A battery for a golf cart

Abstract

This invention relates to the field of battery pack technology and discloses a battery for golf carts, including a battery box installed on a golf cart. The battery box is divided into multiple battery cavities by a heat dissipation plate, and each battery cavity contains a single battery cell. It also includes an air duct fixed to the outer wall of the battery box, and a cooling cavity is provided inside the battery box. This invention uses an electric telescopic rod to drive a piston plate, creating negative pressure intake and positive pressure exhaust. This allows the warm gas inside the battery cavity to efficiently exchange heat with the cooling pipe and insulating coolant before flowing back, continuously carrying away heat from the battery cells. The fully enclosed structure effectively isolates moisture and dust, improving safety and lifespan. At low temperatures, the coolant is drained and a vacuum is created to achieve heat insulation. During initial startup, the airflow is preheated by heating wires and a heater, rapidly increasing the temperature of the battery cells and delaying capacity decay. Then, the battery's self-heating maintains suitable operating conditions, significantly improving low-temperature range and energy efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a battery for golf carts. Background Technology

[0002] With the development of electrification technology, golf carts have widely adopted lithium-ion batteries as their power source. However, their working environment is mostly outdoor and complex, and they are exposed to high temperature, high humidity, dust and frequent bumps for a long time, which poses a severe challenge to the thermal management and mechanical reliability of the battery system.

[0003] On the one hand, batteries continuously generate heat during charging and discharging. If the heat cannot be dissipated in time, it can easily lead to excessive local temperature rise, accelerating cell aging and even causing thermal runaway. Existing air-cooling or open liquid-cooling solutions are difficult to meet the requirements of efficient heat dissipation and dust and water resistance, and cannot achieve active preheating in low-temperature environments. On the other hand, golf course roads are mostly gravel, grassy slopes, or uneven surfaces. High-frequency micro-vibrations and occasional large impacts generated during vehicle operation coexist. Traditional rigid installations or single damping structures are difficult to balance "high-frequency vibration filtering" and "large impact limiting". If the structure is too soft, it cannot suppress large displacements, leading to tab breakage and loosening of connections. If the structure is too hard, it transmits high-frequency strain, causing cell fatigue damage. Therefore, a battery for golf carts is proposed. Summary of the Invention

[0004] This invention provides a battery for golf carts that uses an electric telescopic rod to drive a piston plate to move, creating negative pressure intake and positive pressure exhaust. This allows the warm gas inside the battery cavity to efficiently exchange heat with the cooling pipe and insulating coolant before flowing back, continuously removing heat from the individual battery cells. The fully enclosed structure effectively isolates moisture and dust, improving safety and lifespan. This invention solves the problem mentioned in the background art that existing air-cooled or open liquid-cooled solutions cannot simultaneously meet the requirements of efficient heat dissipation and dust and water resistance.

[0005] This invention provides the following technical solution: A battery for golf carts includes a battery box installed on the golf cart. The battery box is divided into multiple battery cavities by a heat dissipation plate, and each battery cavity contains a single battery cell. The battery box also includes: an air duct fixed to the outer wall of the battery box; a cooling cavity with multiple cooling pipes installed inside; and an air guide within the air duct that directs airflow from the battery cavity into the cooling pipes and then back into the battery cavity; and a damping limiting part installed in each battery cavity. The damping limiting part limits and fixes the single battery cell while absorbing vibrations experienced by the battery cell during vehicle movement.

[0006] As a preferred embodiment of the present invention, the air guiding section includes an L-shaped sealing plate, which is fixedly connected to the air guiding chamber. The L-shaped sealing plate divides the inner cavity of the air guiding chamber into a piston chamber and a flow guiding chamber. A piston plate is slidably connected to the piston chamber. An electric telescopic rod is fixedly connected to the side wall of the piston chamber. The telescopic end of the electric telescopic rod is fixedly connected to the side wall of the piston plate. Each group of battery chambers and flow guiding chambers are connected through an air intake pipe. The two ends of each group of cooling pipes are respectively connected to the two sides of the flow guiding chamber. Each group of cooling pipes has multiple sets of cooling pipes fixed and connected to it. The output end of each set of cooling pipes is connected to the battery chamber. A one-way valve is provided in both the air intake pipe and the cooling pipe.

[0007] As a preferred embodiment of the present invention, the heat sink is provided with horizontal and vertical guide grooves on both sides, and the top of the heat sink is provided with mounting grooves for consecutive adjacent battery cells on both sides. The battery cells located in the battery cavities on both sides have one side wall attached to the inner wall of the battery cavity and the other side wall attached to the heat sink. The battery cells located in the middle battery cavity have both side walls attached to the heat sink.

[0008] As a preferred embodiment of the present invention, the damping limiting part includes a limiting pressure plate, and at least one set of spring telescopic rods are installed at both ends of the battery cavity. The limiting pressure plate is fixedly connected to the telescopic end of the spring telescopic rod, and the limiting pressure plates on both sides are symmetrically arranged along the center of the battery cavity.

[0009] As a preferred embodiment of the present invention, a sealing chamber is fixedly connected to the outer wall of the battery box, the number of sealing chambers being adapted to the battery cavity, a movable plate is slidably connected inside the sealing chamber, a return spring is fixedly connected between the movable plate and the inner wall of the sealing chamber, the end of the spring telescopic rod near the sealing chamber passes through the cooling cavity and extends into the sealing chamber, a throttling hole is opened on the spring telescopic rod located in the cooling cavity, an adjusting ring is slidably connected to the cavity in which the spring is installed, and multiple sets of push-pull rods are fixedly connected to the side of the adjusting ring near the sealing chamber, the other end of the multiple sets of push-pull rods passes through the sealing chamber and is fixedly connected to the side wall of the movable plate.

[0010] As a preferred embodiment of the present invention, a plurality of limiting guide rods are fixed at equal intervals inside the sealed chamber, and a plurality of friction discs are slidably sleeved on the limiting guide rods, with the sidewalls of the friction discs on adjacent limiting guide rods being in contact with each other, and a low-boiling-point solution is injected into the sealed chamber cavity.

[0011] As a preferred embodiment of the present invention, a first heater and a vibration sensor are fixedly connected to the top of the sealed chamber, and the vibration sensor, the first heater, the limiting guide rod and the battery cell are electrically connected.

[0012] As a preferred embodiment of the present invention, a limiting plate is fixedly connected inside the sealed chamber. In the initial state, the movable plate is attached to the limiting plate, and the distance from the movable plate to the end of the spring telescopic rod is less than the moving distance required for the adjusting ring to completely block the throttling hole.

[0013] As a preferred embodiment of the present invention, the bottom of the cooling cavity is fixed and connected to a liquid guide pipe, an electric heating wire is installed in the flow guide cavity, and a second heater is fixedly connected to the bottom of the air guide chamber. The second heater is electrically connected to the electric heating wire and the battery cell.

[0014] As a preferred embodiment of the present invention, strip-shaped columns are provided on both sides of the battery box, and the inner cavity of the strip-shaped columns is connected to the cooling cavity.

[0015] Compared with the prior art, the present invention provides a battery for golf carts, which has the following advantages: 1. The battery for this golf cart uses an electric telescopic rod to drive the piston plate, creating negative pressure intake and positive pressure exhaust, constructing a closed airflow circulation loop. This allows the warm gas inside the battery cavity to efficiently exchange heat with the cooling pipe and insulating coolant before flowing back, continuously carrying away heat from the individual battery cells. The fully enclosed structure effectively isolates moisture and dust, improving safety and lifespan. At low temperatures, the coolant is drained and a vacuum is created to achieve heat insulation. During the initial startup phase, the airflow is preheated using heating wires and heaters to quickly raise the temperature of the individual battery cells, inhibiting low-temperature lithium plating and delaying capacity decay. During driving, the battery's self-heating is used to maintain suitable operating conditions, significantly improving low-temperature range and energy efficiency.

[0016] 2. The battery for this golf cart utilizes the mechanical damping of the spring telescopic rod and the viscous resistance of the coolant to absorb bumps and vibrations, effectively reducing the vibration energy transmitted to the battery cells. Simultaneously, under large impacts, frictional heat generates heat that vaporizes n-pentane, causing the regulating ring to automatically reduce the inner diameter of the throttling orifice, achieving high-damping "hard" shock absorption, limiting battery displacement, and preventing connection failure. After the impact, the n-pentane condenses and resets, restoring low-damping "soft" shock absorption, avoiding high-frequency micro-strain damage, and balancing energy absorption and heat dissipation, significantly improving the reliability and service life of the battery cells. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0018] Figure 1 This is a three-dimensional model diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the inside of the battery box of the present invention; Figure 4 This is a schematic diagram of the interior of the air-conducting chamber of the present invention; Figure 5 This is a schematic diagram of the vertical cross-sectional structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of region A in the middle; Figure 7 This is a partial cross-sectional schematic diagram of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of region B in the middle.

[0019] In the diagram: 1. Battery box; 2. Heat sink; 3. Battery cell; 4. Air chamber; 41. Cooling pipe; 411. Cooling pipe; 42. Flow guide cavity; 43. Piston cavity; 5. L-shaped sealing plate; 51. Piston plate; 52. Electric telescopic rod; 53. Intake pipe; 6. Limiting pressure plate; 61. Spring telescopic rod; 611. Throttling orifice; 62. Sealing chamber; 63. Moving plate; 64. Adjusting ring; 641. Push-pull rod; 65. Return spring; 66. Limiting guide rod; 661. Friction disc; 67. First heater; 68. Vibration sensor; 69. Limiting plate; 7. Strip column; 8. Liquid guide pipe; 81. Heating wire; 82. Second heater. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Reference Figures 1-8A battery for golf carts includes a battery box 1 installed on the golf cart. The battery box 1 is divided into multiple battery cavities by a heat dissipation plate 2, and each battery cavity contains a single battery cell 3. Strip pillars 7 are provided on both sides of the battery box 1, and the inner cavity of the strip pillars 7 is connected to the battery cavity. The battery box 1 also includes: an air guide chamber 4 fixed to the outer wall of the battery box 1; a cooling cavity is provided inside the battery box 1, filled with an insulating coolant, which may be a glycol-based low-conductivity coolant; multiple cooling pipes 41 are installed in the cooling cavity; and an air guide section is provided in the air guide chamber 4 to guide airflow from the battery cavity into the cooling pipes 41 and then back into the battery cavity; and a damping limiting section installed in each battery cavity, which limits and fixes the single battery cell 3 while absorbing the vibration of the single battery cell 3 during vehicle operation.

[0022] Reference Figure 3 , Figure 4 and Figure 6 The air guiding section includes an L-shaped sealing plate 5, which is fixedly connected inside the air guiding chamber 4. The L-shaped sealing plate 5 divides the inner cavity of the air guiding chamber 4 into a piston chamber 43 and a flow guiding chamber 42, and the piston chamber 43 and the flow guiding chamber 42 are connected. A piston plate 51 is slidably connected inside the piston chamber 43. An electric telescopic rod 52 is fixedly connected to the side wall of the piston chamber 43. The telescopic end of the electric telescopic rod 52 is fixedly connected to the side wall of the piston plate 51. Each battery chamber and the flow guiding chamber 42 are connected through an air intake pipe 53. The two ends of each cooling pipe 41 are connected to the two sides of the flow guiding chamber 42, respectively. Each cooling pipe 41 is fixed and connected to multiple cooling pipes 411. The output end of each cooling pipe 411 is connected to the battery chamber, and the output end of the cooling pipe 411 and the input end of the cooling pipe 41 are located at the two ends of the battery chamber, respectively. A one-way valve is provided inside the air intake pipe 53 and the cooling pipe 41.

[0023] It should be noted that the one-way valve in the intake pipe 53 can only allow gas in the battery cavity to enter the guide cavity 42; the one-way valve in the cooling pipe 41 can only allow gas in the guide cavity 42 to enter the cooling pipe 41 and then be transported to the battery cavity by the cooling pipe 411.

[0024] With the above-described structure, the electric telescopic rod 52 begins to operate. When it retracts the piston plate 51, it increases the volume of the cavity space between the piston chamber 43 and the guide chamber 42. This reduces the air pressure within the cavity space, creating a negative pressure suction effect. This opens the one-way valve in the intake pipe 53, allowing the warm airflow from each battery cavity to enter the guide chamber 42 through the intake pipe 53. Subsequently, when the electric telescopic rod 52 extends the piston plate 51, it compresses the cavity space between the piston chamber 43 and the guide chamber 42, thereby opening the one-way valve in the cooling pipe 41. This allows the drawn-in warm airflow to enter the cooling pipe 41, and... As the warm airflow moves along the cooling pipe 41 toward the intake pipe 53, it effectively exchanges heat with the insulating coolant injected into the cooling cavity, thereby cooling the warm airflow. Finally, the cooled airflow re-enters the battery cavity along the cooling pipe 41, and after passing through the battery cell 3, it enters the guide cavity 42 through the intake pipe 53. This process repeats, achieving airflow circulation and heat exchange, effectively carrying away the heat generated by the battery cell 3. Moreover, the entire heat exchange process is relatively sealed and does not come into contact with the external environment, which can effectively prevent external moisture, dust, etc. from entering the battery cavity and corroding the battery cell 3, thereby improving the service life of the battery cell 3.

[0025] Reference Figure 4 In addition, horizontal and vertical guide grooves are provided on both sides of the heat sink 2. The horizontal and vertical guide grooves are used to guide the heat of the battery cells 3 in a comprehensive manner. The top two sides of the heat sink 2 are provided with mounting grooves for adjacent battery cells 3. The battery cells 3 located in the battery cavities on both sides have one side wall attached to the inner wall of the battery cavity and the other side wall attached to the heat sink 2. The battery cells 3 located in the middle battery cavity have both side walls attached to the heat sink 2. As mentioned above, the battery cells 3 near the sides are attached to the inner wall of the battery cavity for conduction heat dissipation. The battery cells 3 attached to the heat sink 2 can ensure that the heat generated in each part can be guided out by the suction generated in the air pipe 53, thereby avoiding the local heat accumulation of the battery cells 3 and improving the heat dissipation effect.

[0026] Reference Figures 3-8The damping limiting part includes a limiting pressure plate 6. At least one set of spring telescopic rods 61 are installed at both ends of the battery cavity. The limiting pressure plate 6 is fixedly connected to the telescopic end of the spring telescopic rod 61, and the limiting pressure plates 6 on both sides are symmetrically arranged along the center of the battery cavity. When the battery cell 3 is installed into the battery cavity, the spring telescopic rods 61 on both sides are in a compressed state. In this way, the rebound force is used to effectively fix the battery cell 3. The spring telescopic rods 61 have an appropriate elastic margin and will not cause the battery cell 3 to move within a large range. In this way, while effectively reducing shock, it can also prevent the connection point of the battery cell 3 from being damaged. This generates significant tension to prevent contact failure and ensure the stability of the battery cell 3 connection point. A sealing chamber 62 is fixedly connected to the outer wall of the battery box 1. The number of sealing chambers 62 matches the battery cavity. A movable plate 63 is slidably connected inside the sealing chamber 62. A return spring 65 is fixedly connected between the movable plate 63 and the inner wall of the sealing chamber 62. The end of the spring telescopic rod 61 near the sealing chamber 62 penetrates the cooling cavity and extends into the sealing chamber 62. A throttling orifice 611 is opened on the spring telescopic rod 61 located inside the cooling cavity. The throttling orifice 611 is located between the telescopic end of the spring telescopic rod 61 and its internal spring, and when… When the telescopic end retracts to its maximum state, the telescopic end of the spring telescopic rod 61 will not exceed the throttling orifice 611, thus ensuring that the coolant in the cooling chamber will not overflow. An adjusting ring 64 is slidably connected inside the spring telescopic rod 61 within the spring housing. Multiple sets of push-pull rods 641 are fixedly connected to the side of the adjusting ring 64 near the sealing chamber 62. The other ends of the multiple sets of push-pull rods 641 penetrate into the sealing chamber 62 and are fixedly connected to the side wall of the moving plate 63. Multiple sets of limiting guide rods 66 are fixedly fixed at equal intervals inside the sealing chamber 62. Multiple sets of friction discs 661 are slidably sleeved on the limiting guide rods 66. The friction discs 661 are made of carbon fiber with a high coefficient of friction. Made of fiber composite material, the friction discs 661 on adjacent limiting guide rods 66 are in contact with each other. The sealed chamber 62 is filled with a low-boiling-point solution, such as n-pentane liquid, and nitrogen is introduced into the sealed chamber 62 to remove internal air and maintain pre-pressure to prevent the n-pentane liquid from condensing and forming a vacuum that could cause structural collapse, and to mitigate vaporization impact and improve safety. A limiting plate 69 is fixedly connected inside the sealed chamber 62. In the initial state, the moving plate 63 is attached to the limiting plate 69, and the distance from the moving plate 63 to the end of the spring telescopic rod 61 is less than the distance required for the adjusting ring 64 to completely block the throttle orifice 611. With the above-described structure, when the battery box 1 is subjected to bumps during vehicle operation, the vibration is transmitted to the battery cells 3 through the battery box 1 and the spring telescopic rod 61. At this time, the damping effect generated by the piston and spring inside the spring telescopic rod 61 absorbs most of the vibration energy. Furthermore, the spring telescopic rod 61 also undergoes slight extension and retraction while absorbing vibration, which applies pressure to the coolant entering its cavity. The viscous resistance within the coolant also absorbs some of the vibration energy, effectively reducing the vibration transmitted to the battery cells 3. This achieves effective, reliable, and safe energy absorption and vibration damping, reducing vibration damage to the battery cells 3 on bumpy roads. Moreover, during the slight extension and retraction of the spring telescopic rod 61, coolant continuously enters and exits its cavity, achieving localized heat exchange between coolants and improving heat dissipation. Additionally, when the vehicle experiences significant bumps, multiple friction discs 661 continuously slide and rub along the limiting guide rod 66, and adjacent friction discs 661 also rub against each other. The generated frictional heat is absorbed by the n-pentane liquid injected into the sealed chamber 62. At this time, some of the n-pentane liquid will vaporize, thereby increasing the gas pressure inside the sealed chamber 62. This pushes the moving plate 63 to move towards the side of the compression return spring 65, which in turn pushes the adjusting ring 64 towards the throttling orifice 611 through the push-pull rod 641. This partially blocks the throttling orifice 611, reducing the flow diameter of the throttling orifice 611. At this time, the flow rate decreases, and the resistance generated increases significantly, thereby quickly dissipating the impact energy and achieving high-damping "hard" reduction. The vibration restricts the displacement of the battery cell 3, preventing the connection of the battery cell 3 from breaking. Subsequently, when the vehicle moves smoothly or stops, the temperature inside the sealed chamber 62 will gradually decrease, and eventually the n-pentane liquid will re-liquefy. Under the rebound action of the return spring 65, the adjusting ring 64 will be reset, realizing low-damping "soft damping". This avoids the battery cell 3 from being subjected to high-frequency micro-strain. In summary, dynamic damping that is "hard when it should be hard and soft when it should be soft" is achieved, effectively protecting the battery cell 3 and improving its service life.

[0027] Reference Figure 3 , Figure 7 In addition, a first heater 67 and a vibration sensor 68 are fixedly connected to the top of the sealed chamber 62. The limiting guide rod 66 is made of a high resistivity nickel-chromium alloy material. The vibration sensor 68, the first heater 67, the limiting guide rod 66 and the battery cell 3 are electrically connected. In order to avoid insufficient frictional heat to vaporize the n-pentane liquid, the first heater 67 and the vibration sensor 68 are introduced. When the vibration sensor 68 detects that the vibration intensity is too large, it will control the first heater 67 to heat the limiting guide rod 66. The electric auxiliary heating helps the n-pentane liquid to vaporize smoothly.

[0028] Reference Figure 3 , Figure 4The bottom of the cooling chamber is fixed and connected to a liquid guide pipe 8. A heating wire 81 is installed inside the flow guide chamber 42. A second heater 82 is fixedly connected to the bottom of the air guide chamber 4. The second heater 82 is electrically connected to the heating wire 81 and the battery cell 3.

[0029] Reference Figures 1-8 In this invention, when multiple battery cells 3 provide power, they release a significant amount of heat within the battery box 1. At this time, the electric telescopic rod 52 begins to operate. When it retracts the piston plate 51, it increases the volume of the cavity space between the piston chamber 43 and the guide chamber 42. This reduces the air pressure within the cavity space, creating a negative pressure suction effect. This opens the one-way valve in the suction pipe 53, allowing the warm airflow from each battery cell cavity to enter the guide chamber 42 along the suction pipe 53. Subsequently, when the electric telescopic rod 52 extends the piston plate 51, it compresses the cavity space between the piston chamber 43 and the guide chamber 42, thereby opening the one-way valve in the cooling pipe 41, allowing the drawn-in warm airflow to escape. Hot air enters the cooling pipe 41 and, as it moves along the cooling pipe 41 toward the suction pipe 53, it effectively exchanges heat with the insulating coolant injected into the cooling chamber, thus cooling the hot air. The cooled air then re-enters the battery chamber along the cooling pipe 41, passes through the battery cell 3, and then enters the guide chamber 42 through the suction pipe 53. This process repeats, achieving airflow circulation and heat exchange, effectively removing the heat generated by the battery cell 3. The entire heat exchange process is relatively sealed and does not come into contact with the external environment, effectively preventing external moisture, dust, etc., from entering the battery chamber and corroding the battery cell 3, thereby improving the service life of the battery cell 3.

[0030] Furthermore, when the battery pack 1 experiences bumps during vehicle operation, the vibration is transmitted to the individual battery cells 3 via the battery pack 1 and the spring telescopic rod 61. The damping effect generated by the piston and spring inside the spring telescopic rod 61 absorbs most of the vibration energy. The spring telescopic rod 61 also undergoes slight extension and retraction while absorbing vibration, applying pressure to the coolant entering its cavity. The viscous resistance of the coolant further absorbs some of the vibration, effectively reducing the vibration transmitted to the individual battery cells 3. This achieves effective, reliable, and safe energy absorption and shock absorption, reducing vibration damage to the individual battery cells 3 on bumpy roads. Moreover, during the slight extension and retraction of the spring telescopic rod 61, coolant continuously enters and exits its cavity, achieving localized heat exchange between coolant particles and improving heat dissipation. Additionally, when the vehicle experiences significant bumps, multiple friction discs 661 continuously slide and rub along the limiting guide rod 66, and adjacent friction discs 661 also rub against each other, generating… The frictional heat is absorbed by the n-pentane liquid injected into the sealed chamber 62. At this time, some of the n-pentane liquid will vaporize, thereby increasing the gas pressure inside the sealed chamber 62. This pushes the moving plate 63 to the side of the compression return spring 65, which in turn pushes the adjusting ring 64 towards the throttling orifice 611 via the push-pull rod 641. This partially blocks the throttling orifice 611, reducing its flow diameter. As a result, the flow rate decreases, and the resistance generated increases significantly, thereby rapidly dissipating the impact energy and achieving high-damping "hard" shock absorption. The displacement of the battery cell 3 is limited to prevent the connection of the battery cell 3 from breaking. Subsequently, when the vehicle moves smoothly or stops, the temperature inside the sealed chamber 62 will gradually decrease, and eventually the n-pentane liquid will re-liquefy. Under the rebound action of the return spring 65, the adjusting ring 64 will be reset, realizing low-damping "soft shock absorption". This avoids the battery cell 3 from being subjected to high-frequency micro-strain. In summary, dynamic shock absorption that is "hard when it should be hard and soft when it should be soft" is achieved, which effectively protects the battery cell 3 and improves the service life of the battery cell 3.

[0031] In addition, in cold weather, the insulating coolant in the cooling cavity is discharged through the liquid guide pipe 8, and the cooling cavity is evacuated to a relative vacuum state using an air pump, thereby reducing the heat conduction effect and achieving heat insulation for the battery cell 3. At the initial stage of vehicle stopping or starting, the airflow in the guide cavity 42 can be heated by the second heater 82 in conjunction with the heating wire 81, and the operation of the electric telescopic rod 52 can push the low-heat airflow into the battery cavity to preheat the battery cell 3, ensuring that the battery cavity maintains a relatively suitable operating temperature for the battery cell 3 in cold weather, delaying its capacity decay, extending the cycle life of the battery cell 3, improving the operating efficiency of the battery cell 3, and increasing the driving range per unit of electricity. After the vehicle has been driven for a period of time, the heating is turned off, and the self-generated heat of the battery cell 3 is used for heat insulation, and the excess heat is discharged through the heat conduction of the battery box 1, thereby effectively improving the vehicle's range in low-temperature environments.

[0032] Components not described in detail in this article are existing technologies.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery for golf carts, comprising a battery box (1) mounted on a golf cart, characterized in that, The battery box (1) is divided into multiple battery cavities by a heat sink (2), and each battery cavity contains a single battery cell (3). It also includes: Air guide chamber (4), the air guide chamber (4) is fixed on the outer wall of battery box (1), The battery box (1) has a cooling chamber inside, and multiple cooling pipes (41) are installed inside the cooling chamber. The air guide chamber (4) is provided with an air guide section that guides the airflow in the battery chamber into the cooling pipes (41) and then back into the battery chamber. The damping limiting part is installed in each battery cavity. The damping limiting part is used to limit and fix the battery cell (3) while absorbing the vibration of the battery cell (3) during vehicle operation.

2. The battery for a golf cart according to claim 1, characterized in that, The air guiding section includes an L-shaped sealing plate (5), which is fixedly connected inside the air guiding chamber (4). The L-shaped sealing plate (5) divides the inner cavity of the air guiding chamber (4) into a piston chamber (43) and a flow guiding chamber (42). A piston plate (51) is slidably connected inside the piston chamber (43). An electric telescopic rod (52) is fixedly connected to the side wall of the piston chamber (43). The telescopic end of the electric telescopic rod (52) is connected to the piston plate (51). The side walls are fixedly connected, and each group of battery chambers and the flow guide chamber (42) are connected through the air intake pipe (53). The two ends of each group of cooling pipes (41) are respectively connected to the two sides of the flow guide chamber (42). Each group of cooling pipes (41) is fixed and connected to multiple groups of cooling pipes (411). The output end of each group of cooling pipes (411) is connected to the battery chamber. And the air intake pipe (53) and the cooling pipe (41) are both equipped with one-way valves.

3. A battery for golf carts according to claim 1, characterized in that... The heat sink (2) has horizontal and vertical guide grooves on both sides, and the top of the heat sink (2) has mounting grooves for consecutive adjacent battery cells (3) on both sides. The battery cells (3) located in the battery cavities on both sides have one side wall attached to the inner wall of the battery cavity, and the other side wall attached to the heat sink (2). The battery cell (3) located in the middle battery cavity has its two side walls attached to the heat sink (2).

4. A battery for golf carts according to claim 1, characterized in that, The damping limiting part includes a limiting pressure plate (6), and at least one set of spring telescopic rods (61) are installed at both ends of the battery cavity. The limiting pressure plate (6) is fixedly connected to the telescopic end of the spring telescopic rod (61), and the limiting pressure plates (6) on both sides are symmetrically arranged along the center of the battery cavity.

5. A battery for golf carts according to claim 4, characterized in that, A sealing chamber (62) is fixedly connected to the outer wall of the battery box (1). The number of sealing chambers (62) is adapted to the battery cavity. A moving plate (63) is slidably connected inside the sealing chamber (62). A return spring (65) is fixedly connected between the moving plate (63) and the inner wall of the sealing chamber (62). The end of the spring telescopic rod (61) near the sealing chamber (62) passes through the cooling cavity and extends into the sealing chamber (62). A throttling hole (611) is opened on the spring telescopic rod (61) located in the cooling cavity. An adjusting ring (64) is slidably connected to the cavity in which the spring is installed on the spring telescopic rod (61). Multiple sets of push-pull rods (641) are fixedly connected to the side of the adjusting ring (64) near the sealing chamber (62). The other end of the multiple sets of push-pull rods (641) passes through the sealing chamber (62) and is fixedly connected to the side wall of the moving plate (63).

6. A battery for golf carts according to claim 5, characterized in that, Multiple sets of limiting guide rods (66) are fixed at equal intervals inside the sealed chamber (62). Multiple sets of friction discs (661) are slidably sleeved on the limiting guide rods (66), and the side walls of the friction discs (661) on adjacent limiting guide rods (66) are in contact with each other. A low-boiling-point solution is injected into the cavity of the sealed chamber (62).

7. A battery for golf carts according to claim 6, characterized in that, The top of the sealed chamber (62) is fixedly connected to a first heater (67) and a vibration sensor (68), and the vibration sensor (68), the first heater (67), the limiting guide rod (66) and the battery cell (3) are electrically connected.

8. A battery for golf carts according to claim 5, characterized in that, The sealing chamber (62) is fixedly connected to a limiting plate (69). In the initial state, the moving plate (63) is attached to the limiting plate (69), and the distance from the moving plate (63) to the end of the spring telescopic rod (61) is less than the moving distance required for the adjusting ring (64) to completely block the throttle hole (611).

9. A battery for golf carts according to claim 2, characterized in that, The bottom of the cooling chamber is fixed and connected to a liquid guide pipe (8). A heating wire (81) is installed inside the flow guide chamber (42). A second heater (82) is fixedly connected to the bottom of the air guide chamber (4). The second heater (82) is electrically connected to the heating wire (81) and the battery cell (3).

10. A battery for golf carts according to claim 1, characterized in that, Both sides of the battery box (1) are provided with strip columns (7), and the inner cavity of the strip columns (7) is connected to the cooling cavity.

Images