Battery Pack Fixing System

Abstract

The present invention discloses a battery pack fixing system, which includes a locking mechanism. The locking mechanism is disposed on the contact surface between the battery pack and the bracket. By rotating the locking mechanism, the battery pack is unlocked or locked on the bracket. This battery pack fixing system unlocks or locks the battery pack on the bracket by using the rotational movement of the locking mechanism in different directions, so as to achieve the purpose of fixing the battery pack on the bracket, and has the advantages of more reliable fixing and higher reliability compared with the traditional locking mechanism.

Description

Technical Field

[0001] The present invention relates to the field of battery swapping, and particularly to a battery pack fixing system. Background Art

[0002] In the prior art, fixing a battery pack on a bracket is usually achieved through a locking mechanism provided on the bracket. The locking block on the locking mechanism locks the battery pack through horizontal displacement, resulting in poor fixing firmness of the battery pack and easily locking the position of the battery pack when it is not properly placed, causing the electrical connector between the battery pack and the bracket to be not properly plugged in, affecting the normal use of the vehicle. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect of poor fixing firmness of the locking mechanism for locking the position of the battery pack in the prior art, and to provide a battery pack fixing system.

[0004] The present invention solves the above technical problem through the following technical solutions:

[0005] A battery pack fixing system includes a locking mechanism, which is arranged on the contact surface between the battery pack and the bracket. By rotating the locking mechanism, the battery pack is unlocked or locked on the bracket.

[0006] This battery pack fixing system unlocks or locks the battery pack on the bracket by using the rotational movement of the locking mechanism in different directions, so as to achieve the purpose of fixing the battery pack on the bracket, and has the advantages of more reliable fixing and high reliability compared with the traditional locking mechanism.

[0007] Preferably, the locking mechanism includes a rotating plug and a limiting member. The rotating plug and the limiting member are respectively arranged on the bracket and the battery pack. By driving the rotating plug to rotate, the rotating plug is limited by the limiting member.

[0008] Through the above structural arrangement, the locking mechanism realizes the functions of locking and unlocking the position between the battery pack and the bracket by using the rotation of the rotating plug relative to the limiting member.

[0009] Preferably, an electrical connector is arranged on the contact surface where the battery pack and the bracket are in contact. The electrical connector includes a battery terminal electrical connector on the contact surface of the battery pack and a vehicle terminal electrical connector on the contact surface of the bracket;

[0010] The rotating plug and the limiting member are respectively arranged on the contact surface of the bracket and the contact surface of the battery pack.

[0011] With this structural arrangement, the positions of the battery pack and the bracket can be locked by the locking mechanism, improving the mating state of adjacent electrical connectors and thus enhancing the electrical connection reliability of the battery pack.

[0012] Preferably, when the battery-side electrical connector is inserted relative to the vehicle-side electrical connector, the rotating plug rotates and is limited by the limiting member to prevent the situation where the positions between the battery pack and the bracket are locked but the electrical connectors are not properly mated.

[0013] Preferably, when the battery-side electrical connector is inserted relative to the vehicle-side electrical connector, the locking mechanism can apply a pulling force to the limiting member along the insertion direction of the electrical connector, so that the battery pack and the bracket are further pressed against each other through this pulling force, thereby ensuring the proper mating of the electrical connectors.

[0014] Preferably, the locking mechanism applies the pulling force to the limiting member through the rotation of the rotating plug, so as to utilize the rotation movement of the rotating plug to simultaneously achieve the two purposes of locking the battery pack and the bracket and applying a pulling force to the battery pack and the bracket to tightly insert the battery pack onto the bracket.

[0015] Preferably, when the battery-side electrical connector is pulled out relative to the vehicle-side electrical connector, the rotating plug rotates and is released from the limitation of the limiting member, enabling the battery pack to be detached from the bracket.

[0016] Preferably, when the battery-side electrical connector is pulled out relative to the vehicle-side electrical connector, the locking mechanism can apply a pushing force to the limiting member along the pulling-out direction of the electrical connector, so that the battery pack and the bracket are separated through this pushing force, ensuring the quick separation of the electrical connectors.

[0017] Preferably, the locking mechanism applies the pushing force to the limiting member through the rotation of the rotating plug, so as to utilize the rotation movement of the rotating plug to simultaneously achieve the two purposes of unlocking the battery pack and the bracket and applying a pushing force to the battery pack and the bracket to detach the battery pack from the bracket.

[0018] Preferably, the limiting member is provided on the contact surface of the battery pack, and the rotating plug is provided on the contact surface of the bracket.

[0019] Preferably, the limiting member has a receiving cavity, and the rotating plug enters or leaves the receiving cavity through rotation. The receiving cavity can limit the rotating plug located within the receiving cavity, so that the rotating plug enters the interior of the limiting member through a rotational movement and achieves the purpose of being limited relative to the limiting member.

[0020] Preferably, the rotating plug includes a plug head and a driving portion, the driving portion is connected to the plug head, and the driving portion is used to drive the plug head to rotate.

[0021] Preferably, the plug head includes a locking head and a locking head rotating shaft. The locking head rotating shaft is arranged on the bracket, the locking head is connected to the locking head rotating shaft, and the driving part is connected to the locking head rotating shaft to drive the locking head to flip up and down with the axis of the locking head rotating shaft as the center, so as to achieve the purpose of linkage rotation.

[0022] Preferably, the rotating plug includes at least two locking heads, and the locking heads are evenly distributed at both ends of the locking head rotating shaft. The limiting parts of the limiting parts are arranged in one-to-one correspondence with the plug head, so as to improve the fixing firmness of the locking mechanism by means of separate locking.

[0023] Preferably, the driving part includes a connecting rod mechanism, and the connecting rod mechanism drives the locking head to flip through lever movement.

[0024] Preferably, the limiting part is arranged on the battery pack, and the rotating plug is arranged on the bracket;

[0025] The connecting rod mechanism is arranged on the lower surface of the bracket, and the rotation fulcrum of the connecting rod mechanism is positioned on the battery support beam of the bracket.

[0026] Preferably, a limiting device is arranged on the surface of the battery support beam, and the limiting device is used to limit the lever movement of the connecting rod mechanism, so as to play a role when it is necessary to stop the lever movement of the connecting rod mechanism to lock the battery pack by the locking mechanism.

[0027] Preferably, the limiting device is a positioning pin, and the positioning pin is used to limit the relative position of the connecting rod mechanism relative to the battery support beam, so as to achieve the purpose of locking the lever movement of the connecting rod mechanism in a relatively simple way.

[0028] Preferably, the battery pack fixing system further includes a positioning pin plugging and unplugging mechanism, and the positioning pin plugging and unplugging mechanism is used to plug and unplug the positioning pin to achieve the purpose of contact locking.

[0029] Preferably, the driving part further includes a lifting machine. The lifting machine is located below the bracket, and the lifting machine pushes and / or pulls the connecting rod mechanism in the vertical direction to drive the locking head to flip by using the lifting machine to output a relatively large locking force.

[0030] Preferably, a lifting cushion block is arranged on the lifting plane of the lifting machine, and the lifting cushion block directly acts on the lower surface of the connecting rod mechanism.

[0031] Preferably, the position of the lifting cushion block relative to the connecting rod mechanism can be changed, so as to change the acting point of the lifting machine on the lower surface of the connecting rod mechanism in this way, and achieve the purpose of rotating the locking head in the first direction or the second direction.

[0032] Preferably, the limiting member includes a limiting portion having an opening and the receiving cavity. The opening is disposed on one side of the receiving cavity along a direction perpendicular to the insertion direction of the electrical connector, and the opening is for allowing the plug head to turn in and out of the receiving cavity.

[0033] Preferably, the plug head applies a thrust or a pulling force to the wall surface of the receiving cavity through turning in the receiving cavity, so that while the locking mechanism is locked and unlocked, the pushing and pulling actions of the battery pack within a specified forming range can also be achieved through the turning motion.

[0034] The positive and progressive effects of the present invention are as follows:

[0035] This battery pack fixing system unlocks or locks the battery pack on the bracket by using the rotational movements of the locking mechanism in different directions, so as to achieve the purpose of fixing the battery pack on the bracket, and has the advantages of more reliable fixing and high reliability compared with the traditional locking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of a battery pack fixing system according to an embodiment of the present invention.

[0037] Figure 2 It is a schematic structural diagram of a bracket according to an embodiment of the present invention.

[0038] Figure 3 is Figure 2 A partial enlarged view of part A in

[0039] Figure 4 It is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

[0040] Figure 5 is Figure 4 A partial enlarged view of part B in

[0041] Figure 6 It is a schematic flow diagram of an installation method of a battery pack according to an embodiment of the present invention.

[0042] Figure 7 It is a schematic diagram of the movement of the locking mechanism of an installation method of a battery pack according to an embodiment of the present invention.

[0043] Figure 8 It is a schematic flow diagram of a disassembly method of a battery pack according to an embodiment of the present invention.

[0044] Figure 9 It is a schematic diagram of the movement of the locking mechanism of a disassembly method of a battery pack according to an embodiment of the present invention.

[0045] Figure 10 It is a schematic diagram of the movement of a rotary plug of a battery pack fixing system according to an embodiment of the present invention.

[0046] Description of the reference numerals:

[0047] Locking mechanism 1

[0048] Rotating plug 11

[0049] Plug head 111, lock head 111a, lock head rotating shaft 111b

[0050] Driving part 112, link mechanism 112a, rotating fulcrum 112b

[0051] Limiting part 12

[0052] Limiting portion 121, accommodating cavity 121a, opening 121b

[0053] Battery pack 2

[0054] Bracket 3, battery support beam 31, limiting device 32

[0055] Electrical connector 4, battery terminal electrical connector 41, vehicle terminal electrical connector 42

[0056] Lifting machine 6, lifting plane 61

[0057] Lifting cushion block 7 Detailed implementation manners

[0058] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the described embodiments.

[0059] As Figure 1 shown, the present invention provides a battery pack 2 fixing system, which includes a locking mechanism 1. The locking mechanism 1 is arranged on the contact surface between the battery pack 2 and the bracket 3. Specifically, the locking mechanism 1 includes a rotating plug 11 and a limiting part 12. The rotating plug 11 is arranged on the bracket 3, and the limiting part 12 is arranged on the battery pack 2. When the battery pack 2 is placed on the bracket 3, by driving the rotating plug 11 to rotate, according to different rotation directions, the rotating plug 11 is limited or released from being limited by the limiting part 12. The battery pack 2 fixing system realizes the purpose of unlocking or locking the battery pack 2 on the bracket 3 by using the action of the rotating plug 11 of the locking mechanism 1 rotating along different directions. Compared with the traditional locking mechanism, the battery pack 2 fixing system has the advantages of more reliable fixation and high reliability. At the same time, because the structure is relatively simple, it is also convenient for daily maintenance and management.

[0060] Specifically, in this embodiment, the rotating plug 11 is arranged on the bracket 3, and correspondingly, the limiting member 12 is arranged on the battery pack 2. However, in other embodiments, the rotating plug 11 can also be arranged on the battery pack 2, and the limiting member 12 is correspondingly arranged on the bracket 3, so as to realize the position locking and unlocking between the battery pack 2 and the bracket 3 through the rotation of the rotating plug 11 arranged on the battery pack 2.

[0061] In addition, as Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, an electrical connector 4 is arranged on the contact surface where the battery pack 2 and the bracket 3 are in contact. The electrical connector 4 specifically includes a battery terminal electrical connector 41 arranged on the contact surface of the battery pack 2 and a vehicle terminal electrical connector 42 arranged on the contact surface of the bracket 3. For the locking mechanism 1, the rotating plug 11 and the limiting member 12 are respectively arranged on the contact surface of the battery pack 2 and the contact surface of the bracket 3, that is, the locking mechanism 1 and the electrical connector 4 are arranged on the same contact surface, so as to improve the plugging state of the electrical connector 4 adjacent to the locking mechanism 1 when the positions of the battery pack 2 and the bracket 3 are locked by the locking mechanism 1, thereby improving the electrical connection reliability of the battery pack 2.

[0062] As Figure 7 shown, when the battery terminal electrical connector 41 is inserted relative to the vehicle terminal electrical connector 42, the rotating plug 11 rotates and is limited by the limiting member 12, so as to realize the position locking between the battery pack 2 and the bracket 3 through the locking mechanism 1 during the plugging process of the electrical connector 4, and avoid the situation that the positions of the battery pack 2 and the bracket 3 are locked, resulting in the electrical connector 4 not being plugged in place. Further, when the battery terminal electrical connector 41 is inserted relative to the vehicle terminal electrical connector 42, the locking mechanism 1 can apply a pulling force to the limiting member 12 along the insertion direction of the electrical connector 4, so as to make the battery pack 2 and the bracket 3 fit closer through this pulling force, thereby ensuring the plugging of the electrical connector 4 in place.

[0063] As Figure 9 shown, when the battery terminal electrical connector 41 is pulled out relative to the vehicle terminal electrical connector 42, the rotating plug 11 rotates and is released from the limit of the limiting member 12, so that the battery pack 2 can be separated from the bracket 3. Further, when the battery terminal electrical connector 41 is pulled out relative to the vehicle terminal electrical connector 42, the locking mechanism 1 can apply a pushing force to the limiting member 12 along the pulling-out direction of the electrical connector 4, so as to help the battery pack 2 and the bracket 3 to realize the separation of the relative positions through this pushing force.

[0064] Among them, it should be specifically noted that for the electrical connector 4 used in vehicle-mounted batteries, the connection between the battery-side electrical connector 41 and the vehicle-side electrical connector 42 is usually relatively tight. Therefore, when installing or disassembling the battery pack 2, an external battery swapping device is required to insert the battery pack 2 into the bracket 3 or pull it out from the bracket 3. During this process, the main resistance to be overcome is the insertion and extraction force on the electrical connector 4. The locking mechanism 1, while physically locking or unlocking the battery pack 2 relative to the bracket 3 by rotation, can also apply a corresponding thrust or pull force to the battery pack 2 through rotation to overcome the above-mentioned insertion and extraction force of the electrical connector 4, achieving the purpose of quickly disassembling and assembling the battery pack 2.

[0065] At the same time, since the locking mechanism 1 is arranged on the contact surface between the battery pack 2 and the bracket 3, the force applied by the locking mechanism 1 to the battery pack 2 can be directly transmitted to the electrical connector 4 located on the contact surface, thus avoiding the situation where the shell of the battery pack 2 is deformed due to excessive or uneven force during the insertion and extraction of the battery pack 2 by a traditional external battery swapping device.

[0066] The rotating plug 11 includes a plug head 111 and a driving part 112. The driving part 112 is connected to the plug head 111, and the function of the driving part 112 is to drive the plug head 111 to rotate.

[0067] The limiting part 12 has a receiving cavity 121a, and the plug head 111 of the rotating plug 11 enters or leaves the receiving cavity 121a in a rotating manner under the drive of the driving part 112. When locking is required, the plug head 111 rotates clockwise to enter the receiving cavity 121a. After that, the plug head 111 realizes the physical limit of the receiving cavity 121a relative to the rotating plug 11 by abutting against the inner wall position of the receiving cavity 121a.

[0068] Specifically, the plug head 111 includes two parts, a lock head 111a and a lock head rotating shaft 111b. The lock head rotating shaft 111b is arranged on the bracket 3, and the lock head 111a is connected to the lock head rotating shaft 111b. The lock head 111a is the part where the plug head 111 directly enters the receiving cavity 121a. The driving part 112 drives the lock head 111a to turn up and down around the axis of the lock head rotating shaft 111b by connecting to the lock head rotating shaft 111b, achieving the purpose of linkage rotation.

[0069] Among them, as Figure 3 shown, the lock head rotating shaft 111b is connected to the middle position of the lock head 111a. The lock head 111a includes a first insertion part located in the upper part and a second insertion part located in the lower part. As Figure 7As shown, the first insertion part rotates towards the battery pack to pass through the accommodation cavity 121a in the limiting member 12 via the opening 121b. Then it rotates again, making the first insertion part rotate away from the battery pack, so that the first insertion part is limited by the limiting member 12. Similarly, the limiting member 12 includes a locking function at the end of the opening 121a for locking the first insertion part of the lock head 111a.

[0070] Meanwhile, the limiting member 12 includes a limiting part 121 which has an opening 121b and the above-mentioned accommodation cavity 121a. The opening 121b is arranged at the lower side position of the accommodation cavity 121a along the direction perpendicular to the insertion direction of the electrical connector 4, and this opening 121b is used for the plug head 111 to enter and exit the accommodation cavity 121a in a flipped manner. Further, when the plug head 111 flips in the accommodation cavity 121a, the plug head 111 can apply a thrust or a pull force to the wall surface of the accommodation cavity 121a, so as to realize the pushing and pulling action of the battery pack 2 within the specified formation range while locking and unlocking through the flipping motion.

[0071] The present invention also provides a method for installing the battery pack 2 on the bracket 3. As Figure 6 and Figure 7 shown, it is a schematic flow chart of locking the battery pack 2 on the bracket 3 by driving the locking mechanism 1 to rotate and making the rotating plug 11 move relative to the limiting member 12 in this embodiment. Specifically, during the locking process of the locking mechanism 1, there are two steps S11 and S12: First, in step S1, the battery pack 2 needs to be placed at the preset position of the bracket 3 by an external battery swapping device. In this embodiment, the preset position is actually a position where the distance between the contact surfaces of the battery pack 2 and the bracket 3 is 10 cm, that is, the position where the battery terminal electrical connector 41 and the vehicle terminal electrical connector 42 are close but not plugged. At the same time, the lock head 111a of the driving rotating plug 11 is rotated counterclockwise (i.e., the first direction C) to avoid interference between the lock head 111a and the limiting part 121 of the limiting member 12, and at the same time, the lock head 111a is rotated to the position of the opening 121b of the limiting part 121.

[0072] After that, in step S12, the lock head 111a of the driving rotary plug-in 11 is rotated in the clockwise direction (i.e., the second direction D), so that the lock head 111a enters the accommodation cavity 121a from the opening 121b and finally abuts against the inner wall surface of the accommodation cavity 121a. On this basis, through further rotation of the lock head 111a, the lock head 111a applies a thrust force to the inner wall surface of the accommodation cavity 121a, so as to transmit the force and enable the locking mechanism 1 to apply a pulling force to the locking area of the battery pack 2, driving the battery pack 2 to move in the direction close to the bracket 3, making the contact surfaces of the two in contact, and completing the plugging between the battery terminal electrical connector 41 and the vehicle terminal electrical connector 42. Alternatively, during the process of the lock head 111a rotating in the clockwise direction (i.e., the second direction D), the battery pack can be pushed towards the bracket by an external force, so that the lock head 111a does not apply a force to the accommodation cavity 121a during the rotation process.

[0073] In addition, in the above method of installing the battery pack 2 on the bracket 3, step S10 may further be included. This step S10 is to place the battery pack 2 on the lifting bracket 3 and control the lifting bracket 3 to lift the battery pack 2 to the height of the installation position before the external battery swapping device horizontally pushes the battery pack 2 to the preset position of the bracket 3.

[0074] In this embodiment, the locking mechanism 1 acts on the locking area of the battery pack 2, and the moving stroke thereof is matched with the plugging stroke of the electrical connector 4. The specific meaning of the stroke matching here is that when the locking mechanism 1 locks the battery pack 2 in place, the electrical connector 4 is plugged in. Therefore, before that, the battery pack 2 must be horizontally pushed to the preset position of the bracket 3 by an external battery swapping device so that the locking mechanism 1 can function.

[0075] To enable the above battery swapping device to accurately place the battery pack 2 at the preset position, a sensor should also be provided at the preset position of the bracket 3. When the battery reaches the preset position, the sensor emits a signal indicating that it has arrived, causing the battery swapping device to stop working and the locking mechanism 1 to start working.

[0076] Preferably, a position sensor (not shown in the figure) is also provided on the bracket 3. This position sensor is used to detect and control the rotation angle of the locking mechanism 1 to stop rotating when the lock head 111a of the locking mechanism 1 rotates to a specific position, realizing the function of locking in place. In addition, to prevent the position sensor from failing or the rotation angle of the lock head 111a of the locking mechanism 1 from being too large, a limiting mechanism for restricting rotation should also be provided on the bracket 3. This mechanism can be a stop block to achieve the purpose of physical limitation, so that the rotation angle of the lock head 111a of the rotation limiting mechanism will not be too large, avoiding damage to the locking area of the battery pack 2 and deformation of the battery pack 2 housing.

[0077] In addition, the present invention further provides a method for disassembling the battery pack 2 relative to the bracket 3. This method is used to disassemble the battery pack 2 mounted on the bracket 3 from the bracket 3. As Figure 8 and Figure 9 shown, in this embodiment, it is a schematic flow chart of unlocking the battery pack 2 relative to the bracket 3 by driving the locking mechanism 1 to rotate so that the rotating plug 11 moves relative to the limiting member 12. Similar to the method of mounting the battery pack 2 on the bracket 3 described above, during the unlocking process of this unlocking method, the locking mechanism 1 applies a thrust to the locking area of the battery pack 2 to synchronously achieve the purpose of separating the battery terminal electrical connector 41 and the vehicle terminal electrical connector 42.

[0078] Specifically, during the unlocking process of the locking mechanism 1, there are two steps, S21 and S22: First, in step S21, it is necessary to drive the lock head 111a of the locking mechanism 1 to rotate counterclockwise (the first direction C) so that the lock head 111a moves towards the opening 121b. During this process, the lock head 111a abuts against the inner wall surface of the receiving cavity 121a. On this basis, by further rotating the lock head 111a, the lock head 111a applies a thrust to the inner wall surface of the receiving cavity 121a. Through the transmission of force, the locking mechanism 1 applies a thrust to the locking area of the battery pack 2, driving the battery pack 2 to move away from the bracket 3, thereby making the contact surfaces of the two move away from each other, and separating the battery terminal electrical connector 41 and the vehicle terminal electrical connector 42. At the same time, during the process of the lock head 111a pushing the battery pack 2 to move through rotation, after the displacement of the battery pack 2, the lock head 111a can leave the receiving cavity 121a from the opening 121b. After leaving the receiving cavity 121a, the locking mechanism 1 stops applying a thrust to the locking area, and the locking mechanism 1 also unlocks the battery pack 2 relative to the bracket 3. It should be specifically noted that when the locking mechanism 1 stops applying a thrust to the battery pack 2 so that the battery pack 2 stops moving, the position of the battery pack 2 on the bracket 3 should be at a preset position. Or during the counterclockwise rotation of the lock head 111a, the battery pack 2 is pulled away from the bracket 3 by an external force, that is, during the rotation process, the locking mechanism 1 does not apply a force to the battery pack 2.

[0079] After that, in step S22, the locking mechanism 1 is driven to rotate clockwise (the second direction D), so that the lock head 111a of the locking mechanism 1 disengages from the locking area of the battery pack 2 located at the preset position of the bracket 3. At the same time, the external battery swapping device should remove the battery pack 2 from the preset position of the bracket 3 to achieve the purpose of disassembling the battery pack 2.

[0080] Similarly to the above-described method for installing the battery pack 2, in the method for disassembling the battery pack 2, step S23 may further be included. This step S23 is to place the battery pack 2 on the lifting bracket 3 after the external battery swapping device horizontally removes the battery pack 2 from the preset position of the bracket 3, and control the lifting bracket 3 to lower the battery pack 2 from the height of the installation position, so as to achieve the purpose of recycling the battery pack 2.

[0081] In addition, the in-place sensor and the rotation limit mechanism that function in the method for installing the battery pack 2 can also play the same role in the method for disassembling the battery pack 2, so they will not be elaborated here.

[0082] In this embodiment, the locking mechanism 1 needs to pull the battery pack 2 to displace and perform the locking process after the external battery swapping device places the battery pack 2 at the preset position of the bracket 3. This battery swapping device is an existing product, so its specific structure and principle will not be elaborated here.

[0083] In addition, in this embodiment, a single rotating plug 11 includes two locking heads 111a, which are respectively arranged at both ends of the locking head rotating shaft 111b. Correspondingly, the number of the limiting members 12 is the same as that of the locking heads 111a, and they are arranged in one-to-one correspondence to improve the fixing firmness of the locking mechanism 1 by means of separate locking. At the same time, as Figure 3 shown, two sets of relatively independent locking mechanisms 1 are respectively arranged on the left and right sides of the bracket 3 to jointly fix the battery pack 2 and apply a force to the electrical connector 4 located between the two sets of locking mechanisms 1.

[0084] As Figure 10 shown, the driving part 112 includes a link mechanism 112a, which drives the locking head rotating shaft 111b to rotate through a lever motion, and further realizes the flipping of the locking head 111a. Among them, regarding the specific principle of the link mechanism 112a, since it belongs to the category of existing technologies, it will not be elaborated here. Since the rotating plug 11 in this embodiment is arranged on the bracket 3, the link mechanism 112a is arranged at the lower surface position of the bracket 3, and the rotation fulcrum 112b of the link mechanism 112a is positioned on the battery support beam 31 at the lower half of the bracket 3 and is located below the battery pack 2.

[0085] A limiting device 32 is provided on the surface of the battery support beam 31. The limiting device 32 is used to limit the lever movement of the link mechanism 112a, so as to play a role when it is necessary to stop the lever movement of the link mechanism 112a to lock the battery pack 2 by the locking mechanism 1. In this embodiment, the limiting device 32 realizes the limit in the way of pin positioning. When the link mechanism 112a drives the lock head 111a to move to the position where the battery pack 2 is locked on the bracket 3, the lever of the link mechanism 112a is locked at a specific position of the battery support beam 31 through the positioning pin, so as to achieve the purpose of locking the lever movement of the link mechanism 112a in a relatively simple way.

[0086] The battery pack 2 fixing system further includes a positioning pin inserting and extracting mechanism (not shown in the figure). The function of the positioning pin inserting and extracting mechanism is to extract the positioning pin from the link mechanism 112a and the battery support beam 31 to achieve the purpose of releasing the lock.

[0087] In addition, in this embodiment, a relatively simple implementation method is given for how the link mechanism 112a of the locking mechanism 1 generates lever movement to realize the flipping of the lock head 111a.

[0088] In this embodiment, the driving part 112 further includes a lifting machine 6. The lifting machine 6 is arranged below the bracket 3. During the upward pushing process of the lifting machine 6, its lifting plane 61 pushes the lower surface of the link mechanism 112a in the vertical direction, so that the link mechanism 112a rotates relative to its rotation fulcrum 112b. Under the action of this rotational movement, the link mechanism 112a further drives the lock head 111a to rotate along the first direction C or the second direction D to achieve the purpose of unlocking and locking.

[0089] Among them, in order to make the lock head 111a rotate along the completely opposite first direction C or second direction D, if the lifting machine 6 uses the method of abutting against the lower surface of the link mechanism 112a to push the link mechanism 112a to flip, then the lifting machine 6 and the link mechanism 112a must be located on both sides of the rotation fulcrum 112b respectively. In this case, a movable lifting pad 7 can be provided on the lifting plane 61 of the lifting machine 6. By moving the lifting pad 7, the acting point of the lifting machine 6 on the lower surface of the link mechanism 112a is changed, so as to achieve the purpose of making the lock head 111a rotate along the first direction C or the second direction D.

[0090] Of course, in other embodiments, the lift 6 can also remain connected to the same position on the linkage mechanism 112a, so as to drive the lock head 111a to rotate in the first direction C or the second direction D by applying a thrust upward or a pull downward respectively. Additionally, preferably, the positioning pin inserting and extracting mechanism can also be arranged on the lifting plane 61 of the lift 6 to drive the positioning pin inserting and extracting mechanism to approach the linkage mechanism 112a and the positioning pin while the lift 6 is working.

[0091] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only for illustration purposes. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A battery pack fixing system, characterized in that, It includes a locking mechanism which is arranged on the contact surface between the battery pack and the bracket. By rotating the locking mechanism, the battery pack can be unlocked or locked on the bracket. The locking mechanism includes a rotating plug and a limiting member. The rotating plug and the limiting member are respectively arranged on the bracket and the battery pack. By driving the rotation of the rotating plug, the rotating plug is limited by the limiting member. An electrical connector is arranged on the contact surface where the battery pack and the bracket are in contact. The electrical connector includes a battery terminal electrical connector on the contact surface of the battery pack and a vehicle terminal electrical connector on the contact surface of the bracket. The rotating plug and the limiting member are respectively arranged on the contact surface of the bracket and the contact surface of the battery pack. When the battery terminal electrical connector is inserted relative to the vehicle terminal electrical connector, the locking mechanism can apply a pulling force to the limiting member along the insertion direction of the electrical connector.

2. The battery pack fixing system according to claim 1, wherein When the battery terminal electrical connector is pulled out relative to the vehicle terminal electrical connector, the rotating plug rotates and is released from the limit of the limiting member.

3. The battery pack fixing system according to claim 2, wherein When the battery terminal electrical connector is pulled out relative to the vehicle terminal electrical connector, the locking mechanism can apply a pushing force to the limiting member along the pulling-out direction of the electrical connector.

4. The battery pack fixing system according to claim 3, characterized in that, The locking mechanism applies the pushing force to the limiting member through the rotation of the rotating plug.

5. The battery pack fixing system according to any one of claims 1-4, characterized in that, The limiting member has a receiving cavity. The rotating plug enters or leaves the receiving cavity through rotation, and the receiving cavity can limit the rotating plug located within it.

6. The battery pack fixing system according to claim 5, wherein, The rotating plug includes a plug head and a driving part. The driving part is connected to the plug head, and the driving part is used to drive the rotation of the plug head.

7. The battery pack fixing system according to claim 6, wherein The plug head includes a lock head and a lock head rotating shaft. The lock head rotating shaft is arranged on the bracket, the lock head is connected to the lock head rotating shaft, and the driving part is connected to the lock head rotating shaft to drive the lock head to flip up and down around the axis of the lock head rotating shaft.

8. The battery pack fixing system according to claim 7, characterized in that, The rotating plug includes at least two lock heads, and the lock heads are evenly distributed at both ends of the lock head rotating shaft. The limiting member is arranged in one-to-one correspondence with the plug head.

9. The battery pack fixing system according to claim 7, wherein, The driving part includes a link mechanism, and the link mechanism drives the flipping of the lock head through a lever movement.

10. The battery pack fixing system according to claim 9, wherein the link mechanism is arranged on the lower surface of the bracket, and the rotation fulcrum of the link mechanism is positioned on the battery support beam of the bracket.

11. The battery pack fixing system according to claim 10, wherein, A limiting device is arranged on the surface of the battery support beam, and the limiting device is used to limit the lever movement of the link mechanism.

12. The battery pack fixing system according to claim 11, wherein, The limiting device is a positioning pin, and the positioning pin is used to limit the relative position of the link mechanism relative to the battery support beam.

13. The battery pack fixing system according to claim 12, wherein The battery pack fixing system further includes a positioning pin insertion and extraction mechanism, and the positioning pin insertion and extraction mechanism is used to insert and extract the positioning pin.

14. The battery pack fixing system according to claim 10, wherein, The driving part further includes a lifting machine. The lifting machine is located below the bracket, and the lifting machine pushes and / or pulls the link mechanism in the vertical direction.

15. The battery pack fixing system according to claim 14, wherein, A lifting cushion block is arranged on the lifting plane of the lifting machine, and the lifting cushion block directly acts on the lower surface of the link mechanism.

16. The battery pack fixing system according to claim 15, wherein, The position of the lifting pad relative to the linkage mechanism is changeable.

17. The battery pack fixing system according to claim 6, wherein, The limiting member includes a limiting portion which has an opening and the accommodating cavity. The opening is arranged on one side of the accommodating cavity along a direction perpendicular to the insertion direction of the electrical connector, and the opening is used for allowing the plug head to turn over and enter or exit the accommodating cavity.

18. The battery pack fixing system according to claim 17, wherein, The plug head applies a thrust or a pulling force to the wall surface of the accommodating cavity by turning over in the accommodating cavity.

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