Golf cart power supply

Abstract

The utility model provides a golf cart power supply, which relates to the technical field of energy storage power supplies and comprises a battery shell, a battery assembly and a fixing frame assembly. The battery shell is provided with an input interface and an output interface; the fixing frame assembly comprises a first fixing base, a second fixing base and fixing plates, the first fixing base and the second fixing base are arranged at the two ends of the battery assembly respectively and flush with the bottom of the battery assembly, the fixing plates are arranged at the two ends of the battery module, and the battery module is fixedly connected with the fixing plates at the two ends. The fixed plate is fixed on the first fixed base or the second fixed base; a fixing seat is arranged on the fixing plate, first connecting pieces are fixed on the fixing seat, and the input interface and the output interface are electrically connected with the battery assembly through the first connecting pieces respectively. The fixing plates at the two ends of the battery module are connected with the corresponding fixing bases respectively, and the structure that the bases are flush with the bottom of the battery assembly is matched, so that the stability of the battery module in the running process of the golf cart is guaranteed, and loosening or displacement is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage power supplies, in particular to a golf cart power supply. Background Art

[0002] Golf courses have complex terrain, and golf carts often encounter bumps and vibrations during driving. This places high demands on the on-board power system, especially the fixation and stability of the battery components.

[0003] Traditional battery fixing methods mainly rely on simple brackets or straps. Under severe bumps and vibrations, battery components are prone to loosening, displacement, or even falling off, which not only affects the normal operation of the power system but may also cause safety accidents.

[0004] Therefore, it is necessary to improve the existing golf cart power supply to overcome the defects of the prior art. Utility Model Content

[0005] To overcome the problems existing in the related art, the present invention aims to provide a golf cart power supply that achieves multi-point fixation of the battery module through a fixing frame assembly, a fixing seat, and a first connecting piece, thereby resolving the problem of insufficient stability of the battery module fixing method in the prior art.

[0006] A golf cart power supply, comprising:

[0007] A battery housing, wherein the battery housing is provided with an input interface and an output interface;

[0008] A battery assembly disposed in the battery housing, the battery assembly comprising at least one battery module;

[0009] A fixing frame assembly, the fixing frame assembly comprising a first fixing base, a second fixing base, and a fixing plate, the first fixing base and the second fixing base being respectively provided at both ends of the battery assembly and flush with the bottom of the battery assembly, the fixing plates being provided at both ends of the battery module, the battery module being fixedly connected to the fixing plates at both ends, and the fixing plates being fixed to the first fixing base or the second fixing base;

[0010] A fixing seat is provided on the fixing plate, a first connecting piece is fixed on the fixing seat, and the input interface and the output interface are electrically connected to the battery assembly through each of the first connecting pieces.

[0011] The battery housing provides physical protection for the internal components, preventing external impact, water splashes, and dust intrusion, thereby improving the durability and reliability of the power supply. The mounting bracket assembly ensures that the battery module remains stable during golf cart driving, especially on bumpy roads, preventing loosening or displacement, further enhancing safety. The first connecting piece connects the battery assembly to the input and output ports, providing a stable current path and ensuring reliable circuit connection.

[0012] Preferably, a BMS fixing frame is provided on the first fixing base, the BMS fixing frame is fixed on the first fixing base, a BMS board is fixed on the BMS fixing frame, and the BMS board is electrically connected to the battery assembly.

[0013] The BMS mounting bracket not only provides a dedicated mounting location for the BMS board, ensuring its stability and reliability, but also places it closer to the battery pack. This close installation shortens the cable length between the BMS and the battery, reducing energy loss and voltage drop caused by cable resistance. This improves the accuracy and speed of the BMS in collecting battery data and executing control commands. Furthermore, shorter cables reduce the potential for electromagnetic interference, enhancing the stability and reliability of the BMS, and helping to prolong battery life and improve safety.

[0014] Preferably, the battery module includes a plurality of square battery cells, the connection terminals of the plurality of square battery cells face upward and are connected in series, and a first protective plate is provided between the two ends of the battery module and the square battery cells.

[0015] The use of prismatic cells, with their regular geometry, allows for more efficient use of the battery module's internal space, increasing the pack's volumetric energy density. This allows for greater energy storage within a limited space, extending the golf cart's range. The cells are connected in series, allowing the voltages of each cell to be combined, resulting in a higher total voltage output to meet the golf cart's motor drive requirements. Furthermore, a first protective plate is placed between the cells to effectively isolate adjacent cells, preventing short circuits caused by cell expansion, deformation, or other unexpected conditions, thereby enhancing the safety of the battery module.

[0016] Preferably, a second protective plate is provided at the bottom of the battery module, a third protective plate is provided at the top of the battery module, through holes are provided on the third protective plate corresponding to the terminal ends of the square battery cells, and the third protective plate is in contact with the square battery cells.

[0017] The second protective plate at the bottom of the battery module provides an additional layer of physical protection, effectively resisting impact, scratches, and abrasion from the road or other external forces, preventing damage to the bottom of the battery module. The third protective plate and through-hole design at the top of the battery module ensure that the battery cell terminals can be properly connected while effectively preventing dust, foreign matter, and moisture from entering the battery module, thereby avoiding short circuits or other failures caused by these factors. The through-holes correspond to the location of the battery cell terminals, ensuring convenient connection while minimizing the open area, thereby improving the protection level and safety performance of the battery module.

[0018] Preferably, a protective frame is further provided on the top of the battery module, and the protective frame is arranged along the length direction of the battery module. The protective frame is U-shaped, and both sides of the U-shaped opening of the protective frame are fixed to the battery module. A gap is provided between the protective frame and the terminal of the square battery cell.

[0019] The U-shaped protective frame design, in addition to the third protective plate, further enhances the protection of the battery cell terminals. The U-shaped structure effectively disperses external impact forces. Even in the event of an accidental collision or extrusion, it minimizes direct impact on the battery cell terminals, preventing deformation or breakage, thereby reducing the risk of short circuits and fires and improving battery module safety. The U-shaped opening also facilitates installation and maintenance.

[0020] Preferably, a fixing groove is provided at the bottom of the first fixing base and / or the second fixing base, and a limiting column is provided on the battery housing corresponding to the fixing groove, and the limiting column is snapped into the fixing groove.

[0021] The combination of the fixing slots and limiting posts simplifies the installation process and improves installation accuracy. By inserting the limiting posts into the fixing slots, the fixing base can be quickly and accurately positioned at the predetermined position on the battery housing, eliminating human error and improving installation efficiency. The snap-on connection also strengthens the connection between the fixing base and the battery housing, ensuring the stability of the fixing base and preventing the battery module from loosening or shifting, even during severe vibrations during the caddy's operation.

[0022] Preferably, a bayonet is provided on the top of the fixing plate, and a clamping block corresponding to the bayonet is provided on the bottom of the fixing seat, and the clamping block is fixed to the bayonet.

[0023] The combination of the bayonet and the clamp allows the mounting base to be quickly and conveniently snapped into the mounting plate, achieving a secure connection. This simplifies the assembly and maintenance of the power supply, improving efficiency. It also provides sufficient connection strength and stability, ensuring connection reliability.

[0024] Preferably, the battery assembly includes two battery modules, the two battery modules are arranged in parallel, the two battery modules are connected by a second connecting piece, and the second connecting piece is fixedly connected to the fixing plate by the fixing seat.

[0025] Using a second connecting piece and connecting it to the fixing base via a clamp ensures a secure connection, preventing loose connections that could cause poor contact or current imbalance. This connection method also makes installation and removal of the battery module easier, simplifying maintenance.

[0026] Preferably, at least one semiconductor refrigeration plate is embedded in the second protective plate, the semiconductor refrigeration plate is electrically connected to the BMS board, the cold end of the semiconductor refrigeration plate is thermally connected to the second protective plate, a heat sink is provided on the hot end of the semiconductor refrigeration plate, and the semiconductor refrigeration plate and the heat sink are connected by a heat-conducting material.

[0027] Semiconductor cooling sheets embedded in the second protective plate enable active cooling of the battery module. The semiconductor cooling sheets rapidly transfer heat generated by the battery module to the heat sink, which then dissipates it into the surrounding environment, effectively reducing battery temperature, especially in high-temperature environments or under high-load conditions. This not only improves battery performance and cycle life, but also effectively prevents thermal runaway and safety incidents caused by battery overheating, significantly enhancing the safety of the power system.

[0028] Preferably, a cavity filled with a heat-conducting fluid is provided inside the battery housing, the battery module is immersed or partially immersed in the heat-conducting fluid, the heat-conducting fluid is thermally connected to the battery housing, and the heat-conducting fluid is mineral oil or synthetic oil.

[0029] The cavity design, filled with thermally conductive fluid, provides an efficient heat dissipation environment for the battery module. Because the liquid is in full contact with the battery module surface, it absorbs and transfers heat more effectively than air, allowing heat to be quickly and evenly transferred from the battery module to the thermally conductive fluid. Through the thermally conductive fluid, the heat is carried to the battery casing and ultimately dissipated into the environment. Immersion cooling effectively controls battery temperature, prevents localized overheating, improves battery consistency and lifespan, and enhances the safety and reliability of the power system.

[0030] The beneficial effects of the utility model are:

[0031] The utility model provides a golf cart power supply, which includes a battery housing, a battery assembly, a fixing frame assembly and a first connecting piece. The battery housing provides necessary physical protection for the internal components to prevent damage from external environmental factors. The internal battery assembly is composed of at least one battery module to provide power for the golf cart. The fixing frame assembly includes a first fixing base, a second fixing base and a fixing plate to fix the battery module in the battery housing. The fixing plates at both ends of the battery module are respectively connected to the corresponding fixing bases. This multi-point fixing design, combined with the structure in which the base is flush with the bottom of the battery assembly, not only ensures the stability of the battery module under various working conditions, but also effectively disperses shock and vibration, ensuring that the battery module can remain stable during the driving of the golf cart, especially on bumpy roads, to avoid loosening or displacement, thereby further improving safety. In addition, the design of the fixing base and the first connecting piece on the fixing plate realizes the connection between the battery assembly and the external input and output interface, provides a stable current path, and ensures the reliability of the circuit connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of the golf cart power supply provided in Example 1 of the present application;

[0033] Figure 2 is an internal schematic diagram of the golf cart power supply provided in Example 1 of the present application;

[0034] Figure 3 This is a schematic diagram of the interior of the golf cart power supply provided in Example 1 of the present application with the protective frame removed;

[0035] Figure 4 is a schematic diagram of the first fixed base side of the golf cart power supply provided in Example 1 of the present application;

[0036] Figure 5 yes Figure 4 AA cross-section of

[0037] Figure 6 This is a schematic diagram of the first fixed base and fixed plate of the fixing frame assembly provided in Example 1 of the present application.

[0038] Reference numerals:

[0039] 100, battery housing; 110, input interface; 120, output interface; 130, limit column;

[0040] 200, battery module; 210, square battery cell; 220, first protection plate; 230, second protection plate; 240, third protection plate; 260, protection frame;

[0041] 300, fixing frame assembly; 310, first fixing base; 320, second fixing base; 330, fixing plate; 331, bayonet; 340, fixing seat; 341, clamping block; 350, fixing slot;

[0042] 400, first connecting piece;

[0043] 500, BMS fixing bracket; 510, BMS board;

[0044] 600. Second connecting piece. DETAILED DESCRIPTION

[0045] The following describes preferred embodiments of the present invention in more detail with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0046] Example 1

[0047] like Figures 1-6 As shown, this embodiment provides a golf cart power supply, which includes:

[0048] A battery housing 100 , wherein the battery housing 100 is provided with an input interface 110 and an output interface 120 ;

[0049] Specifically, the battery housing 100 can be made of high-strength, impact-resistant engineering plastics or metal materials, such as ABS engineering plastics, polycarbonate (PC) or aluminum alloy, to provide sufficient strength and durability to protect internal components from external environments such as rain, dust, and impact.

[0050] More specifically, an input interface 110 and an output interface 120 are provided on the top or side of the battery housing 100 for connecting to a charger and a motor controller of the golf cart.

[0051] More specifically, the input interface 110 and the output interface 120 may use waterproof and dustproof connectors, such as aviation plugs, to ensure the reliability and safety of the connection.

[0052] A battery assembly disposed in the battery housing 100 , the battery assembly including at least one battery module 200 ;

[0053] Specifically, the battery module 200 includes a plurality of square battery cells 210 , the connection terminals of the plurality of square battery cells 210 are facing upward and connected in series, and a first protection plate 220 is provided between the two ends of the battery module 200 and the square battery cells 210 .

[0054] More specifically, a second protective plate 230 is provided at the bottom of the battery module 200, and a third protective plate 240 is provided at the top of the battery module 200. The third protective plate 240 is provided with a through hole corresponding to the connection terminal of the square battery cell 210, and the third protective plate 240 is in contact with the square battery cell 210.

[0055] More specifically, a protective frame 260 is further provided on the top of the battery module 200. The protective frame 260 is arranged along the length direction of the battery module 200. The protective frame 260 is U-shaped. The two sides of the U-shaped opening of the protective frame 260 are fixed to the battery module 200. A gap is provided between the protective frame 260 and the terminal of the square battery cell 210.

[0056] More specifically, the first, second, and third protection plates 240 and the protection frame 260 may be made of insulating, flame-retardant, and impact-resistant materials, such as PC or ABS engineering plastics.

[0057] More specifically, it includes two battery modules 200 connected in series. Each battery module 200 is composed of multiple prismatic lithium-ion cells connected in series. Prismatic cells 210 were chosen because their regular shape improves space utilization and simplifies the assembly process of the battery modules 200. The cell specifications are selected based on the specific needs of the golf cart.

[0058] A fixing frame assembly 300, comprising a first fixing base 310, a second fixing base 320, and a fixing plate 330. The first fixing base 310 and the second fixing base 320 are respectively disposed at both ends of the battery assembly and are flush with the bottom of the battery assembly. The fixing plates 330 are disposed at both ends of the battery module 200. The battery module 200 is fixedly connected to the fixing plates 330 at both ends. The fixing plates 330 are fixed to the first fixing base 310 or the second fixing base 320.

[0059] Specifically, the fixing plates 330 are mounted on both ends of the battery module 200 and fix the battery module 200 to the base. The fixing plates 330 and the base can be fixed by bolt connection, riveting or other reliable connection methods.

[0060] Furthermore, a BMS fixing frame 500 is provided on the first fixing base 310 , and the BMS fixing frame 500 is fixed on the first fixing base 310 . A BMS board 510 is fixed on the BMS fixing frame 500 , and the BMS board 510 is electrically connected to the battery assembly.

[0061] Specifically, the BMS board 510 is connected to the battery module 200 and is used to monitor the battery status, control the charging and discharging process, and provide various protection functions.

[0062] More specifically, a fixing groove 350 is provided at the bottom of the first fixing base 310 and / or the second fixing base 320. A limiting post 130 is provided on the battery housing 100 corresponding to the fixing groove 350. The limiting post 130 is snapped into the fixing groove 350. By inserting the fixing groove 350 into the limiting post 130, the fixing frame assembly 300 can be quickly and accurately installed in the battery housing 100.

[0063] A fixing base 340 is provided on the fixing plate 330 , and a first connecting piece 400 is fixed on the fixing base 340 . The input interface 110 and the output interface 120 are electrically connected to the battery assembly via each of the first connecting pieces 400 .

[0064] Furthermore, a bayonet 331 is provided on the top of the fixing plate 330 , and a clamping block 341 corresponding to the bayonet 331 is provided on the bottom of the fixing seat 340 . The clamping block 341 is clamped and fixed to the bayonet 331 .

[0065] Furthermore, the battery assembly includes two battery modules 200, the two battery modules 200 are arranged in parallel, the two battery modules 200 are connected by a second connecting piece 600, and the second connecting piece 600 is fixedly connected to the fixing plate 330 via the fixing seat 340.

[0066] More specifically, a fixing base 340 is provided on the fixing plate 330 for securing the first and second connecting plates 600. The first connecting plate 400 is secured to the fixing base 340 and connects the battery module 200 to the input port 110 and the output port 120. The two battery modules 200 are connected in series via the second connecting plate 600, which is also secured to the fixing base 340. The first and second connecting plates 600 can be made of a highly conductive material, such as copper or aluminum, to minimize energy loss.

[0067] To further improve the reliability and convenience of the connection, the top of the fixing plate 330 can be designed as a bayonet 331 structure, and the connecting piece is fixed by a matching clamp 341 to achieve a quick plug-in connection. More specifically, the bayonet 331 and the clamp 341 are shaped like a "convex" character.

[0068] The golf cart power supply provided in this embodiment achieves multi-point fixation of the battery module 200 through the coordinated use of the first fixed base 310, the second fixed base 320, and the fixed plate 330, thereby enhancing the stability of the battery assembly and effectively preventing loosening and displacement during driving. The design of the base being flush with the bottom of the battery assembly further lowers the center of gravity of the power supply and improves the driving stability of the golf cart. The design of the limiting column 130 and the fixing groove 350 simplifies the installation process of the fixing frame assembly 300 and improves installation efficiency and accuracy. The design of the multi-layer protective plate and the U-shaped protective frame 260 comprehensively protects the battery cells and terminals, effectively preventing short circuits and impact damage, and improving the safety of the battery module 200.

[0069] Example 2

[0070] like Figures 1-6 As shown, this embodiment provides a golf cart power supply, which includes:

[0071] A battery housing 100 , wherein the battery housing 100 is provided with an input interface 110 and an output interface 120 ;

[0072] A battery assembly disposed in the battery housing 100 , the battery assembly including at least one battery module 200 ;

[0073] A fixing frame assembly 300, comprising a first fixing base 310, a second fixing base 320, and a fixing plate 330. The first fixing base 310 and the second fixing base 320 are respectively disposed at both ends of the battery assembly and are flush with the bottom of the battery assembly. The fixing plates 330 are disposed at both ends of the battery module 200. The battery module 200 is fixedly connected to the fixing plates 330 at both ends. The fixing plates 330 are fixed to the first fixing base 310 or the second fixing base 320.

[0074] A fixing base 340 is provided on the fixing plate 330 , and a first connecting piece 400 is fixed on the fixing base 340 . The input interface 110 and the output interface 120 are electrically connected to the battery assembly via each of the first connecting pieces 400 .

[0075] A BMS fixing frame 500 is provided on the first fixing base 310 . The BMS fixing frame 500 is fixed on the first fixing base 310 . A BMS board 510 is fixed on the BMS fixing frame 500 . The BMS board 510 is electrically connected to the battery assembly.

[0076] The battery module 200 includes a plurality of square battery cells 210 . The connection terminals of the plurality of square battery cells 210 face upward and are connected in series. A first protection plate 220 is provided between the two ends of the battery module 200 and the square battery cells 210 .

[0077] A second protection plate 230 is provided at the bottom of the battery module 200 , and a third protection plate 240 is provided at the top of the battery module 200 . Through holes are provided on the third protection plate 240 corresponding to the connection terminals of the square battery cells 210 , and the third protection plate 240 is in contact with the square battery cells 210 .

[0078] At least one semiconductor refrigeration chip is embedded in the second protective plate 230. The semiconductor refrigeration chip is electrically connected to the BMS board 510. The cold end of the semiconductor refrigeration chip is thermally connected to the second protective plate 230. A heat sink is provided on the hot end of the semiconductor refrigeration chip. The semiconductor refrigeration chip and the heat sink are connected by a thermally conductive material.

[0079] Specifically, at least one semiconductor refrigeration plate is embedded in the second protective plate 230, and its cold end is in close contact with the second protective plate 230, effectively absorbing the heat generated by the battery module 200. The hot end of the semiconductor refrigeration plate is connected to the heat sink through a thermally conductive material. Thermally conductive materials, such as thermal grease or thermal pads, can effectively fill the gap between the semiconductor refrigeration plate and the heat sink, reduce contact thermal resistance, and improve the efficiency of heat transfer. The heat sink can be designed to be fin-shaped or other shapes with a large surface area to enhance the heat dissipation effect. The heat sink can dissipate heat through natural convection, or with a fan for forced air cooling to further improve the heat dissipation efficiency.

[0080] More specifically, the operating status of the semiconductor cooler is controlled by the BMS board 510. Based on the readings from the battery temperature sensor, the BMS board 510 adjusts the power of the semiconductor cooler in real time to achieve precise temperature control. When the battery temperature exceeds a preset threshold, the BMS activates the semiconductor cooler for cooling. When the battery temperature falls below the threshold, the BMS shuts down or reduces the power of the semiconductor cooler to conserve energy.

[0081] The golf cart power supply provided in this embodiment integrates a semiconductor cooling chip and BMS control to achieve active cooling of the battery module 200, effectively controlling battery temperature and preventing overheating. Preventing battery overheating can significantly extend the battery's cycle life and reduce the frequency and cost of battery replacement. Active cooling can effectively prevent thermal runaway, reduce the risk of fire, and improve the safety of the power supply system.

[0082] Unless otherwise specifically stated, the relative arrangement, numerical expression and numerical value of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that: similar reference numerals and letters represent similar items in the accompanying drawings below, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the accompanying drawings subsequently.

[0083] In addition, it should be noted that the use of terms such as "first" and "second" for limitation is only for the convenience of distinction. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A golf cart power supply, characterized in that: include: A battery housing (100), wherein the battery housing (100) is provided with an input interface (110) and an output interface (120); A battery assembly disposed in the battery housing (100), the battery assembly comprising at least one battery module (200); A fixing frame assembly (300), the fixing frame assembly (300) comprising a first fixing base (310), a second fixing base (320) and a fixing plate (330), the first fixing base (310) and the second fixing base (320) being respectively arranged at two ends of the battery assembly and flush with the bottom of the battery assembly, the fixing plates (330) being arranged at both ends of the battery module (200), the battery module (200) being fixedly connected to the fixing plates (330) at both ends, and the fixing plates (330) being fixed to the first fixing base (310) or the second fixing base (320); A fixing seat (340) is provided on the fixing plate (330), a first connecting piece (400) is fixed on the fixing seat (340), and the input interface (110) and the output interface (120) are electrically connected to the battery assembly via each of the first connecting pieces (400).

2. The golf cart power supply according to claim 1, wherein: A BMS fixing frame (500) is provided on the first fixing base (310), the BMS fixing frame (500) is fixed on the first fixing base (310), a BMS board (510) is fixed on the BMS fixing frame (500), and the BMS board (510) is electrically connected to the battery assembly.

3. The golf cart power supply according to claim 2, wherein: The battery module (200) comprises a plurality of square battery cells (210), the connection terminals of the plurality of square battery cells (210) are upward and connected in series, and a first protective plate (220) is provided between the two ends of the battery module (200) and the square battery cells (210).

4. The golf cart power supply according to claim 3, wherein: A second protective plate (230) is provided at the bottom of the battery module (200), a third protective plate (240) is provided at the top of the battery module (200), through holes are provided on the third protective plate (240) corresponding to the connection terminals of the square battery cells (210), and the third protective plate (240) is in contact with the square battery cells (210).

5. The golf cart power supply according to claim 4, characterized in that: A protective frame (260) is further provided on the top of the battery module (200). The protective frame (260) is arranged along the length direction of the battery module (200). The protective frame (260) is U-shaped. Both sides of the U-shaped opening of the protective frame (260) are fixed to the battery module (200). A gap is provided between the protective frame (260) and the connection terminal of the square battery cell (210).

6. The golf cart power supply according to claim 1, wherein: A fixing groove (350) is provided at the bottom of the first fixing base (310) and / or the second fixing base (320), and a limiting column (130) is provided on the battery housing (100) corresponding to the fixing groove (350), and the limiting column (130) is snapped into the fixing groove (350).

7. The golf cart power supply according to claim 4, characterized in that: The top of the fixing plate (330) is provided with a bayonet (331), and the bottom of the fixing seat (340) is provided with a clamping block (341) corresponding to the bayonet (331), and the clamping block (341) is clamped and fixed to the bayonet (331).

8. The golf cart power supply according to claim 7, wherein: The battery assembly comprises two battery modules (200), the two battery modules (200) are arranged in parallel, the two battery modules (200) are connected via a second connecting piece (600), and the second connecting piece (600) is fixedly connected to the fixing plate (330) via the fixing seat (340).

9. The golf cart power supply according to claim 4, wherein: At least one semiconductor refrigeration plate is embedded in the second protective plate (230), the semiconductor refrigeration plate is electrically connected to the BMS plate (510), the cold end of the semiconductor refrigeration plate is thermally connected to the second protective plate (230), a heat sink is provided on the hot end of the semiconductor refrigeration plate, and the semiconductor refrigeration plate and the heat sink are connected via a heat-conducting material.

10. The golf cart power supply according to claim 1, wherein: A cavity filled with a heat-conducting fluid is provided inside the battery housing (100), the battery module (200) is immersed or partially immersed in the heat-conducting fluid, the heat-conducting fluid is thermally connected to the battery housing (100), and the heat-conducting fluid is mineral oil or synthetic oil.

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