CN114927839A - Plastic shell battery and large capacity battery composed of same - Google Patents
Plastic shell battery and large capacity battery composed of same Download PDFInfo
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- CN114927839A CN114927839A CN202210409227.6A CN202210409227A CN114927839A CN 114927839 A CN114927839 A CN 114927839A CN 202210409227 A CN202210409227 A CN 202210409227A CN 114927839 A CN114927839 A CN 114927839A
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- Prior art keywords
- battery
- opening
- electrolyte
- laminate polymer
- upper cover
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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
- H01M50/60—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
- H01M50/636—Closing or sealing filling ports, e.g. using lids
- H01M50/664—Temporary seals, e.g. for storage of instant batteries or seawater 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
- 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
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/121—Organic material
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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
- H01M50/131—Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
- H01M50/136—Flexibility or foldability
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
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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
- 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)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a mould shell battery and by its large capacity battery who makes, including at least one laminate polymer core, the casing and the upper cover subassembly that hold laminate polymer core, be equipped with positive negative pole post on the upper cover subassembly, let out and explode valve and electrically conductive connection piece, laminate polymer core just, the negative pole is connected through electrically conductive connection piece and upper cover subassembly just, negative pole post electricity, laminate polymer core arranges in casing inner chamber upper cover subassembly seal housing. Be equipped with the trompil on the laminate polymer battery core encapsulation bag, be equipped with the opening on the battery case, the opening part is equipped with dissolves the mechanism, dissolves the sealed opening of mechanism. When the opening is arranged in external electrolyte, the dissolving mechanism is dissolved in the electrolyte, the opening is opened, and the electrolyte enters the battery. According to the technical scheme, the liquid can be conveniently injected into the battery, the soft package batteries are enabled to be in a uniform electrolyte system, and the performance and the yield of the battery are improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a plastic shell soft package battery and a high-capacity battery composed of the same.
Background
The square battery with the maximum capacity of the lithium battery in the current market is 300Ah, 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 in energy storage application, 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.
The soft package battery has light weight, large capacity and flexible design, and is more and more applied in the current occasions. How to combine the laminate polymer battery into a large capacity battery, carry out the liquid injection operation to it, make it have stable battery performance and higher yield is the problem that needs to solve.
The patent CN111653722A discloses that when a soft package battery is placed in a sealed cavity for liquid injection, negative pressure needs to be pumped out from the sealed cavity, an electric core of the soft package battery absorbs electrolyte, and the negative pressure pumping is stopped after the negative pressure is maintained for a certain time; positive pressure is pumped into the sealing cavity, the battery core of the soft package battery absorbs electrolyte, and the positive pressure is kept for a plurality of time to stop pumping the positive pressure; and opening a negative pressure passage of the sealed cavity, taking out the soft package battery from the sealed cavity and placing the soft package battery in another sealed cavity after the pressure in the sealed cavity is recovered to normal pressure, repeating for a plurality of times, and finishing liquid injection after the absorption rate of the actually measured electrolyte is 100%. However, the method is complicated to operate and time-consuming and labor-consuming.
Disclosure of Invention
In view of the above, there is a need to provide a plastic-casing battery and a large-capacity battery composed of the same, so that a plurality of soft package batteries are in a uniform electrolyte system, and the battery performance and yield are improved.
The technical scheme of this patent is as follows:
a molded case battery, comprising: at least one laminate polymer core, hold laminate polymer core's casing and upper cover subassembly, be equipped with just, negative pole post on the upper cover subassembly, let out and explode valve and electrically conductive connection piece, laminate polymer core just, the negative pole passes through electrically conductive connection piece with the upper cover subassembly just, negative pole post electricity is connected, laminate polymer core arranges in the casing inner chamber, the upper cover subassembly is sealed the casing, be equipped with the trompil on the laminate polymer core encapsulation bag, be equipped with the opening on the battery case, the opening part is equipped with dissolves the mechanism, it is sealed to dissolve the mechanism the opening works as outside electrolyte is arranged in to the opening, dissolves the mechanism and dissolves electrolyte, the opening is opened, and inside electrolyte got into the battery.
Preferably, the dissolving mechanism includes a dissolving sheet, and the dissolving sheet is soluble in the electrolyte.
Preferably, the dissolving mechanism further comprises a spacer insoluble in the electrolyte, the spacer is coated on one surface of the dissolving sheet opposite to the opening of the shell, and the spacer covers the opening of the shell.
Preferably, the opening of the shell is provided with a butt joint pipe communicated with the inner cavity of the shell, and the dissolving mechanism is arranged in the butt joint pipe to seal the opening.
Preferably, the dissolving sheet is made of one or more of polymethyl methacrylate, silicon rubber, polyvinyl chloride, polycarbonate or ABS plastics.
Preferably, the dissolving sheet is made of polymethyl methacrylate, and the thickness of the dissolving sheet is less than 2 mm.
Preferably, the thickness of the spacer is less than 0.1 mm.
The utility model provides a large capacity battery, moulds shell battery and many branches liquid storage pipeline including two at least, many branches liquid storage pipeline include trunk line and branch pipe, there is the stock solution chamber in the trunk line to hold electrolyte, the branch pipe with mould shell battery opening one-to-one and connect, with realize electrolyte liquid storage pipeline with it communicates with each other to mould the shell battery.
Preferably, trunk line one end is equipped with notes liquid portion of bleeding, notes liquid portion of bleeding with stock solution chamber intercommunication, in order to right electrolyte stock solution pipeline evacuation or notes liquid.
Preferably, the liquid injection and air exhaust part is a control valve.
Compared with the prior art, the beneficial effects of this application are as follows:
this application is through carrying out the pre-charge partial volume back with single finished product laminate polymer battery core, picks out the better electric core of uniformity, with a plurality of laminate polymer battery core parallel connection and encapsulation in moulding the shell, set up dissolving mechanism on moulding the shell, when the battery is in natural state, the battery keeps apart with external, when moulding the shell battery with one or more and arrange external electrolyte in, dissolving mechanism opens, and electrolyte pours into the battery into, can realize annotating liquid and a plurality of batteries to the battery and be in unified electrolyte system.
Because the soft package battery cell in the plastic shell battery has better consistency, the manufactured plastic shell battery also has better yield, and the plastic shell battery is in a uniform electrolyte system, so that the problem of inconsistent battery performance caused by uneven electrolyte consumption in the use process of the battery is also reduced, the battery has good uniformity, and the service life and the stability of the battery are improved.
Meanwhile, the battery is simple in structure and high in applicability.
Drawings
Fig. 1 is a schematic connection diagram of a plurality of soft-packaged cells and an upper cover assembly;
fig. 2 is a schematic structural diagram of a single soft-package battery cell;
fig. 3 is a schematic view of the external structure of a molded case battery with an opening on the side of the case;
fig. 4 is a schematic view of the external structure of a molded case battery with an opening at the bottom of the case;
fig. 5 is a structural schematic view of a large capacity battery composed of a plastic case battery;
FIG. 6 is a schematic diagram of a liquid storage pipeline;
the reference numerals in the specification are as follows:
1-soft-package battery cell 2-upper cover component 3-explosion venting valve 4-soft-package battery cell anode 5-conductive connecting sheet
6-positive pole column 7-soft-package battery cell opening 8-negative pole column 9-soft-package battery cell negative pole
10-battery shell 11-shell opening 12-connecting pipe 13-dissolving mechanism 14-main pipeline of liquid storage pipeline
15-liquid storage pipeline branch pipe 16-plastic shell battery 17-liquid storage cabin 18-liquid injection and air exhaust part
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
Example 1
As shown in fig. 1-3, this embodiment provides a plastic shell battery, including a plurality of laminate polymer battery cores 1, be equipped with trompil 7 on the laminate polymer battery core, battery case 10, a plurality of laminate polymer battery cores have been held in the battery case, be equipped with anodal post 6 on the upper cover subassembly 2, negative pole post 8, let out and explode valve 3, conductive connection piece 5, laminate polymer battery core's positive pole 4, negative pole 9 passes through the guide point connection piece 5 and is connected with anodal post 6 and the negative pole post 8 of upper cover subassembly, laminate polymer battery core 1 arranges the inner chamber of casing 10 in, upper cover subassembly 2 sealed battery case 10, there is an opening 11 battery case 10 upper flank, the opening part is equipped with dissolving mechanism 13, in this embodiment, dissolving mechanism 13 is the polymethyl methacrylate piece that thickness is 2mm, polymethyl methacrylate piece can cover opening 11, and sealed the pasting in the opening part.
Before this moulded case battery of preparation, carry out the pre-charge partial volume with soft-packaged electrical core earlier, select the better soft-packaged electrical core of yield, carry out the trompil to soft-packaged electrical core's plastic-aluminum membrane, and with soft-packaged electrical core parallel connection, it moulds the shell battery to seal to make in moulding the shell, when battery natural state, the battery case inner chamber is kept apart with the external seal, place this in external electrolyte with this mould shell battery, or when the casing opening is connected the electrolyte pipeline, the polymethyl methacrylate piece 13 of casing opening part is dissolved the back by electrolyte, it is internal that electrolyte flows into the core shell through opening 11, because there is the opening on the soft-packaged electrical core plastic-aluminum membrane, electrolyte further flows into inside the soft-packaged electrical core, make a plurality of soft-packaged electrical core be in same electrolyte system.
In one embodiment, the dissolving mechanism comprises a 0.1mm thick polyethylene film and a 2mm thick sheet of polymethylmethacrylate, the polyethylene film covering the opening of the housing, the polyethylene film being attached to a side of the polymethylmethacrylate opposite the opening of the housing, the dissolving mechanism sealing the opening of the housing. When the battery is in a natural state, the inner cavity of the battery shell is sealed and isolated from the outside. When arranging this plastic shell battery in outside electrolyte, polymethyl methacrylate piece is dissolved the back by external electrolyte, under fluidic effect, and the polypropylene membrane drops from the opening, no longer seals the casing opening, and electrolyte passes through the opening and flows into electric core casing, because there is the opening on the laminate polymer electric core plastic-aluminum membrane, inside electrolyte further flows into laminate polymer electric core for a plurality of laminate polymer electric core are in same electrolyte system.
Example 2
As fig. 1, fig. 2 and fig. 4 show, this embodiment provides a mould shell battery, including a plurality of laminate polymer core 1, laminate polymer core is last to have trompil 7, battery housing 10, a plurality of laminate polymer core have been held in the battery housing, be equipped with anodal post 6 on the upper cover subassembly 2, negative pole post 8, let out and explode valve 3, conductive connection piece 5, laminate polymer core's positive pole 4, negative pole 9 is connected with anodal post 6 and negative pole post 8 of upper cover subassembly through conductive connection piece 5, 2 sealed battery housing 10 of upper cover subassembly, be equipped with an opening 11 on battery housing 10, the opening part is equipped with to the butt joint pipe 12, it is fixed with shell opening accessible bonding to butt joint pipe, butt joint pipe and battery housing inner chamber intercommunication, in this embodiment, it is 2.5mm polymethyl methacrylate piece for thickness to dissolve the mechanism, polymethyl methacrylate piece is fixed to bond in the butt joint pipe, and seal the opening.
Before this moulded case battery of preparation, carry out the pre-charge partial volume with the laminate polymer battery core earlier, select the better laminate polymer battery core of yield, carry out the trompil to the plastic-aluminum shell of laminate polymer battery core, with laminate polymer battery core parallel connection, seal and make in moulding the shell and mould the shell battery. When the battery is in a natural state, the inner cavity of the battery shell is isolated from the external seal, when the plastic shell battery is placed in external electrolyte, the polymethyl methacrylate sheet is dissolved by the external electrolyte, the electrolyte flows into the battery core shell through the opening, and the electrolyte further flows into the soft package battery core inside the soft package battery core due to the opening in the aluminum plastic film of the soft package battery core, so that the soft package battery cores are in the same electrolyte system.
In one embodiment, the dissolving mechanism comprises a polyethylene film with the thickness of 0.1mm and a polymethyl methacrylate sheet with the thickness of 2mm, the polyethylene film can cover the opening of the shell, the polyethylene film is attached to one surface of the polymethyl methacrylate sheet, a connecting pipe is bonded at the opening of the shell, the connecting pipe is communicated with the inner cavity of the shell, the dissolving mechanism is fixedly connected onto the connecting pipe, the surface, which is attached with the polyethylene film, of the polymethyl methacrylate is opposite to the inside of the shell, and the dissolving mechanism arranged on the connecting pipe seals the opening of the shell. When the battery is in a natural state, the inner cavity of the battery shell is sealed and isolated from the outside. When arranging this plastic-shell battery in outside electrolyte, the polymethyl methacrylate piece is dissolved the back by external electrolyte, and under the effect of electrolyte fluid, the polyethylene membrane drops, no longer seals the casing opening, and the battery is inside to link up with the outside, and electrolyte flows into electric core casing through the opening, because there is the opening on the soft-package cell aluminium-plastic film, inside electrolyte further flowed into soft-package cell for a plurality of soft-package cell are in same electrolyte system.
Example 3
As shown in fig. 5 and fig. 6, the present embodiment provides a large capacity battery, which includes a plurality of plastic-shell batteries 16 and a plurality of branch liquid storage pipelines, the plurality of branch liquid storage pipelines includes a main pipeline 14 and a plurality of branch pipes 15, a liquid storage compartment 17 is provided in the main pipeline 14, electrolyte is contained in the liquid storage compartment 17, the branch pipes 15 are connected with openings 11 of the plastic-shell batteries in a one-to-one correspondence manner, a dissolving mechanism is provided on the opening 11 of the housing, the dissolving mechanism in the present embodiment is a polymethyl methacrylate sheet with a thickness of 2mm, and is hermetically bonded to the battery opening 11, when electrolyte is injected into the liquid storage pipeline, the electrolyte enters each plastic-shell battery through the main pipeline 14 and the branch pipes 15, since there is a polymethyl methacrylate dissolving sheet at the opening of the plastic-shell battery, after the dissolving sheet is dissolved and disappeared by the electrolyte, the electrolyte in the pipeline is communicated with the plastic-shell battery, the electrolyte enters the plastic-shell battery, and then enters inside each soft package battery core, because the liquid storage cavity 17 contains electrolyte, the plastic shell battery with the soft package battery cell and the liquid storage cavity are both in a common electrolyte system, the problem of battery performance difference caused by inconsistent electrolyte consumption is reduced in the use process of the battery, and the high-capacity battery has good uniformity.
Because the soft-packaged battery cell in the plastic shell battery is packaged in the battery shell after being subjected to component capacity and consistency selection, the whole large-capacity battery also has good consistency.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A molded case battery, comprising: at least one laminate polymer core, hold laminate polymer core's casing and upper cover subassembly, be equipped with just, negative pole post on the upper cover subassembly, let out and explode valve and electrically conductive connection piece, laminate polymer core just, the negative pole passes through electrically conductive connection piece with the upper cover subassembly just, negative pole post electricity is connected, laminate polymer core arranges in the casing inner chamber, the upper cover subassembly is sealed the casing, be equipped with the trompil on the laminate polymer core encapsulation bag, be equipped with the opening on the battery case, the opening part is equipped with dissolves the mechanism, it is sealed to dissolve the mechanism the opening works as outside electrolyte is arranged in to the opening, it dissolves the mechanism in electrolyte, the opening is opened, inside electrolyte gets into the battery.
2. A molded case battery as defined in claim 1, wherein the dissolving mechanism includes a dissolving tablet, the dissolving tablet being soluble in the electrolyte.
3. A molded case battery as defined in claim 2, wherein the dissolving mechanism further includes a separator insoluble in the electrolyte, the separator covering a side of the dissolving sheet opposite to the case opening, the separator covering the case opening.
4. A molded case battery as defined in claim 2 or 3 wherein the opening of the case is provided with a docking tube communicating with the inner cavity of the case, and the dissolution mechanism is disposed in the docking tube to seal the opening.
5. A molded case battery as defined in claim 2, wherein the dissolving sheet is made of one or more of polymethylmethacrylate, silicone rubber, polyvinylchloride, polycarbonate, or ABS plastic.
6. A molded case battery as defined in claim 2, wherein the dissolving sheet is made of polymethyl methacrylate, and the dissolving sheet has a thickness of less than 2 mm.
7. The molded case battery of claim 3, the spacer having a thickness of less than 0.1 mm.
8. A large capacity battery, comprising at least two plastic-shell batteries according to any one of claims 1 to 7 and a multi-branch liquid storage pipeline, wherein the multi-branch liquid storage pipeline comprises a main pipeline and branch pipes, a liquid storage cavity is formed in the main pipeline to contain electrolyte, and the branch pipes are connected with the openings of the plastic-shell batteries in a one-to-one correspondence manner to realize that the electrolyte liquid storage pipeline is communicated with the plastic-shell batteries.
9. A large capacity battery as defined in claim 8, wherein said main pipe is provided at one end thereof with a liquid-filling and air-extracting portion communicating with said reservoir chamber for evacuating or filling said electrolyte reservoir pipe.
10. A large capacity battery as defined in claim 9, wherein said liquid injection and air extraction portion is a control valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210409227.6A CN114927839A (en) | 2022-04-19 | 2022-04-19 | Plastic shell battery and large capacity battery composed of same |
| PCT/CN2023/084370 WO2023185830A1 (en) | 2022-03-30 | 2023-03-28 | Battery housing, cell, and high-capacity battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210409227.6A CN114927839A (en) | 2022-04-19 | 2022-04-19 | Plastic shell battery and large capacity battery composed of same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114927839A true CN114927839A (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210409227.6A Pending CN114927839A (en) | 2022-03-30 | 2022-04-19 | Plastic shell battery and large capacity battery composed of same |
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| CN (1) | CN114927839A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023185830A1 (en) * | 2022-03-30 | 2023-10-05 | 陕西奥林波斯电力能源有限责任公司 | Battery housing, cell, and high-capacity battery |
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2022
- 2022-04-19 CN CN202210409227.6A patent/CN114927839A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023185830A1 (en) * | 2022-03-30 | 2023-10-05 | 陕西奥林波斯电力能源有限责任公司 | Battery housing, cell, and high-capacity battery |
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