assembly according to the embodiment of the present application.
Fig. 4 is a schematic view of an assembly structure of a battery cell unit and a support frame according to an embodiment of the present application.
Fig. 5 is a schematic diagram of a structure of a pressing plate according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a support rod according to an embodiment of the present application.
Fig. 7 is a schematic view of a pole structure according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of a housing according to an embodiment of the present application.
Fig. 9 is a schematic structural diagram of a cover plate according to an embodiment of the present application.
Detailed Description
The present application will now be described in further detail with reference to the accompanying drawings, whereby one skilled in the art can, with reference to the description, make an implementation.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The technical solution of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 9, the present application provides a high-capacity lithium ion battery, which includes a battery housing 1, a cover plate 2 disposed on the battery housing 1, a cell group 3 disposed in the housing 1, and a pole 4 connected to the cell group 3, where the pole 4 extends out of the cover plate 2, and the cell group 3 includes a plurality of cell units 31 and a plurality of support frames 32 for fixing and pressing the cell units 31; the battery cell unit 31 and the support frame 32 are arranged at intervals; the battery cell unit 31 is connected with the pole 4, and the pole 4 is placed in the groove of the support frame 32.
Further, the cell unit 31 includes a plurality of winding core cells or a plurality of lamination cells.
As shown in fig. 3 to 6, optionally, in the embodiment provided in the present application, the supporting frame 32 includes a pressing plate 321 for spacing a plurality of battery cell units, and a plurality of supporting rods 322 for connecting two pressing plates 321.
Specifically, the pressure strip is provided with a groove, and the pole is placed in the groove.
As shown in fig. 3 and 6, optionally, in the embodiment provided in the present application, the supporting rods 322 are hollow structures, and it should be noted that when the supporting frames 32 are connected in sequence, the supporting rods 322 may be connected in series with each other.
Optionally, in the embodiment provided in the present application, the supporting frame 32 is made of a heat conducting material.
That is, when the battery pack is manufactured, the cell unit is firstly placed on one compression plate, then a second compression plate is placed on the cell unit, the two compression plates are connected through the support rod, the cell unit is compressed and fixed at the same time, and finally, the cell units and the support frames are sequentially arranged in total to form the battery pack; it should be noted that, when assembling the battery pack, when each group assembles an electric core unit and a support frame, the electric core unit and the pole column need to be connected, and the difficulty of connecting the electric core unit and the pole column caused by the completion of the assembly of the electric core unit and the support frame is avoided.
Optionally, in the embodiment provided in this application, the terminal 4 is a sealed hollow cylinder, the hollow cylinder is filled with a phase-change fire-fighting material perfluorohexanone or freon, the terminal is vacuumized, and the vacuum degree is 3 × 10-1～10-4Pa. The bottom of the pole is sealed by fusible alloy 42, and the melting point of the fusible alloy is greater than or equal to 130 ℃.
Optionally, in the embodiment that this application provided, utmost point post 4 is sealed cavity cylinder, it has fire control material perfluor hexanone or phosphorus-containing flame retardant solution or foam extinguishing agent or gaseous fire extinguishing agent to fill in the cavity cylinder, and the utmost point post bottom is sealed through fusible alloy 42, and the melting point more than or equal to 130 ℃ of fusible alloy, utmost point post outer wall inlay soaking tube, utilize the heat pipe to further derive the heat of utmost point post 4.
When the battery works normally, the perfluorohexanone in the pole 4 is used as a phase-change heat transfer material to conduct the heat in the battery to the top end of the battery for heat dissipation;
before the battery is about to generate thermal runaway, the fusible metal at the bottom of the pole is melted at the high temperature of the battery, and the perfluorohexanone in the pole is released into the battery, so that the purpose of preventing or delaying the thermal runaway of the battery is achieved.
As shown in fig. 9, in the embodiment provided by the present application, the cover plate 2 is provided with a through hole 21 for injecting liquid or relieving pressure, and one through hole is designed to reduce the number of through holes formed in the battery cover plate, thereby ensuring the sealing performance of the battery.
Or the through hole for injecting and relieving pressure can also be arranged on the battery shell.
The through hole is also connected with a pressure relief pipe, and a pressure relief film or a spring type pressure valve is arranged between the pressure relief pipe and the through hole.
Further, in the embodiment provided by the present application, the battery charging device comprises a charging tube 211 disposed on the through hole 21 and used for charging the battery, and a pressure relief tube 212 with a pressure relief film 2121; after annotating liquid pipe 211 and annotating the liquid completion to the battery, demolish and annotate liquid pipe 211 and install pressure release pipe 212 on the through-hole 21 to reach a through-hole and realize annotating liquid and two purposes of pressure release.
Alternatively, in the embodiment provided in the present application, when a plurality of battery strings are used in parallel, the pressure relief pipe 212 may be connected in parallel by a pipe.
As shown in fig. 1 and 2, the cover plate 2 is provided with a post insulating sheet 22, and a cover post 23 disposed on the post insulating sheet 22, the cover post 23 includes a positive cover post and a negative cover post, wherein the cover post 23 is connected to the post 4.
As shown in fig. 1 to 9, in the embodiments provided in the present application, the assembly process of the present application is as follows:
firstly, combining 5 40Ah laminated cell cores into a 200Ah cell unit, and combining 15 cell units in total;
secondly, when the battery pack is manufactured, firstly, the cell unit is placed on a compression plate, then, a second compression plate is placed on the cell unit, the two compression plates are connected through 6 support rods, the cell unit is compressed and fixed, the cell unit is connected with the pole column, and finally, 15 cell units and 15 support frames are sequentially arranged in total by the method to form the battery pack;
thirdly, placing the battery pack into a battery shell, sealing the battery shell through a cover plate, arranging a pole insulating sheet at the position of the cover plate close to the pole, arranging a cover plate pole on the pole insulating sheet, and connecting the cover plate pole with the pole;
and fourthly, injecting liquid into the battery through the liquid injection pipe, removing the liquid injection pipe after liquid injection is completed, and replacing the liquid injection pipe with a pressure relief pipe to form a 3.2V 3000Ah large-capacity battery.
Although the embodiments of the present application have been disclosed above, they are not limited to the applications listed in the description and the embodiments. It can be applied in all kinds of fields suitable for the present application. Additional modifications will readily occur to those skilled in the art. Therefore, the application is not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (11)

1. A high-capacity lithium ion battery comprises a battery shell, a cover plate arranged on the battery shell, a cell group arranged in the shell and a pole connected with the cell group, wherein the pole extends out of the cover plate;
the battery cell unit and the support frame are arranged at intervals; the battery cell unit is connected with the pole, and the pole is placed in the groove of the support frame.
2. The high-capacity lithium ion battery as claimed in claim 1, wherein the support frame comprises compression plates for spacing the cell units, and adjustable support rods for connecting the compression plates.
3. A high capacity lithium ion battery according to claim 2, wherein the support rods are hollow structures, and the support rods can be connected in series.
4. A high capacity lithium ion battery according to claim 3, wherein said support frame is made of a thermally conductive material.
5. The high-capacity lithium ion battery as claimed in claim 1, wherein the electrode posts are sealed hollow cylinders, the hollow cylinders are filled with phase-change fire-fighting material perfluorohexanone or freon, the electrode posts are evacuated to a vacuum degree of 3 x 10- 1Pa to 3X 10-4Pa。
6. A high capacity lithium ion battery as claimed in claim 5, wherein the bottom of the post is sealed by a fusible alloy having a melting point of 130 ℃ or higher.
7. The high-capacity lithium ion battery as claimed in claim 1, wherein the terminal is a sealed hollow cylinder, the hollow cylinder is filled with fire-fighting material perfluorohexanone or phosphorus-containing fire retardant solution or foam extinguishing agent or gas extinguishing agent, the bottom of the terminal is sealed by fusible alloy, the melting point of the fusible alloy is not less than 130 ℃, and the outer wall of the terminal is embedded with a soaking tube.
8. A high capacity lithium ion battery as claimed in claim 1, wherein the cover plate is provided with a through hole for injecting liquid and releasing pressure, and the through hole can be externally connected with a pipe orifice for injecting liquid.
9. A high capacity lithium ion battery according to claim 8, wherein said through hole for charging and discharging is also provided in said battery case.
10. A large capacity lithium ion battery as claimed in claim 8, wherein said through hole is further connected with a pressure relief tube, and a pressure relief film or a spring type pressure valve is provided between said pressure relief tube and said through hole.
11. A large capacity lithium ion battery according to claim 10, wherein when a plurality of batteries are used in series, the pressure relief tube is connected in parallel by a pipe.
CN202110918808.8A 2021-08-11 2021-08-11 High-capacity lithium ion battery Pending CN113471579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110918808.8A CN113471579A (en) 2021-08-11 2021-08-11 High-capacity lithium ion battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110918808.8A CN113471579A (en) 2021-08-11 2021-08-11 High-capacity lithium ion battery

Publications (1)

Publication Number Publication Date
CN113471579A true CN113471579A (en) 2021-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110918808.8A Pending CN113471579A (en) 2021-08-11 2021-08-11 High-capacity lithium ion battery

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113991255A (en) * 2021-10-08 2022-01-28 陕西奥林波斯电力能源有限责任公司 High-capacity battery and assembling method thereof
CN114551962A (en) * 2021-12-31 2022-05-27 天津力神特种电源科技股份公司 High-capacity and high-safety battery structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113991255A (en) * 2021-10-08 2022-01-28 陕西奥林波斯电力能源有限责任公司 High-capacity battery and assembling method thereof
CN114551962A (en) * 2021-12-31 2022-05-27 天津力神特种电源科技股份公司 High-capacity and high-safety battery structure

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