CN215377638U - High-power lithium ion battery formed by two-body system - Google Patents
High-power lithium ion battery formed by two-body system Download PDFInfo
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- CN215377638U CN215377638U CN202121908555.8U CN202121908555U CN215377638U CN 215377638 U CN215377638 U CN 215377638U CN 202121908555 U CN202121908555 U CN 202121908555U CN 215377638 U CN215377638 U CN 215377638U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E60/13—Energy storage using capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a double-body integrated high-power lithium ion battery, which comprises: the integrated battery core is formed by a lithium ion battery winding core group and a super capacitor winding core group which are connected in parallel, a plurality of lithium ion winding cores which are connected in parallel form the lithium ion winding core group, and a plurality of super capacitor units which are connected in series form the super capacitor winding core group; the super capacitor unit is formed by connecting a plurality of super capacitor winding cores in parallel; the top cover is arranged at the top of the shell, and a plurality of integrated battery cell positive pole columns and integrated battery cell negative pole columns are arranged at the top of the top cover. According to the utility model, the lithium ion battery winding core group and the super capacitor winding core group are used as independent structural units to be integrated in series and parallel, so that the processing and manufacturing complexity can be reduced, the packaging cost is reduced, the integrated battery core can give consideration to the high energy density of the lithium ion battery and the high power performance of the super capacitor, and the power of the integrated battery core is improved.
Description
Technical Field
The utility model relates to the technical field of lithium ion secondary batteries, in particular to a double-body system integrated high-power lithium ion battery.
Background
With the increasing aggravation of environmental pollution and the excessive consumption of fossil energy, the lithium ion battery is used as a novel clean and pollution-free energy with zero emission, and the existing and application values of the lithium ion battery are increasingly prominent. The pure electric vehicle is used as an ultimate solution for a future trip mode, a great deal of challenges still face today when the pure electric vehicle is widely popularized, how to improve user experience is one of main targets for pursuing by competition of a plurality of host plants, and the main targets include how to improve instantaneous acceleration performance (such as overtaking, rapid acceleration, long-distance climbing under special working conditions and the like) of the whole vehicle, how to improve energy recovery efficiency under braking of the whole vehicle, how to improve heat generation and thermal runaway risks of a battery cell when high-power output of the whole vehicle is output and the like, and the great challenges are brought to a battery cell development technology route which pursues ultimate energy density at present. In addition, in the hybrid field (PHEV/HEV/mHEV), especially in the mHEV (48V) and HEV fields which are rapidly popularized in recent years, in order to meet the increasingly stringent carbon emission and fuel consumption standards, the requirements of each host factory on the energy density and the power performance at high and low temperatures of the lithium ion battery are also increasingly stringent, however, the energy density and the power density are not compatible as a pair of spears, the requirements on the development technical capability of the battery are extremely high, and the development and material cost of the battery are also greatly improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the power of a lithium ion cell in the prior art is low, and provides a double-body integrated high-power lithium ion battery to improve the power of the integrated lithium ion cell.
The utility model solves the technical problems through the following technical means: a dual system integrated high power lithium ion battery comprising:
the integrated battery core is formed by a lithium ion battery winding core group and a super capacitor winding core group which are connected in parallel, a plurality of lithium ion winding cores which are connected in parallel form the lithium ion battery winding core group, and a plurality of super capacitor units which are connected in series form the super capacitor winding core group; the super capacitor unit is formed by connecting a plurality of super capacitor winding cores in parallel;
the top cover is arranged at the top of the shell, and a plurality of integrated battery cell positive pole columns and integrated battery cell negative pole columns are arranged at the top of the top cover.
Carry out the series-parallel connection integration inside as independent constitutional unit through lithium ion battery book core group and ultracapacitor system book core group, can reduce the processing manufacturing complexity, reduced the packaging cost, this integrated electric core can compromise lithium ion battery's high energy density and ultracapacitor system's high power performance, can adjust lithium ion battery and ultracapacitor system in addition according to customer's demand and account for the ratio of integrating in inside, improved the suitability of battery.
As a preferred technical scheme, the integrated battery cell is formed by connecting one lithium ion battery winding core group and two serially connected supercapacitor units in parallel, so that the super capacitor winding core group can be protected from being overcharged and over-discharged within the normal use voltage range of the lithium ion battery winding core group, and meanwhile, the capability of large-rate charging and discharging can be maintained.
As preferred technical scheme, the ultracapacitor system unit is rolled up the core and parallelly connected the constitution by two ultracapacitor system, lithium ion rolls up core group and is rolled up the core for a lithium ion, two the ultracapacitor system rolls up the core and sets up side by side, two ultracapacitor system unit and a lithium ion battery roll up the core range upon range of and put, integrated electric core both sides and bottom all are equipped with the fixed sticky tape of termination, roll up the core through ultracapacitor system and set up side by side, and two ultracapacitor system units roll up the core range upon range of with a lithium ion and put, can save the space of arranging of integrated electric core.
As a preferred technical scheme, the number of the positive electrode posts of the integrated battery cell is one, and the number of the negative electrode posts of the integrated battery cell is two.
According to the preferable technical scheme, the number of the positive pole columns of the integrated battery cell is two, and the number of the negative pole columns of the integrated battery cell is one.
As an optimized technical scheme, the positive/negative electrode tabs of the lithium ion battery winding core group are respectively welded with the positive/negative electrode poles of the top cover, and the positive/negative electrode tabs of the supercapacitor winding core group are respectively welded with the positive/negative electrode poles of the integrated battery core of the top cover.
According to the preferable technical scheme, one side of the top cover is provided with an integrated battery cell anode pole and an integrated battery cell cathode pole, and the other integrated battery cell cathode pole is located on the other side of the top cover.
As the preferred technical scheme, a plurality of the super capacitor winding cores all adopt special-shaped lugs, so that the welding between the super capacitor winding cores is facilitated.
As an optimal technical scheme, the positive current collector of the super capacitor roll core and the negative current collector of the super capacitor roll core are both aluminum foils, and compared with copper foils, the aluminum foils are low in use cost and reduce production cost.
The utility model has the advantages that:
(1) according to the utility model, the lithium ion battery winding core group and the super capacitor winding core group are used as independent structural units to be integrated in series and parallel, so that the processing and manufacturing complexity can be reduced, the packaging cost is reduced, the integrated battery core can give consideration to the high energy density of the lithium ion battery and the high power performance of the super capacitor, and the power of the integrated battery core is improved.
(2) According to the utility model, the internal integration ratio of the lithium ion battery and the super capacitor can be adjusted according to the customer requirements, and the applicability of the battery is improved.
Drawings
Fig. 1 is a schematic view of an overall structure of a dual-system integrated high-power lithium ion battery provided by the present invention;
fig. 2 is a schematic diagram of an internal welding structure of an integrated cell of a dual-body integrated high-power lithium ion battery provided by the utility model;
fig. 3 is a schematic structural diagram of an integrated cell equivalent circuit of a dual-system integrated high-power lithium ion battery provided by the utility model;
fig. 4 is a schematic diagram of an internal structure of an integrated cell of a dual-body system integrated high-power lithium ion battery provided by the utility model;
reference numerals: 1. a top cover; 2. integrating a first cathode pole of the battery core; 3. a liquid injection hole; 4. pressure relief protection; 5. a second negative pole of the integrated battery core; 6. integrating the positive pole of the cell; 7. a battery cell two-dimensional identification code; 8. a bar code; 9. a housing; 10. the lithium ion battery winding core group; 1001. a lithium ion battery roll core; 11. terminating the fixing tape; 12. a lithium ion battery winding core group main anode tab; 13. the super capacitor winding core group is provided with a total negative electrode tab; 14. the super capacitor winding core group is provided with a total positive electrode tab; 15. the supercapacitor coil core group; 1501. a supercapacitor cell; 1502. a supercapacitor roll core; 16. connecting the tabs; 17. the lithium ion battery winding core group is provided with a total negative electrode tab; 18. and (6) integrating the battery cell.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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, 2 and 3, a dual-body integrated high-power lithium ion battery includes: the battery comprises a shell 9, a top cover 1, an integrated cell first negative pole post 2, an integrated cell second negative pole post 5, an integrated cell positive pole post 6 and an integrated cell 18 (a lithium ion battery winding core group 10 and a super capacitor winding core group 15 are connected in parallel, and the super capacitor winding core group 15 adopts an N-parallel two-string framework);
in the embodiment, the number of the integrated cell positive pole posts 6 is one, and the number of the integrated cell negative pole posts is two, namely an integrated cell first negative pole post 2 and an integrated cell second negative pole post 5; the integrated battery cell 18 is formed by connecting a lithium ion battery winding core group 10 and two super capacitor units 1501 connected in series in parallel; the integrated cell positive pole column 6, the integrated cell first negative pole column 2 and the integrated cell second negative pole column 5 are all fixed on the top cover 1; the top cover 1 is provided with the liquid injection hole 3 and the pressure relief protection device 4, the lithium ion battery winding core group 10 and the super capacitor winding core group 15 are used as independent structural units to be integrated in parallel, the processing and manufacturing complexity can be reduced, the packaging cost is reduced, the integrated battery cell 18 can give consideration to the high energy density of the lithium ion battery and the high power performance of the super capacitor, the internal integration ratio of the lithium ion battery winding core group 10 and the super capacitor winding core group 15 can be adjusted according to the requirements of customers, and the applicability of the battery is improved;
it should be noted that the second negative electrode post 5 of the integrated battery core and the positive electrode post 6 of the integrated battery core are arranged on the same side of the top cover 1, the first negative electrode post 2 of the integrated battery core is arranged on the other side of the top cover 1, and the capacity proportion and the thickness proportion of the winding core of the lithium ion battery winding core group 10 and the winding core group 15 of the super capacitor can be set according to the requirements of customers;
as shown in fig. 2, 3, and 4, the number of the integrated electric core positive and negative electrode posts is determined according to the requirements of customers, the number of the integrated electric core positive electrode posts 6 can be two, the number of the integrated electric core negative electrode posts is one, the three electrode posts on the top cover 1 can be matched with the integration of two super capacitor units 1501 and a lithium ion battery winding core group 10 which are connected in series inside the casing 9, the voltage range of the super capacitor winding core group 15 is 2.7-5.0V, the voltage range min (2.7-3.0V) -max (4.15V-4.40V) of the lithium ion battery winding core group 10 (ternary) is 2S1P, the super capacitor winding core group 15 can be protected from over-charging and over-discharging within the normal use voltage range of the lithium ion battery winding core group 10, and the charge and discharge capability with large magnification can be maintained;
the lithium ion battery winding core assembly comprises a shell 9, wherein the shell 9 can adopt a single-cavity or double-cavity structure, an integrated battery core 18 consisting of a lithium ion battery winding core assembly 10 and a supercapacitor winding core assembly 15 which are connected in parallel is arranged in the shell 9, and the lithium ion battery winding core assembly 10 is a lithium ion battery winding core 1001; the number of the lithium ion battery winding cores 1001 is set according to actual requirements, or a plurality of lithium ion battery winding cores 1001 arranged in parallel form a lithium ion battery winding core group 10, and two supercapacitor units 1501 arranged in series form a supercapacitor winding core group 15; two supercapacitor winding cores 1502 are arranged side by side, two supercapacitor units 1501 and a lithium ion battery winding core 1001 are stacked, and both sides and the bottom of an integrated battery core 18 are provided with termination fixing adhesive tapes 11 (the termination fixing adhesive tapes 11 are insulating adhesive tapes); the supercapacitor unit 1501 is formed by connecting a plurality of supercapacitor winding cores 1502 in parallel; two super capacitor units 1501 are connected in series, a negative pole tab of one super capacitor unit 1501 is welded and connected with a positive pole tab of the other super capacitor unit 1501 to form a connecting pole tab 16, the connecting pole tab 16 is arranged between the two super capacitor units 1501 which are stacked, insulation protection is well made, the occupied space of the connecting pole tab 16 can be effectively reduced, and therefore the subsequent packaging cost is reduced, a lithium ion battery winding core group total positive pole tab 12 is welded and connected with an integrated battery core positive pole post 6, a lithium ion battery winding core group total negative pole tab 17 is welded and connected with an integrated battery core first negative pole post 2, a super capacitor winding core group total positive pole tab 14 is welded and connected with the integrated battery core positive pole post 6, a super capacitor winding core group total negative pole tab 13 is welded and connected with an integrated battery core second negative pole post 5, a plurality of super capacitor winding cores 1502 are all made of special-shaped pole tabs, welding is convenient; the positive current collector of the super capacitor roll core 1502 and the negative current collector of the super capacitor roll core 1502 are both aluminum foils, so that the use cost is reduced, the positive current collector of the lithium ion battery roll core group 15 is the aluminum foil, and the negative current collector is the copper foil; the manufacturing processes of the lithium ion battery winding core group 10 and the supercapacitor winding core group 15 can adopt a winding process, a lamination process or other processes, the type of the integrated battery cell 18 can be a cylindrical battery, a soft-package battery, a square aluminum shell or a steel shell battery cell, and the embodiment only takes the square aluminum shell battery cell as an example; the positive electrode material of the lithium ion battery roll core 1001 includes but is not limited to the following materials: lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium manganese oxide, lithium iron phosphate, lithium cobalt oxide and the like, and the negative electrode material of the lithium ion battery roll core 1001 comprises the following materials but is not limited to the following materials: natural graphite, artificial graphite, hard carbon, soft carbon, lithium titanate and silicon-based negative electrode materials; the above-mentioned positive electrode material of the supercapacitor core 1502 includes the following materials but is not limited to: lithium metal oxides or phosphates, graphite-like carbon materials, activated carbon, transition metal oxides, and the like; the supercapacitor core 1502 negative electrode materials include, but are not limited to, the following: graphite-based carbon materials, activated carbon, lithium titanium oxide or phosphate, and the like;
as shown in fig. 1, a battery cell two-dimensional identification code 7 and a bar code 8 are bonded to the side surface of a shell 9;
the manufacturing method of the integrated battery cell 18 is as follows:
1) determining the size of the battery, determining the number of positive/negative electrodes, the capacity ratio of the lithium ion battery and the super capacitor and the thickness ratio of the winding core according to the high and low temperature power performance requirements of different customers, and respectively finishing the manufacture of the lithium ion battery winding core group 10 and the super capacitor winding core group 15 in the integrated battery cell 18 according to the conventional manufacturing process of the lithium ion battery and the super capacitor;
2) respectively welding positive and negative electrode tabs of the lithium ion battery winding core group 10 with positive/negative electrode posts of the integrated battery core post; firstly, connecting a plurality of supercapacitor winding cores 1502 in parallel, then connecting the two obtained supercapacitor units 1501 in series, welding positive and negative electrode tabs of the supercapacitor units 1501 between the two super capacitor units 1501 in series, turning the connecting electrode tabs 16 inwards and insulating the connecting electrode tabs, respectively welding a total positive electrode tab and a total negative electrode tab of the supercapacitor winding core group 15 with a positive/negative electrode post of an integrated battery core post, and simultaneously performing insulation protection of the electrode tabs;
3) the lithium ion battery core group 10 and the supercapacitor core winding group 15 are folded inwards to be combined, meanwhile, the integrated battery core 18 is encapsulated and fixed and protected by external insulation, and then subsequent assembly and shell filling are carried out;
4) and carrying out subsequent laser peripheral welding, baking, primary liquid injection, formation, secondary liquid injection, sealing, cleaning and capacity grading on the integrated battery cell 18 according to the subsequent conventional manufacturing process flow of the lithium ion battery, and finally completing all manufacturing procedures of the integrated battery.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A dual system integrated high power lithium ion battery, comprising:
the lithium ion battery winding core assembly comprises a shell (9), wherein an integrated battery core (18) consisting of a lithium ion battery winding core assembly (10) and a super capacitor winding core assembly (15) which are connected in parallel is arranged in the shell (9), a plurality of lithium ion battery winding cores (1001) which are connected in parallel form the lithium ion battery winding core assembly (10), and a plurality of super capacitor units (1501) which are connected in series form the super capacitor winding core assembly (15); the super capacitor unit (1501) is formed by connecting a plurality of super capacitor winding cores (1502) in parallel;
the battery pack is characterized in that the battery pack is provided with a top cover (1) arranged at the top of a shell (9), and the top of the top cover (1) is provided with a plurality of integrated battery cell positive pole posts (6) and integrated battery cell negative pole posts.
2. The two-body integrated high-power lithium ion battery according to claim 1, wherein the integrated cell (18) is composed of one lithium ion battery winding core group (10) and two series-connected supercapacitor units (1501) in parallel.
3. The double-body system integrated high-power lithium ion battery according to claim 2, wherein the supercapacitor unit (1501) is composed of two supercapacitor winding cores (1502) connected in parallel, the lithium ion battery winding core group (10) is a lithium ion battery winding core (1001), the two supercapacitor winding cores (1502) are arranged side by side, the two supercapacitor unit (1501) and the lithium ion battery winding core (1001) are arranged in a stacked manner, and the two sides and the bottom of the integrated battery core (18) are provided with termination fixing adhesive tapes (11).
4. The dual-body integrated high-power lithium ion battery according to claim 1, wherein the number of the integrated cell positive electrode posts (6) is one, and the number of the integrated cell negative electrode posts is two.
5. The dual-body integrated high-power lithium ion battery according to claim 1, wherein the number of the integrated cell positive electrode posts (6) is two, and the number of the integrated cell negative electrode posts is one.
6. The dual-body integrated high-power lithium ion battery according to claim 1, wherein the positive/negative electrode tabs of the lithium ion battery winding core group (10) are respectively welded with the positive/negative electrode posts of the top cover (1), and the positive/negative electrode tabs of the supercapacitor winding core group (15) are respectively welded with the integrated cell positive/negative electrode posts of the top cover (1).
7. The dual-body integrated high-power lithium ion battery according to claim 4, wherein one side of the top cover (1) is provided with an integrated cell positive electrode post (6) and an integrated cell negative electrode post, and the integrated cell negative electrode post connected with the lithium ion battery winding core group (10) is positioned at the other side of the top cover (1).
8. The dual-body integrated high-power lithium ion battery as claimed in claim 1, wherein a plurality of the supercapacitor winding cores (1502) are each provided with a special-shaped tab.
9. The dual-body system integrated high-power lithium ion battery as claimed in claim 1, wherein the positive current collector of the supercapacitor winding core (1502) and the negative current collector of the supercapacitor winding core (1502) are both aluminum foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121908555.8U CN215377638U (en) | 2021-08-13 | 2021-08-13 | High-power lithium ion battery formed by two-body system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121908555.8U CN215377638U (en) | 2021-08-13 | 2021-08-13 | High-power lithium ion battery formed by two-body system |
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| Publication Number | Publication Date |
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| CN215377638U true CN215377638U (en) | 2021-12-31 |
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| CN202121908555.8U Active CN215377638U (en) | 2021-08-13 | 2021-08-13 | High-power lithium ion battery formed by two-body system |
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- 2021-08-13 CN CN202121908555.8U patent/CN215377638U/en active Active
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