CN107331826B - Connection method of power battery pack and battery pack produced by using same - Google Patents
Connection method of power battery pack and battery pack produced by using same Download PDFInfo
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- CN107331826B CN107331826B CN201610274669.9A CN201610274669A CN107331826B CN 107331826 B CN107331826 B CN 107331826B CN 201610274669 A CN201610274669 A CN 201610274669A CN 107331826 B CN107331826 B CN 107331826B
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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
- 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
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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
- 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
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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
- 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
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to a power battery pack. The technical scheme is as follows: the anode and the cathode of the power battery pack are respectively provided with a copper-aluminum composite board, one surface of the copper-aluminum composite board is a copper board surface, and the other surface of the copper-aluminum composite board is an aluminum board surface; the copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode; the single batteries (1) in each row are welded in parallel through a fuse (2), ultrasonic welding is adopted between the single battery electrode and the fuse (2), and ultrasonic welding is adopted between the aluminum plate surface and the fuse (2). After the technical scheme of the invention is adopted, the processing is convenient, the cost is reduced, and the parallel connection of the battery packs is stable and reliable and has good electric conductivity.
Description
Technical Field
The present invention relates to a method for connecting power battery packs, and more particularly, to a method for connecting high-power battery packs in parallel. The method can be used in the technical field of manufacturing and processing of power battery packs such as battery packs of electric automobiles, battery packs of electric motorcycles, battery packs of electric bicycles and the like.
The second invention relates to a power battery pack, in particular to a high-power battery pack. The method can be used in the technical field of manufacturing and processing of power battery packs such as battery packs of electric automobiles, battery packs of electric motorcycles, battery packs of electric bicycles and the like.
The second invention is a specific product produced by the method of the first invention.
Background
The high-power battery pack is used as a power source and is the first choice for developing power supplies of electric automobiles, emergency communication equipment and special equipment at present.
The BATTERY pack is a process of processing, packaging and the like each BATTERY unit to form a BATTERY pack or BATTERY pack capable of meeting the requirements of users in a certain series connection and parallel connection mode, and the power BATTERY pack of the electric automobile comprises a power BATTERY system assembly which integrates and fixes a power BATTERY module, a BATTERY management system (English: BATTERY MANAGEMENT SYSTEM, BMS for short) and the like in a high-voltage BATTERY box so as to enable the power BATTERY module and the BATTERY management system to be capable of meeting various performance indexes required by safe and reliable running of the electric automobile.
The battery packs of the electric automobile are connected in a series-connection mode, a parallel-connection mode, a series-parallel connection mode and the like. The existing connection method comprises the following steps: firstly, each battery and the nickel strap are directly connected by spot welding of a resistance welding machine; and secondly, each battery and the copper-nickel composite sheet are directly connected by spot welding through a resistance welding machine. For convenience of understanding, the parallel connection mode of the conventional battery pack is shown in fig. 7, the power battery pack comprises a plurality of single batteries 1, the single batteries 1 form the power battery pack through a battery bracket, and the positive and negative electrodes of the single batteries are welded with the conventional bus plate through intermittent fuses.
In the actual use process, the inventor finds that: the existing mode is used for processing the power battery pack, the manufacturing process is complex, and the cost is high; the battery pack has poor conductivity, and the battery pack is easy to have poor consistency, so that the continuous mileage is reduced.
Disclosure of Invention
The first object of the present invention is to provide a parallel connection method of power battery packs, which aims to achieve the following objects: by using the specific parallel connection method of the power battery packs, the processing is convenient, the cost is reduced, and the parallel connection of the battery packs is stable and reliable and has good electric conductivity.
The utility model provides a connection method of power battery group, power battery group is including a plurality of battery cells, a plurality of battery cells pass through the battery support and constitute power battery group body, its characterized in that:
the anode and the cathode of the power battery pack are respectively provided with a copper-aluminum composite board, one surface of the copper-aluminum composite board is a copper board surface, and the other surface of the copper-aluminum composite board is an aluminum board surface; the copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode; holes matched with the shapes of the single batteries are formed in the copper-aluminum composite board; an insulating gasket is arranged between the copper plate surface and the positive electrode of the power battery pack; the single battery electrodes of each row are connected in parallel through a continuous fuse wire, and ultrasonic welding is adopted between the single battery electrodes and the fuse wire; ultrasonic welding is adopted between the aluminum plate surface and the fuse.
Further, two-point welding is adopted between each single battery electrode and the fuse, and two-point welding is adopted between the aluminum plate surface and the fuse; the welding steps are as follows:
a. welding a point between the fuse and the aluminum plate surface;
b. pulling the fuse to a battery electrode, and welding a point between the fuse and the battery electrode;
c. pulling the fuse by 1 mm-2 mm, and welding a point between the fuse and a battery electrode;
d. pulling the fuse to the aluminum plate surface, and welding a point between the fuse and the aluminum plate surface;
e. pulling the fuse by 1 mm-2 mm, and welding a point between the fuse and the aluminum plate surface;
f. repeating the step b, c, d, e until all the single batteries positioned in the same row are welded;
g. and pulling the fuse to the aluminum plate surface, and welding a point between the fuse and the aluminum plate.
Further, the fuse is a pure aluminum wire.
Further, the ultrasonic welding point is subjected to dispensing by using electric contact conductive paste or silver paste.
Further, the unit cell is a cylindrical battery.
The invention also discloses a power battery pack manufactured by the method of the invention, which aims to realize: the battery packs are connected in parallel stably and reliably and have good electric conductivity.
The power battery pack comprises a plurality of single batteries, wherein the plurality of single batteries form a power battery pack body through a battery bracket, and the power battery pack is characterized in that:
the anode and the cathode of the power battery pack are respectively provided with a copper-aluminum composite board, one surface of the copper-aluminum composite board is a copper board surface, and the other surface of the copper-aluminum composite board is an aluminum board surface; the copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode; holes matched with the shapes of the single batteries are formed in the copper-aluminum composite board; an insulating gasket is arranged between the copper plate surface and the positive electrode of the power battery pack; the single battery electrodes of each row are connected in parallel through a continuous fuse wire, and the single battery electrodes and the fuse wire are welded through ultrasonic waves; and ultrasonic welding is performed between the aluminum plate surface and the fuse.
Further, each single battery electrode is fixedly connected with the fuse through two-point welding, and the aluminum plate surface is fixedly connected with the fuse through two-point welding.
Further, the fuse is a pure aluminum wire.
Further, the ultrasonic bonding pad is a bonding pad coated with an electrical contact conductive paste or silver paste.
Further, the thickness of the copper plate surface is 0.1 mm-0.3 mm; the thickness of the aluminum plate surface is 1mm.
The beneficial effects after the technical scheme is adopted are that:
and according to the current density requirement, reasonably utilizing the copper-aluminum composite board structure. The thickness of the copper plate surface is about 0.1 mm-0.3 mm, and the copper plate is used for electric conduction and heat conduction; the aluminum plate surface is generally more than 1mm, is easy to be welded with pure aluminum wires by ultrasonic pressure welding, and plays roles of electric conduction, heat conduction and heat dissipation.
The length or volume of the copper-aluminum composite board with the same weight is 2.5-2.7 times of that of the pure copper bar, and the quality of the battery pack is effectively reduced. Of course, in order to improve corrosion resistance, a tin plating and zinc plating treatment may be performed on the copper plate surface. The copper-aluminum composite board is used, copper and nickel resources are saved, the production matching cost is reduced, and the environment is protected.
The copper plate surface solves the electric conductivity, can be directly used as an electrode bus plate, and is close to the shell of the compressed single battery, thereby not only playing roles of heat conduction and heat dissipation, but also playing roles of balancing and consistent temperature of all parallel batteries in the battery pack module. The aluminum plate surface is ultrasonically welded with the fuse wire sent out by the ultrasonic press welder, the single battery electrode is ultrasonically welded with the fuse wire sent out by the ultrasonic press welder, the fuse wire can play a role in current connection, and the conductivity of the battery pack is improved.
The fuse not only plays a role in conducting electricity between the battery and the copper-aluminum composite board, but also plays a role in the fuse of each single battery.
And (5) connecting fuses in parallel and performing ultrasonic welding. When repairing or demolishing battery module, demolish the connection convenience, namely: cut or pull the fuse. Compared with the existing copper-nickel composite sheet, the copper-nickel composite sheet adopts resistance spot welding, so that the connection is very firm, and the repair or disassembly is very difficult.
And a special two-point ultrasonic welding mode is used, so that the contact reliability and stability of each single battery in parallel connection are improved.
And dispensing each welding spot by using a dispensing machine. The electrical contact conductive adhesive, silver paste and the like are used for dispensing, so that the ultrasonic welding point is protected from oxidation, and the conductivity of the welding point and the mechanical strength of the welding point are enhanced.
The cylindrical single batteries are adopted, so that the arrangement and the combination of the single batteries are facilitated, and the size requirements of most single batteries in the market are met, for example, the single batteries with the specifications of 18650, 26650, 26800, 32650 and the like.
From the economic and social viewpoints, after the power battery pack is applied, the average cost of each vehicle can be saved by more than 5000 yuan. Taking a bus as an example, each bus can save more than 2 ten thousand yuan. According to 50 ten thousand of automobiles in the China in 2016 years, the social cost can be saved by 30-50 hundred million.
Drawings
Fig. 1 is a schematic diagram of a front view of a battery pack according to the present invention;
FIG. 2 is a schematic view of the structure of the A-direction of FIG. 1;
FIG. 3 is a schematic view of the B-direction structure of FIG. 1;
FIG. 4 is a schematic view of the structure of the C-direction of FIG. 1;
FIG. 5 is a schematic view of the D-direction structure of FIG. 1;
FIG. 6 is an exploded view of FIG. 1;
fig. 7 is a schematic view of a prior art parallel connection structure of a battery pack.
In the figure: 1. the battery pack comprises a single battery, 2, fuses, 3, a bus plate, 3a, a positive bus plate, 3b, a negative bus plate, 4, welding points, 5a, positive lugs, 5b, negative lugs, 6a, a 1# electrode support, 6b, a 2# electrode support, 7, an electrode connecting plate, 8a, a 1# fastener, 8b, a 2# fastener, 8c, a 3# fastener, 9, an insulating gasket, 10a, a 1# hole, 10b, a 2# hole, 11 and a fuse conductive paste coating.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
Example 1
As shown in fig. 1 to 6, a method for connecting a power battery pack, the power battery pack includes a plurality of unit cells 1, a bus plate 3 and a cell holder, wherein the positive electrode portion of the unit cell 1 is fixed by a 1# cell holder 6a, and the negative electrode portion of the unit cell 1 is fixed by a 2# cell holder 6 b.
As shown in fig. 1 and 6, the busbar 3 is a copper-aluminum composite plate, one surface of which is a copper plate surface, and the other surface of which is an aluminum plate surface. The copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode. As shown in fig. 1, 4, 5 and 6, the specific description is as follows: the positive electrode bus plate 3a is a copper-aluminum composite plate, the copper plate of the positive electrode bus plate 3a faces towards the positive electrode of the power battery pack, and the aluminum plate of the positive electrode bus plate 3a faces away from the positive electrode of the power battery pack; the negative electrode bus plate 3b is a copper-aluminum composite plate, the copper plate surface of the negative electrode bus plate 3b faces the negative electrode of the power battery, and the aluminum plate surface of the negative electrode bus plate 3b faces away from the negative electrode of the power battery.
As shown in fig. 6, holes matching with the shapes of the single batteries are formed in the 1# battery support 6a and the 2# battery support 6b, holes 10a matching with the shapes of the single batteries are formed in the positive electrode bus plate 3a, holes 10b matching with the shapes of the single batteries are formed in the negative electrode bus plate 3b, an insulating gasket 9 is arranged between the copper plate surface and the positive electrode of the power battery pack, the outer diameter of the insulating gasket is the same as the outer diameter of the battery, and the inner diameter of the insulating gasket is the same as the holes in the bus plate.
As shown in fig. 1, 2 and 6, the positive electrode bus plate 3a is provided with a positive electrode tab 5a, the negative electrode bus plate 3b is provided with a negative electrode tab 5b, and an electrode connection plate 7 is provided between the positive electrode tab 5a and the negative electrode tab 5 b.
As shown in fig. 1 and 6, the positive electrode bus plate 3a is fixed to the 1# battery holder 6a by a 1# fastener 8a, the negative electrode bus plate 3b is fixed to the 2# battery holder 6b by a 2# fastener 8b, the positive electrode tab 5a is fixed to one end of the electrode connection plate 7 by a 3# fastener 8c, and the negative electrode tab 5b is fixed to the other end of the electrode connection plate 7 by a 3# fastener 8 c.
As shown in fig. 4 and 5, the single battery electrodes in each row are welded in parallel through a continuous fuse 2, and ultrasonic welding is adopted between the single battery electrodes and the fuse 2; ultrasonic welding is adopted between the aluminum plate surface and the fuse 2.
Therefore, a plurality of single battery electrodes and the copper-aluminum composite board 3 can be welded in parallel through one fuse 2, and the fuse not only plays a role in conducting electricity between a battery and the copper-aluminum composite board, but also plays a role in the fuse of each single battery.
The copper plate surface solves the electric conductivity, can be directly used as an electrode bus plate, and is close to the shell of the compressed single battery, thereby not only playing roles of heat conduction and heat dissipation, but also playing roles of balancing and consistent temperature of all parallel batteries in the battery pack module. The aluminum plate surface is ultrasonically welded with the fuse wire sent out by the ultrasonic press welder, the single battery electrode is ultrasonically welded with the fuse wire sent out by the ultrasonic press welder, the fuse wire can play a role in current connection, and the conductivity of the battery pack is improved.
The fastener described above can be, but is not limited to, a screw.
Example two
As an improvement of the power battery pack connection method according to the present invention, as shown in fig. 1, 3 and 4, two-point welding is adopted between the battery cell electrode and the fuse 2, two-point welding is adopted between the aluminum plate surface and the fuse 2, and the welding steps are as follows:
a. welding a point between the fuse and the aluminum plate surface;
b. pulling the fuse to a battery electrode, and welding a point between the fuse and the battery electrode;
c. pulling the fuse by 1 mm-2 mm, and welding a point between the fuse and a battery electrode;
d. pulling the fuse to the aluminum plate surface, and welding a point between the fuse and the aluminum plate surface;
e. pulling the fuse by 1 mm-2 mm, and welding a point between the fuse and the aluminum plate surface;
f. repeating the step b, c, d, e until all the single batteries positioned in the same row are welded;
g. and pulling the fuse to the aluminum plate surface, and welding a point between the fuse and the aluminum plate.
In this way, the single cells in a row are connected in parallel by a continuous fuse. The two-point ultrasonic welding mode is used, the reliability and stability of parallel connection of each single battery are improved, and the battery module is convenient to repair or disassemble.
In addition, the inventor finds that through practical inspection: the fuse 2 is best in effect when it is made of pure aluminum.
The single battery can be selected from single batteries with any shape, such as rectangle. In practice, cylindrical single batteries are preferred, and the application range of the cylindrical single batteries is the widest. When the cylindrical single battery is selected, the holes on the copper-aluminum composite board and the holes on the electrode bracket are round holes.
In order to improve the reliability and stability of the welding point 4, the ultrasonic welding point is preferably provided with a fuse conductive paste coating 11, and the fuse conductive paste coating 11 can be electric contact conductive paste or silver paste, and the application mode is dispensing. Ext> theext> electricalext> contactext> conductiveext> pasteext> canext> beext>,ext> butext> isext> notext> limitedext> toext>,ext> DDGext> -ext> aext> highext> efficiencyext> electricalext> contactext> conductiveext> pasteext>.ext>
Example III
The power battery pack comprises a plurality of single batteries 1, a bus plate 3 and a battery bracket, wherein the positive electrode part of the single battery 1 is fixed through a No. 1 battery bracket 6a, and the negative electrode part of the single battery 1 is fixed through a No. 2 battery bracket 6 b.
As shown in fig. 1 and 6, the busbar 3 is a copper-aluminum composite plate, one surface of which is a copper plate surface, and the other surface of which is an aluminum plate surface. The copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode. As shown in fig. 1, 4, 5 and 6, the specific description is as follows: the positive electrode bus plate 3a is a copper-aluminum composite plate, the copper plate of the positive electrode bus plate 3a faces towards the positive electrode of the power battery pack, and the aluminum plate of the positive electrode bus plate 3a faces away from the positive electrode of the power battery pack; the negative electrode bus plate 3b is a copper-aluminum composite plate, the copper plate surface of the negative electrode bus plate 3b faces the negative electrode of the power battery, and the aluminum plate surface of the negative electrode bus plate 3b faces away from the negative electrode of the power battery.
As shown in fig. 6, holes matching with the shapes of the single batteries are formed in the 1# battery support 6a and the 2# battery support 6b, holes 10a matching with the shapes of the single batteries are formed in the positive electrode bus plate 3a, holes 10b matching with the shapes of the single batteries are formed in the negative electrode bus plate 3b, an insulating gasket 9 is arranged between the copper plate surface and the positive electrode of the power battery pack, the outer diameter of the insulating gasket is the same as the outer diameter of the battery, and the inner diameter of the insulating gasket is the same as the holes in the bus plate.
As shown in fig. 1, 2 and 6, the positive electrode bus plate 3a is provided with a positive electrode tab 5a, the negative electrode bus plate 3b is provided with a negative electrode tab 5b, and an electrode connection plate 7 is provided between the positive electrode tab 5a and the negative electrode tab 5 b.
As shown in fig. 1 and 6, the positive electrode bus plate 3a is fixed to the 1# battery holder 6a by a 1# fastener 8a, the negative electrode bus plate 3b is fixed to the 2# battery holder 6b by a 2# fastener 8b, the positive electrode tab 5a is fixed to one end of the electrode connection plate 7 by a 3# fastener 8c, and the negative electrode tab 5b is fixed to the other end of the electrode connection plate 7 by a 3# fastener 8 c.
As shown in fig. 4 and 5, the single battery electrodes in each row are welded in parallel through a continuous fuse 2, and ultrasonic welding is adopted between the single battery electrodes and the fuse 2; ultrasonic welding is adopted between the aluminum plate surface and the fuse 2.
The fastener described above can be, but is not limited to, a screw.
Example IV
As an improvement of the power battery pack, two-point welding is adopted between the single battery electrode and the fuse 2, and two-point welding is adopted between the aluminum plate surface and the fuse 2. The welding procedure is the same as in the examples.
Example five
As an improvement of the power battery pack, the thickness of the copper plate surface is 0.1-0.3 mm; the thickness of the aluminum plate surface is 1mm. In addition, the fuse 2 is preferably a pure aluminum wire.
The invention is not limited to the above embodiments, and all technical solutions using equivalent substitutions or equivalent substitutions are within the scope of the invention as claimed.
Claims (8)
1. The utility model provides a connection method of power battery group, power battery group is including a plurality of battery cells (1), a plurality of battery cells (1) constitute power battery group body through battery support (6 a, 6 b), its characterized in that:
the anode and the cathode of the power battery pack are respectively provided with a copper-aluminum composite board, one surface of the copper-aluminum composite board is a copper board surface, and the other surface of the copper-aluminum composite board is an aluminum board surface; the copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode; holes (10 a, 10 b) matched with the shapes of the single batteries are formed in the copper-aluminum composite board; an insulating gasket (9) is arranged between the copper plate surface and the positive electrode of the power battery pack;
the single battery electrodes of each row are welded in parallel through a continuous fuse (2), and ultrasonic welding is adopted between the single battery electrodes and the fuse (2); ultrasonic welding is adopted between the aluminum plate surface and the fuse (2);
two-point welding is adopted between each single battery electrode and the fuse (2), and two-point welding is adopted between the aluminum plate surface and the fuse (2); the welding steps are as follows:
a. welding a point between the fuse and the aluminum plate surface;
b. pulling the fuse to a battery electrode, and welding a point between the fuse and the battery electrode;
c. pulling the fuse by 1 mm-2 mm, and welding a point between the fuse and a battery electrode;
d. pulling the fuse to the aluminum plate surface, and welding a point between the fuse and the aluminum plate surface;
e. pulling the fuse by 1 mm-2 mm, and welding a point between the fuse and the aluminum plate surface;
f. repeating the step b, c, d, e until all the single batteries positioned in the same row are welded;
g. pulling the fuse to the aluminum plate surface, and welding a point between the fuse and the aluminum plate;
the thickness of the copper plate surface is 0.1 mm-0.3 mm; the thickness of the aluminum plate surface is more than 1mm.
2. The connection method of a power battery pack according to claim 1, characterized in that: the fuse (2) is a pure aluminum wire.
3. The connection method of a power battery pack according to claim 1, characterized in that: and dispensing the ultrasonic welding point by using electric contact conductive paste or silver paste.
4. The connection method of a power battery pack according to claim 1, characterized in that: the unit cell is a cylindrical battery.
5. A power battery pack prepared by the method for connecting a power battery pack according to claim 1, comprising a plurality of unit cells (1), wherein the plurality of unit cells (1) form a power battery pack body through battery supports (6 a, 6 b), and the method is characterized in that:
the anode and the cathode of the power battery pack are respectively provided with a copper-aluminum composite board, one surface of the copper-aluminum composite board is a copper board surface, and the other surface of the copper-aluminum composite board is an aluminum board surface; the copper plate faces towards the power battery electrode, and the aluminum plate faces away from the power battery electrode; holes (10 a, 10 b) matched with the shapes of the single batteries are formed in the copper-aluminum composite board; an insulating gasket (9) is arranged between the copper plate surface and the positive electrode of the power battery pack;
the single battery electrodes of each row are welded in parallel through a continuous fuse (2), and the single battery electrodes and the fuses (2) are welded through ultrasonic waves; and ultrasonic welding is performed between the aluminum plate surface and the fuse (2).
6. The power battery pack according to claim 5, wherein: each single battery electrode is fixedly connected with the fuse (2) through two-point welding, and the aluminum plate surface is fixedly connected with the fuse (2) through two-point welding.
7. The power battery pack according to claim 5, wherein: the fuse (2) is a pure aluminum wire.
8. The power battery pack according to claim 5, wherein: the ultrasonic bonding pads are bonding pads coated with an electrical contact conductive paste or silver paste.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610274669.9A CN107331826B (en) | 2016-04-28 | 2016-04-28 | Connection method of power battery pack and battery pack produced by using same |
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| US20200036067A1 (en) * | 2018-07-26 | 2020-01-30 | GM Global Technology Operations LLC | Battery module and method of forming a battery module housing |
| CN111540944A (en) * | 2019-09-20 | 2020-08-14 | 杭州乾代科技有限公司 | Assembled lithium battery module |
| CN110890578B (en) * | 2019-09-20 | 2021-10-29 | 杭州乾代科技有限公司 | Method for manufacturing battery module |
| CN111049216B (en) * | 2019-12-13 | 2021-10-08 | 惠州市亿鹏能源科技有限公司 | Lithium ion power battery power supply device |
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