CN113036262A - Balanced heat abstractor of battery module - Google Patents
Balanced heat abstractor of battery module Download PDFInfo
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- CN113036262A CN113036262A CN202110256365.0A CN202110256365A CN113036262A CN 113036262 A CN113036262 A CN 113036262A CN 202110256365 A CN202110256365 A CN 202110256365A CN 113036262 A CN113036262 A CN 113036262A
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- flow channel
- temperature
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- battery
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- 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
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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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
Abstract
The invention discloses a battery module balanced heat dissipation device. The battery module balanced heat dissipation device comprises a temperature equalizing plate in heat conduction fit with a single battery, a flow channel structure for a temperature equalizing medium to flow is arranged in the temperature equalizing plate, and the flow channel structure is provided with a fluid inlet and a fluid outlet; the flow channel structure comprises at least a first flow channel and a plurality of second flow channels, the first flow channel is directly communicated with the fluid inlet, the plurality of second flow channels are communicated with the fluid outlet, and the first flow channel is also communicated with the plurality of second flow channels; the first flow channel is correspondingly arranged in an area close to a single battery tab, and the first flow channel is obliquely arranged in a downward direction along the flowing direction of the uniform temperature medium. The battery module equalizing heat dissipation device provided by the invention can reduce the highest temperature of the single batteries to prolong the service life of the batteries, and can ensure the temperature consistency among a plurality of single batteries, thereby reducing the control difficulty of a battery safety management system.
Description
Technical Field
The invention relates to a battery heat dissipation device, in particular to a battery module balanced heat dissipation device, and belongs to the technical field of lithium ion batteries.
Background
As the global economy continues to grow, the demand for energy from humans is increasing. At present, fossil energy such as petroleum, natural gas, coal and the like meets 80% of energy requirements of the world. However, the exploitation and utilization of fossil energy on a large scale have caused serious environmental pollution and global warming. The lithium ion battery is the first choice for cleaning power due to the advantages of high energy density, long service life and the like. However, the lithium ion battery is sensitive to the working temperature, the optimum working temperature range of the lithium ion battery is 25-40 ℃, and the temperature difference of the battery module is controlled within 5 ℃. Too high or too low an operating temperature not only increases the decay rate of the lithium ion battery, but may also create a series of safety issues (thermal runaway, combustion, explosion). Therefore, it is very important to perform corresponding thermal management for the heat generation characteristics of the lithium ion battery in the discharging process.
With the gradual standardization and specialization of the production of the lithium ion battery, the safety management system of the lithium ion battery also adopts a fresh battery with better consistency as a research object, and can achieve better factory safety standard. However, in the 2018/2019 accident statistics published by the Ministry of industry and communications, the electric automobile generally has a problem in the second summer after leaving the factory. This is because the capacity of the unit cells is accelerated by local overheating due to the space arrangement in the battery pack and heat generation during the charge and discharge of the battery, and the uniformity difference between the units becomes large, so that safety is not secured after the deterioration with the aging of the battery. Therefore, the battery needs to be kept at the optimal working temperature to slow down the attenuation speed of the battery, and the temperature uniformity of the single batteries in the battery pack is also guaranteed, so that the capacity consistency of the single batteries is guaranteed, and the phenomenon of thermal runaway of the battery caused by overcharge and overdischarge of a certain battery due to the too fast attenuation of the single battery is prevented, and the wooden barrel effect is prevented.
Disclosure of Invention
The invention mainly aims to provide a battery module balanced heat dissipation device to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a battery module balanced heat dissipation device which comprises a temperature-equalizing plate in heat conduction fit with a single battery, wherein a flow channel structure for allowing a temperature-equalizing medium to flow is arranged in the temperature-equalizing plate, and the flow channel structure is provided with a fluid inlet for allowing the temperature-equalizing medium to flow in and a fluid outlet for allowing the temperature-equalizing medium to flow out;
the flow channel structure comprises at least a first flow channel and a plurality of second flow channels, the first flow channel is directly communicated with the fluid inlet, the plurality of second flow channels are communicated with the fluid outlet, and the first flow channel is also communicated with the plurality of second flow channels;
the first flow channel is correspondingly arranged in an area close to a single battery tab, and the first flow channel is obliquely arranged in a downward direction along the flowing direction of the uniform temperature medium.
Compared with the prior art, the invention has the advantages that:
1) according to the balanced heat dissipation device for the battery module, provided by the embodiment of the invention, the heating characteristics of the lithium ion battery are combined, the fluid inlet of the temperature-equalizing medium is arranged in the region corresponding to the anode/cathode lug with serious heat generation, and the flow channel directly connected with the fluid inlet is obliquely arranged, so that the heat generation difference caused by different materials of the anode/cathode lug is solved, and the temperature-equalizing medium can uniformly flow into the flow channel structure under the action of gravity;
2) according to the battery module balanced heat dissipation device provided by the embodiment of the invention, the plurality of parallel flow channel structures are vertically arranged in the temperature equalizing plate, the uniformity of the surface temperature of the single battery is ensured in a top-down flowing mode, the occurrence of local overheating is avoided, and meanwhile, the temperature equalizing plate can isolate the single battery out of control of heat, so that good heat insulation and heat dissipation effects can be achieved, the service life of the battery is prolonged, and the safety of the battery is improved;
3) the battery module balanced heat dissipation device provided by the embodiment of the invention realizes the modularization processing of a battery system and a heat dissipation system, can reduce the difficulty of later maintenance, and can also avoid overlarge pressure difference in an inlet pipeline and an outlet pipeline, so that the flow in each temperature equalization plate is more uniform, and each temperature equalization plate is ensured to have the same heat dissipation capability;
4) the battery module equalizing heat dissipation device provided by the embodiment of the invention also avoids the problem that the capacity difference is obvious and further exceeds the control requirement of a battery safety management system due to the fact that the aging speed of individual single batteries in the battery module is increased, and finally the use safety of power batteries can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a battery module balancing and heat dissipating device according to an exemplary embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an internal structure of a battery module equalizing heat dissipation device according to an exemplary embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a vapor chamber according to an exemplary embodiment of the invention.
Detailed Description
In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
Aiming at the heating characteristic of the lithium ion battery in the charging and discharging process, an effective heat management structure is provided. The invention mainly aims at the problem of high heat productivity of the anode/cathode lugs of the lithium ion battery, and provides a battery module equalizing heat dissipation device with a liquid cooling heat dissipation system from the aspects of temperature control of single batteries, heat uniformity among the single batteries and replaceability of a battery module.
The battery module balanced heat dissipation device provided by the invention can reduce the highest temperature of the single batteries to prolong the service life of the batteries, and can ensure the temperature consistency among a plurality of single batteries, thereby reducing the control difficulty of a battery safety management system. The actual heating characteristics of the battery are combined, so that the heating value of the positive/negative electrode tab of the battery is higher, the material of the positive/negative electrode tab is different, and the heating value of the positive/negative electrode tab is also obviously different.
According to the battery module balanced heat dissipation device provided by the embodiment of the invention, modular heat management is carried out on a lithium ion battery pack according to the structural characteristics and physical characteristics of a square battery and the accident analysis of the conventional EV/HEV; the cooling medium flows into the battery tab with higher heat productivity, flows into the temperature equalizing plate along the direction forming an angle of 0-30 degrees with the horizontal direction in a downward inclination manner, flows through a plurality of straight channels (namely second channels) which are vertically arranged and arranged in parallel, then is converged in a horizontal channel (namely third channel) at the bottom of the temperature equalizing plate, and finally flows out from an outlet pipeline; the heat at the anode/cathode lug with larger heat generation quantity is taken away from the top to the bottom along with the flowing of the cooling medium, so that the heat uniformity of the surfaces of the single batteries is ensured, and the temperature equalizing plates adopt the same structure, so that the consistency of temperature fields among the single batteries is ensured; the battery heat management system is subjected to modular processing, so that the difference of the heat dissipation capacity of the temperature equalizing plates can be reduced, and meanwhile, the gaps in the box body are filled with heat insulating materials, so that the heat exchange with the environment can be reduced, the temperature difference between the batteries in the outer edge area and the central area in the box body is avoided, the heat uniformity of the surfaces of the single batteries can be controlled, and the consistency of the temperature field in the battery module can be ensured.
The invention provides a battery module balanced heat dissipation device, which comprises an inlet pipeline and an outlet pipeline required by a thermal management system in a battery module, a temperature equalizing plate corresponding to the heat dissipation of single batteries, a series/parallel battery pack, an aluminum alloy frame (or a box body) for supporting and assembling a modular battery pack and the temperature equalizing plate, a fixing clamping seat for fixing the battery module, and a heat insulation material filled for reducing the influence of the external environment on the temperature field in the battery module, wherein the temperature equalizing medium (such as a cooling medium, the same below) in the inlet pipeline and the outlet pipeline takes the heat generated by the single batteries out of the battery module under the action of an electronic water pump, the temperature equalizing medium preferentially cools a tab area with the highest heat generation, and the heat difference between positive and negative tabs and the flow difference in parallel channels are met through the arrangement of inclined flow channels, the temperature consistency of the whole single battery surface is realized through the vertically and uniformly arranged flow channel structure, and the local overheating phenomenon caused by the space arrangement of the battery pack and the heat generation of the single battery is avoided through the battery modularization treatment, namely the division and differentiation idea of the battery pack/pack.
The embodiment of the invention provides a battery module balanced heat dissipation device which comprises a temperature-equalizing plate in heat conduction fit with a single battery, wherein a flow channel structure for allowing a temperature-equalizing medium to flow is arranged in the temperature-equalizing plate, and the flow channel structure is provided with a fluid inlet for allowing the temperature-equalizing medium to flow in and a fluid outlet for allowing the temperature-equalizing medium to flow out;
the flow channel structure comprises at least a first flow channel and a plurality of second flow channels, the first flow channel is directly communicated with the fluid inlet, the plurality of second flow channels are communicated with the fluid outlet, and the first flow channel is also communicated with the plurality of second flow channels;
the first flow channel is correspondingly arranged in an area close to a single battery tab, and the first flow channel is obliquely arranged in a downward direction along the flowing direction of the uniform temperature medium.
Further, the angle between the first flow channel and the horizontal direction is 0-30 degrees, and preferably 10 degrees.
Furthermore, the plurality of second flow passages are sequentially arranged at intervals along the length direction of the first flow passage and are respectively communicated with the first flow passage;
further, the plurality of second flow channels are arranged in parallel.
Further, the flow channel structure further includes a third flow channel, the plurality of second flow channels are respectively communicated with the third flow channel, and the third flow channel is directly communicated with the fluid outlet.
Further, the third flow channel is horizontally arranged, and the plurality of second flow channels are vertically arranged between the first flow channel and the third flow channel;
further, the fluid inlet and the fluid outlet are respectively and oppositely arranged at two opposite corners of the temperature equalizing plate.
Furthermore, the battery module equalizing heat dissipation device comprises a plurality of temperature equalizing plates, the temperature equalizing plates and the single batteries are alternately arranged at intervals in sequence, and the single batteries are combined in a series connection and/or parallel connection mode to form a battery pack.
Furthermore, a heat conducting gasket is arranged between the adjacent single batteries and the temperature-equalizing plate.
Furthermore, a heat conduction silicone grease layer is arranged on the contact surface of the single battery and the temperature-equalizing plate.
Furthermore, the temperature equalizing plate and the single battery are arranged in a box body, and a gap between the single battery and the box body is filled with a heat insulating material.
Further, the fluid inlet is also connected with an inlet pipeline, the fluid outlet is also connected with an outlet pipeline, the inlet pipeline and the outlet pipeline are also connected with a heat exchange mechanism, and the flowing directions of temperature-equalizing media in the inlet pipeline and the outlet pipeline are opposite;
further, the inlet pipeline and the outlet pipeline are also connected with a pump.
Furthermore, the inlet pipeline is arranged at the upper area of the box body, the outlet pipeline is arranged at the lower area of the box body, the inlet pipeline and the outlet pipeline are correspondingly arranged at two opposite sides of the box body respectively, and at least the parts of the inlet pipeline and the outlet pipeline are arranged outside the box body.
Furthermore, the bottom of the box body is also provided with a fixing clamping seat at least used for fixing the battery module balanced heat dissipation device.
As will be described in further detail with reference to the accompanying drawings, unless otherwise specified, each component and mechanism in the battery module heat dissipation device according to the embodiments of the present invention may be known to those skilled in the art, and the shape and size of the single battery and the temperature equalization plate may be adjusted according to specific situations, which is not limited herein.
Referring to fig. 1-3, a battery module equalizing heat dissipation device includes a plurality of single batteries 7 and a plurality of temperature-uniforming plates 8 disposed in a case 3, wherein the plurality of single batteries 7 and the plurality of temperature-uniforming plates 8 are alternately disposed at intervals in sequence to form a sandwich structure, and each temperature-uniforming plate 8 is in thermal contact with at least a surface of one single battery 7; a flow channel structure for uniform temperature medium to flow is arranged in the uniform temperature plate 8, a fluid inlet and a fluid outlet of the flow channel structure are respectively and correspondingly communicated with an inlet pipeline 1 arranged at the upper area of the box body 3 and an outlet pipeline 2 arranged at the lower area of the box body 3, the inlet pipeline 1 and the outlet pipeline 2 are respectively connected with a heat exchange mechanism (such as a heat exchange water tank), and the inlet pipeline 1 and the outlet pipeline 2 are respectively matched with an electronic pump, driven by the electronic pump, the temperature-equalizing medium in the heat exchange mechanism can flow into the flow channel structures in the temperature-equalizing plates 8 from the inlet pipeline 1, then flow out from the outlet pipeline 2 and are conveyed back to the heat exchange mechanism, in the flowing process of the heat exchange medium, the single battery, the temperature equalizing plate 8 and the temperature equalizing medium realize heat exchange, so that the temperature of different areas on the surface of the single battery is uniform.
Specifically, referring to fig. 1 and fig. 2 again, the plurality of single batteries 7 and the plurality of temperature-uniforming plates 8 are sequentially arranged in a staggered manner, and the fluid inlets 80 and the fluid outlets 84 on the temperature-uniforming plates 8 are respectively connected and communicated with the inlet pipeline 1 and the outlet pipeline 2, wherein the fluid inlets 80 and the fluid outlets 84 can be connected with the inlet pipeline 1 and the outlet pipeline 2 in a welding or nesting manner, so that resistance to the flow of a temperature-uniforming medium caused by the connection of the inlets and the outlets is reduced as much as possible, otherwise, the temperature uniformity among the plurality of single batteries 7 in the battery module is affected; specifically, a heat-conducting silicone layer may be disposed on a contact surface between the single battery 7 and the temperature-uniforming plate 8, and/or a heat-conducting gasket may be disposed between the single battery 7 and the temperature-uniforming plate 8, so as to reduce thermal contact resistance between the single battery 7 and the temperature-uniforming plate 8, and enhance a heat exchange effect.
Specifically, please refer to fig. 1 again, only an inlet pipeline 1, an outlet pipeline 2 and an electrical interface for connecting with a plurality of single batteries 7 connected in series/parallel, which are required for liquid cooling heat dissipation, are left outside the whole battery module equalizing heat dissipation device, wherein the inlet pipeline 1 is arranged at an upper part or a top area of a box 3 close to a battery top positive/negative electrode tab 4, the outlet pipeline 2 is arranged at a lower part or a bottom area of the box 3, for example, the inlet pipeline 1 and the outlet pipeline 2 are respectively arranged at two opposite sides of the box 3, and the flow directions of the temperature equalizing media in the inlet pipeline 1 and the outlet pipeline 2 are opposite (the arrows in the figure point to the flow direction of the temperature equalizing media); under the action of the electronic pump, the temperature-equalizing medium exchanges heat through the water tank (namely, the heat exchange mechanism) and then flows into the inlet pipeline 1, flows into the runner structures in the temperature-equalizing plates through the inlet pipeline 1, and finally flows out through the outlet pipeline 2 and is conveyed back to the water tank; in addition, the gaps between the box body 3 and the plurality of single batteries 7 are filled with heat insulation materials 6 to reduce the influence of the external environment temperature.
Specifically, an inlet pipeline 1 among the battery module balanced heat dissipation devices is also connected with an outlet pipeline 2, so that in order to avoid the influence of factors such as mechanical collision and the like, a heat insulation hose can be adopted for connection, and a bayonet is screwed up and sealed; and can also set up fixed cassette 5 in the bottom four corners department of the box of the balanced heat abstractor of battery module to fix the battery module on power device.
Specifically, according to theoretical analysis and experimental research of scholars at home and abroad at present, it is found that in the charging and discharging process of the lithium ion battery, the positive/negative electrode tab 4 of the lithium ion battery brings larger heat productivity due to internal resistance, and in addition, different materials used by the positive/negative electrode tab 4 can also make the heat production power of the positive/negative electrode tab have certain difference, so that the temperature equalizing medium firstly dissipates heat at the positive/negative electrode tab 4 with serious heat, namely, the fluid inlet of the flow channel structure in the temperature equalizing plate 8 is arranged at the upper region corresponding to the positive/negative electrode tab 4 of the single battery, and the part of the flow channel structure directly connected with the fluid inlet corresponds to the positive/negative electrode tab 4 of the single battery.
Specifically, referring to fig. 2 and 3, the flow channel structure includes a first flow channel 81, a third flow channel 83 and a plurality of second flow channels 82, the first flow passage 81 is in direct communication with the fluid inlet 80, the third flow passage 83 is in direct communication with the fluid outlet 84, the plurality of second flow channels 82 are sequentially arranged at intervals along the length direction of the first flow channel 81 or the third flow channel 83 between the first flow channel 81 and the third flow channel 83 and are respectively communicated with the first flow channel 81 and the third flow channel 83, wherein the fluid inlet 80 and the first flow channel 81 are disposed at an upper region of the temperature-uniforming plate 8, the first flow channel 81 is correspondingly arranged at the area close to the anode/cathode tab 4 of the single battery, the third flow channel 83 and the fluid outlet 84 are provided in a lower region of the vapor chamber plate 8, for example, the fluid inlet 80 and the fluid outlet 84 are oppositely disposed at two opposite corners of the vapor chamber plate 8.
Specifically, referring to fig. 3 again, the third flow channel 83 is horizontally disposed, the plurality of second flow channels 82 are disposed between the first flow channel 81 and the third flow channel 83 in parallel, and the plurality of second flow channels 82 are disposed perpendicular to the third flow channel 83; in order to avoid the flow rate difference among the plurality of second flow channels in the temperature equalization plate, the first flow channel 81 is arranged to be inclined downwards along the flowing direction of the temperature equalization medium, for example, the angle between the first flow channel 81 and the horizontal direction is 10 degrees.
Specifically, the flow rate is increased by utilizing the action of gravity, so that the temperature-equalizing medium flows along the flow channel structure far away from the fluid inlet 80, the temperature difference at the anode/cathode ear 4 of the lithium ion battery is reduced, the plurality of second flow channels 82 which are vertically downward and distributed in parallel are uniformly distributed and correspond to the surface of the battery, and the heat generated on the surface of the battery can be transferred to the temperature-equalizing medium in the temperature-equalizing plate through the temperature-equalizing plate and finally converged in the outlet pipeline 2 to flow out; meanwhile, the same flow channel arrangement is adopted by the temperature equalizing plates 8, so that the uniformity of a temperature field of a battery module consisting of a plurality of single batteries in the charging and discharging process can be ensured, the problem of capacity difference caused by the excessively fast attenuation of a certain single battery 7 can be prevented, and the difficulty of a safety control system is reduced.
Specifically, the battery module balance heat dissipation device provided by the embodiment of the invention can be used in cooperation with a thermal management system.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
The battery module balanced heat dissipation device provided by the embodiment of the invention combines the heating characteristics of the lithium ion battery, the fluid inlet of the temperature-equalizing medium is arranged in the region corresponding to the anode/cathode lug with serious heat generation, and the flow channel directly connected with the fluid inlet is obliquely arranged, so that the heat generation difference caused by different materials of the anode/cathode lug is solved, and the temperature-equalizing medium can uniformly flow into the flow channel structure under the action of gravity.
According to the battery module balanced heat dissipation device provided by the embodiment of the invention, the plurality of parallel flow channel structures are vertically arranged in the temperature equalizing plate, the uniformity of the surface temperature of the single battery is ensured in a top-down flowing mode, the occurrence of local overheating is avoided, and meanwhile, the temperature equalizing plate can isolate the single battery out of control of heat, so that good heat insulation and heat dissipation effects can be achieved, and the service life and safety of the battery are prolonged.
The battery module balanced heat dissipation device provided by the embodiment of the invention realizes the modularization processing of a battery system and a heat dissipation system, can reduce the difficulty of later maintenance, and can also avoid overlarge pressure difference in an inlet pipeline and an outlet pipeline, so that the flow in each temperature equalization plate is more uniform, and each temperature equalization plate is ensured to have the same heat dissipation capability; the battery module equalizing heat dissipation device provided by the embodiment of the invention also avoids the problem that the capacity difference is obvious and further exceeds the control requirement of a battery safety management system due to the fact that the aging speed of individual single batteries in the battery module is increased, and finally the use safety of the power battery can be improved.
Aiming at the policy of the power battery power exchange mode at present, the battery module balancing heat dissipation device provided by the embodiment of the invention modularizes the battery and the heat management system at the same time, only an electrical interface and a heat management system interface are reserved, and the safety and excellent output performance of the power battery in the charging and discharging process can be ensured as long as the one-to-one corresponding input and output interfaces are reserved at the upstream and the downstream (the charging station and the power device) in the implementation process.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A battery module equalizing heat dissipation device is characterized by comprising a temperature equalizing plate in heat conduction fit with a single battery, wherein a flow channel structure for allowing a temperature equalizing medium to flow is arranged in the temperature equalizing plate, and the flow channel structure is provided with a fluid inlet for allowing the temperature equalizing medium to flow in and a fluid outlet for allowing the temperature equalizing medium to flow out;
the flow channel structure comprises at least a first flow channel and a plurality of second flow channels, the first flow channel is directly communicated with the fluid inlet, the plurality of second flow channels are communicated with the fluid outlet, and the first flow channel is also communicated with the plurality of second flow channels;
the first flow channel is correspondingly arranged in an area close to a single battery tab, and the first flow channel is obliquely arranged in a downward direction along the flowing direction of the uniform temperature medium.
2. The battery module equalizing heat sink device of claim 1, wherein: the first flow passage forms an angle of 0-30 degrees with the horizontal direction.
3. The battery module equalizing heat sink device of claim 1, wherein: the plurality of second flow passages are sequentially arranged at intervals along the length direction of the first flow passage and are respectively communicated with the first flow passage;
and/or the plurality of second flow passages are arranged in parallel.
4. The battery module equalizing heat dissipation device of claim 1 or 3, wherein: the flow channel structure further comprises a third flow channel, the plurality of second flow channels are respectively communicated with the third flow channel, and the third flow channel is directly communicated with the fluid outlet.
5. The device for equalizing and cooling the battery modules according to claim 4, wherein: the third flow channel is horizontally arranged, and the plurality of second flow channels are vertically arranged between the first flow channel and the third flow channel;
and/or the fluid inlet and the fluid outlet are respectively and oppositely arranged at two opposite corners of the temperature equalizing plate.
6. The battery module equalizing heat dissipation device of claim 4, comprising a plurality of temperature equalization plates, wherein the temperature equalization plates and the plurality of single batteries are alternately arranged in sequence at intervals, and the plurality of single batteries are combined in series and/or in parallel to form a battery pack.
7. The device for equalizing and cooling the battery modules according to claim 4, wherein: the temperature equalizing plate and the single battery are arranged in a box body, and a heat insulating material is filled in a gap between the single battery and the box body.
8. The device for equalizing and cooling the battery modules according to claim 7, wherein: the fluid inlet is also connected with an inlet pipeline, the fluid outlet is also connected with an outlet pipeline, the inlet pipeline and the outlet pipeline are also connected with a heat exchange mechanism, and the flowing directions of temperature-equalizing media in the inlet pipeline and the outlet pipeline are opposite;
and/or the inlet pipeline and the outlet pipeline are also connected with a pump;
9. the device for equalizing and cooling the battery modules according to claim 8, wherein: the inlet pipeline is arranged at the upper area of the box body, the outlet pipeline is arranged at the lower area of the box body, the inlet pipeline and the outlet pipeline are correspondingly arranged at two opposite sides of the box body respectively, and at least the inlet pipeline and the outlet pipeline are locally arranged outside the box body.
10. The device for equalizing and cooling the battery modules according to claim 8, wherein: the bottom of the box body is also provided with a fixing clamping seat at least used for fixing the battery module equalizing heat dissipation device.
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| CN202110256365.0A CN113036262A (en) | 2021-03-09 | 2021-03-09 | Balanced heat abstractor of battery module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI788047B (en) * | 2021-10-12 | 2022-12-21 | 新盛力科技股份有限公司 | Battery module and battery device capable of heat dissipation |
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Application publication date: 20210625 |