TWI736813B - Battery - Google Patents

Abstract

A battery includes a first shell, a main body and a heat dissipation component. The battery is located in the first shell. The heat dissipation component and the main body are in thermal contact. The heat dissipation component includes a phase-change material and a water cooling tube. The phase-change material is located in the first shell. A portion of the water cooling tube is located in the first shell and embed in the phase-change material.

Description

Battery

The invention relates to a battery, in particular to a battery using phase change materials and liquid cooling tubes for heat dissipation.

Phase-change material (Phase-change material) is a substance with high latent heat, which means that the phase-change material can absorb a large amount of heat and still maintain a certain temperature when the state of the material changes. Such physical properties of phase change materials can be used in the field of battery heat dissipation. The solid phase change material is attached to the battery, and the heat generated by the battery can be absorbed before the phase change material is converted to liquid, thereby achieving heat dissipation of the battery. Function.

However, if the battery continues to generate heat after the solid phase change material has absorbed enough heat, the phase change material will begin to transform into a liquid state. The liquid phase change material may flow into the battery and be electrically connected to the battery, thereby reducing the power supply function of the battery, and may even destroy the internal structure of the battery and cause damage to the battery. Even if the liquid phase change material does not adversely affect the battery, the phase change material converted to a solid state may not return to its original shape, which reduces the efficiency of heat dissipation of the battery.

The present invention is to provide a battery, so as to solve the problem that the phase change material is easily converted into a liquid state in a battery that uses a phase change material to dissipate heat.

The battery disclosed in an embodiment of the present invention includes a first casing, a battery body, and a heat sink. The battery body is located in the first casing. The heat sink is in thermal contact with the battery body. The heat sink includes a phase change material and a liquid cooling tube. The phase change material is located in the first housing. A part of the liquid cooling tube is located in the first shell and embedded with the phase change material.

According to the battery disclosed in the above embodiment, the heat of the phase change material is absorbed by the part of the liquid cooling tube in contact with the phase change material, and then the heat is taken away from the battery body by the pipeline of the liquid cooling tube. In this way, heat will not be concentrated in the phase change material, which can avoid the problem of easy conversion of the phase change material into a liquid state.

The above description of the content of the present invention and the description of the following embodiments are used to demonstrate and explain the principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention.

An embodiment of the present invention will be described below. First, please refer to FIG. 1 to FIG. 2. FIG. 1 is a three-dimensional schematic diagram of a battery drawn according to an embodiment of the present invention. Fig. 2 is an exploded schematic diagram of the battery of Fig. 1.

The battery 10 of this embodiment includes a first casing 100, a battery body 200 and a heat sink 300. The battery body 200 is located in the first housing 100. The heat sink 300 thermally contacts the battery body 200. The so-called thermal contact means heat transfer between two objects. The heat transfer method can be heat conduction, heat convection or heat radiation. Take this as an example, that is, the heat sink 300 and the battery body 200 can be directly or indirectly contacted for heat conduction, or the two can be separated from each other for heat radiation, or the two can be used to conduct heat to the fluid and then use the fluid for heat conduction. Heat convection. The thermal contact mentioned below includes one of the heat transfer methods, so the definition of the thermal contact described below will be omitted. The heat sink 300 includes a phase-change material 310 and a liquid cooling tube 320. The phase change material 310 is, for example, a composite material whose main component is paraffin wax and is located in the first housing 100. A part of the liquid cooling tube 320 is located in the first housing 100 and embedded with the phase change material 310.

In detail, in this embodiment and some embodiments of the present invention, the battery 10 may further include an electrode 400 and a first heat conducting member 500. A part of the electrode 400 protrudes from the first casing 100 and is electrically connected to the battery body 200. The battery body 200 can be electrically connected to an external device (not shown in the figure) through the electrode 400 and provide power to the external device. The first heat conducting member 500 is located in the first casing 100 and covers the opposite sides of the battery body 200, but is not limited to this. In some embodiments, the first heat-conducting member can also cover the periphery of the battery body or completely cover the battery body. In this embodiment and some embodiments of the present invention, the first heat conducting member 500 is, for example, an electrical insulating material of Silicone, so as to avoid being electrically connected to the battery body 200 and affecting the power supply performance of the battery 10. The thermal conductivity of the first heat-conducting member 500 is greater than the thermal conductivity of the battery body 200, so the first heat-conducting member 500 can quickly transfer the heat generated by the battery body 200. The heat dissipating member 300 covers the opposite sides of the first heat conducting member 500 and can thermally contact the battery body 200 through the first heat conducting member 500, and utilizes the physical properties of the phase change material 310 with high latent heat to absorb a large amount of heat transferred to the first heat conducting member 500 .

In this embodiment and some embodiments of the present invention, the liquid cooling tube 320 may further include an input end 321, an output end 322, and an intermediate section 323. The input terminal 321 and the output terminal 322 both protrude from the first housing 100 and are respectively connected to opposite sides of the middle section 323. The middle section 323 is located in the first housing 100. The middle section 323 is completely embedded in the phase change material 310 to use a larger contact area to conduct heat conduction with the phase change material 310, but it is not limited to this. In some embodiments, the intermediate section may only partially embed the phase change material. In this embodiment and some embodiments of the present invention, the liquid cooling liquid (not shown in the figure) can flow into the liquid cooling tube 320 through the input end 321, flow through the middle section 323 and absorb the heat of the phase change material 310, and finally from The output end 322 flows out and takes the heat away to achieve the effect of heat dissipation.

Then please refer to Figure 3. FIG. 3 is an exploded schematic diagram of a battery drawn according to another embodiment of the present invention. The following only describes the differences between another embodiment of the present invention and some of the foregoing embodiments, and the remaining similarities will be omitted. In this embodiment and some embodiments of the present invention, the battery 10 may further include a second casing 600a. The second housing 600a is located in the first housing 100, which means that the battery 10 is a structure with an inner and outer shell. The battery body 200 and the first heat conducting member 500 are both located in the second housing 600a. The heat dissipation member 300 is sandwiched between the first housing 100 and the second housing 600a and thermally contacts the battery body 200 through the second housing 600a and the first heat conducting member 500 to absorb the heat of the battery body 200. Once the phase change material 310 absorbs excessive heat and converts to a liquid state, the second casing 600a can prevent the liquid phase change material 310 from flowing into the second casing 600a, so as to avoid adverse effects on the battery body 200.

Then please refer to Figure 4. FIG. 4 is a three-dimensional schematic diagram of a battery drawn according to still another embodiment of the present invention. The following will only describe the differences between another embodiment of the present invention and some of the foregoing embodiments, and the remaining similarities will be omitted. In this embodiment and some embodiments of the present invention, the battery 10 may further include a waterproof glue 700b. The first shell 100 is riveted to the second shell 600b, and the waterproof glue 700b fills the riveted joint between the first shell 100 and the second shell 600b. In this way, the liquid can be prevented from flowing into the second housing 600b.

Then refer to Figure 5. FIG. 5 is an exploded schematic diagram of a battery drawn according to another embodiment of the present invention. The following only describes the differences between another embodiment of the present invention and some of the foregoing embodiments, and the remaining similarities will be omitted. In this embodiment and some embodiments of the present invention, the battery 10 may further include a metal member 800c, where the metal member 800c is, for example, an aluminum plate. The metal piece 800c thermally contacts the heat sink 300 and is located between the heat sink 300 and the second housing 600c. The heat dissipating member 300 can absorb the heat of the battery body 200 by thermally contacting the battery body 200 through the metal member 800c, the second housing 600c, and the first heat conducting member 500. The metal member 800c is provided to facilitate the installation of the heat dissipation member 300. In detail, the first housing 100 and the metal piece 800c can be used to isolate the space where the heat sink 300 is to be placed, and then the liquid phase change material 310 is poured into the space between the first housing 100 and the metal piece 800c and put in the liquid The cooling pipe 320 completes the arrangement of the heat sink 300 after the phase change material 310 is cooled and solidified, and finally the second housing 600c and the battery body 200 are arranged in the first housing 100 together. In other embodiments, the battery may also have no metal parts, and the liquid cooling tube of the heat dissipating part may be embedded in the phase change material outside the battery first, and then the heat dissipating part, the second casing and the battery body are arranged in the first casing together .

Then please refer to Figure 6. FIG. 6 is an exploded schematic diagram of the battery body according to another embodiment of the present invention. The following only describes the differences between another embodiment of the present invention and some of the foregoing embodiments, and the remaining similarities will be omitted. In this embodiment and some embodiments of the present invention, the battery body 200d may further include a plurality of sheet-shaped monomers 210d and a plurality of second heat conducting members 220d. The second heat-conducting member 220d is, for example, an electrical insulating material of Silicone, so as to avoid electrical connection with the battery body 200d. The thermal conductivity of the second heat conducting member 220d is greater than the thermal conductivity of the sheet-shaped monomer 210d. The second heat conducting members 220d thermally contact the sheet-shaped monomers 210d, respectively. Each sheet-shaped monomer 210d is separated by each second heat-conducting element 220d, which means that each second heat-conducting element 220d is sandwiched between every two adjacent sheet-shaped monomers 210d. The structure of these closely-arranged sheet-shaped cells 210d can improve the power supply efficiency of the battery body 200, and the second heat-conducting member 220d can transfer the heat generated by the sheet-shaped cells 210d to avoid excessive temperature of the sheet-shaped cells 210d. In some embodiments, each sheet-shaped monomer can be separated by two second heat-conducting elements, and a heat-dissipating element of the aforementioned structure is arranged between the two second heat-conducting elements, and the high latent heat of the phase change material is also used. Physical characteristics to dissipate heat from the chip-shaped monomer.

Then please refer to Figure 7. FIG. 7 is a schematic top cross-sectional view of a battery drawn according to another embodiment of the present invention. The following only describes the differences between another embodiment of the present invention and some of the foregoing embodiments, and the remaining similarities will be omitted. In this embodiment and some embodiments of the present invention, the battery body 200e may further include a plurality of columnar monomers 230e. Each columnar monomer 230e is connected to the first housing 100e by welding one end, for example. The first heat-conducting member 500e covers the columnar monomer 230e, and the phase change material 310e is filled between the columnar monomers 230e to thermally contact the columnar monomer 230e through the first heat-conducting member 500e. The first heat conducting member 500e is located between the columnar monomer 230e and the phase change material 310e to prevent the columnar monomer 230e from being electrically connected to the phase change material 310e. In addition, since the columnar monomer 230e is connected to the first housing 100e, the columnar monomer 230e can still maintain support even after the phase change material 310e is converted into a liquid state. After the phase change material 310e absorbs the heat of the columnar monomer 230e, the heat will be transferred to the liquid cooling tube 320e and taken away by the liquid cooling liquid (not shown) in the aforementioned manner. The liquid cooling tube 320e is, for example, located on opposite sides of the battery body 200e, which means that only the phase change material 310e is covered between the columnar monomers 230e. In this way, the columnar monomers 230e can be arranged densely to make full use of the space, but it is not limited to this. In other embodiments, the liquid cooling tube can also pass between the columnar monomers to take away the heat of the columnar monomers.

Then refer to Figure 8. FIG. 8 is a three-dimensional schematic diagram of a battery drawn according to another embodiment of the present invention. The following only describes the differences between another embodiment of the present invention and some of the foregoing embodiments, and the remaining similarities will be omitted. In this embodiment and some embodiments of the present invention, the battery 10f may further include an insulating member 900f. The insulating member 900f is, for example, an electrical insulating material of Silicone. The insulating member 900f is located in the first housing 100f and between the electrode 400f and the heat dissipation member 300f, so as to prevent the electrode 400f from being electrically connected to the heat dissipation member 300f, so as to maintain the power supply performance of the battery 10f.

According to the battery of the above embodiment, the first heat-conducting member can quickly transfer the heat generated by the battery body. The heat dissipation element covers the opposite sides of the first heat conduction element, and utilizes the physical properties of the phase change material with high latent heat to absorb a large amount of heat transferred to the first heat conduction element. The liquid cooling liquid can flow into the liquid cooling tube through the input end, flow through the middle section and absorb the heat of the phase change material, and finally flow out from the output end and take the heat away to achieve the effect of heat dissipation.

In some embodiments, the heat sink is sandwiched between the first casing and the second casing to absorb heat from the battery body. Once the phase change material absorbs too much heat and converts to a liquid state, the second casing can prevent the liquid phase change material from flowing into the second casing, so as to avoid adverse effects on the battery body.

In some embodiments, the battery may further include a waterproof glue. The waterproof glue fills the riveting joint between the first shell and the second shell. In this way, the liquid can be prevented from flowing into the second housing.

In some embodiments, the battery may further include a metal member to facilitate the installation of the heat dissipation member. In detail, the space between the first shell and the metal part is used to isolate the heat sink, and then the liquid phase change material is poured into the space between the first shell and the metal part and put into the liquid cooling tube. After the phase change material is cooled and solidified The setting of the heat sink is completed.

In some embodiments, the battery body may further include a plurality of sheet-shaped cells and a plurality of second heat conducting elements. The densely arranged sheet-shaped monomer structure can improve the power supply efficiency of the battery body, and the second heat-conducting member can transfer the heat generated by the sheet-shaped monomer to avoid the temperature of the sheet-shaped monomer from being too high.

In some embodiments, the battery body may further include a plurality of cylindrical cells. The first heat-conducting member covers the columnar monomers, and the phase-change material is filled between the columnar monomers to thermally contact the columnar monomers through the first heat-conducting member. When the phase change material absorbs the heat of the columnar monomer, the heat will be transferred to the liquid cooling tube and taken away by the liquid cooling liquid. The liquid cooling tubes are located on opposite sides of the battery body, which means that the columnar cells are only covered with phase change materials. In this way, the columnar monomers can be arranged densely to make full use of space.

In some embodiments, the battery may further include an insulating member. The insulating member is interposed between the electrode and the heat dissipating member to avoid electrical connection between the electrode and the heat dissipating member to maintain the power supply efficiency of the electrode.

Although the present invention is disclosed in the foregoing embodiments as above, it is not intended to limit the present invention. Anyone familiar with similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of patent protection for inventions shall be determined by the scope of patent applications attached to this specification.

10.10f: battery 100, 100e, 100f: first housing 200, 200d, 200e: battery body 210d: sheet-shaped monomer 220d: second heat conducting member 230e: columnar monomer 300, 300f: heat sink 310, 310e : Phase change material 320, 320e: Liquid cooling tube 321: Input end 322: Output end 323: Intermediate section 400, 400f: Electrode 500, 500e: First heat conducting element 600a, 600b, 600c: Second housing 700b: Waterproof glue 800c: metal parts 900f: insulating parts

FIG. 1 is a three-dimensional schematic diagram of a battery drawn according to an embodiment of the present invention. Fig. 2 is an exploded schematic diagram of the battery of Fig. 1. FIG. 3 is an exploded schematic diagram of a battery drawn according to another embodiment of the present invention. FIG. 4 is a three-dimensional schematic diagram of a battery drawn according to still another embodiment of the present invention. FIG. 5 is an exploded schematic diagram of a battery drawn according to another embodiment of the present invention. FIG. 6 is an exploded schematic diagram of the battery body according to another embodiment of the present invention. FIG. 7 is a schematic top cross-sectional view of a battery drawn according to another embodiment of the present invention. FIG. 8 is a three-dimensional schematic diagram of a battery drawn according to another embodiment of the present invention.

10: battery

100: first shell

200: The battery body

300: heat sink

310: Phase Change Material

320: Liquid cooling tube

321: Input

322: output

323: middle section

400: Electrode

500: The first heat conduction piece

Claims (9)

A battery includes: a first housing; a second housing located in the first housing; a battery body located in the second housing, the battery body containing a plurality of battery cells; a heat sink, heat In contact with the battery body, the heat sink includes two phase-change materials (Phase-change materials) and two liquid-cooling tubes. The two phase-change materials are respectively sandwiched between the first shell and the second shell, and the two Part of the liquid cooling tube is located in the first casing and embedded in the two phase change materials, all the battery cells are located between the two liquid cooling tubes; and an electrode, part of the electrode protruding from the The first casing is electrically connected to the battery body, and the electrode and the two phase change materials are respectively located on three different sides of the battery cells. The battery described in item 1 of the scope of patent application further includes a first heat-conducting member located in the second casing and covering the battery body, the first heat-conducting member is an insulating material, and the first heat-conducting member is an insulating material. The thermal conductivity of a heat-conducting element is greater than the thermal conductivity of the battery body, the heat-dissipating element covers the second shell and thermally contacts the battery body with the first heat-conducting element through the second shell, the two liquid cooling tubes Each of them further includes an input end, an output end, and a middle section. The input end and the output end protrude from the first housing and are respectively connected to opposite sides of the middle section. The middle section is located at the In the first shell, a portion of each of the intermediate sections is embedded in each of the two phase change materials. For example, the battery described in item 2 of the scope of patent application further includes a metal member that thermally contacts the heat dissipation member and is located between the heat dissipation member and the second housing, and the heat dissipation member penetrates the metal member and the second housing. The second shell and the first heat-conducting member are in thermal contact with the battery body. The battery described in item 2 of the scope of patent application, wherein the battery cells are a plurality of sheet-shaped cells, the battery body further includes a plurality of second heat-conducting members, the second heat-conducting members are an insulating material, the The thermal conductivity of the second heat-conducting elements is greater than the thermal conductivity of the sheet-shaped monomers, the second heat-conducting elements are in thermal contact with the sheet-shaped monomers, and each of the second heat-conducting elements is sandwiched between the sheets形 Between monomers. The battery described in item 2 of the scope of patent application further includes a waterproof glue, the first shell is riveted to the second shell, and the waterproof glue fills the space between the first shell and the second shell The riveting joint. The battery described in item 2 of the scope of patent application, wherein the first heat-conducting member is Silicone. For the battery described in item 4 of the scope of patent application, the two liquid cooling tubes are respectively located on opposite sides of the normal axis of the sheet-shaped monomers. The battery described in item 4 of the scope of patent application, wherein the two phase change materials are respectively located on opposite sides of the normal axis of the sheet-shaped monomers. As described in item 4 of the scope of patent application, the battery further includes two metal parts, the two metal parts are respectively located on opposite sides of the normal axis of the sheet-shaped monomers and located between the heat sink and the second housing Meanwhile, the two metal parts are in thermal contact with the heat dissipating part, and the heat dissipating part is in thermal contact with the battery body through the two metal parts, the second housing and the first heat conducting part.

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