Heat dissipation type electric power-assisted bicycle battery box

Abstract

The invention relates to a heat dissipation type electric power-assisted bicycle battery box in the field of battery boxes, which comprises a bicycle frame, a mounting groove is formed in the bicycle frame, a battery module is clamped in the mounting groove, the battery module comprises a battery box, a protective cover is clamped at an opening of the battery box, and a mounting groove is formed in the top end of the battery box. Heat dissipation fin plates are fixedly connected to the mounting grooves, a plurality of uniformly distributed batteries are mounted in the battery box, and wiring sockets matched with the distributed batteries are mounted in the battery box; an electric telescopic rod is installed on the butt joint seat, the power output end of the electric telescopic rod is connected with the butt joint plug in a clamped mode, the distributed battery comprises a box body, and one end of the box body is movably connected with a power connection plug matched with the wiring socket, so that real-time monitoring and quick response to the battery temperature through a partition structure are achieved; and the battery module can be pushed out of the frame as required and is in direct contact with the external environment for efficient heat dissipation.

Description

Technical Field

[0001] The invention relates to an electric-assisted bicycle battery box, in particular to a heat-dissipating electric-assisted bicycle battery box applied in the field of battery boxes. Background Art

[0002] Existing battery boxes for electric bicycles are usually designed as compact and durable units that can accommodate lithium-ion battery packs and provide necessary connections and protection functions. Battery boxes are generally installed on the frame of the bicycle, such as under the rear seat or inside the frame tube to maintain the balance and aesthetics of the vehicle. They are usually waterproof and dustproof to ensure that the battery can operate safely in all weather conditions.

[0003] Existing battery boxes have some defects in heat dissipation. Since the battery generates heat when working, if the heat dissipation design is insufficient, the increase in battery temperature may lead to performance degradation and even cause safety issues such as overheating and battery damage. Secondly, the vent design of some battery boxes is not sufficient, or the air flow cannot be effectively used to dissipate heat in a compact installation space. In addition, the material and structure of the battery box may not be conducive to the rapid conduction and dissipation of heat, especially in long-term riding or high-temperature environments.

[0004] The specification of Chinese invention patent CN108520987B discloses a temperature-adjustable electric vehicle battery assembly, including a battery box and a box cover. An electrical connector is provided on the side of the battery box, a heat sink is provided on the bottom plate of the battery box, a heat conduction plate is provided on the upper side of the heat sink, the heat conduction plate is fixedly connected to the inner wall of the battery box on all sides, a plurality of vertical heat conduction partitions are provided on the upper side of the heat conduction plate, and vertical heat conduction channels are provided in the heat conduction partitions. A distributed storage battery is provided in each battery mounting cavity. In cold winter, the space in the battery box is heated by the hot end of the semiconductor refrigeration sheet, thereby maintaining a suitable working temperature of the distributed storage battery, thereby improving the endurance.

[0005] The specification of Chinese invention patent CN105826498B discloses a heat dissipation type battery box structure, including a battery box body and a cover body. A plurality of heat conducting tubes I and II are arranged on the outside of the battery box body. The inner end of each heat conducting tube I extends into the battery box body from the bottom of the battery box body and fits with the front inner wall of the battery box body, the outer end of each heat conducting tube I fits with the rear outer wall of the battery box body, and the inner end of each heat conducting tube II extends into the battery box body from the bottom of the battery box body and fits with the rear inner wall of the battery box body. The invention has high strength and good heat dissipation performance, and effectively improves the performance and service life of lithium batteries.

[0006] The battery box of the electric assisted bicycle in the prior art has the problem of insufficient heat dissipation. The battery box in the prior art has defects in heat dissipation. The heat generated by the battery during operation cannot be effectively dissipated, which may cause battery performance degradation and even cause safety problems such as overheating and battery damage. In addition, air flow cannot be effectively used to dissipate heat in the compact installation space. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is the problem of insufficient heat dissipation in the battery box of the electric assisted bicycle in the prior art. The battery box in the prior art has defects in heat dissipation. The heat generated by the battery during operation cannot be effectively dissipated, which may lead to a decline in battery performance and even cause safety problems such as overheating and battery damage. In addition, air flow cannot be effectively utilized to dissipate heat in the compact installation space.

[0008] In order to solve the above problems, the present invention provides a heat dissipation type electric assisted bicycle battery box, comprising a bicycle frame, a mounting groove is provided on the bicycle frame, a battery module is clamped in the mounting groove, the battery module comprises a battery box, a protective cover is clamped at the opening of the battery box, a mounting groove is provided on the top of the battery box, a heat dissipation fin plate is fixedly connected to the mounting groove, a plurality of evenly distributed distributed batteries are installed in the battery box, and a wiring socket matching the distributed batteries is installed in the battery box; an electric telescopic rod is installed on the docking seat, and the power output end of the electric telescopic rod is clamped with the docking plug;

[0009] The distributed battery includes a box body, one end of which is movably connected to a power plug matching the wiring socket, a plurality of evenly distributed battery cells are installed in the box body, and the plurality of battery cells are all connected to the power plug; docking plugs are installed at both ends of the battery box, and a docking seat is connected in the installation groove through an elastic wire;

[0010] A partition structure is connected between two adjacent distributed batteries, and the partition structure includes a partition plate fixedly connected to the protective cover, a storage cavity is opened in the partition plate, a piston rod is plugged into the storage cavity, and a pressure plate matching the power plug is fixedly connected to the piston rod;

[0011] The bicycle frame is provided with heat dissipation slots on both sides of the battery module, and a heat dissipation fan is installed in the middle of the heat dissipation slots.

[0012] In the above-mentioned heat dissipation type electric assisted bicycle battery box, rapid heat dissipation and battery management of the battery module are achieved.

[0013] As a further improvement of the present application, a plurality of evenly distributed heat dissipation fins are fixedly connected to both ends of the heat dissipation groove, and through holes matching the heat dissipation fins are opened on the bicycle frame.

[0014] As a further improvement of the present application, extension plates are fixedly connected to both ends of the battery box, the docking plug is fixedly connected at the connection between the extension plate and the battery box, and a receiving groove matching the extension plate is provided at the opening of the mounting groove.

[0015] As another improvement of the present application, a pair of positioning holes are provided on the extension plate, and a positioning bolt is connected between the positioning hole and the mounting slot. The positioning bolt includes a threaded connector threadedly connected to the positioning hole, and a positioning rod is inserted into one end of the threaded connector located in the mounting slot. A positioning groove is provided at the top of the positioning rod, and a movable pin is slidably connected in the positioning groove. A slot matching the positioning rod is provided on the mounting slot, and a locking slot matching the movable pin is provided in the slot; an electromagnet matching the positioning rod is fixedly connected to the side end of the battery box.

[0016] As another improvement of the present application, an auxiliary cooling pipe covering the heat dissipation fin plate is passed through the bicycle frame, and a circulating liquid pump matching the guide pipe is installed on the bicycle frame.

[0017] As another improvement of the present application, an auxiliary heat dissipation system is also included, the auxiliary heat dissipation system includes a single chip microcomputer, and the single chip microcomputer is connected to a data processing module, a detection module, a control module and a data storage module;

[0018] The detection module is used to monitor the temperature of the battery module and the distributed battery in real time. A temperature sensor matching the detection module is provided in the battery module. When the detected temperature exceeds a preset threshold, the detection module sends a signal to the data processing module;

[0019] A data processing module is used to collect and process temperature data from the detection module, analyze the thermal state of the battery module, and transmit the processed information to the control module;

[0020] A control module, used to receive and execute instructions from the data processing module, and control the electric telescopic rod, the cooling fan and the circulating liquid pump to perform preset actions according to the instructions;

[0021] The data storage module is used to record the temperature change history data of the battery module.

[0022] As another improved supplement of the present application, the control module is provided with an internal heat dissipation mode and an external heat dissipation mode; in the internal heat dissipation mode, a pair of heat dissipation fans are controlled to perform air cooling and heat dissipation on both sides of the battery module, and at the same time, the circulating liquid pump is controlled to operate so that the coolant circulates in the auxiliary cooling pipe, so that the distributed battery can dissipate heat through the heat dissipation fin plate and the coolant flowing in the auxiliary cooling pipe;

[0023] In the external heat dissipation mode, the battery module is pushed out of the frame by controlling the electric telescopic rod, so that the battery module is in direct contact with the external airflow. At the same time, the blades of a pair of cooling fans are controlled to rotate in the same direction so that airflow flows over the battery module, realizing heat exchange between the battery module and the airflow in all directions.

[0024] As another improvement of the present application, a plurality of distributed batteries are arranged into two groups, the capacities of the two groups of distributed batteries are equal, and the distributed batteries located at both ends of the battery box are grouped together.

[0025] In summary, the partition structure can realize real-time monitoring and rapid response to the battery temperature. Once an abnormal increase in battery temperature is detected, the system will immediately perform a physical power-off to effectively prevent safety accidents that may be caused by battery overheating and ensure the safety of the rider. In addition, the battery module can be quickly pushed out of the frame when needed and directly contact the external environment to achieve efficient heat dissipation. At the same time, the coordinated work of the cooling fan and the cooling fins further enhances the heat dissipation performance of the battery module, jointly ensuring that the battery module maintains a good heat dissipation effect under normal working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional diagram of a bicycle battery box according to the first embodiment of the present application;

[0027] Figure 2 This is an exploded view of a bicycle battery box according to the first embodiment of the present application;

[0028] Figure 3 This is a side sectional view of a bicycle battery box according to the first embodiment of the present application;

[0029] Figure 4 for Figure 3 The structural diagram at A in the middle;

[0030] Figure 5 A cross-sectional view of a bicycle battery box at a positioning bolt according to the first embodiment of the present application;

[0031] Figure 6 This is a partial cross-sectional view of the positioning bolt of the first embodiment of the present application;

[0032] Figure 7 This is a partial cross-sectional view of the partition structure of the first embodiment of the present application;

[0033] Figure 8 A cross-sectional view of the heat dissipation fins in the external heat dissipation mode of the first and second embodiments of the present application;

[0034] Fig. 9 This is a block diagram of the auxiliary heat dissipation system of the second embodiment of the present application.

[0035] Description of the numbers in the figure:

[0036] 1. Bicycle frame; 2. Battery module; 3. Distributed battery; 4. Partition structure; 5. Cooling fan; 6. Electric telescopic rod; 7. Positioning bolt; 21. Battery box; 22. Protective cover; 23. Cooling fin plate; 24. Wiring socket; 25. Docking plug; 31. Box body; 32. Battery unit; 33. Power plug; 41. Partition plate; 42. Piston rod; 43. Pressure plate; 211. Extension plate; 71. Threaded connector; 72. Positioning rod; 73. Movable latch. DETAILED DESCRIPTION

[0037] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0038] The first implementation method:

[0039] Figure 1 - Figure 8 Shown is a heat dissipation type battery box for an electric power-assisted bicycle, comprising a bicycle frame 1, a mounting groove is provided on the bicycle frame 1, a battery module 2 is clamped in the mounting groove, the battery module 2 comprises a battery box 21, a protective cover 22 is clamped at the opening of the battery box 21, a mounting groove is provided at the top of the battery box 21, a heat dissipation fin plate 23 is fixedly connected to the mounting groove, a plurality of evenly distributed distributed batteries 3 are installed in the battery box 21, and a wiring socket 24 matching the distributed batteries 3 is installed in the battery box 21;

[0040] The distributed battery 3 includes a box body 31, one end of which is movably connected to a power plug 33 matching the wiring socket 24, and a plurality of evenly distributed battery cells 32 are installed in the box body 31, and the plurality of battery cells 32 are all connected to the power plug 33; docking plugs 25 are installed at both ends of the battery box 21, and a docking seat is connected in the installation groove through an elastic wire;

[0041] A partition structure 4 is connected between two adjacent distributed batteries 3. The partition structure 4 includes a partition plate 41 fixedly connected to the protective cover 22, and the partition plate 41 is attached to one distributed battery 3. A storage cavity is provided in the partition plate 41, and the storage cavity is filled with thermal expansion liquid. A piston rod 42 is plugged into the storage cavity, and a pressure plate 43 matching the power plug 33 is fixedly connected to the piston rod 42.

[0042] The partition structure 4 monitors the temperature of the distributed battery 3. When the temperature is too high, the thermal expansion fluid expands and pushes the piston rod 42 to move, causing the pressure plate 43 to press the power plug 33, thereby separating the power plug 33 from the wiring socket 24. The partition structure 4 disconnects the wiring socket 24 when the battery is overheated, thereby physically disconnecting the distributed battery 3 and preventing overheating.

[0043] The bicycle frame 1 is provided with a guide hole covering the wiring socket 24, and the bicycle frame 1 is provided with a heat dissipation groove located on both sides of the battery module 2. A heat dissipation fan 5 is installed in the middle of the heat dissipation groove, and multiple evenly distributed heat dissipation fins are fixedly connected to both ends of the heat dissipation groove. The bicycle frame 1 is provided with a through hole matching the heat dissipation fins.

[0044] An electric telescopic rod 6 is installed on the docking seat, and the power output end of the electric telescopic rod 6 is clamped with the docking plug 25. When the electric telescopic rod 6 is working, the battery module 2 is pushed out of the bicycle frame 1 by a set distance, so that a part of the battery module 2 is exposed, so that the battery module 2 is directly heat-exchanged with the external airflow for heat dissipation; when the battery temperature is too high, the electric telescopic rod 6 pushes the battery module 2 out of the frame, so that the battery module 2 is directly in contact with the external airflow, thereby improving the heat dissipation efficiency; in the initial state, the telescopic end of the electric telescopic rod 6 is self-locking, and the battery module 2 is limited in the installation groove by the locked electric telescopic rod 6;

[0045] Both ends of the battery box 21 are fixedly connected with extension plates 211 , and the docking plug 25 is fixedly connected at the connection between the extension plate 211 and the battery box 21 . An accommodating groove matching the extension plate 211 is provided at the opening of the mounting groove.

[0046] A pair of positioning holes are provided on the extension plate 211, and a positioning bolt 7 is connected between the positioning holes and the mounting groove. The positioning bolt 7 includes a threaded connector 71 threadedly connected to the positioning hole, and a positioning rod 72 is inserted into one end of the threaded connector 71 located in the mounting groove. A damping slide groove matching the positioning rod 72 is provided on the threaded connector 71, and a positioning groove is provided at the top of the positioning rod 72. A movable latch 73 is slidably connected in the positioning groove, and a permanent magnet is arranged in the movable latch 73. A slot matching the positioning rod 72 is provided on the mounting groove, and a locking slot matching the movable latch 73 is provided in the slot; an electromagnet matching the positioning rod 72 is fixedly connected to the side end of the battery box 21. When the electromagnet is working, the electromagnet repels the permanent magnet, so that the movable latch 73 is separated from the locking groove and received in the positioning rod 72, and the positioning bolt 7 is detachable at this time;

[0047] When installing the positioning bolt 7, after the movable bolt 73 is fully inserted into the slot, the electromagnet works to attract the permanent magnet, so that the movable bolt 73 is inserted into the locking slot, and then the threaded connector 71 is rotated to be threadedly connected with the positioning hole, and the installation of the positioning bolt 7 is completed at this time; the positioning bolt 7 is used to limit the battery module 2 to prevent the battery module 2 from completely falling off the bicycle frame 1 when the electric telescopic rod 6 is accidentally separated;

[0048] This solution can achieve that when the battery is in normal use, the battery is located in 1, and when the distributed battery 3 is working, the temperature of the distributed battery 3 is monitored by the partition structure 4. When the temperature of the distributed battery 3 is higher than the maximum set value, the partition structure 4 can quickly press the wiring socket 24 to cut off the power of the distributed battery 3;

[0049] When the battery temperature is higher than the set value, the battery power consumption is stopped first, and then the battery module 2 can be driven outward through the action of the electric telescopic rod 6, so that the battery module 2 is directly exposed to the external environment and directly exchanges heat with the external airflow. At the same time, the cooling fan 5 works to synchronize the airflow heat exchange with the wiring socket 24 on the top, thereby realizing rapid cooling of the battery module 2.

[0050] This solution realizes real-time monitoring and rapid response to the battery temperature through the partition structure 4. Once an abnormal increase in the battery temperature is detected, the system will immediately perform a physical power-off to effectively prevent safety accidents that may be caused by battery overheating and ensure the safety of the rider. In addition, the battery module 2 is quickly pushed out of the frame when needed and directly contacts the external environment to achieve efficient heat dissipation. At the same time, the coordinated work of the cooling fan 5 and the cooling fin plate 23 further enhances the heat dissipation performance of the battery module 2, and jointly ensures that the battery module 2 maintains a good heat dissipation effect under normal working conditions. In addition, this solution is highly integrated, occupies a small installation space, and has a high utilization rate of the installation space on the electric assisted bicycle.

[0051] Second implementation method:

[0052] Figure 8-Figure 9 As shown, it also includes an auxiliary heat dissipation system, which includes a single-chip microcomputer, and the single-chip microcomputer is connected to a data processing module, a detection module, a control module and a data storage module;

[0053] The auxiliary heat dissipation system is responsible for monitoring the temperature of the battery module 2, controlling the heat dissipation mechanism, and storing and processing relevant data to ensure that the battery module 2 operates within a safe temperature range.

[0054] A technician in this field installs a single-chip microcomputer, the core component of the auxiliary heat dissipation system, on a suitable position of the bicycle frame, and a data processing module, a detection module, a control module and a data storage module are connected to the single-chip microcomputer.

[0055] The detection module is used to monitor the temperature of the battery module 2 and the distributed battery 3 in real time. A temperature sensor matching the detection module is provided in the battery module 2. When the detected temperature exceeds a preset threshold, the detection module sends a signal to the data processing module;

[0056] A data processing module, used to collect and process temperature data from the detection module, analyze the thermal state of the battery module 2, and transmit the processed information to the control module;

[0057] The control module is used to receive and execute the instructions of the data processing module, and control the electric telescopic rod 6, the cooling fan 5 and the circulating liquid pump to perform preset actions according to the instructions. The control module is provided with an internal cooling mode and an external cooling mode. In the internal cooling mode, the two sides of the battery module 2 are cooled by air by controlling a pair of cooling fans 5, and the circulating liquid pump is controlled to work so that the cooling liquid circulates in the auxiliary cooling pipe, so that the distributed battery 3 exchanges heat with the cooling liquid flowing in the auxiliary cooling pipe through the cooling fin plate 23 to dissipate heat;

[0058] In the external heat dissipation mode, the battery module 2 is pushed out of the frame by controlling the electric telescopic rod 6, so that the battery module 2 is in direct contact with the external airflow, and at the same time, the blades of a pair of heat dissipation fans 5 are controlled to rotate in the same direction, so that airflow flows on the upper side of the battery module 2, so that the battery module 2 can exchange heat with the airflow in all directions, thereby improving the heat dissipation efficiency;

[0059] When the battery temperature rises, the control module will drive the electric telescopic rod 6 to push the battery module 2 out of the frame to increase the heat dissipation area, and start the heat dissipation fan 5 to enhance air circulation.

[0060] The data storage module is used to record the temperature change history data of the battery module to facilitate long-term analysis of battery performance and the efficiency of the cooling system, as well as to provide a reference for future system optimization.

[0061] The heat dissipation fins 23 are used to increase the heat dissipation area. In the internal heat dissipation mode, the heat dissipation fins 23 exchange heat with the auxiliary cooling tube. In the external heat dissipation mode, the heat dissipation fins 23 exchange heat with the airflow introduced by the heat dissipation fan 5, and the heat dissipation fan 5 accelerates the heat dissipation of the heat dissipation fins 23 and the battery module 2 through forced convection.

[0062] The heat dissipation type electric power-assisted bicycle battery box of this solution can effectively regulate the battery temperature, ensure the performance and safety of the battery, and extend the service life of the battery.

[0063] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A heat dissipation type electric assisted bicycle battery box, comprising a bicycle frame (1), wherein the bicycle frame (1) is provided with a mounting groove, wherein a battery module (2) is clamped in the mounting groove, and wherein: The battery module (2) comprises a battery box (21), a protective cover (22) is clamped at the opening of the battery box (21), a mounting groove is provided at the top of the battery box (21), a heat dissipation fin plate (23) is fixedly connected to the mounting groove, a plurality of evenly distributed distributed batteries (3) are installed in the battery box (21), and a wiring socket (24) matching the distributed batteries (3) is installed in the battery box (21); The distributed battery (3) comprises a box body (31), one end of the box body (31) is movably connected to a power plug (33) matching the wiring socket (24), a plurality of evenly distributed battery cells (32) are installed in the box body (31), and the plurality of battery cells (32) are all connected to the power plug (33); docking plugs (25) are installed at both ends of the battery box (21), and a docking seat is connected in the installation groove via an elastic wire; an electric telescopic rod (6) is installed on the docking seat, and the power output end of the electric telescopic rod (6) is snap-connected to the docking plug (25); A partition structure (4) is connected between two adjacent distributed batteries (3), the partition structure (4) comprising a partition plate (41) fixedly connected to the protective cover (22), a storage cavity is provided in the partition plate (41), a piston rod (42) is plugged into the storage cavity, and a pressure plate (43) matching the power plug (33) is fixedly connected to the piston rod (42); The bicycle frame (1) is provided with heat dissipation grooves located on both sides of the battery module (2), and a heat dissipation fan (5) is installed in the middle of the heat dissipation grooves.

2. A heat dissipation type electric-assisted bicycle battery box according to claim 1, characterized in that: Both ends of the heat dissipation groove are fixedly connected with a plurality of evenly distributed heat dissipation fins, and the bicycle frame (1) is provided with through holes matching the heat dissipation fins.

3. A heat dissipation type electric-assisted bicycle battery box according to claim 2, characterized in that: Both ends of the battery box (21) are fixedly connected to extension plates (211), the docking plug (25) is fixedly connected to the connection between the extension plate (211) and the battery box (21), and a receiving groove matching the extension plate (211) is provided at the opening of the installation groove.

4. A heat dissipation type electric-assisted bicycle battery box according to claim 3, characterized in that: The extension plate (211) is provided with a pair of positioning holes, a positioning bolt (7) is connected between the positioning hole and the mounting slot, the positioning bolt (7) comprises a threaded connector (71) threadedly connected to the positioning hole, one end of the threaded connector (71) located in the mounting slot is plugged with a positioning rod (72), a positioning groove is provided at the top end of the positioning rod (72), a movable latch (73) is slidably connected in the positioning groove, a slot matching the positioning rod (72) is provided on the mounting slot, and a locking slot matching the movable latch (73) is provided in the slot; an electromagnet matching the positioning rod (72) is fixedly connected to the side end of the battery box (21).

5. The heat dissipation type electric-assisted bicycle battery box according to claim 4, characterized in that: An auxiliary cooling pipe covering the heat dissipation fin plate (23) is inserted into the bicycle frame (1), and a circulating liquid pump matching the guide pipe is installed on the bicycle frame (1).

6. A heat dissipation type electric-assisted bicycle battery box according to claim 5, characterized in that: It also includes an auxiliary heat dissipation system, which includes a single-chip microcomputer, and the single-chip microcomputer is connected to a data processing module, a detection module, a control module and a data storage module; A detection module, used for real-time monitoring of the temperature of the battery module (2) and the distributed battery (3); a temperature sensor matching the detection module is provided in the battery module (2); when the detected temperature exceeds a preset threshold, the detection module sends a signal to the data processing module; A data processing module, used to collect and process temperature data from the detection module, analyze the thermal state of the battery module (2), and transmit the processed information to the control module; A control module, used for receiving and executing instructions from the data processing module, and controlling the electric telescopic rod (6), the cooling fan (5) and the circulating liquid pump to perform preset actions according to the instructions; The data storage module is used to record the temperature change history data of the battery module (2).

7. A heat dissipation type electric-assisted bicycle battery box according to claim 6, characterized in that: The control module is provided with an internal heat dissipation mode and an external heat dissipation mode; in the internal heat dissipation mode, a pair of heat dissipation fans (5) are controlled to perform air cooling and heat dissipation on both sides of the battery module (2), and a circulating liquid pump is controlled to operate so that coolant circulates in the auxiliary cooling pipe, thereby achieving heat dissipation through heat exchange between the distributed battery and the coolant flowing in the auxiliary cooling pipe through the heat dissipation fin plate (23); In the external heat dissipation mode, the battery module (2) is pushed out of the frame by controlling the electric telescopic rod (6), so that the battery module (2) is in direct contact with the external airflow, and at the same time, the blades of a pair of heat dissipation fans (5) are controlled to rotate in the same direction, so that airflow flows on the upper side of the battery module (2), thereby achieving heat exchange between the battery module (2) and the airflow in all directions.

8. The heat dissipation type electric-assisted bicycle battery box according to claim 1, characterized in that: The plurality of distributed batteries (3) are arranged into two groups, the two groups of distributed batteries have equal capacities, and the distributed batteries (3) located at both ends of the battery box (21) are grouped together.

Images