CN216671801U - Power battery cell and lithium battery comprising same - Google Patents
Power battery cell and lithium battery comprising same Download PDFInfo
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- CN216671801U CN216671801U CN202122751448.5U CN202122751448U CN216671801U CN 216671801 U CN216671801 U CN 216671801U CN 202122751448 U CN202122751448 U CN 202122751448U CN 216671801 U CN216671801 U CN 216671801U
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- bottom butt
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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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Abstract
The utility model discloses a power battery cell and a lithium battery comprising the same, and the power battery cell comprises a cell main body and a first battery isolating membrane, wherein the first battery isolating membrane surrounds the outside of the cell main body to protect the cell main body, the lower end of the first battery isolating membrane extends out of the lower part of the cell main body, a bottom butt joint block is arranged below the cell main body, the bottom butt joint block is bonded with the cell main body, the bottom butt joint block is arranged on the inner side of the first battery isolating membrane, a second battery isolating membrane is arranged on the outer side of the bottom butt joint block, and the second battery isolating membrane covers the outer side of the bottom butt joint block. This power battery electricity core and the lithium cell that contains this electricity core protect the electric core main part outside through the setting of first battery barrier film and second battery barrier film, compare mylar and have better protection effect, and the inflation of the first gasbag of second battery barrier film accessible and the extension of first battery barrier film keep inseparable laminating.
Description
Technical Field
The utility model relates to the technical field of power battery cells, in particular to a power battery cell and a lithium battery comprising the same.
Background
The power battery electric core is the main energy storage equipment of its battery, and the quality of its electric core has decided the quality of battery, and the power battery can be used as new energy automobile's energy memory, and its inside electric core exports the electric quantity through utmost point ear, but current power battery electric core still has some weak points when using:
the battery core is generally protected through mylar (tough polyester polymer) outside the existing power battery core, the corrosion resistance and the mechanical strength of the mylar cannot meet the use requirements for some power batteries with higher requirements, the electrolyte in the battery core is easy to corrode an external shell after being leaked, and more gaps are easy to appear at the connection part of the bottom and the side of the battery when the external protection is arranged, so that the leakage risk of the battery is increased.
In order to solve the problems, innovative design is urgently needed on the basis of the original power battery core.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power battery cell and a lithium battery comprising the same, and aims to solve the problems that the battery cell is generally protected by mylar (tough polyester polymer) outside the existing power battery cell in the market in the background art, the corrosion resistance and the mechanical strength of the mylar cannot meet the use requirements for some power batteries with higher requirements, and the external shell is easily corroded after electrolyte in the battery cell leaks, so that the risk of battery leakage is increased.
In order to achieve the purpose, the utility model provides the following technical scheme: a power battery cell comprises a cell main body and a first battery isolating membrane, wherein the first battery isolating membrane surrounds the outer side of the cell main body to provide protection for the cell main body, the lower end of the first battery isolating membrane extends out of the lower part of the cell main body, a bottom butt joint block is arranged below the cell main body, the bottom butt joint block is bonded with the cell main body and is arranged on the inner side of the first battery isolating membrane, a second battery isolating membrane is arranged on the outer side of the bottom butt joint block and is covered on the outer side of the bottom butt joint block and is used for being in butt joint with the first battery isolating membrane to seal the bottom of the cell main body, a first air bag is arranged on the outer side of the bottom butt joint block in a surrounding mode, the inner side of the first air bag is connected with a communicating pipe, the inner end of the communicating pipe is connected with a second air bag, and the second air bag is arranged inside the bottom butt joint block through a containing cavity, and the inner space of the second air bag is communicated with the inner space of the first air bag through the communicating pipe, a pressing block is arranged below the second air bag, the lower end of the pressing block penetrates through the lower surface of the bottom butt joint block, and the pressing block can extrude the second air bag to deform the second air bag after being pressed.
Further optimize this technical scheme, the last fixed surface of bottom butt joint piece has the bonding board, and the bottom butt joint piece is connected through bonding board and electric core main part, installs the bottom butt joint piece in the below of electric core main part.
Further optimizing the technical scheme, the extension length of the lower end of the first battery isolation film is equal to the height of the bottom butt joint block, and the lowest point of the second battery isolation film on the bottom butt joint block, which hangs down, is positioned below the lowest point of the first air bag, so that the subsequent second battery isolation film can be effectively attached to the first battery isolation film.
Further optimize this technical scheme, the briquetting is "T" shape structural design, and constitutes sliding construction from top to bottom between briquetting and the bottom butt joint piece, makes the briquetting can block in the inside that holds the chamber, avoids the briquetting to take place to drop.
Further optimize this technical scheme, the inside of briquetting is provided with the stopper, and stopper horizontal installation to the stopper passes through to constitute between reset spring and the briquetting and controls extending structure, and the stopper removes to hold the intracavity and can stretch out under reset spring's effect and carry on spacingly to the briquetting, avoids follow-up briquetting to appear kick-back phenomenon.
The utility model provides a lithium battery, includes electric core, shell body and protection circuit board, the shell body sets up and provides the protection for it in the electric core outside, and the electrode and the protection circuit board of electric core are connected, electric core is foretell battery electricity core, the butt joint groove has been seted up to the inside of shell body, and constitutes unsmooth cooperation structure between butt joint groove and the electric core, can extend the lower extreme of first battery barrier film through the butt joint groove and carry out outside spacing, makes follow-up second battery barrier film can keep inseparable laminating rather than.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the power battery cell and the lithium battery comprising the power battery cell protect the outer side of the cell main body through the arrangement of the first battery isolating membrane and the second battery isolating membrane, compared with mylar, the power battery cell has a better protection effect, and the second battery isolating membrane can be tightly attached to the extension of the first battery isolating membrane through the expansion of the first air bag, so that the overall protection and leakage prevention effects on the cell main body are improved;
(2) this power battery electricity core and the lithium cell that contains this electricity core can carry on spacingly to the extension section of first battery barrier film through the inside butt joint groove that sets up of shell body, and cooperation bottom butt joint piece can be erect it, makes the outside of follow-up first battery barrier film obtain effectual support.
Drawings
Fig. 1 is a schematic view of a cell core of the present invention;
fig. 2 is a schematic diagram of a main section structure of a battery cell of the utility model;
FIG. 3 is a schematic view of a bottom butt-joint block of the present invention in a top-down view;
FIG. 4 is an enlarged view of a portion a of FIG. 2 according to the present invention;
FIG. 5 is a schematic diagram of a main cross-sectional structure of a lithium battery according to the present invention;
FIG. 6 is a schematic side sectional view of the butt-joint groove of the present invention.
In the figure: 1. a cell main body; 2. a first battery separation film; 3. a bottom butt-joint block; 4. bonding the board; 5. a second battery separation film; 6. a first air bag; 7. a communicating pipe; 8. a second air bag; 9. an accommodating chamber; 10. briquetting; 11. a limiting block; 12. a return spring; 13. an outer housing; 14. a protection circuit board; 15. and (4) butting the grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a power battery cell comprises a cell main body 1 and a first battery isolating membrane 2, wherein the first battery isolating membrane 2 surrounds the outer side of the cell main body 1 to provide protection for the cell main body, the lower end of the first battery isolating membrane 2 extends out of the lower part of the cell main body 1, a bottom butt joint block 3 is arranged below the cell main body 1, the bottom butt joint block 3 is bonded with the cell main body 1, the bottom butt joint block 3 is arranged at the inner side of the first battery isolating membrane 2, a second battery isolating membrane 5 is arranged at the outer side of the bottom butt joint block 3, the second battery isolating membrane 5 covers the outer side of the bottom butt joint block 3 and is used for being in butt joint with the first battery isolating membrane 2 to seal the bottom of the cell main body 1, a first air bag 6 is arranged at the outer side of the bottom butt joint block 3 in a surrounding mode, a communicating pipe 7 is connected to the inner side of the first air bag 6, a second air bag 8 is connected to the inner end of the communicating pipe 7, the second air bag 8 is installed inside the bottom butt joint block 3 through a containing cavity 9, the inner space of the second air bag 8 is communicated with the inner space of the first air bag 6 through a communicating pipe 7, a pressing block 10 is arranged below the second air bag 8, the lower end of the pressing block 10 penetrates through the lower surface of the bottom butt joint block 3, and the pressing block 10 can extrude the second air bag 8 to deform after being pressed;
the upper surface of the bottom butt joint block 3 is fixed with a bonding plate 4, the bottom butt joint block 3 is connected with the cell main body 1 through the bonding plate 4, the bottom butt joint block 3 is installed below the cell main body 1, the lower end extension length of the first battery isolation membrane 2 is equal to the height of the bottom butt joint block 3, the lowest sagging point of the second battery isolation membrane 5 on the bottom butt joint block 3 is located below the lowest point of the first gas bag 6, the pressing block 10 is designed in a T-shaped structure, an up-and-down sliding structure is formed between the pressing block 10 and the bottom butt joint block 3, a limiting block 11 is arranged inside the pressing block 10, the limiting block 11 is horizontally installed, the limiting block 11 forms a left-and-right telescopic structure through a return spring 12 and the pressing block 10, and the limiting block 11 moves into the accommodating cavity 9 and can extend out to limit the pressing block 10 under the action of the return spring 12;
the outside of electric core main part 1 is protected through first battery barrier film 2, first battery barrier film 2 installation back, can be with the bottom butt joint piece 3 bottom of installing electric core main part 1 through bond plate 4, make second battery barrier film 5 be located the extension end inboard of first battery barrier film 2, then press briquetting 10, make it extrude second gasbag 8, carry inside gas in first gasbag 6 through communicating pipe 7 after second gasbag 8 is pressed, make first gasbag 6 volume inflation, outwards promote second battery barrier film 5 and remove, make second battery barrier film 5 and first battery barrier film 2 laminate each other, carry out the shutoff protection with the bottom of electric core main part 1, stopper 11 stretches out under reset spring 12's effect after removing the inside that holds chamber 9 simultaneously, it is spacing to briquetting 10, prevent briquetting 10 from moving downwards.
A lithium battery comprises a battery cell, an outer shell 13 and a protection circuit board 14, wherein the outer shell 13 is arranged outside the battery cell to provide protection for the battery cell, an electrode of the battery cell is connected with the protection circuit board 14, the battery cell is the battery cell, a butt joint groove 15 is formed in the outer shell 13, and a concave-convex matching structure is formed between the butt joint groove 15 and the battery cell;
can install in inserting the butt joint groove 15 in the shell body 13 with electric core main part 1, the lower extreme of electric core main part 1 is inserted and is accomplished the location in butt joint groove 15, and butt joint groove 15 can provide the support to the outside of first battery barrier film 2 simultaneously, and inserts back briquetting 10 and will extrude second gasbag 8 with automatic pressurized, and first gasbag 6 promotes second battery barrier film 5 and is connected with first battery barrier film 2, accomplishes the installation to electric core main part 1.
The working principle is as follows: when using this power battery electricity core and the lithium cell that contains this electricity core, can install electricity core main part 1 and form the lithium cell in shell body 13, insert the lower extreme of electricity core main part 1 in butt joint groove 15, second battery barrier film 5 receives about first gasbag 6 simultaneously and in butt joint groove 15 and the laminating that first battery barrier film 2 kept stable, form sealedly bottom electric core.
Those not described in detail in this specification are within the skill of the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (6)
1. A power battery cell comprises a cell main body (1) and a first battery isolating membrane (2), wherein the first battery isolating membrane (2) surrounds the outside of the cell main body (1) to provide protection for the cell main body;
the method is characterized in that: the lower end of the first battery isolating membrane (2) extends out of the lower part of the battery core main body (1), a bottom butt joint block (3) is arranged below the battery core main body (1), the bottom butt joint block (3) is bonded with the battery core main body (1), the bottom butt joint block (3) is arranged on the inner side of the first battery isolating membrane (2), a second battery isolating membrane (5) is arranged on the outer side of the bottom butt joint block (3), the second battery isolating membrane (5) covers the outer side of the bottom butt joint block (3) and is used for being in butt joint with the first battery isolating membrane (2) to seal the bottom of the battery core main body (1), a first air bag (6) is arranged around the outer side of the bottom butt joint block (3), a communicating pipe (7) is connected to the inner side of the first air bag (6), a second air bag (8) is connected to the inner end of the communicating pipe (7), and the second air bag (8) is installed inside the bottom butt joint block (3) through an accommodating cavity (9), and the inner space of the second air bag (8) is communicated with the inner space of the first air bag (6) through the communicating pipe (7), a pressing block (10) is arranged below the second air bag (8), the lower end of the pressing block (10) penetrates through the lower surface of the bottom butt joint block (3), and the pressing block (10) can extrude the second air bag (8) to deform.
2. The power battery cell of claim 1, wherein: the upper surface of bottom butt joint piece (3) is fixed with splice plate (4), and bottom butt joint piece (3) are connected through splice plate (4) and electric core main part (1), install bottom butt joint piece (3) in the below of electric core main part (1).
3. The power battery cell of claim 1, wherein: the extension length of the lower end of the first battery isolation membrane (2) is equal to the height of the bottom butt joint block (3), and the lowest point of the second battery isolation membrane (5) on the bottom butt joint block (3) which hangs down is positioned below the lowest point of the first air bag (6).
4. The power battery cell of claim 1, wherein: the pressing block (10) is designed to be of a T-shaped structure, and an up-and-down sliding structure is formed between the pressing block (10) and the bottom butt joint block (3).
5. The power battery cell of claim 4, wherein: the inside of briquetting (10) is provided with stopper (11), and stopper (11) horizontal installation to extending structure about stopper (11) pass through between reset spring (12) and briquetting (10), stopper (11) move hold chamber (9) in can stretch out under the effect of reset spring (12) and carry on spacingly to briquetting (10).
6. A lithium battery comprises a battery core, an outer shell (13) and a protective circuit board (14), wherein the outer shell (13) is arranged outside the battery core to provide protection for the battery core, and an electrode of the battery core is connected with the protective circuit board (14);
the method is characterized in that: the battery cell is the battery cell in any one of claims 1 to 5, the outer casing (13) is provided with a butt joint groove (15) inside, and a concave-convex matching structure is formed between the butt joint groove (15) and the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122751448.5U CN216671801U (en) | 2021-11-10 | 2021-11-10 | Power battery cell and lithium battery comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122751448.5U CN216671801U (en) | 2021-11-10 | 2021-11-10 | Power battery cell and lithium battery comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216671801U true CN216671801U (en) | 2022-06-03 |
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ID=81785320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122751448.5U Active CN216671801U (en) | 2021-11-10 | 2021-11-10 | Power battery cell and lithium battery comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216671801U (en) |
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2021
- 2021-11-10 CN CN202122751448.5U patent/CN216671801U/en active Active
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