CN215989076U - Multi-level thermal management structure of battery pack and battery pack - Google Patents
Multi-level thermal management structure of battery pack and battery pack Download PDFInfo
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- CN215989076U CN215989076U CN202122510107.9U CN202122510107U CN215989076U CN 215989076 U CN215989076 U CN 215989076U CN 202122510107 U CN202122510107 U CN 202122510107U CN 215989076 U CN215989076 U CN 215989076U
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Abstract
The utility model provides a multilayer thermal management structure of a battery pack and the battery pack, wherein the multilayer thermal management structure comprises a battery bin and a battery pack arranged in the battery bin; the battery pack comprises a plurality of single batteries arranged in the same direction, each single battery comprises an end part, a bottom part and a shell, and the end parts of the single batteries are arranged in the battery bin in an inverted mode downwards; the battery compartment is internally provided with a heat insulation bonding layer and a fluid temperature equalizing layer from bottom to top in sequence, the end part of the single battery is fixed on the bottom surface of the battery compartment through the heat insulation bonding layer, and at least part of the shell of the single battery is soaked in the fluid temperature equalizing layer. According to the utility model, the thermal insulation bonding layer and the fluid temperature equalizing layer are arranged in the battery compartment in a laminated manner, so that the protection capability of the thermal runaway single battery on the transverse thermal spread of the peripheral normal single battery at a short distance is improved, and the integral temperature equalizing thermal management of the battery compartment is realized.
Description
Technical Field
The utility model belongs to the technical field of batteries, and relates to a multi-layer thermal management structure of a battery pack and the battery pack.
Background
With the continuous enhancement of the low-carbon and environment-friendly concept of life of the society, the electric automobile gradually enters the daily life of people as a novel travel tool, brings great convenience to the life of people and avoids negative effects on the environment. In order to pursue high energy density and high endurance, the thickness of a diaphragm in a battery of the conventional electric automobile is reduced, so that certain potential safety hazard is caused to the safety of the battery, and thermal runaway is easily caused. In the case of lithium ion batteries, when the temperature is too high or the charging voltage is too high, a lot of potential heat release side effects are caused, and if the heat is not dissipated, the temperature and the pressure of the battery can rise rapidly, and finally the thermal runaway of the battery is caused. With the occurrence of a spontaneous combustion event, the industry begins to examine the quality problem behind the spontaneous combustion event, so that the safety of a battery and a whole vehicle is ensured while the energy density and the endurance mileage of a new energy vehicle are improved, and the key problem to be solved at present is solved.
In the conventional technology, as one of means for improving the safety of the battery box, a waterproof vent valve (also called a PUW relief valve) is arranged on the box, so that when the pressure in the battery box reaches the blowout value of the waterproof vent valve, the pressure can be relieved through the waterproof vent valve, but the waterproof relief valve only has a pressure relief function and does not have a thermal runaway management function.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a multi-layer thermal management structure of a battery pack and the battery pack.
In order to achieve the purpose, the utility model adopts the following technical scheme:
in a first aspect, the present invention provides a multi-layer thermal management structure for a battery pack, where the multi-layer thermal management structure includes a battery compartment and a battery pack disposed in the battery compartment; the battery pack comprises a plurality of single batteries arranged in the same direction, each single battery comprises an end part, a bottom part and a shell, and the end parts of the single batteries are arranged in the battery bin in an inverted mode downwards;
the battery compartment is internally provided with a heat insulation bonding layer and a fluid temperature equalizing layer from bottom to top in sequence, the end part of the single battery is fixed on the bottom surface of the battery compartment through the heat insulation bonding layer, and at least part of the shell of the single battery is soaked in the fluid temperature equalizing layer.
According to the utility model, the shell near the battery pole column end of each single battery is subjected to interval fixation and wrapping isolation through the heat insulation bonding layer, so that the protection capability of the thermal runaway single battery on the transverse thermal spreading of the peripheral short-distance normal single battery is improved, the excessive increase of the temperature of other peripheral single batteries is favorably delayed, the thermal runaway of the other peripheral single batteries is prevented or at least the time for triggering the thermal runaway is delayed, and the continuous series burning and even the integral burning explosion of a battery module or a battery pack caused by the thermal runaway of a certain single battery are prevented or delayed; in addition, set up the fluid samming layer in monomer battery casing local area, along with the medium flow on fluid samming layer, the heat of soaking in the casing surface on fluid samming layer is taken away from thermal runaway monomer battery surface fast, divide equally to fluid samming layer and other normal monomer battery's the big heat capacity, effectively prevent that the heat from spreading to other adjacent monomer battery nearby, prevent the too fast increase of thermal runaway monomer battery casing surface temperature, and restrain adjacent normal monomer battery casing surface temperature and receive the direct influence that closely thermal spread, realize the whole samming heat management in battery storehouse.
It should be noted that the "fluid temperature equalizing layer" in the present invention refers to a flowing medium with an autonomous heat equalizing convection capability, preferably silicone oil, the heat which is radially below the end face of the pressure relief valve and cannot enter the heat dredging bin and the heat which backflows upwards, and the heat which is isolated by the solid heat insulating layer and cannot spread transversely on the end surface of the pressure release valve is diffused upwards along the radial direction of the shell, and is emitted on the surface of the shell in the fluid temperature equalizing layer, the temperature equalizing medium which automatically flows can continuously take away the heat on the surface of the thermal runaway monomer, because the fluid temperature equalizing layer and other batteries are low-temperature large-heat-capacity bodies, the temperature rise is very slow, the temperature of the flowing medium on the surface of the backflow thermal runaway monomer is still in a low-temperature state, and the thermal runaway monomer has the capability of carrying away high heat on the surface of the thermal runaway monomer again, thereby suppressing an excessive increase in the temperature of the adjacent surface of the normal cell in the periphery thereof and reducing the thermal influence on the normal cell. The utility model adopts the flowing medium for temperature equalization, has strong temperature equalization capability, does not have other cooling equipment such as pipelines and the like, has large thermal contact area, high conduction efficiency and strong heat dredging capability, ensures the temperature equalization of the single batteries compared with the traditional heat dissipation cooling mode, and is more beneficial to controlling other single batteries to reach the thermal high point of thermal runaway.
As a preferred technical scheme of the present invention, an internal space of the battery compartment is divided into an upper thermal temperature equalizing compartment and a lower thermal channeling compartment by a thermal partition, the battery pack is placed upside down in the thermal temperature equalizing compartment, and the thermal insulation bonding layer and the fluid temperature equalizing layer are sequentially disposed on a side surface of the thermal partition, which is close to the thermal temperature equalizing compartment, from bottom to top.
As a preferred technical solution of the present invention, the end of the single battery includes at least one terminal and a pressure release valve, a valve or an exposure window that is opened to the thermal dispersion bin in a single direction is disposed at a position on the thermal partition corresponding to the pressure release valve, and heat discharged from the pressure release valve of the thermal runaway single battery flows through the valve or the exposure window and is discharged into the thermal dispersion bin, and is collected by the thermal dispersion bin and then is dispersed.
According to the multi-layer heat management structure provided by the utility model, after the thermal runaway phenomenon of the single battery occurs, high heat flow discharged by the pressure release valve of the single battery is sprayed to a valve or an exposure window (medium pressure) from the lower part of a vehicle to the thermal dredging bin (low pressure) and then to the outside of the box (no pressure), and the volume density (power density) of the heat flow is gradually reduced, so that the purposes of thermal protection of normal batteries in the upper thermal dredging bin, thermal protection of personnel and property on the upper layer of a battery pack and thermal dredging of the heat flow to a safe region outside the box are realized.
As a preferable technical solution of the present invention, a solid heat insulating layer is further disposed between the heat insulating bonding layer and the fluid temperature equalizing layer, and the solid heat insulating layer is filled between the single batteries and the casing near the end portion, and is used for thermal isolation between the heating casing near the end portion of the thermal runaway single battery and the corresponding portion of the adjacent normal single battery.
The heat insulation bonding layer is mainly used for quickly fixing the distance between adjacent single batteries, the upper end faces of the single batteries, the bus bars, the lower surface of the solid heat insulation layer and the upper surface of the heat partition plate, and the lower surface of the solid heat insulation layer and the side wall of the end face of the pressure release valve are connected to form an integrated structure. The solid heat insulating layer is mainly used for isolating adjacent poles and partial shells of adjacent single batteries through heat convection and heat conduction, the battery poles without thermal runaway are isolated from the battery poles with the thermal runaway, the height direction of the solid heat insulating layer is from the lower part of the end part shell to a certain height of the end part shell of the pressure release valve end face, preferably to the neck part of the cylindrical battery, and optionally, the solid heat insulating layer is controlled to be about 20 mm. The part of the solid heat insulation layer below the end face of the battery pressure release valve corresponds to the area where the pressure release valve is located, and wraps the pressure release valve to form a closed heat dredging area which is surrounded by the side wall of the solid heat insulation layer, the end face of the pressure release valve and the partition plate.
As a preferable technical solution of the present invention, an insulating layer and a heat exchange layer are further sequentially disposed on a surface of the fluid temperature equalizing layer, and the insulating layer is disposed at the bottom of the single battery and/or the housing near the bottom of the single battery.
As a preferred technical solution of the present invention, the heat exchange layer includes a heat conduction layer and a heat absorption medium layer; the heat conducting layer comprises a heat conductor arranged on the surface of the isolation layer, the inner wall of the thermal temperature equalizing bin and the periphery of the shell at the bottom of the single battery, and is used for directly conducting heat to the bottom of the single battery and conducting heat to the thermal temperature equalizing layer from the side face.
As a preferable technical solution of the present invention, a vacuum layer or an inert gas layer is further provided between the fluid temperature equalizing layer and the heat absorbing medium layer.
As a preferred technical solution of the present invention, the heat-absorbing medium layer is any one of or a combination of at least two of an external circulation water cooling plate, a heat pipe, a semiconductor cooling plate, or a phase-change material.
According to a preferable technical scheme of the utility model, the heat insulation bonding layer is made of polyurea.
It should be noted that, the polyurea is used as the heat insulation bonding layer, and the advantages are as follows: the polyurea can be rapidly solidified within 10s at normal temperature and realize closed bonding coverage.
The solid heat insulating layer is made of foamed polyurethane or phenolic aldehyde.
The solid heat insulating layer provided by the utility model is preferably made of a high heat insulating foaming material, but the high heat insulating foaming material is a powdery polymer and has the possibility of dispersion under the continuous impact of a fluid, so the lower surface of the high heat insulating foaming material is subjected to surface sealing by a heat insulating bonding layer, and the upper surface of the high heat insulating foaming material is subjected to surface sealing by an insulating film with one surface being coated with adhesive.
The medium adopted by the fluid temperature-equalizing layer is silicone oil.
In a second aspect, the present invention provides a battery pack with a thermal management function, wherein the battery pack includes the thermal management structure of the first aspect.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the shell near the battery pole column end of each single battery is subjected to interval fixation and wrapping isolation through the heat insulation bonding layer, so that the protection capability of the thermal runaway single battery on the transverse thermal spreading of the peripheral short-distance normal single battery is improved, the excessive increase of the temperature of other peripheral single batteries is favorably delayed, the thermal runaway of the other peripheral single batteries is prevented or at least the time for triggering the thermal runaway is delayed, and the continuous series burning and even the integral burning explosion of a battery module or a battery pack caused by the thermal runaway of a certain single battery are prevented or delayed; in addition, set up the fluid samming layer in monomer battery casing local area, along with the medium flow on fluid samming layer, the heat of soaking in the casing surface on fluid samming layer is taken away from thermal runaway monomer battery surface fast, divide equally to fluid samming layer and other normal monomer battery's the big heat capacity, effectively prevent that the heat from spreading to other adjacent monomer battery nearby, prevent the too fast increase of thermal runaway monomer battery casing surface temperature, and restrain adjacent normal monomer battery casing surface temperature and receive the direct influence that closely thermal spread, realize the whole samming heat management in battery storehouse.
Drawings
FIG. 1 is a schematic diagram of a multi-level thermal management structure according to an embodiment of the present invention.
Wherein, 1-heat insulation bonding layer; 2-solid insulating layer; 3-a single cell; 4-a shell; 5-a pressure relief valve; 6-pole column; 7-bottom; 8-end; 9-fluid temperature equalization layer; 10-an insulating layer; 11-a thermally conductive layer; 12-a heat-absorbing medium layer; 13-vacuum layer.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
In a specific embodiment, the present invention provides a multi-layer thermal management structure of a battery pack, as shown in fig. 1, including a battery compartment and a battery pack disposed in the battery compartment; the battery pack comprises a plurality of single batteries 3 arranged in the same direction, each single battery 3 comprises an end part 8, a bottom part 7 and a shell 4, and the end parts 8 of the single batteries 3 are arranged in the battery bin in a downward and inverted mode;
the battery compartment is internally provided with a heat insulation bonding layer 1 and a fluid temperature-equalizing layer 9 from bottom to top in sequence, the end part 8 of the single battery 3 is fixed on the bottom surface of the battery compartment through the heat insulation bonding layer 1, and at least part of the shell 4 of the single battery 3 is soaked in the fluid temperature-equalizing layer 9.
According to the utility model, the shell 4 near the end of the battery post 6 of each single battery 3 is subjected to interval fixation and wrapping isolation through the heat insulation bonding layer 1, so that the protection capability of the thermal runaway single battery 3 on the transverse thermal spread of the peripheral short-distance normal single battery 3 is improved, the excessive increase of the temperature of other peripheral single batteries 3 is favorably delayed, the thermal runaway of the other peripheral single batteries is prevented or the time for causing the thermal runaway is at least delayed, and the continuous series combustion and even the integral explosion of a battery module or a battery pack caused by the thermal runaway of a certain single battery 3 are prevented or delayed; in addition, a fluid temperature equalizing layer 9 is arranged in the area where the single battery shell 4 is located, along with the medium flowing of the fluid temperature equalizing layer 9, heat soaked on the outer surface of the shell 4 of the fluid temperature equalizing layer 9 is rapidly brought away from the surface of the thermal runaway single battery 3 and is evenly distributed to the large heat capacity of the fluid temperature equalizing layer 9 and other normal single batteries 3, the heat is effectively prevented from spreading to other adjacent single batteries 3 nearby, the excessive increase of the surface temperature of the thermal runaway single battery shell 4 is prevented, the direct influence of the close-distance thermal spreading on the surface temperature of the adjacent normal single battery shell 4 is inhibited, and the overall temperature equalizing heat management of the battery compartment is realized.
It should be noted that the "fluid temperature equalizing layer 9" described in the present invention refers to a flowing medium having an autonomous thermal equalizing convection capability, preferably, silicon oil is used, the heat which cannot enter the thermal dredging bin and the heat which flows upward due to back flush in the radial direction below the end surface of the pressure release valve 5, and the heat which cannot laterally spread and is isolated by the solid heat insulating layer 2 at the end surface of the pressure release valve 5 will diffuse upward in the radial direction of the casing 4, and will be dissipated at the surface of the casing 4 in the fluid temperature equalizing layer 9, the autonomously flowing temperature equalizing medium will continuously take away the heat at the surface of the thermal runaway monomer, because the fluid temperature equalizing layer 9 and other batteries are both low-temperature large-heat-capacity bodies, the temperature rise is very slow, the temperature of the flowing medium at the surface of the thermal runaway monomer will still be in a low-temperature state, and have the capability of taking away the high heat at the surface of the thermal runaway monomer again, thereby suppressing the excessive increase of the adjacent surface temperature of the normal battery at the periphery thereof, the thermal influence on the normal battery is reduced. The utility model adopts the flowing medium for temperature equalization, has strong temperature equalization capability, does not have other cooling equipment such as pipelines and the like, has large thermal contact area, high conduction efficiency and strong heat dredging capability, ensures the temperature equalization of the single batteries 3 compared with the traditional heat dissipation cooling mode, ensures the temperature equalization of the single batteries 3 and is more beneficial to controlling other single batteries 3 to reach the thermal high point of thermal runaway.
Further, the inner space of the battery compartment is divided into an upper heat temperature equalizing compartment and a lower heat dredging compartment by a heat partition plate, the battery pack is arranged in the heat temperature equalizing compartment upside down, and the heat insulation bonding layer 1 and the fluid temperature equalizing layer 9 are sequentially arranged on the surface of one side, close to the heat temperature equalizing compartment, of the heat partition plate from bottom to top.
Further, the end portion 8 of the single battery 3 comprises at least one pole 6 and a pressure release valve 5, a valve or an exposure window which is opened to the thermal dredging bin in a single direction is arranged on the position, corresponding to the pressure release valve 5, of the thermal partition plate, heat discharged by the pressure release valve 5 of the thermal runaway single battery 3 flows through the valve or the exposure window to be discharged into the thermal dredging bin, and is drained after being collected by the thermal dredging bin.
According to the multi-layer thermal management structure provided by the utility model, after the thermal runaway phenomenon of the single battery 3 occurs, the high-heat flow discharged by the pressure release valve 5 of the single battery 3 is prevented from damage (the pressure release valve 5 sprays (high pressure) to a valve or an exposure window (medium pressure) to the thermal dredging bin (low pressure) to the outside of the box (no pressure), and the volume density (power density) of the heat flow is gradually reduced, so that the purposes of thermal protection of normal batteries in the upper thermal dredging bin, thermal protection of personnel and property on the upper layer of a battery pack and thermal dredging of the heat flow to a safe area outside the box are realized.
Further, a solid heat insulation layer 2 is further arranged between the heat insulation bonding layer 1 and the fluid temperature equalizing layer 9, and the solid heat insulation layer 2 is filled between the single batteries 3 close to the shell 4 of the end part 8 and used for heat isolation of the heating shell 4 of the end part 8 and the corresponding part of the adjacent normal single batteries 3, wherein the heat isolation shell is close to the end part 8.
The heat insulation bonding layer 1 is mainly used for quickly fixing the distance between adjacent single batteries 3, the upper end faces of the single batteries 3, the bus bars, the lower surface of the solid heat insulation layer and the upper surface of the heat partition plate, and the lower surface of the solid heat insulation layer and the side wall of the end face of the pressure release valve 5 to form an integrated structure. The solid heat insulation layer 2 is mainly used for isolating adjacent poles 6 and partial shells 4 of adjacent single batteries 3 in terms of thermal convection and thermal conduction, and since the battery poles 6 without thermal runaway and the battery poles 6 with thermal runaway are isolated from each other through the solid heat insulation layer 2, the height direction of the solid heat insulation layer 2 is from the lower part of the end face of the pressure release valve 5 to the end part 8 shell 4 with a certain height, preferably to the neck of a cylindrical battery, and optionally, the solid heat insulation layer 2 is controlled to be about 20 mm. The part of the solid heat insulation layer 2 below the end face of the battery pressure release valve 5 corresponds to the area where the pressure release valve 5 is located, and the pressure release valve 5 is wrapped to form a closed heat dredging area which is surrounded by the side wall of the solid heat insulation layer 2, the end face of the pressure release valve 5 and the partition plate.
Further, an insulating layer 10 and a heat exchange layer are sequentially arranged on the surface of the fluid temperature equalizing layer 9, wherein the insulating layer 10 is arranged at the bottom 7 of the single battery 3 and/or the shell 4 near the bottom 7 of the single battery 3.
Further, the heat exchange layer includes a heat conductive layer 11 and a heat absorbing medium layer 12; the heat-conducting layer 11 is including setting up insulating layer 10 surface heat samming storehouse inner wall and the heat conductor of 3 bottoms 7 casing 4 peripheries of battery cell, it is direct right to be used for the direct 3 bottoms 7 of battery cell to and carry out heat-conduction to fluid samming layer 9 from the side.
Further, a vacuum layer 13 or an inert gas layer is arranged between the fluid temperature equalizing layer 9 and the heat absorbing medium layer 12.
Further, the heat-absorbing medium layer 12 is any one of an external circulating water cooling plate, a heat pipe, a semiconductor cooling plate, or a phase-change material, or a combination of at least two of them.
Further, the material adopted by the heat insulation bonding layer 1 is polyurea.
It should be noted that, the polyurea is adopted as the heat insulation bonding layer 1 in the present invention, and the advantages are as follows: the polyurea can be rapidly solidified within 10s at normal temperature and realize closed bonding coverage.
The solid heat insulating layer 2 is made of foamed polyurethane or phenolic aldehyde.
The solid heat insulating layer 2 provided by the present invention is preferably made of a high heat insulating foamed material, but since the high heat insulating foamed material is a powdery polymer and has a possibility of scattering under the continuous impact of a fluid, the lower surface thereof is surface-sealed by a heat insulating adhesive layer, and the upper surface thereof is surface-sealed by an insulating film with one side being coated with an adhesive.
The medium adopted by the fluid temperature equalizing layer 9 is silicone oil.
In another embodiment, the utility model provides a battery pack with a thermal management function, wherein the battery pack comprises the thermal management structure provided by the above embodiment.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The multi-layer thermal management structure of the battery pack is characterized by comprising a battery bin and a battery pack arranged in the battery bin; the battery pack comprises a plurality of single batteries arranged in the same direction, each single battery comprises an end part, a bottom part and a shell, and the end parts of the single batteries are arranged in the battery bin in an inverted mode downwards;
the battery compartment is internally provided with a heat insulation bonding layer and a fluid temperature equalizing layer from bottom to top in sequence, the end part of the single battery is fixed on the bottom surface of the battery compartment through the heat insulation bonding layer, and at least part of the shell of the single battery is soaked in the fluid temperature equalizing layer.
2. The multi-layer thermal management structure of the battery pack according to claim 1, wherein the internal space of the battery compartment is divided into an upper thermal temperature equalization compartment and a lower thermal channeling compartment by a thermal partition plate, the battery pack is placed upside down in the thermal temperature equalization compartment, and the thermal insulation bonding layer and the fluid temperature equalization layer are sequentially arranged on the surface of one side, close to the thermal temperature equalization compartment, of the thermal partition plate from bottom to top.
3. The multi-level thermal management structure of the battery pack according to claim 2, wherein the end of the single battery comprises at least one terminal and a pressure release valve, a valve or an exposure window which is opened to the thermal dispersion bin in a single direction is arranged on the thermal partition plate at a position corresponding to the pressure release valve, and heat discharged by the pressure release valve of the thermal runaway single battery flows through the valve or the exposure window and is discharged into the thermal dispersion bin, and is collected by the thermal dispersion bin and then is dispersed.
4. The multi-layered thermal management structure of the battery pack according to claim 1, wherein a solid thermal insulation layer is further disposed between the thermal insulation bonding layer and the fluid temperature equalizing layer, and the solid thermal insulation layer is filled between the single batteries and the casings near the end portions, and is used for thermal isolation between the heating casings near the end portions of the thermal runaway single batteries and corresponding portions of adjacent normal single batteries.
5. The multi-layer thermal management structure of the battery pack according to claim 2, wherein an insulating layer and a heat exchange layer are sequentially arranged on the surface of the fluid temperature equalization layer, and the insulating layer is arranged at the bottom of the single battery and/or the shell near the bottom of the single battery.
6. The multi-level thermal management structure of a battery pack of claim 5, wherein the heat exchange layer comprises a heat conducting layer and a heat absorbing medium layer; the heat conducting layer comprises a heat conductor arranged on the surface of the isolation layer, the inner wall of the thermal temperature equalizing bin and the periphery of the shell at the bottom of the single battery, and is used for directly conducting heat to the bottom of the single battery and conducting heat to the thermal temperature equalizing layer from the side face.
7. The multi-layered heat management structure of a battery pack according to claim 6, wherein a vacuum layer or an inert gas layer is further disposed between the fluid temperature equalizing layer and the heat absorbing medium layer.
8. The multi-layered heat management structure of the battery pack according to claim 6, wherein the heat-absorbing medium layer is any one or a combination of at least two of an external circulating water cooling plate, a heat pipe, a semiconductor cooling plate or a phase change material.
9. The multi-level thermal management structure of a battery pack according to claim 4, wherein the thermal insulation bonding layer is made of polyurea;
the solid heat insulating layer is made of foamed polyurethane or phenolic aldehyde;
the medium adopted by the fluid temperature-equalizing layer is silicone oil.
10. A battery pack having a thermal management function, wherein the battery pack comprises a multi-layered thermal management structure of the battery pack according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122510107.9U CN215989076U (en) | 2021-10-19 | 2021-10-19 | Multi-level thermal management structure of battery pack and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122510107.9U CN215989076U (en) | 2021-10-19 | 2021-10-19 | Multi-level thermal management structure of battery pack and battery pack |
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| CN215989076U true CN215989076U (en) | 2022-03-08 |
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| CN202122510107.9U Active CN215989076U (en) | 2021-10-19 | 2021-10-19 | Multi-level thermal management structure of battery pack and battery pack |
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