Battery pack bottom protection structure, battery pack protection device and electric equipment

Abstract

The utility model belongs to the technical field of battery packs, and particularly relates to a battery pack bottom protection structure, a battery pack protection device and electric equipment. The battery pack bottom protection structure comprises a protection plate and at least one light detection element, the protection plate is suitable for being mounted at the bottom of the battery pack, so that a closed cavity is defined by the protection plate and the bottom of the battery pack; the light detection element is arranged in the cavity and used for detecting light changes in the cavity, and the light changes are used for representing whether the protection plate is damaged or not. When the protection plate is damaged, an exposure point is formed at the damaged part, external light enters the cavity through the exposure point, and the light detection element in the cavity can detect the change of the light, so that the damage of the protection plate is detected.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a battery pack bottom protection structure, a battery pack protection device and electrical equipment. Background Art

[0002] As the power unit of the vehicle, the battery pack is a key component of the vehicle. The battery pack is generally installed at the bottom of the vehicle body. The vehicle body is provided with a protective plate at the bottom of the battery pack to protect the battery pack. In the related technology, when the protective plate is broken due to collision, it is impossible to detect the breakage immediately to repair or replace the protective plate. Moreover, when the protective plate is broken, there is a risk of water ingress to the battery pack. Utility Model Content

[0003] The technical problem to be solved by the present invention is: in view of the problem in the related art that when a protective plate is broken due to collision, the rupture cannot be detected immediately, a battery pack bottom protection structure, a battery pack protection device and electrical equipment are provided.

[0004] To solve the above technical problems, on the one hand, the embodiment of the utility model provides a battery pack bottom protection structure, including a protection plate and at least one light detection element;

[0005] The protective plate is suitable for being installed at the bottom of the battery pack to enclose the bottom of the battery pack to form a closed cavity;

[0006] The light detection element is arranged in the cavity, and is used to detect light changes in the cavity, and the light changes are used to indicate whether the protective plate is damaged.

[0007] Optionally, the protective plate is a shading member.

[0008] Optionally, the light detection element is a photosensor and / or a camera.

[0009] Optionally, the light detection element is adapted to be fixed on the bottom of the battery pack.

[0010] Optionally, the protective plate includes a plate body and a fitting edge formed by bending the outer peripheral edge of the plate body, the fitting edge is suitable for being attached to the bottom of the battery pack, and the plate body and the bottom of the battery pack enclose the cavity.

[0011] Optionally, it also includes a plurality of reinforcing ribs, which are arranged on a side of the protective plate close to the light detection element, and the plurality of reinforcing ribs divide the cavity into a plurality of detection areas. A plurality of light detection elements are provided, and the plurality of light detection elements correspond one-to-one to the plurality of detection areas. Each light detection element is used to detect light changes in the corresponding detection area.

[0012] Optionally, it also includes a plurality of reinforcing ribs, which are arranged on a side of the protective plate close to the light detection element, and the plurality of reinforcing ribs divide the cavity into a plurality of detection areas. Only one light detection element is arranged, and the plurality of reinforcing ribs are spaced apart and distributed around a position on the protective plate opposite to the light detection element, and the reinforcing ribs extend radiating outward from the light detection element.

[0013] Optionally, the light detection element is arranged opposite to the center of the protective plate, and the plurality of reinforcing ribs are symmetrically arranged about the center of the protective plate.

[0014] On the other hand, an embodiment of the utility model provides a battery pack protection device, including an alarm unit and the above-mentioned battery pack bottom protection structure, the light detection element is connected to the alarm unit signal, and the alarm unit is used to alarm when the light detection element detects a light change in the cavity.

[0015] Optionally, a fill light is further included, which is installed on a side of the protective plate facing away from the light detection element, and is used for filling light when the brightness value of the external environment is lower than a preset value.

[0016] On the other hand, an embodiment of the utility model provides an electrical device, including a battery pack and the above-mentioned battery pack bottom protection structure or the above-mentioned battery pack protection device.

[0017] In the battery pack bottom protection structure of the utility model, the protection plate installed at the bottom of the battery pack and the battery pack form a closed cavity. When the protection plate is damaged, an exposure point is formed at the damaged part. External light enters the cavity through the exposure point. The light detection element in the cavity can detect the light change, thereby detecting the damage of the protection plate. In the battery pack bottom protection structure of the utility model, the light detection element uses light to detect the damage of the protection plate. It has a simple structure, uses fewer components, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a working principle diagram of a battery pack protection device provided by an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the bottom protection structure of the battery pack.

[0020] The reference numerals in the specification are as follows:

[0021] 1. Protective plate; 11. Plate body; 12. Fitting edge; 13. Reinforcing ribs; 14. Cavity; 2. Light detection element; 3. Battery pack; 4. Battery management system; 5. Vehicle controller; 6. Fill light. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] like Figure 1 As shown, an embodiment of the utility model provides a battery pack protection device, including an alarm unit and a battery pack bottom protection structure, the battery pack bottom protection structure includes a protection plate 1 and at least one light detection element 2, and the light detection element 2 is connected to the alarm unit signal.

[0024] like Figure 2 As shown, the protective plate 1 is installed at the bottom of the battery pack 3 to enclose the bottom of the battery pack 3 to form a closed cavity 14. The light detection element 2 is set in the cavity 14 to detect light changes in the cavity 14. The light changes are used to indicate whether the protective plate 1 is damaged. The alarm unit is used to alarm when the light detection element 2 detects light changes in the cavity 14.

[0025] Specifically, the protective plate 1 is generally a steel plate, which has a certain light shielding effect. When the protective plate 1 is intact, the protective plate 1 blocks external light from entering the cavity 14. When the bottom protection of the battery pack 3 is bumped and the protective plate 1 is damaged, an exposure point is formed at the damaged part, and external light enters the cavity 14 through the exposure point. The light detection element 2 in the cavity 14 can detect the light change and detect that the protective plate 1 is damaged.

[0026] Then, the alarm unit sends out an alarm message after receiving the information from the light detection element 2 , so that the driver can actively repair or replace the protective plate 1 .

[0027] In the battery pack protection device of the present invention, the protective plate 1 installed at the bottom of the battery pack 3 forms a closed cavity 14 with the battery pack 3. When the protective plate 1 is damaged, an exposure point is formed at the damaged part, and external light enters the cavity 14 through the exposure point. The light detection element 2 in the cavity 14 can detect the light change to detect the damage of the protective plate 1. After receiving the information from the light detection element 2, the alarm unit sends an alarm message to remind the driver that the protective plate 1 is damaged. Moreover, in the battery pack protection device of the present invention, the light detection element 2 uses light to detect the damage of the protective plate 1, has a simple structure, uses fewer components, and has a low cost.

[0028] In one embodiment, the protective plate 1 is a shading member, so that external light cannot enter the cavity 14, so that the light in the cavity 14 changes significantly after the protective plate 1 is damaged, which is conducive to the light detection element 2 detecting the light change and improving the detection accuracy.

[0029] In one embodiment, the light detection element 2 is a photosensitive sensor, which is a common product on the market, and the specific structure and principle are not described in detail here. After the external light enters the cavity 14, the photosensitive sensor senses the change of the light, and the resistance voltage changes. After the alarm unit receives the change information of the resistance voltage, it sends out an alarm message.

[0030] In other embodiments, the light detection element 2 may be a camera, which may take pictures of the protective plate 1 at a certain frequency, and compare the pictures with pictures of the standard protective plate 1 to confirm whether the protective plate 1 is damaged. Compared with the resistance voltage change of the photosensitive sensor, the pictures taken at different brightness have a more obvious contrast and a higher detection accuracy.

[0031] However, the number of components in a camera is greater than that of a sensor, and the camera is larger in size and consumes more power. Therefore, it is necessary to reasonably set the camera's shooting frequency. In actual use, the camera's shooting frequency can also be adjusted according to demand.

[0032] In other embodiments, two light detection elements 2 may be provided, one of which is a photosensitive sensor and the other is a camera, the camera is connected to the photosensitive sensor, and the camera is used to take pictures when the photosensitive sensor detects a light change. The camera is used in combination with the photosensitive sensor, and the camera can take pictures of the protective plate 1 after the photosensitive sensor detects a light change to confirm whether the protective plate 1 is damaged, making the detection more accurate and reducing misjudgment, while also reducing the working time of the camera and the power consumption of the camera.

[0033] In one embodiment, if Figure 1 As shown, the light detection element 2 is fixed to the bottom of the battery pack 3. Compared with the case where the light detection element 2 is fixed to the protective plate 1 through a bracket, and the bracket and the light detection element 2 need to be removed from the protective plate 1 when the protective plate 1 is repaired or replaced, in this design, since the light detection element 2 is fixed to the bottom of the battery pack 3, when the protective plate 1 is repaired or replaced, it is only necessary to remove the protective plate 1 from the bottom of the battery pack 3, without moving or disassembling the light detection element 2, fewer parts are required for disassembly and assembly, and the efficiency is higher, which facilitates the replacement of the protective plate 1.

[0034] In one embodiment, the light detection element 2 is glued to the bottom of the battery pack 3. Of course, the light detection element 2 can also be connected to the bottom of the battery pack 3 by a threaded fastener.

[0035] In one embodiment, if Figure 2As shown, the protective plate 1 includes a plate body 11 and a fitting edge 12 formed by bending the outer peripheral edge of the plate body 11. The fitting edge 12 is suitable for being attached to the bottom of the battery pack 3. The plate body 11 and the bottom of the battery pack 3 enclose a cavity 14. The contact surface between the fitting edge 12 and the bottom of the battery pack 3 is large, which can better block external light from entering the cavity 14 through the gap between the protective plate 1 and the battery pack 3, improve the light shielding effect of the protective plate 1, and increase the brightness difference between the inside and outside of the cavity 14. Therefore, after the protective plate 1 is damaged, the light in the cavity 14 changes significantly, which is conducive to the light detection element 2 detecting the light change and improving the detection accuracy.

[0036] In one embodiment, the outer peripheral edge of the plate body 11 is bent outward to form a fitting edge 12 .

[0037] In one embodiment, the plate body 11 protrudes toward a side away from the light detecting element 2 .

[0038] In one embodiment, the plate body 11 is a curved structure, and the plate body 11 gradually bulges outward from the edge to the center.

[0039] In one embodiment, the fitting edge 12 is glued to the bottom of the battery pack 3 to facilitate replacement of the protective plate 1. Of course, the fitting edge 12 can also be connected to the bottom of the battery pack 3 by threaded fasteners.

[0040] In one embodiment, the protective plate 1 is made of high-strength material and can be manufactured by injection molding, die-casting, stamping and other processes to prevent knocks and stone impacts.

[0041] In one embodiment, if Figure 2 As shown, the bottom protection structure of the battery pack also includes a plurality of reinforcing ribs. The plurality of reinforcing ribs 13 are arranged on the side of the protective plate 1 close to the light detection element 2 and against the bottom surface of the battery pack 3. The plurality of reinforcing ribs 13 divide the cavity 14 into a plurality of detection areas and improve the structural strength of the protective plate 1. Only one light detection element 2 is provided, and the plurality of reinforcing ribs 13 are distributed around the position on the protective plate 1 opposite to the light detection element 2. The reinforcing ribs 13 radiate outward from the light detection element 2 to divide the cavity 14 into a plurality of fan-shaped detection areas to prevent the reinforcing ribs 13 from blocking the path of light from each detection area to the light detection element 2, so that when any part of the protective plate 1 is damaged, the light detection element 2 can receive the light entering from the damaged part, so as to reduce the number of light detection elements 2 and improve the detection accuracy of the light detection element 2.

[0042] In one embodiment, the light detection element 2 is arranged opposite to the center of the protective plate 1, and a plurality of reinforcing ribs 13 are symmetrically arranged about the center of the protective plate 1, so that the areas of the various detection areas are as similar as possible, and the maximum paths from the various detection areas to the light detection element 2 are as close as possible.

[0043] In one embodiment, one end of the reinforcing rib 13 is connected to the connection between the plate body 11 and the fitting edge 12 , and the other end is spaced apart from the center of the plate body 11 .

[0044] In other embodiments, Figure 2 As shown, the bottom protection structure of the battery pack also includes a plurality of reinforcing ribs 13, and the plurality of reinforcing ribs 13 are arranged on one side of the protective plate 1 close to the light detection element 2, and the plurality of reinforcing ribs 13 divide the cavity 14 into a plurality of detection areas. A plurality of light detection elements 2 may be provided, and the plurality of light detection elements 2 correspond to the plurality of detection areas one by one, and each light detection element 2 is used to detect light changes in the corresponding detection area. The plurality of reinforcing ribs 13 divide the entire cavity 14 into a plurality of small-area detection areas to reduce the detection area range of each light detection element 2, thereby reducing the distance from the exposure point in each detection area to the light detection element 2, which is beneficial for the light detection element 2 to receive the light entering from the exposure point, improve the detection accuracy, and reduce misjudgment.

[0045] In one embodiment, the longitudinal cross-section of the reinforcing rib 13 is rectangular.

[0046] In one embodiment, the alarm unit includes an alarm, which is connected to the light detection element 2. In one embodiment, the alarm unit also includes a display unit, which is connected to the light detection element 2. When the protective plate 1 is damaged, the display unit displays a damaged picture of the protective plate 1, damage percentage information, and prompts the owner to report insurance and go to a 4S store for repair.

[0047] In one embodiment, if Figure 1 The figure also includes a fill light 6, which is installed on the side of the protective plate 1 facing away from the light detection element 2. The fill light 6 is used to provide fill light when the brightness value of the external environment is lower than a preset value.

[0048] Specifically, when the brightness value of the external environment is lower than the preset value, even if the protective plate 1 is damaged, since there is no light or the light is weak outside, no external light enters the cavity 14, and the light detection element 2 cannot detect the light change in the cavity 14, and thus cannot detect the damage of the protective plate 1. Therefore, it is necessary to use the fill light 6 to increase the brightness outside the protective plate 1, so that when the protective plate 1 is damaged, the light of the fill light 6 can enter the cavity 14 to trigger the light detection element 2 to detect the light change in the cavity 14, thereby detecting the damage of the protective plate 1, and further improving the timeliness and accuracy of the light detection element 2. Under normal use conditions, during the day or at night when the light of the electrical equipment itself is turned on, the brightness value of the external environment is higher than the preset value. When the protective plate 1 is damaged, the external light can enter the cavity 14, so that the light detection element 2 can detect the light change in the cavity 14 and detect the damage of the protective plate 1 in time. At this time, there is no need to turn on the fill light 6.

[0049] It should be noted that the fill light 6 can be arranged at the bottom of the vehicle body.

[0050] In one embodiment, a vehicle controller 5 is further included, the light detection element 2 is connected to the vehicle controller 5 by signal, and the alarm unit is connected to the vehicle controller 5 by signal. Compared with separately setting a component for processing the information of the light detection element 2, this design makes the bottom protection structure of the battery pack more integrated with the vehicle, reducing the number of components.

[0051] In one embodiment, a control module is usually provided in the fill light 6, and the control module controls the turning on and off of the fill light 6. The control module can be integrated into the vehicle controller 5, so that the vehicle controller 5 can use the sensor to detect the brightness value in the external environment, and control the fill light 6 to turn on when the brightness value of the external environment is lower than the preset value.

[0052] In one embodiment, the battery management system 4 (BMS for short) of the battery pack 3 is connected to the light detection element 2 by signal, and the battery management system 4 is connected to the vehicle controller 5 by signal. After the light detection element 2 detects the light, it transmits the information to the battery management system 4, and the battery management system 4 transmits the information to the vehicle controller 5.

[0053] In other embodiments, the light detecting element 2 may be fixed in the cavity 14 by a bracket. Specifically, the top end of the bracket supports the light detecting element 2 , and the bottom end of the bracket is fixed on the protective plate 1 .

[0054] In other embodiments, the reinforcing rib 13 may be disposed on a side of the protective plate 1 facing away from the light detecting element 2 .

[0055] In other embodiments, two or more light detection elements 2 may be provided, and the distribution of the reinforcing ribs 13 needs to be adjusted according to the positions of the light detection elements 2, so as to prevent the reinforcing ribs 13 from blocking the light detection elements 2 from receiving the light entering from the damaged part of the protective plate 1. For example, when nine light detection elements 2 are provided, the reinforcing ribs 13 may be distributed in a nine-square grid pattern on the board body 11, so as to divide the board body 11 into nine detection areas, and the nine light detection elements 2 are respectively installed in the nine detection areas in a one-to-one correspondence.

[0056] In other embodiments, the cavity 14 may be a structure of equal depth.

[0057] In addition, an embodiment of the utility model provides a battery pack bottom protection structure, which has the same structure as the battery pack bottom protection structure in any of the above embodiments. The protective plate 1 of the battery pack bottom protection structure is suitable for being installed at the bottom of the battery pack 3. When the protective plate 1 is damaged and external light enters the cavity 14 through the damaged portion, the light detection element 2 in the cavity 14 detects the light change, thereby detecting that the protective plate 1 is damaged.

[0058] In addition, an embodiment of the utility model provides an electrical device, including a battery pack 3 and a battery pack bottom protection structure or a battery pack protection device of the above embodiment. The electrical device includes but is not limited to vehicles, energy storage equipment, etc.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The bottom protection structure of the battery pack is characterized by: It comprises a protective plate (1) and at least one light detection element (2); The protective plate (1) is suitable for being installed at the bottom of the battery pack (3) so as to enclose the bottom of the battery pack (3) to form a closed cavity (14); The light detection element (2) is arranged in the cavity (14) and is used to detect light changes in the cavity (14), and the light changes are used to indicate whether the protective plate (1) is damaged.

2. The battery pack bottom protection structure according to claim 1, characterized in that: The protective plate (1) is a light shielding member.

3. The battery pack bottom protection structure according to claim 1, characterized in that: The light detection element (2) is a photosensor and / or a camera.

4. The battery pack bottom protection structure according to any one of claims 1 to 3, characterized in that: The light detection element (2) is suitable for being fixed on the bottom of the battery pack (3).

5. The battery pack bottom protection structure according to any one of claims 1 to 3, characterized in that: The protective plate (1) comprises a plate body (11) and a fitting edge (12) formed by bending the outer peripheral edge of the plate body (11), wherein the fitting edge (12) is suitable for being attached to the bottom of the battery pack (3), and the plate body (11) and the bottom of the battery pack (3) enclose the cavity (14).

6. The battery pack bottom protection structure according to any one of claims 1 to 3, characterized in that: It also includes a plurality of reinforcing ribs (13), which are arranged on a side of the protective plate (1) close to the light detection element (2), and the plurality of reinforcing ribs (13) divide the cavity (14) into a plurality of detection areas. The light detection element (2) is provided in plurality, and the plurality of light detection elements (2) correspond one-to-one to the plurality of detection areas. Each of the light detection elements (2) is used to detect light changes in the corresponding detection area.

7. The battery pack bottom protection structure according to any one of claims 1 to 3, characterized in that: It also includes a plurality of reinforcing ribs (13), which are arranged on a side of the protective plate (1) close to the light detection element (2), and the plurality of reinforcing ribs (13) divide the cavity (14) into a plurality of detection areas. Only one light detection element (2) is provided, and the plurality of reinforcing ribs (13) are distributed at intervals around a position on the protective plate (1) opposite to the light detection element (2), and the reinforcing ribs (13) extend radiating outward from the light detection element (2).

8. The battery pack bottom protection structure according to claim 7, characterized in that: The light detection element (2) is arranged opposite to the center of the protective plate (1), and the plurality of reinforcing ribs (13) are arranged symmetrically about the center of the protective plate (1).

9. A battery pack protection device, characterized in that: It comprises an alarm unit and a battery pack bottom protection structure as described in any one of claims 1 to 8, wherein the light detection element (2) is connected to the alarm unit signal, and the alarm unit is used to alarm when the light detection element (2) detects a light change in the cavity (14).

10. The battery pack protection device according to claim 9, characterized in that: It also comprises a fill light (6), which is mounted on a side of the protective plate (1) facing away from the light detection element (2), and is used for providing fill light when the brightness value of the external environment is lower than a preset value.

11. Electrical equipment, characterized in that: It comprises a battery pack (3) and a battery pack bottom protection structure as claimed in any one of claims 1 to 8 or a battery pack protection device as claimed in any one of claims 9 to 10.

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