CN114243160B - Integrated manufacturing method of new energy battery box body and liquid cooling plate - Google Patents
Integrated manufacturing method of new energy battery box body and liquid cooling plate Download PDFInfo
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- CN114243160B CN114243160B CN202111577666.XA CN202111577666A CN114243160B CN 114243160 B CN114243160 B CN 114243160B CN 202111577666 A CN202111577666 A CN 202111577666A CN 114243160 B CN114243160 B CN 114243160B
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- cooling plate
- liquid cooling
- new energy
- battery box
- energy battery
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- 238000001816 cooling Methods 0.000 title claims abstract description 126
- 239000007788 liquid Substances 0.000 title claims abstract description 105
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005219 brazing Methods 0.000 claims abstract description 55
- 238000003466 welding Methods 0.000 claims abstract description 32
- 230000004907 flux Effects 0.000 claims abstract description 27
- 238000005507 spraying Methods 0.000 claims abstract description 22
- 238000005485 electric heating Methods 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052792 caesium Inorganic materials 0.000 claims abstract description 14
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000679 solder Inorganic materials 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 15
- 239000000047 product Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum-manganese Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing 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
- 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
- H01M10/04—Construction or manufacture in general
-
- 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides an integrated manufacturing method of a new energy battery box body and a liquid cooling plate, which belongs to the field of new energy batteries, and comprises the steps of cleaning the liquid cooling plate, spraying brazing flux containing cesium solder on the surface of the liquid cooling plate, positioning and placing a new energy battery box body frame and the liquid cooling plate, then putting the new energy battery box body frame and the liquid cooling plate into an electric heating radiation brazing furnace for brazing by adopting nitrogen protection, so that the new energy battery box body frame and the liquid cooling plate are welded together, carrying out shear strength test on the new energy battery box body frame and the liquid cooling plate, and judging the welding strength of the new energy battery box body frame and the liquid cooling plate.
Description
Technical Field
The invention relates to the field of new energy batteries, in particular to an integrated manufacturing method of a new energy battery box body and a liquid cooling plate.
Background
Along with the continuous development of the automobile industry, the development of the new energy automobile is also rapid, and the battery in the new energy automobile is very important, and the new energy battery comprises a box body, wherein the box body is used for installing the battery, the battery is easy to generate heat, and a liquid cooling plate is required to be used for cooling the battery in the box body. At present, the integration mode of the liquid cooling plate and the box body is mainly as follows: 1. the prior art of hot-melt rivets is more in application, the mass production of each rivet needs about 5 seconds, 60 or more rivets are conventionally needed, and the equipment investment and the part cost are high. The sealing uses double-component sealant, and the air tightness and the durability are general. 2. Friction stir welding has high processing precision requirement, low mass production efficiency and relatively few current applications. The prior art patent CN210956799U discloses a box body structure of a power battery pack, and discloses that the whole box body mainly adopts a brazing process, so that the use of friction stir welding is reduced, the whole weight of the box body and a liquid cooling system is reduced, the cost can be reduced to a certain extent, and the production efficiency is improved; the problem of present aluminium box adopts friction stir welding technology, and production efficiency is low, the cost is higher is solved, can realize the lightweight design of battery package box to a certain extent simultaneously. The patent discloses that the box body adopts a brazing process, but the new energy battery box body is made of 6-series aluminum-silicon alloy, the liquid cooling plate is made of 3-series aluminum-manganese alloy, the two are brazed, and the welding effect of the two can be achieved only by selecting the welding flux, so that the problem is very necessary to be solved.
Disclosure of Invention
In order to solve the problems, the invention provides an integrated manufacturing method of a new energy battery box body and a liquid cooling plate, which comprises the steps of cleaning the liquid cooling plate, spraying brazing flux containing cesium solder on the surface of the liquid cooling plate, positioning and placing a new energy battery box body frame and the liquid cooling plate, then putting the new energy battery box body frame and the liquid cooling plate into an electric heating radiation brazing furnace for brazing by adopting nitrogen protection, so that the new energy battery box body frame and the liquid cooling plate are welded together, carrying out shear strength test on the new energy battery box body frame and the liquid cooling plate, and judging the welding strength of the new energy battery box body frame and the liquid cooling plate.
The invention aims to provide an integrated manufacturing method of a new energy battery box body and a liquid cooling plate, which comprises the following steps:
step one: spraying a brazing flux on the surface of the cleaned liquid cooling plate meeting the specification, wherein the brazing flux is cesium-containing solder;
step two: after the new energy battery box frame and the liquid cooling plate are positioned and placed through a tool, the new energy battery box frame and the liquid cooling plate are put into an electric heating radiation brazing furnace to be heated to the melting temperature of brazing flux, gaps between the new energy battery box frame and the liquid cooling plate are filled with cesium-containing brazing filler metal to enable the new energy battery box frame and the liquid cooling plate to be connected together, and the electric heating radiation brazing furnace is protected by adopting continuous nitrogen;
step three: after brazing, the welded new energy battery box frame and the liquid cooling plate are cooled, so that integration is achieved, and then the new energy battery box frame and the liquid cooling plate are subjected to shear strength test.
The further improvement is that: the welding temperature of the electric heating radiation brazing furnace is 580-630 ℃; the heating areas are divided into a top heating area and a bottom heating area, the heating power of the top heating area is 40 percent, the bottom heating area is 60 percent, and the new energy battery box body frame and the liquid cooling plate are transported to the middle part in the electric heating radiation brazing furnace through a conveyer belt.
The further improvement is that: the step one of cleaning the liquid cooling plate is as follows: deoiling, hot water spraying, normal temperature spraying, air cutting and drying, and then spraying brazing flux on the surface of the liquid cooling plate.
The further improvement is that: the brazing flux sprayed on the surface of the liquid cooling plate is as follows: a continuous brazing flux spraying device is adopted, the aperture of a needle hole of a spray gun of the device is 1.2mm, the surface of a liquid cooling plate is sprayed with uniform cesium-containing solder, and then the liquid cooling plate is self-dried by using the waste heat of the liquid cooling plate.
The further improvement is that: and polishing the surface of the new energy battery box body frame to remove an oxide layer, and cleaning the new energy battery box body frame.
The further improvement is that: the shear strength test is: and vertically placing the welded new energy battery box frame and the liquid cooling plate, and applying pressure to the liquid cooling plate to perform shear strength test.
The further improvement is that: and step two, after the new energy battery box body frame and the liquid cooling plate are positioned and placed, drying is carried out through a drying furnace, and then heating is carried out in an electric heating radiation brazing furnace.
The further improvement is that: and step three, the cooling of the new energy battery box body frame and the liquid cooling plate is as follows: the cooling is performed by the static cooling chamber, and then the cooling is performed by the wind cooling chamber.
The further improvement is that: and step three, after cooling, sequentially performing size detection, airtight helium detection and shear strength test, and finally performing paint spraying-rechecking packaging.
The invention has the beneficial effects that: 1. according to the invention, the liquid cooling plate is cleaned, the surface of the liquid cooling plate is sprayed with the brazing flux containing cesium solder, then the new energy battery box frame and the liquid cooling plate are positioned and placed in the electric heating radiation brazing furnace to be brazed under the protection of nitrogen, so that the liquid cooling plate and the new energy battery box frame are welded together, the shearing strength test is carried out on the liquid cooling plate and the liquid cooling plate, and the welding strength of the liquid cooling plate and the liquid cooling plate is judged.
2. The welding temperature of the electric heating radiation brazing furnace is 580-630 ℃, the welding is positioned in the middle part of the furnace, the heating power at the top is 40%, and the heating power at the bottom is 60%, so that the side of the liquid cooling plate sprayed with the brazing flux is heated more at the bottom, the heating effect is better, and the welding effect is better.
3. The liquid cooling plate removes grease dirt on the paint surface through degreasing spraying, hot water spraying, normal-temperature spraying, air cutting and drying, is not influenced by impurities, and further improves the welding effect.
4. The liquid cooling plate spray brazing flux is sprayed by adopting the spray gun with the pinhole aperture of 1.2mm, so that the spray is uniform, and the spray brazing flux is dried, so that the liquid cooling plate self-residual heat can be utilized to self-dry the brazing flux, the effect is good, and the cost is saved.
5. According to the invention, the new energy battery box frame is polished, cleaned and oxidized before welding, so that the welding effect is ensured, the new energy battery box frame and the liquid cooling plate are positioned and placed, then are dried by a drying furnace and welded, and the drying can be performed to remove water and also can be performed to preheat, so that the welding effect is further ensured.
6. After the welding, the invention firstly carries out static cooling and then air cooling, so that the welding cannot be carried out quickly by a vertical horse, the welding cannot be impacted by low temperature, and the welding strength effect is ensured.
7. According to the invention, an airtight helium test is performed between shear strength tests, and the air tightness is detected, so that the product is further ensured to be qualified, and the final product yield is high.
Detailed Description
The present invention will be further described in detail with reference to examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
The embodiment provides an integrated manufacturing method of a new energy battery box body and a liquid cooling plate, which comprises the following steps:
s1: liquid cooling plates meeting product specifications are taken, and are cleaned: deoiling, hot water spraying, normal temperature spraying, air cutting and drying; therefore, the welding process is not influenced by impurities, and the welding effect is further improved;
s2: then, spraying a brazing flux containing cesium solder on the surface of the liquid cooling plate: adopting a continuous brazing flux spraying device, wherein the aperture of a needle hole of a spray gun of the device is 1.2mm, spraying cesium-containing solder uniformly on the surface of a liquid cooling plate, and then performing self-drying by utilizing the waste heat of the liquid cooling plate; the spraying is uniform, and the brazing flux is sprayed after being dried, so that the brazing flux can be self-dried by utilizing the waste heat of the liquid cooling plate, the effect is good, and the cost is saved;
s3: polishing the surface of the new energy battery box body frame to remove an oxide layer, and cleaning the oxide layer to ensure the welding effect;
s4: after the new energy battery box body frame and the liquid cooling plate are positioned and placed, drying is carried out through a drying furnace, and the drying can be carried out firstly to remove water or preheat, so that the welding effect is further ensured;
s5: after the energy battery box frame and the liquid cooling plate are positioned by the fixture, the energy battery box frame and the liquid cooling plate are put into an electric heating radiation brazing furnace for heating to the melting temperature of brazing flux, and gaps between the new energy battery box frame and the liquid cooling plate are filled by cesium-containing brazing filler metal to connect the energy battery box frame and the liquid cooling plate together, and the electric heating radiation brazing furnace is protected by adopting continuous nitrogen;
s6: after brazing, the welded new energy battery box body frame and the liquid cooling plate are cooled, so that integration is realized:
firstly, cooling is carried out through a static cooling chamber and then through an air cooling chamber, so that rapid cooling is not carried out by a vertical horse after welding, low-temperature impact is avoided, and the welding strength effect is ensured;
s7: after cooling, firstly performing size detection, then performing airtight helium detection, ensuring that the product is qualified, and enabling the yield of the final product to be high;
s8: and then, carrying out shear strength test on the new energy battery box frame and the liquid cooling plate: placing the welded new energy battery box body frame and the liquid cooling plate vertically, and applying pressure to the liquid cooling plate to perform shear strength test;
s9: finally, paint spraying and rechecking packaging are carried out.
The welding temperature of the electric heating radiation brazing furnace is 580-630 ℃; the heating area is divided into a top heating area and a bottom heating area, the heating power of the top heating area is 40 percent, the bottom heating area is 60 percent, and the new energy battery box body frame and the liquid cooling plate are transported to the middle part in the electric heating radiation brazing furnace through a conveyer belt; the heating makes the liquid cooling plate spray coated with the brazing flux and the bottom side heated more, so that the heating effect is better and the welding effect is better.
According to the embodiment, the liquid cooling plate is cleaned, the surface of the liquid cooling plate is sprayed with the brazing flux containing cesium solder, then the new energy battery box frame and the liquid cooling plate are placed in the electric heating radiation brazing furnace after being positioned, the new energy battery box frame and the liquid cooling plate are brazed by adopting nitrogen protection, so that the new energy battery box frame and the liquid cooling plate are welded together, shear strength tests are carried out on the new energy battery box frame and the liquid cooling plate, and the welding strength of the new energy battery box frame and the liquid cooling plate are judged.
In the embodiment, the new energy battery box body frame and the liquid cooling plate which are welded together are vertically placed, the liquid cooling plate is subjected to shear strength test by applying 96.31KN pressure, and the test result shows that the product is deformed but the shearing direction is not separated; therefore, the cesium-containing solder and the method have the advantages of extremely high welding strength and improved welding efficiency.
Claims (6)
1. The integrated manufacturing method of the new energy battery box body and the liquid cooling plate is characterized by comprising the following steps of: the method comprises the following steps:
step one: spraying a brazing flux on the surface of the cleaned liquid cooling plate meeting the specification, wherein the brazing flux is cesium-containing solder;
step two: after the new energy battery box frame and the liquid cooling plate are positioned and placed through a tool, the new energy battery box frame and the liquid cooling plate are put into an electric heating radiation brazing furnace to be heated to the melting temperature of brazing flux, gaps between the new energy battery box frame and the liquid cooling plate are filled with cesium-containing brazing filler metal to enable the new energy battery box frame and the liquid cooling plate to be connected together, and the electric heating radiation brazing furnace is protected by adopting continuous nitrogen;
step three: after brazing, cooling the welded new energy battery box frame and the liquid cooling plate, so that integration is realized, and then, carrying out shear strength test on the new energy battery box frame and the liquid cooling plate;
the welding temperature of the electric heating radiation brazing furnace is 580-630 ℃; the heating area is divided into a top heating area and a bottom heating area, the heating power of the top heating area is 40 percent, the bottom heating area is 60 percent, and the new energy battery box body frame and the liquid cooling plate are transported to the middle part in the electric heating radiation brazing furnace through a conveyer belt;
the step one of cleaning the liquid cooling plate is as follows: deoiling, hot water spraying, normal temperature spraying, air cutting and drying, and then spraying brazing flux on the surface of the liquid cooling plate; the brazing flux sprayed on the surface of the liquid cooling plate is as follows: a continuous brazing flux spraying device is adopted, the aperture of a needle hole of a spray gun of the device is 1.2mm, the surface of a liquid cooling plate is sprayed with uniform cesium-containing solder, and then the liquid cooling plate is self-dried by using the waste heat of the liquid cooling plate.
2. The integrated manufacturing method of the new energy battery box body and the liquid cooling plate as claimed in claim 1, wherein the integrated manufacturing method is characterized in that: and polishing the surface of the new energy battery box body frame to remove an oxide layer, and cleaning the new energy battery box body frame.
3. The integrated manufacturing method of the new energy battery box body and the liquid cooling plate as claimed in claim 1, wherein the integrated manufacturing method is characterized in that: the shear strength test is: and vertically placing the welded new energy battery box frame and the liquid cooling plate, and applying pressure to the liquid cooling plate to perform shear strength test.
4. The integrated manufacturing method of the new energy battery box body and the liquid cooling plate as claimed in claim 1, wherein the integrated manufacturing method is characterized in that: and step two, after the new energy battery box body frame and the liquid cooling plate are positioned and placed, drying is carried out through a drying furnace, and then heating is carried out in an electric heating radiation brazing furnace.
5. The integrated manufacturing method of the new energy battery box body and the liquid cooling plate as claimed in claim 1, wherein the integrated manufacturing method is characterized in that: and step three, the cooling of the new energy battery box body frame and the liquid cooling plate is as follows: the cooling is performed by the static cooling chamber, and then the cooling is performed by the wind cooling chamber.
6. The integrated manufacturing method of the new energy battery box body and the liquid cooling plate as claimed in claim 5, wherein the integrated manufacturing method is characterized in that: and step three, after cooling, sequentially performing size detection, airtight helium detection and shear strength test, and finally performing paint spraying-rechecking packaging.
Priority Applications (1)
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| CN202111577666.XA CN114243160B (en) | 2021-12-22 | 2021-12-22 | Integrated manufacturing method of new energy battery box body and liquid cooling plate |
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| CN202111577666.XA CN114243160B (en) | 2021-12-22 | 2021-12-22 | Integrated manufacturing method of new energy battery box body and liquid cooling plate |
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| CN114243160A CN114243160A (en) | 2022-03-25 |
| CN114243160B true CN114243160B (en) | 2024-02-20 |
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| CN210956799U (en) * | 2019-12-27 | 2020-07-07 | 芜湖天量电池系统有限公司 | Power battery package box structure |
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| CN113140850A (en) * | 2021-03-04 | 2021-07-20 | 厦门海辰新能源科技有限公司 | Battery pack |
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| CN113426600A (en) * | 2021-07-09 | 2021-09-24 | 飞荣达科技(江苏)有限公司 | Method for controlling flux coating amount of brazing liquid cold plate |
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