Battery cooling device and method for electric motorcycle

Abstract

The application relates to the technical field of battery heat dissipation, and discloses a battery heat dissipation and cooling device and method for an electric motorcycle, wherein the battery heat dissipation and cooling device for the electric motorcycle comprises a protective shell, a battery is located in the protective shell, a plurality of heat dissipation blocks are fixedly connected to the outside of the protective shell, a limiting plate, a cold water pipe, a circulating pump, a cold air fan and a temperature sensor are further arranged, the limiting plate is in contact with the inner wall of the protective shell, a mounting opening for the battery to pass through is formed in the limiting plate, a plurality of air holes are formed in the limiting plate, the cold water pipe is arranged in the side wall of the protective shell, the cold water pipe is connected with an atomizing nozzle, the water inlet of the circulating pump is communicated with the bottom of the protective shell, the water outlet of the circulating pump is communicated with the cold water pipe, the cold air fan is installed on the protective shell, and the temperature sensor is installed in the protective shell. Through the technical scheme, the problem that the natural heat dissipation mode in the prior art is difficult to meet the requirements of high-power battery and high-temperature heat dissipation during charging is solved.

Description

Technical Field

[0001] This invention relates to the field of battery heat dissipation technology, specifically to a battery heat dissipation and cooling device and method for electric motorcycles. Background Technology

[0002] Electric motorcycle batteries are rechargeable batteries used to power electric motorcycles, electric bicycles, or electric two-wheelers. They feature high-rate discharge, environmental friendliness, and energy saving. Electric motorcycle batteries typically use lead-acid batteries and lithium batteries. With technological advancements, lithium batteries are gradually replacing lead-acid batteries. These lithium batteries are characterized by high energy density, light weight, fast charging speed, high performance, and rechargeability.

[0003] Currently, electric motorcycle batteries typically use natural heat dissipation, meaning that no active cooling device is added to cool the battery. They rely on passive heat dissipation and heat exchange with the outside environment. When the battery power is high or during charging, the battery will generate significant heat. Natural heat dissipation is difficult to meet diverse usage needs and can easily lead to safety accidents. In modern society where people's safety awareness is gradually increasing, more attention is paid to the heat dissipation and cooling of batteries to ensure their safe use. Summary of the Invention

[0004] This invention proposes a battery cooling device and method for electric motorcycles, which solves the problem that the natural heat dissipation method in the prior art is difficult to meet the requirements of high battery power and high temperature heat dissipation during charging.

[0005] The technical solution of the present invention is as follows: A battery heat dissipation and cooling device for electric motorcycles, comprising a protective shell, with the battery located inside the protective shell, and further comprising:

[0006] A limiting plate is provided, which abuts against the inner wall of the protective shell, and the limiting plate is provided with an installation port for the battery to pass through;

[0007] A cold water pipe is disposed inside the side wall of the protective shell, and the cold water pipe is connected to an atomizing nozzle for spraying cold water into the interior of the protective shell.

[0008] A circulating pump, wherein the inlet of the circulating pump is connected to the bottom of the protective shell, and the outlet of the circulating pump is connected to the cold water pipe;

[0009] A cooler, which is mounted on the protective housing, is used to blow gas into the interior of the protective housing;

[0010] A temperature sensor is installed inside the protective housing.

[0011] To cool the water in the cold water pipe, the outlet of the circulating pump is connected to the cold water pipe through a heat dissipation pipe, and multiple heat dissipation fins are fixedly connected to the outside of the heat dissipation pipe.

[0012] To further improve the heat dissipation effect on the water inside the cold water pipe, the heat dissipation pipe is bent and installed on the outside of the protective shell.

[0013] To protect the circulating pump and the heat dissipation pipe, a protective frame is fixedly connected to the outside of the protective shell, and the heat dissipation pipe is located inside the protective frame.

[0014] To improve the heat dissipation of the protective shell, multiple heat dissipation blocks are fixedly connected to the outside of the protective shell, and the outer surface of the heat dissipation blocks is arc-shaped.

[0015] To improve airflow within the protective casing, multiple ventilation holes are provided on the limiting plate.

[0016] To dissipate heat from the bottom of the battery, multiple grooves are provided on the inner bottom wall of the protective shell.

[0017] To ensure the battery's airtightness, a sealing cover is installed on the top of the battery, and the battery wiring is located inside the sealing cover.

[0018] To allow for ventilation inside the protective shell and prevent excessive internal pressure, a cover plate is detachably connected to the top of the protective shell, and an air exchange pipe is connected to the cover plate.

[0019] To reduce moisture loss, an absorbent sponge is installed inside the ventilation pipe, and a compression member is provided on the ventilation pipe for squeezing the absorbent sponge. The compression member includes:

[0020] The fixing frame is fixedly connected to the inside of the ventilation pipe;

[0021] An extrusion plate is movably disposed inside the ventilation pipe, and the absorbent sponge is located between the fixing frame and the extrusion plate, with the extrusion plate and the absorbent sponge in contact.

[0022] A method for cooling a battery in an electric motorcycle, using the aforementioned cooling device for a battery in an electric motorcycle, includes the following steps:

[0023] S1. Place the battery inside the protective shell and install it inside the mounting port. The limiting plate and the inner wall of the protective shell should contact each other. Attach the cover plate to the top of the protective shell and connect the battery wiring to the electric motorcycle.

[0024] S2. The temperature sensor monitors the temperature inside the protective shell. Under normal conditions, the bottom of the battery is immersed in cold water, and the air cooler causes air circulation inside the protective shell and air exchange through the ventilation pipe.

[0025] S3. When the temperature sensor detects that the temperature has risen to a certain level, it controls the circulation pump to start, drawing cold water from inside the protective shell into the heat exchange tube and sending it into the cold water pipe. The cold water in the cold water pipe is sprayed onto the surface of the battery through the atomizing nozzle to cool the battery down.

[0026] The working principle and beneficial effects of this invention are as follows:

[0027] 1. In this invention, the battery is cooled under normal conditions by immersing it in cold water, while a cooling fan circulates the air inside the protective casing to cool the battery.

[0028] 2. In this invention, the temperature inside the protective shell is monitored by a temperature sensor. When the temperature inside the protective shell is detected to be too high, an electrical signal is sent to the controller to control the circulation pump to start, so that cold water circulates between the protective shell and the cold water pipe. The water mist is sprayed onto the surface of the battery through an atomizing nozzle to cool it down. At the same time, when the cold water enters the heat dissipation pipe, it is cooled by the bent heat dissipation pipe and heat dissipation fins to ensure that the cold water is at a low temperature, thereby ensuring the cooling effect on the battery.

[0029] 3. In this invention, the air cooler generates circulating air inside the protective shell, and the heat exchange tubes realize the air exchange between the inside and outside of the protective shell. The water-absorbing sponge absorbs water vapor, reducing the escape of water vapor. At the same time, the extrusion plate squeezes the water-absorbing sponge, squeezing the water inside the sponge into the interior of the protective shell, preventing the reduction of water in the protective shell, thereby ensuring the water cooling effect on the battery.

[0030] 4. Therefore, compared with the battery heat dissipation and cooling devices in the prior art, the present invention uses cold water inside the protective shell to immerse and cool the battery. A cold air blower keeps the air inside the protective shell in a state of circulation. A temperature sensor monitors the temperature inside the protective shell. If the temperature rises, the circulation pump is activated to circulate the cold water and spray water mist onto the battery surface for water cooling. The water is cooled by heat dissipation pipes and heat sinks to ensure the low temperature of the cold water, thereby ensuring the cooling effect on the battery. The cold water keeps the inside of the protective shell at a low temperature, allowing the cold air blown by the cold air blown inside the protective shell to diffuse and improve the cooling effect on the battery. The ventilation pipe realizes the air exchange between the inside and outside of the protective shell, thereby achieving air cooling of the battery. The water-absorbing sponge absorbs water vapor to prevent water from escaping through the ventilation pipe, thereby ensuring the amount of cold water inside the protective shell. The squeezing plate squeezes the water in the water-absorbing sponge into the protective shell, ensuring the water absorption capacity of the water-absorbing sponge. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 This is a first-view structural diagram of the entire invention;

[0033] Figure 2 This is a partially sectional, exploded structural diagram of the present invention;

[0034] Figure 3 This is a second-view structural schematic diagram of the entire invention;

[0035] Figure 4 This is a schematic diagram of the structure of the cold water pipe, atomizing nozzle, circulating pump, and heat dissipation pipe of the present invention.

[0036] Figure 5 This is a schematic diagram of the structure of the battery, limiting plate, and sealing cover of the present invention;

[0037] Figure 6 This is a schematic diagram of the protective shell, air cooler, and temperature sensor of the present invention;

[0038] Figure 7 This is a first-view structural schematic diagram of the ventilation pipe, absorbent sponge, and extrusion component of the present invention.

[0039] Figure 8 This is a second-view structural schematic diagram of the ventilation pipe, absorbent sponge, and extrusion component of the present invention.

[0040] In the picture:

[0041] 1. Protective shell; 2. Heat sink; 3. Limiting plate; 4. Cold water pipe; 5. Atomizing nozzle; 6. Circulating pump; 7. Sealing cover; 8. Air cooler; 9. Temperature sensor; 10. Heat sink; 11. Heat sink fins; 12. Protective frame; 13. Cover plate; 14. Ventilation pipe; 15. Absorbent sponge;

[0042] 101. Fixing frame; 102. Extrusion plate; 103. Electric cylinder. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figures 1 to 8As shown, this embodiment proposes a battery cooling device for electric motorcycles, including a protective shell 1, with the battery located inside the protective shell 1. Multiple heat dissipation blocks 2 are fixedly connected to the outside of the protective shell 1. The outer surface of the heat dissipation blocks 2 is arc-shaped, which increases the heat exchange area between the protective shell 1 and the outside environment, thereby improving the passive heat dissipation effect of the battery inside the protective shell 1. It also includes a limiting plate 3, a cold water pipe 4, a circulation pump 6, a cooling fan 8, and a temperature sensor 9. Compared with existing battery cooling devices, this invention uses cold water inside the protective shell 1 to immerse and cool the battery. The cooling fan 8 circulates the air inside the protective shell 1, and the temperature sensor 9 monitors the temperature inside the protective shell 1. When the temperature rises, the circulation pump is controlled. Turning on 6 allows cold water to circulate and spray water mist onto the battery surface for water cooling. The water is cooled by the heat dissipation pipe 10 and heat sink 11, ensuring the cold water remains at a low temperature and thus ensuring the cooling effect on the battery. The cold water keeps the interior of the protective shell 1 at a low temperature, allowing the air cooler 8 to blow cold air into the protective shell 1, improving the cooling effect on the battery. The ventilation pipe 14 facilitates air exchange between the inside and outside of the protective shell 1, thus providing air cooling for the battery. The water-absorbing sponge 15 absorbs moisture, preventing water from escaping through the ventilation pipe 14 and ensuring the amount of cold water inside the protective shell 1. The squeezing plate 102 forces the water in the water-absorbing sponge 15 into the interior of the protective shell 1, ensuring the water absorption capacity of the water-absorbing sponge 15.

[0045] like Figure 2 and Figure 5 As shown, the limiting plate 3 and the inner wall of the protective shell 1 abut against each other. The limiting plate 3 has an installation port for the battery to pass through, and multiple ventilation holes are provided on the limiting plate 3. The battery is installed inside the installation port, and the limiting plate 3 limits the battery. At the same time, the limiting plate 3 is made of elastic material, such as rubber, which can protect the battery and absorb external impacts. There is a certain sliding damping between the limiting plate 3, the outer wall of the battery, and the inner wall of the protective shell 1, which can ensure the stability of the battery.

[0046] like Figures 1 to 4As shown, the cold water pipe 4 is located inside the side wall of the protective shell 1. The cold water pipe 4 is connected to an atomizing nozzle 5 for spraying cold water into the interior of the protective shell 1. The inlet of the circulation pump 6 is connected to the bottom of the protective shell 1, and the outlet of the circulation pump 6 is connected to the cold water pipe 4. The interior of the protective shell 1 contains cold water, and the lower part of the battery is immersed in the cold water. The battery is cooled by water cooling. The circulation pump 6 can send the cold water in the protective shell 1 into the cold water pipe 4 to cool the side wall of the protective shell 1. Some of the cold water is sprayed out through the atomizing nozzle 5. Water mist is sprayed onto the surface of the battery to further cool it down, thus ensuring the cooling effect. The battery casing has good waterproof effect to prevent cold water from damaging the battery. At the same time, to ensure the battery's airtightness, a sealing cover 7 is installed on the top of the battery, and the battery circuit is located inside the sealing cover 7 to prevent water vapor from corroding or short-circuiting the battery circuit. To dissipate heat from the bottom of the battery, multiple grooves are opened on the inner bottom wall of the protective shell 1, so that cold water can come into contact with the bottom wall of the battery and cool the battery more comprehensively.

[0047] like Figure 2 and Figure 6 As shown, the air cooler 8 is installed on the protective shell 1 and is used to blow gas into the interior of the protective shell 1. The air cooler 8 is installed inside the protective shell 1 and above the water surface. Under the action of the air cooler 8, the air inside the protective shell 1 flows. The cold water keeps the interior of the protective shell 1 at a lower temperature, thereby generating cold air inside the protective shell 1 to cool the battery. The vent on the limiting plate 3 allows the cold air to flow more comprehensively inside the protective shell 1, thereby achieving better air cooling of the battery.

[0048] Temperature sensor 9 is installed inside the protective shell 1. Temperature sensor 9 monitors the temperature inside the protective shell 1. When the battery is working at high power or charging, temperature sensor 9 detects the temperature rise and transmits an electrical signal to the controller, which controls the circulation pump 6 to start, so that cold water circulates and water mist is sprayed on the surface of the battery to cool it down.

[0049] To cool the water in the cold water pipe 4, the outlet of the circulating pump 6 is connected to the cold water pipe 4 through the heat dissipation pipe 10. Multiple heat dissipation fins 11 are fixedly connected to the outside of the heat dissipation pipe 10. The heat dissipation pipe 10 is bent and set outside the protective shell 1. A protective frame 12 is fixedly connected to the outside of the protective shell 1. The heat dissipation pipe 10 is located inside the protective frame 12. When cold water enters the heat dissipation pipe 10, it is cooled by the bent heat dissipation pipe 10 and the heat dissipation fins 11 to ensure the low temperature of the cold water, thereby ensuring the cooling effect on the battery. The protective frame 12 is a breathable structure, which protects the circulating pump 6 and the heat dissipation pipe 10 while ensuring the heat dissipation effect of the heat dissipation pipe 10 and the heat dissipation fins 11.

[0050] like Figures 1 to 8As shown, to vent air from the protective shell 1 and prevent excessive internal pressure, a cover plate 13 is detachably connected to the top of the protective shell 1. A ventilation pipe 14 is connected to the cover plate 13. An absorbent sponge 15 is installed inside the ventilation pipe 14. A pressing component for squeezing the absorbent sponge 15 is provided on the ventilation pipe 14. The pressing component includes a fixing frame 101 and a pressing plate 102. The fixing frame 101 is fixedly connected inside the ventilation pipe 14, and the pressing plate 102 is movably disposed inside the ventilation pipe 14. An electric cylinder 103 is installed on the ventilation pipe 14. The output end of the electric cylinder 103 extends into the ventilation pipe 14 and is fixedly connected to the pressing plate 102. The absorbent sponge 15 is located between the fixing frame 101 and the pressing plate 102, and the pressing plate 102 contacts the absorbent sponge 15. Under the action of the air cooler 8, airflow is generated inside the protective shell 1, and the absorbent sponge 15 is vented. The air duct 14 facilitates air exchange between the inside and outside of the protective shell 1, expelling the high-temperature air inside the protective shell 1. As the air is expelled, some moisture rises with the airflow and is absorbed by the water-absorbing sponge 15, reducing moisture loss. Simultaneously, the electric cylinder 103 periodically moves the squeezing plate 102, which, in conjunction with the fixing frame 101, squeezes the water-absorbing sponge 15, forcing the moisture inside the sponge 15 into the interior of the protective shell 1. This prevents the moisture inside the protective shell 1 from decreasing, thus ensuring the water-cooling effect on the battery and maintaining the water absorption capacity of the sponge 15. The air duct 14 is a detachable structure, for example, it can be disassembled and reassembled via a threaded connection. The disassembly position of the air duct 14 corresponds to the position of the water-absorbing sponge 15. After disassembling the air duct 14, the water-absorbing sponge 15 can be replaced, ensuring its water absorption effect.

[0051] A method for cooling a battery in an electric motorcycle, using the aforementioned cooling device for a battery in an electric motorcycle, includes the following steps:

[0052] S1. Place the battery inside the protective shell 1 and install it inside the mounting port. The limiting plate 3 contacts the inner wall of the protective shell 1. Connect the cover plate 13 to the top of the protective shell 1 and connect the battery circuit to the electric motorcycle.

[0053] S2. Temperature sensor 9 monitors the temperature inside the protective shell 1. Under normal conditions, the bottom of the battery is immersed in cold water. The air cooler 8 causes air circulation inside the protective shell 1 and air exchange through the ventilation pipe 14.

[0054] S3. When the temperature sensor 9 detects that the temperature has risen to a certain level, it controls the circulation pump 6 to start, drawing cold water from the inside of the protective shell 1 into the heat exchange tube and sending it into the inside of the cold water pipe 4. The cold water in the cold water pipe 4 is sprayed onto the surface of the battery through the atomizing nozzle 5 to cool the battery with water.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery cooling device for an electric motorcycle, comprising a protective shell (1), wherein the battery is located inside the protective shell (1), characterized in that, Multiple heat sinks (2) are fixedly connected to the outside of the protective shell (1). The limiting plate (3) abuts against the inner wall of the protective shell (1). The limiting plate (3) has an installation port for the battery to pass through and multiple ventilation holes. The cold water pipe (4) is located inside the side wall of the protective shell (1). The cold water pipe (4) is connected to an atomizing nozzle (5) for spraying cold water into the interior of the protective shell (1). The inlet of the circulating pump (6) is connected to the bottom of the protective shell (1). The outlet of the circulating pump (6) is connected to the cold water pipe (4); the air cooler (8) is installed on the protective shell (1) to blow gas into the interior of the protective shell (1); the temperature sensor (9) is installed inside the protective shell (1); the outlet of the circulating pump (6) is connected to the cold water pipe (4) through the heat dissipation pipe (10), and multiple heat dissipation fins (11) are fixedly connected to the outside of the heat dissipation pipe (10); the heat dissipation pipe (10) is bent and located on the outside of the protective shell (1); The top of the protective shell (1) is detachably connected to a cover plate (13), and a ventilation pipe (14) is connected to the cover plate (13); an absorbent sponge (15) is installed inside the ventilation pipe (14), and an extrusion component for squeezing the absorbent sponge (15) is provided on the ventilation pipe (14); the extrusion component includes a fixing frame (101), which is fixedly connected to the inside of the ventilation pipe (14); an extrusion plate (102) is movably disposed inside the ventilation pipe (14), and the absorbent sponge (15) is located on the fixing frame (101). 01) and the extrusion plate (102) are in contact, and the extrusion plate (102) and the water-absorbing sponge (15) are in contact; the air exchange pipe realizes the internal and external air exchange of the protective shell, and the high temperature air in the protective shell is discharged. When the air is discharged, the water-absorbing sponge absorbs the water vapor, reducing the water vapor escape. The electric cylinder drives the extrusion plate to move periodically, and cooperates with the fixed frame to squeeze the water-absorbing sponge, squeezing the water in the water-absorbing sponge into the interior of the protective shell, avoiding the reduction of water in the protective shell, and ensuring the water cooling effect of the battery.

2. The battery cooling device for electric motorcycles according to claim 1, characterized in that, The protective shell (1) is fixedly connected to the outside of the protective frame (12), and the heat dissipation pipe (10) is located inside the protective frame (12).

3. The battery cooling device for electric motorcycles according to claim 1, characterized in that, A sealing cover (7) is installed on the top of the battery, and the battery wiring is located inside the sealing cover (7).

4. The battery cooling device for electric motorcycles according to claim 1, characterized in that, Multiple grooves are provided on the inner bottom wall of the protective shell (1).

5. A method for cooling a battery for an electric motorcycle, using the cooling device for a battery for an electric motorcycle as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Place the battery inside the protective shell (1) and install it inside the mounting port. The limiting plate (3) contacts the inner wall of the protective shell (1). Connect the cover plate (13) to the top of the protective shell (1) and connect the battery circuit to the electric motorcycle. S2. Temperature sensor (9) monitors the temperature inside the protective shell (1). Under normal conditions, the bottom of the battery is immersed in cold water. The air cooler (8) generates air circulation inside the protective shell (1) and exchanges air through the ventilation pipe (14). S3. When the temperature sensor (9) senses that the temperature has risen to a certain level, it controls the circulation pump (6) to turn on, drawing cold water from the inside of the protective shell (1) into the heat dissipation pipe and sending it into the inside of the cold water pipe (4). The cold water in the cold water pipe (4) is sprayed onto the surface of the battery through the atomizing nozzle (5) to cool the battery with water.

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