CN116706411A - Battery electrode output integrated part, battery module and battery pack - Google Patents

Battery electrode output integrated part, battery module and battery pack Download PDF

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Publication number
CN116706411A
CN116706411A CN202310642316.XA CN202310642316A CN116706411A CN 116706411 A CN116706411 A CN 116706411A CN 202310642316 A CN202310642316 A CN 202310642316A CN 116706411 A CN116706411 A CN 116706411A
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CN
China
Prior art keywords
battery
plate
electrode output
output terminal
negative electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310642316.XA
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Chinese (zh)
Inventor
李小勇
林桐华
邱飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Farasis Energy Ganzhou Co Ltd
Farasis Energy Zhenjiang Co Ltd
Original Assignee
Farasis Energy Ganzhou Co Ltd
Farasis Energy Zhenjiang Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Farasis Energy Ganzhou Co Ltd, Farasis Energy Zhenjiang Co Ltd filed Critical Farasis Energy Ganzhou Co Ltd
Priority to CN202310642316.XA priority Critical patent/CN116706411A/en
Publication of CN116706411A publication Critical patent/CN116706411A/en
Pending legal-status Critical Current

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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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • 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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a battery electrode output integrated part, a battery module and a battery pack thereof, wherein the battery module comprises a bottom plate, a plurality of battery cells are stacked on the bottom plate, the battery cells are respectively provided with radiating fins connected with the battery cells, liquid cooling plates are respectively arranged on two sides of the bottom plate, an integrated plate and an end plate are respectively arranged on two ends of the bottom plate, the battery electrode output integrated part is arranged between the inner side of the end plate and the battery cells, and the lugs of the battery cells are connected with a positive electrode output terminal, a negative electrode output terminal or a welding surface of a bus bar by laser welding; the bottom plate, the liquid cooling plate, the integrated plate and the end plate are connected to form an outer frame for accommodating the battery cell, and a pressing plate is arranged above the outer frame. According to the battery module, the battery cells are placed in the assembled outer frame layer by layer, and each layer of battery cells are welded with one layer of battery cell electrode lug, so that the assembly complexity is reduced, the production process is simplified, the automatic production efficiency is improved, meanwhile, assembly materials are reduced, and the production cost is reduced; and the radiating effect of the battery cell is better, and the safety is higher.

Description

Battery electrode output integrated part, battery module and battery pack
Technical Field
The invention relates to the technical field of batteries, in particular to a battery electrode output integrated part, a battery module and a battery pack.
Background
With the vigorous development of new energy industry, the battery system is paid attention as a core component of a new energy automobile, and further demands are put forward by consumers on the aspects of battery system safety, low cost, high energy density, high grouping efficiency and the like.
At present, a new energy soft package battery module adopts double-end tab battery cells, the grouping mode is generally divided into serial layers, single battery cells are vertically arranged and stacked in the thickness direction to form a small module, the serial layers and the collection designs are respectively arranged at two ends of the module, and metal or plastic frames are assembled around to form a battery module. The battery system is characterized in that a liquid cooling plate is arranged on a box body, and a heat conducting pad/glue is paved on the liquid cooling plate and then arranged, connected in series and fixed in a certain sequence through the modules; this approach is inefficient for heat exchange and inefficient for grouping.
The current heat transfer mode is that the liquid cooling plate is transferred to the heat conducting glue, then to the module base plate and finally to the battery cell, so that the number and the variety of parts for heat transfer are more, and the overall material cost is higher; the assembly process is complex, so that the production and manufacturing cost is high, and the full-automatic pushing difficulty is high; the split design of the serial layers between the modules can lead to the waste of partial internal space and low grouping efficiency when a small internal space appears in the battery system; the heat transfer way is excessive, the heat loss is more, the heat management and heat exchange effect is relatively poor, and the battery cell is also single-sided heat transfer, so that the high heat exchange requirement of a user cannot be well met.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a battery electrode output integrated part, a battery module and a battery pack.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the battery electrode output integrated piece comprises a mounting plate, wherein a positive electrode output terminal and a negative electrode output terminal are mounted on the mounting plate, welding surfaces of the positive electrode output terminal and the negative electrode output terminal are arranged on the same surface of the mounting plate and are respectively arranged on the upper side and the lower side, and output ends of the positive electrode output terminal and the negative electrode output terminal respectively penetrate through the mounting plate to extend to the other surface; the mounting plate is located the positive pole output terminal with the position between the connecting portion of negative pole output terminal still is equipped with a plurality of busbar, a plurality of glue reducing grooves have been arranged respectively to the two sides of mounting plate.
This battery electrode output integral part simple structure, easily preparation and assembly use, through setting up positive pole output terminal and negative pole output terminal on same mounting panel, the subsequent electric core's of being convenient for is arranged and is connected, also makes things convenient for the wiring of battery, has optimized positive and negative pole arrangement structure and space utilization.
The welding surfaces of the positive electrode output terminal and the negative electrode output terminal and the busbar are arranged on the same side, so that the welding of the follow-up battery cell lugs is facilitated. The setting of subtracting gluey groove can alleviate the weight of mounting panel, also can reduce the material and use. The problem of the hierarchical output of the lying type battery cell module can be solved through the arrangement of the battery electrode output integrated part.
Further, the positive electrode output terminal comprises a strip-shaped positive electrode connecting portion, one face, facing away from the mounting plate, of the positive electrode connecting portion is a welding face, the lower side edge of the positive electrode connecting portion is bent to form a positive electrode output end, the positive electrode connecting portion is connected with the mounting plate through a plurality of terminal positioning columns, and a pair of riveting nuts are arranged on the positive electrode output end so that subsequent wiring connection can be achieved.
Further, the negative electrode output terminal comprises a strip-shaped negative electrode connecting portion, one surface of the negative electrode connecting portion, which faces away from the mounting plate, is a welding surface, the negative electrode connecting portion is connected with the mounting plate through a plurality of terminal positioning columns, the lower side edge of the negative electrode connecting portion is bent and provided with an inverted L-shaped negative electrode output end, and the horizontal portion of the negative electrode output end is provided with a pair of press riveting nuts.
The connection mode of the negative electrode connecting part and the negative electrode output end is slightly different from that of the positive electrode, the negative electrode output end is provided with a section of vertical part and a section of horizontal part, and the connecting part of each part is also provided with a certain bending; because the negative electrode connecting part is arranged on the lower side of the mounting plate, the horizontal part of the negative electrode output end can be moved upwards and positioned in the middle of the mounting plate through the arrangement, and the arrangement is beneficial to positive and negative electrode wiring.
Further, a plurality of mounting shallow grooves are formed in the mounting plate, and hot riveting columns are arranged on the side edges of the mounting shallow grooves; the busbar is installed in the installation shallow slot in a clamping mode and is limited through the hot riveting column connection. The setting of installation shallow slot can hold on the one hand the busbar reduces the convex thickness of busbar, on the other hand also can play spacing effect, a pair of rivet hot post can follow both sides with the busbar is fixed.
The invention also discloses a battery module with the battery electrode output integrated piece, which comprises a bottom plate, wherein a plurality of electric cores are stacked on the bottom plate, each electric core is provided with a heat dissipation wing, liquid cooling plates are respectively arranged on two sides of the bottom plate, an integrated plate and an end plate are respectively arranged on two ends of the bottom plate, the battery electrode output integrated piece is arranged between the inner side of the end plate and the electric core, and a tab of each electric core is connected with a positive electrode output terminal, a negative electrode output terminal or a welding surface of a busbar by laser welding; the bottom plate, the liquid cooling plate, the integrated plate and the end plate are connected to form an outer frame for accommodating the battery cell, and a pressing plate is arranged above the outer frame.
According to the battery module, the battery cells are placed in the assembled outer frame layer by layer, and each layer of battery cells are placed and welded with one layer of battery cell electrode lug, so that the assembly complexity is reduced, the production process is simplified, the automatic production efficiency is improved, meanwhile, assembly materials are reduced, and the production cost is reduced.
Every the electricity core has all been equipped with the heat dissipation wing has optimized the heat radiation structure of electricity core, has promoted the heat exchange efficiency and the radiating effect of electricity core, cooperates the setting of liquid cooling board, the heat transfer can be very big accelerate, battery safety can be guaranteed.
Through the arrangement of the battery module, the series-parallel connection problem of the lying type battery cells can be solved by matching with the welding process.
Further, the radiating fin comprises a radiating plate and radiating flanks arranged on two sides of the radiating plate, the battery cell is arranged on the radiating plate, the radiating flanks are positioned on two sides of the battery cell, and heat-conducting glue is further arranged between the radiating flanks and the liquid cooling plate.
Through the arrangement of the radiating fins with the U-shaped cross sections, heat can be transferred from the bottom surface, the two side surfaces and the battery cell, and the heat exchange efficiency of the battery cell is greatly improved through the design of three-surface heat transfer. The radiating fin is a metal fin with better heat conduction/heat transfer performance, such as an aluminum fin, and conducts the heat of the battery cell to the liquid cooling plate, so that the high-efficiency heat exchange effect of the liquid cooling plate is utilized for radiating and cooling, and meanwhile, the radiating fin has a certain radiating effect.
Further, the both ends of liquid cooling board are connected with the water injection well choke respectively, a pair of still spaced be equipped with a plurality of installation baffles between the liquid cooling board, the installation baffle is last corresponds the tip department of electric core is equipped with respectively and gives up the position logical groove, it is equipped with U-shaped busbar to give up the position logical groove department, the utmost point ear of electric core tip with U-shaped busbar welded connection.
The liquid cooling plate indirectly transfers the heat of the radiating fins to cooling liquid sealed in the circulating pipeline through the cold plate (usually a sealed cavity formed by heat conducting metals such as copper, aluminum and the like), and the cooling plate takes away the heat through the cooling liquid, so that the cooling plate has the advantages of high radiating speed, stability and reliability.
When the battery cells are stacked in multiple stacks, the installation partition plates are arranged, so that the area surrounded by the outer frame can be divided into multiple spaces, and the battery cells can be placed respectively.
Further, sampling terminals are further arranged on the outer side of the end plate or the integrated plate, and the output ends of the positive electrode output terminal and the negative electrode output terminal respectively penetrate through the end plate; and one surface of the integrated plate facing the battery core is also provided with a plurality of bus bars.
The setting of sampling terminal can gather multiple parameter in the battery module, like temperature, electric current, voltage etc. through gathering these parameters, is favorable to grasping the running condition of electric core.
Further, the tab includes integrated into one piece's first link and second link, first link with the shaping buffer tank between the second link, first link is connected the electric core and be equipped with the tab glue with the electric core between, the second link with the welding face laser welding connects, first link with bend between the second link and form 90 ~ 92 degrees angles.
Through the setting of bending and buffer tank, so that let the second link can close coincide welding face, owing to there is certain clearance in this place, also can let laser welding table's laser head act on the welding position smoothly, follow the length direction of utmost point ear with welding face welded fastening.
Further, a manufacturing and assembling method of the battery module is as follows:
connecting the bottom plate, the liquid cooling plate, the integrated plate, the end plate and the battery electrode output integrated piece to form an outer frame for accommodating the battery cell;
processing the electrode lugs of the battery core into buffer grooves and bending the buffer grooves by an angle not smaller than 90 degrees, wherein the processing mode can be tool or die stamping forming;
transferring the battery cells with the bent tabs into the radiating fins, slowly placing the battery cells with the bent tabs into the outer frame, starting to place a second layer of battery cells after the bent tabs and the welding surface are welded by laser, and sequentially placing and welding subsequent battery cells to form a stacked battery module;
and installing the pressing plate after all the battery cells are welded.
A battery pack comprises the battery module manufactured by the method.
Compared with the prior art, the invention has the beneficial effects that: 1. the battery electrode output integrated part is simple in structure and easy to manufacture, assemble and use, and the positive electrode output terminal and the negative electrode output terminal are arranged on the same mounting plate, so that subsequent battery cells are convenient to arrange and connect, the arrangement structure of the positive electrode and the negative electrode of the battery and the space utilization rate are optimized, and the problem of progressive output of a lying module can be cooperatively solved; 2. according to the battery module, the battery cells are placed in the assembled outer frame layer by layer, and each layer of battery cells are welded with one layer of battery cell electrode lug, so that the assembly complexity is reduced, the production process is simplified, the automatic production efficiency is improved, meanwhile, assembly materials are reduced, and the production cost is reduced; 3. the battery module structure with the structure is more reasonable in arrangement, higher in space utilization rate, more battery cores can be arranged in the frame with the same volume, the unit capacity of the battery can be improved, and the miniaturization and the upgrading of the battery can be facilitated; 4. each battery cell is provided with the radiating fin, so that the radiating structure of the battery cell is optimized, the heat exchange efficiency and the radiating effect of the battery cell are improved, and the heat transfer can be greatly accelerated by matching with the arrangement of the liquid cooling plate, so that the safety of the battery can be ensured; 5. the arrangement of the lying type battery cells effectively improves the battery cell grouping efficiency, improves the energy and space utilization rate of the battery system, reduces the material cost and the process cost of the battery system, and improves the assembly efficiency of the system.
Drawings
FIG. 1 is a schematic view of the overall structure of an output integrated battery electrode assembly according to the present invention;
FIG. 2 is a schematic view of the rear exploded structure of the battery electrode output integrated member of the present invention;
fig. 3 is a schematic structural view of an output terminal of the battery electrode output integrated member of the present invention;
fig. 4 is a schematic view illustrating the overall structure of the battery module according to the present invention;
fig. 5 is a schematic view illustrating an exploded structure of the battery module according to the present invention;
FIG. 6 is a schematic diagram of a cell and heat dissipating wing according to the present invention;
FIG. 7 is a schematic illustration of the present invention with a battery cell encased in a heat dissipating fin and then encased in an outer frame;
fig. 8 is a schematic diagram illustrating tab welding of an electric core of the battery module according to the present invention;
FIG. 9 is an enlarged schematic view of the structure of FIG. 8A;
FIG. 10 is a partial perspective view of the weld of FIG. 8;
FIG. 11 is an enlarged schematic view of the structure of FIG. 8B;
in the figure: 1. a battery electrode output integral; 101. a mounting plate; 2. a positive electrode output terminal; 201. a positive electrode connection part; 202. an anode output; 3. a negative electrode output terminal; 301. a negative electrode connection portion; 302. a negative electrode output terminal; 4. a busbar; 5. a glue reducing groove; 6. a terminal positioning column; 7. installing a shallow groove; 8. hot riveting columns; 9. riveting a nut; 10. a bottom plate; 11. a battery cell; 12. a heat dissipating wing; 1201. a heat dissipation plate; 1202. radiating flanks; 1203. a heat-conducting adhesive; 13. a liquid cooling plate; 14. a water tap; 15. an end plate; 16. a sampling terminal; 17. an integrated board; 18. a pressing plate; 19. installing a partition board; 20. a yielding through groove; 21. a laser welding workbench; 22. a tab; 2201. a first connection end; 2202. a second connection end; 2203. a buffer tank; 23. tab glue; 24. u-shaped busbar.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Embodiment one:
as shown in fig. 1 and 2, a battery electrode output integrated part comprises a mounting plate 101, wherein a positive electrode output terminal 2 and a negative electrode output terminal 3 are mounted on the mounting plate 101, welding surfaces (a positive electrode welding surface and a negative electrode welding surface) of the positive electrode output terminal 2 and the negative electrode output terminal 3 are arranged on the same surface of the mounting plate 101 and are respectively arranged on the upper side and the lower side, and output ends (a positive electrode output end and a negative electrode output end) of the positive electrode output terminal 2 and the negative electrode output terminal 3 respectively extend to the other side through the mounting plate 101; the mounting plate 101 is located between the positive electrode output terminal 2 and the connecting portion of the negative electrode output terminal 3, and is further provided with a plurality of bus bars 4, and a plurality of glue reducing grooves 5 are respectively arranged on two sides of the mounting plate 101.
This battery electrode output integral part simple structure, easily preparation and assembly use, through setting up anodal output terminal 2 and negative pole output terminal 3 on same mounting panel 101, the subsequent electric core's of being convenient for is arranged and is connected, also makes things convenient for the wiring of battery, has optimized battery positive and negative pole arrangement structure and space utilization.
The welding surfaces of the positive electrode output terminal 2 and the negative electrode output terminal 3 are arranged on the same side, so that welding of the electrode lugs of the follow-up battery cells is facilitated, and the busbar arranged between the positive electrode output terminal 2 and the negative electrode output terminal can correspond to the battery cells of different layers, so that welding connection of the electrode lugs is facilitated. The setting of subtracting gluey groove can alleviate the weight of mounting panel, also can reduce the material and use.
The mounting plate 101 is a plastic part, the positive electrode output terminal 2 and the negative electrode output terminal 3 can be formed with the mounting plate through an injection molding process, and the busbar 4 can be injection molded in the plastic part or formed through plastic riveting.
Further, as shown in fig. 3, the positive output terminal 2 includes a strip-shaped positive connection portion 201, a surface of the positive connection portion 201 facing away from the mounting plate 101 is a positive welding surface, a lower side edge of the positive connection portion 201 is bent to form a positive output end 202, the positive connection portion 201 is connected with the mounting plate 101 through a plurality of terminal positioning posts 6, and a pair of press-riveting nuts 9 are provided on the positive output end 202.
The positive electrode connecting portion 201 and the positive electrode output end 202 are vertically arranged, certain bending is arranged at the connecting position, the positive electrode connecting portion 201 is fixedly installed on the upper side of the mounting plate through a pair of terminal positioning columns, the positive electrode output end 202 horizontally extends outwards from the mounting plate, and a pair of press riveting nuts are arranged at the extending position so that subsequent wiring connection can be achieved.
The negative electrode output terminal 3 comprises a strip-shaped negative electrode connecting portion 301, one surface of the negative electrode connecting portion 301, which faces away from the mounting plate 101, is a negative electrode welding surface, the negative electrode connecting portion 301 is connected with the mounting plate through a plurality of terminal positioning columns, the lower side edge of the negative electrode connecting portion 301 is bent and provided with an inverted L-shaped negative electrode output end 302, and a pair of press riveting nuts are arranged on the horizontal portion of the negative electrode output end 302.
The connection mode of the negative electrode connection part 301 and the negative electrode output end 302 is slightly different from that of the positive electrode, the negative electrode output end 302 is provided with a section of vertical part and a section of horizontal part, and the connection parts of the two parts are also provided with certain bending; since the negative electrode connecting part 301 is arranged at the lower side of the mounting plate, the horizontal part of the negative electrode output end 302 can be moved upwards by the arrangement, and the arrangement is in the middle of the mounting plate, so that positive and negative electrode wiring is facilitated; and similarly, a pair of press-riveting nuts are arranged at the horizontally extending position of the negative electrode output end.
As an implementation manner, the mounting plate 101 is provided with a plurality of mounting shallow grooves 7, and the side edges of the mounting shallow grooves 7 are provided with hot riveting columns 8; the busbar 4 is installed in the installation shallow groove 7 in a clamping mode and is limited in a connecting mode through the hot riveting column 8.
The arrangement of the mounting shallow grooves 7 can accommodate the busbar 4 on one hand, reduce the protruding thickness of the busbar 4, and can play a limiting role on the other hand, and the pair of hot riveting columns 8 can fix the busbar 4 from two sides.
Through foretell improvement back, whole battery electrode output integrated piece 1 is simple compacter, and each part that sets up on it is also more reasonable, is favorable to follow-up battery module's assembly connection, has laid better basis for battery module's space utilization.
Embodiment two:
as shown in fig. 4 and fig. 5, the battery module with the battery electrode output integrated part in the first embodiment includes a bottom plate 10, a plurality of electric cores 11 are stacked on the bottom plate 10, each electric core 11 is equipped with a heat dissipation wing 12, two sides of the bottom plate 10 are respectively provided with a liquid cooling plate 13, two ends of the bottom plate 10 are respectively provided with an integrated plate 17 and an end plate 15, the battery electrode output integrated part 1 is arranged between the inner side of the end plate 15 and the electric core 11, and lugs 22 at two ends of the electric core 11 are connected with the welding surfaces of the positive electrode output terminal 2, the negative electrode output terminal 3 or the busbar 4 by laser welding; the bottom plate 10, the liquid cooling plate 13, the integrated plate 17 and the end plate 15 are connected to form an outer frame for accommodating the battery cell 11, and a pressing plate 18 is arranged above the outer frame.
According to the battery module, the battery cells 11 are placed in the assembled outer frame layer by layer, and each layer of battery cells are placed and welded with the electrode lugs of one layer of battery cells, so that the assembly complexity is reduced, the production process is simplified, the automatic production efficiency is improved, meanwhile, assembly materials are reduced, and the production cost is reduced; the battery module structure with the structure is more reasonable in arrangement, higher in space utilization rate, more battery cores can be arranged in the frame with the same volume, the unit capacity and the battery density of the battery can be improved, and the miniaturization and the upgrading of the battery are facilitated.
Every electric core 11 has all been equipped with heat dissipation wing 12, has optimized the heat radiation structure of electric core, has promoted electric core 11's heat exchange efficiency and radiating effect, cooperation liquid cooling plate 13's setting can be very big accelerate thermal transmission, battery safety can be guaranteed. The liquid cooling plate 13 is used as a heat exchange component and also is used as a part of the outer frame of the battery, so that the thickness and the space occupation of the outer frame can be reduced.
Through this battery module's setting, can let electric core 11 pass through the mode series connection that layer by layer lies, the welding position of utmost point ear 22 all sets up the position in electric core 11 both sides, just can utilize laser welding workstation 21 to carry out laser welding operation in this position, utilizes this kind of welding process can solve the electric core series-parallel problem of concatenating of lying, and the battery electrode output integral part of above-mentioned design also can cooperate the problem of solving the hierarchical output of lying type module.
In some embodiments, the bottom plate may be replaced by a box, the battery cell is mounted on the box, and the liquid cooling plates may be disposed on two sides of the box.
Further, as shown in fig. 6, the heat dissipation wing 12 includes a heat dissipation plate 1201 and heat dissipation wings 1202 disposed on two sides of the heat dissipation plate 1201, the battery cell 11 is disposed on the heat dissipation plate 1201, the heat dissipation wings 1202 are disposed on two sides of the battery cell 11, and a heat conducting adhesive 1203 is further disposed between the heat dissipation wings 1202 and the liquid cooling plate 13.
Through the arrangement of the radiating fin wings 12 with the U-shaped cross section, heat can be transferred from the bottom surface, the two side surfaces and the battery cells, the heat exchange efficiency of the battery cells is greatly improved through the three-surface heat transfer design, and a heat transfer structure of the radiating plate is formed between the upper battery cells and the lower battery cells through the arrangement of the structure.
Further, two ends of the liquid cooling plate 13 are respectively connected with a water nozzle 14, a pair of installation separation plates 19 are arranged between the liquid cooling plates 13 at intervals, a yielding through groove 20 is respectively arranged at the end part of the installation separation plates 19 corresponding to the battery cell 11, a U-shaped busbar 24 is arranged at the yielding through groove 20, and a lug 22 at the end part of the battery cell 11 is connected with the U-shaped busbar in a welding mode.
In some embodiments, the battery cells 11 are stacked in multiple stacks, in this case, by the arrangement of the mounting partition 19, the area surrounded by the outer frame can be divided into multiple spaces so as to respectively mount the battery cells 11, and the mounting partition 19 has a positive effect on the connection support of the battery cells, and the U-shaped bus bars 24 arranged on the mounting partition 19 can also be connected with the tabs of the battery cells.
Further, a sampling terminal 16 is further disposed on the outer side of the end plate 15, and the output ends of the positive electrode output terminal 2 and the negative electrode output terminal 3 respectively pass through the end plate 15; the side of the integrated board 17 facing the battery cell 11 is also provided with a plurality of bus bars 4.
Further, as shown in fig. 9, the tab 22 includes a first connection end 2201 and a second connection end 2202 that are integrally formed, a buffer groove 2203 is formed between the first connection end 2201 and the second connection end 2202, the first connection end 2201 is connected with the battery cell 11 and is provided with a tab adhesive 23 between the battery cell, the second connection end 2202 is connected with the welding surface by laser welding, and an angle of 90-92 ° is formed by bending the first connection end 2201 and the second connection end 2202.
Through the setting of bending and buffer tank, can let utmost point ear 22 form certain deformation and adaptability in this narrow and small space, so that let second link 2202 can closely coincide the welded surface, because there is certain clearance in this place, also can let the laser head of laser welding workstation 21 act on the welded part smoothly, follow the length direction of utmost point ear 22 with welded surface welded fastening, the utmost point ear of different layers and the negative pole output, busbar or the anodal output welded connection that the layer corresponds of place promptly.
Embodiment III:
referring to fig. 7 to 10, a method for manufacturing and assembling a battery module with an integrated battery electrode output unit is as follows:
the bottom plate 10, the liquid cooling plate 13, the integrated plate 17, the end plate 15 and the battery electrode output integrated piece 1 are connected to form an outer frame for accommodating the battery cell 11, and the outer frame can be connected through bolts or welded;
punching a buffer groove 2203 on the lug 22 of the battery cell 11 and bending the lug to form an angle of 90-92 degrees;
turning the battery cells with the bent tabs into the heat dissipation wings 12, slowly placing the battery cells into the heat dissipation wings 12 into the outer frame, and starting to place a second layer of battery cells after the bent tabs (the second connecting end 2202) and the welding surface are welded by laser, wherein the subsequent battery cells are placed in sequence and welded to form a stacked battery module; the platen 18 is installed after all the die welds are completed.
Specifically, for the single-stack stacked battery cells 11, when the first layer of battery cells are welded, the tabs 22 at two ends of the battery cells are welded with the welding surface of the negative electrode output terminal 3 on the battery electrode output integrated piece 1, and the other tab is welded with the busbar 4 on the integrated board 17; then stacking a second layer of electric core, wherein the lugs at two ends of the second layer of electric core are welded with the bus bars on the battery electrode output integrated piece, and the other electrode is welded with the bus bars on the integrated board; stacking the battery cells to the uppermost layer in a sequential manner, wherein two ends of the battery cell on the uppermost layer emit lugs, one lug is welded with a welding surface of the positive electrode output terminal 2 on the battery electrode output integrated piece 1, and the other lug is welded with a busbar on the integrated board; finally, the tab welding connection of all the battery cells is completed.
For the stacked battery cells, each layer is provided with a plurality of battery cells 11, the battery cells 11 positioned at two sides, and the lugs of the battery cells close to one side of the battery electrode output integrated piece 1 are respectively corresponding to the negative electrode output terminal 3, the plurality of bus bars 4 and the positive electrode output terminal 2 from bottom to top and are respectively welded and connected, and the lugs of the battery cells close to one side of the integrated board 17 are respectively welded and connected with the plurality of bus bars 4 on the integrated board from bottom to top; the battery cell lugs at the middle part are welded and connected by utilizing a plurality of U-shaped bus bars 24 which are sequentially arranged on the mounting partition plate 19 from bottom to top, namely, the welding surfaces at two sides of the U-shaped bus bars 24 are respectively welded and connected with the lugs at the corresponding sides, so that the series connection of the stacks of the battery cells can be completed. The battery module manufactured by the mode can be manufactured into a battery pack with higher battery energy density.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (11)

1. The battery electrode output integrated part is characterized by comprising a mounting plate, wherein a positive electrode output terminal and a negative electrode output terminal are mounted on the mounting plate, welding surfaces of the positive electrode output terminal and the negative electrode output terminal are arranged on the same surface of the mounting plate and are respectively arranged on the upper side and the lower side, and output ends of the positive electrode output terminal and the negative electrode output terminal respectively penetrate through the mounting plate to extend to the other surface; the mounting plate is located the positive pole output terminal with the position between the connecting portion of negative pole output terminal still is equipped with a plurality of busbar.
2. The battery electrode output integrated part according to claim 1, wherein the positive electrode output terminal comprises a strip-shaped positive electrode connecting portion, one surface of the positive electrode connecting portion, which faces away from the mounting plate, is a welding surface, the lower side edge of the positive electrode connecting portion is bent to form a positive electrode output end, the positive electrode connecting portion is connected with the mounting plate through a plurality of terminal positioning columns, and a pair of press-riveting nuts are arranged on the positive electrode output end.
3. The battery electrode output integrated part according to claim 1, wherein the negative electrode output terminal comprises a strip-shaped negative electrode connecting portion, one surface of the negative electrode connecting portion facing away from the mounting plate is a welding surface, the negative electrode connecting portion is connected with the mounting plate through a plurality of terminal positioning columns, the lower side edge of the negative electrode connecting portion is bent and provided with an inverted-L-shaped negative electrode output end, and a pair of press-riveting nuts are arranged on the horizontal portion of the negative electrode output end.
4. The battery electrode output integrated part according to claim 1, wherein the mounting plate is provided with a plurality of mounting shallow grooves, and the sides of the mounting shallow grooves are provided with hot riveting columns; the busbar is installed in the installation shallow slot in a clamping mode and is limited through the hot riveting column connection.
5. The battery module with the battery electrode output integrated piece according to any one of claims 1 to 4, which is characterized by comprising a bottom plate or a box body, wherein a plurality of electric cores are stacked on the bottom plate or the box body, each electric core is provided with a radiating fin connected with the electric core, liquid cooling plates are respectively arranged on two sides of the bottom plate or the box body, an integrated plate and an end plate are respectively arranged on two ends of the bottom plate, the battery electrode output integrated piece is arranged between the inner side of the end plate and the electric core, and a lug of the electric core is connected with a welding surface of the positive electrode output terminal, the negative electrode output terminal or the bus bar through laser welding; the bottom plate, the liquid cooling plate, the integrated plate and the end plate are connected to form an outer frame for accommodating the battery cell, and a pressing plate is arranged above the outer frame.
6. The battery module of claim 5, wherein the heat dissipation wings comprise heat dissipation plates and heat dissipation flanks arranged on two sides of the heat dissipation plates, the battery cells are arranged on the heat dissipation plates, the heat dissipation flanks are positioned on two sides of the battery cells, and heat conduction glue is further arranged between the heat dissipation flanks and the liquid cooling plates.
7. The battery module of claim 5, wherein two ends of the liquid cooling plates are respectively connected with water nozzles, a plurality of installation partition plates are arranged between a pair of the liquid cooling plates at intervals, a yielding through groove is respectively arranged on the installation partition plates at the end part corresponding to the battery cell, a U-shaped busbar is arranged at the yielding through groove, and the lugs at the end part of the battery cell are connected with the U-shaped busbar in a welding way.
8. The battery module of claim 5, wherein the end plate or the outside of the integrated plate is further provided with a sampling terminal, and the output ends of the positive electrode output terminal and the negative electrode output terminal respectively pass through the end plate; and one surface of the integrated plate facing the battery core is also provided with a plurality of bus bars.
9. The battery module of claim 5, wherein the tab comprises a first connecting end and a second connecting end which are integrally formed, a buffer groove is formed between the first connecting end and the second connecting end, the first connecting end is connected with the battery cell and is provided with tab glue with the battery cell, the second connecting end is connected with the welding surface by laser welding, and an angle of 90-92 degrees is formed by bending between the first connecting end and the second connecting end.
10. The battery module of claim 5, wherein one manufacturing and assembling method of the battery module is as follows:
connecting the bottom plate, the liquid cooling plate, the integrated plate, the end plate and the battery electrode output integrated piece to form an outer frame for accommodating the battery cell;
processing a buffer groove on the electrode lug of the battery core and bending the electrode lug by an angle not smaller than 90 degrees;
transferring the battery cells with the bent electrode lugs into the radiating fin wings, then placing the radiating fin wings provided with the battery cells into the outer frame, carrying out laser welding on the electrode lugs and the welding surface, and sequentially placing and welding the subsequent battery cells to form a stacked battery module; and installing the pressing plate after welding all the battery cells.
11. A battery pack comprising one or more battery modules of claim 5 having battery electrode output integral pieces.
CN202310642316.XA 2023-06-01 2023-06-01 Battery electrode output integrated part, battery module and battery pack Pending CN116706411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310642316.XA CN116706411A (en) 2023-06-01 2023-06-01 Battery electrode output integrated part, battery module and battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310642316.XA CN116706411A (en) 2023-06-01 2023-06-01 Battery electrode output integrated part, battery module and battery pack

Publications (1)

Publication Number Publication Date
CN116706411A true CN116706411A (en) 2023-09-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310642316.XA Pending CN116706411A (en) 2023-06-01 2023-06-01 Battery electrode output integrated part, battery module and battery pack

Country Status (1)

Country Link
CN (1) CN116706411A (en)

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