CN207303167U - A kind of anhydrous rapid cooling battery case - Google Patents

Abstract

It the utility model is related to a kind of anhydrous rapid cooling battery case, the battery case is closed, meet the requirement of cell sealing, waterproof, the plate-type heat-pipe that can be transmitted to heat inside and outside babinet is equipped with Battery case, a part for heat pipe is placed in box house, and another part is placed in outside babinet, and multiple microchannels are set in plate-type heat-pipe, by vacuumizing sealing, the working medium of phase-change heat transfer effect has been inoculated with.The evaporation ends or condensation end of the plate-type heat-pipe post radiating fin or coldplate or heating element, form heat pipe assembly.This anhydrous rapid cooling battery case, both can promptly by battery work caused by heat lead outside battery case and scatter away heat, battery can also be heated when needed, it can not only keep the uniform temperature between single battery, and within the scope of the temperature of battery pack can be maintained reasonably, the security and service life of battery pack are improved, and the weight of battery pack can be mitigated, improves the energy density of battery pack.

Description

A waterless fast cooling battery box

technical field

The utility model relates to the field of heat management of electric vehicle batteries, in particular to a waterless fast cooling battery box.

Background technique

In order to ensure the safety of the battery, the national standard puts forward higher sealing and waterproof requirements for the battery box. How to conduct thermal management of the battery pack when the battery box is airtight, there are many difficult problems to be solved, and the heat dissipation of the battery in the airtight battery box It is a difficult problem currently plaguing the new energy automobile industry. On the other hand, in order to improve the energy density of the electric vehicle power battery pack, improve the quality of the battery, and prolong the life of the battery, rationally performing battery thermal management is also one of the urgent problems to be solved in the electric vehicle industry.

Contents of the invention

The purpose of the utility model is to provide a waterless fast cooling battery box with fast heat dissipation at high temperature, fast heating at low temperature, easy temperature control, good heat uniformity, light weight and high energy density. Heat element, simple structure, safe and reliable, economical and practical.

The technical solution of the utility model is a waterless fast cooling battery box, which is characterized in that the battery box is formed by an upper cover, a side wall and a base to form an airtight battery box body, which meets the requirements of battery sealing and waterproof, and the battery is placed In the enclosed space, a plate heat pipe is placed on the battery box to transfer heat inside and outside the box. A part of the heat pipe is placed inside the box, and the other part of the heat pipe is placed outside the box. Inside the plate heat pipe A plurality of microchannels are set up, sealed by vacuuming, and filled with a working medium that plays a role of phase change and heat transfer.

The utility model is further described below.

The evaporating end or the condensing end of the heat pipe placed on the box body is pasted with cooling fins or cooling plates or heating elements to form a heat pipe assembly. The heating element is an electric heating film, an electric heating plate or a heating plate through which a heat medium flows. When the heat pipe is bonded to the heat dissipation fins, cooling plate, heating element or battery, substances with heat conduction and insulation functions, such as heat conduction glue, are added to the bonding surface.

The part of the heat pipe in the box is placed next to the battery pack or bonded to the battery or the internal heat pipe, and the part of the heat pipe outside the box is bonded to the cooling fins or the cooling plate.

An internal heat pipe is placed in the battery box to be attached to the battery, and conduct heat to the box body or outside the box body.

The heat pipe attached to the battery can be bent into a U-shape, the battery is placed at the bottom of the U-shape, and the two ends of the U-shape are connected to the box body or the heat pipes on the box body.

The heat pipe is in the shape of a straight line, a U shape, an L shape, an inverted L shape, a square shape, a square shape with an opening, a groove shape, a wave shape, a rectangle or a parallelogram.

One or more fans can be placed in the battery box to form air convection in the battery pack to achieve uniform temperature among the single batteries.

The radiating fins or cooling plates or heating elements attached to the heat pipes can be integrally formed with the heat pipes, or can be connected by welding or gluing.

The heat pipes are plate heat pipes, circular heat pipes, special-shaped heat pipes, copper heat pipes, aluminum heat pipes, stainless steel heat pipes or composite material heat pipes, gravity heat pipes, pulsation heat pipes or anti-gravity heat pipes.

The battery box body includes an upper cover, a side wall and a bottom plate, which can be made of metal or non-metal respectively, and heat pipes or heat pipe assemblies can be placed on the upper cover, side walls and bottom plate, and there can be one or more than one heat pipe assembly on each surface. Heat pipe or heat pipe assembly, and can be made into a modular structure for easy splicing.

The battery includes a battery pack and a single cell. The battery pack is composed of a plurality of single cells.

The waterless quick-cooling battery box uses heat pipes as the key heat-conducting elements of the battery, and its working principle is: when the battery is dissipated, the heat of the battery is transferred to the part of the plate heat pipe placed inside the box through the internal heat pipe or air duct , the working medium in the plate heat pipe is heated and evaporated, and the heat is quickly transferred to the part of the plate heat pipe outside the box, and then transferred to the cooling plate or fins that are closely attached to the plate heat pipe to efficiently dissipate the heat. The whole heat dissipation process in the box is carried out spontaneously; when the battery is heated, the heat is directly transferred to the battery through the heating element, or the heat generated by the heating element is transferred to the evaporation end of the plate heat pipe outside the battery box. The condensing end of the internal plate heat pipe transfers heat to the inner fins, and then transfers the heat to the battery through the fan circulation. Through efficient heat dissipation and heating, the temperature of the battery pack is controlled within an appropriate range, and good temperature uniformity of the battery pack is ensured.

It can be seen from the above that the utility model is a waterless fast cooling battery box, and its positive effects are as follows:

(1) Since the plate-type heat pipe is inserted into the battery box, the heat transfer efficiency is greatly increased by using its high-efficiency heat conduction characteristics, and the heat of the battery can be quickly and effectively exported, which can effectively reduce the maximum temperature of the battery pack and reduce the battery temperature. Control within a reasonable range and keep the temperature difference between the batteries small enough, which significantly improves the consistency of the temperature field of the battery pack.

(2) This heat dissipation method makes the battery box free of water and dust, safe and reliable, and simple in structure, avoiding the complexity and potential safety hazards caused by the liquid flowing in the battery box in the general liquid cooling method.

(3) The ratio of the part of the plate heat pipe protruding from the box and the part placed in the box can be adjusted as needed, so that the heat flux density of heat transfer at both ends of the heat pipe can be changed, and the temperature of the tube wall of the heat pipe can be adjusted within a suitable range.

(4) Since the plate heat pipe adopted can separate the heat source and the cold source in two places for heat exchange, so that the heat dissipation of the battery can realize water-free partition contact, and can conveniently realize multi-layer insulation isolation of electricity, and can also Realize the long-distance transmission of heat in narrow spaces.

(5) The structure of the heating system and cooling system is simplified, and the plate-type heat pipe (usually an aluminum casing) as a heat-conducting material is very light in weight, which greatly reduces the weight of the battery pack and is conducive to improving the energy density of the battery.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of the utility model.

Fig. 2 is a schematic diagram of an embodiment of the utility model with internal air cooling and external water cooling.

Fig. 3 is a schematic diagram of an embodiment of the utility model in which both the inside and the outside are air-cooled.

Fig. 4 is an enlarged scratched view of I in Fig. 2 .

Figure 5 is an enlarged scratched view of II in Figure 2 .

In the picture:

1—plate heat pipe, 2—sealing port, 3—side wall,

4—battery, 5—top cover, 6—base,

7—outer fins, 8—inner fins, 9—heating element,

10—cooling plate, 11—fan, 12—air duct,

13—internal heat pipe, 14—screw, 15—runner.

Detailed ways:

In order to better understand the waterless quick cooling battery box of the utility model, the utility model will be further described in detail below in conjunction with the examples, but the scope of protection claimed by the utility model is not limited to the range indicated by the examples.

Example 1: As shown in Figure 1, a waterless quick-cooling battery box is shown, which is mainly composed of a heat pipe 1, a sealing port 2, a side wall 3, a battery 4, an upper cover 5 and a base 6. The side wall 3, the upper cover 5 and the base 6 form the battery box. The battery box is a dustproof and waterproof airtight structure. The side wall 3 is placed with a plate heat pipe 1. A part of the heat pipe is attached to the inside of the box, and the other part of the heat pipe is attached to the inside of the box. Closed to the outside of the box, the plate heat pipe is provided with a plurality of microchannels, which are sealed by vacuuming and filled with a working medium that plays a role of phase change heat transfer. There is an internal heat pipe 13 inside the battery box, and the internal heat pipe 13 is bent into a U shape. The battery 4 is placed on the bottom edge of the U shape of the internal heat pipe 13. There is a heating element 9 . When cooling the battery, the heat of the battery is transferred to the U-shaped bottom of the internal heat pipe 13, and the heat is quickly transferred to the two ends of the U-shaped internal heat pipe 13, and then the heat is transferred to the plate heat pipe 1, and the plate heat pipe 1 working medium Evaporate, quickly and spontaneously transfer heat to its condensing end, and transfer the heat to the cooling plate 10 outside the box, thereby dissipating the heat of the battery 4, controlling the temperature within an appropriate range, and ensuring good temperature uniformity of the battery 4 sex. When heating the battery, close the valve connected to the cooling plate 10, open the heating element 9, and transfer the heat to the battery 4, thereby heating the battery 4 to the required temperature. Sealing can make the place where the heat pipe is inserted get well sealed.

Embodiment 2: As shown in Figure 2, in this embodiment, the upper end and the lower end of the plate heat pipe 1 are placed on the outside of the side wall 3 of the battery box, and are connected to the cooling plate 10 and the heating element 9 respectively; It is placed inside the side wall 3 of the battery box and attached to the inner fins 8 . A fan 11 is arranged in the battery box, and the air in the battery box is circulated through the air duct 12, so that the heat of the battery box is evenly distributed. When the battery dissipates heat, the heat of the battery 4 is transferred to the inner fin 8 through the hot air, and the part where the plate heat pipe 1 and the inner fin 8 are bonded becomes the evaporation end, and the internal working medium evaporates and quickly transfers the heat to the upper end of the plate heat pipe 1. The combined cooling plate 10, the part where the plate heat pipe 1 and the cooling plate 10 are attached becomes the condensation end, and the cooling plate takes away the heat; when the battery is heated, the heat of the heating element 9 is transferred to the inner fin 8 through the plate heat pipe 1, At this time, the part where the plate heat pipe 1 is attached to the heating element 9 is the evaporation end, and the part where the plate heat pipe 1 is attached to the inner fin 8 is the condensation end. The battery in this embodiment is a cylindrical battery. Other structures and working principles of this embodiment are the same as those of Embodiment 1.

Embodiment 3: As shown in Figure 3, on the outside of the side wall 3 of the battery box, the outer fins 7 are connected to the plate heat pipe 1, and the external heat is dissipated by air cooling. Other structures and working principles of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

Embodiment 4: As shown in Figure 4, this figure is an enlarged scraped view of I in Figure 2, showing the sealing details of the cooling plate 10 attached to the outside of the battery box, the upper end of the plate heat pipe 1 is attached to the outside of the side wall 3, The middle or lower end of the plate heat pipe 1 is attached to the inner side of the side wall 3, the screw 14 tightly connects the cooling plate 10 and the side wall 3, a sealing strip is placed in the sealing port 2, and the battery box is sealed, and the cooling plate 10 and the plate heat pipe 1 fit, the heat is taken away by the cooling medium in the flow channel 15. This structure can not only efficiently take away the heat of the battery, but also isolate the battery box from water. Other structures and working principles of this embodiment are the same as those of Embodiment 2.

Embodiment 5: As shown in Figure 5, this figure is an enlarged scraped view of II in Figure 2, showing the sealing details of the heating element 9 attached to the battery box. The heating element 9 in this embodiment is a heating plate with a flow channel 15 inside. Other structures and working principles of this embodiment are the same as Embodiment 2 and Embodiment 4.

Claims (7)

1. An anhydrous fast cooling battery box, characterized in that the battery box is formed by an upper cover, a side wall and a base to form an airtight battery box, which meets the requirements of battery sealing and waterproofing, and the battery is placed in the airtight space , a plate heat pipe is installed on the battery box to transfer heat inside and outside the box, a part of the heat pipe is attached to the inside of the box, and the other part of the heat pipe is attached to the outside of the box, and a plurality of microchannels are arranged inside the plate heat pipe , through vacuum sealing, filled with the working medium that plays the role of phase change heat transfer. 2. The waterless fast cooling battery box according to claim 1, characterized in that, the evaporating end or the condensing end of the heat pipe placed on the box body is pasted with cooling fins or cooling plates or heating elements to form a heat pipe assembly . 3. The waterless quick cooling battery box according to claim 1, characterized in that the part of the heat pipe in the box is placed next to the battery pack or attached to the battery or attached to the internal heat pipe, and the heat pipe is placed in the box The outer part is attached to the cooling fin or the cooling plate. 4. The waterless quick-cooling battery box according to claim 1, characterized in that an internal heat pipe is placed in the battery box to fit the battery, and conduct heat to the box body or outside the box body. 5. A waterless quick-cooling battery box according to claim 4, wherein the internal heat pipe placed in the battery box is bent into a U-shape, the battery is placed at the bottom of the U-shape, and the two ends of the U-shape are connected to the box body Or connected to the heat pipe on the box. 6. A waterless quick-cooling battery box according to claim 1 or claim 4, wherein the heat pipe is in the shape of a straight line, a U shape, an L shape, a reverse L shape, a square shape, an open square shape, Trough, wavy, rectangular or parallelogram. 7. The waterless fast cooling battery box according to claim 1, characterized in that one or more fans are placed in the battery box to form air convection in the battery pack to achieve uniformity between the single batteries. temperature.