Heat conduction device, power battery assembly and vehicle

Abstract

The invention provides a heat conduction device, a power battery assembly and a vehicle, and relates to the technical field of vehicle engineering.According to the heat conduction device, a power battery body is wrapped by a protective shell, a heat conduction frame is installed in the protective shell and connected with the power battery body, and a heat storage disc is connected with the heat conduction frame; a heat conduction metal sleeve extending in the horizontal direction is installed at the bottom of the heat storage disc, one end of the heat pipe is inserted into the heat conduction metal sleeve, the other end of the heat pipe extends out of the heat conduction metal sleeve, and condensate occupying partial space in the heat pipe can absorb heat and be gasified at one end in the heat conduction metal sleeve. The gasified cooling liquid can be condensed into a liquid phase at the end extending out of the heat conduction metal sleeve, the condensate surges towards the high-temperature end under the capillary effect of the heat pipe, the condensate flowing back to the end in the heat conduction metal sleeve absorbs heat and is gasified again, and the process is repeated, so that electric drive is not needed, and energy is saved. The power supply burden of the power battery body is reduced, and the heat dissipation process is more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and in particular to a heat conduction device, a power battery assembly and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, power batteries, as core components, have a direct impact on the overall performance of the vehicle. Existing vehicle power batteries usually use air cooling or water cooling to dissipate heat to maintain the operating temperature of the battery within an appropriate range. Both air cooling and water cooling require an electric drive cooling system to effectively dissipate heat from the battery. However, under certain extreme conditions, such as high temperature environments or when the battery is close to thermal runaway, the battery's power supply performance may decline, which not only affects the efficiency of the cooling system, but may also cause the heat dissipation effect to further deteriorate. In this case, the temperature control of the power battery becomes more difficult, which may accelerate the occurrence of thermal runaway and pose a threat to the safety of the vehicle. Summary of the invention

[0003] The object of the present invention is to provide a heat conducting device, a power battery assembly and a vehicle to alleviate the technical problem that the heat dissipation of the power battery needs to rely on power supply.

[0004] In a first aspect, the present invention provides a heat conduction device, comprising: a protective housing, a heat conduction frame, a heat storage plate, a heat conduction metal sleeve and a heat pipe; The protective shell is used to wrap the power battery body, the heat-conducting frame is installed in the protective shell, and the heat-conducting frame is connected to the power battery body; The heat storage tray is connected to the heat conduction frame, and the heat conduction metal sleeve extending in the horizontal direction is installed at the bottom of the heat storage tray; Both ends of the heat pipe are respectively provided with water drop-shaped ends, and one end of the heat pipe is inserted into the interior of the heat conductive metal sleeve, and the other end extends to the exterior of the heat conductive metal sleeve.

[0005] In combination with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the heat conduction device further comprises: a coolant tank; One end of the heat pipe extending to the outside of the heat-conducting metal sleeve is inserted into the coolant tank.

[0006] In combination with the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the heat-conductive metal sleeve is connected to a wide-mouth air guide plate.

[0007] In combination with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein an air duct is connected to the air outlet side of the wide-mouth air duct plate, and the air duct extends and passes through the coolant tank.

[0008] In combination with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the air duct has a bending section, and the bending section is located in the coolant tank.

[0009] In combination with the third possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the coolant tank is connected to an air cooling box, and the air cooling box is provided with an exhaust window communicating with the outside; The air guide duct extends and is connected to the air cooling box.

[0010] In combination with the fifth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the coolant tank is connected to a heat dissipation water pipe, and the heat dissipation water pipe extends into the air cooling box.

[0011] In combination with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein a metal wire ball is installed in the air cooling box, and the heat dissipation water pipe is inserted into the interior of the metal wire ball.

[0012] In combination with the second possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein a dust filter is installed inside the opening of the wide-mouth air ducting plate.

[0013] In combination with the second possible implementation manner of the first aspect, the present invention provides a ninth possible implementation manner of the first aspect, wherein a mud guard is installed below the wide-mouth air duct plate.

[0014] In a second aspect, the power battery assembly provided by the present invention is equipped with the heat conduction device described in the first aspect.

[0015] In a third aspect, the present invention provides a vehicle equipped with the heat conduction device described in the first aspect.

[0016] The embodiments of the present invention bring the following beneficial effects: a protective shell is used to wrap the power battery body, a heat-conducting frame is installed in the protective shell, and the heat-conducting frame is connected to the power battery body, a heat storage disk is connected to the heat-conducting frame, and a heat-conducting metal sleeve extending in a horizontal direction is installed at the bottom of the heat storage disk, and water drop-shaped ends are respectively arranged at both ends of the heat pipe, and one end of the heat pipe is inserted into the interior of the heat-conducting metal sleeve and the other end extends to the outside of the heat-conducting metal sleeve, so that the condensate occupying part of the space inside the heat pipe can absorb heat and vaporize at one end inside the heat-conducting metal sleeve, and the vaporized coolant can condense into a liquid phase at the end extending to the outside of the heat-conducting metal sleeve, and then the condensate will surge toward the end with a higher temperature under the capillary effect of the heat pipe, and the condensate flowing back to one end inside the heat-conducting metal sleeve will absorb heat and vaporize again, and this cycle will be repeated without the need to use electric drive, which greatly reduces the power supply burden of the power battery body and makes the heat dissipation process more reliable.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a heat conduction device and a power battery body provided in an embodiment of the present invention; Figure 2 A schematic diagram of a power battery body, a heat conducting frame, a coolant tank and an air cooling box of a heat conducting device provided in an embodiment of the present invention; Figure 3 A schematic diagram of a heat conducting device provided by an embodiment of the present invention with the protective housing removed; Figure 4 A schematic diagram of a heat-conducting frame, a heat storage plate, a heat-conducting metal sleeve and a heat pipe of a heat-conducting device provided in an embodiment of the present invention; Figure 5 A schematic diagram of a heat-conducting metal sleeve, a heat pipe, a coolant tank, an air cooling tank and an air duct of a heat-conducting device provided in an embodiment of the present invention; Figure 6 A schematic diagram of a heat-conducting metal sleeve, a coolant tank, an air-cooling tank and a metal wire ball of a heat-conducting device provided in an embodiment of the present invention; Figure 7A schematic diagram of a heat-conducting metal sleeve, a coolant tank, an air cooling tank, an air duct and a heat dissipation water pipe of a heat-conducting device provided in an embodiment of the present invention.

[0020] Icons: 1-protective shell; 2-power battery body; 3-heat conduction frame; 4-heat storage plate; 5-heat conductive metal sleeve; 6-heat pipe; 7-coolant tank; 8-air cooling box; 9-wide-mouth air inlet plate; 10-air duct; 11-exhaust window; 12-heat dissipation water pipe; 13-metal wire ball; 14-dust filter; 15-mudguard. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the heat-conducting device provided in the embodiment of the present invention includes: a protective shell 1, a heat-conducting frame 3, a heat storage disk 4, a heat-conducting metal sleeve 5 and a heat pipe 6; the protective shell 1 is used to wrap the power battery body 2, the heat-conducting frame 3 is installed in the protective shell 1, and the heat-conducting frame 3 is connected to the power battery body 2; the heat storage disk 4 is connected to the heat-conducting frame 3, and a heat-conducting metal sleeve 5 extending in a horizontal direction is installed at the bottom of the heat storage disk 4; both ends of the heat pipe 6 are respectively provided with water drop-shaped ends, and one end of the heat pipe 6 is inserted into the inside of the heat-conducting metal sleeve 5, and the other end extends to the outside of the heat-conducting metal sleeve 5.

[0025] In this embodiment, the protective shell 1 is installed on the chassis of the car to protect the power battery body 2 inside, and plays the role of shock absorption, impact resistance, and cutting resistance. A close-fitting heat-conducting frame 3 is distributed on the surrounding side of the power battery body 2, and the heat-conducting frame 3 is fully fixed on the power battery body 2. A heat storage disk 4 is installed at the bottom of the power battery body 2, and each end of the heat-conducting frame 3 is connected to the heat storage disk 4. A plurality of evenly distributed heat-conducting metal sleeves 5 are installed at the bottom of the heat storage disk 4. The heat-conducting metal sleeves 5 are all horizontally arranged, and heat pipes 6 are installed inside the heat-conducting metal sleeves 5. Both ends of the heat pipe 6 are water drop-shaped ends, and one end of the heat pipe 6 extends to the heat conduction. Outside the metal sleeve 5, when the power battery body 2 is running, the heat generated by each battery module will be gradually transferred to the heat storage disk 4 through the heat-conducting frame 3 distributed on the side, and the heat storage disk 4 will transfer the heat to each heat pipe 6 through the heat-conducting metal sleeve 5. Condensate is stored in the heat pipe 6, and the condensate occupies part of the internal space of the heat pipe 6. The other areas inside the heat pipe 6 are close to a vacuum state. The heat pipe 6 is heated at one end inside the heat-conducting metal sleeve 5, and its water drop-shaped front end will cause heat to gather. In the vacuum low-pressure environment, the evaporation temperature of the condensate is greatly reduced, so that the coolant can be quickly vaporized, thereby causing the internal condensate to heat up quickly and quickly. The heat pipe 6 is heated and the overall temperature rises, and the vaporized condensed liquid gradually moves toward the other end of the heat pipe 6. After the vaporized cooling moves to the colder end, it will recondense into a liquid phase, and the heat absorbed before will be dissipated at this end. After that, the condensed liquid will surge toward the end with a higher temperature under the capillary effect of the heat pipe 6, so that the condensed liquid will flow back to the end of the heat pipe 6 located inside the heat conductive metal sleeve 5, and the condensed liquid will continue to absorb heat and vaporize, and this cycle will repeat. At the beginning, the heat of the power battery body 2 is conducted by utilizing the huge latent heat effect in the gas-liquid conversion process of the condensate, which not only can realize the rapid cooling of the power battery body 2, but also the whole conversion process uses heat as the power source, and the heat dissipation process is carried out spontaneously, without relying on the power system, and there is no need to rely on external air cooling or water cooling devices that use electricity as the power source, which greatly reduces the burden of power supply to the power battery body 2 itself. The heat dissipation process is stable and reliable. Even if the circuit is burned out after the power battery body 2 thermally runs away, the heat-conducting frame 3, the heat storage disk 4, the heat-conducting metal sleeve 5 and the heat pipe 6 can still continue to dissipate heat for the power battery body 2.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the thermal conduction device further includes a coolant tank 7 ; a heat pipe 6 extending to an end outside the thermal conduction metal sleeve 5 is inserted into the coolant tank 7 .

[0027] Among them, a large amount of coolant is stored inside the coolant tank 7, and a plurality of through holes are provided on one side of the coolant tank 7. One end of each heat pipe 6 located outside the heat-conducting metal sleeve 5 passes through each through hole and extends to the inside of the coolant tank 7. The joints between the heat pipe 6 and the through hole are sealed to prevent leakage. When the condensate inside the heat pipe 6 is vaporized by the protective housing 1 under the action of the heat conducted by the heat-conducting metal sleeve 5, the vaporized condensate will be transferred to one end of the heat pipe 6 located inside the coolant tank 7. The large amount of coolant inside the coolant tank 7 will keep the temperature of this end of the heat pipe 6 much lower than that of the other end, accelerate the movement of the vaporized condensate inside the heat pipe 6, and enable the vaporized condensate to be quickly condensed back to the liquid phase inside the colder end of the heat pipe 6, and then reflux under the action of the capillary effect. The coolant tank 7 and the coolant inside it not only accelerate the process of gas-liquid conversion of the condensate inside the heat pipe 6, but also ensure that the large amount of heat carried by the condensate can be quickly absorbed, making the heat dissipation process of the power battery body 2 more stable.

[0028] See also Figure 3 The heat-conducting metal sleeve 5 is connected with a wide-mouthed air induction plate 9. The opening of the wide-mouthed air induction plate 9 is tilted downward, and the wide-mouthed air induction plate 9 is connected to the bottom of multiple heat-conducting metal sleeves 5. Part of the heat of the heat-conducting metal sleeve 5 can be transferred to the wide-mouthed air induction plate 9, and then dispersed to the outside by the wide-mouthed air induction plate 9 through air cooling.

[0029] like Figure 3 , Figure 5 and Figure 7 As shown, the air outlet side of the wide-mouth air duct 9 is connected to an air duct 10, which extends and passes through the coolant tank 7. The coolant in the coolant tank 7 absorbs the heat of the heat pipe 6 to heat up, and the heat of the coolant in the coolant tank 7 is absorbed by the air duct 10, and the heated gas is discharged by the air duct 10.

[0030] Furthermore, the air duct 10 has a bending section, and the bending section is located in the coolant tank 7. The bending section bends and extends in the coolant tank 7, thereby increasing the contact area between the air duct 10 and the coolant in the coolant tank 7, which can increase the heat transferred from the air duct 10 to the coolant and improve the heat dissipation efficiency.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the coolant tank 7 is connected to the air cooling box 8, and the air cooling box 8 is provided with an exhaust window 11 connected to the outside; the air duct 10 extends and is connected to the air cooling box 8. The air duct 10 can flow air into the air cooling box 8 and finally discharge it through the exhaust window 11.

[0032] See also Figure 5 and Figure 7The cooling liquid tank 7 is connected with a heat dissipation water pipe 12 , which extends into the air-cooling box 8 , and the heat dissipation water pipe 12 can be cooled and cooled by the airflow gushing out of the air duct 10 .

[0033] In addition, a metal wire ball 13 is installed in the air cooling box 8, and the heat dissipation water pipe 12 is inserted into the metal wire ball 13. The metal wire ball 13 can improve the heat conduction medium. The metal wire ball 13 is in contact with the heat dissipation water pipe 12 to extract the heat in the coolant inside the heat dissipation water pipe 12. The porous structure of the metal wire ball 13 increases the contact area between the airflow conducted by the air duct 10 and the heat dissipation water pipe 12, and at the same time, the airflow is decelerated, thereby reducing the vibration and noise generated when the air duct 10 draws air.

[0034] like Figure 3 It is shown that a dustproof filter 14 is installed inside the opening of the wide-mouth air induction plate 9 , through which dirt can be blocked from entering the wide-mouth air induction plate 9 , thereby ensuring the cleanliness of the air duct. Also, see Figure 5 , filters can also be installed at the exhaust window 11 to prevent dust.

[0035] Furthermore, a mud guard 15 can be installed below the wide-mouth air ducting plate 9 in a suspended manner. The mud guard 15 can block mud and water splashed from the ground during driving, as well as stones and soil blocks that bounce up, which is beneficial to extending the service life of the heat conduction device.

[0036] like Figure 5 and Figure 7 As shown, the inner walls of the heat dissipation water pipe 12 and the heat pipe 6 are covered with sintered metal particles, wire mesh or directly opened with spiral grooves, so as to improve the wettability of the coolant and condensate on the inner walls of the heat dissipation water pipe 12 and the heat pipe 6, respectively, greatly enhance the capillary effect, and allow the coolant and condensate to quickly reflux, thereby accelerating the heat conduction process.

[0037] The power battery assembly and the vehicle described in this embodiment are respectively equipped with the thermal conduction device described in the above-mentioned embodiment, so they have the technical advantages of the thermal conduction device, and will not be described here.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat conduction device, characterized in that: include: Protective housing (1), heat conducting frame (3), heat storage plate (4), heat conducting metal sleeve (5) and heat pipe (6); The protective shell (1) is used to wrap the power battery body (2), the heat-conducting frame (3) is installed in the protective shell (1), and the heat-conducting frame (3) is connected to the power battery body (2); The heat storage disk (4) is connected to the heat conduction frame (3), and the bottom of the heat storage disk (4) is provided with the heat conduction metal sleeve (5) extending in the horizontal direction; Both ends of the heat pipe (6) are respectively provided with water drop-shaped end portions, and one end of the heat pipe (6) is inserted into the interior of the heat-conducting metal sleeve (5), while the other end extends to the exterior of the heat-conducting metal sleeve (5).

2. The heat conducting device according to claim 1, characterized in that: The heat conduction device further comprises: a coolant tank (7); One end of the heat pipe (6) extending to the outside of the heat-conducting metal sleeve (5) is inserted into the coolant tank (7).

3. The heat conducting device according to claim 2, characterized in that: The heat-conducting metal sleeve (5) is connected to a wide-mouth air induction plate (9).

4. The heat conducting device according to claim 3, characterized in that: An air guide duct (10) is connected to the air outlet side of the wide-mouth air guide plate (9), and the air guide duct (10) extends and passes through the coolant tank (7).

5. The heat conducting device according to claim 4, characterized in that: The air guide pipe (10) has a bent section, and the bent section is located inside the coolant tank (7).

6. The heat conducting device according to claim 4, characterized in that: The coolant tank (7) is connected to an air cooling box (8), and the air cooling box (8) is provided with an exhaust window (11) communicating with the outside; The air guide duct (10) extends and is connected to the air cooling box (8).

7. The heat conducting device according to claim 6, characterized in that: The coolant tank (7) is connected to a heat dissipation water pipe (12), and the heat dissipation water pipe (12) extends into the air cooling box (8).

8. The heat conducting device according to claim 7, characterized in that: A metal wire ball (13) is installed in the air cooling box (8), and the heat dissipation water pipe (12) is inserted into the interior of the metal wire ball (13).

9. The heat conducting device according to claim 3, characterized in that: A dust-proof filter (14) is installed inside the opening of the wide-mouth air induction plate (9).

10. The heat conducting device according to claim 3, characterized in that: A mud guard (15) is installed below the wide-mouth air induction plate (9).

11. A power battery assembly, characterized in that: The power battery assembly is equipped with the heat conduction device according to any one of claims 1-10.

12. A vehicle, characterized in that: The vehicle is equipped with the heat conduction device according to any one of claims 1-10.

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