CN210200920U - Power battery thermal management system based on composite phase change material cooling - Google Patents
Power battery thermal management system based on composite phase change material cooling Download PDFInfo
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- CN210200920U CN210200920U CN201920664063.5U CN201920664063U CN210200920U CN 210200920 U CN210200920 U CN 210200920U CN 201920664063 U CN201920664063 U CN 201920664063U CN 210200920 U CN210200920 U CN 210200920U
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Abstract
The utility model discloses a power battery thermal management system based on composite phase change material cooling and application thereof, wherein the system comprises a battery module and a foamy copper/paraffin composite phase change module; the battery module is embedded with a plurality of hot plates for extracting heat; and the plurality of heat pipes are connected with the corresponding hot plate and the foamy copper/paraffin composite phase change module and are used for transferring heat generated by the battery module. The power battery thermal management system is simple in structure and reasonable in design, and the composite phase change module is made of paraffin and foamy copper, so that the heat conduction efficiency of the system can be improved. The contact area between the heat pipe and the surface of the battery is increased by the hot plate, so that the temperature distribution on the surface of the battery is more uniform, the problem of thermal runaway caused by too large temperature difference on the surface of the battery is avoided, and the quantity of the heat pipes can be reduced. The heat pipe is utilized to separate the power supply and the phase change material module, the phase change material is not required to be filled into the battery, and the problem that the molten phase change material is easy to leak in the prior art is solved.
Description
Technical Field
The utility model relates to an automobile battery technical field especially relates to a power battery thermal management system based on composite phase change material cooling.
Background
In a battery thermal management system, a passive cooling system using a phase change material as a cooling medium has advantages such as no need for a cooling fan, a condenser, and a cooling route design, and a phase change material having high latent heat absorbs/releases a large amount of latent heat during a melting/solidifying process to adjust the temperature of a battery so that the temperature of a battery pack is maintained within a certain range. The existing battery thermal management system adopts phase-change materials to fill gaps among batteries or around the batteries, so as to achieve the effect of regulating the temperature of the batteries. However, this approach may cause the following problems: firstly, some high-thermal-conductivity materials for improving the thermal conductivity of the phase-change material, such as metal nanoparticles and foamed metal, are good conductors, and if the battery module is extruded or the phase-change material expands at high temperature, the high-thermal-conductivity materials are likely to contact with the battery electrode, so that the battery endurance is reduced or the service life of the battery is influenced; secondly, when the battery works for a long time or under the working condition of high discharge rate, the melting rate of the phase-change material is continuously improved, when the phase-change material is completely dissolved, the heat management system stops working, and an additional cooling method is needed to further improve the performance of the system. Therefore, the battery thermal management system cannot be widely popularized and applied at present, and great improvement and promotion space exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power battery thermal management system based on compound phase change material is refrigerated, the mountable of this system has advantages such as simple structure, radiating efficiency height in order to promote automobile power battery's performance inside the car.
In order to solve the technical problem, the utility model provides a following technical scheme: a thermal management system for a power battery based on composite phase change material cooling comprises a battery module and a foamy copper/paraffin composite phase change module positioned on one side of the battery module; the battery module is embedded with a plurality of hot plates for extracting heat; and the plurality of heat pipes are connected with the corresponding hot plates and the foamy copper/paraffin composite phase change module and are used for transferring the heat generated by the battery module to the foamy copper/paraffin composite phase change module. The battery module and the foamy copper/paraffin composite phase change module are separately arranged, so that the possibility of contact with a battery electrode is avoided, and the problem that the battery endurance is reduced or the service life of the battery is influenced due to the contact of a heat conduction material and the battery electrode is thoroughly solved.
Preferably, the battery module is provided with a plurality of rows of lithium ion battery cells, and the plurality of hot plates and the plurality of rows of lithium ion battery cells are alternately arranged.
Preferably, the copper foam/paraffin wax composite phase change module is provided with a plurality of composite phase change monomers which are stacked and arranged, each heat pipe is provided with an evaporation end and a condensation end, the evaporation end is connected with the corresponding hot plate, and the condensation end is connected with the corresponding two adjacent composite phase change monomers.
More preferably, the heat pipe is a flat heat pipe.
Preferably, the composite phase change module is made by filling paraffin with soft polyurethane foam copper.
Preferably, the evaporation end is arranged at one end, close to the foamy copper/paraffin composite phase change module, of the surface of the hot plate, and the contact surface between the condensation end and the composite phase change monomer extends from one end, close to the battery module, of the composite phase change monomer to one end, far away from the battery module, of the composite phase change monomer.
Preferably, the copper foam/paraffin wax composite phase change module is provided with a plurality of radiating fins.
Preferably, the air conditioner further comprises at least one cooling fan, and the air outlet direction of the cooling fan faces to the copper foam/paraffin composite phase change module.
Preferably, the hot plate is a copper plate or an aluminum plate, but other materials having high thermal conductivity may be used.
The utility model also provides a use based on compound phase change material refrigerated power battery thermal management system is about to the power battery based on compound phase change material refrigerated power battery thermal management system is applied to the car.
Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the power battery thermal management system based on composite phase change material cooling is simple in structure and reasonable in design, and the composite phase change module is made of paraffin and foamy copper, so that the heat conduction efficiency of the system can be improved. The arrangement of the hot plate not only increases the contact area between the heat pipe and the surface of the battery, so that the temperature distribution on the surface of the battery is more uniform, the problem of thermal runaway caused by too large temperature difference on the surface of the battery is avoided, but also the quantity of the heat pipes can be reduced, and the thermal resistance of the system is reduced so as to further reduce the generation of heat in the system. The heat pipe is utilized to separate the power supply and the phase change material module, the phase change material is not required to be filled into the battery, and the safety problem caused by the fact that the heat conduction material is easy to contact with the battery electrode or a lead due to the fact that leakage is easy to occur when the phase change material is melted is solved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and 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 and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a power battery thermal management system based on composite phase change material cooling according to the present invention;
in the figure: 1. a lithium battery module; 2. a foamy copper/paraffin composite phase change module; 3. a hot plate; 4. a heat pipe; 5. a heat dissipating fin; 6. a heat dissipation fan.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a thermal management system for a power battery based on composite phase change material cooling, which can be installed inside an automobile to perform effective thermal management on the power battery, so that the power battery can operate in a suitable temperature range. The system comprises a battery module 1, a foamy copper/paraffin composite phase change module 2 and a plurality of heat pipes 4 which are arranged between the battery module and the foamy copper/paraffin composite phase change module and are used for absorbing and transferring heat.
The battery module 1 is provided with a plurality of rows of lithium ion battery units, and each row of lithium ion battery units can be provided with one or more lithium ion batteries. The plurality of hot plates 3 and the lithium ion battery units are alternately arranged and tightly attached to the side faces of the lithium ion battery units and used for extracting heat generated by the battery units, so that the temperature distribution of the surface of the battery is more uniform, and the problem of thermal runaway caused by too large temperature difference of the surface of the battery is avoided. In addition, the heat generated by the lithium ion battery units is collected by the hot plate, so that the number and the length of the heat pipes are reduced, the corresponding heat pipe does not need to be arranged for each battery unit, and the cost is saved. The hot plate is preferably a copper plate, and in other embodiments, an aluminum plate or other material with high thermal conductivity may be used.
The foamy copper/paraffin composite phase change module 2 is provided with a plurality of composite phase change monomers which are stacked, and a space for a heat supply pipe to pass through is arranged between the adjacent composite phase change monomers. The composite phase change monomer is manufactured by blowing and melting paraffin by a high-temperature gun, soaking a foam copper square block, placing the foam copper square block in a thermostat, waiting until the foam copper square block is solidified, and then polishing the surface of the foam copper to be flat so that the paraffin is completely soaked in the foam copper. The heat conduction area can be increased by utilizing the structure of the foam metal copper, and the heat conduction coefficient of the copper is large, so that heat can be led into the composite phase-change module more quickly. The composite phase change monomer is prepared by filling paraffin in the polyurethane soft foam copper, so that the disadvantage of low heat conductivity coefficient of the paraffin phase change material is made up, and the heat conductivity of the composite phase change monomer is improved. In addition, the foamy copper/paraffin composite phase change module is provided with a radiating fin 5 for forcibly radiating latent heat of the phase change material, so that the phase change speed of the phase change material is favorably slowed down, and the radiating performance of the system is further improved. In this embodiment, one side of each composite phase change monomer away from the battery module is provided with a corresponding heat dissipation fin.
The heat pipe 4 is flat and is in close contact with the hot plate and the composite phase change monomer by utilizing the wide surface of the heat pipe, so that the structure is more compact, and the space is saved. The heat pipe is provided with an evaporation end and a condensation end, and the evaporation end is connected with the corresponding hot plate. The condensation end is connected with two adjacent composite phase change monomers.
And the evaporation end is arranged at one end of the surface of the hot plate, which is close to the foamy copper/paraffin composite phase change module, so that the length of the heat pipe is saved, and the thermal resistance generated in the heat transfer process is reduced. The contact surface of the condensation end and the composite phase change monomer extends from one end, close to the battery module, of the composite phase change monomer to one end, far away from the battery module, of the composite phase change monomer, so that the contact area is increased, and heat can be absorbed by different parts of the composite phase change monomer. In this embodiment, heat pipes parallel to each other are disposed between each pair of adjacent composite phase change monomers, so as to facilitate uniform heat dissipation, and of course, in other embodiments, the number and arrangement of the heat pipes may be adjusted according to actual conditions.
Further, the evaporation end is bonded on the surface of the hot plate through high-temperature glue, the condensation end is bonded on the side face of the composite phase change monomer through the high-temperature glue, and in other embodiments, graphene solution can be selected to be coated and bonded or in other modes.
Further, the power battery thermal management system based on composite phase change material cooling further comprises at least one cooling fan 6, and the air outlet direction of the cooling fan 6 is arranged towards the foam copper/paraffin composite phase change module. When the battery discharges for a long time or discharges with high multiplying power, the heat dissipation fan is started, the heat dissipation of the phase-change material can be enhanced, the phase-change speed is slowed down, and the working time of the phase-change material is prolonged.
The working principle of the power battery thermal management system based on composite phase change material cooling in the embodiment is as follows:
the battery module 1 generates heat in the charging and discharging process, the battery module and the foamy copper/paraffin composite phase change module are connected by the heat pipe 4, the evaporation end of the heat pipe is attached to the hot plate, and the condensation end is arranged in the phase change module. When the temperature of the battery unit reaches the starting temperature of the heat pipe, the heat pipe starts to work, heat generated by the work of the battery is quickly transferred out of the battery module through the heat pipe and absorbed and stored by the phase change module, so that the temperature of the battery is maintained in the optimal working temperature range, the power performance of the battery is improved, and the service life of the battery is prolonged. The paraffin is pressurized and filled into the polyurethane soft foam copper in a molten liquid state to form a composite phase change module, so that the disadvantage of low heat conductivity coefficient of the paraffin phase change material is overcome. The contact area between the heat pipe and the surface of the battery is increased by arranging the hot plate, so that the temperature distribution on the surface of the battery is more uniform, and the problem of thermal runaway caused by too large temperature difference on the surface of the battery is avoided. When the foamy copper/paraffin composite phase change module exceeds a certain temperature, the radiating fins 5 are started and forcibly radiate the latent heat of the phase change material, so that the phase change speed of the phase change material is slowed down. When the battery is discharged for a long time or discharged at a high rate or the operation condition is severe, and the phase change module rapidly accumulates heat and has insufficient capacity of dissipating the heat outwards, the heat dissipation fan activates and strengthens the heat dissipation of the phase change material, and the phase change speed is slowed down, so that the working time of the phase change material is prolonged.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The power battery thermal management system based on composite phase change material cooling comprises a battery module and is characterized by further comprising a foamy copper/paraffin composite phase change module which is positioned on one side of the battery module and is separated from the battery module; the battery module is provided with a plurality of hot plates for extracting heat; and the plurality of heat pipes are connected with the corresponding hot plates and the foamy copper/paraffin composite phase change module and are used for transferring the heat generated by the battery module to the foamy copper/paraffin composite phase change module.
2. The power battery thermal management system based on composite phase change material cooling of claim 1, characterized in that: the battery module comprises a plurality of rows of lithium ion battery units, and a plurality of hot plates and the plurality of rows of lithium ion battery units are alternately arranged.
3. The power battery thermal management system based on composite phase change material cooling of claim 2, characterized in that: the foamy copper/paraffin composite phase change module is provided with a plurality of composite phase change monomers which are stacked and arranged, each heat pipe is provided with an evaporation end and a condensation end, the evaporation end is connected with the corresponding hot plate, and the condensation end is connected with the two adjacent composite phase change monomers.
4. The power battery thermal management system based on composite phase change material cooling of claim 3, characterized in that: the evaporation end of the heat pipe is arranged at one end, close to the foamy copper/paraffin composite phase change module, of the surface of the hot plate, and the condensation end of the heat pipe and the contact surface of the composite phase change monomer extend from one end, close to the battery module, of the composite phase change monomer to one end, far away from the battery module, of the composite phase change monomer.
5. The power battery thermal management system based on composite phase change material cooling of claim 1, characterized in that: the heat pipe is a flat heat pipe.
6. The power battery thermal management system based on composite phase change material cooling of claim 1, characterized in that: the foam copper/paraffin composite phase change module is manufactured in a mode that paraffin is filled in flexible polyurethane foam copper.
7. The power battery thermal management system based on composite phase change material cooling of claim 1, characterized in that: the foamy copper/paraffin composite phase change module is provided with a plurality of radiating fins.
8. The power battery thermal management system based on composite phase change material cooling of claim 1, characterized in that: the cooling device comprises at least one cooling fan, wherein the air outlet direction of the cooling fan faces to the foam copper/paraffin composite phase change module.
9. The power battery thermal management system based on composite phase change material cooling of claim 1, characterized in that: the hot plate is a copper plate or an aluminum plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920664063.5U CN210200920U (en) | 2019-05-10 | 2019-05-10 | Power battery thermal management system based on composite phase change material cooling |
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| CN201920664063.5U CN210200920U (en) | 2019-05-10 | 2019-05-10 | Power battery thermal management system based on composite phase change material cooling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071348A (en) * | 2019-05-10 | 2019-07-30 | 佛山科学技术学院 | Based on the cooling power battery thermal management system of composite phase-change material and its application |
| CN112563616A (en) * | 2020-12-11 | 2021-03-26 | 南方电网电力科技股份有限公司 | Heat radiation module |
-
2019
- 2019-05-10 CN CN201920664063.5U patent/CN210200920U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071348A (en) * | 2019-05-10 | 2019-07-30 | 佛山科学技术学院 | Based on the cooling power battery thermal management system of composite phase-change material and its application |
| CN112563616A (en) * | 2020-12-11 | 2021-03-26 | 南方电网电力科技股份有限公司 | Heat radiation module |
| CN112563616B (en) * | 2020-12-11 | 2023-03-21 | 南方电网电力科技股份有限公司 | Heat radiation module |
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