CN117895174A - Lithium ion battery module assembly structure - Google Patents
Lithium ion battery module assembly structure Download PDFInfo
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- CN117895174A CN117895174A CN202410075317.5A CN202410075317A CN117895174A CN 117895174 A CN117895174 A CN 117895174A CN 202410075317 A CN202410075317 A CN 202410075317A CN 117895174 A CN117895174 A CN 117895174A
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- current collector
- battery
- assembly
- fixing frame
- module
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 43
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000005452 bending Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 10
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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
-
- 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
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a lithium ion battery module assembly structure, which comprises a box body, a plurality of lithium ion battery cores, a heat conducting medium, a battery core fixing frame, a current collector fixing frame, a module current collector, an assembly current collector and an insulating medium, wherein the box body is provided with a plurality of lithium ion battery cores; a plurality of lithium ion batteries are stacked and fixed into a battery core assembly in a battery core fixing frame in the box body; the positive electrode lugs and the negative electrode lugs of adjacent layers of battery cells in the battery cell assembly are connected in series to form a series structure, the adjacent layers of lithium ion battery cells are separated by a heat conducting medium, and the series parts of the battery cells at the positive electrode lug and the negative electrode lug are fixed into a whole by a module current collector; leading out a total positive electrode and a total negative electrode of the battery module from the starting end and the tail end of the tab series structure through the assembly current collector; the module current collector and the assembly current collector are limited in the current collector fixing frame; the invention has the advantages of convenient assembly, smaller overall volume, lighter weight, higher energy density, excellent heat resistance and impact resistance, and suitability for being applied to various fields of traffic, aviation and the like.
Description
The scheme is a divisional application taking an invention patent with a filing date of 2018, 05 and 25 months, a filing number of 2018105189412 and a name of 'large-sized parallel-connection-free lithium ion battery module assembly structure' as a parent application.
Technical Field
The invention relates to the technical field of battery power sources, in particular to a lithium ion battery module assembly structure.
Background
Energy is the biggest difficult problem and dilemma facing the 21 st century, and sustainable development of energy is one of important guarantees for sustainable development of society and economy. Lithium ion batteries, which are representative of modern high-performance batteries, have the advantages of high working voltage, large specific energy, stable discharge voltage, wide application temperature range, light environmental pollution, long storage and working life and the like, and have become the main current power supply of many electronic products. Moreover, lithium ion batteries have received much attention in the field of large power sources such as electric vehicles and UPS.
At present, a plurality of small-capacity lithium ion batteries are connected in parallel or in series-parallel to obtain large capacity so as to meet the requirement of a large-scale power source. However, the battery module has a plurality of defects, the parallel battery module has high requirement on the consistency of the battery cells, the whole battery module is influenced by the performance of a single battery cell, and the parallel battery module is not suitable for the existing battery management system. Therefore, the large-sized non-parallel lithium ion battery module can solve the problems of parallel connection and series-parallel connection to a certain extent, and the number of small cells can be reduced by connecting large-capacity lithium ion batteries in series so as to reduce the cost of the whole battery pack.
Disclosure of Invention
The lithium ion battery module assembly structure provided by the invention is convenient to assemble, has smaller overall volume and lighter weight, has higher energy density and excellent heat resistance and impact resistance, and is suitable for being applied to various fields such as traffic, aviation and the like.
The invention adopts the following technical scheme.
The lithium ion battery module assembly structure comprises a box body, a plurality of lithium ion battery cores, a heat conducting medium, a battery core fixing frame, a current collector fixing frame, a module current collector, an assembly current collector and an insulating medium;
The box body is an external fixing structure with a waterproof function of the battery module, and an insulating medium is arranged on the inner wall of the box body;
The lithium ion battery cores are stacked into a battery core assembly in a battery core fixing frame in the box body, and the battery core assembly is fixed by the battery core fixing frame; the positive electrode lugs and the negative electrode lugs of the adjacent lithium ion battery cells in the battery cell assembly are connected in series to form a series structure, the adjacent lithium ion battery cells are separated by a heat conducting medium, and the series parts of the battery cells at the positive electrode lug and the negative electrode lug are connected and fixed into a whole by a module current collector; the upper layer and the lower layer of the module current collector in the cell assembly are separated by an insulating medium;
The initial end and the tail end of the tab serial structure in the cell assembly are led out of the total positive electrode and the total negative electrode of the battery module through the assembly current collector, and the module current collector and the assembly current collector are limited in a current collector fixing frame provided with a current collector limiting card.
And the box body is provided with a plug connector hole, and the total positive electrode and the total negative electrode are respectively connected with a positive plug connector and a negative plug connector on the box body.
The battery cell assembly comprises a battery cell assembly body, wherein the battery cell assembly body is characterized in that two battery cell lugs are arranged in the battery cell assembly body, hole sites are formed in the battery cell assembly body, the two battery cell lugs of the uppermost battery cell are bent downwards, the two battery cell lugs of the lowermost battery cell are bent upwards, one battery cell lug of each middle battery cell is bent upwards, and the other battery cell lug of each middle battery cell is bent downwards.
And a current collector limiting clamp is arranged at the current collector fixing frame.
An insulating medium is arranged between the battery cell fixing frame and the battery cell, and the battery cell fixing frame comprises a plurality of battery cell fixing frame fixing ends fixed at the box body and a locking frame connected with each fixing end; the fixed end of the cell fixing frame is connected with the box body; after all the electric cores are installed in the electric core fixing frame, the locking frame and the fixing end are connected and fixed by a fastener or a welding process.
The module current collector clamps and fixes the serial connection part of each cell at the positive electrode lug and the negative electrode lug by the inner layer current collector and the outer layer current collector.
The assembly structure further comprises an automatic fire extinguishing device, a fuse, a battery management module and a thermal management module.
The box body is formed by one or more of aluminum alloy, magnesium aluminum alloy, stainless steel and carbon fiber;
The insulating medium is formed by one or more of a polymer insulating medium and a glass fiber insulating medium;
The battery cell fixing frame is formed by one or more of aluminum alloy, magnesium aluminum alloy, stainless steel, carbon fiber and high polymer materials;
the current collector fixing frame is formed by one or more of carbon fiber and high polymer materials;
The heat conducting medium is formed by one or more of graphite heat conducting medium, carbon fiber heat conducting medium, graphene heat conducting medium, carbon nano tube heat conducting medium and macromolecule heat conducting medium;
The module current collector is formed by one or more of an aluminum plate, a copper plate and a stainless steel plate; the assembly current collector is formed by one or more of an aluminum plate and a copper plate.
The production steps of the assembly structure sequentially comprise the following steps of;
A. Fixing an insulating medium on the inner side of the box body, and fixing a current collector fixing frame and a fixing end of a battery cell fixing frame;
B. shaping, cutting, punching and bending the tab of the lithium ion battery core;
C. Stacking the battery cells processed by the electrode lugs at a battery cell fixing frame, and connecting the electrode lugs of each battery cell according to a serial circuit structure; in the stacking operation, besides the first battery core, other battery cores are required to be placed in a module current collector and a plate-shaped insulating medium in advance before being stacked, and the vertical faces of adjacent lugs among the battery cores are attached during stacking; until the required cell assembly is achieved;
D. The electrode lugs in the cell assembly are fixed by the module current collectors and are connected with a low-voltage wire harness, and the current collectors are separated by an insulating medium;
E. Fixing the anode and the cathode of a series circuit structure in the cell assembly by using an assembly current collector, and connecting a low-voltage wire harness;
F. Fixing the fixed ends of the current collector fixing frame and the battery core fixing frame with the corresponding locking frames;
G. arranging the wire harness, and installing a plug connector at the box body; connecting the plug connector with the anode and the cathode of the battery cell assembly;
H. other accessories are installed.
The invention has the beneficial effects that:
The invention provides a lithium ion battery module assembly structure, which combines the battery modules in a full series mode, avoids a series of problems of small-capacity parallel connection, series-parallel connection batteries and the like under the traditional structure, and can monitor the voltage and the current of each battery core in real time when the battery core works.
According to the invention, on the conductor layout structure, each current collector is separated by an insulating medium, so that the safety performance is improved to a certain extent; and the total positive electrode and the total negative electrode are respectively connected with the positive and negative electrode connectors on the box body through soft connection, so that the safety problems of pulling the tab and the like caused by hard connection are avoided.
Compared with the existing battery cell module, the module designed by the invention reduces unnecessary materials in a certain range, so that the whole battery module has lighter weight. The large-sized non-parallel lithium ion battery module is convenient to assemble, has higher energy density and excellent heat resistance and impact resistance, and is suitable for being applied to various fields such as traffic, aviation and the like.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is an internal schematic view of the present invention;
FIG. 2 is an external schematic view of the present invention;
FIG. 3 is a schematic diagram of a cell stack according to the present invention;
FIG. 4 is a schematic view of the connection and fixation of tabs of adjacent cells according to the present invention;
In the figure: 1-a box body; 2-lithium ion battery core; 3-a heat conducting medium; 4-a battery cell fixing frame; 4A-fixed end of the cell fixing frame; 4B-locking frame of the cell fixing frame; 5-a current collector fixing frame; 6-module current collector; 6A-an inner layer current collector of the module current collector; 6B-an outer layer current collector of the module current collector; 7-an assembly current collector; 8-an insulating medium; 9-an automatic fire extinguishing device; 10-fuses; 11-positive and negative pole connectors; 12-plug connector holes;
101-a battery cell positive electrode lug; 102-cell cathode tab
Detailed Description
As shown in fig. 1-4, the lithium ion battery module assembly structure comprises a box body 1, a plurality of lithium ion battery cores 2, a heat conducting medium 3, a battery core fixing frame 4, a current collector fixing frame 5, a module current collector 6, an assembly current collector 7 and an insulating medium 8;
The box body is an external fixing structure with a waterproof function of the battery module, and an insulating medium is arranged on the inner wall of the box body;
The lithium ion battery cores are stacked into a battery core assembly in a battery core fixing frame in the box body, and the battery core assembly is fixed by the battery core fixing frame; the positive electrode lugs and the negative electrode lugs of the adjacent lithium ion battery cells in the battery cell assembly are connected in series to form a series structure, the adjacent lithium ion battery cells are separated by a heat conducting medium, and the series parts of the battery cells at the positive electrode lug and the negative electrode lug are connected and fixed into a whole by a module current collector; the upper layer and the lower layer of the module current collector in the cell assembly are separated by an insulating medium;
The initial end and the tail end of the tab serial structure in the cell assembly are led out of the total positive electrode and the total negative electrode of the battery module through the assembly current collector, and the module current collector and the assembly current collector are limited in a current collector fixing frame provided with a current collector limiting card.
The box body is provided with a plug connector hole 12, and the total positive electrode and the total negative electrode are respectively connected with a positive plug connector 11 and a negative plug connector 11 on the box body.
The battery cell assembly comprises a battery cell assembly body, wherein the battery cell assembly body is characterized in that two battery cell lugs are arranged in the battery cell assembly body, hole sites are formed in the battery cell assembly body, the two battery cell lugs of the uppermost battery cell are bent downwards, the two battery cell lugs of the lowermost battery cell are bent upwards, one battery cell lug of each middle battery cell is bent upwards, and the other battery cell lug of each middle battery cell is bent downwards.
And a current collector limiting clamp is arranged at the current collector fixing frame.
An insulating medium is arranged between the battery cell fixing frame and the battery cell, and the battery cell fixing frame comprises a plurality of battery cell fixing frame fixing ends 4A fixed at the box body and a locking frame 4B connected with each fixing end 4A; the fixed end 4A of the cell fixing frame is connected with the box body; after all the electric cores are installed in the electric core fixing frame, the locking frame and the fixing end are connected and fixed by a fastener or a welding process.
The module current collector clamps and fixes the serial connection part of each cell at the positive electrode lug and the negative electrode lug by the inner layer current collector 6A and the outer layer current collector 6B.
The assembly structure further comprises an automatic fire extinguishing device 9, a fuse 10, a battery management module and a thermal management module.
The box body is formed by one or more of aluminum alloy, magnesium aluminum alloy, stainless steel and carbon fiber;
The insulating medium is formed by one or more of a polymer insulating medium and a glass fiber insulating medium;
The battery cell fixing frame is formed by one or more of aluminum alloy, magnesium aluminum alloy, stainless steel, carbon fiber and high polymer materials;
the current collector fixing frame is formed by one or more of carbon fiber and high polymer materials;
The heat conducting medium is formed by one or more of graphite heat conducting medium, carbon fiber heat conducting medium, graphene heat conducting medium, carbon nano tube heat conducting medium and macromolecule heat conducting medium;
The module current collector is formed by one or more of an aluminum plate, a copper plate and a stainless steel plate; the assembly current collector is formed by one or more of an aluminum plate and a copper plate.
The production steps of the assembly structure sequentially comprise the following steps of;
A. Fixing an insulating medium on the inner side of the box body, and fixing a current collector fixing frame and a fixing end of a battery cell fixing frame;
B. shaping, cutting, punching and bending the tab of the lithium ion battery core;
C. Stacking the battery cells processed by the electrode lugs at a battery cell fixing frame, and connecting the electrode lugs of each battery cell according to a serial circuit structure; in the stacking operation, besides the first battery core, other battery cores are required to be placed in a module current collector and a plate-shaped insulating medium in advance before being stacked, and the vertical faces of adjacent lugs among the battery cores are attached during stacking; until the required cell assembly is achieved;
D. The electrode lugs in the cell assembly are fixed by the module current collectors and are connected with a low-voltage wire harness, and the current collectors are separated by an insulating medium;
E. Fixing the anode and the cathode of a series circuit structure in the cell assembly by using an assembly current collector, and connecting a low-voltage wire harness;
F. Fixing the fixed ends of the current collector fixing frame and the battery core fixing frame with the corresponding locking frames;
G. arranging the wire harness, and installing a plug connector at the box body; connecting the plug connector with the anode and the cathode of the battery cell assembly;
H. other accessories are installed.
Specific example 1:
A large-scale lithium ion battery module without parallel connection comprises the following components: the battery management system comprises a box body, a frame, a plurality of lithium ion battery cores, an insulating medium, a current collector, a total positive total negative current collector, a heat conducting medium, connectors, a battery management system, an automatic fire extinguishing device and a thermal management system.
The box body is made of aluminum alloy, an epoxy resin plate is attached to the inner side of the box body, and connector holes are formed in the box body.
The frame is divided into two types, one type is a battery cell fixing frame, and the frame is made of aluminum alloy. One type is a current collector fixing frame which is made of ABS plastic, and a current collector limiting clamp is arranged on the current collector fixing frame.
12 500AH single high-capacity lithium ion battery cells are connected in series, the lithium ion battery cells are provided with anode and cathode lugs, an aluminum-plastic composite packaging film is arranged on the outer sides of the battery cells, and a high-polymer heat-conducting medium is attached to each battery cell.
Bending the positive and negative electrode lugs in a certain sequence, placing all the positive and negative electrodes of the 1 st cell in the frame upwards, and leading out a total negative electrode by utilizing a total negative current collector; the negative electrode of the 2 nd electric core is bent upwards, the positive electrode is bent downwards, the 2 nd electric core is placed on the 1 st electric core after being turned over, the negative electrode of the 2 nd electric core is contacted with the positive electrode of the 1 st electric core, and the vertical surfaces of the lug plates are mutually attached. The negative electrode of the 3 rd battery cell is bent downwards, the positive electrode is bent upwards, the battery cell is directly placed on the 2 nd battery cell, the negative electrode of the battery cell is contacted with the positive electrode of the 2 nd battery cell, and the like. The positive electrode and the negative electrode of the 12 th cell are all bent upwards, are turned over and are placed on the 11 th cell, the negative electrode of the 12 th cell is contacted with the positive electrode of the 11 th cell, and the total positive electrode is led out by the total positive current collector. The total positive current collector and the total negative current collector are silver-plated copper plates. The total positive electrode and the total negative electrode are respectively connected with the positive and negative electrode connectors on the box body through flexible connection.
All the lugs contacted with each other are fixed together by utilizing a current collector in a bolt mode, and the current collector is an aluminum plate and is limited in a current collector fixing frame.
The two current collectors are separated by an epoxy resin plate.
The current collector is connected with the lead and is connected with the battery management system, the thermal management system and the like, and the battery management system, the thermal management system and the automatic fire extinguishing device are placed in the box body.
The large-sized non-parallel lithium ion battery module adopts a full-series assembly method, so that the problems of parallel connection and series-parallel connection of the current small-capacity batteries are avoided, and the module has smaller overall volume and lighter weight, higher energy density and excellent heat resistance and impact resistance. Moreover, the large-sized non-parallel lithium ion battery module can monitor the temperature and voltage change of each electric core in the battery pack in real time, is provided with an automatic fire extinguishing device, ensures the reliability and safety of the whole battery module, and can be widely applied to various fields.
It should be understood that the examples described above are only illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications of the invention will become apparent to those skilled in the art upon reading the description herein, and such equivalents are intended to fall within the scope of the invention as defined by the appended claims.
Claims (2)
1. Lithium ion battery module package assembly, its characterized in that: the module assembly structure comprises a box body (1), a plurality of lithium ion battery cores (2), a heat conducting medium (3), a battery core fixing frame (4), a current collector fixing frame (5), a module current collector (6), an assembly current collector (7) and an insulating medium (8);
The box body is an external fixing structure with a waterproof function of the battery module, and an insulating medium is arranged on the inner wall of the box body;
The lithium ion battery cores are stacked into a battery core assembly in a battery core fixing frame in the box body, and the battery core assembly is fixed by the battery core fixing frame;
the positive electrode lugs and the negative electrode lugs of the adjacent lithium ion battery cells in the battery cell assembly are connected in series to form a series structure, the adjacent lithium ion battery cells are separated by a heat conducting medium, and the series parts of the battery cells at the positive electrode lug and the negative electrode lug are connected and fixed into a whole by a module current collector;
The module current collectors of adjacent layers in the cell assembly are separated by insulating medium;
Leading out a total positive electrode and a total negative electrode of a battery module from the starting end and the tail end of a tab serial structure in the battery cell assembly through an assembly current collector, wherein the assembly current collector and the module current collector are limited in a current collector fixing frame provided with a current collector limiting card;
The box body is provided with a plug connector hole (12), and the total positive electrode and the total negative electrode are respectively connected with a positive and negative electrode plug connector (11) on the box body;
the two lugs of the battery cells in the battery cell combination body are provided with hole sites, the two lugs of the battery cell at the uppermost layer are folded downwards, the two lugs of the battery cell at the lowermost layer are folded upwards, one lug of each battery cell at the middle layer is folded upwards, and the other lug is folded downwards;
The module current collector clamps and fixes the serial connection part of each battery core at the positive electrode lug and the negative electrode lug by the inner layer current collector (6A) and the outer layer current collector (6B);
An insulating medium is arranged between the battery cell fixing frame and the battery cell, and the battery cell fixing frame comprises a plurality of battery cell fixing frame fixing ends (4A) fixed at the box body and a locking frame (4B) connected with each fixing end (4A); the fixed end (4A) of the cell fixing frame is connected with the box body; when all the electric cores are arranged in the electric core fixing frame, the locking frame is connected with the fixing end.
2. The lithium ion battery module assembly structure according to claim 1, wherein: the production steps of the assembly structure sequentially comprise the following steps of;
A. Fixing an insulating medium on the inner side of the box body, and fixing a current collector fixing frame and a fixing end of a battery cell fixing frame;
B. shaping, cutting, punching and bending the tab of the lithium ion battery core;
C. Stacking the battery cells processed by the electrode lugs at a battery cell fixing frame, and connecting the electrode lugs of each battery cell according to a serial circuit structure; in the stacking operation, besides the first battery core, other battery cores are required to be placed in a module current collector and a plate-shaped insulating medium in advance before being stacked, and the vertical faces of adjacent lugs among the battery cores are attached during stacking; until the required cell assembly is achieved;
D. The electrode lugs in the cell assembly are fixed by the module current collectors and are connected with a low-voltage wire harness, and the current collectors are separated by an insulating medium;
E. Fixing the anode and the cathode of a series circuit structure in the cell assembly by using an assembly current collector, and connecting a low-voltage wire harness;
F. Fixing the fixed ends of the current collector fixing frame and the battery core fixing frame with the corresponding locking frames;
G. arranging the wire harness, and installing a plug connector at the box body; connecting the plug connector with the anode and the cathode of the battery cell assembly;
H. other accessories are installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410075317.5A CN117895174A (en) | 2018-05-25 | 2018-05-25 | Lithium ion battery module assembly structure |
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| CN201810518941.2A CN108777271B (en) | 2018-05-25 | 2018-05-25 | Large-sized parallel-connection-free lithium ion battery module assembly structure |
| CN202410075317.5A CN117895174A (en) | 2018-05-25 | 2018-05-25 | Lithium ion battery module assembly structure |
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| KR20240004355A (en) | 2021-03-31 | 2024-01-11 | 에노빅스 코오퍼레이션 | Electrode assembly including current limiter, secondary battery having such electrode assembly, and test method |
| CN115036651A (en) * | 2022-06-28 | 2022-09-09 | 海口安博尔能源技术开发有限公司 | Lithium ion battery energy storage system for industrial-grade water hydrogen production |
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| JP2005197015A (en) * | 2003-12-26 | 2005-07-21 | Nissan Motor Co Ltd | Battery pack |
| CN100547848C (en) * | 2005-12-23 | 2009-10-07 | 深圳市比克电池有限公司 | Winding type soft package lithium ion battery and preparation method thereof |
| CN102623746A (en) * | 2012-03-26 | 2012-08-01 | 宁德新能源科技有限公司 | Flexibly-packaged lithium ion battery |
| CN105470440B (en) * | 2016-02-02 | 2019-01-22 | 北方奥钛纳米技术有限公司 | A kind of battery modules and its glue injection method |
| CN206293555U (en) * | 2016-12-06 | 2017-06-30 | 齐齐哈尔工程学院 | A kind of flexible package graphene lithium ion battery |
| CN107611475B (en) * | 2017-09-26 | 2024-05-24 | 湖南海博瑞德电智控制技术有限公司 | Soft package power lithium ion battery module and assembling method thereof |
| CN208225955U (en) * | 2018-05-25 | 2018-12-11 | 福建巨电新能源股份有限公司 | Large size is without lithium ion battery module group assembling structure in parallel |
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| CN108777271A (en) | 2018-11-09 |
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