CN219203242U - Laminated battery pole group package, electric core, battery system and electric equipment - Google Patents
Laminated battery pole group package, electric core, battery system and electric equipment Download PDFInfo
- Publication number
- CN219203242U CN219203242U CN202223529622.2U CN202223529622U CN219203242U CN 219203242 U CN219203242 U CN 219203242U CN 202223529622 U CN202223529622 U CN 202223529622U CN 219203242 U CN219203242 U CN 219203242U
- Authority
- CN
- China
- Prior art keywords
- pole
- group
- pole group
- monopole
- positive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a laminated battery pole group package, an electric core, a battery system and electric equipment. The utility model relates to a laminated battery pole group package, which consists of at least two monopole groups, wherein every two adjacent monopole groups from left to right are combined to form a plurality of pole group packages; the two sides of a pole group A of one pole group package are provided with a negative pole piece ending diaphragm, the ending structure of the other pole group B of the pole group package is that the pole group B at the side of the contact pole group A is ended by a positive pole piece ending diaphragm, and the other side of the contact pole group is ended by a negative pole piece ending diaphragm; the positive pole side of the monopole group B is contacted with the monopole group A in parallel to form an improved back pole group package; four sides of each pole group package are fixed by adhesive tapes, and the diaphragm ending adhesive tapes of two pole groups in each pole group package are distributed on the non-contact back surface. The utility model can achieve the purpose by optimizing the lamination and the assembly process without greatly changing the prior equipment and tools, and has simple operation, low transformation cost and obvious improvement effect.
Description
Technical Field
The utility model relates to the field of manufacturing of large-capacity batteries, in particular to a laminated battery pole group package with high energy density.
Background
The high-capacity battery has higher space utilization rate and higher energy density, and has wide functions in the fields of electric vehicles, energy storage power stations, outdoor power supplies and the like. The pole group is divided into a winding structure pole group and a lamination structure pole group structurally. The battery with the laminated structure is limited by the lamination machine, and the number of layers and thickness of the positive electrode and the negative electrode of the monopole group are limited, so that in order to form a high-capacity battery, a plurality of monopole groups are needed to form a pole group package of a multipolar group, and then the pole group package is welded on a battery cover in parallel to form the high-capacity battery.
The pole piece coating mode of the large-capacity battery is continuous coating, and the lamination structure of the positive and negative pole pieces of the monopole group is ended by a negative pole piece and ended by a diaphragm. Taking a battery with four-pole groups as an example, two single-pole groups are combined into a pole group package, and then the two pole group packages form a finished battery pole group which is welded on a battery cover. However, the combination mode can cause that the cathode plates on the non-positive side which are not aligned and ended on the two large surfaces of the monopole group do not participate in the lithium intercalation reaction in the charge-discharge process, and the thickness of the pole group and the weight of the battery core can be increased, so that the energy density of the battery core can be reduced, the stress of the pole group in the shell is increased, the shell-in-shell ratio of the pole group is increased, and the cycle life of the battery core is influenced.
Most of the existing power laminated batteries adopt pole pieces manufactured by continuous coating, so that both sides of a negative pole piece are coated with negative pole materials. The current lamination machine has limited capacity, and poor alignment among positive plates, negative plates and diaphragms can be increased rapidly when lamination exceeds a certain number of layers, so that the yield is reduced rapidly. To achieve greater cell capacity, multiple monopolar packs are typically required to be connected in parallel to form a pole pack. Therefore, every two pole groups are connected in parallel, and one side of more than two cathodes at the parallel connection position cannot be utilized. Not only waste materials and reduce energy density, but also increase the thickness of the pole group and the charge-discharge cyclic stress. The existing laminated battery pole group package is formed by connecting a plurality of monopole groups in parallel, and a layer of negative electrode material and a layer of current collector are added between every two pole group packages connected in parallel.
Disclosure of Invention
The utility model aims to solve the defects of low energy density and large stress of a pole group in the existing pole group packaging mode of the existing high-capacity lithium ion battery, provides a novel pole group structure and a pole group packaging mode, and solves the problems of low energy density and large stress of a battery core of the traditional multipole group structure.
The technical scheme of the utility model is as follows:
the utility model relates to a laminated battery pole group package with high energy density, which consists of at least two monopole groups, wherein the monopole groups are sequentially arranged from left to right, and every two adjacent monopole groups from left to right are combined to form a plurality of pole group packages; the positive and negative pole piece lamination ending structure of one pole group A in each pole group package is that a positive pole piece is coated by a negative pole piece, the two sides of the pole group are provided with negative pole pieces, finally, the end structure of the other pole group B of the pole group package is that the pole group B contacting the side of the pole group A ends the diaphragm with the positive pole piece, the other side ends the diaphragm with the negative pole piece, the number of the positive pole pieces of the pole group B is the same as that of the positive pole pieces of the pole group A, and the number of the negative pole pieces of the pole group B and the number of the diaphragm layers are one layer less than those of the negative pole pieces of the pole group A; the positive pole side of the monopole group B is contacted with the monopole group A in parallel to form an improved back pole group package; four sides of each pole group package are fixed by adhesive tapes, and the diaphragm ending adhesive tapes of two pole groups in each pole group package are distributed on the non-contact back surface.
The parallel connection mode of the electrode group A and the electrode group B is that the positive electrode lug of the electrode group A is aligned with the positive electrode lug of the electrode group B, the negative electrode lug of the electrode group A is aligned with the negative electrode lug of the electrode group B, then the two electrode groups are contacted, the positive electrode lug and the negative electrode lug of the electrode group A are respectively welded with the positive electrode lug and the negative electrode lug of the electrode group B, and the four side surfaces of the electrode group package are packaged and fixed together by adhesive tapes to form the parallel connection electrode group package.
The device consists of three monopole groups, wherein the monopole group B, the monopole group A and the monopole group B are sequentially arranged from left to right, and the positive pole side of the monopole group B positioned at two sides is in contact parallel with the monopole group A.
Two improved pole group packages consisting of four monopole groups are connected in parallel to form a full pole group package.
The two improved pole group packages are connected in parallel to form a full pole group package, the two improved pole group packages are stacked in parallel, positive lugs of the two improved pole group packages are aligned with the positive lugs, negative lugs are aligned with the negative lugs, then all the positive lugs are welded, and all the negative lugs are welded to form the full pole group package.
A battery cell is composed of a plurality of all-pole groups.
A battery system is composed of a plurality of battery cells.
An electric device is composed of a plurality of battery systems.
The utility model has the advantages that:
1. compared with a pole group package of N layers of positive pole pieces/N+1 layers of negative pole pieces, the pole group package designed by the utility model has the advantages that the thickness of one negative pole piece and one diaphragm can be thinned on the premise of not reducing the capacity, the total weight can be reduced by the weight of one negative pole piece and one diaphragm, the volume of one negative pole piece and one diaphragm can be increased by the liquid injection space, the effects of reducing the weight, reducing the thickness, increasing the liquid injection amount and reducing the stress of the pole group are achieved, and the purposes of improving the energy density of a battery cell and improving the cycle performance are further achieved.
2. The utility model can achieve the purpose by optimizing the lamination and the assembly process without greatly changing the prior equipment and tools, and has simple operation, low transformation cost and obvious improvement effect.
According to the utility model, the energy density of the laminated battery can be improved, the thickness of the pole group is reduced, and the cycle performance is improved by changing the ending mode of the positive pole piece and the negative pole piece of the monopole group and the composition mode of the pole group package.
The technical proposal of the utility model has the beneficial effects that
(1) Compared with the conventional pole group package, the pole group package with two parallel pole groups provided by the utility model has the advantages that one piece of negative pole piece is reduced, so that the weight of the pole group package is reduced by one piece of negative pole piece, and the weight energy density of the whole battery core can be improved under the condition that the capacity is not attenuated.
(2) Compared with the conventional pole group package, the pole group package with two parallel pole groups provided by the utility model has the advantages that one piece of negative pole piece is approximately fewer, so that the thickness of one layer of negative pole piece is also fewer in thickness, the thickness and the volume of the pole group package are smaller, the gap between the pole group package in the shell and the wall of the battery shell is larger, more electrolyte can be injected, and longer cycle life can be supported. Under the condition that the thickness in the battery shell is unchanged, the pole group package is thinned, so that the pressure of the battery shell received by the pole group can be reduced when the pole group is circularly expanded, and the cycle life can be prolonged by smaller pressure.
Drawings
FIG. 1 is a front view of a monopolar group structure (electrode group A) prior to modification;
FIG. 1a is a side view of a monopolar group configuration (electrode group A) prior to modification;
FIG. 2 is a front view of a monopolar pack configuration prior to retrofitting;
FIG. 2a is a side view of a monopolar pack configuration prior to modification;
FIG. 3 is a front view of an improved monopolar group configuration (electrode group B) provided by one embodiment of the present application;
FIG. 3a is a side view of an improved monopolar group configuration (electrode group B) provided by one embodiment of the present application;
FIG. 4 is a front view of an improved monopole packet structure according to an embodiment of the present application;
fig. 4a is a side view of an improved monopole packet structure according to an embodiment of the present application.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings
In the conventional monopole lamination process, two sides of a pole group are terminated by a negative pole piece and are terminated by a diaphragm, as shown in fig. 1 and fig. 1a, the structure of the monopole group with a front lamination structure is improved, the diaphragm is arranged between the positive pole piece and the negative pole piece, the positive pole is coated by the negative pole, the two sides of the pole group are provided with the negative pole piece, the diaphragm is wound outside the negative pole piece and terminated, and the diaphragm is fixed by a narrow adhesive tape. In the figure: the negative plate 1, the positive plate 2, the diaphragm ending fixing adhesive tape 3 and the diaphragm 4.
The existing laminated battery pole group package is formed by connecting a plurality of monopole groups in parallel, and a layer of negative electrode material and a layer of current collector are added between every two pole group packages connected in parallel. As shown in fig. 2 and 2a, the monopole group package before improvement is formed by connecting two pole groups in parallel and packaging and fixing the pole groups by using a wide adhesive tape. In fig. 2: pole group package 5, packing sticky tape 6.
The utility model relates to a laminated battery pole group package with high energy density, which consists of at least two monopole groups, wherein a plurality of monopole groups are sequentially arranged from left to right, and every two adjacent monopole groups from left to right are combined to form a pole group package; each pole group package is provided with a pole group A, the lamination ending mode of the positive pole plate and the negative pole plate of the pole group A is the same as that of the traditional pole group, both sides of the pole group are provided with negative pole plate ending diaphragms ending, the ending mode of the other pole group B of each pole group package is that the contact surface of the pole group B contacting the pole group A is ended by the positive pole ending diaphragms, the other side is ended by the negative pole plate ending diaphragms, the number of layers of the positive pole plates of the pole group B is the same as that of the pole group A, and the negative pole plates are less folded than the pole group A; the positive pole side of the monopole group B is contacted with the monopole group A in parallel to form an improved back pole group package; four sides of each pole group package are fixed by adhesive tapes, and the diaphragm ending adhesive tapes of two pole groups in each pole group package are distributed on the back surface of the non-contact pole group package.
As shown in fig. 3 and 3a, the monopole group with the improved back lamination structure is formed by removing the outermost diaphragm and the negative electrode on one side based on the original pole group, ending the diaphragm with the positive plate, and fixing the diaphragm by a narrow adhesive tape. In the figure: diaphragm 7, positive electrode sheet 8, diaphragm ending fixing adhesive tape 9 and negative electrode sheet 10
As shown in fig. 4 and fig. 4a, one improved monopole set is connected in parallel with the monopole set before improvement, wherein the positive side of the improved monopole set is connected with the monopole set before improvement in parallel, and four sides of the novel pole set are packaged and fixed by using wide adhesive tapes. In fig. 4: pole group wrapping tape 11 and improved monopole group 12
The utility model is described in detail as follows:
1. for the battery core of the bipolar group structure, the monopolar group in fig. 1 before improvement and the monopolar group in fig. 3 after improvement are connected in parallel to form a pole group package, wherein the positive pole side of the monopolar group in fig. 3 is connected in parallel with the contact of the monopolar group in fig. 1, as shown in fig. 4.
2. For the battery core of the three-pole group structure, two improved monopole groups in fig. 3 and one improved monopole group in fig. 1 are connected in parallel to form a full-pole group package, the two improved pole groups are distributed on two sides of the full-pole group package, and the positive pole side is connected with the pole group before improvement in parallel.
3. For the battery core of the four-pole group structure, two improved pole group packages in fig. 4 are connected in parallel to form a full pole group package, the two improved pole group packages are stacked in parallel, positive lugs of the two improved pole group packages are aligned with the positive lugs, negative lugs are aligned with the negative lugs, then all the positive lugs are welded, and after all the negative lugs are welded, the full pole group package is formed.
Experience shows that the battery core made of the improved pole group package can reduce the thickness of the battery core, improve the energy density and reduce the material cost.
The principle of the utility model is that the purposes of reducing the weight, reducing the thickness and increasing the liquid injection space of the battery are achieved by optimizing the ending mode of the pole pieces in the pole group and the structure of the pole group package on the premise of not reducing the capacity, so that the volume and the weight energy density of the battery core are improved, the surface stress of the pole group is reduced, and the cycle performance of the battery core is improved.
Claims (8)
1. The laminated battery pole group package is characterized by comprising at least two monopole groups, wherein the monopole groups are sequentially arranged from left to right, and every two adjacent monopole groups from left to right are combined to form a plurality of pole group packages; the positive and negative pole piece lamination ending structure of one pole group A in each pole group package is that a positive pole piece is coated by a negative pole piece, the two sides of the pole group are provided with negative pole pieces, finally, the end structure of the other pole group B of the pole group package is that the pole group B contacting the side of the pole group A ends the diaphragm with the positive pole piece, the other side ends the diaphragm with the negative pole piece, the number of the positive pole pieces of the pole group B is the same as that of the positive pole pieces of the pole group A, and the number of the negative pole pieces of the pole group B and the number of the diaphragm layers are one layer less than those of the negative pole pieces of the pole group A; the positive pole side of the monopole group B is contacted with the monopole group A in parallel to form an improved back pole group package; four sides of each pole group package are fixed by adhesive tapes, and the diaphragm ending adhesive tapes of two pole groups in each pole group package are distributed on the non-contact back surface.
2. The laminated battery pole group package according to claim 1, wherein the parallel connection mode of the pole group a and the pole group B is that the positive pole lug of the pole group a is aligned with the positive pole lug of the pole group B, the negative pole lug of the pole group a is aligned with the negative pole lug of the pole group B, then the two pole groups are contacted, the positive pole lug and the negative pole lug of the pole group a are respectively welded with the positive pole lug and the negative pole lug of the pole group B, and the four sides of the pole group package are packaged and fixed together by adhesive tapes to form the parallel connection pole group package.
3. The laminated battery pole group package according to claim 1, comprising three monopole groups, wherein the monopole group B, the monopole group a and the monopole group B are sequentially arranged from left to right, and the positive pole side of the monopole group B positioned at two sides is in contact parallel with the monopole group a.
4. The laminated battery pole pack of claim 1, wherein two improved pole packs of four monopolar packs are connected in parallel to a full pole pack.
5. The laminated battery pole pack of claim 4 wherein the two improved pole packs are connected in parallel to form a full pole pack, the two improved pole packs are stacked in parallel, the positive tabs of the two improved pole packs are aligned with the positive tabs, the negative tabs are aligned with the negative tabs, then all the positive tabs are welded, and all the negative tabs are welded to form the full pole pack.
6. A battery cell comprising a plurality of the full pole packs of claim 4 or 5.
7. A battery system comprising a plurality of battery cells according to claim 6.
8. An electrical consumer comprising a plurality of battery systems according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223529622.2U CN219203242U (en) | 2022-12-29 | 2022-12-29 | Laminated battery pole group package, electric core, battery system and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223529622.2U CN219203242U (en) | 2022-12-29 | 2022-12-29 | Laminated battery pole group package, electric core, battery system and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219203242U true CN219203242U (en) | 2023-06-16 |
Family
ID=86716748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223529622.2U Active CN219203242U (en) | 2022-12-29 | 2022-12-29 | Laminated battery pole group package, electric core, battery system and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219203242U (en) |
-
2022
- 2022-12-29 CN CN202223529622.2U patent/CN219203242U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201122626Y (en) | Pole piece of stack type battery and pole core and battery including the same | |
| US20230369733A1 (en) | Lithium-ion battery | |
| CN102683742A (en) | Lithium ion battery cell and preparation method thereof | |
| CN113078366A (en) | In-situ lithium supplement method for flexible package lithium ion battery and battery manufacturing method | |
| CN113224392A (en) | Roll core for high-capacity battery, parallel roll core group and high-capacity battery | |
| CN202695606U (en) | Z-shaped laminated cell of lithium ion battery for high-capacity automobile | |
| CN219203242U (en) | Laminated battery pole group package, electric core, battery system and electric equipment | |
| CN112103554A (en) | Three-electrode repairable lithium ion battery | |
| CN115020637B (en) | Sodium supplementing pole piece, sodium ion battery and preparation method of sodium supplementing pole piece | |
| CN204927442U (en) | Tail welds formula power type battery | |
| CN114883531A (en) | Three-electrode lithium ion battery and lithium pre-charging and lithium supplementing method thereof | |
| CN201741762U (en) | High-capacity high-power lithium ion battery | |
| CN112164830A (en) | Button lithium battery containing solid electrolyte and manufacturing method thereof | |
| CN202758957U (en) | Novel high charge-discharge rate battery | |
| CN201927674U (en) | Lithium-ion battery comprising anode pole piece provided with strip non-foil parts | |
| CN201927675U (en) | Lithium ion battery with negative pole piece with strip-shaped empty foil parts | |
| CN216980649U (en) | Lithium battery and lithium battery pole piece | |
| CN218648005U (en) | Lithium ion battery | |
| CN220585448U (en) | Polymer lithium ion battery cell structure for adjusting lug position | |
| CN219843005U (en) | Lamination cell structure and secondary battery | |
| CN220341286U (en) | High-speed charging battery cell module and battery | |
| CN220324662U (en) | Core package assembly and multi-pole group battery core | |
| CN218414631U (en) | Pole piece structure for improving cycle performance of lithium battery and lithium ion battery | |
| CN215070082U (en) | Battery core with laminated structure and high-voltage lithium battery | |
| CN212625971U (en) | Lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |