CN219811533U - Lithium ion battery capable of increasing inner reserved space and preventing explosion by pressure - Google Patents
Lithium ion battery capable of increasing inner reserved space and preventing explosion by pressure Download PDFInfo
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- CN219811533U CN219811533U CN202321079213.9U CN202321079213U CN219811533U CN 219811533 U CN219811533 U CN 219811533U CN 202321079213 U CN202321079213 U CN 202321079213U CN 219811533 U CN219811533 U CN 219811533U
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- lithium ion
- ion battery
- explosion
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 42
- 238000004880 explosion Methods 0.000 title abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 64
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000002985 plastic film Substances 0.000 claims abstract description 45
- 229920006255 plastic film Polymers 0.000 claims abstract description 45
- 210000005056 cell body Anatomy 0.000 claims abstract description 25
- 239000011888 foil Substances 0.000 claims description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 claims description 6
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical group [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 6
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 6
- 239000004005 microsphere Substances 0.000 claims description 6
- 229910021382 natural graphite Inorganic materials 0.000 claims description 6
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 239000007774 positive electrode material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 3
- 239000007788 liquid Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 239000003792 electrolyte Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 6
- 210000004027 cell Anatomy 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a lithium ion battery capable of increasing an inner reserved space and preventing explosion by pressure, which comprises a battery cell body and an aluminum plastic film shell, wherein the battery cell body is packaged in the aluminum plastic film shell, the battery cell body comprises a positive plate, a negative plate and a diaphragm, an inner reserved space is formed between the battery cell body and the aluminum plastic film shell, the width of the inner reserved space is the width of a female die, the height of the inner reserved space is the height of the female die of the aluminum plastic film, the height of the female die is equal to +0.2mm, and the width of the female die is equal to +0.2mm. The lithium ion battery provided by the utility model has the characteristics of providing a discharge channel for gas or liquid generated by internal reaction, preventing battery explosion, improving displacement, being good in quality stability and convenient to process.
Description
Technical Field
The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery capable of increasing an inner reserved space and preventing explosion.
Background
Energy-saving and new energy automobiles such as hybrid electric vehicles, pure electric vehicles, fuel cell vehicles and the like become a better development path. However, the rapid development of new energy automobiles is greatly limited by safety and reliability, service life, driving range, cost, public supporting facilities and the like, and the technical breakthrough and large-scale application of power batteries are particularly critical. However, in the process of process design and manufacturing of the conventional lithium battery, the height of a die of an aluminum plastic shell which is generally designed is consistent with the width of a diaphragm of a battery core body, and a reserved space in the die is not designed to serve as a gas or liquid discharge channel, so that the aluminum plastic shell is just attached to a winding core, and the winding core can be prevented from shifting. However, because the assembled aluminum-plastic shell is fully attached to the battery cell body in height, the R angle is added at the tail part to fix the battery cell body, so that the top and the bottom of the battery are in a closed state, and gas generated after the manufacturing procedures of liquid injection, formation and the like cannot be smoothly discharged to the air bag, so that the battery tab glue is easily flushed and exploded under the action of formation air pressure, the abnormal problems of poor appearance, liquid leakage and the like of the battery are caused, and the production efficiency of the lithium ion battery is influenced; in addition, because a certain gap is not provided for the residual electrolyte to provide a circulation channel, the liquid cannot be smoothly discharged to the external environment in the working procedures of two-seal air extraction and the like, and the electrolyte remained in the battery is extremely easy to generate side effects in the later use of the battery, so that the battery has poor appearance, gas expansion, influences on various performances, safety problems, yield reduction and the like of the battery, such as the cycle life and the like.
Disclosure of Invention
The utility model aims to provide a lithium ion battery capable of increasing the inner reserved space to prevent explosion, and the lithium ion battery has the characteristics of good explosion-proof effect, good displacement-proof effect, high quality stability and convenient processing.
The utility model can be realized by the following technical scheme:
the utility model discloses a battery cell body and an aluminum plastic film shell, wherein the battery cell body is packaged in the aluminum plastic film shell, the battery cell body comprises a positive plate, a negative plate and a diaphragm, an inner reserved space is formed between the battery cell body and the aluminum plastic film shell, the width of the inner reserved space is the width of a female die, the height of the inner reserved space is the height of the female die of the aluminum plastic film, the height of the female die is equal to +0.2mm of the height of the diaphragm, and the width of the female die is equal to +0.2mm of the width of the diaphragm.
Further, the positive plate, the negative plate and the diaphragm are mutually wound or laminated at intervals, and the diaphragm is arranged between the positive plate and the negative plate.
Further, the negative electrode sheet width is greater than the positive electrode sheet width, and the separator width is greater than the negative electrode sheet width.
Further, the positive active material of the positive plate is lithium manganate, lithium iron phosphate, ternary nickel cobalt lithium manganate and/or lithium cobaltate.
Further, the negative electrode active material of the negative electrode plate is natural graphite, artificial graphite or mesophase carbon microsphere.
Further, the diaphragm body is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm.
Further, the current collector of the positive plate is aluminum foil, and the current collector of the negative plate is copper foil.
Further, the inside of the female die of the aluminum plastic film shell is provided with a round corner in a smooth transition mode.
Further, the aluminum plastic film housing comprises an aluminum foil layer, an OPP layer and an MPP layer for bonding the aluminum foil layer and the OPP layer.
Further, the aluminum-plastic film shell is formed by dry pressing or thermal pressing.
The utility model discloses a lithium ion battery capable of increasing an inner reserved space and preventing explosion, which has the following beneficial effects:
compared with the lithium ion battery in which the height of a female die is equal to that of a diaphragm in the prior art, the internal reserved space is not used as an exhaust or liquid discharge channel, so that gas remains in the battery to be flushed and exploded, and the lithium ion battery has the advantages that compared with the lithium ion battery without the reserved space, the lithium ion battery in which gas or redundant electrolyte generated by internal reaction of the lithium ion battery without the reserved space can be discharged to the external environment through the reserved channel, and the explosion prevention effect is very good; through the test, the lithium ion battery provided by the utility model has lower battery expansion rate compared with the lithium ion battery without a reserved space.
Secondly, the lithium ion battery has good anti-displacement effect, the height of the female die of the lithium ion battery is increased by 0.2mm to form a reserved channel, and after the procedures of two vacuum air extraction and the like, the battery core body is packaged in the aluminum plastic film shell;
thirdly, the quality stability is high, the lithium ion battery is disassembled by disassembling, redundant electrolyte is remained in the battery shell of the lithium ion battery without a reserved space in the prior art, and redundant electrolyte is not remained in the lithium ion battery with a reserved channel with the height of 0.2mm increased by the female die; and the appearance of the pole piece is normal.
Fourth, the utility model is convenient to process, through the high design of the size concave die of the battery shell, directly use the existing cell design, use the ready-made shell punching equipment to punch the shell and shape, do not need to set up the extra fixed structure, have reduced the difficulty of encapsulation and design limitedly, has promoted the convenience of processing.
Drawings
Fig. 1 is a schematic diagram of the internal structure of a lithium ion battery for increasing the internal reserved space and preventing explosion;
fig. 2 is a schematic diagram showing the internal dimensions of a lithium ion battery for increasing the internal headspace and preventing explosion;
fig. 3 is a side view of a lithium ion battery for increasing the internal reserved space and preventing explosion;
the labels in the drawings include:
110: an aluminum plastic film shell;
120: a cell body;
130: a tab;
h: a battery height;
t: the thickness of the battery;
w: a cell width;
w': the center distance of the pole lugs;
d: tab width;
l1: the leakage length of the tab adhesive;
l2: the exposed length of the tab (containing tab glue);
l3: top seal height;
l4: a diaphragm width;
a: the inner roof leaves a space gap.
Detailed Description
In order to better understand the technical solution of the present utility model, the following describes the product of the present utility model in further detail with reference to examples.
As shown in fig. 1, the utility model discloses a battery cell which comprises a battery cell body 120 and an aluminum plastic film shell 110, wherein the battery cell body 120 is packaged in the aluminum plastic film shell 110, the battery cell body 120 comprises a positive plate, a negative plate and a diaphragm, an inner reserved space is formed between the battery cell body 120 and the aluminum plastic film shell 110, the width of the inner reserved space is the width of a female die, the height of the inner reserved space is the height of the female die of the aluminum plastic film, the height of the female die is equal to +0.2mm of the diaphragm, namely L4+a, wherein a takes a value of 0.2mm; the width of the die is equal to the width of the diaphragm +0.2mm, i.e. the height H of the battery is at least equal to the height of the diaphragm + the thickness of the aluminium-plastic film + 2+0.2mm, i.e. the top sealing height L3 is equal to the height of the diaphragm +0.2mm.
Further, the positive plate, the negative plate and the diaphragm are mutually wound or laminated at intervals, and the diaphragm is arranged between the positive plate and the negative plate.
Further, the negative electrode sheet width is greater than the positive electrode sheet width, and the separator width is greater than the negative electrode sheet width.
Further, the positive active material of the positive plate is lithium manganate, lithium iron phosphate, ternary nickel cobalt lithium manganate and/or lithium cobaltate.
Further, the negative electrode active material of the negative electrode plate is natural graphite, artificial graphite or mesophase carbon microsphere.
Further, the diaphragm body is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm.
Further, the current collector of the positive plate is aluminum foil, and the current collector of the negative plate is copper foil.
Further, the inside of the female die of the aluminum plastic film shell is provided with a round corner in a smooth transition mode.
Further, the aluminum plastic film housing comprises an aluminum foil layer, an OPP layer and an MPP layer for bonding the aluminum foil layer and the OPP layer.
Further, the aluminum-plastic film shell is formed by dry pressing or thermal pressing.
The utility model relates to a lithium ion battery capable of increasing an inner reserved space and preventing explosion, wherein the inner reserved space comprises an inner dimension of an aluminum plastic film shell, the inner dimension of the aluminum plastic film shell comprises a width of a female die and a height of the female die, the height of the female die is equal to the height of a diaphragm plus 0.2mm, an R angle for fixing a battery core body is arranged at the bottom of the battery during packaging, a battery core is fixed in a battery shell, the battery core consists of a positive plate, a negative plate and a diaphragm, and electrolyte is filled in the battery shell; the battery shell is externally fixed with a positive electrode lug and a negative electrode lug. The utility model has good explosion prevention and displacement change effects, the internal reserved passage can smoothly discharge gas or residual liquid generated in the lithium ion battery to the air bag, and the gas or residual liquid is discharged to the external environment from the reserved passage through two air extraction procedures, thereby ensuring the appearance of the lithium ion battery, ensuring the electrical performance problems in various aspects such as cycle life and the like; in addition, the structure has simple setting procedure, normal encapsulation and easy operation in practical application.
Example 1
The utility model discloses a lithium ion battery capable of increasing an inner reserved space and preventing explosion by pressure, which comprises a battery cell body and an aluminum plastic film shell, wherein the battery cell body is packaged in the aluminum plastic film shell, the battery cell body comprises a positive plate, a negative plate and a diaphragm, the inner reserved space comprises the inner dimension of the aluminum plastic film shell, the inner dimension of the aluminum plastic film shell comprises a female die width and a female die height, and the female die height is equal to the diaphragm height +0.2mm.
In this embodiment, the inner space comprises an inner dimension of the plastic-aluminum film housing, the inner dimension of the plastic-aluminum film housing comprises a die width and a die height, and the die height is equal to +0.2mm of the diaphragm height. The positive plate, the negative plate and the diaphragm are mutually wound or laminated at intervals, and the diaphragm is arranged between the positive plate and the negative plate. The width of the negative electrode plate is larger than that of the positive electrode plate, and the width of the diaphragm is larger than that of the negative electrode plate. The positive active material of the positive plate is lithium manganate, lithium iron phosphate, ternary nickel cobalt lithium manganate and/or lithium cobaltate. The negative electrode active material of the negative electrode plate is natural graphite, artificial graphite and mesophase carbon microspheres. The diaphragm body is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm. The current collector of the positive plate is aluminum foil, and the current collector of the negative plate is copper foil.
Further, the inner reserved space comprises an inner dimension of an aluminum plastic film shell, and the inner dimension of the aluminum plastic film shell comprises a width of a female die and a height of the female die.
Further, the die height is equal to the diaphragm height +0.2mm.
Example 2
The utility model discloses a lithium ion battery capable of increasing an inner reserved space and preventing explosion by pressure, which comprises a battery cell body and an aluminum plastic film shell, wherein the battery cell body is packaged in the aluminum plastic film shell, the battery cell body comprises a positive plate, a negative plate and a diaphragm, the inner reserved space comprises the inner dimension of the aluminum plastic film shell, the inner dimension of the aluminum plastic film shell comprises a female die width and a female die height, and the female die height is equal to the diaphragm height +0.2mm.
In this embodiment, the inner space comprises an inner dimension of the plastic-aluminum film housing, the inner dimension of the plastic-aluminum film housing comprises a die width and a die height, and the die height is equal to +0.2mm of the diaphragm height. The positive plate, the negative plate and the diaphragm are mutually wound or laminated at intervals, and the diaphragm is arranged between the positive plate and the negative plate. The width of the negative electrode plate is larger than that of the positive electrode plate, and the width of the diaphragm is larger than that of the negative electrode plate. The positive active material of the positive plate is lithium manganate, lithium iron phosphate, ternary nickel cobalt lithium manganate and/or lithium cobaltate. The negative electrode active material of the negative electrode plate is natural graphite, artificial graphite and mesophase carbon microspheres. The diaphragm body is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm. The current collector of the positive plate is aluminum foil, and the current collector of the negative plate is copper foil. The inner reserved space comprises an inner dimension of an aluminum plastic film shell, the inner dimension of the aluminum plastic film shell comprises a female die width and a female die height, and the female die height is equal to the height of the diaphragm plus 0.2mm.
Example 3
The utility model discloses a lithium ion battery capable of increasing an inner reserved space and preventing explosion by pressure, which comprises a battery cell body and an aluminum plastic film shell, wherein the battery cell body is packaged in the aluminum plastic film shell, the battery cell body comprises a positive plate, a negative plate and a diaphragm, the inner reserved space comprises the inner dimension of the aluminum plastic film shell, the inner dimension of the aluminum plastic film shell comprises a female die width and a female die height, and the female die height is equal to the diaphragm height +0.2mm.
In this embodiment, the inner space comprises an inner dimension of the plastic-aluminum film housing, the inner dimension of the plastic-aluminum film housing comprises a die width and a die height, and the die height is equal to +0.2mm of the diaphragm height. The positive plate, the negative plate and the diaphragm are mutually wound or laminated at intervals, and the diaphragm is arranged between the positive plate and the negative plate. The width of the negative electrode plate is larger than that of the positive electrode plate, and the width of the diaphragm is larger than that of the negative electrode plate. The positive active material of the positive plate is lithium manganate, lithium iron phosphate, ternary nickel cobalt lithium manganate and/or lithium cobaltate. The negative electrode active material of the negative electrode plate is natural graphite, artificial graphite and mesophase carbon microspheres. The diaphragm body is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm. The current collector of the positive plate is aluminum foil, and the current collector of the negative plate is copper foil. The inner reserved space comprises an inner dimension of an aluminum plastic film shell, the inner dimension of the aluminum plastic film shell comprises a female die width and a female die height, and the female die height is equal to the height of the diaphragm plus 0.2mm.
Comparative example 1
The only difference between comparative example 1 and example 1 is that there is no empty space at the height of the die.
Comparative example 2
Comparative example 2 uses a die height equal to the diaphragm height +0.5mm.
In order to evaluate the technical effects of the present utility model, the anti-explosion and anti-displacement effects of example 1, comparative example 1 and comparative example 2 were compared, and specific results are as follows:
in terms of explosion-proof effect, when the lithium ion battery with a reserved channel is not increased in comparative example 1, the battery tab glue is easy to be exploded (the tab is exploded to cause liquid leakage during the formation of comparative example 1, and the battery expands during the formation of comparative example 1), so that the production efficiency of the battery is reduced; in addition, when the secondary sealing is performed through the working procedures such as air extraction, the redundant electrolyte cannot be smoothly discharged, and the residual electrolyte is easy to generate side reaction to generate gas so as to cause the expansion of the battery, thereby influencing the appearance, the performance, the cycle life and the like of the battery. The reserved space of the embodiment 1 and the comparative example 2 is that gas or redundant electrolyte possibly generated by side reaction of electrolyte in the battery is discharged to an air bag or an external environment (the battery is normal in the formation of the embodiment 1) through providing a reserved channel, the explosion-proof effect of the battery is very good, the battery is free from phenomena of displacement of a battery core, explosion of tab glue and the like after formation, the appearance of the battery after secondary sealing is smooth, the swelling and softening phenomena of the battery are avoided, and all performances and the cycle life of the battery are normal.
As for the battery energy density, the battery energy density of the soft pack lithium ion battery of example 1 was increased by 0.2mm without change, the battery energy density of the battery without inner space was not changed in comparative example 1, and the battery energy density of the battery was decreased by 0.5mm with increase of the battery of comparative example 2.
The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way; those skilled in the art will readily appreciate that the present utility model is well adapted to carry out the ends of the same out as described herein; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present utility model are possible in light of the above teachings without departing from the scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.
Claims (9)
1. The utility model provides an increase interior headspace explosion-proof lithium ion battery, includes electric core body and plastic-aluminum membrane shell, electric core body encapsulation is in inside the plastic-aluminum membrane shell, electric core body includes positive plate, negative plate and diaphragm, its characterized in that: an inner reserved space is formed between the battery cell body and the aluminum plastic film shell, the width of the inner reserved space is the width of the female die, the height of the inner reserved space is the height of the female die of the aluminum plastic film, the height of the female die is equal to the height of the diaphragm plus 0.2mm, and the width of the female die is equal to the width of the diaphragm plus 0.2mm.
2. The increased internal headspace explosion-proof lithium ion battery of claim 1, wherein: the width of the negative electrode plate is larger than that of the positive electrode plate, and the width of the diaphragm is larger than that of the negative electrode plate.
3. The increased internal headspace explosion-proof lithium ion battery of claim 2, wherein: the positive electrode active material of the positive electrode plate is lithium manganate, lithium iron phosphate, ternary nickel cobalt lithium manganate and/or lithium cobaltate.
4. The increased internal headspace explosion-proof lithium ion battery of claim 3, wherein: the negative electrode active material of the negative electrode plate is natural graphite, artificial graphite or mesophase carbon microsphere.
5. The increased internal headspace explosion-proof lithium ion battery of claim 4, wherein: the diaphragm body is a PE diaphragm, a PP diaphragm or a PE/PP composite diaphragm.
6. The increased internal headspace explosion-proof lithium ion battery of claim 5, wherein: the current collector of the positive plate is aluminum foil, and the current collector of the negative plate is copper foil.
7. The increased internal headspace explosion-proof lithium ion battery of claim 6, wherein: the inside of die of plastic-aluminum membrane shell is fillet smooth transition setting.
8. The increased internal headspace explosion-proof lithium ion battery of claim 7, wherein: the aluminum plastic film housing comprises an aluminum foil layer, an OPP layer and an MPP layer for bonding the aluminum foil layer and the OPP layer.
9. The increased internal headspace explosion-proof lithium ion battery of claim 8 or claim 7, wherein: the aluminum-plastic film shell is formed by dry pressing or thermal pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321079213.9U CN219811533U (en) | 2023-05-08 | 2023-05-08 | Lithium ion battery capable of increasing inner reserved space and preventing explosion by pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321079213.9U CN219811533U (en) | 2023-05-08 | 2023-05-08 | Lithium ion battery capable of increasing inner reserved space and preventing explosion by pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219811533U true CN219811533U (en) | 2023-10-10 |
Family
ID=88216094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321079213.9U Active CN219811533U (en) | 2023-05-08 | 2023-05-08 | Lithium ion battery capable of increasing inner reserved space and preventing explosion by pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219811533U (en) |
-
2023
- 2023-05-08 CN CN202321079213.9U patent/CN219811533U/en active Active
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