A quick release device for a battery pack and a chassis assembly having the quick release device

Abstract

The utility model relates to the field of chassis, specifically a quick-release device for a battery pack and a chassis assembly with the quick-release device, comprising a pack disassembly mechanism; the pack disassembly mechanism comprises a hanging mechanism; the hanging mechanism comprises a mounting block arranged on the battery pack and a battery mounting frame arranged on a vehicle frame, and the battery mounting frame is provided with an embedded sink; the utility model, through the use of the quick-release device, not only facilitates the installation and assembly of the battery pack on the vehicle frame, but also facilitates the subsequent detachment of the battery pack from the vehicle frame when thermal runaway occurs, thereby avoiding greater losses.

Description

Technical Field

[0001] The utility model relates to the field of chassis, in particular to a quick-release device for a battery pack and a chassis assembly with the quick-release device. Background Art

[0002] With the development of the new energy vehicle industry, the market share of new energy vehicles is increasing. Power lithium-ion batteries have been widely used in electric vehicles due to their advantages such as high energy density, long life and environmental protection.

[0003] However, during use, high-energy-density power batteries can easily cause thermal runaway of the battery pack due to bumps, collisions, water ingress, insulation, etc., and even fire and explosion, endangering the lives and property safety of passengers. If the battery pack of an electric vehicle fails to be removed in time after thermal runaway, it may cause a greater safety accident.

[0004] At the same time, in the event of thermal runaway of the battery pack, disassembly of the battery pack requires higher safety and operational efficiency to avoid harm to the operator and avoid secondary accidents.

[0005] The invention patent with the authorization announcement number CN112670648B discloses a battery pack and an electric vehicle, wherein the battery pack includes a battery tray and a battery, wherein the battery tray includes an annular frame, wherein the frame has two first side portions arranged opposite to each other, wherein the lower ends of the two first side portions are respectively provided with flange portions extending in a direction close to each other, and the battery is located above the flange portions and connected to the upper surface of the flange portions. According to the battery pack of the invention, by making the flange portions of the two first side portions respectively connected to the battery, it is avoided to set up a separate mounting part between the battery and the frame, which is conducive to simplifying the structure of the battery pack, reducing the weight of the battery pack, and further conducive to improving the energy density of the battery pack.

[0006] Although the above technical solutions have corresponding advantages, the battery packs of the above technical solutions are directly fixed on the electric vehicle using fastening bolts or screws. When the vehicle collides, the battery pack cannot be automatically detached from the electric vehicle to automatically detach from the vehicle body. Since the battery pack mainly provides power supply, a fire may occur after a collision. The battery pack is fixed on the vehicle and cannot fall off. After the battery pack catches fire, the vehicle will be further burned, causing a fire in the entire vehicle, affecting the life safety of the driver and cabin personnel, and posing certain safety hazards.

[0007] In order to improve the above problems, it is necessary to optimize the design of the existing battery pack structure or its connection structure. Utility Model Content

[0008] The utility model aims to provide a quick-release device which can be used for connecting a battery pack and can facilitate the subsequent quick release of the battery pack.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] A quick-release device for a battery pack, comprising a pack body disassembly mechanism;

[0011] The package disassembly mechanism includes a hooking mechanism; the hooking mechanism includes a mounting block arranged on the battery package and a battery mounting frame arranged on the vehicle frame, and the battery mounting frame is provided with an embedded sink.

[0012] The mounting block is a wedge-shaped block; the embedded sink groove is a wedge-shaped groove.

[0013] A pulley track is arranged in the embedded sinking groove.

[0014] The package disassembly mechanism also includes a pressing mechanism used in conjunction with the hanging mechanism, and the pressing mechanism includes a push rod motor arranged on the vehicle frame.

[0015] The quick release device also includes a lateral limiting mechanism, which is provided with a limiting block and a pressing block on the frame, and the pressing block is connected to the limiting block via a compression spring.

[0016] The limit block is provided with a placement groove; a guide column is provided in the placement groove, and a guide countersunk hole is provided on the top pressure block; the top pressure block is sleeved on the guide column through the guide countersunk hole; and the extrusion spring is sleeved on the guide column.

[0017] The quick-release device also includes a plug-in disassembly mechanism; the plug-in disassembly mechanism includes a plug-in servo motor connected to the quick-connect plug-in.

[0018] A vehicle chassis assembly comprises a vehicle frame, on which a battery pack is mounted; the battery is connected to the vehicle frame via a quick-release device.

[0019] The advantages of the utility model are:

[0020] The utility model discloses a quick-release device for a battery pack and a chassis assembly with the quick-release device.

[0021] The utility model uses the quick-release device, which not only facilitates the installation and assembly of the battery pack on the frame, but also facilitates the subsequent detachment of the battery pack from the frame when thermal runaway occurs, thereby avoiding greater losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following is a brief description of the contents expressed in each of the drawings of the utility model specification and the marks in the drawings:

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is the front view of the utility model.

[0025] Figure 3 It is an exploded view of the utility model.

[0026] Figure 4 It is a bottom view of the lateral limiting mechanism in the utility model.

[0027] Figure 5 It is a structural schematic diagram of the lateral limiting mechanism of the utility model when it is installed on the vehicle frame.

[0028] The marks in the above figure are:

[0029] 1. Frame, 2. Battery pack, 3. Battery mounting bracket, 4. Push rod motor, 5. Lateral limit mechanism, 6. Plug-in servo motor. DETAILED DESCRIPTION

[0030] The specific implementation methods of the present utility model will be further explained in detail below by describing the optimal embodiments with reference to the accompanying drawings.

[0031] A quick-release device for a battery pack 2 includes a pack body disassembly mechanism. The utility model not only facilitates the installation and assembly of the battery pack 2 on the frame 1, but also facilitates the subsequent detachment of the battery pack 2 from the frame 1 when thermal runaway occurs, thereby avoiding greater losses.

[0032] In the utility model, the package disassembly mechanism includes a hanging mechanism; the hanging mechanism includes a mounting block 21 arranged on the battery pack 2 and a battery mounting frame 3 arranged on the frame 1, and the battery mounting frame 3 is provided with an embedded sink 31; in the utility model, the battery mounting frame 3 is generally welded or fixedly connected to the frame 1, acting as a connecting piece to facilitate the subsequent hanging and installation of the battery pack 2 on the frame 1, and in the utility model, an embedded sink 31 is provided on the battery mounting frame 3, and the embedded sink 31 makes the battery mounting frame 3 form a barb structure; it facilitates the hanging of the battery pack 2, and in order to facilitate the hanging of the battery pack 2, a mounting block 21 is provided on the outside of the battery pack 2, and the battery pack 2 is hung in the embedded sink 31 through the mounting block 21 during subsequent use.

[0033] At the same time, in the utility model, the embedded groove 31 is connected to the side of the battery mounting frame 3; and the embedded groove 31 is set through the battery mounting frame 3; based on such a setting, not only the installation interference between the mounting block 21 and the battery mounting frame 3 can be reduced, but also the subsequent disengagement operation can be facilitated.

[0034] Furthermore, in the present invention, the mounting block 21 is a wedge-shaped block; the embedded sink groove 31 is a wedge-shaped groove; in essence, it is required that the lower cross-section of the embedded sink groove 31 has an inclined surface. With such a setting, after the external force restraint of the subsequent mounting block 21 disappears, under the action of gravity, the battery pack 2 will drive the mounting block 21 to detach from the embedded sink groove 31 due to gravity, thereby realizing the detachment of the battery pack 2 from the frame 1.

[0035] Furthermore, in the utility model, a pulley track 32 is provided in the embedded groove 31; in the utility model, the setting of the pulley track 32 reduces the friction between the embedded groove 31 and the mounting block 21, thereby facilitating the subsequent separation of the battery pack 2 and the battery mounting frame 3; the pulley track 32 is essentially a roller structure embedded on the inner side surface of the lower end of the embedded groove 31, so that the sliding friction between the embedded groove 31 and the mounting block 21 is changed to rolling friction.

[0036] Furthermore, the package disassembly mechanism described in the utility model also includes a pressing mechanism used in conjunction with the hanging mechanism. The function of the pressing mechanism is to provide lateral extrusion force for the mounting block 21, so as to facilitate the position of the mounting block 21 to be limited during subsequent use, thereby preventing the mounting block 21 from detaching from the battery mounting frame 3.

[0037] Specifically, in the present invention, the pressing mechanism includes a push rod motor 4 disposed on the frame 1 ; the piston rod of the push rod motor 4 presses against the side of the mounting block 21 , and cooperates with the battery mounting frame 3 to achieve position limitation of the mounting block 21 .

[0038] Furthermore, the quick-release device in the present invention also includes a lateral limiting mechanism 5, which plays a good lateral limiting role, mainly performing lateral extrusion limiting on the battery pack 2, so as to better ensure the stability of the placement position of the battery pack 2.

[0039] Specifically, in the utility model, the lateral limiting mechanism 5 is provided with a limiting block 51 and a top pressure block 52 on the frame 1, and the top pressure block 52 is connected to the limiting block 51 through an extrusion spring 53; the limiting block 51 of the utility model is directly connected to the frame 1, and the top pressure block 52 acts as an extrusion block, and the top pressure block 52 is in contact with the battery pack 2, and the extrusion limitation of the side of the battery pack 2 is achieved through the mutual cooperation between the limiting block 51 and the top pressure block 52; at the same time, the extrusion spring 53 plays a good shock-absorbing and energy-absorbing role, which can not only avoid the rigid collision between the top pressure block 52 and the battery pack 2, but also absorb energy and buffer the shaking of the battery pack 2.

[0040] Furthermore, in the utility model, a placement groove is provided on the limit block 51; a guide column 54 is provided in the placement groove, and a guide countersunk hole is provided on the top pressure block 52; the top pressure block 52 is sleeved on the guide column 54 through the guide countersunk hole; the extrusion spring 53 is sleeved on the guide column 54; the setting of the placement groove forms a placement groove for the top pressure block 52 on the limit block 51; the inner wall of the placement groove also plays a good guiding role; it is beneficial to ensure the linearity of the movement of the top pressure block 52. At the same time, the setting of the guide column 54 and the guide countersunk hole ensures that there is a longitudinal supporting force between the top pressure block 52 and the limit block 51, avoiding the top pressure block 52 from being misplaced due to gravity when the lateral limit mechanism 5 is arranged horizontally.

[0041] Furthermore, in the utility model, the quick-release device also includes a plug-in disassembly mechanism; the plug-in disassembly mechanism includes a plug-in servo motor 6 connected to the quick connector; in the utility model, the plug-in disassembly mechanism is convenient for controlling the quick connector to be connected or disassembled with the battery pack 2 in subsequent use; in the utility model, the plug-in servo motor 6 is fixedly connected to the frame 1, and the position of the quick connector on the battery pack 2 is controlled by the action of the plug-in servo motor 6.

[0042] A vehicle chassis assembly includes a frame 1, on which a battery pack 2 is mounted; the battery pack 2 is connected to the frame 1 via a quick-release device; based on such a configuration, the battery pack 2 can be automatically separated from the frame 1 under the control of a control system, thereby avoiding greater losses caused by fire of the battery pack 2.

[0043] specific;

[0044] The quick-release device disclosed in the utility model is mainly a system solution for quickly disassembling the battery pack 2 when the battery pack 2 suffers from thermal runaway.

[0045] Its main structure includes a vehicle frame 1, a battery pack 2, a battery mounting frame 3, a mounting block 21, a top pressing mechanism, a lateral limiting mechanism 5, a plug-in removal mechanism, a BMS module, a VCU module, and an MCU module.

[0046] When thermal runaway occurs inside battery pack 2 due to collision, extrusion, short circuit, water ingress, etc., BMS detects the cell voltage, temperature, and insulation value of battery pack 2. When two of the following judgment conditions are met and triggered simultaneously, it is determined that thermal runaway occurs in battery pack 2. BMS sends a thermal runaway signal to the VCU module. After receiving the signal, the VCU module sends a separation instruction to the MCU module. The MCU first pushes the plug-in servo motor 6, which pushes the push rod piston to separate the quick-change plug-in. Then the other four push rod motors 4 push the push rod piston to separate from battery pack 2. The wedge block installed in battery pack 2 is separated from the frame 1 and the elastic limit block through the pulley track 32.

[0047] This system can not only separate the battery pack 2 from the vehicle frame 1 under the high-voltage state of the vehicle, but also after the vehicle is powered off, the BMS wakes itself up through the AFE, and by judging several thermal runaway trigger conditions, wakes up the vehicle network to report the thermal runaway signal, realizes 24-hour monitoring of the vehicle, and can separate the battery pack 2 from the frame 1 in the first place to avoid greater losses.

[0048] The utility model can send a thermal runaway signal to the MCU module through the BMS after the thermal runaway of the battery pack 2 occurs, and the MCU controls the push rod mechanism to quickly separate the battery pack 2 and the plug-in.

[0049] The advantage of the present invention is that the battery pack 2 can be separated from the vehicle at the first moment when the battery pack 2 thermally runs away, thereby avoiding further losses to the passengers and the vehicle.

[0050] Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A quick release device for a battery pack, characterized in that: Including a package body disassembly mechanism; The package disassembly mechanism includes a hanging mechanism; the hanging mechanism includes a mounting block arranged on the battery package and a battery mounting frame arranged on the vehicle frame, and the battery mounting frame is provided with an embedded sink.

2. A quick release device for a battery pack according to claim 1, characterized in that: The mounting block is a wedge-shaped block; the embedded sink groove is a wedge-shaped groove.

3. A quick release device for a battery pack according to claim 2, characterized in that: A pulley track is arranged in the embedded sinking groove.

4. A quick release device for a battery pack according to claim 1, characterized in that: The package disassembly mechanism also includes a pressing mechanism used in conjunction with the hanging mechanism, and the pressing mechanism includes a push rod motor arranged on the vehicle frame.

5. The quick release device for a battery pack according to claim 1, characterized in that: The quick release device also includes a lateral limiting mechanism, which is provided with a limiting block and a pressing block on the frame, and the pressing block is connected to the limiting block via a compression spring.

6. A quick release device for a battery pack according to claim 5, characterized in that: The limit block is provided with a placement groove; a guide column is provided in the placement groove, and a guide countersunk hole is provided on the top pressure block; the top pressure block is sleeved on the guide column through the guide countersunk hole; and the extrusion spring is sleeved on the guide column.

7. A quick release device for a battery pack according to claim 1, characterized in that: The quick-release device also includes a plug-in disassembly mechanism; the plug-in disassembly mechanism includes a plug-in servo motor connected to the quick-connect plug-in.

8. A vehicle chassis assembly, characterized in that: It comprises a frame on which a battery pack is mounted; the battery is connected to the frame via a quick-release device as described in any one of claims 1-7.

Images