CN111370611A - Power battery module - Google Patents
Power battery module Download PDFInfo
- Publication number
- CN111370611A CN111370611A CN202010187897.9A CN202010187897A CN111370611A CN 111370611 A CN111370611 A CN 111370611A CN 202010187897 A CN202010187897 A CN 202010187897A CN 111370611 A CN111370611 A CN 111370611A
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- CN
- China
- Prior art keywords
- module
- power battery
- frame
- module frame
- battery cell
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—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
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
-
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a power battery module, which comprises a module frame and a plurality of battery cell modules arranged in the module frame, wherein a module insulating part, a copper bar and a sampling assembly are arranged between two ends of each battery cell module and an end plate, the module frame is formed by mutually laser welding a bottom shell, an upper cover, the end plates and side plates, each battery cell module is formed by stacking a plurality of battery cells, foam cotton is arranged on two sides of each battery cell, and mica sheets are arranged on two sides of each battery cell module. The power battery module adopts a light-weight design idea, and a heat dissipation aluminum plate and a BLOCK frame are omitted, so that a heat conduction path is optimized, the grouping rate is improved, and the grouping rate of the module is up to 90%.
Description
Technical Field
The invention belongs to the technical field of battery systems in the new energy automobile industry, and particularly relates to a power battery module.
Background
The new energy automobile adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, and forms an automobile with advanced technical principle, new technology and new structure.
In recent years, people pay more attention to environmental problems due to continuous haze in main cities in China, and under the background, new energy vehicles mainly based on hybrid power and pure electric power are pushed out by vehicle enterprises at home and abroad, and governments also issue related policies of subsidy and registration of new energy vehicles, so that a green channel is opened for development of new energy vehicles. Various new energy enterprises at home and abroad also carry out targeted research on new energy technology and launch advanced technology. The development of module technology is also very fast, and behind the standard VDA module, the module of bigger size is more and more favored with its higher energy density, but the scheme to the safety protection design of big module and thermal management is all not as mature as far as possible, can not satisfy the requirement, has seriously restricted the development of new energy automobile.
Disclosure of Invention
In view of the above, the present invention provides a power battery module to solve the technical problems of insufficient safety protection and incomplete thermal management of a large module.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a power battery module, includes the module frame and installs a plurality of electricity core module in the module frame, be provided with module insulating part, copper bar and sampling subassembly between the both ends of electricity core module and the end plate, the module frame is formed by the mutual laser welding of drain pan, upper cover, end plate and curb plate, electricity core module piles up by a plurality of electricity core and forms, every the both sides of electricity core all are provided with the bubble cotton, every group electricity core module both sides are provided with the mica sheet.
Furthermore, the module frame is filled with heat-conducting structural adhesive, the heat-conducting coefficient of the heat-conducting structural adhesive is 0.6-1.2, and the tensile strength of the heat-conducting structural adhesive is greater than 2 mp.
Furthermore, the thickness of the foam between the two adjacent battery cells is smaller than the thickness of the foam on the two sides of the battery cell module.
Further, install the bubble cotton between the upper cover of module frame and the electric core module.
Furthermore, a plurality of reinforcing ribs are arranged on the bottom shell of the module frame, and the reinforcing ribs, the end plate, the upper cover and the bottom shell are all processed in a laser welding mode.
Furthermore, the end plates and the side plates in the module frame are all aluminum alloy extruded parts, and the bottom shell and the upper cover are all aluminum alloy stamped parts.
Further, the module frame is a coating with the surface sprayed with electrostatic spraying.
Further, the sampling assembly is an FPC flexible circuit board.
Compared with the prior art, the power battery module provided by the invention has the following advantages:
(1) the power battery module adopt a light-weight design idea, a heat dissipation aluminum plate and a BLOCK frame are omitted, a heat conduction path is optimized, the grouping rate is improved, and the grouping rate of the module is up to 90%.
(2) The power battery module adopts a glue filling mode, elements such as the battery core, the module frame and the copper bar are all bonded into a whole, the mode and the rigidity of the module are improved, the mechanical safety is greatly improved, and the cost of a large module structure is also reduced.
(3) The power battery module integrated PACK provided by the invention adopts shell welding, cell bonding and integrated colloid connection modes to form a unified integrated structure, so that the safety, heat management and performance are obviously improved, and the material variety of the integrated PACK is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
fig. 1 is an exploded view of a power battery module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a cell module according to an embodiment of the present invention.
Description of reference numerals:
1. an upper cover; 2. soaking cotton; 3. an FPC flexible circuit board; 4. a cell module; 5. a module insulator; 6. copper bars; 7. an end plate; 8. a bottom case; 9. reinforcing ribs; 10. heat-conducting structural adhesive; 11. a side plate; 12. an electric core; 13. mica sheet.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
As shown in fig. 1, the power battery module belongs to the category of large modules, the size of the module is about 900mm × 500mm × 100mm, or larger than the size, the main structure of the power battery module comprises a module frame and a plurality of battery cell modules 4 installed in the module frame, and module insulators 5, copper bars 6 and sampling assemblies are arranged between two ends of each battery cell module 4 and end plates 7 of the module frame.
Specifically, the module frame is formed by laser welding the bottom case 8, the upper cover 1, the end plate 7, and the side plate 11 to each other. A plurality of reinforcing ribs 9 are arranged on the bottom shell 8 of the module frame, and the reinforcing ribs 9, the end plate 7, the upper cover 1 and the bottom shell 8 are all processed in a laser welding mode. The reinforcing ribs 9 increase the strength, mode and safety performance of the whole module. The bottom shell 8, the upper cover 1, the end plate 7, the side plate 11 and the reinforcing ribs 9 in the module frame are all aluminum alloy extruded pieces. Not only ensures the structural strength, but also ensures the planeness.
The battery cell module is formed by stacking a plurality of battery cells 12, the two sides of each battery cell 12 are provided with foam 2, and the two sides of each battery cell module 4 are provided with mica sheets 13. The thickness of the foam 2 between two adjacent battery cells 12 is smaller than the thickness of the foam 2 at two sides of the battery cell module 4. Foam 2 is also installed between the upper cover 1 of the module frame and the battery cell module 4. The foam 2 of thickness is increased to every module both sides, prevents that laser welding's heat from damaging electric core. Specifically, in this embodiment, there are 4 cell modules in the module, as shown in fig. 2, each module of the cell is composed of mica sheet, foam, and cell. In order to delay thermal runaway and obstruct the influence of heat generated by laser welding on the battery cell, mica sheets 13 are additionally arranged on two sides of each module; in order to absorb the expansion of the cells 12 and provide buffer and heat insulation, a piece of foam 2 is added between every two cells; because carry out laser welding between module drain pan and the upper cover, in order to avoid the too high damage electric core of heat during the welding, consequently the bubble of every module both sides is cotton 2 to be thicker than the bubble between electric core 12. The selection principle of the foam 2 is as follows: 1. in the whole life cycle of the battery cell, the foam has acting force on the battery cell; 2. the foam is in the elastic section in the whole life cycle of the battery core; 3. the acting force generated by the foam is smaller than the force which can be born by the module frame. Because the foam is added between the electric cores, the electric cores are provided with sufficient breathing space, the electric cores can be ensured to be in 80% space, the free space of uniform force variable displacement is realized, and the cycle performance of the electric cores is ensured.
The module frame is filled with heat-conducting structural adhesive 10, the heat-conducting coefficient of the heat-conducting structural adhesive 10 is 0.6-1.2, and the tensile strength is greater than 2 mp. Before electric core module got into the module frame, glue the processing of precoating to the module frame, and the rubber coated kind is glued for the heat conduction structure, can enough heat conduction and heat dissipation, has increased the structural strength of module again, has improved the mode of module. In order to prevent the glue from flowing everywhere, the paste-shaped glue with higher viscosity coefficient is selected, and the heat-conducting structural glue 10 firmly fixes the battery cell on the module frame. The reasonable type selection of the heat-conducting structural adhesive 10 can reduce the thermal resistance to be controlled below 1, and has simple structural mode and high process feasibility.
The module frame is a coating with electrostatic spraying on the surface. In order to ensure insulation, the surface of the module frame is subjected to electrostatic spraying, and the voltage resistance is ensured to be 2700V.
As a preferable solution of this embodiment, the sampling component is an FPC flexible circuit board. Due to the adoption of the FPC, the space utilization rate is increased, the safety and the reliability are realized, the assembly is simplified, the connection is reliable and simple, and the manufacturability is strong.
The installation process created by the invention is as follows:
the bottom shell, the side plates and the side plates of the module frame are welded into a whole in a laser welding mode, and electrostatic spraying treatment is carried out to ensure that the voltage resistance is 2700V; pre-coating the module frame before the module enters the module frame; after the battery cell modules are stacked, the battery cell modules are placed into the module frame; after the module is placed into the shell, standing is carried out, after the glue surface is dried, the module insulation piece and the copper bar are installed, and hot melting preassembly is carried out on the module insulation piece and the copper bar. After copper bar and insulating part installation are accomplished, carry out utmost point ear welding, utmost point ear welding is accomplished the back, installs FPC, and the module sampling adopts FPC's form, has improved space utilization, for guaranteeing safety, and every cluster FPC all clusters have insurance.
And after the FPC is welded, mounting the front and rear end plates and the upper cover, and welding. Because the space is compact, the distance is very close between the electric core utmost point ear of front and back end plate and the polyphone of module, and in order to guarantee to insulate, the front and back end plate carries out electrostatic spraying and guarantees to be insulating, and withstand voltage can guarantee 2700V. And the front end plate and the rear end plate are subjected to laser welding with the module frame, and the position of the laser welding is avoided at the position of electrostatic spraying. In order to ensure the module mode and increase the reliability and stability, the module frame and the upper cover are subjected to laser welding.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a power battery module which characterized in that: including the module frame and install a plurality of electricity core module in the module frame, be provided with module insulating part, copper bar and sampling subassembly between the both ends of electricity core module and the end plate, the module frame is formed by drain pan, upper cover, end plate and the mutual laser welding of curb plate, electricity core module piles up by a plurality of electricity core and forms, every the both sides of electricity core all are provided with the bubble cotton, every group electricity core module both sides are provided with the mica sheet.
2. The power battery module of claim 1, wherein: and heat conduction structural adhesive is filled in the module frame, the heat conduction coefficient of the heat conduction structural adhesive is 0.6-1.2, and the tensile strength is greater than 2 mp.
3. The power battery module of claim 1, wherein: the thickness of the foam between the two adjacent battery cells is smaller than that of the foam on the two sides of the battery cell module.
4. The power battery module of claim 1, wherein: and foam is arranged between the upper cover of the module frame and the battery cell module.
5. The power battery module of claim 1, wherein: and a plurality of reinforcing ribs are arranged on the bottom shell of the module frame, and the reinforcing ribs, the end plate, the upper cover and the bottom shell are processed in a laser welding mode.
6. The power battery module of claim 1, wherein: the end plates and the side plates in the module frame are all aluminum alloy extruded parts, and the bottom shell and the upper cover are all aluminum alloy stamped parts.
7. The power battery module of claim 1, wherein: the module frame is a coating with the surface sprayed with electrostatic spraying.
8. The power battery module of claim 1, wherein: the sampling assembly is an FPC flexible circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010187897.9A CN111370611A (en) | 2020-03-17 | 2020-03-17 | Power battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010187897.9A CN111370611A (en) | 2020-03-17 | 2020-03-17 | Power battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111370611A true CN111370611A (en) | 2020-07-03 |
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ID=71208908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010187897.9A Pending CN111370611A (en) | 2020-03-17 | 2020-03-17 | Power battery module |
Country Status (1)
| Country | Link |
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| CN (1) | CN111370611A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097595A (en) * | 2021-03-31 | 2021-07-09 | 东莞新能安科技有限公司 | Aircraft subassembly, battery pack and water tank |
| CN114447490A (en) * | 2021-12-16 | 2022-05-06 | 上海兰钧新能源科技有限公司 | Improvement type electricity core module |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097595A (en) * | 2021-03-31 | 2021-07-09 | 东莞新能安科技有限公司 | Aircraft subassembly, battery pack and water tank |
| CN114447490A (en) * | 2021-12-16 | 2022-05-06 | 上海兰钧新能源科技有限公司 | Improvement type electricity core module |
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Application publication date: 20200703 |
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