CN212461731U - Battery core, single battery and battery module - Google Patents
Battery core, single battery and battery module Download PDFInfo
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- CN212461731U CN212461731U CN202021186324.6U CN202021186324U CN212461731U CN 212461731 U CN212461731 U CN 212461731U CN 202021186324 U CN202021186324 U CN 202021186324U CN 212461731 U CN212461731 U CN 212461731U
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- pole piece
- battery
- negative pole
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- negative
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- 239000011247 coating layer Substances 0.000 claims description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 239000011888 foil Substances 0.000 claims description 14
- 239000011889 copper foil Substances 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000005611 electricity Effects 0.000 abstract description 9
- 239000000178 monomer Substances 0.000 abstract description 3
- 239000011267 electrode slurry Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000006258 conductive agent Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000006256 anode slurry Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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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
-
- 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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- Secondary Cells (AREA)
Abstract
The utility model discloses an electricity core, battery cell and battery module relates to power battery technical field. The battery core is a laminated core package and comprises a positive pole piece, a diaphragm and a negative pole piece, wherein the positive pole piece, the diaphragm and the negative pole piece are sequentially overlapped to form the laminated core package, the thickness of a single positive pole piece is 0.2-2.0 mm, the thickness of a single negative pole piece is 0.2-1.5 mm, and the sum of the number of the positive pole pieces and the number of the negative pole pieces is less than 40. The utility model provides an electricity core through the thickness that increases positive pole piece and negative pole piece, reduces the quantity of the required positive pole piece of the monomer battery of same capacity and negative pole piece to improve the production efficiency of electricity core.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to an electricity core, battery cell and battery module.
Background
The lithium ion battery is mainly formed by winding or laminating a plurality of layers of positive and negative electrode thin layers, and is widely applied to the fields of portable electronic products, electric automobiles and the like.
In the laminated core package in the prior art, the positive pole piece and the negative pole piece are very thin, so that one battery cell comprises a plurality of positive pole pieces and a plurality of negative pole pieces, the production process is relatively complex, and the manufacturing efficiency of the battery cell is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electricity core to improve the production efficiency of electricity core.
To achieve the purpose, the utility model adopts the following technical proposal:
the battery core is a laminated core package and comprises a positive pole piece, a diaphragm and a negative pole piece, wherein the positive pole piece, the diaphragm and the negative pole piece are sequentially overlapped to form the laminated core package, the thickness of the single positive pole piece is 0.2-2.0 mm, the thickness of the single negative pole piece is 0.2-1.5 mm, and the sum of the number of the positive pole piece and the number of the negative pole piece is less than 40.
Optionally, the positive electrode plate comprises an aluminum foil, and positive electrode coating layers are arranged on two sides of the aluminum foil; the negative pole piece comprises a copper foil, and negative pole coating layers are arranged on two sides of the copper foil.
Optionally, the thickness of the aluminum foil is 0.005mm to 0.01mm, and the thickness of the copper foil is 0.004mm to 0.01 mm.
Optionally, the density of the positive electrode coating layer is 1500g/m2～3000g/m2(ii) a The density of the negative coating layer is 750g/m2～1500g/m2。
Optionally, the positive electrode coating layer and the negative electrode coating layer are both provided with holes.
Optionally, the depth of the hole is 0.015mm to 0.09 mm.
Optionally, the concentration of the pores is 50% to 80%.
Optionally, the diameter of the hole is 0.01mm to 0.05 mm.
Another object of the present invention is to provide a single battery, so as to improve the production efficiency of the single battery.
To achieve the purpose, the utility model adopts the following technical proposal:
the single battery comprises a shell and the battery cell, wherein the battery cell is arranged in the shell, and a positive cover plate and a negative cover plate are respectively arranged on two sides of the shell.
The utility model discloses a still another aim at provides a battery module to improve battery module's production efficiency.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery module comprises the single battery.
The utility model has the advantages that:
the utility model provides an electric core, including positive pole piece and negative pole piece, the thickness of single positive pole piece is 0.2mm ~ 2.0mm, and the thickness of single negative pole piece is 0.2mm ~ 1.5mm, and the quantity sum of positive pole piece and negative pole piece is less than 40. The utility model provides an electricity core through the thickness that increases positive pole piece and negative pole piece, reduces the quantity of the required positive pole piece of the monomer battery of same capacity and negative pole piece to improve the production efficiency of electricity core.
The utility model provides a single battery uses foretell electric core, guarantees under the prerequisite of single battery capacity, has improved single battery's production efficiency. Moreover, the two sides of the single battery are respectively provided with the positive electrode cover plate and the negative electrode cover plate, and under the same appearance size, compared with the single battery in which the positive and negative poles are led out from the same side of the shell in the prior art, the capacity of the single battery is improved.
The utility model provides a battery module uses above-mentioned battery cell, has improved battery module's production efficiency, has promoted battery module's capacity simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single battery provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery module according to an embodiment of the present invention.
In the figure:
1. a positive electrode plate; 2. a negative pole piece; 3. a diaphragm;
11. aluminum foil; 12. a positive electrode coating layer; 21. copper foil; 22. a negative electrode coating layer;
100. a single battery;
101. an electric core; 102. a positive electrode cover plate; 103. a negative electrode cover plate; 104. a housing; 105. an inner protective film; 106. an outer protective film; 107. an aluminum connecting sheet; 108. a copper connecting sheet;
200. a battery module;
201. a side plate; 202. a base plate; 203. an upper cover plate; 204. an end plate; 205. an insulating sheet; 206. a confluence sheet; 207. a flexible circuit board; 208. a plastic support; 209. a silica gel pad; 210. a middle end plate; 211. copper bars are arranged.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the embodiment provides an electrical core, which is a laminated core package and includes a positive electrode plate 1, a diaphragm 3, and a negative electrode plate 2, where the positive electrode plate 1, the diaphragm 3, and the negative electrode plate 2 are sequentially stacked to form the laminated core package, where the thickness of a single positive electrode plate 1 is 0.2mm to 2.0mm, the thickness of a single negative electrode plate 2 is 0.2mm to 1.5mm, and the sum of the numbers of the positive electrode plate 1 and the negative electrode plate 2 is less than 40.
The battery cell provided by the embodiment includes a positive electrode plate 1 and a negative electrode plate 2, the thickness of a single positive electrode plate 1 is 0.2 mm-2.0 mm, the thickness of a single negative electrode plate 2 is 0.2 mm-1.5 mm, and the sum of the number of the positive electrode plate 1 and the number of the negative electrode plate 2 is less than 40. The utility model provides an electricity core through the thickness that increases positive pole piece 1 and negative pole piece 2, reduces the quantity of the required positive pole piece 1 of the monomer battery of the same capacity and negative pole piece 2 to improve electric core 101's production efficiency.
Optionally, the positive electrode plate 1 includes an aluminum foil 11, and both sides of the aluminum foil 11 are provided with positive electrode coating layers 12; the negative pole piece 2 comprises a copper foil 21, and two sides of the copper foil 21 are provided with a negative pole coating layer 22. Specifically, the thickness of the aluminum foil 11 is 0.005mm to 0.01mm, and the thickness of the copper foil 21 is 0.004mm to 0.01 mm. In the present embodiment, the positive electrode coating layer 12 includes a positive electrode material, a conductive agent and a binder, and the positive electrode material, the conductive agent and the binder are prepared according to a first set ratio; the anode coating layer 22 includes an anode material, a conductive agent, and a binder, which are formulated in a second set ratio. The first set proportion is (90-98): (1-5): (1-5); the second set proportion is (90-95): (1-3): (2-8). The specific preparation proportion can be specifically selected according to actual conditions. Preparing a positive electrode material, a conductive agent and a binder into positive electrode slurry according to a first set proportion, and then uniformly coating the positive electrode slurry on two sides of an aluminum foil 11 to form a positive electrode coating layer 12; then, the anode coating layer 12 is dried and rolled into the anode plate 1 with a sandwich structure with the thickness of 0.2 mm-2.0 mm. Preparing a negative electrode material, a conductive agent and a binder into negative electrode slurry according to a second set proportion, and then uniformly coating the negative electrode slurry on two sides of the copper foil 21 to form a negative electrode coating layer 22; then, the negative coating layer 22 is dried and rolled into a negative pole piece 2 with a sandwich structure with the thickness of 0.2 mm-1.5 mm. It should be noted that, the drying of the positive electrode coating layer 12 and the negative electrode coating layer 22, the rolling of the positive electrode coating layer 12 and the aluminum foil 11, and the rolling of the negative electrode coating layer 22 and the copper foil 21 are already the prior art, and are not described herein again.
Alternatively, the density of the positive electrode coating layer 12 is 1500g/m2～3000g/m2(ii) a The density of the anode coating layer 22 was 750g/m2～1500g/m2. In this embodiment, taking the case 44220 as an example, 44220 specifically means that the case 104 has a length of 220mm and a width of 44 mm. The positive pole piece 1 and the negative pole piece 2 adopt the same formula of slurry, different battery cores 101 are prepared by coating with different coating densities, and then the battery cores 101 are numbered and tested. Table 1 is a table of performance parameters of different numbered cells 101.
TABLE 1
In table 1, the aluminum foil 11 is coated with the positive electrode slurry of different densities to obtain the positive electrode plates 1 of different thicknesses, the number of the positive electrode plates 1 of the battery cell 101 in the casing 104 of the same specification and size is 10 to 16, and the density of the positive electrode plate 1 is 1500g/m2～3000g/m2The performance parameters of the O # -6# battery cells are all in the standard range.
Optionally, the positive and negative electrode coating layers 12 and 22 are each provided with holes. Specifically, the depth of the hole is 0.015mm to 0.09 mm. The concentration of pores is 50-80%. The diameter of the hole is 0.01 mm-0.05 mm. Holes are punched in the positive coating layer 12 and the negative coating layer 22 to improve the wettability of the positive pole piece 1 and the negative pole piece 2, so that the electrical property of the battery cell 101 is improved. In table 1, the 0# cell and the 1# cell are different in that: the positive coating layer 12 of the 0# cell is not perforated, and the positive coating layer 12 of the 1# cell is perforated. The comparison of the performance parameters of the 0# cell and the 1# cell shows that: the direct current internal resistance of 0# electric core is greater than the direct current internal resistance of 1# electric core, and the 3C multiplying power discharge temperature rise is also greater than the 3C multiplying power discharge temperature rise of 1# electric core. The electrical properties of the cell 101 with the hole in the positive electrode coating layer 12 are better than those of the cell 101 without the hole in the positive electrode coating layer 12.
The manufacturing steps of the battery cell provided by the embodiment are as follows:
(1) the method comprises the following steps of (90-98): (1-5): preparing anode slurry according to the preparation ratio of (1-5), and uniformly coating the anode slurry on two sides of an aluminum foil 11 with the thickness of 0.005 mm-0.01 mm to form an anode coating layer 12 on the two sides.
(2) Then, the anode coating layer 12 is dried and rolled into the anode plate 1 with a sandwich structure with the thickness of 0.2 mm-2.0 mm.
(3) Mixing (90-95) a negative electrode material, a conductive agent and a binder: (1-3): and (2) preparing a negative electrode slurry according to the preparation ratio of (2-8), and then uniformly coating the negative electrode slurry on two sides of the copper foil 21 to form a negative electrode coating layer 22 on the two sides.
(4) Then, the negative coating layer 22 is dried and rolled into a negative pole piece 2 with a sandwich structure with the thickness of 0.2 mm-1.5 mm.
(5) Punching the positive coating layer 12 on two sides of the positive pole piece 1 and the negative coating layer 22 on two sides of the negative pole piece 2, wherein the depth of the holes is 0.015-0.09 mm, the concentration of the holes is 50-80%, and the diameter of the holes is 0.01-0.05 mm.
(6) And sequentially superposing the positive pole piece 1, the diaphragm 3 and the negative pole piece 2 to form the battery core 101.
As shown in fig. 2, this embodiment further provides a single battery, which includes a casing 104 and the above battery core, where the battery core 101 is disposed in the casing 104, and two sides of the casing 104 are respectively provided with a positive cover plate 102 and a negative cover plate 103. In the present embodiment, after the battery cell 101 is manufactured, the battery cell 101 is covered by the inner protective film 105 to protect the battery cell 101. Then, the battery cell 101 is placed in the casing 104, and then the casing 104 is wrapped with the outer protective film 106, and is an aluminum casing. The positive and negative electrode lugs on two sides of the battery core 101 are respectively connected with an upper aluminum connecting sheet 107 and a copper connecting sheet 108, then the positive cover plate 102 and the negative cover plate 103 are respectively connected with two ends of the shell 104, and the aluminum connecting sheet 107 and the copper connecting sheet 108 respectively extend out of the positive cover plate 102 and the negative cover plate 103 to respectively form a positive electrode pole and a negative electrode pole, and finally the single battery 100 is manufactured. In this embodiment, by increasing the thicknesses of the positive electrode tab 1 and the negative electrode tab 2, the sum of the numbers of the positive electrode tab 1 and the negative electrode tab 2 in the single battery 100 with the same capacity is reduced to 10% -80% of the previous number, which is equivalent to improving the production efficiency of the single battery 100 by 1.25-10 times. In the case 104 of the same size, the capacity of the unit battery 100 is improved by 7%.
The single battery provided by this embodiment employs the above-mentioned battery cell, and improves the production efficiency of the single battery 100 on the premise of ensuring the capacity of the single battery 100. Moreover, the single battery 100 is provided with the positive cover plate 102 and the negative cover plate 103 on two sides of the casing 104, and under the same external dimension, compared with the single battery 100 in which the positive and negative poles are led out from the same side of the casing 104 in the prior art, the capacity of the single battery 100 is improved.
As shown in fig. 3, the present embodiment further provides a battery module, which includes the single battery. In this embodiment, the battery module 200 further includes an upper cover plate 203, a bottom plate 202, two side plates 201, and two end plates 204, and insulating sheets 205 are disposed between the upper cover plate 203, the bottom plate 202, the two end plates 204, and the single batteries 100, so as to perform an insulating function. Upper cover plate 203, bottom plate 202, two curb plates 201 and two end plates 204 form the frame of battery module 200, a plurality of battery cells 100 are placed in the frame, and a plurality of battery cells 100's anodal utmost point post and two curb plates 201 that negative pole post corresponds the frame respectively, be provided with plastic support 208 between battery cells 100 and the curb plate 201, flexible circuit board 207 and busbar 206, plastic support 208 pegs graft respectively on anodal utmost point post and negative pole post, flexible circuit board 207 occupation space is little, self light in weight. The two ends of the bus bar 206 are connected with copper bars 211, and the currents of the plurality of single batteries 100 are led to the electric equipment through the copper bars 211. The middle of a plurality of battery cells 100 is provided with middle end plate 210, is provided with the liquid cooling pipe between two adjacent battery cells 100, and the liquid cooling pipe skin sets up silicone pad 209, and silicone pad 209 easily conducts the heat that battery cell 100 produced to the liquid cooling pipe, reaches radiating effect, can also cushion the impact force that battery cell 100 received, plays antidetonation absorbing effect, protection battery cell 100. The battery module 200 of the present embodiment has a 17% capacity improvement over the previous battery module 200 with the same external dimensions.
The battery module that this embodiment provided uses above-mentioned battery cell, has improved battery module 200's production efficiency, has promoted battery module 200's capacity simultaneously.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides an electric core, electric core (101) are lamination core package, include positive pole piece (1), diaphragm (3) and negative pole piece (2), positive pole piece (1) diaphragm (3) with negative pole piece (2) superpose in proper order and form the lamination core package, its characterized in that, singly the thickness of positive pole piece (1) is 0.2mm ~ 2.0mm, singly the thickness of negative pole piece (2) is 0.2mm ~ 1.5mm, the quantity sum of positive pole piece (1) with negative pole piece (2) is less than 40.
2. The battery cell of claim 1, wherein the positive electrode plate (1) comprises an aluminum foil (11), and a positive electrode coating layer (12) is disposed on each of two sides of the aluminum foil (11); the negative pole piece (2) comprises a copper foil (21), and negative pole coating layers (22) are arranged on two sides of the copper foil (21).
3. The cell of claim 2, wherein the aluminum foil (11) has a thickness of 0.005mm to 0.01mm and the copper foil (21) has a thickness of 0.004mm to 0.01 mm.
4. The electrical core of claim 2, wherein the positive electrode coating layer (12) has a density of 1500g/m2～3000g/m2(ii) a The density of the anode coating layer (22) is 750g/m2～1500g/m2。
5. The electrical core of claim 2, wherein the positive electrode coating layer (12) and the negative electrode coating layer (22) are provided with holes.
6. The electrical core of claim 5, wherein the holes have a depth of 0.015mm to 0.09 mm.
7. The cell of claim 5, wherein the concentration of pores is between 50% and 80%.
8. The cell of claim 5, wherein the hole has a diameter of 0.01mm to 0.05 mm.
9. A battery cell comprising a casing (104), characterized in that it further comprises a battery cell according to any one of claims 1 to 8, the battery cell (101) is disposed in the casing (104), and a positive cover plate (102) and a negative cover plate (103) are disposed on two sides of the casing (104).
10. A battery module comprising the unit battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021186324.6U CN212461731U (en) | 2020-06-23 | 2020-06-23 | Battery core, single battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021186324.6U CN212461731U (en) | 2020-06-23 | 2020-06-23 | Battery core, single battery and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212461731U true CN212461731U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021186324.6U Active CN212461731U (en) | 2020-06-23 | 2020-06-23 | Battery core, single battery and battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212461731U (en) |
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2020
- 2020-06-23 CN CN202021186324.6U patent/CN212461731U/en active Active
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