Protection structure, battery assembly, detection device and vehicle

Abstract

The utility model discloses a protection structure, a battery assembly, a detection device and a vehicle. The protection structure comprises two protection bottom plates which are arranged in a spaced mode in the first direction, and the protection bottom plates are used for being connected with one side face of a protected piece. Each protective bottom plate is provided with a conductive layer, the two conductive layers are oppositely arranged, and an electrolyte is arranged between the two conductive layers; the two conductive layers are matched with the electrolyte to form a bottom plate capacitor; and the bottom plate capacitor is used for being electrically connected with a detection device, so that the detection device detects the capacitance value of the bottom plate capacitor. According to the protection structure, the bottom plate capacitors arranged in the two protection bottom plates are formed on one side of the protected part, when the protection bottom plates deform, the capacitance values of the inner bottom plate capacitors can be changed, and then a detection device can know that the two protection bottom plates are damaged according to the capacitance value changes; the problem that deformation damage of the protection structure cannot be automatically detected in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery protection, in particular to a protection structure, a battery assembly, a detection device and a vehicle. Background Art

[0002] Electric drive new energy is a popular direction in the current energy development. In some large equipment, such as vehicles, a battery assembly composed of battery packs is usually used to drive the equipment. In the battery assembly, a protection structure is usually arranged outside the battery pack to protect the battery pack and prevent it from being damaged when impacted.

[0003] In the current protection structure, there is a lack of a device structure for actively detecting impact damage. When an impact occurs, the equipment operator cannot timely understand the damaged condition of the battery assembly and take corresponding measures, which will pose a safety hazard. Summary of the Utility Model

[0004] Embodiments of the utility model provide a protection structure, a battery assembly, a detection device and a vehicle to solve the problem that the deformation damage of the protection structure cannot be autonomously detected in the prior art.

[0005] Embodiments of the utility model provide a protection structure, including two protection bottom plates arranged at intervals along a first direction, and the protection bottom plates are used to connect one side of a protected component;

[0006] Each of the protection bottom plates is provided with a conductive layer, the two conductive layers are arranged oppositely, and an electrolyte is arranged between the two conductive layers;

[0007] The two conductive layers and the electrolyte cooperate to form a bottom plate capacitor;

[0008] The bottom plate capacitor is used to be electrically connected to a detection device, so that the detection device detects the capacitance value of the bottom plate capacitor.

[0009] Preferably, the electrolyte is a flexible insulating electrolyte; or the electrolyte is air.

[0010] Preferably, the protection structure further includes an insulating structure;

[0011] The insulating structure covers the outside of the bottom plate capacitor.

[0012] Preferably, the protection bottom plate is an insulating bottom plate;

[0013] The insulating structure includes a first insulating layer, and one side surface of the first insulating layer is arranged oppositely to the peripheries of the two conductive layers.

[0014] Preferably, the insulating structure includes a second insulating layer and a third insulating layer. One side surface of the second insulating layer is disposed opposite to the peripheries of the two conductive layers;

[0015] The third insulating layer is disposed between the conductive layer and the protective bottom plate.

[0016] Preferably, the protection structure further includes a waterproof structure;

[0017] One side surface of the waterproof structure is disposed opposite to the peripheries of the two conductive layers.

[0018] An embodiment of the present invention further provides a battery assembly, including a battery pack and the above protection structure;

[0019] The protective bottom plate is connected to one side surface of the battery pack.

[0020] An embodiment of the present invention further provides a detection device for performing capacitance detection on the bottom plate capacitance of the above protection structure;

[0021] The detection device includes a capacitance detection unit;

[0022] The capacitance detection unit is electrically connected to the conductive layer in the bottom plate capacitance for detecting the capacitance value of the bottom plate capacitance.

[0023] Preferably, the capacitance detection unit includes two electrode leads;

[0024] Each electrode lead is connected to one conductive layer in the bottom plate capacitance.

[0025] Preferably, the detection device further includes a fault prompt unit;

[0026] The fault prompt unit is connected to the capacitance detection unit for performing fault prompt based on the capacitance value.

[0027] An embodiment of the present invention further provides a vehicle, including the above battery assembly and the above detection device;

[0028] The detection device is electrically connected to the conductive layer in the bottom plate capacitance for detecting the capacitance value of the bottom plate capacitance.

[0029] An embodiment of the present utility model provides a protection structure, a battery assembly, a detection device and a vehicle. By arranging two protection bottom plates, laying a conductive layer on the protection bottom plates and arranging an electrolyte between the conductive layers, a bottom plate capacitor arranged within the two protection bottom plates can be formed on one side of the protected component. When the protection bottom plates are deformed, the distance between the two conductive layers of the bottom plate capacitor will change, causing the capacitance value of the internal bottom plate capacitor to change. Furthermore, the detection device can know that the two protection bottom plates are damaged according to the change in the capacitance value, and then determine that the protected component connected thereto has a risk of damage, solving the problem in the prior art that the deformation damage of the protection structure cannot be detected independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 is a schematic structural diagram of a protection structure in an embodiment of the present utility model;

[0032] Figure 2 is another schematic structural diagram of a protection structure in an embodiment of the present utility model;

[0033] Figure 3 is a block diagram structural schematic diagram of a detection device in an embodiment of the present utility model.

[0034] In the figure: 1, protection bottom plate; 2, conductive layer; 3, electrolyte; 4, bottom plate capacitor; 5, detection device; 51, capacitance value detection unit; 511, electrode lead; 52, fault prompt unit; 6, insulation structure; 61, first insulation layer; 62, second insulation layer; 63, third insulation layer; 7, waterproof structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] An embodiment of the present utility model provides a protection structure, as Figure 1 shown. The protection structure includes two protection bottom plates 1 arranged at intervals along a first direction; the protection bottom plates 1 are used to connect one side surface of the protected part; each protection bottom plate 1 is provided with a conductive layer 2, the two conductive layers 2 are arranged oppositely, and an electrolyte 3 is arranged between the two conductive layers 2; the two conductive layers 2 and the electrolyte 3 cooperate to form a bottom plate capacitor 4; the bottom plate capacitor 4 is used to be electrically connected to a detection device 5, so that the detection device 5 detects the capacitance value of the bottom plate capacitor 4.

[0039] Among them, the first direction can be the up-down direction, such as the height direction of a vehicle, or the left-right direction, such as the length direction and width direction of a vehicle.

[0040] As an example, the protection structure includes two protection bottom plates 1. The protection bottom plates 1 are arranged at intervals along the first direction on one side of the protected part (such as a battery pack) to provide protection for the protected part. A conductive layer 2 is laid on each of the two protection bottom plates 1, and the conductive layer 2 can be a conductive metal coating laid on the protection bottom plate 1 by electroplating. The conductive layers 2 on the two protection bottom plates 1 are arranged face to face oppositely, so that the two conductive layers 2 can map each other. An electrolyte 3 is arranged in the gap between the two conductive layers 2, so that the conductive layer 2 and the electrolyte 3 cooperate to form a bottom plate capacitor 4. The bottom plate capacitor 4 has a capacitance value and can store charges after being energized. The capacitance value C of the bottom plate capacitor 4 is related to the distance between the two conductive layers 2 and the facing area of the two conductive layers 2. The specific calculation formula is C = ε rS / 4πkd, where ε r is the dielectric constant, S is the area of ​​the two conductive layers 2, k is the electrostatic force constant, and d is the distance between the two conductive layers 2. When the protective bottom plate 1 is deformed, the distance between the two conductive layers 2 of the bottom plate capacitor 4 will change, thereby causing the capacitance of the bottom plate capacitor 4 to change. The detection device 5 can know that the protective bottom plate 1 is damaged according to the capacitance change.

[0041] In this example, by providing two protective bottom plates 1, laying a conductive layer 2 on the protective bottom plates 1 and providing an electrolyte 3 between the conductive layers 2, a bottom plate capacitor 4 provided inside the two protective bottom plates 1 can be formed on one side of the protected component. When the protective bottom plate 1 is deformed, the distance between the two conductive layers 2 of the bottom plate capacitor 4 will change, causing the capacitance of the internal bottom plate capacitor 4 to change, and then the detection device 5 can know that the two protective bottom plates 1 are damaged according to the capacitance change, and then determine that the protected component connected thereto is at risk of damage.

[0042] In one embodiment, the electrolyte 3 is a flexible insulating electrolyte; or, the electrolyte 3 is air.

[0043] As an example, the electrolyte 3 must be a flexible and insulating electrolyte, such as an insulating plastic film. By filling the bottom plate capacitor 4 with a flexible electrolyte, when the protective bottom plate 1 is damaged and deformed, the distance between the two conductive layers 2 can be smoothly changed, making the protection more sensitive. Alternatively, direct air can be used as the electrolyte 3 of the bottom plate capacitor 4, which can also smoothly cause the distance between the two conductive layers 2 to change when the protective bottom plate 1 is damaged and deformed.

[0044] In one embodiment, the protection structure further includes an insulating structure 6 ; the insulating structure 6 is wrapped around the bottom plate capacitor 4 .

[0045] As an example, the protection structure further includes an insulating structure 6. The insulating structure 6 is coated outside the bottom plate capacitor 4 formed by the two conductive layers 2 and the electrolyte 3, and forms an insulating protection for the conductive layer 2 and the electrolyte 3 to prevent the conductive layer 2 or the electrolyte 3 from contacting an external conductive object and causing the bottom plate capacitor 4 to fail.

[0046] In one embodiment, if Figure 1 As shown, the protection base plate 1 is an insulating base plate; the insulating structure 6 includes a first insulating layer 61 , and one side surface of the first insulating layer 61 is arranged opposite to the periphery of the two conductive layers 2 .

[0047] As an example, the protective bottom plate 1 can be an insulating bottom plate made of an insulating material such as plastic. The conductive layer 2 is directly provided on the insulating bottom plate in the form of a coating. Using the insulating bottom plate as the protective bottom plate 1 can directly form an insulating structure 6 between the conductive layer 2 and the protective bottom plate 1, preventing the conductive layer 2 from contacting an external conductive object and causing the bottom plate capacitance 4 to fail. The insulating structure 6 further includes a first insulating layer 61, and the first insulating layer 61 covers the peripheries of the two conductive layers 2 and the electrolyte 3 and can abut against the outer edges of the two conductive layers 2. The first insulating layer 61 cooperates with the insulating bottom plate to form an insulating structure 6 that completely covers the conductive layer 2 and the electrolyte 3, providing insulating protection for the bottom plate capacitance 4.

[0048] In one embodiment, as Figure 2 shown, the insulating structure 6 includes a second insulating layer 62 and a third insulating layer 63. One side surface of the second insulating layer 62 is disposed opposite to the peripheries of the two conductive layers 2; the third insulating layer 63 is disposed between the conductive layer 2 and the protective bottom plate 1.

[0049] As an example, when the protective bottom plate 1 is made of a non-insulating material such as steel, the insulating structure 6 can further include a second insulating layer 62 and a third insulating layer 63. The second insulating layer 62 covers the peripheries of the two conductive layers 2 and the electrolyte 3 and can abut against the outer edges of the two conductive layers 2. The third insulating layer 63 is disposed between the protective bottom plate 1 and the conductive layer 2, isolating the protective bottom plate 1 and the conductive layer 2 from each other to prevent the conductive layer 2 from contacting the non-insulating protective bottom plate 1 and causing the bottom plate capacitance 4 to fail. The second insulating layer 62 and the third insulating layer 63 cooperate to form an insulating structure 6 that completely covers the conductive layer 2 and the electrolyte 3, providing insulating protection for the bottom plate capacitance 4.

[0050] In one embodiment, the protection structure further includes a waterproof structure 7; one side surface of the waterproof structure 7 is disposed opposite to the peripheries of the two conductive layers 2.

[0051] As an example, the protection structure further includes a waterproof structure 7. The waterproof structure 7 can be a waterproof film or the like, covering the peripheries of the two conductive layers 2 and the electrolyte 3 and can abut against the two conductive layers 2 and the electrolyte 3, forming a sealing structure that seals the electrolyte 3 within the waterproof structure 7 and the conductive layer 2, preventing external air, dust, moisture, etc. from entering the electrolyte 3 and causing a change in the dielectric constant and generating an error.

[0052] In one embodiment, at least two mounting holes are provided on the protective bottom plate 1; the mounting holes are used to assemble the protective bottom plate 1 on the first workpiece.

[0053] Wherein, the first workpiece is a workpiece for fixedly installing the protective bottom plate 1.

[0054] As an example, at least two mounting holes are further provided on the protection base plate 1. Specifically, four mounting holes can be provided at the four corners of the protection base plate 1, and the protection base plate 1 is fixed to the first workpiece through bolts inserted into the mounting holes.

[0055] An embodiment of the present utility model provides a battery assembly, which includes a battery pack and the protection structure in any one of the above embodiments; the protection base plate is connected to one side surface of the battery pack.

[0056] As an example, the battery assembly includes a battery pack and the protection structure in any one of the above examples. The protection structure can be provided at one side surface of the battery pack. For the impact generated on this side surface, for example, when the battery pack is arranged in a vehicle, the protection structure can be arranged below the battery pack along the vehicle height direction to perform corresponding protection on the battery pack. When the protection base plate 1 deforms, the distance between the two conductive layers 2 of the base plate capacitor 4 will change, which will cause the capacitance value of the internal base plate capacitor 4 to change. Furthermore, the detection device 5 can know that the protection structure is damaged according to the capacitance value change, solving the problem in the prior art that the deformation condition of the battery assembly cannot be actively detected.

[0057] An embodiment of the present utility model provides a detection device 5, as Figure 3 shown, the detection device 5 is used to perform capacitance detection on the base plate capacitor 4 of the protection structure in the above embodiment; the detection device 5 includes a capacitance detection unit 51; the capacitance detection unit 51 is electrically connected to the conductive layer 2 in the base plate capacitor 4 and is used to detect the capacitance value of the base plate capacitor 4.

[0058] As an example, the detection device 5 is used to be connected to the protection structure in the battery assembly to detect the battery assembly. The detection device 5 includes a capacitance detection unit 51. The capacitance detection unit 51 can be electrically connected to the conductive layer 2 in the protection structure to charge the base plate capacitor 4 formed by the conductive layer 2 and the electrolyte 3. The charged base plate capacitor 4 will generate a corresponding capacitance voltage according to the current capacitance value. When the protection base plate 1 deforms, the distance between the two conductive layers 2 of the base plate capacitor 4 will change, which will cause the capacitance value of the internal base plate capacitor 4 to change, and further cause the capacitance voltage of the base plate capacitor 4 to change. The capacitance detection unit 51 in the detection device 5 can calculate and obtain the current capacitance value of the base plate capacitor 4 according to the current capacitance voltage.

[0059] In this example, by detecting the capacitance value of the base plate capacitor 4 in the protection structure, the detection device 5 can know whether the protection structure is damaged according to the capacitance value change, solving the problem in the prior art that the deformation condition of the battery assembly cannot be actively detected.

[0060] In one embodiment, the capacitance detection unit 51 includes two electrode leads 511; each electrode lead 511 is connected to one of the conductive layers 2 in the bottom plate capacitor 4.

[0061] As an example, the capacitance detection unit 51 includes two electrode leads 511. Each electrode lead 511 is connected to the first conductive layer 2 in the bottom plate capacitor 4, and this electrode lead 511 is used to charge the bottom plate capacitor 4 so that the bottom plate capacitor 4 generates a corresponding capacitance voltage.

[0062] In one embodiment, the detection device 5 further includes a fault prompt unit 52; the fault prompt unit 52 is connected to the capacitance detection unit 51 and is used to perform fault prompting based on the capacitance value.

[0063] As an example, the detection device 5 may further include a fault prompt unit 52. The fault prompt unit 52 is electrically connected to the capacitance detection unit 51. The capacitance detection unit 51 can feedback the capacitance value in real time to the fault prompt unit 52, and the fault prompt unit 52 can perform fault prompting after the current capacitance value exceeds the preset threshold range.

[0064] The embodiment of the present utility model further provides a vehicle, including the battery assembly in the above embodiment and the detection device 5 in the above embodiment; the detection device 5 is electrically connected to the conductive layer 2 in the bottom plate capacitor 4 and is used to detect the capacitance value of the bottom plate capacitor 4.

[0065] As an example, the vehicle includes the battery assembly in the above example and the detection device 5 in the above embodiment. The detection device 5 is electrically connected to the conductive layer 2 in the bottom plate capacitor 4 and is used to detect the capacitance value of the bottom plate capacitor 4. In this example, by using the detection device 5 to detect the capacitance value of the bottom plate capacitor 4 provided on one side of the battery pack, it is possible to know whether the protection structure is damaged according to the change in the capacitance value, and the problem in the prior art that the deformation condition of the battery assembly cannot be actively detected is solved.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be included in the protection scope of the present utility model.

Claims

1. A protective structure, characterized in that: It comprises two protective bottom plates spaced apart along a first direction, and the protective bottom plates are used to connect a side surface of a protected component; A conductive layer is disposed on each of the protective bottom plates, the two conductive layers are disposed opposite to each other, and an electrolyte is disposed between the two conductive layers; The two conductive layers cooperate with the electrolyte to form a bottom plate capacitor; The bottom plate capacitor is used to be electrically connected to a detection device so that the detection device detects the capacitance value of the bottom plate capacitor.

2. The protective structure according to claim 1, characterized in that: The electrolyte is a flexible insulating electrolyte; or, the electrolyte is air.

3. The protective structure according to claim 1, characterized in that: The protection structure also includes an insulating structure; The insulating structure is wrapped around the bottom plate capacitor.

4. The protective structure according to claim 3, characterized in that: The protective base plate is an insulating base plate; The insulating structure comprises a first insulating layer, a side surface of which is arranged opposite to the peripheries of the two conductive layers.

5. The protective structure according to claim 3, characterized in that: The insulating structure comprises a second insulating layer and a third insulating layer, wherein a side surface of the second insulating layer is arranged opposite to the peripheries of the two conductive layers; The third insulating layer is disposed between the conductive layer and the protective base plate.

6. The protective structure according to claim 1, characterized in that: The protection structure also includes a waterproof structure; One side surface of the waterproof structure is arranged opposite to the peripheries of the two conductive layers.

7. A battery assembly, characterized in that: Comprising a battery pack and the protective structure according to any one of claims 1 to 6; The protective bottom plate is connected to a side surface of the battery pack.

8. A detection device, characterized in that: Used to perform capacitance detection on the bottom plate capacitance of the protection structure according to any one of claims 1 to 6; The detection device comprises a capacitance detection unit; The capacitance detection unit is electrically connected to the conductive layer in the bottom plate capacitor and is used to detect the capacitance value of the bottom plate capacitor.

9. The detection device according to claim 8, characterized in that: The capacitance detection unit includes two electrode leads; Each of the electrode leads is connected to a conductive layer in the bottom plate capacitor.

10. The detection device according to claim 8, characterized in that: The detection device also includes a fault prompt unit; The fault prompt unit is connected to the capacitance detection unit and is used for providing a fault prompt based on the capacitance value.

11. A vehicle, characterized in that: Comprising the battery assembly according to claim 7 and the detection device according to any one of claims 8 to 10; The detection device is electrically connected to the conductive layer in the bottom plate capacitor and is used to detect the capacitance value of the bottom plate capacitor.

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