Battery pack and vehicle

Abstract

This disclosure relates to a battery pack and a vehicle. The battery pack includes a frame, a protective plate, and a lifting device. The frame houses the battery cells; the protective plate is disposed at the bottom of the frame; and the lifting device drives the protective plate to move up or down to move away from or closer to the battery cells. Through this technical solution, during vehicle operation, when the battery pack faces different operating conditions, the lifting device can drive the protective plate to an appropriate position to address those conditions, thereby improving the protective effect.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack protection technology, and more particularly to a battery pack and vehicle. Background Technology

[0002] The reliability of the power battery's protection is crucial for the safe operation of a vehicle. The protective plate located at the bottom of the battery pack is an important component for battery pack protection; for example, it can prevent damage from flying stones. In related technologies, protective plates are mostly fixedly installed, which cannot provide targeted protection for the battery pack under different operating conditions, resulting in inadequate protection. Utility Model Content

[0003] To overcome the problems existing in the related technologies, this disclosure provides a battery pack and a vehicle.

[0004] According to a first aspect of the present disclosure, a battery pack is provided, comprising:

[0005] The frame is used to house the battery cells;

[0006] A protective plate is provided at the bottom of the frame; and

[0007] A lifting device is used to drive the protective plate to move away from or closer to the battery cell.

[0008] Optionally, the lifting device includes a mounting part and a driving part, wherein the mounting part is disposed on the frame, and the driving part is connected to the protective plate and can drive the protective plate to move.

[0009] Optionally, the lifting device is located at the corner of the frame and / or on the side beam of the frame.

[0010] Optionally, the lifting device is disposed on the longitudinal center line of the frame, or the lifting device is symmetrically disposed about the longitudinal center line of the frame.

[0011] Optionally, multiple lifting devices are provided, and all of the multiple lifting devices are located at the corner positions of the frame.

[0012] Optionally, multiple lifting devices are provided, and all of the multiple lifting devices are provided on the side beams of the frame. Specifically, only one lifting device is provided on one side beam, or at least two lifting devices are provided on one side beam.

[0013] Optionally, the lifting device is installed on the front beam and the rear beam of the frame, wherein the lifting device is connected to the two corners at the front end of the frame via connecting rods, and / or the lifting device is connected to the two corners at the rear end of the frame via connecting rods.

[0014] Optionally, multiple lifting devices are provided, with some of the lifting devices located at the corners of the frame and others located on the side beams of the frame.

[0015] Optionally, the lifting device includes one device, which is mounted on one of the front beam or the rear beam of the frame, and the other of the front beam or the rear beam is connected to the protective plate via a pivot.

[0016] Optionally, the battery pack further includes a spring connected between the frame and the protective plate, the spring being configured to allow the protective plate to move freely relative to the frame within a predetermined range.

[0017] Optionally, multiple springs are provided at intervals along the side beams of the frame.

[0018] Optionally, the battery pack further includes a connection structure connected between the frame and the protective plate, for maintaining the connection between the frame and the protective plate during the movement of the protective plate.

[0019] Optionally, the connection structure is an extension-contraction structure, wherein the extension-contraction structure is in an extended state when the protective plate is away from the battery cell, and in a contracted state when the protective plate is close to the battery cell.

[0020] Optionally, the frame and / or the protective plate are provided with a storage groove for avoiding the extension and retraction structure.

[0021] Optionally, the stretch-contraction structure includes one of the following configurations:

[0022] The telescopic structure includes an accordion fold structure, one end of which is connected to the frame and the other end of which is connected to the protective plate;

[0023] The extension and retraction structure includes a roller and a winding structure wound on the roller. The roller is disposed on the frame, and one end of the winding structure is connected to the roller and the other end is connected to the protective plate.

[0024] The connection structure includes a scissor lift structure, which includes a first rod and a second rod, the first rod and the second rod being hinged together, wherein the first rod is slidably connected to the protective plate.

[0025] Optionally, the connection structure includes a sliding connection structure.

[0026] Optionally, the sliding connection structure includes a slide rail extending along the movement direction of the protective plate and a slider slidably disposed in the slide rail, wherein one of the slide rail and the slider is disposed on the frame and the other is disposed on the protective plate.

[0027] Optionally, the battery pack further includes a sensor system for acquiring operational safety information of the battery pack, wherein the lifting device is configured to drive the protective plate based on the acquired operational safety information.

[0028] Optionally, the sensor system includes at least one of: a battery status monitoring sensor, a pressure relief valve pressure sensor, a road condition image capture device, and a guard plate impact sensor.

[0029] According to a second aspect of the present disclosure, a vehicle is provided that includes a battery pack comprising any of the foregoing embodiments.

[0030] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: The battery pack provided by this disclosure has a lifting device, which can drive the protective plate to rise or fall away from or near the battery cell. During vehicle operation, when the battery pack faces different operating conditions, the lifting device can drive the protective plate to an appropriate position to cope with the condition, thereby improving the protective effect. Furthermore, whether facing normal operating conditions or extreme conditions with a low probability of occurrence, the protective purpose can be achieved by driving the protective plate with the lifting device, thus achieving a protective effect comparable to redundant passive protection structures while occupying less volume and weight.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0033] Figure 1 This is an exploded view of the structure of a battery pack according to an exemplary embodiment.

[0034] Figure 2 This is a schematic diagram of the structure of a sensor system according to an exemplary embodiment.

[0035] Figure 3 This is a partial enlarged view of a battery pack according to an exemplary embodiment.

[0036] Figure 4This is a schematic diagram illustrating the structure of a battery pack omitting the battery cells and sensor system according to an exemplary embodiment.

[0037] Figures 5a to 5j This is a schematic diagram illustrating different arrangements of a lifting device according to an exemplary embodiment.

[0038] Figure 6 This is a schematic diagram of a lifting device according to an exemplary embodiment.

[0039] Figures 7a to 7j This is a schematic diagram illustrating different connection structures according to an exemplary embodiment.

[0040] Figure 8 This is a schematic diagram illustrating a spring connection between a frame and a protective plate according to an exemplary embodiment.

[0041] Explanation of reference numerals in the attached figures

[0042] 1-Frame, 11-Storage slot, 2-Battery unit, 21-Pressure relief valve, 3-Protective plate, 4-Lifting device, 41-Mounting part, 42-Drive part, 43-Linking rod, 5-Sensor system, 51-Battery status monitoring sensor, 52-Pressure relief valve air pressure sensor, 53-Road condition image capture device, 54-Protective plate impact sensor, 55-Controller, 6-Cover plate, 7-Spring, 8-Connecting structure, 81-Bellow folding structure, 821-Roller, 822-Winding structure, 83-Scissor lift structure, 831-First rod, 832-Second rod, 84-Sliding connection structure. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0044] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0045] like Figures 1 to 8As shown, this exemplary embodiment of the present disclosure provides a battery pack. The battery pack includes a frame 1, a protective plate 3, and a lifting device 4. The frame 1 houses battery cells 2; the protective plate 3 is disposed at the bottom of the frame 1; and the lifting device 4 drives the protective plate 3 to move up or down to move away from or closer to the battery cells 2. The battery pack is typically located under the vehicle chassis. Depending on the design, a cooling plate or support plate may also be provided between the protective plate 3 and the battery cells 2 to support the battery cells 2. It should be noted that the battery cell 2 can be one or more battery cells, and the type of battery cell is not limited here; for example, it can be prismatic, cylindrical, or pouch-shaped.

[0046] The battery pack structure design needs to consider the requirements of different operating conditions. For example, thermal runaway from inside the battery pack or bottom impact from outside the battery pack. For instance, when a thermal runaway occurs in the battery pack, the drive protection plate 3 moves away from the battery cell 2, thus creating sufficient space between the battery cell 2 and the protection plate 3 for venting, preventing problems such as poor venting, the battery cell 2 burning the protection plate 3, and thermal runaway spreading to adjacent battery cells 2. It should be noted that this disclosure can be applied to battery packs where the cells vent downwards and a venting space is required between the battery cell 2 and the protection plate 3. Alternatively, for battery packs where the cells vent upwards, when venting space is needed under thermal runaway conditions, the battery cell 2 needs to descend with the protection plate 3 to create venting space above it. In this case, the high-voltage copper busbar, aluminum busbar, cold plate, etc., mechanically connected to the battery cell 2 all need to move downwards. For example, when there is an obstacle on the ground that may impact the protective plate 3, the protective plate 3 is driven to move away from the battery unit 2, or in other words, the protective plate 3 is driven to move closer to the obstacle. This allows the protective plate 3 to actively descend and offset the impact of the obstacle, thus protecting the battery unit 2 and preventing the obstacle from intruding into the battery pack and causing damage to the battery unit 2 and other internal components.

[0047] The mainstream solution in the current market adopts a passive protection approach, meaning that the mechanical structures related to protection are designed with a specified protection level in mind, and the overall structure is fixed during battery pack assembly. This passive protection takes into account the needs of various operating conditions during design, and the final solution is usually a relatively balanced solution that can meet the standards for various operating conditions simultaneously, rather than the optimal solution for a specific operating condition. Furthermore, in order to cope with some extreme operating conditions with extremely low probability of occurrence, the passive protection structure occupies a volume and weight that is quite redundant for normal operating conditions throughout the entire life cycle of the battery pack.

[0048] The battery pack disclosed herein employs an active protection method. In terms of improving protection effectiveness, unlike the passive, balanced but untargeted protection schemes in related technologies, in this disclosure, the lifting device 4 can drive the protective plate 3 to rise or fall away from or near the battery cell 2. During vehicle operation, when the battery pack faces different operating conditions, the lifting device can drive the protective plate to an appropriate position to address that condition, seeking a better protection solution under that condition, thereby improving the protection effect. Regarding improving volumetric packing efficiency, unlike the redundant passive protection schemes in related technologies, in this disclosure, whether under normal operating conditions or low-probability extreme conditions, the lifting device 4 can drive the protective plate 3 to achieve the purpose of protection, thus achieving a protection effect comparable to redundant passive protection structures while occupying less volume and weight.

[0049] In some embodiments, the battery pack further includes a sensor system 5 for acquiring operational safety information of the battery pack. The lifting device 4 is configured to drive the protective plate 3 based on the acquired operational safety information. Different operating conditions will generate different operational safety information. The sensor system 5 can acquire this operational safety information and drive the protective plate 3 to an appropriate position based on it to cope with different operating conditions faced by the battery pack. Here, the operational safety information of the battery pack refers to information that reflects adverse effects on the safe operation of the battery pack, including information reflecting operational safety from within the battery pack and information reflecting operational safety from outside the battery pack.

[0050] In some implementations, such as Figure 2 As shown, the sensor system 5 includes at least one of the following: a battery status monitoring sensor 51, a pressure relief valve pressure sensor 52, a road condition image capture device 53, and a guard plate impact sensor 54. These sensor systems 5 can be used individually or in combination to improve control accuracy by integrating the monitoring results.

[0051] Among them, the battery status monitoring sensor 51 is used to monitor and output parameters such as battery cell temperature, battery cell voltage and current, and remaining charge (SOC) in real time. The pressure relief valve pressure sensor 52 is used to monitor pressure changes near the battery cell pressure relief valve, indicating whether the battery cell is depressurized. For example, Figure 3 As shown, the pressure sensor 52 for the pressure relief valve can be positioned close to the area of ​​the pressure relief valve 21 to improve monitoring accuracy. Both the battery status monitoring sensor 51 and the pressure sensor 52 for the pressure relief valve can be implanted sensors.

[0052] The road condition image capture device 53 is used to monitor the road conditions ahead of the vehicle. For example, it can utilize sensors such as cameras and radar mounted on the vehicle body. After processing and identifying the images captured by the road condition image capture device 53, a prediction can be made as to whether there are obstacles on the road surface that could impact the protective plate. The road condition image capture device 53 can be positioned in front of the battery pack area to more accurately predict the road conditions that the battery pack will face. The protective plate impact sensor 54, for example, can use piezoelectric crystal material. Utilizing the piezoelectric effect, it converts external impact signals into electrical signals, thereby monitoring the location and magnitude of the energy impact on the protective plate 3.

[0053] In some embodiments, the battery pack also includes a controller 55. The controller 55 is connected to the lifting device 4 and the sensor system 5, respectively. The sensor system 5 can be connected to the controller 55 wirelessly via a physical signal cable or Bluetooth connection. It is worth noting that the controller 55 can be located inside the battery pack, or in other embodiments, it can be located outside the battery pack on the vehicle. It can function as a standalone controller or be integrated with other controllers, such as the BMU inside the pack and the vehicle controller outside the pack, as long as the system's response time is less than the time from entering the data acquisition area to actually reaching the battery pack area under the corresponding operating conditions. This disclosure does not impose any limitations on this.

[0054] In some implementations, such as Figure 4 and Figure 6 As shown, the lifting device 4 includes a mounting part 41 and a driving part 42. The mounting part 41 is mounted on the frame 1, and the driving part 42 is connected to the protective plate 3 and can drive the protective plate 3 to move. The mounting part 41 and the driving part 42 can be connected by a screw structure such as a sliding screw, ball screw, or hydrostatic screw, or by a piston structure similar to an air spring in an air suspension, or by an electromagnetic damping structure similar to an electromagnetic suspension and a loudspeaker. The driving force of the driving part 42 can be pneumatic, hydraulic, linear motor driven, electromagnetic driven, or purely mechanical spring return type. In addition, the lifting device 4 can be disposable or reusable. This disclosure does not limit this.

[0055] The frame 1 can be constructed into any suitable outline shape; for example, the frame 1 can be constructed as a rectangle. The rectangular structure of the frame 1 facilitates the arrangement of battery cells 2, reduces gaps between them, fully utilizes space, and increases the energy density of the battery pack. In some embodiments, the lifting device 4 can be located at the corner of the frame 1 and / or on the side beam of the frame 1, depending on factors such as the size of the battery pack and the internal design space of the vehicle body. Different arrangements of the lifting device 4 will be described exemplarily below. It should be noted that in the following description, front, back, left, and right are defined in terms of the vehicle itself; that is, the direction of the front of the vehicle is front, the direction of the rear of the vehicle is rear, and left and right are defined in terms of the direction from which the vehicle is viewed when the front is facing forward.

[0056] The lifting device 4 is positioned on the longitudinal centerline of the frame 1, and is symmetrically arranged about the longitudinal centerline of the frame 1. By positioning the lifting device 4 on or symmetrically about the longitudinal centerline of the frame 1, the stability of the lifting device 4 in driving the frame 1 can be improved, thereby enhancing the reliability of the protection for the battery unit 2.

[0057] In some embodiments, multiple lifting devices 4 are provided, and all multiple lifting devices 4 are located at the corner positions of the frame 1. For example, such as Figure 5a As shown, four lifting devices 4 are provided, positioned at the four corners of the frame 1. The four lifting devices 4 improve the control precision of the protective plate 3, and by controlling the descent height of the protective plate 3 at different positions, the protective plate 3 can be tilted left and right. This guides moving obstacles outwards after a collision, reducing the risk of secondary impacts caused by obstacles remaining in the area below the battery pack. In other embodiments, the lifting devices 4 may include one, two, three, or even more devices positioned at the corners of the frame 1, which will not be detailed in this disclosure.

[0058] In some embodiments, multiple lifting devices 4 are provided, and all of the multiple lifting devices 4 are arranged on the side beams of the frame 1. Specifically, only one lifting device 4 may be provided on one side beam, or at least two lifting devices 4 may be provided on one side beam. These will be described in detail below.

[0059] For a single edge beam, only one lifting device 4 can be installed. In some implementations, such as... Figure 5bAs shown, four lifting devices 4 are provided, with each of the four lifting devices 4 positioned at the center of one of the four side beams of the frame 1. In other embodiments, the lifting devices 4 may not be positioned at the center of the side beams. Furthermore, it should be noted that although the following embodiments are often described using the example of the lifting devices 4 being positioned at the center of the side beams, it should be understood that the lifting devices 4 are not limited to being positioned at the center of the side beams, and this will not be elaborated further.

[0060] In some implementations, such as Figure 5f As shown, there are three lifting devices 4. One of the three lifting devices 4 is located at the center of the front beam of the frame 1, and the other two lifting devices 4 are located between the center of the left beam and the right beam and the rear corner, respectively, or as shown in the diagram. Figure 5e As shown, one of the three lifting devices 4 is located at the center of the rear beam of the frame 1, and the other two lifting devices 4 are located between the center of the left beam and the right beam and the front corner, respectively.

[0061] In some implementations, such as Figure 5h As shown, there are two lifting devices 4, which are respectively located at the center of the front beam and the rear beam of the frame 1, or as shown in the figure. Figure 5i As shown, the two lifting devices 4 are respectively located at the center of the left and right beams of the frame 1.

[0062] In some embodiments, the lifting device 4 is installed on the front and rear beams of the frame 1, wherein the lifting device 4 is connected to the two corners at the front end of the frame 1 via connecting rods 43, and / or the lifting device 4 is connected to the two corners at the rear end of the frame 1 via connecting rods 43. For example, Figure 5h The embodiment shown includes two lifting devices 4, which are disposed on the front beam and the rear beam of the frame 1. The lifting devices 4 are connected to the two corners at the front end of the frame 1 via connecting rods 43, and / or the lifting devices 4 are connected to the two corners at the rear end of the frame 1 via connecting rods 43. This allows the lifting devices 4 to control the height of the two front corners and the two rear corners respectively, thereby achieving the tilting of the guard plate 3 in the left and right directions.

[0063] For at least one side beam, two lifting devices 4 are installed. In some embodiments, such as Figure 5c As shown, two of the four lifting devices 4 are spaced apart on the left beam of the frame 1, and the other two lifting devices 4 are spaced apart on the right beam of the frame 1.

[0064] In some embodiments, multiple lifting devices 4 are provided, with some of them located at the corners of the frame 1 and others located on the side beams of the frame 1. For example... Figure 5gAs shown, three lifting devices 4 are provided. One of the three lifting devices 4 is located at the center of the front beam of the frame 1, and the other two lifting devices 4 are located at the two corners of the rear end of the frame 1. In other embodiments, such as Figure 5d As shown, there are three lifting devices 4. One of the three lifting devices 4 is located at the center of the rear beam of the frame 1, and the other two lifting devices 4 are located between the center of the left beam and the right beam and the front corner, respectively.

[0065] In some implementations, such as Figure 5j As shown, the lifting device 4 includes one unit, which is disposed on one of the front beams or the rear beams of the frame 1. For example, it can be disposed at the center of the front beam or the rear beam. The other of the front beams or the rear beams is connected to the protective plate 3 via a pivot. In some other embodiments, the lifting device 4 is disposed on the rear beam of the frame 1, and the front beam is connected to the protective plate 3 via a pivot.

[0066] like Figure 4 and Figure 8 As shown, the battery pack provided in this disclosure may further include a spring 7 connected between the frame 1 and the protective plate 3. The spring 7 is configured to allow the protective plate 3 to move freely relative to the frame 1 within a predetermined range. Multiple springs 7 may be arranged along the side beams of the frame 1. The predetermined range of free up-and-down movement of the protective plate 3 is related to the spring constant of the spring 7. The free up-and-down movement of the protective plate 3 can "push away" a large amount of gravel, and when subjected to low-energy impacts, the protective plate 3 can move up and down within a certain range with the impact. This free up-and-down movement after impact can absorb some of the impact energy and reduce the deformation of the protective plate 3 after impact.

[0067] In some embodiments, the battery pack further includes a connecting structure 8, which is connected between the frame 1 and the protective plate 3. The connecting structure 8 is used to maintain the connection between the frame 1 and the protective plate 3 during the movement of the protective plate 3. That is, the connecting structure 8 serves to connect the frame 1 and the protective plate 3, preventing the protective plate 3 from completely detaching during the movement of the protective plate 3.

[0068] The connection structure 8 can take various forms. In some embodiments, the connection structure 8 is an extendable / retractable structure, wherein when the protective plate 3 is away from the battery cell 2, the extendable / retractable structure is in an extended state, and when the protective plate 3 is close to the battery cell 2, the extendable / retractable structure is in a retracted state. This extendable / retractable connection structure occupies less space in the retracted state, reducing the volume occupied by the battery pack and benefiting the overall vehicle space layout. In some embodiments, such as... Figure 7bAs shown, the frame 1 and / or protective plate 3 are provided with a storage groove 11 to avoid the expansion and contraction structure, which helps to further reduce the volume occupied by the battery pack. The expansion and contraction structure can be connected to the frame 1 and protective plate 3 by means of welding, bonding or other methods.

[0069] In some implementations, such as Figure 7a and Figure 7b As shown, the telescopic structure includes a pleated gusset structure 81, one end of which is connected to the frame 1, and the other end is connected to the protective plate 3. The pleated gusset structure 81 can be made of metal or composite material, for example. The pleated gusset structure 81 can be a one-piece design that wraps around the frame 1, or it can be a separate design that is spliced ​​together to wrap around the frame 1.

[0070] In some implementations, such as Figure 7c and 7d As shown, the extension and retraction structure includes a roller 821 and a winding structure 822 wound around the roller 821. The roller 821 is mounted on the frame 1. One end of the winding structure 822 is connected to the roller 821, and the other end is connected to the protective plate 3. The winding structure 822 can adopt a structure similar to a roller shutter or a coil spring structure. Similar to the accordion folding structure, the winding structure 822 can also be a one-piece design that wraps around the frame 1, or it can be a separate design that is spliced ​​together to wrap around the frame 1.

[0071] In some implementations, such as Figure 7e and Figure 7f As shown, the telescopic structure includes a scissor-lift structure 83, which comprises a first rod 831 and a second rod 832, hinged together. The first rod 831 is slidably connected to the protective plate 3. Figure 7g The scissor lift mechanism 83 is shown in the retracted position. Figure 7h The scissor lift structure 83 is shown in the extended position.

[0072] The connecting structure 8 may also include a sliding connecting structure 84, in some embodiments several, such as Figure 7i and 7j As shown, the sliding connection structure 84 includes a slide rail extending along the movement direction of the protective plate 3 and a slider slidably disposed in the slide rail. One of the slide rail and the slider is disposed on the frame 1, and the other is disposed on the protective plate 3. The slide rail enables vertical lifting without deformation of the parts themselves, resulting in a simple structure. Furthermore, other forms of sliding connections, such as roller and slide rail couplings or linkage-based sliding couplings, can also be applied in this disclosure, and will not be elaborated upon here.

[0073] According to a second aspect of the present disclosure, a vehicle is also provided, comprising the battery pack of any of the above-described embodiments, and having all of its beneficial effects.

[0074] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0075] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0076] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0077] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery pack, characterized by, include: The frame is used to house the battery cells; A protective panel is installed at the bottom of the frame. as well as A lifting device is used to drive the protective plate to move away from or closer to the battery cell.

2. The battery pack of claim 1, wherein, The lifting device includes a mounting part and a driving part, wherein the mounting part is disposed on the frame, and the driving part is connected to the protective plate and can drive the protective plate to move.

3. The battery pack of claim 1, wherein, The lifting device is located at the corner of the frame and / or on the side beam of the frame.

4. The battery pack of claim 3, wherein, The lifting device is located on the longitudinal center line of the frame, or the lifting device is symmetrically arranged about the longitudinal center line of the frame.

5. The battery pack of claim 4, wherein, Multiple lifting devices are provided, and all of the lifting devices are located at the corner positions of the frame.

6. The battery pack of claim 4, wherein, The lifting device is provided in multiple ways, and all of the lifting devices are provided on the side beams of the frame. There is only one lifting device on one side beam, or at least two lifting devices on one side beam.

7. The battery pack of claim 3, wherein, The lifting device is installed on the front beam and the rear beam of the frame. The lifting device is connected to the two corners at the front end of the frame via connecting rods, and / or the lifting device is connected to the two corners at the rear end of the frame via connecting rods.

8. The battery pack of claim 3, wherein, The lifting device is provided in multiple ways, with some of the lifting devices located at the corners of the frame and others located on the side beams of the frame.

9. The battery pack of claim 3, wherein, The lifting device includes one, which is mounted on one of the front beams or the rear beams of the frame, and the other of the front beams or the rear beams is connected to the protective plate via a pivot.

10. The battery pack of claim 1, wherein, The battery pack also includes a spring connected between the frame and the protective plate, the spring being configured to allow the protective plate to move freely relative to the frame within a predetermined range.

11. The battery pack of claim 10, wherein, Multiple springs are spaced apart along the side beams of the frame.

12. The battery pack according to claim 1, characterized in that, The battery pack also includes a connection structure connected between the frame and the protective plate, which is used to maintain the connection between the frame and the protective plate during the movement of the protective plate.

13. The battery pack of claim 12, wherein, The connection structure is an extension-contraction structure, wherein the extension-contraction structure is in an extended state when the protective plate is away from the battery cell, and in a contracted state when the protective plate is close to the battery cell.

14. The battery pack of claim 13, wherein, The frame and / or the protective plate are provided with a storage groove for avoiding the expansion and contraction structure.

15. The battery pack of claim 13, wherein, The stretch-contraction structure includes one of the following constructions: The telescopic structure includes an accordion fold structure, one end of which is connected to the frame and the other end of which is connected to the protective plate; The extension and retraction structure includes a roller and a winding structure wound on the roller. The roller is disposed on the frame, and one end of the winding structure is connected to the roller and the other end is connected to the protective plate. The telescopic structure includes a scissor lift structure, which includes a first rod and a second rod, the first rod and the second rod being hinged together, wherein the first rod is slidably connected to the protective plate.

16. The battery pack of claim 12, wherein, The connection structure includes a sliding connection structure.

17. The battery pack of claim 16, wherein, The sliding connection structure includes a slide rail extending along the movement direction of the protective plate and a slider slidably disposed in the slide rail, wherein one of the slide rail and the slider is disposed on the frame and the other is disposed on the protective plate.

18. The battery pack of claim 1, wherein, The battery pack further includes a sensor system for acquiring operational safety information of the battery pack, wherein the lifting device is configured to drive the protective plate based on the acquired operational safety information.

19. The battery pack of claim 18, wherein, The sensor system includes at least one of the following: a battery status monitoring sensor, a pressure relief valve pressure sensor, a road condition image capture device, and a protective plate impact sensor.

20. A vehicle, characterized in that, Includes the battery pack described in any one of claims 1-19.

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