CN110311164B - Detachable mixed-form lithium ion battery parallel-connection pressurizing and capacity-increasing battery pack structure - Google Patents
Detachable mixed-form lithium ion battery parallel-connection pressurizing and capacity-increasing battery pack structure Download PDFInfo
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- CN110311164B CN110311164B CN201910423747.0A CN201910423747A CN110311164B CN 110311164 B CN110311164 B CN 110311164B CN 201910423747 A CN201910423747 A CN 201910423747A CN 110311164 B CN110311164 B CN 110311164B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
Abstract
The invention discloses a detachable mixed lithium ion battery parallel connection pressurizing capacity-increasing battery pack structure, which comprises a parallel connection cylindrical battery cell module which is formed by connecting cylindrical battery cells of the same type in parallel and leads out positive and negative wires, a parallel connection square battery cell module which is formed by connecting square battery cells of the same type in parallel and leads out positive and negative wires, and a parallel connection polymer battery cell module which leads out positive and negative wires and is formed by connecting polymer battery cells of the same type in parallel; the parallel cylindrical battery cell module, the parallel square battery cell module and the parallel polymer battery cell module are welded with the protection board through a lead to form a battery pack. The invention not only can realize the changeability of the structure of the battery pack, but also can better exert the battery performance by connecting the battery packs in parallel.
Description
Technical Field
The invention relates to the technical field of consumer lithium ion battery parallel connection pressurizing and capacity increasing battery packs, in particular to a detachable mixed lithium ion battery parallel connection pressurizing and capacity increasing battery pack structure.
Background
When the batteries are connected in series to form a group, the maximum available capacity of the battery group is determined by the capacity and the charge state of the single batteries together, and the inconsistency of the voltage of the single batteries can cause the overcharge or the overdischarge of part of the single batteries; when batteries are connected in parallel to form a group, the current imbalance of the parallel branch circuit is caused by the internal resistance and capacity difference of the branch circuit batteries. The inconsistency in the battery pack will reduce the efficiency of the entire battery pack, and even affect the service life of the battery if not managed properly. Therefore, the performance of the battery pack is not the simple superposition of the performance of the battery monomer, the capacity difference of the two batteries is large, the batteries cannot be connected in series and used in groups, the performance of the batteries can be well exerted by parallel connection and grouping, the capacity utilization rate of the old batteries used in a echelon mode can be effectively improved by reasonably screening the parallel connection and grouping, the total cost of battery investment is reduced, and good economic benefit is realized.
Currently, lithium ion batteries are increasingly used in various portable mobile device fields. For some handheld or portable mobile devices, as the shapes of battery packs required by customers are more and more diversified, and the cost of the battery packs is strictly controlled, batteries of the same batch and the same type are firstly connected in parallel and then connected in series to achieve the capacity and the voltage required by the customers, and the cost is too high in the process of screening the batteries with small capacity difference due to poor consistency of the batteries.
Disclosure of Invention
The invention aims to overcome the technical defects in the prior art, introduces the design of a packaging structure with parallel lithium ion batteries with consistent voltage platforms and different shapes into batteries of handheld or portable mobile equipment, and provides a detachable mixed-shape lithium ion battery parallel connection pressurizing and capacity-increasing battery pack structure with precise packaging, reliable structure, diversified structure, maximized capacity density and lower cost.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a detachable mixed shape lithium ion battery parallel connection pressurization capacity-increasing battery pack structure comprises a parallel connection cylindrical battery cell module 10 which is formed by connecting cylindrical battery cells of the same type in parallel and leads out positive and negative wires, a parallel connection square battery cell module 20 which is formed by connecting square battery cells of the same type in parallel and leads out positive and negative wires, and a parallel connection polymer battery cell module 30 which is formed by connecting polymer battery cells of the same type in parallel and leads out positive and negative wires; the parallel cylindrical cell modules 10, the parallel square cell modules 20 and the parallel polymer cell modules 30 are welded with the protective plate 40 by a wire to form a battery pack.
Compared with the prior art, the invention has the beneficial effects that:
the invention connects and welds the lithium ion batteries with inconsistent shapes and inconsistent capacities, such as cylindrical lithium ion batteries, square lithium ion batteries, polymer lithium ion batteries and the like with consistent voltage platforms in parallel, and then welds the lithium ion batteries with inconsistent capacities with the protection board, and the protection board has a boosting function to form battery packs with different shapes, thereby forming the capacity-increased and boosted battery pack.
The invention can make the battery structure compact and diversified by using the packaging structure of the invention, and achieve the capacity density maximization and the powerful guarantee of the structural reliability of the battery, and the cost is lower.
Drawings
FIG. 1 is a schematic diagram of a package structure of a detachable hybrid lithium ion battery parallel connection boosting and capacity-increasing battery pack structure;
fig. 2A to 2E are schematic structural diagrams of parallel cylindrical cell modules, respectively;
fig. 3A to 3D are schematic diagrams of parallel square cell module structures, respectively;
fig. 4A-4D are schematic structural diagrams of polymer cell modules connected in parallel, respectively;
fig. 5 is a schematic diagram of stacking of parallel cylindrical cell modules, parallel square cell modules, and parallel polymer cell modules and combining with a protection board;
fig. 6A-6B are schematic diagrams of a housing and an exploded view of a battery pack, respectively.
In the figure:
10-parallel cylindrical cell modules;
1001-cylindrical electrical core; 1002-connecting the positive electrode of the cylindrical battery cell with a nickel sheet in parallel; 1003-connecting a cathode of the cylindrical battery cell with a nickel sheet in parallel; 1004, leading out a lead from the positive electrode of the parallel cylindrical battery cell module; 1005-leading out a lead from the negative electrode of the parallel cylindrical battery cell module;
20, connecting square battery cell modules in parallel;
2001-square cell; 2002-negative electrode cap; 2003, wrapping the adhesive tape completely; 2004-double sided adhesive tape; 2005-outer gasket; 2006 — secondary protection PTC;
2007-connecting a nickel sheet in parallel with the negative electrode of the battery cell; 2008, connecting the positive electrode of the battery cell with a nickel sheet in parallel;
2009-leading out a lead from the positive electrode of the parallel square battery cell module;
2010, leading out a lead from the negative electrode of the parallel square battery cell module;
30-parallel polymer cell modules;
3001-polymer cells;
3002 wrapping side and bottom edges with insulating tapes; 3003-cell positive tab; 3004-cell negative electrode tab; 3005-grooved tape; 3006-secondary protection of TCO; 3007 insulating hard board;
3008 connecting the positive electrode of polymer cell with nickel plate;
3009 connecting the positive electrode of polymer cell with nickel plate;
3010-lead out the positive pole of the parallel polymer electric core module;
3011-lead out the positive pole of the parallel polymer electric core module;
40-a protective plate;
50-highland barley paper;
60-buffer foam;
70-plastic top shell;
80-a plastic bottom shell;
90-stainless steel shell.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a detachable mixed form consumer lithium ion battery parallel connection pressurizing capacity-increasing battery pack structure, which is characterized in that cylindrical lithium ion batteries, square lithium ion batteries, polymer lithium ion batteries and other lithium ion batteries with consistent voltage platforms are welded in parallel and then welded with a protection plate to form a battery cell module, highland barley paper, buffering foam and a shell are assembled on the welded battery cell module, the shell consists of a plastic top shell, a plastic bottom shell and a stainless steel shell, the head and the tail of the battery are respectively wrapped by the highland barley paper, and then the buffering foam is pasted to enable the battery pack to have a buffering function in the shell, so that a detachable finished product battery is manufactured.
As shown in fig. 1, the detachable hybrid lithium ion battery parallel connection boosting and capacity increasing battery pack structure includes a parallel connection cylindrical cell module 10 formed by parallel connection of cylindrical cells of the same type and leading out positive and negative wires, a parallel connection square cell module 20 formed by parallel connection of square cells of the same type and leading out positive and negative wires, and a parallel connection polymer cell module 30 formed by parallel connection of polymer cells of the same type and leading out positive and negative wires; the parallel cylindrical cell modules 10, the parallel square cell modules 20 and the parallel polymer cell modules 30 are welded with the protection plate 40 through a lead to form a battery pack.
As shown in fig. 2A to 2E, each cylindrical cell 1001 in the parallel cylindrical cell module 10 is pasted with glue to form a desired shape, the positive electrode of each cylindrical cell needs to be resistance-welded by a cylindrical cell positive electrode parallel nickel sheet 1002, the negative electrode of each cylindrical cell needs to be resistance-welded by a circular cell negative electrode parallel nickel sheet 1003, and then a positive electrode lead-out wire 1004 and a negative electrode lead-out wire 1005 of the parallel cylindrical cell module 10 are led out by soldering.
As shown in fig. 3A to 3D, in the parallel square cell module 20, since the polarities of the square cell 2001 except the negative electrode cap 2002 are negative and the polarities of the other parts are positive, therefore, the positive electrode part of the square battery cell is completely wrapped by the full wrapping adhesive tape 2003, and then each square battery cell is stuck into a required shape by the double-sided adhesive tape 2004, an outer gasket 2005 is stuck on the negative cap 2002 of each square battery cell, then a secondary protection PTC2006 is stuck on the outer gasket, the negative end of the secondary protection PTC2006 is tightly stuck on the negative cap 2002, then the negative pole of the square battery cell is welded with 1 secondary protection PTC2006 in a resistance way, then the negative electrode of each square battery cell led out by the secondary protection PTC2006 is welded with the square battery cell negative electrode parallel nickel sheet 2007 by resistance welding, the positive electrode of each square battery cell is welded by the square battery cell positive electrode parallel nickel sheet 2008 by resistance welding, and then, a positive electrode lead-out lead wire 2009 and a negative electrode lead-out lead wire 2010 of the square battery cell module (20) which are connected in parallel are led out through soldering.
As shown in fig. 4A to 4D, an insulating tape 3002 is wrapped around the side edge and the bottom edge of each polymer cell 3001 in the parallel polymer cell module 30, a groove tape 3005 is wrapped around the space between the positive electrode tab 3003 and the negative electrode tab 3004 of each polymer cell 3001, a secondary protection TCO3006 is welded to the positive electrode of each polymer cell, an insulating hard plate 3007 with a hole is then inserted into the lead-out end of the TCO3006 and the negative electrode tab 3004 of each polymer cell, the lead-out end of the TCO3006 and the positive electrode parallel nickel plate 3008 of each polymer cell, the negative electrode tab 3004 and the negative electrode parallel nickel plate 3009 of each polymer cell are then welded by laser welding, and the positive lead-out lead 3010 and the negative lead-out lead 3011 of the parallel polymer cell module (30) are then led out by soldering.
As shown in fig. 5, the positive lead-out wires 1004 of the parallel cylindrical cell modules 10 are welded to the positive lead-out wires 2009 of the parallel square cell modules 20, then welded to the positive lead-out wires 3010 of the parallel polymer cell modules 30, and then welded to the positive electrode of the protective plate 40; the negative lead-out wire 1005 of the parallel cylindrical cell module 10 is welded to the negative lead-out wire 2010 of the parallel square cell module 20, then welded to the negative lead-out wire 3011 of the parallel polymer cell module 30, and then welded to the negative electrode of the protective plate 40;
as shown in fig. 1 and 6A-6B, the highland barley paper 50 and the buffer foam 60 are assembled on the head, the tail and the side of the battery pack, then the plastic top shell 70 and the bottom shell 80 are respectively used on the head and the tail of the battery pack, and the stainless steel shell 90 is fastened on the main body of the battery pack, so that the detachable pressurizing capacity-increasing battery pack structure is manufactured, and finally the finished battery is formed.
The protection board 40 may be composed of a charging module, a discharging module, a heat dissipation module, and a voltage boosting module, and is a structure of a protection board for a conventional battery, which will not be described in detail.
In summary, the detachable hybrid consumer lithium ion battery parallel connection boosting and capacity increasing battery pack structure provided by the invention not only can realize the changeability of the battery pack structure by connecting the lithium ion batteries in different forms in parallel, but also can not be connected in series for group application due to the difference of the capacities of the different batteries, can better exert the battery performance by connecting in parallel for group, can effectively improve the capacity utilization rate of the batteries used in a gradient manner, reduce the total cost of battery investment, realize good economic benefit, and the designed protection board has a boosting function, so that the battery cells in different forms are connected in parallel to achieve the effect of increasing capacity and increasing pressure, thereby being beneficial to improving the market application prospect of the products of battery manufacturers and having great production practice significance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A detachable mixed-form lithium ion battery parallel-connection pressurizing capacity-increasing battery pack structure is characterized by comprising a parallel-connection cylindrical battery cell module (10) which is formed by connecting cylindrical battery cells (1001) of the same type in parallel and leads out positive and negative wires, a parallel-connection square battery cell module (20) which is formed by connecting square battery cells (2001) of the same type in parallel and leads out positive and negative wires, and a parallel-connection polymer battery cell module (30) which is formed by connecting polymer battery cells (3001) of the same type in parallel and leads out positive and negative wires; the voltage platforms of the cylindrical battery cell, the square battery cell and the polymer battery cell are consistent, and the parallel cylindrical battery cell module (10), the parallel square battery cell module (20) and the parallel polymer battery cell module (30) are welded in parallel and then welded with the protection board (40) through a lead to form a battery pack.
2. The detachable mixed-form lithium ion battery parallel connection pressurizing and capacity increasing battery pack structure as claimed in claim 1, wherein the positive electrode of each cylindrical cell (1001) in the parallel cylindrical cell module (10) is resistance-welded through a cylindrical cell positive electrode parallel connection nickel sheet (1002), the negative electrode of each cylindrical cell is resistance-welded through a circular cell negative electrode parallel connection nickel sheet (1003), and a positive electrode lead-out wire (1004) and a negative electrode lead-out wire (1005) of the parallel cylindrical cell module (10) are led out through soldering.
3. The detachable mixed-form lithium ion battery parallel connection pressurization and capacity increase battery pack structure as claimed in claim 2, the parallel square battery cell module (20) is characterized in that the positive pole of each square battery cell (2001) is completely wrapped by a full wrapping adhesive tape (2003), an outer gasket (2005) is pasted on the negative pole cap (2002) of each square battery cell (2001), a secondary protection PTC (2006) is pasted on the outer gasket, the negative pole end of the secondary protection PTC (2006) is tightly attached to the negative pole cap (2002), the negative pole of each square battery cell is in resistance welding with one secondary protection PTC (2006), the negative pole of each square battery cell (2001) led out by the secondary protection PTC (2006) and a square battery cell negative pole parallel nickel sheet (2007) are in resistance welding, the positive pole of each square battery cell is in resistance welding with a square battery cell positive pole parallel nickel sheet (2008), and a positive electrode lead-out lead wire (2009) and a negative electrode lead-out lead wire (2010) of the square battery cell module (20) which are connected in parallel are led out through tin soldering.
4. The detachable mixed-form lithium ion battery parallel connection pressurization and capacity increase battery pack structure as claimed in claim 3, the parallel connection type polymer battery cell module is characterized in that an insulating adhesive tape (3002) is wrapped on the side edge and the bottom edge of each polymer battery cell (3001) in the parallel connection type polymer battery cell module (30), a groove adhesive tape (3005) is wrapped between a positive electrode lug (3003) and a negative electrode lug (3004) of each polymer battery cell, a secondary protection TCO (3006) is welded on the positive electrode of each polymer battery cell, an insulating hard plate (3007) with a hole is inserted at the leading-out end of the secondary protection TCO (3006) and the negative electrode lug (3004) end of each polymer battery cell, the leading-out end of the secondary protection TCO (3006) is welded with a nickel sheet (3008) connected in parallel with the positive electrode of each polymer battery cell, the negative electrode lug (3004) is welded with a nickel sheet (3009) connected in parallel with the negative electrode of each polymer battery cell through laser welding, and a positive electrode lead-out lead (3010) and a negative electrode lead-out lead (3011) of the parallel polymer battery cell module (30) are led out through tin soldering.
5. The detachable mixed-form lithium ion battery parallel connection pressurizing capacity-increasing battery pack structure as claimed in claim 1, wherein the positive and negative poles of the protection plate (40) are connected with the positive and negative poles of the parallel cylindrical cell module (10), the parallel square cell module (20) and the parallel polymer cell module (30) by soldering.
6. The detachable mixed-form lithium ion battery parallel connection pressurizing and capacity increasing battery pack structure of claim 4, wherein the capacities of the cylindrical battery cell (1001), the square battery cell (2001) and the polymer battery cell (3001) are the same or different.
7. The detachable mixed-form lithium ion battery parallel connection pressurizing and capacity increasing battery pack structure as claimed in claim 1, wherein the head, tail and side edges of the battery pack are respectively assembled with highland barley paper (50) and buffer foam (60).
8. The detachable mixed lithium ion battery parallel connection pressurizing and capacity increasing battery pack structure as claimed in claim 7, wherein the head and the tail of the battery pack are respectively provided with a plastic top shell (70) and a plastic bottom shell (80), and the main body of the battery pack is buckled with a stainless steel shell (90).
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| CN201910423747.0A CN110311164B (en) | 2019-05-21 | 2019-05-21 | Detachable mixed-form lithium ion battery parallel-connection pressurizing and capacity-increasing battery pack structure |
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| CN110311164B true CN110311164B (en) | 2022-06-10 |
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| CN111525057B (en) * | 2020-03-20 | 2022-09-06 | 天津力神电池股份有限公司 | Circular soft-packaged polymer lithium ion battery and assembly method |
| CN216872055U (en) * | 2021-08-30 | 2022-07-01 | 陕西奥林波斯电力能源有限责任公司 | High-capacity lithium ion battery and simple battery cell |
| CN115832591B (en) * | 2021-10-21 | 2024-03-26 | 宁德时代新能源科技股份有限公司 | Battery pack and electricity utilization device |
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| JP2000294270A (en) * | 1999-04-12 | 2000-10-20 | Toshiba Battery Co Ltd | Manufacture of rectangular alkali secondary battery |
| CN105428581B (en) * | 2015-11-27 | 2017-11-14 | 上海航天电源技术有限责任公司 | The lithium ionic cell module and its switching method of a kind of switching regulator |
| CN111063853A (en) * | 2019-11-07 | 2020-04-24 | 华富(江苏)锂电新技术有限公司 | Device for realizing convergence of multiple cylindrical lithium ion batteries |
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Effective date of registration: 20230202 Address after: 300000 No.38 Haitai South Road, Huayuan Industrial Zone (outside the ring), High-tech Zone, Binhai New Area, Tianjin Patentee after: Tianjin Juyuan New Energy Technology Co.,Ltd. Address before: No.38, South Haitai Road, Binhai high tech Industrial Development Zone, Binhai New Area, Tianjin Patentee before: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. |