Vehicle battery lifting device and vehicle battery lifting method

Abstract

The invention provides a vehicle battery lifting device and a vehicle battery lifting method. The vehicle battery lifting device and the vehicle battery lifting method have good reliability. The vehicle battery lifting device is used for assembling a battery unit on a vehicle body from the bottom surface side of the vehicle body, and comprises a battery carrying tray which is provided with a carrying surface for carrying the battery unit; the lifting mechanism is used for enabling the battery carrying tray to move in the lifting direction; and a plurality of cylinders for adjusting a horizontal inclination angle of the placement surface of the battery placement tray, and when the lifting mechanism lifts the battery placement tray and the battery unit or the battery placement tray is in contact with a vehicle body at a first position, air in the cylinders at least close to the first position is discharged.

Description

Technical Field

[0001] This invention relates to a vehicle battery lifting device and a vehicle battery lifting method. Background Technology

[0002] In recent years, research and development has been conducted on secondary batteries that contribute to energy efficiency in order to ensure access to affordable, reliable, sustainable and advanced energy for more people.

[0003] Unlike primary batteries, which cannot be recharged, secondary batteries refer to rechargeable and dischargeable batteries, and are used as power sources for energy storage systems (ESS), electric vehicles (EVs) or hybrid electric vehicles (HEVs), and small high-tech electronic devices such as mobile phones, personal digital assistants (PDAs), and laptops. Specifically, in automotive secondary battery technologies, a crucial issue is how to reliably mount the secondary battery onto the vehicle body during the vehicle assembly process.

[0004] Normally, when something is fixed to a vehicle body, it is secured by the axial force applied during tightening, ensuring a tight seal. However, since a single secondary battery (cell) cannot currently provide sufficient output to power an electric vehicle, in order to use a secondary battery as an energy source for an electric vehicle (e.g., a battery module with multiple lithium-ion battery cells connected in series and / or parallel), the battery pack is typically configured to include a Battery Management System (BMS) for connecting the battery modules in series and functionally maintaining them, a cooling system, a Battery Disconnection Unit (BDU), electrical wiring, etc. This results in a heavy and large-sized automotive battery cell, which in turn increases the overall weight of the clamps holding the battery cells, necessitating a very large payload capacity for the lifting mechanism used to raise and lower the automotive battery cells for assembly. In the above situation, when attempting to closely connect the vehicle body and the vehicle battery unit, the overall weight of the vehicle, which combines the vehicle body and the vehicle battery unit, will be applied to the lift, which may cause the lift to become overloaded and potentially damaged. Alternatively, to avoid the risk of damage, the lift may need to have an extremely high overload capacity.

[0005] In the prior art, prior art document 1 discloses a battery cell assembly device. During battery cell assembly, a spring, acting as an elastic element, is provided between a worktable for holding the battery cells and a lifting mechanism. The spring generates elasticity to maintain the horizontal position of the mounting surface of the worktable for holding the battery cells. Furthermore, a guide member is provided on the worktable for holding the battery cells. Based on the contact between the guide members, the mounting surface on the worktable can be reliably made approximately parallel to the bottom surface of the vehicle. Thus, the battery cell assembly device of prior art document 1, by tilting the mounting surface for holding the battery cells approximately parallel to the bottom surface of the vehicle, prevents the battery cells from contacting the vehicle, thereby avoiding the application of strong loads to a portion of the battery cells. This allows for easy and reliable assembly of the battery cells into the vehicle with a simple structure, even when the vehicle body is tilted.

[0006] However, in prior art document 1, the contact between the reference guide and the general guide in the guiding component also poses a risk of wear to the general guide. If the general guide wears, the battery cell placed on the mounting surface of the workbench will be installed at an angle relative to the bottom surface of the vehicle, still subjecting a portion of the battery cell to additional load. Furthermore, during battery cell assembly, one side of the battery cell (the relatively lower side in the vertical direction) is subjected to spring reaction force, thus posing a risk of spring deterioration and battery cell damage.

[0007] This invention aims to solve the aforementioned problem by reliably assembling automotive battery cells into vehicles. Furthermore, it contributes to energy efficiency.

[0008] [Existing Technical Documents]

[0009] [Patent Literature]

[0010] [Patent Document 1] Japanese Patent Publication No. 6048153 Summary of the Invention

[0011] This invention provides a vehicle battery lifting device and a vehicle battery lifting method, which have good reliability.

[0012] This invention provides a vehicle battery lifting device for assembling battery units onto a vehicle body from the bottom side. The device includes: a battery mounting tray having a mounting surface for mounting the battery units; a lifting mechanism for moving the battery mounting tray along a lifting direction; and a plurality of cylinders for adjusting the horizontal tilt angle of the mounting surface of the battery mounting tray. When the lifting mechanism raises the battery mounting tray and the battery units or the battery mounting tray contact the vehicle body at a first position, air is expelled from at least the cylinders near the first position.

[0013] This invention provides a method for lifting a vehicle battery, comprising: a pressure setting step, wherein supporting pressure and releasing pressure are set for a plurality of cylinders disposed between a battery mounting tray and a lifting mechanism and corresponding to a battery cell; a battery supporting step, wherein the supporting pressure is used to support the battery mounting tray on which the battery cell is mounted; and a lifting step, wherein the lifting mechanism is used to lift the battery mounting tray, and in the lifting step, the lifting mechanism raises the battery mounting tray until the air pressure of all the cylinders exceeds the set releasing pressure, and all the plurality of cylinders are in an exhaust state.

[0014] In one embodiment of the present invention, the battery mounting tray is supported by a support pressure set by each of the cylinders, and each of the cylinders is set with a release pressure above the support pressure. When the air pressure in any of the cylinders reaches its set release pressure, the air in any of the cylinders is discharged, so that the air pressure in any of the cylinders is lower than its set release pressure.

[0015] In one embodiment of the invention, when the air pressure of all the plurality of cylinders exceeds the set release pressure due to contact, the lifting mechanism raises the battery mounting tray until all the plurality of cylinders are in the exhaust state.

[0016] In one embodiment of the present invention, the release pressure of the cylinder after the battery mounting tray is raised by the lifting mechanism is set to be lower than the release pressure of the cylinder before the battery mounting tray is raised by the lifting mechanism.

[0017] In one embodiment of the present invention, the vehicle battery lifting device further includes: a detection unit for detecting whether there is contact between the battery cell or the battery mounting tray and the vehicle body, and controlling the discharge of air from the cylinder based on the contact situation.

[0018] In one embodiment of the present invention, the vehicle battery lifting device further includes: a sliding unit disposed between the cylinder and the lifting mechanism, the sliding unit enabling the battery unit and the battery mounting tray to slide in a direction perpendicular to the lifting direction.

[0019] In one embodiment of the present invention, the vehicle battery lifting device further includes: a positioning pin for fixing the battery unit to the mounting surface of the battery mounting tray, and the battery mounting tray has a sliding mechanism that can adjust the positioning pin on a plane perpendicular to the lifting direction.

[0020] Based on the above, in the vehicle battery lifting device and vehicle battery lifting method of the embodiments of the present invention, the battery mounting tray for mounting the battery unit and the lifting mechanism for raising and lowering the battery mounting tray relative to the vehicle are supported by a cylinder. The cylinder assembles the battery unit by tilting the mounting surface relative to the bottom surface of the vehicle at a predetermined angle in response to the contact between the battery unit or the battery mounting tray and the bottom surface of the vehicle. Here, the predetermined angle refers to the angle suitable for fixing the battery unit to the vehicle. Therefore, even when the vehicle is tilted, the battery unit can be easily assembled into the vehicle with a simple structure. Furthermore, by using the increased pressure upon contact as a trigger mechanism for whether to expel air from the cylinder, the vehicle battery lifting device can prevent the increase of load through a simple configuration, thereby reducing the total load at the contact point and protecting the battery unit. This allows the lifting mechanism to handle the overload capacity of the battery unit load, the weight of the clamp, and the reaction force of the floating mechanism, without having to withstand a load exceeding the necessary weight, such as the weight of the vehicle, and thus preventing overload abnormalities. Furthermore, since the mounting surface of the battery cell is also inclined in a roughly parallel manner to the bottom surface of the vehicle body, axial force is not lost when fixing the battery cell to the vehicle body, allowing the battery cell to be more securely fixed to the vehicle body. In addition, by controlling the air pressure in the cylinder, the vehicle battery lifting device can change the tilt of the battery mounting tray more quickly, thereby improving the installation speed of the battery cell.

[0021] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0022] Figure 1A This is an exploded view of a vehicle battery lifting device according to an embodiment of the present invention;

[0023] Figure 1B yes Figure 1A The diagram shows the architecture of a vehicle battery lifting device.

[0024] Figure 2A and Figure 2B These are schematic diagrams showing the dimensions of battery cells of different sizes;

[0025] Figure 2C and Figure 2D These are a top view and a side view of the battery unit positioned on the battery tray.

[0026] Figure 2E The battery cell is positioned in Figure 1B The diagram shows the architecture of a vehicle battery lifting device.

[0027] Figures 3 to 6This is a schematic diagram of the battery unit being assembled onto the vehicle body from the bottom side.

[0028] Figure 7A This is a schematic diagram of the cylinder structure;

[0029] Figure 7B and Figure 7C This is a schematic diagram showing the pressure changes inside the cylinder when the battery unit is assembled into the vehicle body.

[0030] Figure 8A This is a top view of the position of the floating mechanism on the battery cell;

[0031] Figure 8B and Figure 8C This is a side view diagram of the floating mechanism and the battery unit viewed from different sides.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100: Vehicle battery lifting device

[0034] 110: Battery mounting tray

[0035] 111: Sliding Mechanism

[0036] 120: Lifting mechanism

[0037] 130, 130A, 130B, 130C, 130D: Cylinders

[0038] 140: Sliding unit

[0039] AH: Secondary reference hole

[0040] CB: Vehicle body

[0041] D1: First Direction

[0042] D2: Second Direction

[0043] D3: Lifting / Locking Direction

[0044] FL: Floating mechanism

[0045] IPU: Battery Unit

[0046] MH: Main reference hole

[0047] P1: First position

[0048] PN: Positioning pin

[0049] S1: Placement surface. Detailed Implementation

[0050] Figure 1A This is an exploded view of a vehicle battery lifting device according to an embodiment of the present invention; Figure 1B yes Figure 1A The diagram shows the architecture of a vehicle battery lifting device. Figure 2A and Figure 2B These are schematic diagrams showing the dimensions of battery cells of different sizes; Figure 2C and Figure 2D These are a top view and a side view of the battery unit positioned on the battery tray. Figures 3 to 6 This is a schematic diagram of the battery unit being assembled onto the vehicle body from the bottom side. Figure 7A This is a schematic diagram of the cylinder structure; Figure 7B and Figure 7C This is a schematic diagram showing the pressure changes inside the cylinder when the battery unit is assembled into the vehicle body. Figure 8A This is a top view of the position of the floating mechanism on the battery cell; Figure 8B and Figure 8C This is a side view diagram of the floating mechanism and battery unit viewed from different sides. In this specification, the directions in space are determined based on the lifting direction D3 of the lifting mechanism 120 of the vehicle battery lifting device 100 and a plane perpendicular to the lifting direction D3. The following will use... Figures 1A to 8C This describes the specific structure of the vehicle battery lifting device 100 and the steps involved in performing the vehicle battery lifting method.

[0051] Please refer to Figures 1A to 2E In this embodiment, the vehicle battery lifting device 100 can be used to assemble the battery unit IPU onto the vehicle body CB from the bottom side, and the vehicle battery lifting device 100 includes a battery mounting tray 110, a lifting mechanism 120, a positioning pin PN, a sliding unit 140, and multiple cylinders 130. Specifically, as Figure 1A and Figure 1B As shown, in this embodiment, the battery mounting tray 110 has a mounting surface S1 for mounting the battery unit IPU. The lifting mechanism 120 is used to move the battery mounting tray 110 along the lifting direction D3. Furthermore, the positioning pin PN is used to fix the battery unit IPU onto the mounting surface S1 of the battery mounting tray 110, and the battery mounting tray 110 has a sliding mechanism 111 capable of adjusting the positioning pin PN in a plane perpendicular to the lifting direction D3. Further, as... Figure 1A and Figure 1B As shown, in this embodiment, the sliding mechanism 111 allows one of the positioning pins PN to move along a first direction D1 and a second direction D2 that are orthogonal to each other in a plane perpendicular to the lifting direction D3. Thus, through the configuration of the positioning pin PN and the sliding mechanism 111, the positioning pin PN can be used to position battery unit IPUs of different sizes. For example, as... Figure 2A and Figure 2B As shown, Figure 2A The battery cell IPUA and Figure 2BThe battery unit IPUB has different sizes, in Figure 2A The battery cell IPUA and Figure 2B The battery unit IPUB has a main reference hole MH and secondary reference holes AHA and AHB on its diagonal sides for the positioning pin PN to pass through for fixing, and, as Figure 2C and Figure 2D As shown, when Figure 2A battery cell IPUA or Figure 2B When the battery unit IPUB is fixed on the mounting surface S1 of the battery mounting tray 110, one of the positioning pins PN can be kept fixed after being aligned with the main reference hole MH, and the sliding mechanism 111 moves the position of the other positioning pin PN so that it is aligned with the secondary reference hole AHA of the battery unit IPUA or the secondary reference hole AHB of the battery unit IPUB, and then proceeds... Figure 2A battery cell IPUA or Figure 2B The battery unit IPUB is fixed to the battery mounting tray 110. Thus, as... Figure 2E As shown, regardless of its size, the battery unit IPU can be fixed to the mounting surface S1 of the battery mounting tray 110 by the positioning pin PN.

[0052] Furthermore, a sliding unit 140 is disposed between the cylinder 130 and the lifting mechanism 120, and enables the battery unit IPU and the battery mounting tray 110 to slide in a direction perpendicular to the lifting direction D3, for adjusting the horizontal relative position of the battery unit IPU and the vehicle body CB when assembling the battery unit IPU onto the vehicle body CB. On the other hand, in this embodiment, the plurality of cylinders 130 can be used to adjust the horizontal tilt angle of the mounting surface S1 of the battery mounting tray 110, so that the battery unit IPU can be assembled onto the vehicle body CB from the bottom side regardless of how the vehicle body CB is tilted. The following will be accompanied by... Figures 3 to 8C The process of assembling the battery unit IPU onto the vehicle body CB will be explained in further detail.

[0053] Specifically, in this embodiment, the vehicle battery lifting device 100 can be used to perform... Figures 3 to 6 The illustrated vehicle battery lifting method includes a pressure setting step, a battery support step, and a lifting step. Further, in the pressure setting step of this embodiment, the vehicle battery lifting device 100 sets the support pressure and release pressure of a plurality of cylinders 130 disposed between the battery mounting tray 110 and the lifting mechanism 120 and corresponding to the battery unit IPU. In the battery support step of this embodiment, the vehicle battery lifting device 100 uses the support pressure to support the battery mounting tray 110 on which the battery unit IPU is mounted. That is, as shown... Figures 3 to 6As shown, in this embodiment, the battery mounting tray 110 is supported by the support pressure set by each cylinder 130.

[0054] Furthermore, in this embodiment, as Figures 7A to 7C As shown, a release pressure can be set for each cylinder 130. When the air pressure in any cylinder 130 reaches its set release pressure, the air in that cylinder 130 can be discharged, causing the air pressure in that cylinder 130 to fall below its set release pressure. For example, in this embodiment, the release pressure of each cylinder 130 is set to be above its support pressure.

[0055] Thus, by setting the release pressure of each cylinder 130 above its support pressure, before the battery unit IPU or battery mounting tray 110 contacts the vehicle body CB, the air pressure inside each cylinder 130 will not reach its set release pressure, and the vehicle battery lifting device 100 will not expel the air from the cylinder 130, nor can the air escape. However, when the battery unit IPU or battery mounting tray 110 contacts the vehicle body CB, the additional pressure caused by the weight of the vehicle body CB may cause the air pressure inside each cylinder 130 to reach its set release pressure. At this time, if... Figure 7B and Figure 7C As shown, the vehicle battery lifting device 100 can correspondingly discharge air from the cylinders 130, thereby controlling the air pressure in each cylinder 130. Furthermore, as... Figures 8A to 8C As shown, in this embodiment, the lifting mechanism 120 has a floating mechanism FL. When the battery unit IPU or the battery mounting tray 110 contacts the vehicle body CB, the floating mechanism FL is activated by the contact force, allowing the vehicle body CB and the battery unit IPU to maintain close contact. Thus, by using the increased pressure during contact as a trigger mechanism for whether to expel air from the cylinder 130, the increased load can be prevented through a simple configuration, thereby reducing the total load at the contact point and protecting the battery unit IPU.

[0056] On the other hand, in the lifting step of this embodiment, the vehicle battery lifting device 100 uses the lifting mechanism 120 to lift and lower the battery mounting tray 110. Furthermore, in this embodiment, the vehicle battery lifting device 100 can set the release pressure of the cylinder 130 after the battery mounting tray 110 is raised by the lifting mechanism 120 to be lower than the release pressure of the cylinder 130 before the battery mounting tray 110 is raised by the lifting mechanism 120. Thus, before the lifting mechanism 120 is raised, by increasing the release pressure of the cylinder 130, the cylinder 130 will not reach its set release pressure threshold due to the acceleration and deceleration of the lifting mechanism 120, triggering the expulsion of air from the cylinder 130 and causing the space within the cylinder 130 to contract, thereby allowing the lifting mechanism 120 to move smoothly. In addition, by lowering the set value of the release pressure of the cylinder 130 after placing the battery unit IPU and increasing the stroke of the cylinder 130, the initial load when the vehicle body CB, battery unit IPU, and battery mounting tray 110 come into contact can be suppressed.

[0057] For example, such as Figure 3 As shown, in this embodiment, when the battery unit IPU is initially assembled onto the vehicle body CB, Figure 3 The cylinder 130 shown can be accessed via, for example Figure 7B As shown, air is expelled from cylinder 130, thereby controlling the air pressure in each cylinder 130 and thus suppressing the initial load when the vehicle body CB, battery unit IPU, and battery mounting tray 110 come into contact.

[0058] Next, as Figure 4 As shown, in this embodiment, the sliding unit 140 allows the battery unit IPU and the battery mounting tray 110 to slide in a direction perpendicular to the lifting direction D3, so as to adjust the horizontal relative position of the battery unit IPU and the vehicle body CB when the battery unit IPU is assembled onto the vehicle body CB. In this way, the conical portion of the positioning pin PN is moved while in contact with the positioning hole of the vehicle body CB, thereby correcting the positional deviation of the positioning pin PN when it is inserted into the vehicle body CB.

[0059] Furthermore, such as Figure 5 As shown, in this embodiment, when the lifting mechanism 120 raises the battery mounting tray 110 and the battery unit IPU or the battery mounting tray 110 contacts the vehicle body CB at a first position P1, air in at least the cylinder 130 near the first position P1 is expelled. More specifically, in this embodiment, the vehicle battery lifting device 100 further includes a detection unit (not shown) for detecting whether contact occurs between the battery unit IPU or the battery mounting tray 110 and the vehicle body CB, and controlling the expulsion of air from the cylinder 130 based on the contact status.

[0060] For example, when the detection unit detects that the battery unit IPU or battery mounting tray 110 is in contact with the vehicle body CB at a first position P1, the air in the cylinder 130 closest to the first position P1 is expelled. Furthermore, as the battery mounting tray 110 is lifted by the lifting mechanism 120 and the battery unit IPU or battery mounting tray 110 contacts the vehicle body CB, the air in the cylinder 130 is compressed. Thus, by expelling air from at least the cylinder 130 closest to the first position P1, which is the contact point, the load is prevented from increasing, thereby reducing the load at the contact point. Therefore, excessive load is not applied to the contact point between the vehicle body CB and the battery unit IPU, and both the vehicle body CB and the battery unit IPU are protected. Moreover, since air can be expelled without increasing the pressure at the contact point, the load on the battery unit IPU can be reduced.

[0061] Furthermore, as the battery unit IPU is lifted from the bottom side of the vehicle body CB, the battery unit IPU will sequentially contact the area of ​​the vehicle body CB other than the first position P1, and in this embodiment, as... Figure 5 and Figure 6 As shown, when the air pressure of all the cylinders 130 exceeds their set release pressure due to contact, the lifting mechanism 120 raises the battery mounting tray 110 until all the cylinders 130 are in the exhaust state. During the lifting step, the lifting mechanism 120 raises the battery mounting tray 110 until the air pressure of all the cylinders 130 exceeds their set release pressure, and all the cylinders 130 are in the exhaust state.

[0062] Furthermore, such as Figure 7C As shown, the cylinder 130 can adjust the horizontal tilt angle of the mounting surface S1 of the battery mounting tray 110 by adjusting the air pressure in the cylinder 130. For example, as Figure 6 , Figure 7B and Figure 7C As shown, by reducing the air pressure in the cylinder 130 near the first position P1, which is the contact point, and increasing the air pressure in the cylinder 130 away from the first position P1, the height of the floating mechanism FL on the cylinder 130 can be changed, thereby changing the horizontal tilt angle of the mounting surface S1 of the battery mounting tray 110. Furthermore, as... Figure 8B and Figure 8CAs shown, by controlling the air pressure of cylinders 130 (cylinder 130A, cylinder 130B, cylinder 130C, and cylinder 130D) at different positions, the swing amplitude of the battery mounting tray 110 in different directions can be further controlled, thereby realizing the control of the pitch angle and roll angle of the battery mounting tray 110, and thus controlling the tilt of the battery mounting tray 110 in each direction. In this way, the mounting surface S1 of the battery mounting tray 110 for mounting the battery unit IPU can be tilted. Then, when the battery unit IPU is lifted from the bottom side of the vehicle body CB and comes into contact with the vehicle body CB, the vehicle battery lifting device 100 can control the air pressure in the cylinder 130 between the battery mounting tray 110 and the lifting mechanism 120 to mount the battery unit IPU in such a way that the mounting surface S1 of the battery mounting tray 110 is tilted approximately parallel to the bottom surface of the vehicle body CB. In this way, excessive load on the vehicle body CB and lift generated by contact can be suppressed. Furthermore, since the mounting surface of the battery unit IPU is also tilted approximately parallel to the bottom surface of the vehicle body CB, axial force is not lost when fixing the battery unit IPU and the vehicle body CB, and the battery unit IPU can be more firmly fixed to the vehicle body CB. Therefore, by controlling the air pressure in the cylinder 130, the vehicle battery lifting device 100 can change the tilt of the battery mounting tray 110 more quickly, and can make the mounting surface S1 of the battery mounting tray 110 and the mounting surface of the battery unit IPU parallel to the bottom surface of the vehicle body CB, thereby improving the installation speed of the battery unit IPU.

[0063] In this way, the vehicle battery lifting device 100 uses the increased pressure upon contact as a trigger mechanism to expel air from the cylinder 130. This simple configuration prevents load increases, reducing the total load at the contact point and protecting the battery unit IPU. Furthermore, the lifting mechanism 120 can handle the overload capacity of the battery unit IPU load, clamp weight, and the reaction force of the floating mechanism FL, without bearing a load exceeding the necessary weight, such as the vehicle weight, thus preventing overload abnormalities. In this embodiment, the configuration of the cylinder 130 and the floating mechanism FL eliminates the possibility of wear on other elastic components (such as springs) over time. It also allows adjustment of the floating force of the floating mechanism FL by changing the air pressure in the cylinder 130 according to changes in the size and weight of the battery unit IPU, ensuring close contact between the vehicle body CB and the battery unit IPU, thereby securely fixing the battery unit IPU to the vehicle body CB.

[0064] In summary, in the vehicle battery lifting device of the embodiments of the present invention, the battery mounting tray for holding the battery unit and the lifting mechanism for raising and lowering the battery mounting tray relative to the vehicle are supported by a cylinder. The cylinder assembles the battery unit by tilting the mounting surface relative to the bottom surface of the vehicle at a predetermined angle in response to contact between the battery unit or the battery mounting tray and the bottom surface of the vehicle. Here, the predetermined angle refers to the angle suitable for fixing the battery unit to the vehicle. Therefore, even when the vehicle is tilted, the battery unit can be easily assembled into the vehicle with a simple structure. Furthermore, by using the increased pressure upon contact as a trigger mechanism for whether to expel air from the cylinder, the vehicle battery lifting device can prevent the increase of load through a simple configuration, thereby reducing the total load at the contact point and protecting the battery unit. This allows the lifting mechanism to handle the overload capacity of the battery unit load, the weight of the clamp, and the reaction force of the floating mechanism without having to withstand a load exceeding the necessary weight, such as the weight of the vehicle, thus preventing overload abnormalities. Furthermore, since the mounting surface of the battery cell is also inclined in a roughly parallel manner to the bottom surface of the vehicle body, axial force is not lost when fixing the battery cell to the vehicle body, allowing the battery cell to be more securely fixed to the vehicle body. In addition, by controlling the air pressure in the cylinder, the vehicle battery lifting device can change the tilt of the battery mounting tray more quickly, thereby improving the installation speed of the battery cell.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle battery lifting device for mounting battery units to the vehicle body from the bottom side, characterized in that, include: A battery mounting tray has a mounting surface for mounting the battery cells; A lifting mechanism is provided to move the battery mounting tray along a lifting direction. as well as Multiple cylinders are used to adjust the horizontal tilt angle of the mounting surface of the battery mounting tray. When the lifting mechanism raises the battery mounting tray, and the battery cell or the battery mounting tray contacts the vehicle body at a first position, At least the air in the cylinder closest to the first position is expelled.

2. The vehicle battery lifting device according to claim 1, characterized in that, The battery mounting tray is supported by a support pressure set by each of the cylinders, and each of the cylinders is set with a release pressure exceeding the support pressure. When the air pressure in any of the cylinders reaches its set release pressure, the air in any of the cylinders is discharged, so that the air pressure in any of the cylinders is lower than its set release pressure.

3. The vehicle battery lifting device according to claim 2, characterized in that, When the air pressure in all of the plurality of cylinders exceeds the set release pressure due to contact, The lifting mechanism raises the battery mounting tray until all of the cylinders are in the exhaust state.

4. The vehicle battery lifting device according to claim 2, characterized in that, The release pressure of the cylinder after the battery tray is raised by the lifting mechanism is set to be lower than the release pressure of the cylinder before the battery tray is raised by the lifting mechanism.

5. The vehicle battery lifting device according to claim 1, characterized in that, Also includes: The detection unit is used to detect whether there is contact between the battery cell or the battery mounting tray and the vehicle body. Based on the contact conditions, the air discharge from the cylinder is controlled.

6. The vehicle battery lifting device according to claim 1, characterized in that, Also includes: A sliding unit is disposed between the cylinder and the lifting mechanism. The sliding unit enables the battery cell and the battery mounting tray to slide in a direction perpendicular to the lifting direction.

7. The vehicle battery lifting device according to claim 1, characterized in that, Also includes: Positioning pins are used to fix the battery unit to the mounting surface of the battery mounting tray, and The battery mounting tray has a sliding mechanism that allows adjustment of the positioning pin on a plane perpendicular to the lifting direction.

8. A method for raising and lowering a vehicle battery, characterized in that, include: The pressure setting step involves setting the support pressure and release pressure of multiple cylinders located between the battery mounting tray and the lifting mechanism and corresponding to the battery unit. The battery support step involves using support pressure to support the battery carrier tray on which the battery cells are mounted. The lifting step involves using the lifting mechanism to lift and lower the battery mounting tray. In the lifting step, The lifting mechanism raises the battery mounting tray until the air pressure of all the cylinders exceeds the set release pressure, and all of the cylinders are in the exhaust state.

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