CN210379299U - Overcharge-preventing battery of high-capacity ternary secondary battery - Google Patents
Overcharge-preventing battery of high-capacity ternary secondary battery Download PDFInfo
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- CN210379299U CN210379299U CN201921241788.XU CN201921241788U CN210379299U CN 210379299 U CN210379299 U CN 210379299U CN 201921241788 U CN201921241788 U CN 201921241788U CN 210379299 U CN210379299 U CN 210379299U
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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
- 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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- 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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Abstract
The utility model relates to a high-capacity ternary secondary battery overcharge-proof battery, which comprises an aluminum-plastic composite film shell, wherein a composite battery core is arranged in the aluminum-plastic composite film shell, electrolyte is sealed in an inner cavity of the aluminum-plastic composite film shell, the composite battery core is formed by winding a positive plate, a negative plate and diaphragm paper, the positive plate is provided with a positive tab, the negative plate is provided with a negative tab, and the diaphragm paper is positioned between the positive plate and the negative plate; the positive electrode lug adopts an aluminum lug as an exposed lug, and the negative electrode lug adopts a copper nickel-plated lug as an exposed lug. Anodal mixing single crystal ternary, under high voltage state, stable in structure, the gas production is little, and artificial graphite or mesophase carbon microsphere are chooseed for use to the negative pole, and artificial graphite and mesophase carbon microsphere, granule are less, and material layer interval is great, can accept Li +, can not make Li + pile up on the negative pole surface when heavy current charging, cause the negative pole to separate lithium, and the negative pole ear chooses for use copper nickel plating utmost point ear, effectively reduces the calorific capacity of battery when heavy current charging.
Description
Technical Field
The utility model belongs to the technical field of lithium ion secondary battery and specifically relates to a battery that overcharge is prevented to high capacity ternary secondary battery.
Background
In recent years, lithium ion secondary batteries are more and more widely applied, the safety performance of the lithium ion secondary batteries is more and more concerned by people, the lithium ion secondary batteries have frequent accidents such as liquid leakage, fire, combustion explosion and the like, particularly, the lithium ion secondary batteries cause overcharge and fire combustion due to improper use, and the problems are always more concerned in the battery industry, particularly, the battery cell with the capacity of 10000-15000mAh and the thickness of 10-13mm, and the soft package battery cell with the width of 50-60mm and the height of 90-110 mm. When 3C4.6V is overcharged, the current is too large and the voltage is high, causing the battery to heat up, the internal pressure to rise and the battery to ignite and burn.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a high-capacity ternary secondary battery anti-overcharging battery.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a high-capacity ternary secondary battery anti-overcharging battery comprises an aluminum-plastic composite film shell, wherein a composite battery core is arranged in the aluminum-plastic composite film shell, an electrolyte is sealed in an inner cavity of the aluminum-plastic composite film shell, the composite battery core is formed by winding a positive plate, a negative plate and diaphragm paper, the positive plate is provided with a positive tab, the negative plate is provided with a negative tab, and the diaphragm paper is positioned between the positive plate and the negative plate;
the positive electrode lug adopts an aluminum lug as an exposed lug, and the negative electrode lug adopts a copper nickel-plated lug as an exposed lug.
Furthermore, the outside of the aluminum-plastic composite film shell is provided with a battery core positive lug connected with the positive lug of the composite battery core, and the outside of the aluminum-plastic composite film shell is also provided with a battery core negative lug connected with the negative lug of the composite battery core.
Furthermore, gummed paper is pasted at the folding and rolling ending part of the composite battery core.
Further, a circle of semi-empty copper foil is pre-wound at the head of the negative plate on the winding structure of the composite battery core.
Further, the manufacturing method of the positive plate comprises the following steps: dissolving PVDF with NMP (N-methyl-2 pyrrolidone) to obtain a glue solution, adding CNT into the glue solution, dispersing at high speed, adding positive electrode active substance (monocrystal ternary: polycrystal ternary), vacuumizing, stirring for 4-6h, and making into slurry. And uniformly coating the slurry on an aluminum foil, and manufacturing a positive plate according to the type of the battery.
Further, the manufacturing method of the negative plate comprises the following steps: diluting and dissolving CMC (sodium carboxymethylcellulose) by using deionized water, stirring and dispersing, preparing into glue solution, adding a conductive agent s-p, stirring and dispersing, adding artificial graphite, stirring for 4-6h, adding SBR (polystyrene butadiene copolymer), preparing into slurry, uniformly coating the slurry on copper foil, and preparing into a negative plate according to the model of a battery.
Winding the prepared positive and negative plates and diaphragm paper into a naked composite battery core, packaging the battery core by an aluminum plastic film through a heat sealing process, then removing water in the battery through high-temperature vacuum baking, and then injecting electrolyte; and sealing the battery in vacuum to obtain the target battery.
The utility model has the advantages that: the positive plate of the battery selects the mixture of single crystal ternary and polycrystal ternary, the single crystal ternary material is primary crystal particles, the single particles are larger, the surface is coated with aluminum oxide, the power rate performance is good, under a high-voltage state, the material structure is stable, the gas production is small, the negative electrode uses artificial graphite or mesocarbon microbeads, the artificial graphite and the mesocarbon microbeads are smaller, the material interlayer is larger, the Li & lt + & gt can be rapidly accepted during high-current charging, the Li & lt + & gt cannot be accumulated on the surface of the negative electrode, lithium precipitation of the negative electrode is caused, the copper nickel-plated tab is selected as the negative electrode tab, the heat productivity of the battery during high-current charging can be effectively reduced, a circle of semi-empty part is pre-rolled at the head part of the negative electrode plate on a positive and negative electrode winding structure, the heat productivity of the battery during high-current charging.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the composite battery core before rolling and forming;
fig. 3 is a schematic structural view of the composite battery core of the present invention after molding;
fig. 4 is a schematic structural view of the positive plate of the present invention;
fig. 5 is a schematic structural view of the negative electrode sheet of the present invention.
Detailed Description
As shown in fig. 1 to 5, an overcharge-proof battery for a high-capacity ternary secondary battery comprises an aluminum-plastic composite film shell 100, a composite battery core 6 is arranged in the aluminum-plastic composite film shell 100, an electrolyte is sealed in an inner cavity of the aluminum-plastic composite film shell 100, the composite battery core 6 is formed by winding a positive plate 1, a negative plate 3 and a diaphragm paper 5, a circle of semi-empty copper foil is pre-wound at the head of the negative plate 3 on a winding structure of the composite battery core, the positive plate 1 is provided with a positive tab 2, the negative plate 3 is provided with a negative tab 4, and the diaphragm paper 5 is positioned between the positive plate 1 and the negative plate 3;
the positive electrode tab 2 adopts an aluminum tab as an exposed tab, and the negative electrode tab 4 adopts a copper nickel-plated tab as an exposed tab.
The outside of the aluminum-plastic composite film shell 100 is provided with a battery core positive lug 7 connected with the positive lug of the composite battery core 6, and the outside of the aluminum-plastic composite film shell 100 is also provided with a battery core negative lug 8 connected with the negative lug of the composite battery core. The adhesive paper 9 is pasted at the folding and rolling ending part of the composite battery core, and the stability of the rolling and forming of the composite battery core 6 is ensured through the adhesive paper 9.
In addition, the manufacturing method of the positive plate comprises the following steps: dissolving PVDF with NMP (N-methyl-2 pyrrolidone) to prepare a glue solution, adding CNT into the glue solution, dispersing at a high speed, adding a positive electrode active substance (a single crystal ternary substance and a polycrystalline ternary substance), vacuumizing, and stirring for 4-6h to prepare a slurry. And uniformly coating the slurry on an aluminum foil, and manufacturing a positive plate according to the type of the battery.
Further, the manufacturing method of the negative plate comprises the following steps: diluting and dissolving CMC (sodium carboxymethylcellulose) by using deionized water, stirring and dispersing, preparing into glue solution, adding a conductive agent s-p, stirring and dispersing, adding artificial graphite, stirring for 4-6h, adding SBR (polystyrene butadiene copolymer), preparing into slurry, uniformly coating the slurry on copper foil, and preparing into a negative plate according to the type of a battery.
Winding the prepared positive and negative plates and diaphragm paper into a naked composite battery core, packaging the battery core by an aluminum plastic film through a heat sealing process, then removing water in the battery through high-temperature vacuum baking, and then injecting electrolyte; and sealing the battery in vacuum to obtain the target battery.
Claims (3)
1. A high-capacity ternary secondary battery anti-overcharging battery comprises an aluminum-plastic composite film shell, wherein a composite battery core is arranged in the aluminum-plastic composite film shell, and an electrolyte is sealed in an inner cavity of the aluminum-plastic composite film shell; the positive electrode lug adopts an aluminum lug as an exposed lug, and the negative electrode lug adopts a copper nickel-plated lug as an exposed lug; and a circle of semi-empty copper foil is pre-wound at the head of the negative plate on the winding structure of the composite battery core.
2. The overcharge-proof battery of claim 1, wherein the aluminum-plastic composite film casing is provided with a positive tab of a battery cell at the outside thereof, and a negative tab of the battery cell at the outside thereof.
3. The overcharge-resistant battery of claim 1, wherein the composite battery core is pasted with adhesive paper at the folded and rolled end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921241788.XU CN210379299U (en) | 2019-08-02 | 2019-08-02 | Overcharge-preventing battery of high-capacity ternary secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921241788.XU CN210379299U (en) | 2019-08-02 | 2019-08-02 | Overcharge-preventing battery of high-capacity ternary secondary battery |
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| Publication Number | Publication Date |
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| CN210379299U true CN210379299U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921241788.XU Active CN210379299U (en) | 2019-08-02 | 2019-08-02 | Overcharge-preventing battery of high-capacity ternary secondary battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987286A (en) * | 2020-09-14 | 2020-11-24 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery comprising same |
| CN112786834A (en) * | 2021-01-26 | 2021-05-11 | 蜂巢能源科技有限公司 | Positive pole piece and lithium ion battery comprising same |
-
2019
- 2019-08-02 CN CN201921241788.XU patent/CN210379299U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987286A (en) * | 2020-09-14 | 2020-11-24 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery comprising same |
| CN112786834A (en) * | 2021-01-26 | 2021-05-11 | 蜂巢能源科技有限公司 | Positive pole piece and lithium ion battery comprising same |
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