Positioning sheet, positioning pin, positioning mechanism, quick change bracket assembly, and electric vehicle

Abstract

The present invention discloses a positioning sheet (1, 10), a positioning pin (2, 20), a positioning mechanism (3, 30), a quick change bracket assembly (4, 10, 40), and an electric vehicle. The positioning sheet (1, 10) is for positioning and fixing a battery pack (51, 61). The positioning sheet (1, 10) receives and fixes a positioning pin (2, 20) of the battery pack (51, 61). On the side (1, 10) of the positioning sheet, an opening (12) is provided to allow the positioning pin (2, 20) to enter a slide (11), and a slide (11) extending from the opening (12) is provided. A first position limiting part (13) is provided within the slide (11) to limit the positioning pin (2, 20) from moving out of the positioning sheet (1, 10) along the axial direction. A first position limiting member (13) is installed on a positioning sheet (1, 10), and the movement direction of a positioning pin (2, 20) is restricted using the first position limiting member (13) so that the positioning pin (2, 20) does not deviate from the positioning sheet (1, 10) along its axial direction, thereby realizing fixation of the battery pack (51, 61) using such a positioning pin (2, 20) in the axial direction. The present invention is advantageous for improving the lifespan of the battery pack (51, 61) by reducing the movement direction of the battery pack (51, 61) and lowering the complexity of the movement state of the battery pack (51, 61), and reduces the probability of damage to the battery pack (51, 61). At the same time, it is also advantageous for analyzing the cause of failure in the battery pack (51, 61).

Description

Technology Field

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese patent applications 201910569887.9, 201910568751.6, and 201910569923.1, filed on June 27, 2019. This application incorporates the entire contents of the said Chinese patent applications.

[0003] The present invention relates to the field of power exchange equipment, and in particular to a positioning seat, a positioning pin, a positioning mechanism, a quick change bracket assembly, and an electric vehicle. Background Technology

[0004] The mounting methods of battery packs in existing electric vehicles are generally classified into fixed and replaceable types.

[0005] Here, a fixed battery pack is typically secured to a vehicle, and when charging, the vehicle is used as the direct target. When connected to the vehicle body, the fixed battery pack is positioned using pins and secured using bolts. The securing effect of this positioning and fixing method is very good, as it can basically guarantee fixation in three directions: X, Y, and Z. However, replacing the battery pack presents various difficulties, making it difficult to smoothly disassemble the battery. Furthermore, repeated loosening of the bolts increases the probability that the bolts will lose their effectiveness, thereby creating a certain risk.

[0006] Replaceable battery packs generally utilize a movable mounting method, allowing the battery pack to be removed and replaced with a new one at any time. Currently, when an existing replaceable battery pack is connected to a vehicle body, a locking mechanism is typically used between the battery pack and the vehicle body. This locking mechanism generally includes a lock shaft and a lock seat; the lock shaft is typically installed on the battery pack, the lock seat is installed on the vehicle body, and a slide is installed on the lock seat. The battery pack is typically mounted from the bottom of the vehicle body. The lock shaft enables the mounting of the battery pack by allowing the battery pack to enter the slide of the lock seat from below, and then allowing the battery pack to move back into place along the X direction. This mounting method typically involves floating only the battery pack and does not fix it after floating; that is, the lock shaft moves in the three directions of X, Y, and Z relative to the slide. In this case, the battery pack typically undergoes complex motion in the three directions of X, Y, and Z during vehicle operation, resulting in a high failure rate and making it difficult to determine the cause of failure after it occurs. Furthermore, due to the complex motion of the battery pack, force analysis becomes complex when a force analysis is performed on the battery pack.

[0007] To summarize the above, the connection method of fixed battery packs in current electric vehicles is not easy to disassemble, and the connection method of replaceable battery packs does not allow for securing the battery in the X, Y, or Z directions, leading to easy failure of the battery pack.

[0008] The technical problem that the present invention aims to solve is to provide a positioning sheet, a positioning pin, a positioning mechanism, a quick change bracket assembly, and an electric vehicle in order to overcome the defects existing in the prior art.

[0009] The present invention solves the above technical problem through the following technical solution.

[0010] The present invention provides a positioning sheet for positioning and fixing a battery pack, wherein the positioning sheet receives and fixes a positioning pin of the battery pack, and on the side of the positioning sheet, an opening and a slide extending from the opening are installed, the opening is for allowing the positioning pin to enter the slide; and within the slide, a first position limiting part is installed to restrict the positioning pin from deviating from the positioning sheet along the axial direction.

[0011] In the present solution, by using the above structure, the movement direction of the positioning pin is restricted using a first position limiting member so that the positioning pin does not deviate from the positioning sheet along its axial direction, thereby realizing axial fixation of the battery pack using such a positioning pin. The present solution is advantageous for reducing the movement of the battery pack, thereby lowering the complexity of the battery pack's movement state, improving the battery pack's lifespan, and reducing the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0012] Preferably, the slide supports the positioning pin and has a support platform on which the first position limiting part is installed.

[0013] In the present solution, by using the above structure, the positioning pin is supported using a support platform, thereby making the positioning pin more robust.

[0014] Preferably, the cross-section of the first position limiting portion is one of an arc shape, a V shape, or a formulation shape.

[0015] In the present solution, by using the above structure, the cross-section of the first position limiting part is designed to be one of an arc shape, a V shape, or a formulation shape, thereby not only making it advantageous for the positioning sheet to implement a position limiting function but also simplifying the structural form of the first position limiting part to improve the usage cycle of the positioning sheet.

[0016] Preferably, the first position limiting portion is a projection, or the first position limiting portion is a depression;

[0017] Preferably, the projection has a first position limiting surface and a second position limiting surface, and the intersection point of the first position limiting surface and the second position limiting surface is the highest point of the projection;

[0018] and / or, the first position limiting surface and the second position limiting surface are flat or curved surfaces.

[0019] In the present solution, by using the above structure, the first position limiting part is designed as a protrusion or a depression, which not only makes it advantageous for the positioning sheet to implement a position limiting function but also simplifies the structural form of the first position limiting part, thereby improving the usage cycle of the positioning sheet.

[0020] In the present solution, by using the above structure, the structural form of the protrusion is simplified by designing it as a first position limiting surface and a second position limiting surface, thereby reducing the space occupied. Furthermore, the highest point of the protrusion is advantageous for improving positioning reliability.

[0021] In the present solution, by using the above structure, the structural form of the first position limiting surface and the second position limiting surface is simplified by configuring the first position limiting surface and the second position limiting surface using a flat or curved surface.

[0022] Preferably, the positioning sheet further comprises a relief portion, at least a portion of the relief portion is located within the slide, and when the positioning sheet is placed in a positioning state, the relief portion contacts the wall surface of the positioning pin;

[0023] Preferably, the above-mentioned relief part is an elastic sheet.

[0024] In the present solution, by using the above structure, the positioning pin absorbs a portion of the kinetic energy when transitioning to the positioning state using a damping member, thereby being advantageous for reducing the impact of the positioning pin on the positioning sheet, reducing noise when the positioning pin is positioned, and improving the rigidity of the positioning pin when it is in the positioning state.

[0025] In this solution, by using the above structure, the cost of the cushioning part is reduced and the cushioning effect of the cushioning part is improved by using an elastic sheet as the cushioning part.

[0026] A positioning sheet for positioning and fixing a battery pack comprises a positioning sheet body, and on the side of the positioning sheet body, an opening and a slide extending from the opening are installed, wherein the opening is intended to allow a positioning pin of the battery pack to enter the slide, and the positioning sheet further comprises a clamping device, wherein the clamping device is installed within the slide and, when the positioning pin is placed at a positioning point, the clamping device contacts the positioning pin along a vertical direction.

[0027] In the present solution, by using the above structure, a clamping device is installed within the slide to ensure that a positioning pin placed at a positioning point is firmly clamped, and furthermore, the positioning pin is prevented from moving along the vertical direction so that the positioning pin is fixed in the vertical direction. In addition, a positioning mechanism using a positioning sheet, a quick-change bracket assembly, and a battery pack of an electric vehicle are positioned and fixed in the vertical direction. The present solution is advantageous for reducing the movement of the battery pack, thereby lowering the complexity of the battery pack's movement state and improving the battery pack's lifespan, and reducing the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0028] Preferably, the clamping device is installed at the positioning point of the positioning pin within the slide.

[0029] In the present solution, by using the above structure, the clamping device is installed at the positioning point, thereby making the positioning pin more rigid at the positioning point and reducing the probability of the positioning pin unexpectedly moving from the positioning point.

[0030] Preferably, the clamping device comprises a swing body and a fixed axis, wherein the fixed axis is connected to the positioning sheet body, and the swing body can rotate around the fixed axis; and when the positioning pin is positioned at a positioning point, the swing body contacts the outer wall of the positioning pin;

[0031] Preferably, the swing body has an arc surface that contacts the outer wall of the positioning pin;

[0032] and / or, if the positioning pin has not entered the slide, the swing body swings toward the entrance of the slide;

[0033] and / or, the clamping device comprises two clamping assemblies, each clamping assembly comprising one swing body and one fixed axis, and the two clamping assemblies are installed symmetrically on both sides of the slide;

[0034] Preferably, when the positioning pin is positioned at a positioning point, the centerline of the positioning pin forms a coplane with the centerlines of the two fixed axes;

[0035] Preferably, the clamping device further includes an elastic member installed between the positioning sheet body and the swing body and acting on the swing body so that when the swing body is not subjected to force, the contact surface of the swing body is directed toward the direction in which the positioning pin slides in;

[0036] Preferably, one end of the elastic member is inserted into the swing body, and the other end of the elastic member is in contact with the positioning sheet body;

[0037] and / or, the elastic member is a spring.

[0038] In the present solution, by using the above structure, the structure of the clamping device is simplified by using a swing body and a fixed axis, and the swing body can rotate around the fixed axis, thereby allowing the swing body to more easily switch to a positioning state, and also improves the rigidity of the positioning pin at the positioning point.

[0039] In the present solution, by using the above structure, the arc surface of the swing body is utilized to contact the positioning pin, thereby improving the rigidity of the positioning pin at the positioning point.

[0040] In the present solution, by using the above structure, the swing body is swung at the entrance, allowing the positioning pin to enter the swing body more easily, and the rigidity of the positioning pin within the swing body is also improved.

[0041] In the present solution, by using the above structure, when a positioning pin is placed at a positioning point using symmetrically installed clamping assemblies, the two groups of clamping assemblies simultaneously clamp the positioning pin, thereby improving the rigidity of the positioning sheet.

[0042] In this solution, by using the above structure, the centerline of the positioning pin and the centerlines of the two fixed axes are designed to be coplanar, so that when the positioning pin is placed at the positioning point, the distance between the positioning pin and the two fixed axes is minimized, causing the two swing bodies to clamp the positioning pin more firmly. Since the axial force received by the positioning pin is greatest at this time, it is difficult for the positioning pin to move away from the positioning point, thereby improving the rigidity of the positioning sheet.

[0043] In the present solution, by using the above structure, the positioning pin is oriented in the direction in which it slides into the swing body by using an elastic member, thereby allowing the positioning pin to slide smoothly into the swing body, and furthermore, the clamping device becomes advantageous for clamping the positioning pin.

[0044] In the present solution, by using the above structure, the elastic member is inserted into the swing body and the positioning sheet body, thereby improving the rigidity of the elastic member, which makes it advantageous to apply elasticity to the swing body when replacing the elastic member.

[0045] In this solution, by using the above structure, the design form of the elastic member is simplified by using a spring, thereby improving the lifespan of the elastic member and reducing the cost of the positioning sheet.

[0046] Preferably, the positioning sheet further comprises a relief portion, at least a portion of the relief portion is located within the slide, and when the positioning pin is placed at a positioning point, the relief portion contacts the wall surface of the positioning pin;

[0047] Preferably, the above-mentioned relief part is an elastic sheet.

[0048] In the present solution, by using the above structure, the positioning pin absorbs a portion of the kinetic energy when transitioning to the positioning state using a damping member, thereby being advantageous for reducing the impact of the positioning pin on the positioning sheet, reducing noise when the positioning pin is positioned, and improving the rigidity of the positioning pin when it is in the positioning state.

[0049] In this solution, by using the above structure, the cost of the cushioning part is reduced and the cushioning effect of the cushioning part is improved by using an elastic sheet as the cushioning part.

[0050] In the positioning pin, the positioning pin is connected to a battery pack, and the positioning pin is combined with at least one positioning sheet as described above, and the positioning pin is provided with a second position limiting part in combination with the first position limiting part to limit the movement of the battery pack along the axial direction of the positioning pin.

[0051] In the present solution, by using the above structure, the rigidity of the positioning pin when it is placed in a positioning state is improved by utilizing a combination of the second position limiting part and the first position limiting part, thereby fixing the positioning pin in its axial direction and realizing the fixation of the battery pack in the axial direction using such a positioning pin. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of motion of the battery pack and lowering the complexity of the battery pack's motion state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0052] Preferably, the first position limiting part is a recess and the second position limiting part is a projection, and the number of the second position limiting parts is multiple, and the multiple projections are arranged along the axial direction of the positioning pin or the multiple projections are arranged along the radial direction of the positioning pin.

[0053] In this solution, by using the above structure, the rigidity of the positioning pin when it is placed in a positioned state is improved by utilizing the interlocking coupling of the protrusions and the recesses. At the same time, multiple protrusions are installed on the positioning pin to make it more rigid, thereby preventing it from easily detaching from the positioning sheet along its axial direction. Furthermore, the problem of the positioning state changing due to a single protrusion losing its effectiveness is prevented, thereby improving the safety factor of the positioning pin.

[0054] Preferably, the second position limiting part and the positioning pin are an overall structure;

[0055] Alternatively, the second position limiting part and the positioning pin are detachably connected;

[0056] Preferably, the second position limiting member is installed over the positioning pin;

[0057] Preferably, the second position limiting member is rotatable with respect to the positioning pin;

[0058] and / or, the positioning pin further includes an axle bumper installed on the cross-section of the positioning pin to prevent the second position limiting member from moving along the axial direction of the positioning pin;

[0059] and / or, the second position limiting part is a shaft sleeve, and the shaft sleeve and the slide are transiently coupled.

[0060] In this solution, by using the above structure, the second position limiting part and the positioning pin are designed as an overall structure, thereby simplifying the manufacturing process of the positioning pin and reducing the cost of the positioning pin. By designing the connection method between the second position limiting part and the positioning pin to be detachable, the second position limiting part and the positioning pin are designed and manufactured independently, and the performance of both is better suited to their respective usage environments, which is advantageous for improving the mass of the positioning pin.

[0061] In the present solution, by using the above structure, the second position limiting part is installed over the outer side of the positioning pin so that the second position limiting part is more sufficiently combined with the first position limiting part, thereby improving the rigidity with which the positioning pin is placed in the positioning state.

[0062] In the present solution, by using the above structure, the second position limiting part is designed to be rotatable, thereby reducing the resistance when the positioning pin enters the slide, which is advantageous for improving the service life of the positioning pin.

[0063] In the present solution, by using the above structure, the safety factor of the positioning pin is improved by preventing the second position limiting part from moving along the axial direction using the axle bumper.

[0064] In the present solution, by using the above structure, the positioning pin and the positioning sheet are made more rigid by using a shaft sleeve that is transiently coupled with the slide, thereby reducing the unexpected movement of the positioning pin.

[0065] A positioning mechanism for positioning and fixing a battery pack, wherein the positioning mechanism comprises at least one positioning sheet as described above and at least one positioning pin as described above, wherein the positioning pin is installed on the battery pack, and the positioning mechanism restricts the battery pack from deviating from the positioning sheet along the axial direction of the positioning pin;

[0066] Alternatively, the positioning mechanism comprises a positioning pin and at least one positioning sheet as described above, the positioning pin is installed in a battery pack, and the positioning pin enters the slide from the opening.

[0067] In the present solution, by using the above structure, the first position limiting part of the positioning sheet and the second position limiting part of the positioning pin are combined to restrict the movement direction of the positioning pin, thereby preventing the positioning pin from deviating from the positioning sheet along its axial direction, thereby realizing axial fixation of the battery pack using such a positioning pin. The present solution is advantageous for improving the lifespan of the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state, and reduces the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0068] In the present solution, by using the above structure, the battery pack is fixed in the vertical direction using a positioning pin by using a clamping device to fix the positioning pin in the vertical direction. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0069] In a quick change bracket assembly for mounting a battery pack, the quick change bracket assembly includes a quick change bracket, and the quick change bracket assembly further includes a positioning mechanism as described above, and the positioning sheet is installed on the quick change bracket.

[0070] In the present solution, by using the above structure, the battery pack located within the quick-change bracket assembly is fixed in the axial direction using the quick-change bracket assembly including a positioning sheet, thereby preventing the battery pack from detaching from the quick-change bracket along the axial direction of the positioning pin. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0071] In the present solution, by using the above structure, the battery pack located within the quick-change bracket assembly is fixed in the height direction by using a quick-change bracket including a positioning sheet to prevent the battery pack from detaching from the quick-change bracket along the height direction. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0072] A quick-change bracket assembly for mounting a battery pack to an electric vehicle comprises a quick-change bracket, a locking mechanism, and a positioning mechanism, wherein the locking mechanism and the positioning mechanism are both installed on the quick-change bracket, and the locking mechanism locks the battery pack to the electric vehicle to restrict the battery pack from moving along the driving direction of the electric vehicle; and the positioning mechanism restricts the battery pack from moving in a direction perpendicular to the driving direction within a horizontal plane and / or restricts the battery pack from moving along a vertical direction.

[0073] In the present solution, by using the above structure, a slide positioning mechanism and a double swing positioning mechanism are installed on the quick-change bracket assembly to fix the battery pack in the direction in which the electric vehicle travels, as well as in the axial and vertical directions of the slide pin. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the causes of failure in the battery pack.

[0074] Preferably, the positioning mechanism includes a slide positioning mechanism for restricting the battery pack from moving along a direction perpendicular to the driving direction within a horizontal plane.

[0075] Preferably, the slide positioning mechanism includes a slide sheet connected to the quick change bracket and coupled with the slide pin of the battery pack;

[0076] On the side of the slide sheet, an opening is installed to allow the slide pin to enter the slide, and a slide extending from the opening is installed;

[0077] A first position limiting part is installed within the slide of the slide sheet, and a second position limiting part is installed on the slide pin, and the second position limiting part is combined with the first position limiting part to restrict the battery pack from moving along the axial direction of the slide pin;

[0078] Preferably, the slide sheet is installed on the left or right side of the quick change bracket;

[0079] and / or, the first position limiting portion is a projection, or the first position limiting portion is a depression;

[0080] and / or, the first position limiting part is a recess, the second position limiting part is a projection, the number of the second position limiting parts is a plurality, the plurality of projections are arranged along the axial direction of the slide pin, or the plurality of projections are arranged along the radial direction of the slide pin.

[0081] In the present solution, by using the above structure, the slide positioning mechanism restricts the movement direction of the slide pin using a first position limiting member, thereby preventing the slide pin from deviating from the slide sheet along its axial direction, and thus fixing the battery pack using such a slide pin in the axial direction. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0082] In the present solution, by using the above structure, the problem of mounting the battery pack, which is complicated and requires high positioning accuracy, is prevented by installing a slide positioning mechanism on the left or right side of the quick change bracket so that the battery pack is fixed along the axial direction of the slide pin, as well as simultaneously positioning it on both sides of the axial direction of the slide pin.

[0083] In the present solution, by using the above structure, the first position limiting part is designed as a protrusion or a recess, thereby making it advantageous for the slide sheet to implement a position limiting function, while simultaneously simplifying the structural form of the first position limiting part to improve the service life of the slide sheet.

[0084] In this solution, by using the above structure, the rigidity of the slide pin when it is in a positioned state is improved by utilizing the engaging coupling of the protrusions and the recesses. At the same time, multiple protrusions are installed on the slide pin to make the slide pin more rigid and prevent it from easily detaching from the slide sheet along its axial direction. Furthermore, the problem of the positioning state changing due to a single protrusion losing its effectiveness is prevented, thereby improving the safety factor of the slide pin.

[0085] Preferably, the positioning mechanism includes a double swing positioning mechanism for limiting the movement of the battery pack along the vertical direction;

[0086] Preferably, the double swing positioning mechanism is installed symmetrically on one or two sides of the left or right side of the quick change bracket;

[0087] and / or, the double swing positioning mechanism comprises a double swing seat and a double swing pin, the double swing seat is connected to the quick change bracket, and the double swing pins are all connected to the battery pack;

[0088] On the side of the double swing seat, an opening is installed to allow the double swing pin to enter the slide, and a slide extending from the opening is installed;

[0089] The double swing seat further includes a clamping device installed within the slide that contacts the double swing pin along the vertical direction when the double swing pin is placed at a positioning point, thereby restricting the battery pack from moving along the vertical direction.

[0090] In the present solution, by using the above structure, the movement of the battery pack in the vertical direction is restricted by using a double swing positioning mechanism, thereby simplifying the structural form of the quick change bracket assembly, reducing the movement of the battery pack, and lowering the complexity of the movement state of the battery pack, which is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack.

[0091] In the present solution, by using the above structure, the movement of the battery pack in the vertical direction is restricted by installing a double swing positioning mechanism on one side of the quick change bracket, and the rigidity of the battery pack is improved by installing a double swing positioning mechanism on two sides of the quick change bracket.

[0092] In the present solution, by using the above structure, a clamping device is installed within the slide to firmly clamp the double swing pin placed at the positioning point, and furthermore, the double swing pin is prevented from moving along the vertical direction so that the double swing pin is fixed in the vertical direction. Additionally, the positioning mechanism of the double swing seat, the quick-change bracket assembly, and the battery pack of the electric vehicle are utilized to position and fix the double swing pin in the vertical direction. Thus, the present solution is advantageous for improving the lifespan of the battery pack by reducing the movement of the battery pack and lowering the complexity of the battery pack's movement state, and it reduces the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0093] Preferably, the clamping device is installed at a positioning point of the double swing pin within the slide, and the clamping device includes a swing body and a fixed axis, the fixed axis is connected to the main body of the double swing seat, and the swing body can rotate around the fixed axis; when the double swing pin is placed at the positioning point, the swing body comes into contact with the outer wall of the double swing pin;

[0094] Preferably, the clamping device comprises two clamping assemblies, each clamping assembly comprising one swing body and one fixed axis, and the two clamping assemblies are installed symmetrically on both sides of the slide;

[0095] Preferably, when the double swing pin is placed at a positioning point, the centerline of the double swing pin forms a co-plane with the centerlines of the two fixed axes;

[0096] and / or, the clamping device further comprises an elastic member installed between the double swing seat body and the swing body, which acts on the swing body such that when the swing body is not subjected to force, the contact surface of the swing body faces the direction in which the double swing pin slides in, and one end of which is inserted into the swing body and the other end of which is in contact with the double swing seat body.

[0097] In this solution, by using the above structure, the clamping device is installed at the positioning point, thereby making the positioning pin more rigid at the positioning point and reducing the probability of the positioning pin moving unexpectedly at the positioning point. By using a swing body and a fixed axis, the structure of the clamping device is simplified, and the swing body can surround and rotate around the fixed axis, allowing the swing body to more easily transition to the positioning state, as well as improving the rigidity of the double swing pin at the positioning point.

[0098] In the present solution, by using the above structure, when a double swing pin is placed at a positioning point using symmetrically installed clamping assemblies, the two groups of clamping assemblies simultaneously clamp the double swing pin, thereby improving the rigidity of the double swing pin.

[0099] In this solution, by using the above structure, the centerline of the double swing pin and the centerlines of the two fixed axes are designed to be coplanar, so that when the double swing pin is positioned at the positioning point, the distance between the double swing pin and the two fixed axes is smallest, and the two swing bodies clamp the double swing pin more firmly. Since the axial force received by the double swing pin is greatest at this time, it is difficult for the double swing pin to move away from the positioning point, thereby improving the rigidity of the double swing pin.

[0100] In the present solution, by using the above structure, the double swing pin is oriented in the direction in which it slides into the swing body by using an elastic member, thereby allowing the double swing pin to slide smoothly into the swing body, and furthermore, it becomes advantageous for the clamping device to clamp the double swing pin. By inserting the elastic member into the main body of the swing body and the double swing seat to improve the rigidity of the elastic member, it becomes advantageous to apply elasticity to the swing body when replacing the elastic member.

[0101] In an electric vehicle, it includes a battery pack and at least one quick-change bracket assembly as described above.

[0102] In the present solution, by using the above structure, the battery pack of such an electric vehicle is secured in the axial direction of the positioning pin using a quick-change bracket assembly. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0103] In the present solution, by using the above structure, the battery pack of such an electric vehicle is secured in the height direction using a quick-change bracket assembly. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0104] In the present solution, by using the above structure, the battery pack of such an electric vehicle is secured in the vertical direction and the axial direction of the slide pin using a quick-change bracket assembly. The present solution is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0105] Based on the ordinary knowledge in the art, each of the above preferred conditions is arbitrarily combined to obtain each relatively preferred embodiment of the present invention.

[0106] The present invention implements axial fixation of a battery pack using such a positioning pin by installing a first position limiting member on a positioning sheet and using the first position limiting member to limit the movement direction of a positioning pin, thereby preventing the positioning pin from deviating from the positioning sheet along its axial direction. The present invention is advantageous for improving the lifespan of a battery pack and reducing the probability of damage to the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack. Brief explanation of the drawing

[0107] FIG. 1 is a schematic diagram of the structure of a positioning sheet according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram of another structure of a positioning sheet according to Embodiment 1 of the present invention. FIG. 3 is a schematic diagram of the structure of the AA cross-section of a positioning sheet according to Embodiment 1 of the present invention. FIG. 4 is a schematic diagram of the structure of a positioning sheet including an elastic sheet according to Example 1 of the present invention. FIG. 5 is a schematic diagram of the structure of a positioning pin according to Embodiment 2 of the present invention. FIG. 6 is a schematic diagram of the cross-sectional structure of a positioning pin according to Embodiment 2 of the present invention. FIG. 7 is a schematic diagram of the structure of a positioning mechanism according to Embodiment 3 of the present invention. FIG. 8 is a schematic diagram of the cross-sectional structure of a positioning mechanism according to Embodiment 3 of the present invention. FIG. 9 is a schematic diagram of the structure of a quick-change bracket assembly according to Embodiment 4 of the present invention. FIG. 10 is a schematic diagram of the structure of a battery pack assembly of an electric vehicle according to Embodiment 5 of the present invention. FIG. 11 is a schematic diagram of the structure of a positioning sheet according to Example 6 of the present invention. FIG. 12 is a schematic diagram of another structure of a positioning sheet according to Example 6 of the present invention. FIG. 13 is a schematic diagram of the structure of a positioning mechanism according to Example 7 of the present invention. FIG. 14 is a schematic diagram of the cross-sectional structure of a positioning mechanism according to Example 7 of the present invention. FIG. 15 is a schematic diagram of the structure of another cross-section of a positioning mechanism according to Embodiment 7 of the present invention. FIG. 16 is a schematic diagram of the structure of a positioning pin of a positioning mechanism according to Embodiment 7 of the present invention. FIG. 17 is a schematic diagram of the structure of a quick change bracket assembly according to Embodiment 8 of the present invention. FIG. 18 is a schematic diagram of the structure of a battery pack assembly of an electric vehicle according to Embodiment 9 of the present invention. FIG. 19 is a schematic diagram of the structure of a quick change bracket assembly according to Example 10 of the present invention. FIG. 20 is a schematic diagram of the structure of a slide positioning mechanism in a quick change bracket assembly according to Embodiment 10 of the present invention. FIG. 21 is a schematic diagram of the structure of a double swing positioning mechanism in a quick change bracket assembly according to Embodiment 10 of the present invention. FIG. 22 is a schematic diagram of the structure of a battery pack assembly of an electric vehicle according to Example 11 of the present invention. Specific details for implementing the invention

[0108] The present invention is further explained below by means of embodiments, but the present invention is not limited to the scope of the embodiments described above.

[0109] Example 1

[0110] As illustrated in FIGS. 1 to 4, the present embodiment is a positioning sheet (1) for positioning a battery pack, wherein the positioning sheet (1) is for receiving and fixing a positioning pin of the battery pack, and on the side of the positioning sheet (1), an opening (12) for allowing the positioning pin to enter a slide (11) and a slide (11) extending from the opening (12) are installed; and within the slide (11), a first position limiting part is installed to restrict the positioning pin from moving out of the positioning sheet (1) along the axial direction.

[0111] This embodiment restricts the movement direction of the positioning pin using a first position limiting member, thereby preventing the positioning pin (2) from deviating from the positioning sheet (1) along its axial direction, and implements fixation of the battery pack in the axial direction using such a positioning pin. This embodiment is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by reducing the movement direction of the battery pack and lowering the complexity of the battery pack's movement state. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0112] As illustrated in FIG. 2, the slide (11) in this embodiment is provided with a support platform (111) for supporting a positioning pin, on which a first position limiting part is installed. This embodiment makes the positioning pin more robust by implementing support for the positioning pin using the support platform (111). Of course, in other embodiments, the support platform (111) may be designed in other forms.

[0113] In this embodiment, the first position limiting portion may be designed as a recess (13) having a first position limiting surface (131) and a second position limiting surface (132), where the intersection point of the first position limiting surface (131) and the second position limiting surface (132) is the lowest point of the recess. This embodiment is advantageous for improving the position limiting function of the recess (13) by simplifying the structural form of the recess (13) by designing the recess (13) as a first position limiting surface (131) and a second position limiting surface (132). In this embodiment, the first position limiting surface (131) and the second position limiting surface (132) are approximated as a plane, and the junction point of the two utilizes an arc transition. This is advantageous for improving the usage cycle of the first position limiting portion by preventing the appearance of sharp edges. In other embodiments, the first position limiting surface (131) and the second position limiting surface (132) may also be designed in other forms, such as curved surfaces. Of course, the first position limiting part may be installed as a protrusion similar to the recess (13).

[0114] In another embodiment, the cross-section of the first position limiting part may be one of an arc shape, a V shape, or a formulation shape. In this embodiment, by designing the cross-section of the first position limiting part as one of an arc shape, a V shape, or a formulation shape, the positioning sheet (1) is advantageous for implementing a position limiting function, while also simplifying the structural form of the first position limiting part to improve the usage cycle of the positioning sheet (1).

[0115] As illustrated in FIG. 4, the positioning sheet (1) further includes a cushioning member, and at least a portion of the cushioning member is located within the slide (11). When the positioning sheet (1) is placed in a positioning state, the cushioning member comes into contact with the wall of the positioning pin. This embodiment is advantageous for reducing the impact of the positioning pin on the positioning sheet (1) by absorbing the kinetic energy when the positioning pin is switched to a positioning state using the cushioning member, reducing noise when the positioning pin is positioned, and improving the rigidity of the positioning pin when it is placed in a positioning state. Specifically, in this embodiment, the cushioning member is an elastic sheet (14). In this embodiment, by using the above structure, the cost of the cushioning member is reduced and the cushioning effect of the cushioning member is improved by using the elastic sheet (14) as the cushioning member. The material of the elastic sheet (14) can be selected as silica gel, but of course, other materials can also be selected for the elastic sheet (14). The cushioning member can also be selected in other forms.

[0116] Example 2

[0117] As illustrated in FIGS. 5 and 6, the present embodiment is a positioning pin (2) connected to a battery pack and combined with a positioning sheet (1) as described above. The positioning pin (2) is provided with a second position limiting part in combination with a first position limiting part to limit the movement of the battery pack along the axial direction of the positioning pin (2). By using the second position limiting part in combination with the first position limiting part, the present embodiment improves the rigidity of the positioning pin (2) when it is placed in a positioning state, thereby fixing the positioning pin (2) in its axial direction, and thus fixing the battery pack using such a positioning pin (2) in its axial direction. The present embodiment is advantageous for improving the lifespan of the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the movement state of the battery pack, and reduces the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0118] In this embodiment, the positioning pin (2) includes a pin sheet (21), a pin shaft (22), a shaft sleeve (23), and an axle bumper (24). The second position limiting part is the shaft sleeve (23). The shaft sleeve (23) and the slide (11) may be designed to be transiently coupled. By using the shaft sleeve (23) transiently coupled with the slide (11), the positioning pin (2) is made more rigid with respect to the positioning sheet (1), thereby reducing the unintended movement of the positioning pin (2).

[0119] In FIG. 6, the shaft sleeve (23) is installed over the pin shaft (22). By installing the shaft sleeve (23) over the outside of the positioning pin (2), the shaft sleeve (23) is made to more sufficiently combine with the first position limiting part of the positioning sheet (1), which is advantageous for improving the rigidity when the positioning pin (2) is placed in a positioning state.

[0120] In this embodiment, the shaft sleeve (23) can rotate with respect to the pin shaft (22). Designing the shaft sleeve (23) to be rotatable reduces the resistance when the positioning pin (2) enters the slide (11), which is advantageous for improving the service life of the positioning pin (2). Furthermore, by designing the shaft sleeve (23) and the pin shaft (22) to be detachably connected, the shaft sleeve (23) and the pin shaft (22) are each designed and manufactured independently, and their performance is better suited to their respective usage environments, which is advantageous for improving the quality of the positioning pin (2).

[0121] In FIG. 6, the positioning pin (2) further includes an axle bumper (24) installed on the cross-section of the positioning pin (2) to prevent the second position limiting member from moving along the axial direction of the positioning pin (2). By using the axle bumper (24) to prevent the second position limiting member from moving along the axial direction, the safety factor of the positioning pin (2) is improved.

[0122] In other embodiments, the second position limiting part and the positioning pin (2) may be designed as an overall structure. By designing the second position limiting part and the positioning pin (2) as an overall structure, the manufacturing process of the positioning pin (2) is simplified and the cost of the positioning pin (2) is reduced.

[0123] In this embodiment, the second position limiting part is designed as a shaft sleeve (23) that protrudes outward, and in other embodiments, the second position limiting part may be designed as a recessed part inward and in other shapes such as a wave shape.

[0124] In order to further improve the safety factor of the positioning pin (2), the second position limiting part may be designed as a protrusion of a different shape. The number of second position limiting parts may be multiple, and the multiple protrusions may be arranged along the axial direction of the positioning pin (2) or the multiple protrusions may be arranged along the radial direction of the positioning pin (2). In this embodiment, the protrusions and the recessed part (13) of the positioning sheet (1) are engaged to improve the rigidity when the positioning pin (2) is placed in a positioning state. At the same time, multiple protrusions are installed on the positioning pin (2) to make the positioning pin (2) more rigid so that it cannot be displaced along its axial direction from the positioning sheet (1). In addition, the problem of the positioning state changing due to one protrusion losing its effectiveness is prevented, thereby improving the safety factor of the positioning pin (2).

[0125] Example 3

[0126] As illustrated in FIGS. 7 and 8, the present embodiment is a positioning mechanism (3) for positioning a battery pack, wherein the positioning mechanism (3) includes a positioning sheet (1) in Example 1 and a positioning pin (2) in Example 2, the positioning pin (2) is installed on the battery pack, and the positioning mechanism (3) restricts the battery pack from moving away from the positioning sheet (1) along the axial direction of the positioning pin (2). In the present embodiment, a first position limiting part of the positioning sheet (1) and a second position limiting part of the positioning pin (2) are combined to restrict the direction of movement of the positioning pin (2) and prevent the positioning pin (2) from moving away from the positioning sheet (1) along its axial direction, thereby fixing the battery pack using such a positioning pin (2) in the axial direction. This embodiment is advantageous for improving the lifespan of a battery pack and reducing the probability of damage by reducing the direction of motion of the battery pack and lowering the complexity of the battery pack's motion state. At the same time, it is also advantageous for analyzing the causes of failure in the battery pack.

[0127] Example 4

[0128] As illustrated in FIG. 9, the present embodiment is a quick change bracket assembly (4) for mounting a battery pack, wherein the quick change bracket assembly (4) includes a quick change bracket (41), and the quick change bracket assembly (4) further includes a positioning sheet (1) of a positioning mechanism (3), and the positioning sheet (1) is installed on the quick change bracket (41). The positioning sheet (1) is installed on one side of the quick change bracket (41). The present embodiment uses the quick change bracket assembly (4) including the positioning sheet (1) to prevent the battery pack located within the quick change bracket assembly (4) from moving away from the quick change bracket (41) along the axial direction of the positioning pin (2), thereby fixing the battery pack using this quick change bracket assembly (4) in the axial direction. This embodiment is advantageous for improving the lifespan of a battery pack and reducing the probability of damage by reducing the direction of motion of the battery pack and lowering the complexity of the battery pack's motion state. At the same time, it is also advantageous for analyzing the causes of failure in the battery pack.

[0129] Example 5

[0130] The present embodiment is an electric vehicle, and FIG. 10 illustrates a battery pack assembly (5) of the electric vehicle. The electric vehicle of the present embodiment includes a battery pack assembly (5) and a quick change bracket assembly (4) from embodiment 4.

[0131] In this embodiment, by using the above structure, the battery pack (51) of the electric vehicle is fixed in the axial direction of the positioning pin (2) using the quick change bracket assembly (4). This embodiment is advantageous for improving the lifespan of the battery pack (51) by reducing the direction of movement of the battery pack (51) and lowering the complexity of the movement state of the battery pack (51), and reduces the probability of damage to the battery pack (51). At the same time, it is also advantageous for analyzing the cause of failure in the battery pack (51).

[0132] Example 6

[0133] As illustrated in FIGS. 11 and 12, the present embodiment is a positioning sheet (10) for positioning a battery pack, wherein the positioning sheet (10) comprises a positioning sheet body (101), and on the side of the positioning sheet body (101) an opening (12) for allowing a positioning pin of the battery pack to enter a slide (11) and a slide (11) extending from the opening (12) are installed, and the positioning sheet (10) further comprises a clamping device (13) installed within the slide (11), and when the positioning pin is placed at a positioning point, the clamping device (13) comes into contact with the positioning pin along the vertical direction. In this embodiment, by installing a clamping device (13) within the slide (11), the positioning pin placed at the positioning point is firmly clamped, and furthermore, the positioning pin is fixed in the vertical direction by preventing it from moving along the vertical direction. In addition, the positioning pin is positioned and fixed in the vertical direction using the positioning mechanism of the positioning sheet (10), the quick change bracket assembly, and the battery pack of the electric vehicle. This embodiment is advantageous for improving the lifespan of the battery pack by reducing the movement of the battery pack and lowering the complexity of the battery pack's movement state, and reduces the probability of the battery pack being damaged. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0134] In one embodiment, a clamping device (13) is installed at the positioning point of a positioning pin within the slide (11). In this embodiment, by installing the clamping device at the positioning point, the positioning pin is made more secure at the positioning point, thereby reducing the probability that the positioning pin will move unexpectedly at the positioning point.

[0135] Specifically, the clamping device (13) includes a swing body (131) and a fixed shaft (132), the fixed shaft (132) is connected to a positioning sheet body (101), and the swing body (131) can rotate around the fixed shaft (132); when a positioning pin is placed at a positioning point, the swing body (131) comes into contact with the outer wall of the positioning pin. This embodiment simplifies the structure of the clamping device (13) by using the swing body (131) and the fixed shaft (132), and the swing body (131) rotates around the fixed shaft (132) so that the swing body (131) can more easily switch to a positioning state, thereby improving the rigidity of the positioning pin at the positioning point. In other embodiments, the clamping device (13) may be designed in other forms.

[0136] In one embodiment, the swing body (131) further comprises an arc surface that contacts the outer wall of the positioning pin. This embodiment improves the rigidity of the positioning pin at the positioning point by utilizing the fact that the arc surface of the swing body (131) contacts the positioning pin. In other embodiments, the swing body (131) may be designed in other shapes.

[0137] In order to facilitate the positioning pin sliding into the swing body (131), the swing body (131) may be swung at the entrance of the slide (11) when the positioning pin enters the slide (11). This embodiment allows the positioning pin to enter the swing body (131) more easily by swinging the swing body (131) at the entrance, while also improving the rigidity of the positioning pin within the swing body (131).

[0138] In one embodiment, the clamping device (13) further includes an elastic member installed between the positioning sheet body (101) and the swing body (131) and acting on the swing body (131) such that when the swing body (131) is not subjected to force, the contact surface of the swing body (131) is directed toward the direction in which the positioning pin slides in. In this embodiment, by using the elastic member to direct the swing toward the direction in which the positioning pin slides in, the positioning pin slides smoothly into the swing body (131), thereby making it advantageous for the clamping device (13) to clamp the positioning pin.

[0139] In order to improve the rigidity of the elastic member, one end of the elastic member may be inserted into the swing body (131) and the other end of the elastic member may be brought into contact with the positioning sheet body (101). In this embodiment, by inserting the elastic member into the swing body (131) and the positioning sheet body (101) to improve the rigidity of the elastic member, it is advantageous to apply elasticity to the swing body (131) when replacing the elastic member.

[0140] In this embodiment, the elastic member is designed as a spring (15). This embodiment improves the lifespan of the elastic member and reduces the cost of the positioning sheet (10) by simplifying the design form of the elastic member using the spring (15). In other embodiments, the elastic member may be designed in other forms, and of course, other mounting positions may be selected.

[0141] In one embodiment, the clamping device (13) includes two clamping assemblies (130), each clamping assembly (130) includes one swing body (131) and a fixed shaft (132), and the two clamping assemblies (130) are installed symmetrically on both sides of the slide (11). This embodiment improves the rigidity of the positioning sheet (10) by using the symmetrically installed clamping assemblies (130) so that when a positioning pin is placed at a positioning point, the two groups of clamping assemblies (130) simultaneously clamp the positioning pin. In other embodiments, only one group of clamping assemblies (130) may be installed, and the corresponding technical problem can likewise be solved.

[0142] In this embodiment, as shown in FIGS. 14 and 15, when the positioning pin is placed at the positioning point, the centerline of the positioning pin forms a co-plane with the centerlines of the two fixed axes (132). In this embodiment, by designing the centerline of the positioning pin and the centerlines of the two fixed axes (132) to form a co-plane, the distance between the positioning pin and the two fixed axes (132) is minimized when the positioning pin is placed at the positioning point, thereby allowing the two swing bodies (131) to clamp the positioning pin more firmly, and the force received by the positioning pin in the axial direction is at its greatest at this time, so that the positioning pin cannot move away from the positioning point, thereby improving the rigidity of the positioning sheet (10). When a positioning pin is placed at a positioning point, the positioning pin and two swing bodies (131) may be designed to be transitionally combined. In this embodiment, the two swing bodies (131) may clamp the positioning pin more firmly, thereby increasing the axial force received by the positioning pin, making it more difficult for the positioning pin to move away from the positioning point and thus allowing it to be fixed more firmly at the positioning point.

[0143] In one embodiment, the positioning sheet (10) further includes a relief member, at least a portion of which is located within the slide (11), and when the positioning pin is placed at the positioning point, the relief member comes into contact with the wall of the positioning pin. This embodiment is advantageous for reducing the impact of the positioning pin on the positioning sheet (10) by partially absorbing the kinetic energy when the positioning pin is switched to the positioning state using the relief member, thereby reducing noise when the positioning pin is positioned and improving the rigidity when the positioning pin is placed in the positioning state.

[0144] Specifically, in this embodiment, the relief member is an elastic sheet (14). In this embodiment, the elastic sheet (14) is used as the relief member to reduce the cost of the relief member and improve the relief effect of the relief member. In other embodiments, the relief member may be designed in other forms.

[0145] In this embodiment, as shown in FIGS. 11 and 12, receiving cavities for a clamping assembly (130) are installed on both sides of the slide (11), and a set of clamping assemblies (130) are installed in each of the receiving cavities on both sides. The receiving cavities provide a receiving space for the clamping assembly (130). At the same time, mounting holes for a fixed shaft (132) are installed in the positioning seat body (101) so that the swing body (131) can surround the fixed shaft (132) and swing within the receiving cavities. When the swing body (131) rotates to the left or right and reaches an extreme point, the outer wall of the swing body (131) comes into contact with the positioning sheet body (101) to restrict the swing body (131) from continuing to rotate. At this time, the arc surface of the swing body (131) is positioned parallel to the edge of the slide (11) so that the positioning pin reaching the connection point can stably enter and exit the arc surface of the swing body (131). In a normal situation, when the positioning pin does not enter the arc surface of the swing body (131), the swing body (131) is oriented in the direction in which the positioning pin slides in under the action of the spring (15). At this time, the arc surface of the swing body (131) and the edge of the slide (11) are positioned parallel to each other.

[0146] The positioning pin enters the slide (11) from the opening (12) and continues to penetrate deeply along the slide (11). When the positioning pin reaches the connection point between the slide (11) and the arc surface of the swing body (131), the slide (11) and the arc surface come into contact side by side, so the positioning pin can stably enter the arc surface of the swing body (131).

[0147] As the positioning pin continues to penetrate deeper along the arc surface and gradually reaches the middle of the arc surface from the edge of the arc surface, the distance between the axis of the positioning pin and the axis of the fixed axis (132) on both the upper and lower sides gradually decreases, and the pressure generated by the positioning pin against the arc surface gradually increases, and this pressure causes the swing body (131) to rotate around the fixed axis (132).

[0148] When the positioning pin reaches the middle position of the arc surface, that is, when the axis of the positioning pin forms a plane with the axis of the upper and lower fixed axes (132), and at the same time the distance between the axis of the positioning pin and the axis of the upper and lower fixed axes (132) is the smallest, the positioning pin and the arc surface of the swing body (131) are in a transitional mixing state, and the pressure generated by the positioning pin against the arc surface of the swing body (131) is also the greatest. This position is the positioning point of the positioning pin. Since the fixing pressure received by the positioning pin at this positioning point is also the greatest, the upper and lower clamping assemblies (130) can clamp and fix the positioning pin, thereby preventing the positioning pin from moving in the vertical direction. In addition, since no relative movement occurs between the fixed axis (132) and the arc surface of the swing body (131), no frictional force is generated between the positioning pin and the swing body (131) at this positioning point. Therefore, when placed at the positioning point, the clamping assembly (130) does not generate heat due to friction, which is advantageous for improving the rigidity and lifespan of the present invention. At this time, the elastic sheet (14) is also in contact with the positioning pin.

[0149] When the positioning pin continues to slide and moves away from the middle position of the arc surface, the distance between the axis of the positioning pin and the axis of the fixed axis (132) on both the upper and lower sides gradually increases, and the pressure generated by the positioning pin against the arc surface gradually decreases, and at the same time, this pressure also causes the swing body (131) to surround the fixed axis (132) and rotate.

[0150] After the positioning pin exits the arc surface, the swing body (131) is oriented in the direction in which the positioning pin slides under the action of the spring (15). At this time, the arc surface of the swing body (131) and the edge of the slide (11) are aligned.

[0151] Example 7

[0152] As illustrated in FIGS. 13 to 16, the present embodiment is a positioning mechanism (30) comprising a positioning pin (20) and a positioning sheet (10) in Example 6, wherein the positioning pin (20) is installed in a battery pack and the positioning pin (20) enters a slide (11) from an opening (12). The present embodiment allows the battery pack using the positioning pin (20) to be fixed in a vertical direction by using a clamping device (13) to fix the positioning pin (20) in a vertical direction. The present embodiment is advantageous for improving the lifespan of the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the movement state of the battery pack, and reduces the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0153] In one embodiment, the positioning pin (20) may be designed as an overall structure, which is formed through processing, and the positioning pin (20) of this embodiment has a simple structure and good strength and rigidity. In addition, wear resistance may be increased by performing heat treatment at the position of the positioning pin (20) that combines with the clamping device (13), and this embodiment can improve the service life of the positioning pin (20) while simultaneously reducing the cost of the positioning mechanism (30).

[0154] In this embodiment, the positioning pin (20) enters the positioning sheet body (101) through the opening (12) of the slide (11). When the positioning pin (20) has not entered the clamping assembly (130), the swing body (131) swings in the direction in which the positioning pin (20) slides in under the action of the spring (15). When the positioning pin (20) gradually slides in from the slide (11) into the arc surface of the swing body (131), the swing body (131) begins to roll around the fixed axis (132) under the combined action of the pressure of the positioning pin (20) and the elasticity of the spring (15); When the positioning pin (20) reaches the positioning point, that is, when the positioning pin (20) reaches the middle of the arc surface of the swing body (131), the axis of the two upper and lower fixed axes (132) and the axis of the positioning pin (20) form a common plane. At this time, since the distance between the positioning pin (20) and the two fixed axes (132) is the smallest, the pressure generated by the two swing bodies (131) on the positioning pin (20) is the greatest, that is, since the pressure received by the positioning pin (20) from the two upper and lower clamping assemblies (130) is the greatest, the positioning pin (20) is fixed in the vertical direction. In one embodiment, the positioning pin (20) and two swing bodies (131) are designed in a transitional combination so that the two swing bodies (131) can clamp the positioning pin (20) more firmly, that is, the force received by the positioning pin (20) in the axial direction is increased, making it more difficult for the positioning pin (20) to move away from the positioning point and fixing it more firmly to the positioning point.

[0155] In this embodiment, an elastic sheet (14) is further installed at the end of the slide (11), with a portion of the elastic sheet (14) installed within the slide (11) and another portion inserted into the positioning sheet body (101). The elastic sheet (14) is advantageous for reducing the impact of the positioning pin (20) on the positioning sheet (10) and for reducing noise when positioning the positioning pin (20), and is advantageous for improving the rigidity of the positioning pin (20) when it is in a positioned state.

[0156] Example 8

[0157] As illustrated in FIG. 17, the present embodiment is a quick change bracket assembly (40) for mounting a battery pack, wherein the quick change bracket assembly (40) includes a quick change bracket (41), the quick change bracket assembly (40) further includes a positioning mechanism (30) from embodiment 7, and the quick change bracket (41) is connected to a positioning sheet (10). The present embodiment uses a quick change bracket (41) including a positioning sheet (10) to prevent a battery pack located within the quick change bracket assembly (40) from moving away from the quick change bracket (41) along the height direction, thereby ensuring that the battery pack using this quick change bracket assembly (40) is fixed in the height direction. The present embodiment is advantageous for improving the lifespan of the battery pack by reducing the direction of movement of the battery pack and lowering the complexity of the movement state of the battery pack, and reduces the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the causes of battery pack failures.

[0158] Example 9

[0159] As illustrated in FIG. 18, the present embodiment is an electric vehicle, and what is illustrated in the drawing is a battery pack assembly (50) of the electric vehicle. The electric vehicle includes a battery pack assembly (50) and a quick change bracket assembly (40) such as in Example 8. The quick change bracket assembly (40) includes a positioning sheet (10) from Example 6, and the battery pack (51) includes a positioning pin (20) and a battery pack (51), and the positioning pin is installed on the side of the battery pack (51). The positioning pin (20) and the positioning sheet (10) are combined to fix the battery pack (51) of the electric vehicle in the height direction. The present embodiment is advantageous for improving the lifespan of the battery pack (51) by reducing the direction of movement of the battery pack (51) and lowering the complexity of the movement state of the battery pack (51), and reduces the probability of damage to the battery pack (51). At the same time, it is also advantageous for analyzing the cause of failure in the battery pack (51).

[0160] Example 10

[0161] As illustrated in FIGS. 19 to 22, the present embodiment is a quick change bracket assembly (10) for mounting a battery pack to an electric vehicle, wherein the quick change bracket assembly (10) comprises a quick change bracket (11), a locking mechanism (20), and a positioning mechanism, wherein both the locking mechanism (20) and the positioning mechanism are installed on the quick change bracket (11), and the locking mechanism (20) locks the battery pack to the electric vehicle while simultaneously restricting the battery pack from moving along the driving direction of the electric vehicle; and the positioning mechanism restricts the battery pack from moving along a direction perpendicular to the driving direction within a horizontal plane and / or restricts the battery pack from moving along a vertical direction. In this embodiment, by installing a slide positioning mechanism (30) and a double swing positioning mechanism (40) on a quick change bracket assembly (10), the battery pack is fixed in the axial and vertical directions of the slide pin (32). This embodiment is advantageous for improving the lifespan of the battery pack by reducing the movement of the battery pack and lowering the complexity of the battery pack's movement state, and it is also advantageous for reducing the probability of damage to the battery pack. At the same time, it is also advantageous for analyzing the cause of failure in the battery pack.

[0162] In one embodiment, the positioning mechanism may further include a slide positioning mechanism (30) for restricting the battery pack from moving along a direction perpendicular to the driving direction within a horizontal plane.

[0163] Specifically, the slide positioning mechanism (30) is the same as the positioning mechanism (3) in Examples 1 to 5, the slide sheet (31) is the same as the positioning sheet (1) in Examples 1 to 5, and the slide pin (32) is the same as the positioning pin (2) in Examples 1 to 5. The first position limiting part is the same as the first position limiting surface (131) in Examples 1 to 5, and the second position limiting part is the same as the second position limiting surface (132) in Examples 1 to 5.

[0164] A first position limiting part is installed within the slide (11) of the slide sheet (31), and a second position limiting part (321) is installed on the slide pin (32), and the second position limiting part is combined with the first position limiting part to restrict the battery pack from moving along the axial direction of the slide pin (32).

[0165] In this embodiment, by installing a slide positioning mechanism (30) on the left or right side of the quick change bracket (11), the battery pack is fixed along the axial direction of the slide pin (32), and the battery pack is restricted from moving along a direction perpendicular to the driving direction within the horizontal plane. By simultaneously positioning the battery pack on both sides of the axial direction of the slide pin (32), the problem of being complex to mount and having high requirements for positioning accuracy is prevented.

[0166] In order to simplify the structural form of the first position limiting part, the first position limiting part may be designed as a protrusion or a recess. In this embodiment, by designing the first position limiting part as a protrusion or a recess, the slide sheet (31) is made advantageous for implementing a position limiting function, while simultaneously simplifying the structural form of the first position limiting part to improve the service life of the slide sheet (31).

[0167] In one embodiment, the second position limiting member is installed over the slide pin (32), and the second position limiting member is rotatable with respect to the slide pin (32). In this embodiment, the second position limiting member is installed over the outside of the slide pin (32) so that the second position limiting member is more sufficiently combined with the first position limiting member, thereby improving the rigidity with which the slide pin (32) is placed in a positioning state. At the same time, by designing the second position limiting member to be rotatable, the resistance when the slide pin (32) enters the slide is reduced, which is advantageous for improving the service life of the slide pin (32).

[0168] In one embodiment, the positioning mechanism may further include a double swing positioning mechanism (40) for restricting the movement of the battery pack along the vertical direction. This embodiment is advantageous for improving the lifespan of the battery pack and reducing the probability of damage to the battery pack by using the double swing positioning mechanism (40) to restrict the movement of the battery pack in the vertical direction, thereby simplifying the structural form of the quick change bracket assembly (10), reducing the movement of the battery pack, and lowering the complexity of the movement state of the battery pack.

[0169] Specifically, the double swing positioning mechanism (40) is the same as the positioning mechanism (30) in Examples 6 to 9, the double swing sheet (41) is the same as the positioning sheet (10) in Examples 6 to 9, and the double swing pin (42) is the same as the positioning pin (20) in Examples 6 to 9.

[0170] In one embodiment, the double swing positioning mechanism (40) is symmetrically installed on one or two sides of the left or right side of the quick change bracket (11). In this embodiment, the double swing positioning mechanism (40) is installed on one side of the quick change bracket (11) to restrict the movement of the battery pack in the vertical direction, and the double swing positioning mechanism (40) is installed on two sides of the quick change bracket (11) to improve the rigidity of the battery pack.

[0171] Example 11

[0172] The present embodiment is an electric vehicle comprising a battery pack assembly (60) and a quick-change bracket assembly (10) such as that of embodiment 10. FIG. 22 is a battery pack assembly (60) in the present embodiment. The present embodiment uses the quick-change bracket assembly (10) to fix the battery pack (61) of the electric vehicle along the driving direction of the electric vehicle, the vertical direction, and the axial direction of the slide pin (32). The present embodiment is advantageous for reducing the movement direction of the battery pack (61) and reducing the complexity of the movement state of the battery pack (61), thereby improving the lifespan of the battery pack (61) and reducing the probability of damage to the battery pack (61). At the same time, it is also advantageous for analyzing the cause of failure in the battery pack (61).

[0173] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that such descriptions are merely illustrative and that various changes or modifications can be made to these embodiments without departing from the principles and substance of the present invention. Accordingly, the scope of protection of the present invention is limited by the appended claims. Explanation of the symbols

[0174] Examples 1-5: 1: Positioning sheet; 11: Slide; 111: Support platform; 12: Opening; 13: Recess; 131: First position limiting surface; 132: Second position limiting surface; 14: Elastic sheet; 2: Positioning pin; 21: Pin sheet; 22: Pin shaft; 23: Shaft sleeve; 24: Axle bumper; 3: Positioning mechanism; 4: Quick change bracket assembly; 41: Quick change bracket; 5: Battery pack assembly; 51: Battery pack. Examples 6-9: 10: Positioning sheet; 101: Positioning sheet body; 11: Slide; 12: Opening; 13: Clamping device; 130: Clamping assembly; 131: Swing body; 132: Fixed axis; 14: Elastic sheet; 15: Spring; 20: Positioning pin; 30: Positioning mechanism; 40: Quick change bracket assembly; 41: Quick change bracket; 50: Battery pack assembly; 51: Battery pack. Examples 10-11: 10: Quick-change bracket assembly; 11: Quick-change bracket; 20: Locking mechanism; 30: Slide positioning mechanism; 31: Slide seat; 11: Slide; 32: Slide pin; 23: Shaft sleeve; 40: Double swing positioning mechanism; 41: Double swing seat; 42: Double swing pin; 60: Battery pack assembly; 61: Battery pack

Claims

Claim 1 A positioning sheet for positioning a battery pack, wherein the positioning sheet receives and fixes a positioning pin of the battery pack, and on its side, an opening and a slide extending from the opening are installed, the opening is for allowing the positioning pin to enter the slide, and within the slide, a first position limiting part is installed to restrict the positioning pin from leaving the positioning sheet along the axial direction; and the slide is characterized by having a support platform that supports the positioning pin and has the first position limiting part installed thereon. Claim 2 A positioning sheet according to claim 1, characterized in that the cross-section of the first position limiting portion is one of an arc shape, a V shape, or a formulation shape. Claim 3 A positioning sheet according to claim 1, wherein the first position limiting portion is a protrusion or the first position limiting portion is a depression; and the protrusion has a first position limiting surface and a second position limiting surface, and the intersection point of the first position limiting surface and the second position limiting surface is the highest point of the protrusion. Claim 4 A positioning sheet according to claim 1, wherein the positioning sheet further comprises a relief portion, at least a portion of the relief portion is located within the slide, and when the positioning sheet is placed in a positioning state, the relief portion is in contact with the wall surface of the positioning pin. Claim 5 A positioning sheet according to claim 4, wherein the first position limiting part is a protrusion, and the protrusion has a first position limiting surface and a second position limiting surface; the first position limiting surface and the second position limiting surface are flat or curved surfaces; and the relaxation part is an elastic sheet. Claim 6 A positioning sheet for fixing the positioning of a battery pack, comprising a positioning sheet body, wherein an opening and a slide extending from the opening are installed on the side of the positioning sheet body, the opening is for allowing a positioning pin of the battery pack to enter the slide, and further comprising a clamping device, wherein the clamping device is installed within the slide and, when the positioning pin is placed at a positioning point, the clamping device comes into contact with the positioning pin along a vertical direction. Claim 7 A positioning sheet according to claim 6, wherein the clamping device is installed at the positioning point of the positioning pin within the slide; the clamping device comprises a swing body and a fixed axis, the fixed axis is connected to the positioning sheet body, and the swing body can rotate around the fixed axis; and when the positioning pin is positioned at the positioning point, the swing body comes into contact with the outer wall of the positioning pin. Claim 8 A positioning sheet according to claim 7, wherein the clamping device comprises two clamping assemblies, each clamping assembly comprises one swing body and one fixed axis, and the two clamping assemblies are installed symmetrically on both sides of the slide. Claim 9 A positioning sheet according to claim 8, wherein the clamping device further comprises an elastic member installed between the positioning sheet body and the swing body, which acts on the swing body and, when the swing body is not subjected to force, causes the contact surface of the swing body to face the direction in which the positioning pin slides in. Claim 10 A positioning sheet according to claim 6, wherein the positioning sheet further comprises a relief portion, at least a portion of the relief portion is located within the slide, and when the positioning pin is placed at a positioning point, the relief portion comes into contact with the wall surface of the positioning pin. Claim 11 In claim 9, the swing body has an arc surface that contacts the outer wall of the positioning pin; when the positioning pin has not entered the slide, the swing body swings toward the entrance of the slide; when the positioning pin is positioned at the positioning point, the centerline of the positioning pin forms a co-plane with the centerlines of the two fixed axes; one end of the elastic member is inserted into the swing body, and the other end of the elastic member contacts the main body of the positioning sheet; the positioning sheet further comprises a relief member, at least a portion of the relief member is located within the slide, and when the positioning pin is placed at the positioning point, the relief member contacts the wall of the positioning pin; and the relief member is an elastic sheet. Claim 12 A positioning pin connected to a battery pack, wherein the positioning pin is combined with a positioning sheet according to any one of claims 1 to 5, and the positioning pin is provided with a second position limiting part that is combined with the first position limiting part to limit the movement of the battery pack along the axial direction of the positioning pin. Claim 13 A positioning pin according to claim 12, wherein the first position limiting part is a recess and the second position limiting part is a protrusion, and the number of the second position limiting parts is a plurality; and wherein the plurality of the protrusions are arranged along the axial direction of the positioning pin or the plurality of the protrusions are arranged along the radial direction of the positioning pin. Claim 14 In claim 12, the second position limiting part and the positioning pin are an overall structure, or the second position limiting part and the positioning pin are detachably connected; the second position limiting part is installed over the positioning pin; the second position limiting part is rotatable with respect to the positioning pin; the positioning pin further includes an axle bumper installed on the cross-section of the positioning pin to prevent the second position limiting part from moving along the axial direction of the positioning pin; the second position limiting part is a shaft sleeve, and the shaft sleeve and the slide are transiently coupled. Claim 15 A positioning mechanism for fixing the position of a battery pack, wherein the positioning mechanism comprises a positioning sheet and a positioning pin according to any one of claims 1 to 5, wherein the positioning pin is combined with the positioning sheet, and the positioning pin is provided with a second position limiting part that is combined with the first position limiting part to limit the movement of the battery pack along the axial direction of the positioning pin, and the positioning pin is installed on the battery pack, and the positioning mechanism limits the battery pack from deviating from the positioning sheet along the axial direction of the positioning pin; or, the positioning mechanism comprises a positioning sheet and a positioning pin according to any one of claims 6 to 11—where the positioning pin is installed on the battery pack and the positioning pin enters the slide from the opening. Claim 16 A quick change bracket assembly for mounting a battery pack, comprising a quick change bracket, wherein the quick change bracket assembly further comprises a positioning mechanism according to claim 15, and the positioning sheet is installed on the quick change bracket. Claim 17 A quick-change bracket assembly for mounting a battery pack to an electric vehicle, comprising a quick-change bracket, a locking mechanism, and a positioning mechanism, wherein the locking mechanism and the positioning mechanism are both installed on the quick-change bracket, wherein the locking mechanism locks the battery pack to the electric vehicle to restrict the battery pack from moving along the driving direction of the electric vehicle; A quick change bracket assembly characterized by the positioning mechanism being configured to satisfy any one of the following (i) and (ii): (i) the positioning mechanism includes a positioning sheet according to claim 1, and the positioning sheet restricts the battery pack from moving in a direction perpendicular to the driving direction within a horizontal plane; (ii) the positioning mechanism includes a positioning sheet, and the positioning sheet restricts the battery pack from moving along a vertical direction, and the positioning sheet includes a positioning sheet body, and an opening and a slide extending from the opening are installed on the side of the positioning sheet body, and the opening is intended to allow a positioning pin of the battery pack to enter the slide, and the positioning sheet further includes a clamping device, and the clamping device is installed within the slide, and when the positioning pin is placed at a positioning point, the clamping device comes into contact with the positioning pin along a vertical direction. Claim 18 A quick change bracket assembly according to claim 17, wherein the positioning mechanism comprises a slide positioning mechanism for restricting the movement of the battery pack along a direction perpendicular to the driving direction within a horizontal plane; the slide positioning mechanism comprises a slide sheet connected to the quick change bracket and coupled with a slide pin in the battery pack; an opening and a slide extending from the opening are installed on the side of the slide sheet to allow the slide pin to enter the slide; a first position limiting part is installed within the slide of the slide sheet, and a second position limiting part is installed on the slide pin to restrict the movement of the battery pack along the axial direction of the slide pin in coupled with the first position limiting part. Claim 19 In claim 17, the positioning mechanism comprises a double swing positioning mechanism for restricting the movement of the battery pack along a vertical direction; the double swing positioning mechanism comprises a double swing seat and a double swing pin, wherein the double swing seat is connected to the quick change bracket and the double swing pin is connected to the battery pack; an opening and a slide extending from the opening are installed on the side of the double swing seat to allow the double swing pin to enter the slide; and the double swing seat further comprises a clamping device installed within the slide that, when the double swing pin is placed at a positioning point, contacts the double swing pin along a vertical direction to restrict the movement of the battery pack along a vertical direction. Claim 20 An electric vehicle characterized by comprising a battery pack and a quick-change bracket assembly according to any one of claims 17 to 19.

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