CN109616715B - Integrated water cooling system of power battery - Google Patents

Integrated water cooling system of power battery Download PDF

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Publication number
CN109616715B
CN109616715B CN201811202943.7A CN201811202943A CN109616715B CN 109616715 B CN109616715 B CN 109616715B CN 201811202943 A CN201811202943 A CN 201811202943A CN 109616715 B CN109616715 B CN 109616715B
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Prior art keywords
water pipe
cooling system
water
water cooling
battery module
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CN201811202943.7A
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CN109616715A (en
Inventor
杨汉波
罗志民
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Lishen Qingdao New Energy Co Ltd
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Lishen Power Battery System Co Ltd
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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
    • 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
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a power battery integrated water cooling system which comprises a lower bottom plate (3) which is horizontally distributed, wherein the top of the lower bottom plate (3) is provided with a groove (30); the water pipes (1) and the heat insulation pads (2) which are distributed in a bent mode are embedded into the grooves (30); the transverse cross-sectional shapes of the water pipe (1) and the heat insulation pad (2) are the same; the upper surface of the water pipe (1) is flush with the upper surface of the lower bottom plate (3); a plurality of battery modules (11) are arranged right above the water pipe (1), and a heat conduction silica gel pad (10) is arranged on the bottom surface of each battery module (11). The invention can ensure the heat dissipation effect of the water cooling structure on the battery module on the basis of ensuring that the installation space and the installation height of the battery module in the electric vehicle are not changed, thereby ensuring the use safety of the battery module, reducing the safety risk of the battery module, being capable of forming industrial scale, being beneficial to wide application and having great production practice significance.

Description

Integrated water cooling system of power battery
Technical Field
The invention relates to the technical field of batteries, in particular to an integrated water cooling system for a power battery.
Background
At present, electric vehicles have been popularized in the market, and batteries are used as core components of electric vehicles to directly determine various index performances of the electric vehicles. Especially the energy density of the battery system, which is increasing year by year, is directly related to the endurance mileage of the electric vehicle.
In order to meet the urgent need of the whole electric vehicle factory for high energy density of the battery system, most of the battery factories increase the capacity of a single cell and increase the energy density of the single cell on the basis of the battery (such as ternary), and along with the increase of the cell volume, such as the increase of the diameter and the height of a round cell, the increase of the thickness and the length of a square cell, the increase of the length and the width of a soft package cell, and the like.
When the weight energy density requirement of above monomer electricity core promotes, along with the promotion of volume energy density (Wh/L), especially electronic passenger car, domestic square battery and module mainly adopt, propose harsher compactibility requirement (reach mm level compression) to battery system space, battery factory and whole car factory of electric motor car mainly realize at present through the structure that reduces the system, especially battery water cooling system arranges in the module below usually, and the water-cooling board occupies high space.
In the face of the fierce competition of the electric vehicle market and the strict limitation of the height of the electric vehicle chassis, the increase of the height of the whole electric vehicle factory on the basis of the original battery module without water cooling is unacceptable, and thus, the battery pack can only save the water cooling space through the inside of the battery pack. Even if the primary battery module has a water cooling structure, because the promotion of electric core capacity and energy, electric core volume increase, the battery heat dissipation capacity also increases, and the water-cooling space has been compressed again in the time of the water-cooling effect requirement reinforcing, if only rely on traditional mode, increase independent water-cooling board between battery and box promptly, must compress current water-cooling plate thickness and water course sectional area, finally influence radiating effect.
Therefore, at present, a technology is urgently needed to be developed, and the heat dissipation effect of the water cooling structure on the battery module can be guaranteed on the basis that the installation space and the installation height of the battery module in the electric vehicle are not changed, so that the use safety of the battery module is guaranteed, and the safety risk of the battery module is reduced.
Disclosure of Invention
In view of the above, the present invention provides an integrated water cooling system for a power battery, which can ensure the heat dissipation effect of a water cooling structure on a battery module in an electric vehicle on the basis of ensuring that the installation space and the installation height of the battery module are not changed, thereby ensuring the use safety of the battery module, reducing the safety risk of the battery module, being capable of forming an industrial scale, being beneficial to wide application, and having great production practice significance.
Therefore, the invention provides a power battery integrated water cooling system which comprises a lower bottom plate, a water cooling system and a water cooling system, wherein the lower bottom plate is horizontally distributed, and the top of the lower bottom plate is provided with a groove;
a bent water pipe and a heat insulation pad are embedded in the groove;
the transverse cross-sectional shapes of the water pipe and the heat insulation pad are the same;
the upper surface of the water pipe is flush with the upper surface of the lower bottom plate;
a plurality of battery modules are arranged right above the water pipe, and a heat conduction silica gel pad is arranged on the bottom surface of each battery module.
Wherein, the outside of a plurality of battery modules, whole power battery integrated water cooling system top cover have.
The top of the water pipe is provided with a plurality of pressing strips which are longitudinally distributed and arranged at intervals;
the left and right side flanges of each pressing strip are respectively welded with the upper surface of the lower bottom plate;
the battery module is fixedly connected with the pressing strip through a bolt.
The front end and the rear end of the lower bottom plate are respectively welded with a front frame and a rear frame;
the left end and the right end of the lower bottom plate are respectively welded with a left frame and a right frame;
and a plurality of hoisting bolts distributed at intervals are respectively arranged on the left frame and the right frame.
Wherein, there are two hangers through bolted connection on the preceding frame.
The left end and the right end of the rear side of the water pipe are respectively provided with a water gap;
the two water ports are respectively communicated with a liquid outlet and a liquid inlet of a water pump through hollow connecting pipelines, and cooling liquid is injected into the water pipes and the connecting pipelines in advance.
Wherein, the outside of the connecting pipeline is connected with the radiator and the heater in series.
Wherein, two ends of the cross-sectional shape of the water pipe are U-shaped.
Compared with the prior art, the power battery integrated water cooling system provided by the invention can ensure the heat dissipation effect of the water cooling structure on the battery module on the basis of ensuring that the installation space and the installation height of the battery module in the electric vehicle are not changed, thereby ensuring the use safety of the battery module, reducing the safety risk of the battery module, being capable of forming industrial scale, being beneficial to wide application and having great production practice significance.
Drawings
Fig. 1 is an exploded schematic view of a three-dimensional structure of an integrated water cooling system for a power battery provided by the invention when an upper cover is not packaged;
fig. 2 is a schematic perspective view of the integrated water cooling system for power battery provided by the invention when the upper cover is not packaged;
fig. 3 is a schematic perspective view of an integrated water cooling system for a power battery according to the present invention when an upper cover is packaged;
fig. 4 is a schematic perspective view of a lower box in the integrated water cooling system for power batteries according to the present invention;
FIG. 5 is a schematic perspective exploded view of the water pipe, the heat insulation mat and the lower bottom plate in the integrated water cooling system for power battery according to the present invention;
FIG. 6 is a schematic perspective view of the assembly of the water pipe, the heat insulation mat and the lower bottom plate in the integrated water cooling system for power battery according to the present invention;
FIG. 7 is a top view of a water pipe in the power battery integrated water cooling system provided by the invention;
FIG. 8 is an enlarged cross-sectional view of a water pipe in the power battery integrated water cooling system provided by the invention;
in the figure, 1 is a water pipe, 2 is a heat insulation pad, 3 is a lower bottom plate, 41 is a left frame, and 42 is a right frame;
5 is a pressing strip, 6 is a hanging lug, 7 is a front frame, 8 is a rear frame, 9 is a hoisting bolt, 10 is a heat-conducting silica gel pad, 11 is a battery module, 12 is a water gap, and 13 is an upper cover.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 to 8, the invention provides an integrated water cooling system for a power battery, comprising a lower bottom plate 3 which is horizontally distributed, wherein the top of the lower bottom plate 3 is provided with a groove 30 (shown in fig. 5);
the bent water pipe 1 and the heat insulation pad 2 are embedded in the groove 30;
the transverse cross-sectional shapes of the water pipe 1 and the heat insulation pad 2 are the same;
the upper surface of the water pipe 1 is flush with the upper surface of the lower bottom plate 3 (namely, is positioned at the same plane height);
a plurality of battery modules 11 are arranged right above the water pipe 1, and a heat-conducting silica gel pad 10 is arranged on the bottom surface of each battery module 11.
It should be noted that, with the present invention, the lower plate 3 is in contact with the bottom surface of the battery module 11 through the thermal conductive silicone pad 10 to perform heat exchange, and the water pipe 1 is embedded in the lower plate 3 and implements thermal management of the battery module 11.
In the present invention, the plurality of battery modules 11 are externally covered with an upper cover 13.
In the invention, in a concrete implementation manner, the top of the water pipe 1 is provided with a plurality of pressing strips 5 which are transversely distributed and arranged at intervals;
the edges of the left side and the right side of each depression bar 5 are respectively welded with the upper surface of the lower bottom plate 3;
the battery module 11 is fixedly connected with the pressing strip 5 through bolts.
It should be noted that the pressing bar 5 may be an aluminum profile, which has three functions, namely, functions of increasing the strength and rigidity of the integrated box, pressing the water pipe at the lower part, and fixing the battery module at the upper part.
In the invention, in the concrete implementation, a front frame 7 and a rear frame 8 are respectively welded at the front end and the rear end of the lower bottom plate 3;
the left end and the right end of the lower bottom plate 3 are respectively welded with a left frame 41 and a right frame 42;
and a plurality of hoisting bolts 9 distributed at intervals are respectively arranged on the left frame 41 and the right frame 42.
Therefore, the whole power battery integrated water cooling system can be fixedly connected with the whole external electric vehicle through the hoisting bolts 9.
In the concrete implementation, the front frame 7 is connected with two hangers 6 through bolts.
In a specific implementation, the rear frame 8, the front frame 7, the right frame 42, and the left frame 41 may be made of aluminum profiles or cast aluminum materials.
It should be noted that the lower chassis 3, the rear frame 8, the front frame 7, the right frame 42, the left frame 41, etc. together form the lower box of the present invention.
In the present invention, the heat insulation pad 2 has a U-shaped cross section, and the heat insulation pad 2 is disposed to reduce heat exchange between the water pipe 1 and the lower plate 3 and to enhance heat exchange efficiency between the water pipe 1 and the battery module 11 on the top of the water pipe.
In the present invention, in a concrete implementation, the left end and the right end of the rear side of the water pipe 1 are respectively provided with a water gap 12 (i.e. one is used as a water inlet, and the other is used as a water outlet).
It should be noted that, as for the water pipe 1, the whole is a pipeline, and the water pipe arrangement principle is to ensure that each battery module contacts both a high-temperature water pipe and a low-temperature water pipe, so the water pipe is designed to be bent into a mode of being bent into an upper and a lower direction as shown in fig. 7, and meanwhile, the module mounting bolts are avoided, and the front-rear distance of the water pipe can be properly adjusted.
In concrete implementation, the two water ports 12 are respectively communicated with a liquid outlet and a liquid inlet of a water pump through hollow connecting pipelines, and cooling liquid is injected into the water pipe 1 and the connecting pipelines in advance.
The coolant is a flame-retardant coolant.
In the concrete implementation, the radiator and the heater are connected in series outside the connecting pipeline, so that heat dissipation treatment and heating treatment can be conveniently carried out on the cooling liquid in summer.
It should be noted that, in the present invention, the water pump is used for providing circulating power for the cooling liquid in the water pipe 1 and the connecting pipeline, so as to ensure that the cooling liquid can flow in the water pipe 1 and the connecting pipeline, and to control the flow speed of the cooling liquid.
In the concrete implementation, the water pump can be an existing common cooling pump, and for example, the water pump can be the same as a common cooling pump on a common automobile.
In a specific implementation, two ends of the cross section (such as a longitudinal cross section) of the water pipe 1 are in a U shape.
In a specific implementation, the water pipe 1 is a metal pipe which is easy to conduct heat, such as a copper pipe or an aluminum pipe, and is made by flattening a round pipe with an inner diameter of 14mm and an outer diameter of 18 mm.
It should be noted that, for the present invention, the shape of the water pipe 1 is as shown in fig. 8, in order to increase the cross-sectional area of the water channel and reduce the height of the water pipe, the cross-sectional area is the same as the cross-sectional area of the pipe joint of the system inlet and outlet circular pipe, so as to ensure that the water pipe has the same flow capacity as the circular pipe.
In particular, the water pipe 1 can be arranged into a overlook shape through a round aluminum pipe or a copper pipe, then is integrally extruded up and down to form the section of the figure 8, or the round pipe can be flattened into the section shape firstly, and then is bent into the figure 7, so that the process has high realizability (can be formed in other modes).
In the invention, it should be noted that the lower bottom plate 3 can be formed by milling a groove after friction stir welding of an aluminum profile plate, or by directly molding the groove by using cast aluminum, and the processes of profile welding milling and cast aluminum mold molding are both mature.
It should be noted that, for the power battery integrated water cooling system provided by the invention, the integrated water cooling system has a compact space, a lighter weight, safety and reliability, and particularly, the compact design of the water cooling height space adopts an integrated structure that a box body is embedded into a water pipe, the water pipe adopts a form that an aluminum pipe or a copper pipe is pressed into a box body groove or is inserted into a box body cavity, a flexible heat-conducting silica gel pad is pasted above the water pipe and is attached to the bottom surface of a battery module, so that the water cooling integration is realized, the height of the water pipe serving as the water cooling structure is obviously reduced, the space is saved, the volume energy density of the battery system of the electric vehicle is greatly improved, and the space utilization rate of the system is optimized.
For the invention, when the water pipe 1 and the heat insulation pad 2 are embedded into the lower bottom plate 3 during installation, the heat insulation pad 2 is a flat and long strip made of heat insulation rubber or asbestos, the flat and long strip is gradually extruded into the groove of the lower bottom plate 3, the heat insulation pad 2 naturally forms a U-shaped cross section, and then the heat insulation pad is embedded into the water pipe 1. The water pipe 1 can be gradually pressed into the water channel along the groove of the lower bottom plate 3 by using a round pipe, the pressed-in water pipe 1 highly exceeds the upper surface of the lower bottom plate 3, the water pipe 1 and the lower bottom plate 3 are integrally pressed up and down by the rethread, the water pipe 1 is pressed and deformed by the cavity, and the water pipe 1 is flattened to be flush with the upper surface of the lower bottom plate 3.
As proved by inspection, the water cooling system is efficiently integrated with the lower box body, so that compared with the traditional water cooling plate structure, the water cooling system provided by the invention realizes the internal installation height space required by the battery module, and at least saves 5-7 mm, and the left and right spaces in the battery module are saved by at least 36-40 mm due to the reduction of the number of external water cooling pipes and joints.
According to the invention, the water pipes at the bottom are arranged in a serpentine shape in an inserting manner, the high-temperature water pipe and the low-temperature water pipe are arranged below the battery module and the heat-conducting silica gel pad, the soaking effect and the space arrangement rationality are better, and compared with the traditional water cooling plate, the soaking effect and the space arrangement rationality are more advantageous, and the temperature difference control of the battery module of the whole system is more easily ensured within 1 ℃. Because the types and the number of the integrated water-cooling parts are greatly reduced, the whole weight of the water-cooling system and the lower box body is reduced by at least 5%, the energy density of the whole system is improved by at least 2%, the safety of the system is improved by at least 10% because the system has no liquid leakage risk, and the traditional heat management mode that the power battery adopts independent water-cooling plates and water-cooling tubes in the prior art is thoroughly changed.
It should be noted that, in the present invention, if the water pipe 1 is in direct contact with the battery module 11, there will be a minute air pocket. For this reason, heat conduction silica gel pad 10 is added between water pipe 1 and battery module 11, the quantity and area of heat conduction silica gel pad can be adjusted according to the module quantity at will, a heat conduction silica gel pad 10 is placed below each battery module 11 shown in the figure, heat conduction silica gel pad 10 has certain viscidity, can paste earlier on the module bottom surface and then install on lower plate 3 together with module 11, also can paste silica gel pad 10 on lower plate 3 earlier and then install module 11, fill between front and back layering 5 after heat conduction silica gel pad 10 has been installed, battery module 11 passes through the bolt fastening on layering 5.
After water pipe 1 imbeds lower plate 3, the requirement of 1 upper surface of water pipe and lower plate 3's upper surface flushes, the water course degree of depth of lower plate 3 or water pipe 1 flatten back height 5mm (3 overall height 12mm of lower plate), thickness before the installation of heat conduction silica gel pad 10 is 4mm, bottom surface after the installation of battery module 11 is 3mm with the upper surface difference in height of lower plate 3, battery module 11 has compressed 1mm with the silica gel pad after installing on layering 5, realize module 11, heat conduction silica gel pad 10 and water pipe 1 in close contact with, the heat dissipation direction of battery is from battery module 11 to heat conduction silica gel pad 10 to water pipe 1 again.
For the whole battery integrated water cooling system, an upper cover 13 is combined to form a closed system, the heat insulation pad 2 can reduce the heat transfer between the water pipe 1 and the lower base plate 3, a main heat transfer channel between the water pipe 1 and the battery module 11 is ensured, and the heat transfer is controllable.
The water pipe 1 is filled with cooling liquid mixed by ethylene glycol and water, the pressure of the water pump is provided by the whole vehicle, the cooling liquid passes through the water gap 12, the flow rate is 12L/min, and the internal and external circulating flow of the whole water cooling system can be realized. In summer, the battery needs the heat dissipation, and the heat passes through battery module 11 transmission feed pipe 1, and inside coolant liquid circulation is gone out heat transfer to outside radiator, realizes cooling fast. In winter, the battery needs to be heated, the PTC (positive temperature coefficient) heater integrated in the external pipeline of the whole water cooling system quickly heats the cooling liquid, the cooling liquid circulates to the inside of the water pipe 1, the heat insulation pad 2 ensures that the heat of the water pipe 1 is mainly transferred to the battery module 11, and efficient heating is realized.
For the invention, the left end part can be provided with double-layer battery modules, namely nine upper-layer modules, for the upper-layer modules, the traditional independent water cooling plate can be adopted for independent water cooling (parallel connection with the water cooling of the patent), and the traditional water cooling can also be connected with the integrated water cooling of the patent in series, so that the effect of reducing the water-cooled connector is realized, the leakage risk of the connector is reduced, the water-cooled system is safer and more reliable, and the traditional cooling method is not described again here.
Therefore, in summary, compared with the prior art, the invention provides an integrated water cooling system for a power battery, which can ensure the heat dissipation effect of a water cooling structure on a battery module on the basis of ensuring that the installation space and the installation height of the battery module in an electric vehicle are not changed, thereby ensuring the use safety of the battery module, reducing the safety risk of the battery module, being capable of forming industrial scale, being beneficial to wide application and having great production practice significance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The power battery integrated water cooling system is characterized by comprising a lower bottom plate (3) which is horizontally distributed, wherein the top of the lower bottom plate (3) is provided with a groove (30);
the water pipes (1) and the heat insulation pads (2) which are distributed in a bent mode are embedded into the grooves (30);
the transverse cross-sectional shapes of the water pipe (1) and the heat insulation pad (2) are the same;
the upper surface of the water pipe (1) is flush with the upper surface of the lower bottom plate (3);
a plurality of battery modules (11) are arranged right above the water pipe (1), and a heat conduction silica gel pad (10) is arranged on the bottom surface of each battery module (11).
2. The integrated water cooling system for the power battery as claimed in claim 1, wherein an upper cover (13) covers the outside of the plurality of battery modules (11) and the whole integrated water cooling system for the power battery.
3. The integrated water cooling system for the power battery according to claim 1, wherein the top of the water pipe (1) is provided with a plurality of longitudinal-distributed and spaced-apart battens (5);
the flanges at the left side and the right side of each pressing strip (5) are respectively welded with the upper surface of the lower bottom plate (3);
the battery module (11) is fixedly connected with the pressing strip (5) through bolts.
4. The power battery integrated water cooling system according to claim 1, wherein a front frame (7) and a rear frame (8) are welded to the front end and the rear end of the lower base plate (3) respectively;
the left end and the right end of the lower bottom plate (3) are respectively welded with a left frame (41) and a right frame (42);
and a plurality of hoisting bolts (9) distributed at intervals are respectively arranged on the left frame (41) and the right frame (42).
5. The integrated water cooling system for the power battery according to claim 4, wherein two hanging lugs (6) are connected to the front frame (7) through bolts.
6. The power battery integrated water cooling system according to claim 1, wherein the water pipe (1) is provided with a water gap (12) at each of the left and right ends of the rear side;
the two water ports (12) are respectively communicated with a liquid outlet and a liquid inlet of a water pump through hollow connecting pipelines, and cooling liquid is injected into the water pipe (1) and the connecting pipelines in advance.
7. The integrated water cooling system for power batteries according to claim 6, wherein the connecting pipeline is externally connected with a radiator and a heater in series.
8. The integrated water cooling system for the power battery as claimed in claim 6, wherein the two ends of the cross-sectional shape of the water pipe (1) are U-shaped.
CN201811202943.7A 2018-10-16 2018-10-16 Integrated water cooling system of power battery Active CN109616715B (en)

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CN111430841B (en) * 2020-04-04 2021-09-03 东风汽车集团有限公司 Power battery cooling and heating system
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