Lithium iron phosphate battery pack device convenient for heat dissipation

Abstract

The utility model discloses a lithium iron phosphate battery pack device convenient for heat dissipation, which belongs to the field of lithium iron phosphate batteries, and comprises a battery pack body consisting of a plurality of lithium iron phosphate battery bodies, a heat dissipation mechanism is arranged outside the battery pack body, and the arranged heat dissipation mechanism is matched with the battery pack body for use. Before the battery pack body is used, single lithium phosphate battery bodies can be placed between the adjacent partition plates in the first cavity, the multiple lithium phosphate battery bodies can be separated through the partition plates, mutual heat transfer and temperature rise caused by mutual contact of the lithium phosphate battery bodies are avoided, and heat dissipation efficiency is improved through cooperation with the cooling fins on the two sides in the first cavity. The heat in the lithium phosphate battery body can be quickly conducted out according to the material structural characteristics of the cooling fins, and the battery pack body is cooled by air cooling and water cooling, so that the purpose of improving the heat dissipation effect and heat dissipation efficiency of the battery pack body can be achieved, and the normal use of the battery pack body is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of lithium iron phosphate batteries, and in particular to a lithium iron phosphate battery pack device that facilitates heat dissipation. Background Technology

[0002] Lithium iron phosphate (LFP) batteries are lithium-ion batteries that use lithium iron phosphate (LiFePO4) as the positive electrode material and carbon materials as the negative electrode material. They are renowned for their high safety, long lifespan, high-temperature resistance, good thermal stability, and environmental friendliness. During charging and discharging, lithium ions move back and forth between the positive and negative electrodes, storing and releasing electrical energy. These batteries are widely used in electric vehicles, energy storage systems, energy storage devices in solar and wind power plants, and various portable electronic devices, making them a crucial component of modern new energy technologies.

[0003] In the prior art, Chinese utility model patent with publication number "CN214203837U" discloses "a lithium iron phosphate battery pack device for easy heat dissipation". The patent describes the following technical solutions: "including a base plate, on which multiple batteries are fixedly connected at equal intervals, with gaps between adjacent batteries, a ventilation channel is opened through the base plate, a fan is fixedly connected to the base plate, a duct is connected to the air outlet of the fan, one end of the duct is connected to the ventilation channel, a sealing plug is threaded to the other end of the ventilation channel, a sealing ring abuts between the sealing plug and the ventilation channel, and ventilation holes are opened on the bottom wall of the multiple gaps, which are connected to the ventilation channel".

[0004] Although the design of gaps, ventilation holes, fans, and air ducts avoids contact between batteries, which helps to dissipate the heat of the battery pack and ensure the normal operation of the batteries, this technical solution can only achieve passive heat dissipation for lithium iron phosphate battery packs, but cannot actively dissipate heat for lithium iron phosphate battery packs. It is difficult to quickly remove heat from the lithium iron phosphate battery pack and cool it down, thus reducing the heat dissipation effect and efficiency of the lithium iron phosphate battery pack.

[0005] Therefore, in order to solve the above-mentioned technical problems, this utility model proposes a lithium iron phosphate battery pack device that facilitates heat dissipation. Utility Model Content

[0006] The main objective of this invention is to provide a lithium iron phosphate battery pack device that facilitates heat dissipation, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A lithium iron phosphate battery pack device with convenient heat dissipation includes a battery pack body composed of several lithium iron phosphate battery bodies. The battery pack body is provided with a heat dissipation mechanism on the outside, and the heat dissipation mechanism includes a housing, a cooling fan, heat sinks, cooling pipes, a coolant tank, and a pump body. The cooling fan is fixedly connected to the bottom surface of the housing, and heat sinks are fixedly connected to the two side walls of the first chamber inside the housing. The cooling pipes are fixedly connected to heat dissipation grooves opened on the outer side walls of the heat sinks. The coolant tank is fixedly connected to the inside of the second chamber inside the housing, and the pump body is fixedly connected to the top surface of the coolant tank. A suction pipe is connected between the input end of the pump body and the outlet pipe on the right side of the coolant tank, and a delivery pipe is connected between the output end of the pump body and the input end of the cooling pipe. A return pipe is connected between the output end of the cooling pipe and the inlet pipe on the top surface of the coolant tank.

[0009] As a further embodiment of this utility model, bases are fixedly installed on the left and right sides of the bottom surface of the outer shell of the mechanism, a first chamber is opened on the left side of the inner surface of the outer shell of the mechanism, and a second chamber is opened on the right side of the inner surface of the outer shell of the mechanism.

[0010] As a further embodiment of this utility model, the bottom surface of the outer shell of the mechanism is provided with three heat dissipation vents, and a baffle is fixedly installed inside the heat dissipation vents. A cooling fan is also fixedly installed inside the heat dissipation vents and above the baffle.

[0011] As a further embodiment of this utility model, heat sinks are fixedly installed on both sides of the inner wall of the first chamber, and several heat dissipation grooves are opened on the outer side wall of the heat sinks. Several partitions are also fixedly installed in a horizontal array between the symmetrical heat sinks, and the lithium phosphate battery body is placed between adjacent partitions.

[0012] As a further embodiment of this utility model, the coolant tank is fixedly installed on the bottom surface of the second chamber, and an outlet pipe is fixedly installed on the bottom of the right side wall of the coolant tank, and an inlet pipe is fixedly installed behind the top surface of the coolant tank.

[0013] As a further embodiment of this utility model, the cooling pipe is serpentine and fixedly installed in the heat dissipation tank, the pump body is fixedly installed on the top surface of the coolant tank, and a suction pipe is fixedly installed between the input end of the pump body and the outlet pipe, a delivery pipe is fixedly installed between the output end of the pump body and the input end of the cooling pipe, and a return pipe is fixedly installed between the output end of the cooling pipe and the inlet pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, the heat dissipation mechanism, in conjunction with the battery pack body, allows individual lithium phosphate battery cells to be placed between adjacent partitions in the first chamber before use. These partitions separate the individual lithium phosphate battery cells, preventing heat transfer and temperature increases between them. Combined with the heat sinks on both sides of the first chamber, the heat from the lithium phosphate battery cells is quickly dissipated due to the material and structural characteristics of the heat sinks. Furthermore, a cooling fan installed in the heat dissipation vents expels the heat dissipated by the heat sinks from the outer casing of the mechanism to the outside. Simultaneously, a pump draws coolant from the coolant tank through the suction pipe and discharge pipe. The coolant is then transported to the cooling pipes via delivery pipes. Since the cooling pipes are installed in the heat dissipation grooves on the outer wall of the heat sink, the coolant can further absorb the heat dissipated by the heat sink and carry it away during the flow of the coolant in the cooling pipes according to the principle of heat exchange. Finally, the coolant will flow back to the coolant tank from the inlet pipe through the return pipe, so as to achieve the purpose of circulating water cooling and cooling of the battery pack. In this way, by actively dissipating the heat from the battery pack and then using both air cooling and water cooling to dissipate and cool the battery pack, the heat dissipation effect and efficiency of the battery pack can be improved, thereby ensuring the normal use of the battery pack composed of several lithium phosphate battery cells. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the outer shell of the present invention;

[0018] Figure 3 This is a schematic diagram of the bottom structure of the outer shell of the present invention;

[0019] Figure 4 This is a structurally disassembled schematic diagram of the heat dissipation mechanism of this utility model.

[0020] In the diagram: 1. Lithium phosphate battery body; 2. Battery pack body; 3. Heat dissipation mechanism; 4. Mechanism housing; 5. Base; 6. First chamber; 7. Second chamber; 8. Heat dissipation vent; 9. Baffle; 10. Cooling fan; 11. Heat sink; 12. Heat dissipation groove; 13. Partition; 14. Cooling pipe; 15. Coolant tank; 16. Outlet pipe; 17. Inlet pipe; 18. Pump body; 19. Suction pipe; 20. Delivery pipe; 21. Return pipe. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0022] like Figure 1 - Figure 4 As shown, a lithium iron phosphate battery pack device with convenient heat dissipation includes a battery pack body 2 composed of several lithium iron phosphate battery bodies 1. A heat dissipation mechanism 3 is provided on the outside of the battery pack body 2. The heat dissipation mechanism 3 includes a housing 4, a cooling fan 10, heat sinks 11, cooling pipes 14, a coolant tank 15, and a pump body 18. The cooling fan 10 is fixedly connected to the bottom surface of the housing 4, and heat sinks 11 are fixedly connected to the two side walls of the first chamber 6 inside the housing 4. The cooling pipes 14 are fixedly connected to the pump body 18. The coolant tank 15 is fixedly connected to the heat dissipation groove 12 opened on the outer wall of the heat sink 11. The coolant tank 15 is fixedly connected to the inside of the second chamber 7 inside the outer shell 4 of the mechanism. The pump body 18 is fixedly connected to the top surface of the coolant tank 15. The pump body 18 is connected to the liquid outlet pipe 16 on the right side of the coolant tank 15 by a liquid suction pipe 19. The pump body 18 is connected to the input end of the cooling pipe 14 by a delivery pipe 20. The cooling pipe 14 is connected to the output end of the cooling pipe 14 by a return pipe 21.

[0023] like Figure 2 As shown, bases 5 are fixedly installed on the left and right sides of the bottom surface of the outer casing 4. The outer casing 4 can provide external protection for the battery pack body 2. The bases 5 are used to support the entire device. A first chamber 6 is opened on the left side of the inner side of the outer casing 4. The first chamber 6 is used to accommodate the battery pack body 2. A second chamber 7 is opened on the right side of the inner side of the outer casing 4. The second chamber 7 is used to accommodate the coolant tank 15 and the pump body 18.

[0024] like Figure 3 As shown, the bottom surface of the housing 4 of the mechanism has three heat dissipation vents 8. The heat dissipation vents 8 can conduct heat out of the housing 4 of the mechanism. A baffle 9 is fixedly installed inside the heat dissipation vent 8. The baffle 9 can prevent foreign objects from entering the housing 4 of the mechanism through the heat dissipation vent 8. A cooling fan 10 is also fixedly installed inside the heat dissipation vent 8 and above the baffle 9. The cooling fan 10 can accelerate the heat dissipation of the battery pack body 2 and the heat dissipated from it to the outside through the heat dissipation vent 8, so as to play a role in air cooling of the battery pack body 2.

[0025] like Figure 4As shown, heat sinks 11 are fixedly installed on both sides of the inner wall of the first chamber 6, and several heat dissipation grooves 12 are opened on the outer side wall of the heat sinks 11. Several partitions 13 are fixedly installed in a horizontal array between the symmetrical heat sinks 11, and the lithium phosphate battery body 1 is placed between adjacent partitions 13. The heat sinks 11 can actively dissipate the heat inside the battery pack body 2, avoiding the heat from staying inside the battery pack body 2. By placing the lithium phosphate battery body 1 between adjacent partitions 13, several lithium phosphate battery bodies 1 can be separated, avoiding the problem of heat transfer between lithium phosphate battery bodies 1 after they come into contact with each other, which would cause the temperature of the entire battery pack body 2 to rise.

[0026] like Figure 4 As shown, the coolant tank 15 is fixedly installed on the bottom surface of the second chamber 7, and an outlet pipe 16 is fixedly installed on the bottom of the right side wall of the coolant tank 15. An inlet pipe 17 is fixedly installed behind the top surface of the coolant tank 15. The coolant tank 15 can store coolant, and the outlet pipe 16 can discharge the coolant in the coolant tank 15, while the inlet pipe 17 can allow the coolant to re-enter the coolant tank 15.

[0027] like Figure 4 As shown, the cooling pipe 14 is serpentine and fixedly installed in the heat dissipation tank 12. The pump body 18 is fixedly installed on the top surface of the coolant tank 15. A suction pipe 19 is fixedly installed between the input end of the pump body 18 and the outlet pipe 16. A delivery pipe 20 is fixedly installed between the output end of the pump body 18 and the input end of the cooling pipe 14. A return pipe 21 is fixedly installed between the output end of the cooling pipe 14 and the inlet pipe 17.

[0028] The specific operating principle of the heat dissipation mechanism 3 in conjunction with the battery pack body 2 is as follows:

[0029] Several lithium phosphate battery bodies 1 are sequentially placed between adjacent partitions 13 installed between heat sinks 11 installed on both sides of the inner wall of the first chamber 6. The battery bodies 1 are then connected positively and negatively to form a battery pack body 2. During actual use, the battery pack body 2 may experience heat rise due to various reasons, such as the heat generated during the charging and discharging of lithium iron phosphate batteries. Therefore, to prevent excessive heat in the battery pack body 2, heat dissipation is necessary. Since the several lithium phosphate battery bodies 1 are separated by the partitions 13, heat transfer between them is prevented, thus avoiding overheating. Furthermore, the heat sinks 11, based on their material and structural characteristics, can quickly dissipate heat from the inside of the lithium phosphate battery bodies 1. After entering the first chamber 6, the heat is further dissipated by the cooling fan 10 installed in the heat dissipation vent 8, accelerating the dissipation of the dissipated heat and the heat from the battery pack body 2 itself. The heat is discharged to the outside. At the same time, the pump body 18 draws the coolant stored in the coolant tank 15 from the coolant outlet pipe 16 through the liquid extraction pipe 19 installed on the input end, and delivers the low-temperature coolant to the serpentine cooling pipe 14 installed on the outer wall of the heat sink 11 and passing through the heat dissipation groove 12 through the delivery pipe 20 installed on the output end. During the flow of the low-temperature coolant in the cooling pipe 14, it absorbs the heat dissipated by the heat sink 11 according to the principle of heat exchange. Conversely, the low temperature of the coolant in the cooling pipe 14 can also be dissipated through the heat sink 11. The coolant is transferred to the battery pack body 2. Finally, the coolant that has flowed in the cooling pipe 14 will flow back to the coolant tank 15 from the inlet pipe 17 through the return pipe 21 installed on the output end, so as to further cool the battery pack body 2 with water cooling circulation. By actively removing the heat from the battery pack body 2 and using both air cooling and water cooling to cool the battery pack body 2, the heat dissipation effect and efficiency of the battery pack body 2 can be improved, thereby ensuring the normal use of the battery pack body 2.

[0030] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A lithium iron phosphate battery pack device with convenient heat dissipation, comprising a battery pack body (2) composed of a plurality of lithium iron phosphate battery bodies (1), characterized in that: The battery pack body (2) is provided with a heat dissipation mechanism (3) on its exterior. The heat dissipation mechanism (3) includes a housing (4), a cooling fan (10), heat sinks (11), cooling pipes (14), a coolant tank (15), and a pump body (18). The cooling fan (10) is fixedly connected to the bottom surface of the housing (4). Heat sinks (11) are fixedly connected to the two side walls of the first chamber (6) inside the housing (4). The cooling pipes (14) are fixedly connected to the heat dissipation grooves (12) opened on the outer side walls of the heat sinks (11). In the design, the coolant tank (15) is fixedly connected to the inside of the second chamber (7) inside the outer shell (4) of the mechanism, and the pump body (18) is fixedly connected to the top surface of the coolant tank (15). A suction pipe (19) is connected between the input end of the pump body (18) and the outlet pipe (16) on the right side of the coolant tank (15), and a delivery pipe (20) is connected between the output end of the pump body (18) and the input end of the cooling pipe (14). A return pipe (21) is connected between the output end of the cooling pipe (14) and the inlet pipe (17) on the top surface of the coolant tank (15).

2. The lithium iron phosphate battery pack device with easy heat dissipation according to claim 1, characterized in that: The bottom left and right sides of the outer shell (4) of the mechanism are respectively fixedly installed with bases (5), and the left side of the inner side of the outer shell (4) of the mechanism is provided with a first chamber (6), and the right side of the inner side of the outer shell (4) of the mechanism is provided with a second chamber (7).

3. The lithium iron phosphate battery pack device with convenient heat dissipation according to claim 2, characterized in that: The bottom surface of the outer shell (4) of the mechanism is provided with three heat dissipation holes (8), and a baffle (9) is fixedly installed inside the heat dissipation hole (8). A cooling fan (10) is also fixedly installed inside the heat dissipation hole (8) and above the baffle (9).

4. The lithium iron phosphate battery pack device with convenient heat dissipation according to claim 3, characterized in that: Heat sinks (11) are fixedly installed on both sides of the inner wall of the first chamber (6), and several heat sink grooves (12) are opened on the outer side wall of the heat sinks (11). Several partitions (13) are fixedly installed between the symmetrical heat sinks (11) in a horizontal array, and the lithium phosphate battery body (1) is placed between adjacent partitions (13).

5. A lithium iron phosphate battery pack device with easy heat dissipation according to claim 4, characterized in that: The coolant tank (15) is fixedly installed on the bottom surface of the second chamber (7), and an outlet pipe (16) is fixedly installed on the bottom of the right side wall of the coolant tank (15), and an inlet pipe (17) is fixedly installed behind the top surface of the coolant tank (15).

6. The lithium iron phosphate battery pack device with convenient heat dissipation according to claim 5, characterized in that: The cooling pipe (14) is serpentine and fixedly installed in the heat dissipation tank (12). The pump body (18) is fixedly installed on the top surface of the coolant tank (15). A suction pipe (19) is fixedly installed between the input end of the pump body (18) and the outlet pipe (16). A delivery pipe (20) is fixedly installed between the output end of the pump body (18) and the input end of the cooling pipe (14). A return pipe (21) is fixedly installed between the output end of the cooling pipe (14) and the inlet pipe (17).

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