A down tube battery system for electric vehicle

Abstract

The present invention discloses a downtube battery system for an electric vehicle, including a battery shell and a frame, wherein the outer surface of the battery shell is provided with outer ring grooves near both ends, the inner surface of the ring groove is bonded with a No. 1 airbag near the outer surface of the battery shell, and the inner surface of the ring groove is bonded with a No. 2 airbag near the inner surface of the battery shell. The downtube battery system for an electric vehicle described in the present invention integrates a controller with a battery, and places the output line of the power supply, the power plug line and the meter plug line in the gaps on both sides of the controller and the controller fixing box, respectively, so that the battery system structure is more compact and the occupied space and volume are reduced. The downtube is installed between the head tube and the frame, and a pick-up and placement groove is provided inside the head tube, so that the difficulty of disassembling and installing the battery system is reduced. Secondly, the components inside the battery system can also be replaced and repaired.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a downtube battery system for an electric vehicle. Background Art

[0002] The electric vehicle battery system is a device used to power the electrical equipment on the electric vehicle. However, with the development of technology, people's requirements for electric vehicle battery systems are getting higher and higher, resulting in the traditional electric vehicle battery system can no longer meet people's needs;

[0003] The existing electric vehicle battery system has certain disadvantages when in use. Since the electrical equipment on the electric vehicle is widely distributed, when installing the battery, it is necessary to arrange and install multiple lines for power supply. Therefore, it takes a lot of time to lay the lines during installation. Secondly, when a part is damaged and needs to be repaired, it is necessary to remove all the lines before replacing or repairing the battery system. For this reason, we propose an electric vehicle downtube battery system. Summary of the invention

[0004] The main purpose of the present invention is to provide an electric vehicle downtube battery system, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An electric vehicle downtube battery system comprises a battery housing and a vehicle frame, wherein the outer surface of the battery housing 1 is provided with outer ring grooves near both ends, and a No. 1 airbag 3 is bonded to the inner surface of the outer ring groove near the outer surface of the battery housing 1, and the inner surface of the battery housing 1 is provided with inner ring grooves near both ends, and a No. 2 airbag 12 is bonded to the inner surface of the inner ring groove near the inner surface of the battery housing 1, and a vent pipe is connected between the No. 1 airbag and the No. 2 airbag inside the battery housing, a fixing box is fixedly installed at one end of the battery housing by bolts, and a sensor plug line and a motor plug line are connected to the end of the fixing box away from the battery housing, The motor plug wire is located below the sensor plug wire, a self-locking motor is fixedly installed inside the fixing box by bolts, and an output shaft is movably installed at the center of the front end outer surface of the self-locking motor, and two traction ropes are wrapped around the outer surface of the output shaft, guide grooves are provided on both side inner walls of the battery shell, and pulleys are provided on both side inner walls of the battery shell near the top end of the guide grooves, a connecting plate is movably installed inside the battery shell, and the ends of the two traction ropes away from the self-locking motor respectively pass through the guide grooves and are connected to the top end outer surface of the connecting plate, a head pipe is welded to the front end outer surface of the frame, and a down tube is welded between the bottom end of the frame and the outer surface of the head pipe.

[0007] Preferably, a receiving and releasing groove is formed through the inner center of the lower tube, the battery housing is movably mounted on the inner surface of the receiving and releasing groove, a taking and releasing groove is formed through the head tube near the receiving and releasing groove, and a head plate is fixedly mounted on the front end outer surface of the head tube near the taking and releasing groove by bolts.

[0008] Preferably, the end of the battery housing away from the fixing box is connected to a switch plug wire, a charging plug wire and a stopwatch plug wire, and the switch plug wire is located at the front end of the charging plug wire, and the stopwatch plug wire is located between the switch plug wire and the charging plug wire, the top end of the switch plug wire is connected to a switch seat, and the front end of the charging plug wire is connected to the charging seat, and the switch seat and the charging seat are respectively mounted on the outer surfaces of both sides of the lower tube by bolts.

[0009] Preferably, five battery packs are mounted on the top outer surface of the connecting plate, and a top cover is welded to the top outer surface of the battery pack.

[0010] Preferably, six 18650 battery cells are arranged inside the battery pack, and the shape of the 18650 battery cells is cylindrical.

[0011] Preferably, a waterproof rubber pad is bonded to the inside of the battery shell near the battery pack, and a waterproof film is bonded to the outer surface of the battery shell, and a plurality of switch buttons are provided on the front outer surface of the fixing box.

[0012] Preferably, one end of the ventilation pipe away from the No. 1 airbag is connected to a valve core, and the valve core is mounted on the outer surface of the bottom end of the fixing box.

[0013] Preferably, the end of the motor plug wire away from the fixing box is connected to the motor, the end of the sensor plug wire away from the fixing box is connected to the sensor, the sensor includes a torque sensor and a speed sensor, and the end of the meter plug wire away from the battery housing is connected to the meter.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention connects the controller and the battery as one, and places the output line of the power supply, the power plug line and the meter plug line in the gaps on both sides of the controller and the controller fixing box, respectively, so that the battery system structure is more compact and the occupied space and volume are reduced;

[0016] 2. By installing the down tube between the head tube and the frame and opening a take-and-place slot inside the head tube, the difficulty of disassembling and installing the battery system is reduced. Secondly, the parts inside the battery system can also be replaced and repaired;

[0017] 3. Install a self-locking motor inside the fixed box, and wind a traction rope around the outer surface of the self-locking motor. When the self-locking motor rotates, the traction rope is rolled up, and the battery pack is driven to move outward through the traction rope and removed from the battery housing, so as to facilitate the repair and replacement of the battery and the components installed in the battery housing;

[0018] 4. By arranging a No. 1 airbag on the outer surface of the battery shell, when the No. 1 airbag is inflated, it squeezes the inner wall of the lower tube, which can not only fix the battery shell and the lower tube, but also fill the gap between the lower tube and the battery shell to prevent dust or water from entering the lower tube;

[0019] 5. By arranging a No. 2 airbag on the inner wall of the battery casing, the No. 2 airbag expands when inflated, squeezing the space inside the battery casing, which can not only fix the battery, but also seal the inner wall of the battery casing to prevent dust or water from entering the battery casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a downtube battery system for an electric vehicle according to the present invention;

[0021] Figure 2 This is a front view of the entire downtube battery system of an electric vehicle according to the present invention;

[0022] Figure 3 A partial cross-sectional view of the entire downtube battery system of an electric vehicle according to the present invention;

[0023] Figure 4 A cross-sectional view of a battery housing in a downtube battery system of an electric vehicle according to the present invention;

[0024] Figure 5 A connection diagram of a traction mechanism in a downtube battery system of an electric vehicle according to the present invention;

[0025] Figure 6 This is a structural diagram of a rear frame after the battery system is installed in a downtube battery system of an electric vehicle of the present invention;

[0026] Figure 7 It is a sectional view of a vehicle frame when installing and disassembling a battery system in a downtube battery system of an electric vehicle according to the present invention;

[0027] Figure 8 This is a connection diagram of a battery system in a downtube battery system of an electric vehicle according to the present invention.

[0028] In the figure: 1. Battery casing; 2. Frame; 3. Airbag No. 1; 4. Fixing box; 5. Sensor plug wire; 6. Motor plug wire; 7. Switch plug wire; 8. Charging plug wire; 9. Self-locking motor; 10. Towing rope; 11. Connecting plate; 12. Airbag No. 2; 13. Ventilation pipe; 14. Head pipe; 15. Top plate; 16. Down tube; 17. Battery pack; 18. Top cover. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] Reference Figure 1-7 As shown, an electric vehicle downtube battery system, the outer surface of the battery shell 1 is provided with outer ring grooves near both ends, the inner surface of the outer ring groove is bonded with a No. 1 airbag 3 near the outer surface of the battery shell 1, the inner surface of the battery shell 1 is provided with inner ring grooves near both ends, the inner surface of the inner ring groove is bonded with a No. 2 airbag 12 near the inner surface of the battery shell 1, a vent pipe 13 is connected between the No. 1 airbag 3 and the No. 2 airbag 12 inside the battery shell 1, a fixing box 4 is fixedly installed at one end of the battery shell 1 by bolts, and a sensor plug line 5 and a motor plug line 6 are connected to the end of the fixing box 4 away from the battery shell 1, and the motor plug line 6 is located at Below the sensor plug line 5, a self-locking motor 9 is fixedly installed inside the fixed box 4 by bolts, and an output shaft is movably installed at the center of the front end outer surface of the self-locking motor 9, and two traction ropes 10 are wound around the outer surface of the output shaft. Guide grooves are provided on the inner walls on both sides of the battery casing 1, and pulleys are provided on the inner walls on both sides of the battery casing 1 near the top end of the guide grooves. A connecting plate 11 is movably installed inside the battery casing 1, and one end of the two traction ropes 10 away from the self-locking motor 9 passes through the guide grooves and is connected to the top outer surface of the connecting plate 11. A head pipe 14 is welded to the front end outer surface of the frame 2, and a down tube 16 is welded between the bottom end of the frame 2 and the outer surface of the head pipe 14.

[0031] Reference Figure 6-7 As shown, a receiving groove is opened through the inner center of the lower tube 16, the battery housing 1 is movably mounted on the inner surface of the receiving groove, a taking-in groove is opened through the head tube 14 near the receiving groove, and a head plate 15 is fixedly mounted on the front end outer surface of the head tube 14 near the taking-in groove by bolts.

[0032] Reference Figure 1As shown, the end of the battery housing 1 away from the fixing box 4 is connected to the switch plug wire 7, the charging plug wire 8 and the meter plug wire, and the switch plug wire 7 is located at the front end of the charging plug wire 8, the meter plug wire is located between the switch plug wire 7 and the charging plug wire 8, the top of the switch plug wire 7 is connected to the switch seat, the front end of the charging plug wire 8 is connected to the charging seat, and the switch seat and the charging seat are respectively mounted on the outer surfaces of both sides of the lower tube 16 by bolts.

[0033] Reference Figure 6 As shown, five battery packs 17 are mounted on the top outer surface of the connecting plate 11 , and a top cover 18 is welded to the top outer surface of the battery pack 17 .

[0034] Reference Figure 3 The battery pack 17 is internally provided with six 18650 battery cells, and the shape of the 18650 battery cells is cylindrical.

[0035] Reference Figure 1 A waterproof rubber pad is bonded to the inside of the battery shell 1 near the battery pack 17, and a waterproof film is bonded to the outer surface of the battery shell 1. A plurality of switch buttons are provided on the outer surface of the front end of the fixing box 4.

[0036] Reference Figure 4 One end of the vent pipe 13 away from the first airbag 3 is connected to a valve core, and the valve core is installed on the outer surface of the bottom end of the fixing box 4.

[0037] Reference Figure 8 The end of the motor plug line 6 away from the fixing box 4 is connected to the motor, the end of the sensor plug line 5 away from the fixing box 4 is connected to the sensor, the sensor includes a torque sensor and a speed sensor, and the end of the meter plug line away from the battery housing 1 is connected to the meter.

[0038] The battery system is composed of three parts: battery, controller and connecting wire.

[0039] (1) Battery part: Figure 3 As shown, five battery packs 17 are installed inside the battery casing 1, each battery pack 17 consists of six 18650 battery cells, and every two battery packs 17 are connected by a battery cell skeleton, and each battery pack 17 is fixedly arranged and assembled inside the battery casing 1; the front end of the battery has an output end, which can provide power for the controller, and the rear end of the battery has a switch plug line 7 and a charging plug line 8, respectively, the switch plug line 7 is connected to the switch seat, and the charging plug line 8 is connected to the charging seat, so as to realize the plug-in connection, facilitate the subsequent disassembly and installation, and facilitate the charging and discharging of the battery.

[0040] (2) Controller part: Figure 3As shown, a controller is installed at the front of the battery. The controller is installed in a fixing box 4 and fixed by a controller fixing screw. The battery and the controller are connected by two connecting screws, so that the controller and the battery are connected as one.

[0041] (3) Connection wire part: There are two wires that need to be connected between the battery and the controller, one is the power plug wire between the power supply and the battery, and the other is the plug wire of the meter, such as Figure 5 As shown, in order to conceal the two plug wires and not affect the assembly of the battery system, they are deliberately placed in the gaps on both sides of the controller and the fixing box 4. This design is both beautiful and simple.

[0042] The specific design scheme is: the lower tube 16 of the frame 2 is provided with a storage groove corresponding to the battery, and the head tube 14 of the frame 2 is also provided with a similar truncated access groove, so that the battery system can be easily placed in the lower tube 16 of the frame 2 through the access groove. After the battery system is inserted, the No. 1 airbag 3 and the No. 2 airbag 12 are inflated through the valve core, so that the No. 1 airbag 3 and the No. 2 airbag 12 are inflated and expanded. The No. 1 airbag 3 is inflated and expanded outward to fix the battery system and the lower tube 16, and the No. 2 airbag 12 is inflated and expanded inward to block the inside of the battery shell 1, which can prevent dust or water from entering the battery system through the gap; four M4 screw holes are designed on the head tube 14, and a head brand 15 cover is designed to cover the through hole of the head tube 14, such as Figure 6 As shown, the switch and charging port of the battery system are respectively installed on both sides of the lower tube 16 of the frame 2 near the head tube 14. The switch seat and the charging seat are respectively fixed to the frame 2 by fixing screws. When the battery needs to be repaired, the bolts at the front end of the head plate 15 are first removed, and the head plate 15 is removed. Then, the switch button at the front end of the fixing box 4 is pressed to control the self-locking motor 9 to rotate, and the traction rope 10 wound on the output shaft is wound. The traction rope 10 is pulled. Since the traction rope 10 passes through the guide groove and is connected to the connecting plate 11, when the traction rope 10 is wound, the connecting plate 11 moves upward, and the battery pack 17 pressed on the top of the connecting plate 11 is pushed upward and removed from the battery shell 1. After that, the maintenance personnel can continue to repair and replace the battery pack 17. Secondly, in this process, only the battery pack 17 moves, and the battery shell 1 does not move. Therefore, when the battery system is repaired, it is not necessary to remove the battery shell 1 to complete the placement of the battery pack 17, which reduces the difficulty of repair.

[0043] When the battery system is installed, the motor plug line 6 and the sensor plug line 5 of the battery system pass through the hole reserved at the bottom tube 16 of the frame 2 near the bottom bracket, and are connected to the rear hub motor and the sensor respectively.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electric vehicle downtube battery system, comprising a battery housing (1) and a vehicle frame (2), characterized in that: The outer surface of the battery housing (1) is provided with outer ring grooves near both ends, and a first airbag (3) is bonded to the inner surface of the outer ring groove near the outer surface of the battery housing (1). The inner surface of the battery housing (1) is provided with inner ring grooves near both ends, and a second airbag (12) is bonded to the inner surface of the inner ring groove near the inner surface of the battery housing (1). A vent pipe (13) is connected between the first airbag (3) and the second airbag (12) inside the battery housing (1). A fixing box (4) is fixedly installed at one end of the battery housing (1) by bolts, and a self-locking motor (9) is fixedly installed inside the fixing box (4) by bolts. An output shaft is movably mounted at the center of the front end outer surface of the self-locking motor (9), and two traction ropes (10) are wound around the outer surface of the output shaft. Guide grooves are provided on both inner walls of the battery housing (1), and pulleys are provided on both inner walls of the battery housing (1) near the top of the guide grooves. A connecting plate (11) is movably mounted inside the battery housing (1), and the ends of the two traction ropes (10) away from the self-locking motor (9) pass through the guide grooves and are connected to the top outer surface of the connecting plate (11). A head pipe (14) is welded to the front end outer surface of the frame (2), and a down pipe (16) is welded between the bottom end of the frame (2) and the outer surface of the head pipe (14). A receiving and releasing groove is formed through the inner center of the lower tube (16); the battery housing (1) is movably mounted on the inner surface of the receiving and releasing groove; a taking and releasing groove is formed through the head tube (14) near the receiving and releasing groove; and a head plate (15) is fixedly mounted on the front end outer surface of the head tube (14) near the taking and releasing groove by means of bolts; The end of the battery housing (1) away from the fixing box (4) is connected to a switch plug line (7), a charging plug line (8) and a meter plug line, and the switch plug line (7) is located at the front end of the charging plug line (8), and the meter plug line is located between the switch plug line (7) and the charging plug line (8). The top end of the switch plug line (7) is connected to a switch seat, and the front end of the charging plug line (8) is connected to a charging seat. The switch seat and the charging seat are respectively mounted on the outer surfaces of both sides of the lower tube (16) by bolts; Five battery packs (17) are mounted on the top outer surface of the connecting plate (11), and a top cover (18) is welded to the top outer surface of the battery pack (17); Six 18650 battery cells are arranged inside the battery pack (17), and the 18650 battery cells are in the shape of a cylinder.

2. The electric vehicle downtube battery system according to claim 1, characterized in that: The end of the fixing box (4) away from the battery housing (1) is connected to a sensor plug line (5) and a motor plug line (6), and the motor plug line (6) is located below the sensor plug line (5).

3. The electric vehicle downtube battery system according to claim 1, characterized in that: A waterproof rubber pad is bonded to the inside of the battery housing (1) near the battery pack (17), and a waterproof film is bonded to the outer surface of the battery housing (1). The front outer surface of the fixing box (4) is provided with a plurality of switch buttons.

4. The electric vehicle downtube battery system according to claim 1, characterized in that: One end of the vent pipe (13) away from the first airbag (3) is connected to a valve core, and the valve core is mounted on the outer surface of the bottom end of the fixing box (4).

5. The electric vehicle downtube battery system according to claim 2, characterized in that: The end of the motor plug wire (6) away from the fixing box (4) is connected to the motor, the end of the sensor plug wire (5) away from the fixing box (4) is connected to the sensor, the sensor includes a torque sensor and a speed sensor, and the end of the meter plug wire away from the battery housing (1) is connected to the meter.

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