Electronic device placement box of electric golf cart and temperature control method

Abstract

The invention relates to an electronic device placement box of an electric golf cart and a temperature control method, the placement box is made of two split shells, the placement box is convenient to assemble, the chassis space of the golf cart is reasonably utilized, a battery temperature control system can be utilized to cool a control circuit board at the same time, and the service life of electronic components is prolonged. In addition, a specific battery box is selected, and multi-stage temperature control is adopted, so that the battery temperature is more accurately controlled, the generation of thermal runaway is reduced, and the thermal runaway damage can be reduced.

Description

Technical Field

[0001] The invention relates to an electronic device placement box, and more particularly to an electronic device placement box for an electric golf cart and a temperature control method. Background Art

[0002] As an indispensable means of transportation on the golf course, electric golf carts not only provide players with a convenient and comfortable means of transportation, but also greatly improve the operational efficiency of the golf course. The core of the electric golf cart lies in its electric drive system and control system, and the electronic device placement box in these systems plays a vital role. The electronic device placement box of the electric golf cart is mainly responsible for protecting the electronic control unit, battery management system, drive motor controller and other key electrical components in the vehicle. These components are responsible for the vehicle's starting, acceleration, braking, power display and other functions. The electronic device placement box is an important guarantee to ensure the smooth operation of the electric golf cart.

[0003] The design of the placement box should not only meet the basic protection function, but also take into account environmental adaptability, heat dissipation management, and maintenance convenience. With the continuous development of electric vehicle technology, electric golf carts are also gradually adopting more advanced technologies. In the future, the placement box of electronic devices will be more intelligent and more integrated. Electric golf carts are generally powered by batteries, and the safety of batteries has always been an important aspect to consider, especially the heat generated by batteries has a great impact on safety. Although there are a lot of studies on the problem of battery heat dissipation, its control is not precise enough and not smart enough. This places higher requirements on the structure and heat dissipation of the placement box. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above background and provide an electronic device placement box for an electric golf cart and a temperature control method thereof, so that the electronic device placement box can effectively manage heat dissipation and avoid the influence of thermal runaway of the battery on the electronic components, thereby reducing damage to the electronic components, increasing service life and reducing costs.

[0005] The technical solution provided by the first aspect of the present invention is: an electronic device placement box for an electric golf cart, comprising a first shell and a second shell, the first shell having a first accommodating cavity, the second shell having a second accommodating cavity; wherein the first shell is fixedly connected to the second shell; a control circuit board is arranged in the first shell, an air pump, a temperature sensor, a battery box and a temperature control circuit are arranged in the second shell; the temperature control circuit comprises a pipeline and a temperature control board, a plurality of stacked battery packs are arranged in the battery box, a temperature control board is arranged between the battery packs, and the temperature sensor is used to detect the temperature of the battery pack; a heat exchanger and a battery box are connected via a pipeline, the air pump is connected to the battery box temperature control board via an air path, and the control circuit board controls the air pump, the temperature sensor, the battery box and the temperature control circuit in the second shell. The split arrangement in the present invention can also meet the needs of different vehicle models, and the position of the shell in the placement box can be adjusted according to the installation space to make reasonable use of the space. Two independent temperature control tubes and gas branch pipes are arranged in the temperature control board, wherein the temperature control tube connects the cavity between the inner shell of the battery box and the outer shell of the battery box; the gas branch pipe connects the air inlet and the air outlet; the gas branch pipe is arranged at intervals from the temperature control tube; a plastic valve is also arranged on the temperature control tube; a controllable nozzle is arranged on the gas branch pipe; wherein the controllable nozzle is arranged parallel and close to the position of the plastic valve, so that when thermal runaway occurs, the plastic valve on the temperature control tube on the temperature control board on the side of the battery cavity will melt, thereby allowing the coolant in the temperature control tube to flow into the battery cavity, and at the same time, the inflowing coolant is atomized by means of the controllable nozzle in the parallel position in the side gas branch pipe, so as to expand the spraying area. Improve the cooling or fire extinguishing effect.

[0006] Furthermore, the control circuit board is arranged at the bottom of the first shell, facing the top of the corresponding battery box in the second shell, so that the temperature control unit in the battery box can simultaneously control the temperature of the control circuit board in the first shell. The control circuit board is arranged at the bottom of the first shell, facing the top of the corresponding battery box in the second shell, so that the temperature control unit in the battery box can simultaneously control the temperature of the control circuit board in the first shell. That is, the battery pack and the control circuit board can be cooled simultaneously by means of the coolant in the battery box shell.

[0007] Furthermore, the battery box comprises a battery box inner shell and a battery box outer shell, wherein a cavity between the battery box inner shell and the battery box outer shell is used to contain a coolant.

[0008] Furthermore, the battery box includes a plurality of battery cavities, the battery cavities are separated by temperature control plates, and the battery packs are arranged in the battery cavities.

[0009] Furthermore, two independent temperature control tubes and air branch pipes are arranged in the temperature control board, wherein the temperature control tube is connected to the cavity between the battery box inner shell and the battery box outer shell to accommodate coolant; the air branch pipe connects the air inlet and the air outlet; the air branch pipe and the temperature control tube are arranged at intervals; a plastic valve is also arranged on the temperature control tube; and a controllable nozzle is arranged on the air branch pipe.

[0010] Furthermore, there are multiple temperature control tubes, and the multiple temperature control tubes are arranged in parallel or in a spiral arrangement.

[0011] Furthermore, the controllable nozzle is arranged on one side or both sides of the temperature control plate; and the plastic valve is arranged on one side or both sides of the temperature control plate.

[0012] Furthermore, a flame retardant layer is attached to the cover plate of the battery box facing the first shell, so that the front side of the battery box is flame retardant.

[0013] Furthermore, fireproof cotton or soft mud is arranged between the first shell and the second shell for fire prevention and noise reduction.

[0014] The second aspect of the present invention also includes a temperature control method, which uses the electronic device placement box of the electric golf cart, including: a control circuit board controls the operation, and a temperature sensor detects the ambient temperature and the temperature of the battery pack; when the ambient temperature is detected to be low and the battery pack is low, the control circuit board selects a heating circuit to heat the battery; when the ambient temperature is detected to be high and the battery pack is low, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; when the ambient temperature is detected to be low and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; when the ambient temperature is detected to be high and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; when the ambient temperature is detected to be high and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack.

[0015] Furthermore, when it is detected that the ambient temperature is low and the battery pack is low, the control circuit board selects a heating circuit to heat the battery. Specifically, the heating circuit is to set a heater on the heat exchanger side. When the coolant needs to be heated, the coolant temperature of the inner shell and the outer shell of the battery box is increased. The heat exchanger flows through the pipeline, the liquid inlet, the temperature control tube in the temperature control board and the upper and lower parts of the battery cavity, and flows into the heat exchanger through the liquid outlet to form a heating circuit.

[0016] Furthermore, when it is detected that the ambient temperature is high and the battery pack is low, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; specifically, the control circuit board controls the use of a low-temperature circuit to cool the battery pack, which only requires the first medium pipeline in the temperature control board (i.e., the temperature control tube in the temperature control board) for circulation cooling. The heater on the heat exchanger side does not work, and the heat exchanger flows through the pipeline, the liquid inlet, the temperature control tube in the temperature control board, and the upper and lower parts of the battery cavity, and flows into the heat exchanger through the liquid outlet to form a low-temperature circuit.

[0017] Furthermore, when the ambient temperature is detected to be low and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; and when the ambient temperature is detected to be high and the battery pack is high, the control circuit board controls the use of a high-temperature circuit to cool the battery pack. Specifically: when the control circuit board chooses to use a low-temperature circuit to cool the battery pack, the temperature detected by the temperature sensor is compared with the temperature threshold stored in the system. When the detected battery pack temperature is lower than the first high-temperature environment, only the temperature control tube is required for circulating cooling; when the detected battery pack temperature exceeds the first high-temperature environment and is lower than the second high-temperature environment, the temperature control tube and the gas branch work simultaneously; when the detected battery pack temperature exceeds the second high-temperature environment, the temperature control tube and the gas branch work simultaneously, and a portion of the controllable nozzles in the gas branch are opened; when the detected battery pack temperature exceeds the first high-temperature environment, the temperature control tube and the gas branch work simultaneously, and a portion of the controllable nozzles in the gas branch are opened; when the detected battery pack temperature exceeds the second high-temperature environment, the temperature control tube and the gas branch work simultaneously. When the temperature of the battery pack exceeds the fourth high temperature environment, thermal runaway will occur, and the plastic valve on the temperature control tube on the temperature control plate on the side of the battery cavity will melt, thereby causing the coolant in the temperature control tube to flow into the battery cavity. At the same time, the controllable nozzles in the gas branch pipe are used to form atomization to expand the spraying area and improve the cooling or fire extinguishing effect. The temperature relationship between each high temperature environment is: the first high temperature environment < the second high temperature environment < the third high temperature environment < the fourth high temperature environment.

[0018] The beneficial effects of the present invention are:

[0019] The electronic device placement box of the electric golf cart of the present invention is made of two separate shells, which is convenient for assembly and reasonable use of the chassis space of the golf cart. Multiple fireproof components, such as fireproof cotton and flame retardant layer, are used in the middle to avoid the influence of thermal runaway of the battery on the electronic components, thereby reducing damage to the electronic components, increasing service life and reducing costs. In addition, the split setting in the present invention can also meet the needs of different vehicle models, and the position of the shell in the placement box can be adjusted according to the installation space to reasonably use the space.

[0020] The control circuit board is arranged at the bottom of the first shell, facing the top of the corresponding battery box in the second shell, so that the temperature control unit in the battery box can simultaneously control the temperature of the control circuit board in the first shell. That is, the battery pack and the control circuit board can be cooled simultaneously by the coolant in the battery box shell.

[0021] In addition, the present invention takes advantage of the fact that golf carts often have air pumps, and by designing a battery box with a specific structure, the temperature control of the battery box can be improved. By setting two independent medium pipelines, multiple controllable nozzles and plastic valves are set on the upper and lower surfaces of the temperature control board leaking out of the pipeline, one of the pipelines is provided with a plastic valve connected to an external heat exchanger; the other pipeline is provided with a controllable nozzle connected to the external air pump. Then, different cooling methods can be selected according to different environments and battery temperatures, the cooling accuracy and flexibility can be improved, and the battery temperature can be controlled more accurately, stably and at a low cost.

[0022] The present invention selects a cooling space between the battery box shells, that is, the battery box includes a battery box inner shell and a battery box outer shell, wherein the cavity between the battery box inner shell and the battery box outer shell is used to accommodate a coolant, wherein a space between the battery box inner shell and the battery box outer shell is provided to accommodate a coolant as primary cooling or heating; the temperature control tube in the temperature control board is used as a primary cooling; the air branch pipe in the temperature control board is used as a secondary cooling; the controllable nozzle connected to the air branch pipe is used as a tertiary cooling, which can accelerate the cooling and reduce the battery combustion with the help of flame-retardant gas; finally, the temperature control tube in the temperature control board is provided with a plastic valve facing the battery cavity side as a fourth-stage cooling, and then the corresponding level of temperature control can be selected according to the temperature detected by the temperature sensor, thereby reducing the probability of thermal runaway of the battery, further reducing the influence of temperature on the battery life, and improving the battery life and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall diagram of the electronic device placement box of the present invention.

[0024] Figure 2 This is a first shell diagram of the electronic device placement box of the present invention.

[0025] Figure 3 It is a second shell diagram of the electronic device placement box of the present invention.

[0026] Figure 4 The present invention is a diagram of the connection between the battery box of the electronic device placement box and the heat exchanger, the air pump and the air storage box.

[0027] Figure 5 The battery box temperature control board plane of the present invention Figure 1 .

[0028] Figure 6 The battery box temperature control board plane of the present invention Figure 2 .

[0029] Figure 7 It is a cross-sectional view of the gas path in the battery box temperature control plate of the present invention.

[0030] Among them: 1. first shell, 2. control circuit board, 3. second shell, 4. air pump, 5. air storage box, 6. battery box, 6-1. battery box outer shell, 6-2. battery box inner shell, 7. heat exchanger, 8. pipeline, 9-1. battery cavity one, 9-2. battery cavity two, 9-3. battery cavity three, 10. temperature control board, 10-1. temperature control board one, 10-2 temperature control board two, 11-1. air inlet, 11-1-1 air branch, 11-2. air outlet, 11-3. air outlet, 12. directional valve, 13. liquid inlet, 14. liquid outlet; 15-1. temperature control tube, 15-2. temperature control tube, 16. plastic valve, 17. controllable nozzle. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0032] like Figure 1-7 An electronic device placement box for an electric golf cart includes a first shell 1 and a second shell 3, wherein the first shell 1 has a first accommodating cavity and the second shell 3 has a second accommodating cavity; wherein the first shell 1 and the second shell 3 are connected and fixed by a fixing structure (not shown); a control circuit board 2 is arranged in the first shell 1, and an air pump 4, a temperature sensor (not shown), a battery box 6 and a temperature control circuit (not shown) are arranged in the second shell 3; the temperature control circuit includes a pipeline 8 and a temperature control board 10, a plurality of stacked battery packs are arranged in the battery box 6, and the temperature control board 10 is arranged between the battery packs, and the temperature sensor is used to detect the temperature of the battery pack; the temperature control board 10, the heat exchanger 7 and the battery box 6 are connected via a pipeline 8.

[0033] The air pump 4 is also connected to the temperature control board 10 of the battery box 6 through an air path, and the control circuit board 2 controls the air pump 4, the temperature sensor, the battery box 6 and the temperature control circuit in the second shell 3.

[0034] like Figure 1-4 As shown, the control circuit board 2 is arranged at the bottom of the first housing 1, facing the top of the corresponding battery box 6 in the second housing 3, so that the temperature control unit in the battery box 6 can simultaneously control the temperature of the control circuit board 2 in the first housing 1. That is, the battery pack and the control circuit board 2 can be cooled simultaneously by the coolant in the battery box 6.

[0035] like Figure 4As shown, the battery box 6 includes a battery box inner shell 6-2 and a battery box outer shell 6-1, wherein the cavity between the battery box inner shell 6-2 and the battery box outer shell 6-1 is used to contain cooling liquid. The battery box 6 includes a plurality of battery cavities, which are formed by separating the cavity surrounded by the battery box inner shell 6-2 through the temperature control board 10, and a battery pack is arranged in the battery cavity; there are a plurality of temperature sensors (not shown), which can be arranged in the battery cavity and outside the battery box 6 in the second shell 3, for detecting the battery cavity temperature and the ambient temperature. Figure 4 As shown, the battery cavity includes battery cavity 9-1, battery cavity 9-2, and battery cavity 9-3, wherein the temperature control board 10 includes temperature control board 1 10-1 and temperature control board 2 10-2. Of course, the number of temperature control boards 10 and the number of battery cavities can also be other numbers.

[0036] The temperature control board 10 may be provided with a plurality of temperature control tubes 15-1, 15-2 to connect the cavity between the battery box inner shell 6-2 and the battery box outer shell 6-1. The temperature control tubes 15-1, 15-2 are used to contain coolant. The coolant flows into the temperature control tubes 15-1, 15-2 of the temperature control board 10 through the liquid inlet 13, and then flows into the liquid outlet 14 through the temperature control tubes 15-1, 15-2. In the embodiment of the present invention, the temperature control tubes 15-1, 15-2 are arranged in parallel. In other embodiments, the number of temperature control tubes may be more than three, and the temperature control tubes may also be arranged in a spiral.

[0037] like Figure 4-6 As shown, the temperature control board 10 is also provided with an air branch pipe 11-1-1, wherein one end of the air pump 4 is connected to the air branch pipe 11-1-1 in the temperature control board 10 via the air inlet air path 11-1, and the air branch pipe 11-1-1 is further connected to the air outlet air path 11-2. The air outlet air path 11-2 can be connected to the air outlet 11-3 and the air storage box 5 via the air path through the directional valve 12. The directional valve 12 can be selected as a solenoid valve, which is used to control the gas to be directly discharged to the external air gun, and the external air gun is used to clean the dust in the placement box or inflate the tire, etc.; the air outlet air path 11-2 can also be connected to the air storage box 5 via the heat exchanger 7 or directly via the air path to achieve the effect of recycling the gas.

[0038] The gas branch pipe 11-1-1 in the temperature control board 10 is arranged at intervals with the temperature control tubes 15-1 and 15-2, such as the temperature control tubes 15-1 and 15-2 are arranged on both sides of the gas branch pipe 11-1-1. Of course, the gas branch pipe 11-1-1 can also be arranged on one side or both sides of the temperature control tubes 15-1 and 15-2, or the gas branch pipe 11-1-1 and the temperature control tubes 15-1 and 15-2 are evenly arranged with each other.

[0039] Two independent gas branch pipes 11-1-1 and temperature control pipes 15-1 and 15-2 are arranged in the temperature control board 10. The temperature control pipes 15-1 and 15-2 are connected to the external heat exchanger 7; the gas branch pipe 11-1-1 is connected to the external air pump 4. Therefore, the working state of each pipe can be selected and controlled in stages according to the temperature conditions, so as to accurately control the battery temperature, reduce the thermal runaway of the battery, and improve the battery life.

[0040] like Figure 5-7 As shown, the temperature control tubes 15-1 and 15-2 are also provided with plastic valves 16, which can open the temperature control tubes at a certain temperature to facilitate the coolant in the temperature control tubes to flow into the battery cavity. If the temperature control tubes 15-1 and 15-2 are both provided with plastic valves 16, a controllable nozzle 17 can also be provided on the gas branch pipe 11-1-1, wherein the controllable nozzle 17 can be arranged at a position of the gas branch pipe 11-1-1 close to the plastic valve 16, and the controllable nozzle 17 is arranged parallel to the position of the plastic valve 16, so that when the coolant in the temperature control tubes 15-1 and 15-2 flows into the battery cavity, the coolant is atomized by means of the gas in the controllable nozzle 17 in the gas branch pipe 11-1-1, thereby expanding the spraying effect of the coolant and further improving the cooling or fire extinguishing effect.

[0041] The plastic valve 16 on the temperature control tube 15-1, 15-2 can be set on one side or both sides of the temperature control tube 15-1, 15-2 to face the battery cavity and leak into the battery cavity. The plastic valve 16 can be set in multiple positions, preferably near the two sides, such as Figure 6 Two plastic valves 16 are arranged near the middle positions of the left and right sides. The melting point of the plastic valve 16 is lower than the temperature of the temperature control plate 10, and the strength is low.

[0042] The controllable nozzle 17 is also arranged on one or both sides of the gas branch pipe 11-1-1 to face the battery cavity and leak into the battery cavity. It can be arranged at multiple positions, preferably at a position close to the plastic valve 16. The gas in the controllable nozzle 17 in the gas branch pipe 11-1-1 is used to atomize the coolant, expand the spraying effect of the coolant, and further improve the cooling or fire extinguishing effect.

[0043] A flame retardant layer may be attached to the cover plate (not shown) of the battery box 6 facing the first shell 1 to achieve flame retardancy on the front side of the battery box 6 .

[0044] The air pump 4 may include a round-head air pump mounting piece or a trapezoidal air pump mounting piece, which is used to install and fix the air pump to reduce vibration.

[0045] Fireproof cotton or mud can also be arranged between the components in the second shell 3 for fire prevention and noise reduction, such as setting fireproof cotton on the outside of the battery box.

[0046] A temperature control method, using the above-mentioned electronic device placement box of the electric golf cart, a control circuit board 2 controls the operation, and a temperature sensor detects the ambient temperature and the temperature of a battery pack; when the ambient temperature is detected to be low and the battery pack is low, the control circuit board 2 selects a heating circuit to heat the battery; when the ambient temperature is detected to be high and the battery pack is low, the control circuit board 2 controls the low-temperature circuit to cool the battery pack; when the ambient temperature is detected to be low and the battery pack is high, the control circuit board 2 controls the low-temperature circuit to cool the battery pack; when the ambient temperature is detected to be high and the battery pack is high, the control circuit board 2 controls the low-temperature circuit to cool the battery pack.

[0047] When the ambient temperature is detected to be low and the battery pack is low, the control circuit board 2 selects the heating circuit to heat the battery. Specifically, the heating circuit is to set a heater (not shown) on the side of the heat exchanger 7. When the coolant needs to be heated, the coolant temperature in the cavity between the inner shell 6-2 and the outer shell 6-1 in the battery box 6 is increased. The heat exchanger 7 flows through the pipeline, the liquid inlet 13, the temperature control tubes 15-1, 15-2 in the temperature control board 10 and the upper and lower parts of the battery cavity, and flows into the heat exchanger 7 through the liquid outlet 14 to form a heating circuit. The temperature of the battery pack is increased to meet the demand, and the temperature of the battery pack is prevented from being too low to reduce the working life and driving range of the battery.

[0048] When the ambient temperature is detected to be high and the battery pack is low, the control circuit board 2 controls the low temperature circuit to cool the battery pack; specifically, the control circuit board 2 controls the low temperature circuit to cool the battery pack, which only requires circulating cooling of the first medium pipeline in the temperature control board 10 (i.e., the temperature control tubes 15-1 and 15-2 in the temperature control board 10). The heater on the side of the heat exchanger 7 does not work, and the heat exchanger 7 flows through the pipeline, the liquid inlet 13, the temperature control tubes 15-1 and 15-2 in the temperature control board 10 and the upper and lower parts of the battery cavity, and flows into the heat exchanger 7 through the liquid outlet 14 to form a low temperature circuit.

[0049] When the ambient temperature is detected to be low and the battery pack is high, the control circuit board 2 controls the use of a low-temperature circuit to cool the battery pack; and when the ambient temperature is detected to be high and the battery pack is high, the control circuit board 2 controls the use of a low-temperature circuit to cool the battery pack. Specifically, when the control circuit board 2 chooses to use a low-temperature circuit to cool the battery pack, the temperature detected by the temperature sensor is compared with the temperature threshold stored in the system. When the detected battery pack temperature is lower than the first high-temperature environment, only the first medium pipeline (i.e., the temperature control tubes 15-1 and 15-2) is required to perform circulating cooling; when the detected battery pack temperature exceeds the first high-temperature environment and is lower than the second high-temperature environment, the temperature control tubes 15-1, 15-2 and the gas branch pipe 11-1-1 work simultaneously; when the detected battery pack temperature exceeds the second high-temperature environment, the temperature control tubes 15-1, 15-2 and the gas branch pipe 11-1-1 work simultaneously, and a part of the controllable nozzles 17 in the gas branch pipe 11-1-1 is opened to accelerate cooling; when the detected battery pack temperature exceeds the third high-temperature environment, the temperature control tubes 15-1, 15-2 Working simultaneously with the gas branch pipe 11-1-1, the controllable nozzles 17 in the gas branch pipe 11-1-1 are all opened to further accelerate cooling, and the gas in the battery cavity can also be discharged. The battery cavity is provided with a high-pressure valve (not shown) or is not completely sealed. When the gas pressure in the cavity is higher than a certain pressure, it will open to discharge the gas in the cavity to avoid affecting the battery, as long as it can be exhausted; when the detected battery pack temperature exceeds the fourth high temperature environment, thermal runaway will occur, wherein the plastic valves 16 on the temperature control tubes 15-1 and 15-2 on the temperature control board provided on the side of the battery cavity will melt or be broken, thereby allowing the coolant in the temperature control tube to flow into the battery cavity, and at the same time, with the help of the controllable nozzles 17 in the gas branch pipe 11-1-1, the inflowing coolant is atomized to expand the spraying area and improve the cooling or fire extinguishing effect. Among them, the first high temperature environment < the second high temperature environment < the third high temperature environment < the fourth high temperature environment. For example, the first high temperature environment is 60°C, the second high temperature environment is 80°C, the third high temperature environment is 95°C, and the fourth high temperature environment is 110°C.

[0050] The gas in the gas path can be a flame-retardant inert gas, such as nitrogen, carbon dioxide, etc., which can discharge the combustible gas in the battery cavity, reduce combustion, and play a role in extinguishing fire. The gas is generally at room temperature and can be used for cooling without heating.

[0051] The beneficial effects of the present invention are:

[0052] The electronic device placement box of the electric golf cart of the present invention is made of two separate shells, which is convenient for assembly and reasonable use of the chassis space of the golf cart. Multiple fireproof components, such as fireproof cotton and flame retardant layer, are used in the middle to avoid the influence of thermal runaway of the battery on the electronic components, thereby reducing damage to the electronic components, increasing service life and reducing costs. In addition, the split setting in the present invention can also meet the needs of different vehicle models, and the position of the shell in the placement box can be adjusted according to the installation space to reasonably use the space.

[0053] The control circuit board 2 is arranged at the bottom of the first housing 1, facing the top of the corresponding battery box 6 in the second housing 3, so that the temperature control unit in the battery box 6 can simultaneously control the temperature of the control circuit board 2 in the first housing 1. That is, the battery pack and the control circuit board 2 can be cooled simultaneously by means of the coolant in the battery box housing (in the cavity in the battery box outer shell 6-1 and the battery box inner shell 6-2).

[0054] In addition, the present invention can improve the temperature control of the battery box 6 through the battery box 6 with a specific structure, and by setting two independent medium pipelines (gas branch pipe 11-1-1, temperature control pipe 15-1, 15-2), multiple controllable nozzles 17 and plastic valves 16 are set on the upper and lower surfaces of the temperature control plate 10 in the medium pipeline, one of the medium pipelines is provided with a plastic valve 16 connected to the external heat exchanger; the other medium pipeline is provided with a controllable nozzle 17 connected to the external air pump 4. Then, different cooling methods can be selected according to different environments and battery temperatures, the cooling accuracy and flexibility can be improved, and the battery temperature can be controlled more accurately, stably and at a low cost.

[0055] The present invention selects a cooling space between the battery box shells, that is, the battery box 6 includes a battery box inner shell 6-1 and a battery box outer shell 6-2, wherein the cavity between the battery box inner shell 6-1 and the battery box outer shell 6-2 is used to accommodate a coolant, wherein a space between the battery box inner shell 6-1 and the battery box outer shell 6-2 is provided for accommodating a coolant, and the coolant is used for primary cooling or heating; the temperature control tubes 15-1 and 15-2 in the temperature control board 10 are used as primary cooling; the air branch pipe 11-1-1 in the temperature control board 10 is used as secondary cooling; the controllable nozzle 17 connected to the air branch pipe 11-1-1 is used as tertiary cooling; finally, the temperature control tubes 15-1 and 15-2 in the temperature control board 10 are provided with a plastic valve 16 facing the battery cavity side as a fourth-stage cooling, and then the corresponding level of temperature control can be selected according to the temperature detected by the temperature sensor, thereby reducing the occurrence of thermal runaway of the battery, further reducing the influence of temperature on the battery life, and improving the battery life and safety.

[0056] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electronic device placement box for an electric golf cart, comprising a first shell and a second shell, the first shell having a first accommodating cavity, the second shell having a second accommodating cavity; wherein the first shell is fixedly connected to the second shell; a control circuit board is arranged in the first shell, an air pump, a temperature sensor, a battery box and a temperature control circuit are arranged in the second shell; the temperature control circuit comprises a pipeline and a heat exchanger, a battery pack is arranged in the battery box, a temperature control board is arranged on one side or both sides of the battery pack, and the temperature sensor is used to detect the temperature of the battery pack; the heat exchanger and the battery box are connected via a pipeline; the air pump is connected to the battery box temperature control board via an air path, and the control circuit board controls the air pump, the temperature sensor, the battery box and the temperature control board in the second shell Temperature control circuit; two independent temperature control tubes and air branch pipes are arranged in the temperature control board, wherein the temperature control tube is connected to the cavity between the inner shell of the battery box and the outer shell of the battery box; the air branch pipe connects the air inlet and the air outlet; the air branch pipe and the temperature control tube are arranged at intervals; a plastic valve is also arranged on the temperature control tube; a controllable nozzle is arranged on the air branch pipe; wherein the controllable nozzle is arranged in parallel with the position of the plastic valve, so that when thermal runaway occurs, the plastic valve on the temperature control tube on the temperature control board on the side of the battery cavity will melt, thereby allowing the coolant in the temperature control tube to flow into the battery cavity, and at the same time, with the help of the controllable nozzle in the parallel position in the side air branch pipe, the inflowing coolant is atomized to expand the spraying area.

2. The electronic device placement box of an electric golf cart according to claim 1, characterized in that: The control circuit board is arranged at the bottom of the first shell, facing the top of the corresponding battery box in the second shell, so that the temperature control unit in the battery box can simultaneously control the temperature of the control circuit board in the first shell.

3. The electronic device placement box of an electric golf cart according to claim 1, characterized in that: The cavity between the battery box inner shell and the battery box outer shell is used to contain coolant.

4. The electronic device placement box of an electric golf cart according to claim 1 or 3, characterized in that: The battery box includes a plurality of battery cavities, the battery cavities are separated by the temperature control plate, and battery packs are arranged in the battery cavities.

5. The electronic device placement box of an electric golf cart according to claim 1, characterized in that: A flame retardant layer is attached to the cover plate of the battery box facing the first shell, so that the front of the battery box is flame retardant.

6. The electronic device placement box of an electric golf cart according to claim 1, characterized in that: There are multiple temperature control tubes, and the multiple temperature control tubes are arranged in parallel or in a spiral arrangement.

7. The electronic device placement box of an electric golf cart according to claim 1, characterized in that: The controllable nozzle is arranged on one side or both sides of the temperature control plate.

8. A temperature control method, characterized in that: Using the electronic device placement box of an electric golf cart as described in any one of claims 1 to 7, the temperature control method includes: The control circuit board controls the work, and the temperature sensor detects the ambient temperature and the temperature of the battery pack; When the ambient temperature is detected to be low and the battery pack is low, the control circuit board selects the heating circuit to heat the battery; When it is detected that the ambient temperature is high and the battery pack is low, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; When it is detected that the ambient temperature is low and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; When it is detected that the ambient temperature is high and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack.

9. The method according to claim 8, characterized in that: When it is detected that the ambient temperature is low and the battery pack is low, the control circuit board selects a heating circuit to heat the battery, including: the heating circuit includes a heater arranged on the side of the heat exchanger. When the coolant needs to be heated, the coolant temperature of the inner shell and the outer shell of the battery box is increased. The heat exchanger flows through the pipeline, the liquid inlet, the temperature control tube in the temperature control board and the upper and lower parts of the battery cavity, and flows into the heat exchanger through the liquid outlet to form a heating circuit.

10. The method according to claim 9, characterized in that: When the ambient temperature is detected to be low and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; or when the ambient temperature is detected to be high and the battery pack is high, the control circuit board controls the use of a low-temperature circuit to cool the battery pack; specifically: when the control circuit board chooses to use a low-temperature circuit to cool the battery pack, the temperature detected by the temperature sensor is compared with the temperature threshold stored in the system. When the detected battery pack temperature is lower than the first high-temperature environment, only the temperature control tube is required to perform circulating cooling; when the detected battery pack temperature exceeds the first high-temperature environment and is lower than the second high-temperature environment, the temperature control tube and the gas branch pipe work simultaneously; when the detected battery pack temperature exceeds the second high-temperature environment, the temperature control tube and the gas branch pipe work simultaneously. In a high temperature environment, the temperature control tube and the gas branch pipe work simultaneously, and a part of the controllable nozzles in the gas branch pipe are opened; when the detected battery pack temperature exceeds the third high temperature environment, all the controllable nozzles in the gas branch pipe are opened; when the detected battery pack temperature exceeds the fourth high temperature environment, the plastic valve on the temperature control tube on the temperature control board provided on the side of the battery cavity will melt, thereby allowing the coolant in the temperature control tube to flow into the battery cavity, and at the same time, with the help of the controllable nozzles in the gas branch pipe, the flowing coolant is atomized to expand the spraying area and improve the cooling or fire extinguishing effect; the temperature relationship between each high temperature environment is: first high temperature environment < second high temperature environment < third high temperature environment < fourth high temperature environment.

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