CN108767151B - Power battery module and liquid cooling system integrated structure - Google Patents
Power battery module and liquid cooling system integrated structure Download PDFInfo
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- CN108767151B CN108767151B CN201810413247.4A CN201810413247A CN108767151B CN 108767151 B CN108767151 B CN 108767151B CN 201810413247 A CN201810413247 A CN 201810413247A CN 108767151 B CN108767151 B CN 108767151B
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- module
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- cooling
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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
- 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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses an integrated structure of a power battery module and a liquid cooling system, which comprises a battery module and a module frame, wherein the battery module is formed by arranging a plurality of monomer battery cores in parallel; the liquid inlet and the liquid outlet are both provided with a flow guide block, the flow guide block is conical, and the conical tip of the flow guide block is arranged outwards. The invention has simple structure and good cooling effect.
Description
The technical field is as follows:
the invention relates to an integrated structure of a power battery module and a liquid cooling system.
Background art:
with the popularization of electric vehicles, a power battery is receiving more and more attention as one of the core technologies of the electric vehicles. The power battery pack needs to have higher output voltage and output power as a power device of the electric automobile. Therefore, the power battery pack is generally composed of a plurality of battery modules connected in series and parallel. Wherein, the battery module is connected in series-parallel by a plurality of monomer electricity cores equally and is constituteed. At present, with the development of electric vehicles and the living and working requirements of people, a power battery pack generally needs to have high-rate safe and efficient charging and discharging performance. The power battery can generate a large amount of heat in the process of high-rate charging or discharging to cause the temperature of the single battery core and the battery module to rise sharply. The battery core temperature is too high, and the charge and discharge performance of the battery is sharply reduced. Meanwhile, the battery is invalid due to the over-high temperature of the battery, and even burns and explodes, so that the safety of the electric automobile and the life and property safety of drivers and passengers are damaged. The safe and efficient power battery thermal management technology is a precondition and guarantee for providing output by a power battery pack.
At present, the commonly used thermal management technologies for power batteries include: air-cooled thermal management, liquid-cooled thermal management and refrigerant direct-cooled thermal management. Among them, the power battery pack is more popular by adopting a liquid cooling method. The liquid cooling type heat management is a heat exchange technology that a cooling working medium takes away heat generated by a battery in the working process through a heat exchange cold plate. The arrangement mode of the cold plate comprises the modes of arrangement at the bottom of the module, arrangement at the side face of the module, large-face fit of the battery to the cold plate and the like. The liquid-cooled thermal management system is usually two independent systems with the battery module, and a battery module cooling system and other electrical systems need to be installed into the battery box body simultaneously in the battery pack assembling process. Because the weight of battery module and the cooperation precision requirement of battery module and cold drawing make the assembling process of liquid cooling type battery package comparatively loaded down with trivial details, the installation effectiveness is low, and the cost of labor is higher relatively. In addition, liquid-cooled thermal management generally includes heat exchange (e.g., bottom heat exchange, end heat exchange, or large-area heat exchange) on one surface of the battery module, which results in low heat exchange efficiency, poor temperature uniformity of the single cell, and poor charging and discharging performance of the cell.
The invention content is as follows:
the invention provides an integrated structure of a power battery module and a liquid cooling system to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: a power battery module and liquid cooling system integrated structure comprises a battery module and a module frame, wherein the battery module is formed by arranging a plurality of single battery cores in parallel, the battery module is arranged in the module frame, a cooling cavity is arranged in the module frame, a liquid inlet and a liquid outlet are arranged on the outer wall of the module frame, and the liquid inlet and the liquid outlet are communicated with the cooling cavity;
the liquid inlet and the liquid outlet are both provided with a flow guide block, the flow guide block is conical, and the conical tip of the flow guide block is arranged outwards.
Furthermore, a lifting lug is arranged on the outer wall of the module frame.
The invention has the following beneficial effects:
1) the battery module and the liquid cooling system are of an integrated structure, and the liquid cooling system runner is arranged inside the end plate and the side plate of the battery module. The heat production accessible module side, terminal surface and the bottom surface of power battery in the charge-discharge process dispel the heat simultaneously, have increased the heat-transfer surface, when strengthening the heat transfer, have increased the temperature homogeneity of battery in the cooling process.
2) The module and the liquid cooling system are combined into one, so that the complexity of the power battery pack is reduced, a larger layout space is vacated for the interior of the power battery pack, and the improvement of the energy density of the power battery pack is facilitated.
3) The module and the liquid cooling system are combined into a whole, the assembly and matching problems of the battery module and the liquid cooling plate in the prior art and the required fixture for installation and matching are eliminated, the power battery pack assembly process is simplified, and the assembly cost is saved.
4) In the invention, the cooling liquid inlet and the cooling liquid outlet are both positioned at the bottom of the end plate of the module. On one hand, the technical scheme simplifies the hoisting of the modules in the battery pack grouping process; on the other hand, the cooling liquid inlet and outlet are all arranged below the module end plate, so that arrangement of a cooling pipeline in the battery pack is facilitated, and the complexity of the cooling pipeline is reduced.
5) In the invention, the cooling liquid inlet and the cooling liquid outlet are both arranged below the module end plate, and in order to ensure the consistency of the flow above and below the module, the working medium passing through the flow passage of the lower side plate of the module reaches the flow passage in the outlet end plate, passes through the upward flow passage and then is converged with the working medium passing through the flow passage of the upper side plate, so that the consistency of the pressure of the working medium in the flow passage of the upper side plate and the pressure of the working medium in the flow passage of the lower side plate is ensured, and the uniformity of cooling.
6) The module bottom plate has the lightening hole, and the accessible increases the heat conduction pad and strengthens battery module and pass through bottom case battery box heat transfer. This scheme strengthens the radiating effect of module when satisfying battery module lightweight.
7) The inlet and the outlet of the module cooling liquid are guided by the guide blocks so as to reduce the local resistance loss of the inlet and the outlet of the cooling liquid and the total pressure loss of the cooling system, thereby reducing the energy consumption of the cooling system.
8) The lugs on the end plates at two ends of the module are U-shaped lugs, the welding positions of the lugs are staggered with the positions of flow channels inside the end plates, stress concentration of the end plates at the positions of the flow channels is avoided, and the structural strength of the end plates is guaranteed.
Description of the drawings:
FIG. 1 is a schematic view of a battery module;
FIG. 2 is a schematic structural view of a module frame according to the present invention;
FIG. 3 is a schematic diagram of a battery fluid cold runner structure and working medium flow;
FIG. 4 is a schematic view of the inlet and outlet diversion structures;
FIG. 5 is a schematic view of the flow of working medium in the inlet double ascending channel structure domain;
fig. 6 is an enlarged plan view of fig. 4.
Wherein:
1-anode pole, 2-cathode pole, 3-module end plate, 4-lifting lug, 5-liquid inlet, 6-module upper side plate, 7-battery core, 8-module lower side plate, 9-module inner plate, 10-module bottom plate, 11-liquid outlet, 12-inlet ascending flow channel, 13-upper side plate flow channel, 14-lower side plate flow channel, 15-outlet descending flow channel, 16-outlet ascending flow channel and 17-flow guide block.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 6, the power battery module and liquid cooling system integrated structure of the present invention includes a battery module and a module frame, wherein the battery module is formed by arranging a plurality of single battery cells 7 in parallel, the battery module is disposed in the module frame, a cooling cavity is disposed in the module frame, a liquid inlet 5 and a liquid outlet 11 are disposed on an outer wall of the module frame, and the liquid inlet 5 and the liquid outlet 11 are communicated with the cooling cavity; flow guide blocks 17 are arranged in the liquid inlet 5 and the liquid outlet 11, the flow guide blocks 17 are conical, and the conical tips of the flow guide blocks 17 are arranged outwards.
The outer wall of the module frame is provided with a lifting lug 4.
The module end plate 3 and the side plate are internally provided with cavity runners which are communicated with each other. The cavity flow channel is formed by matching each end plate, each side plate and the module inner plate. And a cooling working medium inlet and a cooling working medium outlet are arranged below the end plates at the two ends of the module.
During the working process of the cooling system, a cooling working medium enters from a liquid inlet 5 at one end of the module and flows to an inlet ascending flow channel 12 and lower side plate flow channels 14 at two sides respectively. When the cooling working medium in the ascending flow channel at the inlet end reaches the top of the flow channel, the cooling working medium respectively flows to the side plate flow channels 13 on the two sides of the module and finally flows to the end plate inner flow channel at the outlet end. Working media in the flow channels of the lower side plates on the two sides flow into the flow channel in the end plate at the outlet end, then enter the upstream flow channel 16 at the outlet end, are mixed with the working media flowing in the upper side plates on the two sides of the module, then enter the downstream flow channel 15 at the outlet end, and flow out of the module through the liquid outlet 11. The flow of the cooling medium is shown in figure 3. The single batteries are arranged in parallel in the module frame and are jointed with the module end plate, the side plate and the bottom plate or are tightly jointed through the heat conducting pad. The heat generated by the battery in the charging and discharging process is transferred to the module end plate, the side plate and the bottom plate through heat conduction. The cooling working medium gathers the process of flowing through the end plate and the side plate inner flow channel and brings the heat out of the battery module through heat convection, thereby achieving the effect of cooling the battery core. In the invention, the parts directly attached to the battery core or attached to the battery core through the heat conducting pad are cooling parts, the module cooling part is provided with a bottom, an upper side surface, a lower side surface and two end surfaces, the module cooling area is large, and the temperature uniformity is high.
At the cooling inlet and outlet, there is a large local loss of resistance when the cooling operation flows through the inlet and outlet due to the vertical turning of the flow channel. In order to reduce the problem of overlarge local resistance loss at the inlet and the outlet, a 'cone-like' type flow guide block is additionally arranged inside the liquid inlet and the liquid outlet, so that the flow guide and drainage effects on the cooling working medium entering or flowing out are achieved, and the resistance loss at the position is reduced. The flow guiding conditions of the liquid inlet and the liquid outlet are shown in fig. 4, and the curved surface of the cone-like flow guiding block is a hyperboloid.
According to the invention, on the premise of meeting the structural strength and rigidity of the module, the weight reducing holes are formed at two ends of the module bottom plate, so that the weight of the module is reduced, and the energy density of the power battery pack is improved. The heat conducting pad can be added at the lightening hole of the bottom plate, so that the heat transfer from the module to the battery box body is enhanced, and the cooling effect of the battery module is enhanced.
The module end plate 3 and the side plates (6 and 8) are formed by two layers of structures, and the end plate and the side plates with the flow channel grooves and the module inner plate form a closed inner flow channel space together. The module bottom plate 10 is provided with lightening holes. The lower side plate is of an L-shaped structure to support the battery cell inside the module. The U-shaped lifting lugs 4 are welded on the end plates at the two ends of the module respectively and used for hoisting the module, the welding positions of the lifting lugs and the positions of the internal flow channels are staggered, and stress concentration of the end plates at the flow channels is avoided. A cooling liquid inlet 5 and a cooling liquid outlet 11 are respectively arranged below the end plates at the two sides, two cone-like flow guide blocks 17 are arranged in the liquid inlet and the liquid outlet, and as shown in the attached figure 4, the flow guide blocks and the module inner plate are of an integrated structure. The cooling liquid enters from the liquid inlet and respectively flows to the module lower side plate flow channel 14 and the inlet ascending flow channel 12, and the cooling liquid in the lower side plate flow channel enters the outlet ascending flow channel 16 after entering the outlet end plate inner flow channel. The cooling liquid in the inlet ascending flow channel enters the upper side plate flow channel 13, finally enters the outlet end plate inner flow channel and converges with the cooling working medium in the outlet ascending flow channel, and the cooling working medium enters the outlet descending flow channel 15 and flows out of the module through the liquid outlet 11.
On the basis of embodiment 1, in order to enhance the heat exchange between the working medium in the flow channel in the end plate and the battery module, the flowing condition of the cooling working medium is shown in fig. 5. The liquid inlet end plate inner flow channel adopts a one-to-two structure, the cooling working medium flows to two sides of the battery module respectively, the two sides of the battery module are divided into two parts respectively, one part of the fluid flows to the module lower side plate flow channel, the other part of the fluid flows to the end plate inlet ascending flow channel 12, and the cooling liquid in the ascending flow channels at two sides respectively flows to the battery module upper side plate flow channels at two sides. Other flow path structures and end plate side plates and the like were the same as those of example 1.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (2)
1. The utility model provides a power battery module and liquid cooling system integral structure, includes battery module and module frame, the battery module is formed by a plurality of monomer electricity core (7) parallel arrangement, and the battery module is arranged in the module frame, its characterized in that: a cooling cavity is arranged in the module frame, a liquid inlet (5) and a liquid outlet (11) are arranged on the outer wall of the module frame, and the liquid inlet (5) and the liquid outlet (11) are communicated with the cooling cavity;
the liquid inlet (5) and the liquid outlet (11) are both internally provided with a flow guide block (17), the flow guide block (17) is conical, and the conical tip of the flow guide block (17) is arranged outwards;
the battery module includes the module inner panel, module end plate (3), the curb plate, lower side plate runner (14), import runner (12) on going, export runner (16) and export runner (15) down going, module end plate (3) and curb plate are two-layer structure and constitute, water conservancy diversion piece (17) and module inner panel structure as an organic whole, coolant liquid inlet (5) and liquid outlet (11) are located both sides module end plate (3) below respectively, coolant liquid gets into from inlet (5), flow to lower side plate runner (14) and import runner (12) on going respectively, coolant liquid in lower side plate runner (14) gets into export runner (16) on going, coolant liquid in import runner (12) and the cooling medium that exports runner (16) on going to flow together and get into export runner (15) down flowing battery module through liquid outlet (11).
2. The power battery module and liquid cooling system integrated structure of claim 1, wherein: the outer wall of the module frame is provided with a lifting lug (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413247.4A CN108767151B (en) | 2018-05-03 | 2018-05-03 | Power battery module and liquid cooling system integrated structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413247.4A CN108767151B (en) | 2018-05-03 | 2018-05-03 | Power battery module and liquid cooling system integrated structure |
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| Publication Number | Publication Date |
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| CN108767151A CN108767151A (en) | 2018-11-06 |
| CN108767151B true CN108767151B (en) | 2021-06-22 |
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| CN201810413247.4A Active CN108767151B (en) | 2018-05-03 | 2018-05-03 | Power battery module and liquid cooling system integrated structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114552053B (en) * | 2021-09-08 | 2023-09-05 | 万向一二三股份公司 | High-integration battery pack |
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| CN106641349A (en) * | 2016-11-29 | 2017-05-10 | 福建工程学院 | Streamline type fluid unidirectional flowing device |
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| CN107029572A (en) * | 2017-05-08 | 2017-08-11 | 宁波筑鸿纳米科技有限公司 | A kind of nanoscale fluid mixer and nanoscale fluid mixer |
| CN107331812A (en) * | 2017-07-17 | 2017-11-07 | 苏州安靠电源有限公司 | Battery case with heat exchange function |
| CN206878137U (en) * | 2017-03-23 | 2018-01-12 | 上海工程技术大学 | A kind of automobile power cell bidirectional temp regulation and thermal runaway non-proliferation structure |
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2018
- 2018-05-03 CN CN201810413247.4A patent/CN108767151B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205036593U (en) * | 2015-10-15 | 2016-02-17 | 山东双轮股份有限公司 | High -efficient clog -free sewage cutting pump |
| CN106337941A (en) * | 2016-10-10 | 2017-01-18 | 中国矿业大学 | Self-heat-dissipation pressure reducing valve |
| CN106641349A (en) * | 2016-11-29 | 2017-05-10 | 福建工程学院 | Streamline type fluid unidirectional flowing device |
| CN106838382A (en) * | 2016-12-15 | 2017-06-13 | 安徽江南泵阀有限公司 | Check-valves |
| CN206878137U (en) * | 2017-03-23 | 2018-01-12 | 上海工程技术大学 | A kind of automobile power cell bidirectional temp regulation and thermal runaway non-proliferation structure |
| CN107029572A (en) * | 2017-05-08 | 2017-08-11 | 宁波筑鸿纳米科技有限公司 | A kind of nanoscale fluid mixer and nanoscale fluid mixer |
| CN107331812A (en) * | 2017-07-17 | 2017-11-07 | 苏州安靠电源有限公司 | Battery case with heat exchange function |
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| CN108767151A (en) | 2018-11-06 |
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