CN217933959U - High-performance multi-group soft-package lithium battery structure based on phase change heat transfer device - Google Patents

High-performance multi-group soft-package lithium battery structure based on phase change heat transfer device Download PDF

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CN217933959U
CN217933959U CN202221584444.0U CN202221584444U CN217933959U CN 217933959 U CN217933959 U CN 217933959U CN 202221584444 U CN202221584444 U CN 202221584444U CN 217933959 U CN217933959 U CN 217933959U
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lithium battery
package lithium
phase
soft
plate
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汤勇
刘杭
张仕伟
黄浩舟
赵威
余小媚
黄梓滨
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Guangdong Changneng Investment Holdings Co ltd
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Guangdong Changneng Investment Holdings Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model relates to a high-performance multi-group soft package type lithium battery structure based on a phase change heat transfer device, which comprises a shell, wherein a plurality of polymer soft package lithium batteries are arranged in the shell side by side, and a phase change soaking plate is arranged outside at least one polymer soft package lithium battery; working media are arranged in the phase change soaking plate; the phase change soaking plate comprises a side plate and a bottom plate which are mutually communicated, the side plate is tightly attached to the side face of the polymer soft package lithium battery, and the bottom plate is tightly attached to the bottom face of the polymer soft package lithium battery. The phase change soaking plate can promote the direct conduction of heat, reduce the thermal contact resistance from the battery core to the battery shell and greatly reduce the heating and temperature concentration in the battery; internal heat is homogenized, and the phenomenon that the performance is influenced or even equipment is damaged due to overhigh temperature at a certain point is avoided; the charge and discharge can be carried out more efficiently, even the application of multi-power charge and discharge is carried out, and the overheating of the polymer soft package lithium battery can not be caused.

Description

High-performance multi-group soft-package lithium battery structure based on phase change heat transfer device
Technical Field
The utility model relates to a high performance battery manufacturing and designing field especially relates to a high performance multiunit soft packet shell formula lithium cell structure based on phase transition heat transfer device.
Background
In recent years, new energy industries such as electric vehicles and energy storage batteries are developed in many places, and lithium batteries are regarded as ideal energy storage elements and get higher attention. Among them, polymer soft package lithium batteries have become one of the main trends for power battery applications.
The automobile power battery can generate a large amount of heat in the process of rapid charge and discharge, the current super rapid charge is a key point of the development of the battery industry and is a difficult point, and the heat conductivity of the current traditional battery core structure is only 10-100W/mK, so that the heat transfer requirement of high heat flow density which is rapidly increased in high-performance operation is more and more difficult to meet.
The lithium battery in the prior art has the following technical problems: the contact thermal resistance between the battery core and the battery shell is large, the heating and the temperature inside the battery are concentrated, and the phenomenon that the performance is affected and the equipment is seriously damaged even if the temperature at a certain point is too high easily occurs.
With the rapid development of the new energy automobile industry and the wide attention of the public, the development of a safe and efficient automobile power battery structure is urgent.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model aims to: the utility model provides a high performance multiunit soft-packet shell type lithium cell structure based on phase transition heat transfer device, the thermal contact resistance between battery core and the battery case is less, can reduce the inside generating heat of battery by a wide margin and temperature is concentrated, makes inside heat homogenization, avoids certain point high temperature and influence the performance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-performance multi-group soft-package-type lithium battery structure based on a phase-change heat transfer device comprises a shell, wherein a plurality of polymer soft-package lithium batteries are arranged in the shell side by side, and a phase-change soaking plate is arranged outside at least one polymer soft-package lithium battery; working media are arranged in the phase change soaking plate; the phase change soaking plate comprises a side plate and a bottom plate which are mutually communicated, the side plate is tightly attached to the side face of the polymer soft package lithium battery, and the bottom plate is tightly attached to the bottom face of the polymer soft package lithium battery.
Further, the phase change soaking plate is an L-shaped phase change material with capillary strengthening capability.
Further, the thickness of the phase change soaking plate used is preferably 0.1-2mm, and the thermal conductivity is more than or equal to 1500W/mK so as to ensure the efficient heat dissipation performance.
Furthermore, the phase change soaking plate is inserted in an interference fit mode, the polymer soft package lithium battery is tightly attached to the phase change soaking plate by means of the flexibility of the polymer soft package lithium battery, and the size of the phase change soaking plate is matched with the polymer soft package lithium battery so as to ensure the heat transfer effect.
Furthermore, the base material of the phase change soaking plate is metal such as copper, aluminum and the like, and can also be prepared by using a high polymer flexible material.
Further, the polymer soft package lithium battery should have a flat surface without depressions or protrusions, otherwise, the phase change soaking plate should be tightly attached to the polymer soft package lithium battery by coating heat-conducting silicone grease.
Furthermore, the phase-change soaking plate can be inserted between every two polymer soft-package lithium battery units, or one polymer soft-package lithium battery unit or a plurality of polymer soft-package lithium batteries are inserted at intervals, so that the economical efficiency is pursued under the condition of meeting the requirement.
Furthermore, when the high-performance heat dissipation device is used at high performance, a water cooling plate can be attached to the outer surface of the shell or air cooling equipment can be added to assist the shell to dissipate heat quickly.
Further, the housing material is preferably steel, aluminum or plastic.
Further, the phase change soaking plate that the phase change soaking plate also can select to adopt the U type wraps up polymer soft packet of lithium cell bottom surface and side, makes the heat of polymer soft packet of lithium cell can directly pass to the casing through the phase change soaking plate.
Generally speaking, the utility model has the advantages that:
the side plates of the phase change soaking plate can conduct heat from the side face of the polymer soft package lithium battery, and the bottom plate can conduct heat from the bottom face of the polymer soft package lithium battery, so that direct conduction of heat can be promoted, the contact thermal resistance from a battery cell to a battery shell is reduced, and heating and temperature concentration in the battery are greatly reduced;
the heat in the polymer soft package lithium battery structure can be effectively transferred out, and the phase change soaking plate is tightly attached to the polymer soft package lithium battery, so that the internal heat is homogenized, and the phenomenon that the performance is influenced or even equipment is damaged due to overhigh temperature at a certain point is avoided;
can carry out charge and discharge more high-efficiently, carry out the application of multiplying power charge and discharge even, can not cause polymer soft packet of lithium cell overheated.
Drawings
Fig. 1 is a schematic perspective view of embodiments 1 and 2 of the present invention.
Fig. 2 is a schematic perspective view of embodiment 3 of the present invention.
In the figure: 1-shell, 2-phase change soaking plate and 3-polymer soft package lithium battery.
Detailed Description
Today, the traditional high-thermal-conductivity material is difficult to meet the requirement of high heat flow density of electronic devices, phase-change heat transfer is the most efficient heat transfer mode, and a vapor chamber is one of heat dissipation elements which are most suitable for being applied under the working condition of ultrathin high heat flow density. Because the heat dissipation performance is outstanding under the ultra-thin thickness, the heat dissipation structure is very suitable for being applied to the polymer soft package lithium battery 3 structure for heat dissipation. The thermal conductivity of the novel battery core using the phase-change heat dissipation material is changed qualitatively, and can reach hundreds of W/mK or even thousands of W/mK. Therefore the utility model discloses field such as new energy automobile, intelligent robot, portable equipment has wide development prospect.
The present invention will be described in further detail below.
Example 1
As shown in fig. 1, a high-performance multi-group soft-package lithium battery structure based on a phase-change heat transfer device comprises a shell 1, wherein a plurality of polymer soft-package lithium batteries 3 and a phase-change soaking plate 2 are arranged in the shell 1 side by side.
Wherein, the phase change soaking plate 2 is inserted between two adjacent polymer soft package lithium batteries 3 and between the polymer soft package lithium batteries 3 and the shell 1. The side plate of the phase change soaking plate 2 is tightly attached to the side surface of the polymer soft package lithium battery 3. Phase change soaking plate 2 is buckled in the bottom and is formed the bottom plate, and the bottom plate size and the soft packet of lithium cell of polymer 3 thickness phase-matches, and the bottom plate closely laminates with the bottom surface of the soft packet of lithium cell of polymer 3. The curb plate forms the phase transition soaking plate 2 of L type with the combination of bottom plate to export the inside heat of polymer soft packet of lithium cell 3 structure fast.
The phase change soaking plate 2 is an ultrathin soaking plate, the thickness of the phase change soaking plate 2 is 1mm, and the thermal conductivity is 6000W/mK.
The phase change soaking plate 2 is inserted into the polymer soft package lithium battery 3 unit by interference fit, the flexible characteristic of the polymer soft package lithium battery 3 unit is used for ensuring the tight fit with the phase change soaking plate 2, and the size of the phase change soaking plate 2 is matched with the polymer soft package lithium battery 3 unit so as to ensure the heat transfer effect.
The adopted ultrathin soaking plate base material is copper, and the working medium is deionized water. The battery case 1 is made of aluminum.
And (3) coating heat-conducting silicone grease on the concave or convex part of the polymer soft-package lithium battery 3 to enable the phase-change soaking plate 2 to be tightly attached to the polymer soft-package lithium battery 3 unit.
The phase-change soaking plate 2 is inserted in a mode that one phase-change soaking plate 2 is inserted every other polymer soft-package lithium battery 3.
Compare in other traditional polymer soft packet of lithium cell 3 structures, faster charge-discharge speed can be realized to this embodiment, and owing to with the heat homogenization and derive, use safelyr. The method has wide development prospect in the fields of unmanned aerial vehicles, intelligent robots, portable equipment and the like.
Example 2
The main differences between this embodiment and embodiment 1 are: the phase change soaking plate 2 with the thickness of 0.8mm is adopted, the heat conductivity is 1500W/mK, and the phase change soaking plate is attached by adopting heat conducting glue.
Phase transition soaking plate 2 adopts the heat-conducting adhesive to bond on the soft packet of lithium cell 3 surface of polymer, relies on the flexible characteristic of the soft packet of lithium cell 3 self of polymer to guarantee to closely laminate with phase transition soaking plate 2, and phase transition soaking plate 2's size and the soft packet of lithium cell 3 phase-matches of polymer to ensure heat transfer effect.
The adopted phase change soaking plate 2 has a base material of a high polymer material and a working medium of deionized water.
The phase-change soaking plate 2 is inserted in a mode that one phase-change soaking plate 2 is inserted every other polymer soft-package lithium battery 3.
Example 3
As shown in fig. 2, the main difference between this embodiment and embodiment 1 is: adopt the phase transition soaking plate 2 of U type, wrap up the bottom surface and two sides of every soft packet of lithium cell of polymer 3, the side adopts interference fit, makes soft packet of lithium cell of polymer 3 closely laminate with the phase transition soaking plate 2 of U type, reduces thermal contact resistance.
Compare in other traditional polymer soft packet of lithium cell 3 structures, faster charge-discharge speed can be realized to this embodiment, and owing to with the heat homogenization and derive, use safelyr. The method has wide development prospect in the fields of new energy automobiles, intelligent robots, portable equipment and the like.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims (8)

1. The utility model provides a high performance multiunit soft packet of shell type lithium cell structure based on phase transition heat transfer device which characterized in that: the phase-change heat-storage battery comprises a shell, wherein a plurality of polymer soft-package lithium batteries are arranged in the shell side by side, and a phase-change soaking plate is arranged outside at least one polymer soft-package lithium battery; working media are arranged in the phase change soaking plate;
the phase change soaking plate comprises a side plate and a bottom plate which are communicated with each other, the side plate is tightly attached to the side face of the polymer soft package lithium battery, and the bottom plate is tightly attached to the bottom face of the polymer soft package lithium battery;
one side plate of the phase change soaking plate is arranged, and the combination of one side plate and the bottom plate is of an L-shaped structure.
2. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: and the side plates are in interference fit with the polymer soft package lithium batteries on the two sides of the side plates.
3. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: the polymer soft package lithium battery has a flat surface.
4. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: and heat-conducting silicone grease is filled between the polymer soft-package lithium battery and the phase-change soaking plate.
5. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: the shell material is steel, aluminum or plastic.
6. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: the phase change soaking base plate is made of metal or high polymer flexible material.
7. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: the thickness of the phase change soaking plate is 0.1-2mm, and the thermal conductivity is more than or equal to 1500W/mK.
8. The structure of the high-performance multi-group soft-package lithium battery based on the phase-change heat transfer device as claimed in claim 1, is characterized in that: the working medium is deionized water.
CN202221584444.0U 2022-06-23 2022-06-23 High-performance multi-group soft-package lithium battery structure based on phase change heat transfer device Active CN217933959U (en)

Priority Applications (1)

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CN202221584444.0U CN217933959U (en) 2022-06-23 2022-06-23 High-performance multi-group soft-package lithium battery structure based on phase change heat transfer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202221584444.0U CN217933959U (en) 2022-06-23 2022-06-23 High-performance multi-group soft-package lithium battery structure based on phase change heat transfer device

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CN217933959U true CN217933959U (en) 2022-11-29

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