Agricultural equipment lithium battery pack with temperature control structure

Abstract

The agricultural equipment lithium battery pack with the temperature control structure comprises a box body, lithium batteries arranged at equal intervals are arranged in the box body, the lithium batteries are sleeved with phase change material layers fixedly connected with the lithium batteries, and the phase change material layers are sleeved with two sets of heat exchange pipes arranged at equal intervals; the heat exchange pipe is in a C shape, the two ends of the heat exchange pipe communicate with a water inlet pipe and a water outlet pipe correspondingly, and the front face of the box body is fixedly connected with a water inlet box and a water outlet box which are arranged in a staggered mode. According to the invention, the heat dissipation intensity of different parts of the lithium battery is flexibly controlled according to the heating degrees of different parts of the lithium battery, so that excessive heat dissipation of parts, which are not seriously heated, of the lithium battery is effectively avoided, the temperatures of all parts of the lithium battery are kept within the optimal range, and the working state of the lithium battery is improved.

Description

Technical Field

[0001] This invention relates to the field of lithium battery pack technology, and more specifically, to a lithium battery pack for agricultural equipment with a temperature control structure. Background Technology

[0002] The lithium battery pack for agricultural equipment with temperature control is a lithium-ion battery system specifically designed for agricultural machinery. It integrates a temperature management system (TMS) that can maintain the battery operating temperature within the optimal range under various environmental conditions.

[0003] Lithium battery packs for agricultural equipment typically consist of multiple lithium batteries connected in series. During daily use, the lithium batteries generate heat, requiring a heat dissipation structure to cool the battery pack. However, different parts of the lithium battery generate heat at different rates. If the entire battery pack is cooled, the temperature of some batteries that do not require cooling will drop below their optimal range, affecting the battery pack's performance. Furthermore, the charging and discharging interfaces of the battery pack lack a sealed structure. The working environment of agricultural equipment is often filled with dust or moisture, which can enter through gaps between the equipment's plug and the lithium battery pack's connector, potentially leading to malfunctions. Therefore, an agricultural equipment lithium battery pack with a temperature control structure is needed. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a lithium battery pack for agricultural equipment with a temperature control structure to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution; A lithium battery pack for agricultural equipment with a temperature control structure includes a housing. Inside the housing are lithium batteries arranged at equal intervals. A phase-change material layer is fixedly connected to each lithium battery. Two sets of equally spaced heat exchange tubes, each C-shaped, are mounted on the phase-change material layer. Each heat exchange tube has an inlet pipe and an outlet pipe connected to both ends. A staggered water inlet box and an outlet box are fixedly connected to the front of the housing. One end of each water inlet pipe penetrates the housing and connects to the water inlet box, and one end of each water outlet pipe penetrates the housing and connects to the water outlet box. Two water collection boxes are located on the front of the housing. A conduit connects the front of each water inlet and outlet box, and one end of each conduit connects to one of the two water collection boxes. A water box is fixedly connected and communicates with it. A water tank is provided between the two water collection boxes. The back of the water tank is fixedly connected to the inlet box and the outlet box respectively. A heat dissipation mechanism is provided on the water tank. A temperature sensor is installed on the inner wall of the outlet pipe. A flow valve is installed on the inlet pipe. A controller for controlling and adjusting the flow valve is installed on the left side of the box. The input terminal of the controller is connected to a temperature adjustment module. The input terminal of the temperature sensor is connected to the temperature adjustment module. A box cover is fixedly connected to the top of the box. A charging and discharging interface is installed on the box cover. A sealing mechanism is provided on the charging and discharging interface. Three electric heating rods are inserted through the top of the water tank. The input terminals of the three electric heating rods are all connected to the controller.

[0006] As a further description of the above technical solution: The heat dissipation mechanism includes four horizontal pipes, with each end of the four horizontal pipes connected to two water collection boxes and a water tank, respectively. A water pump is installed on each of the two horizontal pipes on the left side, and the input end of the water pump is connected to the controller signal. Two heat dissipation fins are installed on the inner wall of the water tank, and the front of the two heat dissipation fins extends through and to the front of the water tank.

[0007] As a further description of the above technical solution: A mounting bracket is fixedly connected to the front of the water tank, and a fan is embedded in the mounting bracket. The input end of the fan is connected to the controller signal.

[0008] As a further description of the above technical solution: A guide cylinder is fixedly connected to the front of the mounting bracket, and the fan is located inside the guide cylinder.

[0009] As a further description of the above technical solution: Temperature sensor 2 is installed on the inner wall of the water collection box on the right. The output of temperature sensor 2 is connected to a power-saving module, and the output of the power-saving module is connected to the controller.

[0010] As a further description of the above technical solution: The sealing mechanism includes an annular groove formed on the inner wall of the charging / discharging interface. An airbag is fixedly connected to the inner wall of the annular groove. A square box is fixedly connected to the top of the charging / discharging interface. A lead screw rotatably connected to the back of the square box is inserted therethrough. A piston plate threadedly connected to the lead screw is sleeved on the lead screw. The outer side of the piston plate contacts the inner wall of the square box. A vertical tube is connected to the bottom of the square box. The bottom end of the vertical tube passes through the charging / discharging interface and communicates with the airbag.

[0011] As a further description of the above technical solution: Two locking rods are fixedly connected to the front of the piston plate, and one end of each locking rod extends through and to the front of the square box.

[0012] As a further description of the above technical solution: One end of the locking rod has an adjusting rod threadedly connected to it, and the bottom end of the adjusting rod is positioned towards the center of the charging / discharging interface.

[0013] Compared with the prior art, the advantages of this invention are: This solution flexibly controls the intensity of heat dissipation for different parts of the lithium battery based on the degree of heat generation in different parts of the lithium battery, thereby effectively avoiding excessive heat dissipation in parts of the lithium battery that do not generate significant heat, keeping the temperature of all parts of the lithium battery within the optimal range, and improving the working condition of the lithium battery. The airbag seals the gap between the power cord plug and the charging / discharging interface of agricultural equipment, thereby effectively preventing dust or moisture from entering through the gap and improving the power supply stability and safety of the lithium battery pack. The locking lever will limit the plug, effectively preventing the plug of agricultural equipment from becoming loose and improving the power supply stability of agricultural equipment. Attached Figure Description

[0014] Figure 1 This is one of the perspective views of the present invention; Figure 2 This is a second perspective view of the present invention; Figure 3 This is a third perspective view of the present invention; Figure 4 This is a distribution diagram of the heat exchange tubes in this invention; Figure 5 This is a schematic diagram showing the positions of the temperature sensor and the flow valve in this invention; Figure 6 This is a perspective view of the heat exchange tube in this invention; Figure 7 This is a perspective view of the sealing structure in this invention; Figure 8 This is a partial cross-sectional view of the sealing structure in this invention; Figure 9 This is a schematic diagram of the present invention.

[0015] Explanation of the labels in the diagram: 1. Housing; 2. Lithium battery; 3. Phase conversion material layer; 4. Heat exchange tube; 5. Water inlet pipe; 6. Water outlet pipe; 7. Water inlet box; 8. Water outlet box; 9. Water collection box; 10. Pipe; 11. Water tank; 12. Heat dissipation mechanism; 121. Horizontal pipe; 122. Water pump; 123. Heat dissipation fins; 13. Temperature sensor one; 14. Flow valve; 15. Controller; 16. Temperature regulation module; 17. Housing cover; 18. Charging and discharging interface; 19. Sealing mechanism; 191. Annular groove; 192. Airbag; 193. Square box; 194. Lead screw; 195. Piston plate; 196. Vertical pipe; 20. Heating rod; 21. Mounting bracket; 22. Fan; 23. Guide cylinder; 24. Temperature sensor two; 25. Power saving module; 26. Locking rod; 27. Adjusting rod. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] Traditional lithium battery packs use overall heat dissipation, which can easily lead to excessively low temperatures in some parts of the battery pack, affecting its operating performance. To solve this problem, this invention provides Embodiment 1: Please see Figures 1-9In this invention: a lithium battery pack for agricultural equipment with a temperature control structure includes a housing 1. Inside the housing 1, lithium batteries 2 are arranged at equal intervals. A phase-change material layer 3 is fixedly connected to each lithium battery 2. Two sets of heat exchange tubes 4 are arranged at equal intervals on the phase-change material layer 3. The heat exchange tubes 4 are C-shaped, and both ends of each heat exchange tube 4 are connected to an inlet pipe 5 and an outlet pipe 6, respectively. An alternating water inlet box 7 and an outlet box 8 are fixedly connected to the front of the housing 1. One end of the water inlet pipe 5... A water pipe 6 passes through the housing 1 and is connected to the inlet box 7. One end of the outlet pipe 6 passes through the housing 1 and is connected to the outlet box 8. Two water collection boxes 9 are provided on the front of the housing 1. Both the inlet box 7 and the outlet box 8 are connected to conduits 10. One end of each conduit 10 is fixedly connected to and communicates with the two water collection boxes 9. A water tank 11 is provided between the two water collection boxes 9. The back of the water tank 11 is fixedly connected to the inlet box 7 and the outlet box 8. A heat dissipation mechanism 12 is provided on the water tank 11. A temperature sensor 13 is installed on the inner wall of pipe 6. A flow valve 14 is installed on the inlet pipe 5. A controller 15 for controlling and regulating the flow valve 14 is installed on the left side of the tank 1. The input terminal of the controller 15 is connected to a temperature regulation module 16. The input terminal of the temperature sensor 13 is connected to the temperature regulation module 16. A tank cover 17 is fixedly connected to the top of the tank 1. A charging and discharging interface 18 is installed on the tank cover 17. A sealing mechanism 19 is provided on the charging and discharging interface 18. The top of the water tank 11 is penetrated. Three heating rods 20 are inserted, and the input ends of the three heating rods 20 are all connected to the controller 15. The heat dissipation mechanism 12 includes four horizontal pipes 121. The two ends of the four horizontal pipes 121 are respectively connected to two water collection boxes 9 and a water tank 11. Water pumps 122 are installed on the two horizontal pipes 121 on the left side. The input ends of the water pumps 122 are connected to the controller 15. Two heat dissipation fins 123 are installed on the inner wall of the water tank 11. The front of the two heat dissipation fins 123 extends through and to the front of the water tank 11.

[0018] In this invention, two adjacent heat exchange tubes 4 form an annular heat dissipation ring. Multiple heat dissipation rings are distributed on each lithium battery 2. The cover 17 protects the circuit board and wires used in the series connection of the lithium batteries 2. The charging / discharging interface 18 is connected to the lithium battery 2. When the agricultural equipment is powered, the power cord plug is first inserted into the charging / discharging interface 18. Then, the lithium battery 2 discharges to supply power to the agricultural equipment. The lithium battery 2 generates heat during operation. This heat is first absorbed by the phase-change material layer 3, and then the temperature of the phase-change material layer 3 is transferred to the coolant in the heat exchange tubes 4. During continuous operation, the coolant in the heat exchange tubes 4 is heated. At this time, the controller 15 activates the water pump 122, which pumps the coolant from the left water collection box 9 through the left horizontal pipe. The coolant is drawn into the water tank 11 through the horizontal pipe 121 on the right and then enters the water collection box 9 on the right. The coolant then flows into the water inlet box 7 through the conduit 10. The coolant flows into each heat exchange tube 4 through multiple inlet pipes 5 on the water inlet box 7. The heated coolant in the heat exchange tube 4 is discharged from the outlet pipe 6 and flows into the outlet box 8. Then the heated coolant enters the water collection box 9 on the left through the conduit 10, thus completing the coolant circulation. During the circulation process, the coolant enters the water tank 11 and is cooled by the heat dissipation fins 123. The cooled coolant enters the heat exchange tube 4 and dissipates heat to the lithium battery 2 through the phase-change material layer 3, thereby achieving the effect of cooling the lithium battery 2.

[0019] During the heat dissipation process of lithium battery 2, temperature sensor 13 detects the temperature of the coolant in the outlet pipe 6 and the temperature of the coolant flowing out of heat exchange pipe 4. The detected temperature values ​​are sent to temperature regulation module 16 in real time. Temperature regulation module 16 is used to analyze the heating status of the lithium battery 2 corresponding to heat exchange pipe 4 based on the temperature values ​​collected by temperature sensor 13.

[0020] If the lithium battery 2 corresponding to the heat exchange tube 4 heats up severely, the temperature of the coolant flowing out of the heat exchange tube 4 will be higher. If the lithium battery 2 corresponding to the heat exchange tube 4 heats up less, the temperature of the coolant discharged from the heat exchange tube 4 will also be lower. Then, the temperature regulation module 16 will control the flow rate of the water inlet pipe 5 on the heat exchange tube 4 according to the heating status of the lithium battery 2.

[0021] If the portion of the lithium battery 2 corresponding to the heat exchange tube 4 overheats severely, the temperature regulation module 16 will send an overheat signal to the controller 15. The controller 15 will increase the opening of the flow valve 14 in the water inlet pipe 5 on the heat exchange tube 4, so that more coolant will flow into the heat exchange tube 4, thereby enhancing the heat dissipation of the severely overheated lithium battery 2.

[0022] If the portion of the lithium battery 2 corresponding to the heat exchange tube 4 does not overheat significantly, the temperature regulation module 16 will send an overcooling signal to the controller 15. The controller 15 will then reduce the opening of the flow valve 14 in the water inlet pipe 5 on the heat exchange tube 4, thereby reducing the flow rate of coolant into the heat exchange tube 4. This reduces the heat dissipation to the portion of the lithium battery 2 that is not overheating, effectively preventing excessive heat dissipation to the portion of the lithium battery 2 that is not overheating, keeping the temperature of all parts of the lithium battery 2 within the optimal range, and improving the working condition of the lithium battery 2.

[0023] When in use, if the temperature of lithium battery 2 is low, turn on the heating rod 20. The heating rod 20 will heat the coolant in the water tank 11, and the heated coolant will have a temperature-raising effect on lithium battery 2.

[0024] Please see Figures 1-5 The water tank 11 is fixedly connected to a mounting bracket 21, and a fan 22 is embedded in the mounting bracket 21. The input end of the fan 22 is connected to the controller 15.

[0025] In this invention, the coolant temperature is dissipated through the heat dissipation fins 123, but the heat dissipation effect is limited. The controller 15 turns on the fan 22, which draws air into the space between the water tank 11 and the mounting bracket 21. The air is then discharged to the front of the mounting bracket 21 by the fan 22. The fan 22 can accelerate the airflow speed on the surface of the heat dissipation fins 123, thereby improving the heat dissipation effect on the coolant in the water tank 11 and maintaining the stability of heat dissipation for the lithium battery 2.

[0026] Please see Figures 1-5 The mounting bracket 21 is fixedly connected to the front of the guide tube 23, and the fan 22 is located inside the guide tube 23.

[0027] In this invention, the air exhausted by the fan 22 may be re-drawn into the surface of the heat dissipation fins 123. The guide tube 23 can guide the exhaust air, allowing the hot air to be discharged towards the front of the battery pack, effectively reducing the possibility of hot air being re-drawn back, thereby improving the practicality of the device.

[0028] Please see Figure 5 and 9 Among them: a temperature sensor 24 is installed on the inner wall of the water collection box 9 on the right side. The output terminal of the temperature sensor 24 is connected to the power saving module 25. The output terminal of the power saving module 25 is connected to the controller 15.

[0029] In this invention, temperature sensor 24 is used to detect the temperature of the coolant in the right-side water collection box 9 in real time, and sends the detected temperature to the power-saving module 25 in real time. The power-saving module 25 will select whether to turn on the fan 22 based on the detected data. When the heat dissipation effect of the heat dissipation fins 123 is sufficient to dissipate the coolant, the temperature detected by temperature sensor 24 is normal. When the heat dissipation effect of the heat dissipation fins 123 is insufficient to dissipate the coolant, the temperature of the coolant flowing into the right-side water collection box 9 is relatively high. At this time, temperature sensor 24 will send a signal to the controller 15, and the controller 15 will turn on the fan 22 to assist the heat dissipation fins 123 in cooling the coolant in the water tank 11.

[0030] The working environment of agricultural equipment is often filled with dust or moisture. Dust and moisture can enter through the gap between the plug and the charging / discharging interface 18, causing a power supply failure in the lithium battery pack. To solve this problem, the present invention provides Embodiment Two: Please see Figure 8 The sealing mechanism 19 includes an annular groove 191, which is formed on the inner wall of the charging and discharging interface 18. An airbag 192 is fixedly connected to the inner wall of the annular groove 191. A square box 193 is fixedly connected to the top of the charging and discharging interface 18. A lead screw 194 is inserted through the back of the square box 193 and rotatably connected thereto. A piston plate 195 is sleeved on the lead screw 194 and threadedly connected thereto. The outer side of the piston plate 195 contacts the inner wall of the square box 193. A vertical tube 196 is connected to the bottom of the square box 193. The bottom end of the vertical tube 196 passes through the charging and discharging interface 18 and is connected to the airbag 192.

[0031] In this invention, during use, after the agricultural equipment's power cord plug is inserted into the charging / discharging interface 18 to complete the connection, the user rotates the lead screw 194. The lead screw 194 is threadedly connected to the piston plate 195. The lead screw 194 will drive the piston plate 195 to slide along the inner wall of the square box 193. During this process, the air in the square box 193 will be squeezed into the airbag 192 through the vertical pipe 196. The airbag 192 will then expand, and its inner side will move closer to the connector surface. After the inner side of the airbag 192 is tightly attached to the connector, the airbag 192 will seal the gap between the agricultural equipment's power cord plug and the charging / discharging interface 18, thereby effectively preventing dust or moisture from entering through the gap and improving the power supply stability and safety of the lithium battery pack.

[0032] Agricultural equipment may vibrate during operation, which can cause the connection between the equipment and the charging / discharging interface 18 to loosen, affecting the stability of the equipment. To solve this problem, the present invention provides Embodiment 3: Please see Figure 8 and 7Among them, two locking rods 26 are fixedly connected to the front of the piston plate 195, and one end of the front of each locking rod 26 extends through and to the front of the square box 193.

[0033] In this invention, when the piston plate 195 moves to inflate the airbag 192, the piston plate 195 will drive the two locking rods 26 to move toward the agricultural equipment plug. After the airbag 192 is inflated, the locking rods 26 will be located above the agricultural equipment plug. The locking rods 26 will limit the plug, effectively preventing the agricultural equipment plug from becoming loose with the charging / discharging interface 18, and improving the stability of power supply to the agricultural equipment.

[0034] Please see Figure 7 and 8 The locking rod 26 has an adjusting rod 27 threadedly connected to one end of its front side, and the bottom end of the adjusting rod 27 is positioned towards the middle of the charging / discharging interface 18.

[0035] In this invention, when using a smaller agricultural equipment plug, the airbag 192 is inflated. At this time, the locking rod 26 cannot effectively limit the agricultural equipment plug. The user rotates the adjusting rod 27, which moves closer to the plug. After the adjusting rod 27 contacts the plug, it can lock the smaller agricultural equipment plug, thus improving the practicality of the device.

[0036] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A lithium battery pack for agricultural equipment with a temperature control structure, comprising a housing (1), characterized in that: The interior of the housing (1) is provided with lithium batteries (2) arranged at equal intervals. A phase-change material layer (3) is fixedly connected to the lithium batteries (2). Two sets of heat exchange tubes (4) are arranged at equal intervals on the phase-change material layer (3). The heat exchange tubes (4) are C-shaped. Both ends of the heat exchange tubes (4) are respectively connected to a water inlet pipe (5) and a water outlet pipe (6). The front of the housing (1) is fixedly connected with an alternating water inlet box (7) and a water outlet box (8). One end of the inlet pipe (5) passes through the box body (1) and is connected to the inlet box (7). One end of the outlet pipe (6) passes through the box body (1) and is connected to the outlet box (8). Two water collection boxes (9) are provided on the front of the box body (1). The front of both the inlet box (7) and the outlet box (8) are connected to conduits (10). One end of each of the two sets of conduits (10) is fixedly connected to and connected to the two water collection boxes (9). The two water collection boxes (9) are connected to each other. A water tank (11) is provided in the middle. The back of the water tank (11) is fixedly connected to the water inlet box (7) and the water outlet box (8) respectively. A heat dissipation mechanism (12) is provided on the water tank (11). A temperature sensor (13) is installed on the inner wall of the water outlet pipe (6). A flow valve (14) is installed on the water inlet pipe (5). A controller (15) for controlling and regulating the flow valve (14) is installed on the left side of the box body (1). The input terminal of the controller (15) is connected to a signal. Temperature regulation module (16), the input end of temperature sensor (13) is connected to temperature regulation module (16) signal, the top of the box (1) is fixedly connected to box cover (17), the box cover (17) is equipped with charging and discharging interface (18), the charging and discharging interface (18) is provided with sealing mechanism (19), the top of the water tank (11) is inserted with three electric heating rods (20), the input ends of the three electric heating rods (20) are all connected to controller (15) signal.

2. The lithium battery pack for agricultural equipment with a temperature control structure according to claim 1, characterized in that: The heat dissipation mechanism (12) includes four horizontal pipes (121). The two ends of the four horizontal pipes (121) are respectively connected to two water collection boxes (9) and a water tank (11). Water pumps (122) are installed on the two horizontal pipes (121) on the left side. The input end of the water pump (122) is connected to the controller (15) for signal connection. Two heat dissipation fins (123) are installed on the inner wall of the water tank (11). The front of the two heat dissipation fins (123) extends through and to the front of the water tank (11).

3. The lithium battery pack for agricultural equipment with a temperature control structure according to claim 1, characterized in that: The water tank (11) is fixedly connected to a mounting bracket (21), and a fan (22) is embedded in the mounting bracket (21). The input end of the fan (22) is connected to the controller (15) via signal.

4. The lithium battery pack for agricultural equipment with a temperature control structure according to claim 3, characterized in that: The front of the mounting bracket (21) is fixedly connected to the guide cylinder (23), and the fan (22) is located inside the guide cylinder (23).

5. A lithium battery pack for agricultural equipment with a temperature control structure according to claim 1, characterized in that: Temperature sensor 2 (24) is installed on the inner wall of the water collection box (9) on the right. The output of temperature sensor 2 (24) is connected to power saving module (25). The output of power saving module (25) is connected to controller (15).

6. The lithium battery pack for agricultural equipment with a temperature control structure according to claim 1, characterized in that: The sealing mechanism (19) includes an annular groove (191), which is formed on the inner wall of the charging and discharging interface (18). An airbag (192) is fixedly connected to the inner wall of the annular groove (191). A square box (193) is fixedly connected to the top of the charging and discharging interface (18). A lead screw (194) is inserted through the back of the square box (193) and rotated therewith. A piston plate (195) is threadedly connected to the lead screw (194). The outer side of the piston plate (195) is in contact with the inner wall of the square box (193). A vertical tube (196) is connected to the bottom of the square box (193). The bottom end of the vertical tube (196) passes through the charging and discharging interface (18) and is connected to the airbag (192).

7. A lithium battery pack for agricultural equipment with a temperature control structure according to claim 6, characterized in that: Two locking rods (26) are fixedly connected to the front of the piston plate (195), and one end of each locking rod (26) extends through and to the front of the square box (193).

8. A lithium battery pack for agricultural equipment with a temperature control structure according to claim 7, characterized in that: One end of the locking rod (26) is threaded with an adjusting rod (27), the bottom end of which is positioned toward the middle of the charging / discharging interface (18).

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