Power supply unit with heat dissipation function

Abstract

The present invention discloses a power supply device with a heat dissipation function, which comprises a heat dissipation unit and a battery module with at least one single battery. Two heat dissipation units are provided and are respectively located on both sides of the battery module. The heat dissipation unit comprises a water cooling pipe and at least one heat dissipation component. The at least one heat dissipation component is sequentially sleeved on the water cooling pipe, and the at least one heat dissipation component is connected to at least one single battery in a one-to-one correspondence. In this way, the heat dissipation unit of the present invention can realize local rapid heat conduction of the battery module through the integrated arrangement of the water cooling pipe and the at least one heat dissipation component. At the same time, the distance between adjacent heat dissipation components can be adjusted according to the different sizes of the single batteries. The structure is simple and easy to install. In addition, the device can avoid the problem of battery short circuit while ensuring the heat dissipation effect through the cooperation of the water cooling pipe and the heat dissipation component, and has higher safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal control management of lithium-ion batteries, and in particular relates to a power supply device with a heat dissipation function. Background Art

[0002] During the high-rate charge and discharge process of lithium-ion batteries, the poles and the battery body will quickly generate a large amount of heat. When the battery cells are assembled into battery modules, the heat generated by each battery cell is superimposed on each other, directly leading to serious heat accumulation problems inside the battery module. At the same time, since the battery box has good sealing properties, the battery module in the box cannot exchange heat with the outside world in a timely and effective manner, which can easily lead to excessive temperature inside the box, thereby seriously affecting the electrochemical performance and cycle life of the battery. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a power supply device with a heat dissipation function.

[0004] The technical solution of the present invention is achieved in this way:

[0005] An embodiment of the present invention provides a power supply device with a heat dissipation function, which includes a heat dissipation unit and a battery module with at least one single battery. The heat dissipation units are provided with two and are respectively located on both sides of the battery module; the heat dissipation unit includes a water cooling pipe and at least one heat dissipation component, the at least one heat dissipation component is sequentially sleeved on the water cooling pipe, and the at least one heat dissipation component is connected to the at least one single battery in a one-to-one correspondence.

[0006] Preferably, the at least one heat dissipation component is slidably arranged along the water cooling tube to adjust the distance between two adjacent heat dissipation components according to the size of the single battery.

[0007] Preferably, the heat dissipation assembly includes a cooling element and a curved phase-change heat pipe, the cooling element is sleeved on a water-cooling pipe, the curved phase-change heat pipe extends into the cooling element along one side, extends circumferentially along the cooling element, and then extends out along the other side, the two ends of the curved phase-change heat pipe extending out of the cooling element are perpendicular to each other and are used to connect single cells.

[0008] Preferably, the cooling component includes a shell and a cover body, a first mounting hole matching the water cooling pipe is arranged at the center of the shell, an annular groove matching the bent phase change heat pipe is arranged around the first mounting hole, both ends of the annular groove are provided with inlets and outlets for passing the bent phase change heat pipe, and the cover body is provided with a second mounting hole matching the water cooling pipe.

[0009] Preferably, the curved phase-change heat pipe comprises a first connecting section, a curved section and a second connecting section connected in sequence, the curved section is matched with the annular groove of the cooling element, and the first connecting section and the second connecting section are respectively passed through the inlet and outlet at both ends of the annular groove for connecting single cells.

[0010] Preferably, the first connecting section of the curved phase-change heat pipe of the heat dissipation assembly is connected to the side wall of the single battery, and the second connecting section is connected to the pole of the single battery.

[0011] Preferably, the first connecting section and the second connecting section are perpendicular to each other.

[0012] Preferably, the heat dissipation assembly further comprises a thermally conductive insulating double-sided adhesive, and the thermally conductive insulating double-sided adhesive is arranged on the side surfaces of the first connecting section and the second connecting section for connecting the single battery.

[0013] Compared with the prior art, an embodiment of the present invention provides a power supply device with a heat dissipation function, which includes a heat dissipation unit and a battery module with at least one single battery cell, wherein two heat dissipation units are provided and are respectively located on both sides of the battery module; the heat dissipation unit includes a water cooling pipe and at least one heat dissipation component, wherein the at least one heat dissipation component is sequentially sleeved on the water cooling pipe, and the at least one heat dissipation component is connected to the at least one single battery cell in a one-to-one correspondence. In this way, the heat dissipation unit of the present invention can realize local rapid heat conduction of the battery module through the integrated arrangement of the water cooling pipe and the at least one heat dissipation component. At the same time, the distance between adjacent heat dissipation components can be adjusted according to the different sizes of the single batteries, and the structure is simple and easy to install. In addition, the device can avoid the problem of battery short circuit while ensuring the heat dissipation effect through the cooperation of the water cooling pipe and the heat dissipation component, and has higher safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a power supply device with heat dissipation function according to an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of the structure of a heat dissipation unit in a power supply device with heat dissipation function according to an embodiment of the present invention;

[0016] Figure 3 A schematic diagram of the structure of a heat dissipation component in a power supply device with heat dissipation function according to an embodiment of the present invention;

[0017] Figure 4 An exploded view of a heat dissipation component in a power supply device with heat dissipation function according to an embodiment of the present invention;

[0018] Figure 5 It is a schematic structural diagram of a cooling element in a power supply device with heat dissipation function according to an embodiment of the present invention;

[0019] Figure 6 It is a schematic structural diagram of a bent phase-change heat pipe in a power supply device with heat dissipation function according to an embodiment of the present invention;

[0020] Figure 7 A temperature distribution cloud diagram of a power supply device with heat dissipation function before heat dissipation according to an embodiment of the present invention;

[0021] Figure 8 This is a temperature distribution cloud diagram of a power supply device with heat dissipation function after heat dissipation according to an embodiment of the present invention.

[0022] The reference numerals are as follows:

[0023] 1——heat dissipation unit, 11——water cooling pipe, 12——heat dissipation assembly, 121——cooling element, 1211——housing, 1212——cover, 1213——first mounting hole, 1214——annular groove, 1215——inlet and outlet, 1216——second mounting hole, 122——bent phase change heat pipe, 1221——first connecting section, 1222——bent section, 1223——second connecting section, 123——thermal conductive insulating double-sided adhesive, 2——battery module, 21——monocell. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The embodiment of the present invention provides a power supply device with heat dissipation function and a heat dissipation unit structure, such as Figure 1 and 2 As shown, it includes a heat dissipation unit 1 and a battery module 2 having at least one single battery cell 21, wherein two heat dissipation units 1 are provided and are respectively located on both sides of the battery module 2; the heat dissipation unit 1 includes a water cooling pipe 11 and at least one heat dissipation component 12, wherein at least one heat dissipation component 12 is sequentially sleeved on the water cooling pipe 11, and at least one heat dissipation component 12 is connected one-to-one with at least one single battery cell 21.

[0026] At least one heat dissipation component 12 is slidably arranged along the water cooling tube 11 to adjust the distance between two adjacent heat dissipation components 12 according to the size of the single battery 21 .

[0027] The heat dissipation unit of the present invention can realize local rapid heat conduction of the battery module through the integrated arrangement of a water-cooling pipe and at least one heat dissipation component. At the same time, the distance between adjacent heat dissipation components can be adjusted according to the different sizes of the single cells. The structure is simple and easy to install. In addition, the device can avoid the problem of battery short circuit while ensuring the heat dissipation effect through the coordination of the water-cooling pipe and the heat dissipation component, and has higher safety and reliability.

[0028] Among them, the structural diagram and exploded view of the heat dissipation component are as follows: Figure 3 and 4 As shown, the heat dissipation assembly 12 includes a cooling member 121 and a curved phase-change heat pipe 122. The cooling member 121 is sleeved on the water-cooling pipe 11. The curved phase-change heat pipe 122 extends into the cooling member 121 along one side and extends along the circumferential direction of the cooling member 121 and then extends out along the other side. The two ends of the curved phase-change heat pipe 122 extending out of the cooling member 121 are perpendicular to each other and are used to connect the single battery 21.

[0029] There are several heat dissipation components 12, each of which includes a cooling member 121 and a curved phase-change heat pipe 122. The curved phase-change heat pipe 122 is used to connect each single battery in the battery module. The cooling member 121 is used to connect the curved phase-change heat pipe 122 and the water-cooling pipe 11, and the cooling member 121 and the curved phase-change heat pipe 122 are welded, so that the curved phase-change heat pipe 122 directly conducts the heat accumulated in the battery module to the cooling member 121, and directly guides it to the outside through the water-cooling pipe 11. The cooling member 121 and the curved phase-change heat pipe 122 are arranged in a one-to-one correspondence, and the water-cooling pipe 11 is directly connected to each curved phase-change heat pipe 122 through each cooling member 121, that is, the water-cooling pipe 11 can directly conduct the heat generated by each single battery 21 in the battery module 2, thereby further improving the heat dissipation efficiency. At the same time, it ensures the uniformity of heat dissipation of the battery module and extends the service life of the battery module.

[0030] The structure of the cooling element 121 is as follows: Figure 5 As shown, the cooling member 121 includes a shell 1211 and a cover 1212. The center of the shell 1211 is provided with a first mounting hole 1213 matching the water-cooling pipe 11. The shell 1211 is provided with an annular groove 1214 matching the curved phase-change heat pipe 122 around the first mounting hole 1213. Both ends of the annular groove 1214 are provided with an inlet and outlet 1215 for passing the curved phase-change heat pipe 122. The cover 1212 is provided with a second mounting hole 1216 matching the water-cooling pipe 11.

[0031] In order to facilitate the assembly of the cooling member 121 and the curved phase-change heat pipe 122, the cooling member 121 includes a shell 1211 and a cover 122. The center of the shell 1211 is a mounting hole 1213 for penetrating the water-cooling pipe 11. The shell 1211 has an annular groove 1214 around the mounting hole 1213. Since the two ends of the curved phase-change heat pipe 122 are used to connect the single battery, the annular groove 1214 is a semi-annular groove. The two ends of the annular groove 1214 form an inlet and outlet 1215 for penetrating the curved phase-change heat pipe 122. Since the heat dissipation device is used for square batteries, the two ends of the curved phase-change heat pipe 122 for connecting the single battery should be perpendicular to each other. Therefore, the angle between the inlet and outlet 1215 at the two ends of the annular groove 1214 is greater than 90°. In order to facilitate the assembly of the curved phase-change heat pipe 122, the cover 1212 is also provided with a second mounting hole 1216 for penetrating the water-cooling pipe 1.

[0032] The structure of the bent phase change heat pipe 122 is as follows: Figure 6 As shown, the curved phase-change heat pipe 122 includes a first connecting section 1221, a curved section 1222, and a second connecting section 1223 connected in sequence, the curved section 1222 is matched with the annular groove 1214 of the cooling member 121, and the first connecting section 1221 and the second connecting section 1223 are respectively passed through the inlet and outlet 1215 at both ends of the annular groove 1214 for connecting the single battery 21;

[0033] The curved phase-change heat pipe 122 includes a first connecting section 1221, a curved section 1222 and a second connecting section 1223 which are connected in sequence. The curved section 1222 is used to connect to the cooling member 121. The curved section 1222 is matched with the annular groove 1214 of the cooling member 121. The curved section 1222 of the curved phase-change heat pipe 122 is inserted into the annular groove 1214 of the cooling member 121 and is welded to the cooling member 121. The first connecting section 1221 and the second connecting section 1223 at both ends of the curved phase-change heat pipe 122 extend out of the cooling member 121. The first connecting section 1221 extends downward, and the second connecting section 1223 bends outward and extends a distance. The first connecting section 1221 and the second connecting section 1223 are perpendicular to each other, so that the first connecting section 1221 is connected to the side wall of the single cell 21, and the second connecting section 1223 is connected to the pole of the single cell 21.

[0034] The interior of the curved phase-change heat pipe 122 is a hollow structure, and a capillary porous material for liquid flow is arranged inside the curved phase-change heat pipe 122; when the curved phase-change heat pipe 122 is working, the second connecting section 1223 of the curved phase-change heat pipe 122 is connected to the pole of the single battery 21 and heated, and the liquid in the capillary porous material inside the second connecting section 1223 evaporates and vaporizes, and the steam flows to the first connecting section 1221 through the curved section 1222 under a small pressure difference, and releases heat in the first connecting section 1221 to condense into liquid, and the liquid then flows back to the second connecting section 1223 along the capillary porous material by the action of capillary force, and in this cycle, heat is transferred from one end of the curved phase-change heat pipe 122 to the other end, thereby achieving heat average and reducing the temperature of the connection with the pole, thereby solving the problem of heat accumulation inside the battery.

[0035] The heat dissipation assembly 12 further includes a thermally conductive insulating double-sided adhesive tape 123 , which is disposed on the side surfaces of the first connecting section 1221 and the second connecting section 1223 for connecting the single battery 21 .

[0036] The thermally conductive insulating double-sided adhesive tape 123 is mainly used for the tight connection between the heat dissipation assembly 12 and the single battery 21 , and has a simple structure and is easy to install.

[0037] The first connecting section 1221 of the curved phase-change heat pipe 122 is in close contact with the body of the single battery 21 via the thermally conductive insulating double-sided adhesive 123, thereby ensuring the thermal conductivity between the curved phase-change heat pipe 122 and the battery body 21; the second connecting section 1223 of the curved phase-change heat pipe 122 is in close contact with the pole part of the single battery 21 via the thermally conductive insulating double-sided adhesive 123, thereby preventing the battery module 2 from having a short circuit.

[0038] The invention is generally applicable to square battery modules. The assembly process of a power supply device with heat dissipation function provided by the invention is as follows: first, assemble the heat dissipation component 12, insert the bent section 1222 of the bent phase-change heat pipe 122 into the annular groove 1214 of the shell 1211 of the cooling member 121, and weld the bent phase-change heat pipe 122 and the shell 1211 of the cooling member 121 to ensure that the bent phase-change heat pipe 122 and the cooling member 121 are in good contact, and then the cover 1212 is buckled with the shell 1211, and the assembly of the heat dissipation component 12 is completed;

[0039] The assembled multiple heat dissipation components 12 are sleeved on the water cooling tube 11 along the first mounting hole 1213. Finally, the heat conductive insulating double-sided adhesive 123 is pasted on the side where the first connecting section 1221 and the second connecting section 1223 of the curved phase change heat pipe 122 are connected to the single battery, thus completing the assembly of the heat dissipation unit 1.

[0040] Finally, the heat dissipation unit 1 is connected to the battery module 2. Specifically, two heat dissipation units 1 are arranged in each battery module 2, and the two heat dissipation units 1 are symmetrically arranged along the battery module 2, and each heat dissipation component 12 is arranged in a one-to-one correspondence with each single battery 21 in the battery module 2; both ends of the water-cooling tube 11 are connected to the coolant storage tank to form a circulation loop, the cooling member 121 is tightly connected to the water-cooling tube 11, and the first connecting section 1221 of the curved phase-change heat pipe 122 is in close contact with the body of the single battery 21 through the thermal conductive insulating double-sided adhesive 123, thereby ensuring the thermal conductivity between the curved phase-change heat pipe 122 and the battery body 21, and the second connecting section 1223 of the curved phase-change heat pipe 122 is in close contact with the pole part of the single battery 21 through the thermal conductive insulating double-sided adhesive 123, thereby preventing the battery module 2 from having a short circuit problem, and the two heat dissipation components 12 used to connect the same single battery 21 are respectively close to the side walls on the front and rear sides of the single battery 21.

[0041] When dissipating heat from the battery module, the curved phase-change heat pipe 122 directly conducts the heat accumulated in the battery module to the cooling element 121, and directly guides it to the outside through the water-cooling pipe 11. The cooling element 121 and the curved phase-change heat pipe 122 are arranged in a one-to-one correspondence, and the water-cooling pipe 11 is directly connected to each curved phase-change heat pipe 122 through each cooling element 121, that is, the water-cooling pipe 11 can directly conduct the heat generated by each single battery 21 in the battery module, thereby further improving the heat dissipation efficiency. At the same time, it ensures the uniformity of heat dissipation of the battery module and extends the service life of the battery module.

[0042] The power supply device with heat dissipation function of the present invention adopts a lithium iron phosphate square aluminum shell battery module, and performs a simulation test on the temperature distribution of the power supply device before and after heat dissipation. Specifically, the single battery used in the battery module is a 60Ah lithium iron phosphate square aluminum shell battery single battery (internal resistance 0.6mΩ, thermal conductivity 57.25W / (m·K), specific heat capacity 1343.9J / (kg·K), density 1990kg / m3), and the single battery is connected in a four-parallel and three-series manner to form a battery module; the charge and discharge rate of the battery module is set to 2C; the main material of the curved phase change heat pipe is copper, and its thermal conductivity is set to 10000W / (m·K); the flow rate of the coolant in the water cooling pipe is set to 0.2m / s; the ambient temperature is set to 25°C;

[0043] The simulation results are as follows: the temperature distribution cloud diagram of the power supply device with heat dissipation function provided by this embodiment before and after heat dissipation, such as Figure 7 and 8As shown in the figure, the heat generated during the battery charging and discharging process is mainly concentrated in the middle part of the battery module. Since there is no additional heat dissipation device, the battery module has a serious heat accumulation problem. The maximum temperature of the battery is as high as 335.8K (62.8℃). After installing the heat dissipation unit, the maximum temperature of the battery module is reduced to 304.4K (31.4℃), and its cooling efficiency is correspondingly improved by 50%; in addition, the heat originally accumulated in the middle part of the battery module is transferred along the flow direction of the coolant, thereby effectively solving the heat accumulation problem of the battery module.

[0044] In summary, the heat dissipation unit of the present invention can achieve local rapid heat conduction of the battery module through the integrated arrangement of a water-cooling pipe and at least one heat dissipation component. At the same time, the distance between adjacent heat dissipation components can be adjusted according to the size of the single battery. The structure is simple and easy to install. In addition, the device can avoid the problem of battery short circuit while ensuring the heat dissipation effect through the cooperation of the water-cooling pipe and the heat dissipation component, and has higher safety and reliability.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A power supply device with heat dissipation function, characterized in that: It comprises a heat dissipation unit and a battery module having at least one single battery, wherein two heat dissipation units are provided and are respectively located on both sides of the battery module; the heat dissipation unit comprises a water cooling pipe and at least one heat dissipation component, wherein the at least one heat dissipation component is sequentially sleeved on the water cooling pipe, and the at least one heat dissipation component is connected to the at least one single battery in a one-to-one correspondence; The at least one heat dissipation component is slidably arranged along the water cooling tube to adjust the distance between two adjacent heat dissipation components according to the size of the single battery; The heat dissipation assembly includes a cooling element and a curved phase-change heat pipe, wherein the cooling element is sleeved on the water-cooling pipe, the curved phase-change heat pipe extends into the cooling element along one side, extends along the circumference of the cooling element, and then extends out along the other side, and the two ends of the curved phase-change heat pipe extending out of the cooling element are perpendicular to each other and are used to connect the single battery; The cooling element comprises a shell and a cover, wherein a first mounting hole matching the water cooling pipe is arranged at the center of the shell, an annular groove matching the curved phase-change heat pipe is arranged around the first mounting hole, an inlet and outlet for passing the curved phase-change heat pipe are arranged at both ends of the annular groove, and the cover is provided with a second mounting hole matching the water cooling pipe; The curved phase-change heat pipe comprises a first connecting section, a curved section and a second connecting section which are connected in sequence, the curved section is matched with the annular groove of the cooling element, and the first connecting section and the second connecting section are respectively passed through the inlet and outlet at both ends of the annular groove for connecting the single battery; The first connecting section of the curved phase-change heat pipe of the heat dissipation assembly is connected to the side wall of the single battery, and the second connecting section is connected to the pole of the single battery; The first connecting section and the second connecting section are perpendicular to each other; The interior of the curved phase-change heat pipe is a hollow structure, and a capillary porous material for liquid flow is arranged inside the curved phase-change heat pipe.

2. The power supply device with heat dissipation function according to claim 1, characterized in that: The heat dissipation assembly further comprises a heat-conducting insulating double-sided adhesive, and the heat-conducting insulating double-sided adhesive is arranged on the side surfaces of the first connecting section and the second connecting section for connecting the single battery.

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