Protective plate, battery system and electric equipment

Abstract

The utility model provides a protection plate, a battery system and electric equipment, and relates to the technical field of batteries, a first protection layer of the protection plate is connected with one side, facing a battery pack or a vehicle body, of a conductive protection layer, and a conductive structure is suitable for electrically connecting the conductive protection layer with the battery pack or the vehicle body, so that the conductive protection layer is in equipotential electric connection with the battery pack or the vehicle body. According to the protection plate provided by the embodiment of the invention, equipotential connection between the battery pack or the vehicle body and the protection plate can be realized, static electricity on the protection plate is eliminated, the problem of spark discharge caused by the static electricity on the protection plate is avoided, the use safety of a battery system can be improved, and the use safety of electric equipment can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a protective plate, a battery system, and electrical equipment. Background Art

[0002] The protective plate can protect the battery pack and reduce damage to the battery pack. In related art, static electricity generated by vibration and friction between the protective plate and the battery pack cannot be discharged, which can easily cause spark discharges, affecting the safety of the battery system and the use of electrical equipment. Utility Model Content

[0003] The embodiments of the present application provide a protective plate, a battery system, and an electrical device, which are used to solve the technical problem in the above-mentioned related technologies that the static electricity generated by the vibration and friction between the protective plate and the battery pack cannot be discharged, which easily causes spark discharge, affects the safe use of the battery system, and affects the safe use of the electrical equipment.

[0004] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0005] The first aspect of the embodiments of the present application provides a

[0006] A protective plate, characterized by comprising:

[0007] Conductive protective layer;

[0008] a first protective layer connected to a side of the conductive protective layer facing the battery pack or the vehicle body;

[0009] The conductive structure is suitable for electrically connecting the conductive protective layer to the battery pack or the vehicle body.

[0010] An embodiment of the present application provides a protective plate, a battery system, and electrical equipment. The protective plate is provided with a first protective layer on the conductive protective layer. The first protective layer is used to abut against the battery pack or the vehicle body on the side facing away from the conductive protective layer to achieve the effect of buffering and energy absorption.

[0011] Furthermore, by making the first protective layer directly contact with the conductive protective layer, the static electricity generated by the friction between the first protective layer and the battery pack or the vehicle body can be collected on the conductive protective layer, and then by electrically connecting one end of the conductive structure to the conductive protective layer and the other end to the battery pack or the vehicle body, the static electricity collected on the conductive protective layer can be transferred to the battery pack or the vehicle body, so that the battery pack or the vehicle body and the protective plate are connected at the same potential, and the static electricity on the protective plate is eliminated, thereby avoiding the problem of spark discharge caused by static electricity on the protective plate, and can improve the safety of battery system use and the safety of electrical equipment use.

[0012] In a possible implementation, the protective plate further includes a second protective layer disposed on a side of the conductive protective layer facing away from the first protective layer.

[0013] In this way, the second protective layer protects the side of the conductive protective layer facing away from the battery pack or the vehicle body, reducing the chance of scratches on the conductive protective layer and increasing its service life. Furthermore, the protective plate composed of the second protective layer, the conductive protective layer, and the first protective layer can be electrically connected to the battery pack or the vehicle body at the same potential, eliminating static electricity on the protective plate and preventing spark discharges caused by static electricity on the protective plate.

[0014] In a possible implementation, the protective plate further includes a third protective layer, which is disposed on a side of the conductive protective layer facing away from the second protective layer;

[0015] The third protective layer has a hollow portion so that part of the conductive protective layer is exposed;

[0016] The first protective layer is arranged on the conductive protective layer corresponding to the hollow portion.

[0017] In this way, by providing a second protective plate, the side of the conductive protective layer facing the battery pack can be protected, reducing the chance of scratches and damage to the conductive protective layer, and further increasing the service life of the conductive protective layer. Furthermore, by directly providing the third protective layer on the conductive protective layer and providing a hollow portion in the third protective layer, so that the first protective layer is in direct contact with the conductive protective layer exposed at the hollow portion, the protective plate composed of the second protective layer, the third protective layer, the conductive protective layer, and the first protective layer can be electrically connected to the battery pack or vehicle body at the same potential, eliminating static electricity on the protective plate and avoiding spark discharge caused by static electricity on the protective plate.

[0018] In a possible implementation, in the thickness direction of the conductive protective layer, the orthographic projection of the inner edge of the hollow portion is located within the orthographic projection of the conductive protective layer.

[0019] In this way, by making the positive projection of the inner edge of the hollow part located within the surface of the conductive protective layer in the thickness direction of the conductive protective layer, the coverage area of ​​the hollow part can be made smaller than the surface area of ​​the conductive protective layer, so that the solid part of the third protective layer other than the hollow part can be covered on the conductive protective layer, so that the conductive protective layer can be fixed by the solid part of the third protective layer, thereby improving the structural stability of the protective plate.

[0020] In a possible implementation, in the thickness direction of the conductive protective layer, a ratio of an orthographic projection area of ​​the first protective layer to an orthographic projection area of ​​the exposed conductive protective layer is greater than or equal to 0.1 and less than or equal to 1.

[0021] In this way, by making the ratio of the orthographic projection area of ​​the first protective layer to the orthographic projection area of ​​the exposed conductive protective layer greater than or equal to 0.1 and less than or equal to 1, it is possible to avoid the area of ​​the first protective layer being too small due to a small ratio, thereby resulting in a lower buffering effect of the first protective layer and affecting the impact resistance of the protective plate.

[0022] In a possible implementation, in a thickness direction of the conductive protective layer, an outer contour area of ​​an orthographic projection of the conductive protective layer is equal to an outer contour area of ​​an orthographic projection of the second protective layer.

[0023] In this way, by making the outer contour area of ​​the orthographic projection of the conductive protective layer equal to the outer contour area of ​​the orthographic projection of the second protective layer, the problem of the second protective layer being unable to completely cover the conductive protective layer due to the conductive protective layer being too large, thereby reducing the protective effect of the second protective layer on the conductive protective layer, can be avoided.

[0024] In a possible implementation, in a thickness direction of the conductive protective layer, an outer contour area of ​​an orthographic projection of the conductive protective layer is smaller than an outer contour area of ​​an orthographic projection of the second protective layer.

[0025] In this way, by making the outer contour area of ​​the orthographic projection of the conductive protective layer smaller than the outer contour area of ​​the orthographic projection of the second protective layer, the second protective layer can completely cover the conductive protective layer, thereby improving the protective effect of the second protective layer on the conductive protective layer and avoiding scratches on the surface of the conductive protective layer in the thickness direction.

[0026] In a possible implementation, the protective plate further includes a fourth protective layer;

[0027] The fourth protective layer is disposed between the third protective layer and the second protective layer, and the fourth protective layer surrounds the outer contour of the conductive protective layer.

[0028] In this way, in the thickness direction of the conductive protective layer, when the orthographic projection of the conductive protective layer is located within the orthographic projection of the second protective layer, by arranging the fourth protective layer on the outer peripheral side of the conductive protective layer, the fourth protective layer can fill the gap formed between the second protective layer and the third protective layer, thereby avoiding the problem of the outer edges of the second protective layer and the third protective layer being damaged by impact due to lack of support, thereby improving the durability of the second protective layer and the third protective layer, and improving the durability of the protective plate.

[0029] In a possible implementation, in a thickness direction of the conductive protective layer, the thickness of the fourth protective layer is equal to the thickness of the conductive protective layer.

[0030] In this way, by making the thickness of the fourth protective layer the same as the thickness of the conductive protective layer, the flatness of the surface of the conductive protective layer and the fourth protective layer can be improved, the fit between the second protective layer and the surface of the conductive protective layer and the fourth protective layer can be improved, and the fit between the third protective layer and the surface of the conductive protective layer and the fourth protective layer can be improved.

[0031] In a possible implementation, there are multiple conductive protective layers, and the multiple conductive protective layers are arranged at intervals on the surface of the second protective layer, and the conductive protective layers are electrically connected;

[0032] The hollow portion exposes at least a portion of one of the conductive protective layers;

[0033] The conductive structure is electrically connected to at least one of the conductive protection layers.

[0034] In this way, by arranging multiple conductive protective layers arranged at intervals on the surface of the second protective layer and electrically connecting the multiple conductive protective layers, the use area of ​​the conductive protective layer can be reduced, thereby reducing the material cost of the conductive protective layer and the material cost of the protective plate.

[0035] In a possible implementation, there are multiple conductive protective layers, multiple hollow portions, and multiple first protective layers;

[0036] Each of the hollow portions is correspondingly provided on one of the conductive protective layers, and a portion of the conductive protective layer corresponding to each of the hollow portions is exposed;

[0037] Each exposed portion of the conductive protective layer is provided with at least one first protective layer;

[0038] The conductive protective layers are electrically connected to each other, and the conductive structure is electrically connected to at least one of the conductive protective layers.

[0039] In this way, by providing multiple conductive protective layers and multiple hollow portions on the third protective layer, with each hollow portion corresponding to a conductive protective layer, and exposing a portion of the conductive protective layer corresponding to each hollow portion, and providing at least one first protective layer in the exposed area of ​​each conductive protective layer, the area of ​​the first protective layer on the protective plate can be increased, thereby improving the buffering effect of the protective plate and the protective performance of the protective plate for the battery pack. Furthermore, providing multiple conductive protective layers can reduce the material cost of the conductive protective layers, and thus reduce the material cost of the protective plate.

[0040] In a possible implementation, the conductive structure is an elastic conductive member;

[0041] Furthermore, the elastic conductive member is a conductive sponge.

[0042] In this way, by configuring the conductive structure as an elastic conductive member, the probability of the conductive structure being damaged by impact or extrusion can be reduced, thereby improving the durability of the conductive structure and the durability of the protective plate.

[0043] By configuring the elastic conductive member as a conductive sponge, the weight of the elastic conductive member can be reduced, thereby reducing the weight of the protective plate.

[0044] In a possible implementation, the second protective layer is a fiber resin layer;

[0045] And / or, the thickness of the second protective layer is greater than or equal to 0.3 mm and less than or equal to 3.0 mm;

[0046] And / or, the third protective layer is a fiber resin layer;

[0047] And / or, the thickness of the third protective layer is greater than or equal to 0.3 mm and less than or equal to 3.0 mm.

[0048] In one possible implementation,

[0049] The conductive protective layer is a steel plate or an aluminum plate;

[0050] And / or, the thickness of the conductive protective layer is greater than or equal to 0.2 mm and less than or equal to 2.0 mm.

[0051] In this way, by setting the conductive protective layer as a steel plate or an aluminum plate, the structural strength of the conductive protective layer can be guaranteed, the impact resistance of the protective plate can be guaranteed, and the material cost of the conductive protective layer and the manufacturing cost of the protective plate can be reduced.

[0052] By making the thickness of the conductive protective layer greater than or equal to 0.2 mm and less than or equal to 2.0 mm, it is possible to avoid the conductive protective layer having low impact resistance due to being too thin, and it is possible to avoid increasing the manufacturing cost and weight of the conductive protective layer due to being too thick.

[0053] In one possible implementation,

[0054] The first protective layer is a foam protective layer or a honeycomb protective layer;

[0055] And / or, the thickness of the first protective layer is greater than or equal to 1.0 mm and less than or equal to 20 mm.

[0056] Thus, a foam or honeycomb protective layer is typically composed of numerous tiny bubbles or pores, which can compress and deform when impacted, thereby absorbing and dissipating the impact energy. The porous structure enables the foam or honeycomb protective layer to effectively buffer external impact forces, reducing the impact force transmitted to the battery pack or conductive protective layer.

[0057] A second aspect of an embodiment of the present application provides a battery system, which includes a battery pack and the protective plate as described above.

[0058] A third aspect of the embodiments of the present application provides an electrical device, comprising the battery system as described above;

[0059] Alternatively, include a protective plate as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0061] Figure 1 A cross-sectional view of a protective plate provided in an embodiment of the present application;

[0062] Figure 2 A cross-sectional view of another protective plate provided in an embodiment of the present application;

[0063] Figure 3 An exploded view of a protective plate provided in an embodiment of the present application;

[0064] Figure 4 A top view of a protective plate provided in an embodiment of the present application;

[0065] Figure 5 A schematic structural diagram of a first protective layer provided in an embodiment of the present application.

[0066] Description of reference numerals:

[0067] 10-protective plate; 11-mounting hole;

[0068] 100-second protective layer;

[0069] 200-conductive protective layer;

[0070] 300-the third protective layer;

[0071] 310-hollow part;

[0072] 400-first protection layer;

[0073] 500-conductive structure;

[0074] 600-Fourth protection layer. DETAILED DESCRIPTION

[0075] As described in the background art, static electricity generated by vibration and friction between the protective plate and the battery pack in the related art cannot be discharged, which easily causes spark discharge, affecting the safe use of the battery system and the safe use of electrical equipment.

[0076] The reason for this problem is that the first protective layer on the protective plate is directly connected to one of the protective layers, and the first protective layer is set towards the battery pack. During the movement of the electrical equipment, the first protective layer and the battery pack rub against each other, causing static electricity to be generated on the first protective layer and accumulated on the protective plate. Since there is no conductive connection between the protective plate and the metal components on the battery pack or the electrical equipment, the static electricity on the protective plate cannot be eliminated during the continuous friction.

[0077] Although the amount of static electricity is not large, the voltage is very high and it is easy to produce spark discharge. If there is leakage in the battery system, the spark generated by static electricity can easily cause the electrolyte to catch fire, affecting the safe use of the battery system and the safe use of electrical equipment.

[0078] In response to the above technical problems, an embodiment of the present application provides a protective plate, a battery system and an electrical device. The protective plate is provided with a first protective layer on the conductive protective layer. The first protective layer is used to abut against the battery pack or the vehicle body on the side facing away from the conductive protective layer to achieve the effect of buffering and energy absorption.

[0079] Furthermore, by making the first protective layer directly contact with the conductive protective layer, the static electricity generated by the friction between the first protective layer and the battery pack or the vehicle body can be collected on the conductive protective layer, and then by electrically connecting one end of the conductive structure to the conductive protective layer and the other end to the battery pack or the vehicle body, the static electricity collected on the conductive protective layer can be transferred to the battery pack or the vehicle body, so that the battery pack or the vehicle body and the protective plate are connected at the same potential, and the static electricity on the protective plate is eliminated, thereby avoiding the problem of spark discharge caused by static electricity on the protective plate, and can improve the safety of battery system use and the safety of electrical equipment use.

[0080] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0081] refer to Figure 1 、 Figure 2 and Figure 3 The present invention provides a protective plate 10 comprising a conductive protective layer 200, a first protective layer 400, and a conductive structure 500. The first protective layer 400 is connected to the side of the conductive protective layer 200 facing the battery pack or the vehicle body. The conductive structure 500 is adapted to electrically connect the conductive protective layer 200 to the battery pack or the vehicle body, thereby achieving electrical connection between the conductive protective layer 200 and the battery pack or the vehicle body.

[0082] The conductive protective layer 200 can improve the impact resistance of the protective plate 10, and the conductive protective layer 200 can also improve the puncture resistance of the protective plate 10, reducing the probability of the protective plate 10 being punctured, so as to further protect the battery pack.

[0083] The first protective layer 400 is arranged on the conductive protective layer 200. When vibration or friction occurs between the first protective layer 400 and the battery pack, the static electricity generated on the first protective layer 400 can be transferred to the conductive protective layer 200 through contact with the conductive protective layer 200, so as to collect the static electricity on the first protective layer 400 through the conductive protective layer 200.

[0084] One end of the conductive structure 500 is electrically connected to the conductive shielding layer 200, and the other end is used to electrically connect to the battery pack or the vehicle body. It should be noted that the other end of the conductive structure can be used to connect to a conductive part on the battery pack or the vehicle body, such as the metal casing of the battery pack or a metal conductive part on the vehicle body.

[0085] In this way, the static electricity collected by the conductive protective layer 200 on the first protective layer 400 can be transported to the conductive structure 500, and further transported to the battery pack or the vehicle body by the conductive structure 500. This can enable the protective plate 10 and the battery pack to be connected at the same potential, and can eliminate the static electricity on the protective plate 10, avoiding the problem of spark discharge caused by static electricity on the protective plate 10, and can improve the safety of battery system use and the safety of electrical equipment use.

[0086] Furthermore, by providing a first protective layer 400 on the conductive protective layer 200, the first protective layer 400 is used to abut the battery pack or the vehicle body on the side facing away from the conductive protective layer 200, so that a buffer distance can be created between the protective plate 10 and the battery pack, thereby avoiding damage to the battery pack and the protective plate 10 caused by rigid contact between the protective plate 10 and the battery.

[0087] refer to Figure 1 、 Figure 2 and Figure 3 The protective plate 10 may further include a second protective layer 100. The second protective layer 100 is located on the outside facing away from the battery pack. The second protective layer 100 can be used to directly resist external impacts to protect the battery pack.

[0088] The conductive protective layer 200 is disposed on the second protective layer 100. In the thickness direction (eg Figure 1 In the Y direction), the conductive protective layer 200 and the second protective layer 100 can be stacked.

[0089] refer to Figure 1 、 Figure 2 and Figure 3 The protective plate 10 may further include a third protective layer 300. The third protective layer 300 can be stacked on the surface of the conductive protective layer 200 facing away from the second protective layer 100. When the second protective layer 100 is located on the outside facing away from the battery pack, the third protective layer 300 can be located on the inside facing the battery pack.

[0090] In other embodiments, when the second protective layer 100 and the third protective layer 300 are respectively arranged on two surfaces in the thickness direction of the conductive protective layer 200, the second protective layer 100 and the third protective layer 300 can also protect the conductive protective layer 200 to prevent the surface of the conductive protective layer 200 from being scratched and damaged, thereby improving the durability of the conductive protective layer 200 and thereby improving the durability of the protective plate 10.

[0091] refer to Figure 1 and Figure 3 The third protective layer 300 has a hollow portion 310 to expose part of the conductive protective layer 200, and the first protective layer 400 is arranged on the conductive protective layer 200 corresponding to the hollow portion 310 so that the first protective layer 400 can directly contact the conductive protective layer 200.

[0092] Part of the conductive protective layer 200 being exposed can be understood as the area on the conductive protective layer 200 corresponding to the hollow portion 310 being exposed to the external environment, for example, the first protective layer 400 can directly contact the exposed portion of the conductive protective layer 200 through the hollow portion 310.

[0093] In some embodiments, the second protective layer 100, the conductive protective layer 200, the third protective layer 300, the first protective layer 400 and the conductive structure 500 can be connected by gluing. The protective plate 10 can be used to protect a battery pack in a battery system.

[0094] refer to Figure 1 In some embodiments, the second protective layer 100 is a fiber resin layer. A fiber resin layer is a composite layer structure of fibers and resins. The fibers can be glass fiber, carbon fiber, or aramid fiber, and the resin can be epoxy resin, polyester resin, or phenolic resin. By configuring the second protective layer 100 as a fiber resin layer, the structural strength and corrosion resistance of the second protective layer 100 can be improved, while also reducing weight.

[0095] refer to Figure 2 , the thickness of the second protective layer 100 (such as Figure 2 The thickness W1 of the second protective layer 100 is greater than or equal to 0.3 mm and less than or equal to 3.0 mm. For example, the thickness W1 of the second protective layer 100 can be one of 0.4 mm, 0.8 mm, 1.4 mm, 1.6 mm, 1.9 mm, 2.3 mm, 2.5 mm, and 2.8 mm. Alternatively, the thickness W1 of the second protective layer 100 can be any value within the range of greater than or equal to 0.3 mm and less than or equal to 3.0 mm.

[0096] In this way, it is possible to avoid the second protective layer 100 having a lower impact resistance due to the thickness W1 of the second protective layer 100 being too thin, and it is possible to avoid the weight and volume of the second protective layer 100 increasing due to the thickness W1 of the second protective layer 100 being too large, thereby causing the weight and volume of the protective plate 10 to be too large.

[0097] refer to Figure 2 Based on the above embodiment, the third protective layer 300 may also be a fiber resin layer. Thus, by setting the third protective layer as a fiber resin layer, the structural strength and corrosion resistance of the third protective layer can be improved and the weight can be reduced.

[0098] refer to Figure 2 Based on the above embodiment, the thickness of the third protective layer 300 (eg Figure 2 The thickness W2 of the third protective layer 300 is greater than or equal to 0.3 mm and less than or equal to 3.0 mm. For example, the thickness W2 of the third protective layer 300 can be one of 0.4 mm, 0.8 mm, 1.4 mm, 1.6 mm, 1.9 mm, 2.3 mm, 2.5 mm, and 2.8 mm. Alternatively, the thickness W2 of the third protective layer 300 can be any value within the range of greater than or equal to 0.3 mm and less than or equal to 3.0 mm.

[0099] In this way, it is possible to avoid the third protective layer 300 having a lower impact resistance due to the thickness W2 of the third protective layer 300 being too thin, and it is possible to avoid the weight and volume of the third protective layer 300 increasing due to the thickness W2 of the third protective layer 300 being too large, thereby causing the weight and volume of the protective plate 10 to be too large.

[0100] In some embodiments, the third protective layer 300 and the second protective layer 100 can both be configured as fiber resin layers. The thickness of the second protective layer 100 and the third protective layer 300 can also be the same.

[0101] refer to Figure 2 In some embodiments, the conductive protective layer 200 may be a steel plate or an aluminum plate.

[0102] In this way, by setting the conductive protective layer 200 as a steel plate or an aluminum plate, the structural strength of the conductive protective layer 200 can be guaranteed, the impact resistance of the protective plate 10 can be guaranteed, and the material cost of the conductive protective layer 200 and the manufacturing cost of the protective plate 10 can be reduced.

[0103] In other embodiments, the thickness of the conductive protection layer 200 (eg Figure 2 The thickness W3 of the conductive shielding layer 200 is greater than or equal to 0.2 mm and less than or equal to 2.0 mm. For example, the thickness W3 of the conductive shielding layer 200 can be one of 0.4 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, 1.5 mm, and 1.8 mm. Alternatively, the thickness W3 of the conductive shielding layer 200 can be any value within the range of greater than or equal to 0.2 mm and less than or equal to 2.0 mm.

[0104] In this way, by making the thickness W3 of the conductive protective layer 200 greater than or equal to 0.2 mm and less than or equal to 2.0 mm, it is possible to avoid the conductive protective layer 200 having low impact resistance due to being too thin, and it is possible to avoid increasing the manufacturing cost and weight of the conductive protective layer 200 due to being too thick.

[0105] refer to Figure 1 and Figure 2 In some embodiments, the first protective layer 400 is a foam protective layer or a honeycomb protective layer. For example, the first protective layer 400 can be microporous polypropylene foam.

[0106] The foam or honeycomb protective layer is typically composed of numerous tiny bubbles or pores, which compress and deform when impacted, thereby absorbing and dissipating the impact energy. The porous structure enables the foam or honeycomb protective layer to effectively buffer external impact forces, reducing the impact force transmitted to the battery pack or conductive protective layer 200.

[0107] In some embodiments, the thickness of the first protective layer 400 (eg Figure 2 The thickness W4 of the first protective layer 400 may be greater than or equal to 1.0 mm and less than or equal to 20 mm. For example, the thickness W4 of the first protective layer 400 may be one of 1.4 mm, 2.5 mm, 5.7 mm, 7.8 mm, 10.1 mm, 14.3 mm, 16.5 mm, and 18.8 mm. Alternatively, the thickness W4 of the first protective layer 400 may be any value within the range of greater than or equal to 1.0 mm and less than or equal to 20 mm.

[0108] In this way, it is possible to avoid the first protective layer 400 being too thin to buffer and absorb impact energy, and to avoid the first protective layer 400 being too thick, which causes the protective plate 10 to occupy a larger volume, and to reduce the waste of material of the first protective layer 400 and the manufacturing cost of the protective layer.

[0109] refer to Figure 2 and Figure 5 In some embodiments, in the thickness direction of the conductive protective layer 200, the outer contour of the first protective layer 400 can be a rectangle, a square or an irregular shape, which is not specifically limited.

[0110] refer to Figure 2 and Figure 4 In some embodiments, in the thickness direction of the conductive protective layer 200 , the orthographic projection of the inner edge of the hollow portion 310 is located within the orthographic projection of the conductive protective layer 200 .

[0111] In this way, by making the orthographic projection of the inner edge of the hollow portion 310 located within the orthographic projection of the conductive protective layer 200 in the thickness direction of the conductive protective layer 200, the coverage area of ​​the hollow portion 310 can be made smaller than the surface area of ​​the conductive protective layer 200, so that the solid part of the third protective layer 300 other than the hollow portion 310 can be covered on the conductive protective layer 200, so that the conductive protective layer 200 can be fixed by the solid part of the third protective layer 300, thereby improving the structural stability of the protective plate 10.

[0112] refer to Figure 2 In some embodiments, in the thickness direction of the conductive shielding layer 200, the ratio of the orthographic projection area of ​​the first shielding layer 400 to the orthographic projection area of ​​the exposed conductive shielding layer 200 is greater than or equal to 0.1 and less than or equal to 1. For example, the ratio of the orthographic projection area of ​​the first shielding layer 400 to the orthographic projection area of ​​the exposed conductive shielding layer 200 can be one of 0.2, 0.3, 0.5, 0.8, and 0.9. Alternatively, the ratio of the orthographic projection area of ​​the first shielding layer 400 to the orthographic projection area of ​​the exposed conductive shielding layer 200 can be any value within the range of greater than or equal to 0.1 and less than or equal to 1.

[0113] In this way, by making the ratio of the orthographic projection area of ​​the first protective layer 400 to the orthographic projection area of ​​the exposed conductive protective layer 200 greater than or equal to 0.1 and less than or equal to 1, it is possible to avoid the area of ​​the first protective layer 400 being too small due to a too small ratio, thereby resulting in a lower buffering effect of the first protective layer 400 and affecting the impact resistance of the protective plate 10.

[0114] refer to Figure 1 In some embodiments, in the thickness direction of the conductive shielding layer 200 , the outer contour area of ​​the orthographic projection of the conductive shielding layer 200 is equal to the outer contour area of ​​the orthographic projection of the second shielding layer 100 .

[0115] It is understood that the outer contour area of ​​the orthographic projection of the conductive protective layer 200 can be the area enclosed by the outer edges of the orthographic projection pattern of the conductive protective layer 200. The outer contour area of ​​the orthographic projection of the second protective layer 100 can be the area enclosed by the outer edges of the orthographic projection pattern of the second protective layer 100. In this case, the outer contour of the orthographic projection of the conductive protective layer 200 coincides with the outer contour of the orthographic projection of the second protective layer 100, and the surface area of ​​the conductive protective layer 200 is the same as the surface area of ​​the second protective layer 100.

[0116] In this way, by making the orthographic projection area of ​​the outer contour of the conductive protective layer 200 equal to the orthographic projection area of ​​the outer contour of the second protective layer 100, it is possible to avoid the problem that the second protective layer 100 cannot completely cover the conductive protective layer 200 due to the excessive size of the conductive protective layer 200, thereby reducing the protective effect of the second protective layer 100 on the conductive protective layer 200.

[0117] In other embodiments, the outer contour of the orthographic projection of the third protective layer 300 can also coincide with the outer contour of the orthographic projection of the second protective layer 100 in the thickness direction of the conductive protective layer 200. It is understood that the outer contour area of ​​the orthographic projection of the third protective layer 300 can be the area enclosed by the outer edge of the orthographic projection pattern of the third protective layer 300.

[0118] refer to Figure 2 In some embodiments, the orthographic projection area of ​​the outer contour of the conductive shielding layer 200 is smaller than the orthographic projection area of ​​the outer contour of the second shielding layer 100 in the thickness direction of the conductive shielding layer 200. In this case, the outer edge of the conductive shielding layer 200 completely falls within the outer edge of the second shielding layer 100. The edge of the conductive shielding layer 200 can be shielded by the edge of the second shielding layer 100, reducing the chance of scratches and damage to the edge of the conductive shielding layer 200.

[0119] In this way, by making the orthographic projection of the conductive protective layer 200 located within the orthographic projection of the second protective layer 100, the second protective layer 100 can completely cover the conductive protective layer 200, thereby improving the protective effect of the second protective layer 100 on the conductive protective layer 200 and preventing the surface of the conductive protective layer 200 in the thickness direction from being scratched.

[0120] In some embodiments, in the thickness direction of the conductive protective layer 200, the outer contour of the conductive protective layer 200 can also fall within the outer contour of the third protective layer 300, so as to protect the surface of the conductive protective layer 200 facing the third protective layer 300 through the edge portion of the third protective layer 300.

[0121] refer to Figure 2 Based on the above embodiment, the protective plate 10 may further include a fourth protective layer 600 , which is disposed between the third protective layer 300 and the second protective layer 100 , and the fourth protective layer 600 is wrapped around the outer contour of the conductive protective layer 200 .

[0122] In this way, by providing the fourth protection layer 600 on the outer contour of the conductive protection layer 200 , the outer peripheral edge of the conductive protection layer 200 can be protected, thereby improving the protection performance of the conductive protection layer 200 .

[0123] In other embodiments, in the thickness direction of the conductive protective layer 200, when the orthographic projection of the conductive protective layer 200 is located within the orthographic projection of the second protective layer 100, by arranging the fourth protective layer 600 on the outer peripheral side of the conductive protective layer 200, the fourth protective layer 600 can fill the gap formed between the second protective layer 100 and the third protective layer 300, thereby avoiding the problem of the outer edges of the second protective layer 100 and the third protective layer 300 being damaged by impact due to lack of support, thereby improving the durability of the second protective layer 100 and the third protective layer 300, and improving the durability of the protective plate 10.

[0124] refer to Figure 2 In some embodiments, in the thickness direction of the conductive shielding layer 200 , the thickness of the fourth shielding layer 600 is equal to the thickness of the conductive shielding layer 200 .

[0125] In this way, by making the thickness of the fourth protective layer 600 the same as the thickness of the conductive protective layer 200, the flatness of the surface of the conductive protective layer 200 and the fourth protective layer 600 can be improved, the fit between the second protective layer 100 and the surface of the conductive protective layer 200 and the fourth protective layer 600 can be improved, and the fit between the third protective layer 300 and the surface of the conductive protective layer 200 and the fourth protective layer 600 can be improved.

[0126] In some embodiments, the fourth protective layer 600 may also be a fiber resin layer, which can improve the structural strength and corrosion resistance of the first protective layer and reduce the weight.

[0127] refer to Figure 3 and Figure 4 In some embodiments, there may be multiple conductive protective layers 200, and the multiple conductive protective layers 200 are arranged at intervals on the surface of the second protective layer 100, and the conductive protective layers 200 are electrically connected to each other. For example, the conductive protective layers 200 can be conductively connected through electrical connectors, and the electrical connectors can be wires.

[0128] The hollow portion 310 may have one, and the hollow portion 310 can expose at least a portion of one of the conductive protection layers 200. The conductive structure 500 is electrically connected to at least one of the conductive protection layers 200.

[0129] In some examples, the hollow portion 310 can expose a portion of one conductive shielding layer 200 , and the first shielding layer 400 is disposed on the exposed area of ​​the one conductive shielding layer 200 .

[0130] The hollow portion 310 can also simultaneously expose a portion of the plurality of conductive protection layers 200 , and the first protection layer 400 can be simultaneously disposed on the exposed areas of the plurality of conductive protection layers.

[0131] In this way, by arranging multiple conductive protective layers 200 arranged at intervals on the surface of the second protective layer 100 and electrically connecting the multiple conductive protective layers 200, the use area of ​​the conductive protective layer 200 can be reduced, thereby reducing the material cost of the conductive protective layer 200 and the material cost of the protective plate 10.

[0132] refer to Figure 3 and Figure 4 In some embodiments, there may be multiple conductive protective layers 200 , multiple hollow portions 310 , and multiple first protective layers 400 .

[0133] Each hollow portion 310 is disposed on a corresponding conductive shielding layer 200, exposing a portion of the conductive shielding layer 200 corresponding to each hollow portion 310. At least one first shielding layer 400 is disposed on the exposed portion of each conductive shielding layer 200. The conductive shielding layers 200 are electrically connected to each other, and the conductive structure 500 is electrically connected to at least one of the conductive shielding layers 200.

[0134] It should be noted that the electrically connected manner of each conductive protective layer 200 can be that each conductive protective layer 200 is connected in sequence along the arrangement direction, or multiple conductive protective layers 200 can be electrically connected to one of the conductive protective layers 200, and there is no specific limitation on this.

[0135] Thus, by providing multiple conductive protective layers 200 and multiple hollow portions 310 on the third protective layer 300, with each hollow portion 310 corresponding to a conductive protective layer 200, and exposing a portion of the conductive protective layer 200 corresponding to each hollow portion 310, and providing at least one first protective layer 400 in the exposed area of ​​each conductive protective layer 200, the area of ​​the first protective layer 400 on the protective plate 10 can be increased, thereby improving the buffering effect of the protective plate 10 and the protective performance of the protective plate 10 for the battery pack. Furthermore, providing multiple conductive protective layers 200 can reduce the material cost of the conductive protective layer 200, and thus reduce the material cost of the protective plate 10.

[0136] In some embodiments, based on the above embodiments, if there are multiple conductive shielding layers 200, there may also be multiple conductive structures 500. A conductive structure 500 is provided between each two adjacent conductive shielding layers 200, and two adjacent conductive shielding layers 200 can be electrically connected via the conductive structure 500 therebetween. Each conductive structure 500 can be electrically connected to the battery pack.

[0137] refer to Figure 2 In some embodiments, the conductive structure 500 may be an elastic conductive member, such as a conductive sponge.

[0138] In this way, by configuring the conductive structure 500 as an elastic conductive member, the probability of the conductive structure 500 being damaged by impact or extrusion can be reduced, thereby improving the durability of the conductive structure 500 and the durability of the protective plate 10.

[0139] By configuring the elastic conductive member as a conductive sponge, the weight of the elastic conductive member can be reduced, thereby reducing the weight of the protective plate 10 .

[0140] An embodiment of the present application also provides a battery system, which may include a battery pack and the protective plate 10 as described above.

[0141] refer to Figure 2 In some embodiments, the protective plate 10 can be connected to the battery pack via a connector, such as a bolt or screw. A mounting hole 11 can be defined in the thickness direction of the protective plate 10, and the connector is inserted through the mounting hole 11 and connected to the battery pack.

[0142] An embodiment of the present application provides a battery system. By using the above-mentioned protective plate, the battery system can achieve equipotential connection between the battery pack and the protective plate, thereby preventing the protective plate from catching fire due to static electricity and affecting the safety of the battery pack, thereby improving the safety of the battery system.

[0143] An embodiment of the present application also provides an electrical device, which may include the battery system as described above.

[0144] An embodiment of the present application provides an electrical device. By using the above-mentioned battery system, the electrical device can reduce the probability of battery system failure or fire, thereby improving the safety of the electrical device.

[0145] Among them, the electrical equipment can be a vehicle or an energy storage device. Among them, the vehicle can be a new energy vehicle (New Energy Vehicle), such as a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle; abbreviated as: PEV / BEV), a range extended electric vehicle (Range Extended Electric Vehicle; abbreviated as: REEV), a hybrid electric vehicle (Hybrid Electric Vehicle; abbreviated as: HEV), a fuel cell electric vehicle), and the vehicle can also be any vehicle with a battery pack.

[0146] The electrical device may be a motor or an electronically controlled device, such as vehicle-mounted equipment or air-conditioning components.

[0147] The present application also provides an electrical device, which may include the above-described protective plate 10. If the electrical device is a vehicle, the protective plate 10 may be provided on the vehicle body to protect the vehicle body, and the protective plate 10 may also be electrically connected to the vehicle body at the same potential.

[0148] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0149] It should be noted that phrases such as "in a specific implementation," "in some embodiments," "in this embodiment," and "exemplarily" mentioned in the specification indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0150] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0151] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0152] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A protective plate (10), characterized in that: include: Conductive protective layer (200); a first protective layer (400), connected to a side of the conductive protective layer (200) facing the battery pack or the vehicle body; The conductive structure (500) is suitable for electrically connecting the conductive protective layer (200) to a battery pack or a vehicle body.

2. The protective plate according to claim 1, characterized in that The protective plate further comprises a second protective layer (100) arranged on a side of the conductive protective layer (200) facing away from the first protective layer (400).

3. The protective plate according to claim 2, characterized in that The protective plate further comprises a third protective layer (300) arranged on a side of the conductive protective layer (200) facing away from the second protective layer (100); The third protective layer (300) has a hollow portion (310) to expose a portion of the conductive protective layer (200); The first protective layer (400) is provided on the conductive protective layer (200) corresponding to the hollow portion (310).

4. The protective plate according to claim 3, characterized in that In the thickness direction of the conductive protective layer (200), the orthographic projection of the inner edge of the hollow portion (310) is located within the orthographic projection of the conductive protective layer (200).

5. The protective plate according to claim 3, characterized in that In the thickness direction of the conductive protective layer (200), the ratio of the orthographic projection area of ​​the first protective layer (400) to the orthographic projection area of ​​the exposed conductive protective layer (200) is greater than or equal to 0.1 and less than or equal to 1.

6. The protective plate according to claim 2, characterized in that In the thickness direction of the conductive protective layer (200), the outer contour area of ​​the orthographic projection of the conductive protective layer (200) is equal to the outer contour area of ​​the orthographic projection of the second protective layer (100).

7. The protective plate according to claim 2, characterized in that In the thickness direction of the conductive protective layer (200), the outer contour area of ​​the orthographic projection of the conductive protective layer (200) is smaller than the outer contour area of ​​the orthographic projection of the second protective layer (100).

8. The protective plate according to claim 7, characterized in that The protective plate further comprises a third protective layer (300) arranged on a side of the conductive protective layer (200) facing away from the second protective layer (100); The protective plate further comprises a fourth protective layer (600); The fourth protective layer (600) is arranged between the third protective layer (300) and the second protective layer (100), and the fourth protective layer (600) is wrapped around the outer contour of the conductive protective layer (200).

9. The protective plate according to claim 8, characterized in that In the thickness direction of the conductive protective layer (200), the thickness of the fourth protective layer (600) is equal to the thickness of the conductive protective layer (200).

10. The protective plate according to any one of claims 3 to 9, characterized in that: There are a plurality of the conductive protective layers (200), and the plurality of the conductive protective layers (200) are arranged at intervals on the surface of the second protective layer (100), and the conductive protective layers (200) are electrically connected to each other; The protective plate further comprises a third protective layer (300) arranged on a side of the conductive protective layer (200) facing away from the second protective layer (100); The third protective layer (300) has a hollow portion (310) to expose a portion of the conductive protective layer (200); The hollow portion (310) exposes at least a portion of one of the conductive protective layers (200); The conductive structure (500) is electrically connected to at least one of the conductive protective layers (200).

11. The protective plate according to any one of claims 3 to 9, characterized in that: The protective plate further comprises a third protective layer (300) arranged on a side of the conductive protective layer (200) facing away from the second protective layer (100); The third protective layer (300) has a hollow portion (310) to expose a portion of the conductive protective layer (200); There are multiple conductive protective layers (200), there are multiple hollow portions (310), and there are multiple first protective layers (400); Each hollow portion (310) is correspondingly provided on one of the conductive protective layers (200), and a portion of the conductive protective layer (200) corresponding to each hollow portion (310) is exposed; The exposed portion of each conductive protective layer (200) is provided with at least one first protective layer (400); The conductive protective layers (200) are electrically connected to each other, and the conductive structure (500) is electrically connected to at least one of the conductive protective layers (200).

12. The protective plate according to any one of claims 3 to 9, characterized in that: The conductive structure (500) is an elastic conductive member; Furthermore, the elastic conductive member is a conductive sponge.

13. The protective plate according to any one of claims 1 to 9, characterized in that: The first protective layer (400) is a foam protective layer or a honeycomb protective layer; And / or, the thickness of the first protective layer (400) is greater than or equal to 1.0 mm and less than or equal to 20 mm.

14. A battery system, characterized in that: It comprises a battery pack and a protective plate as described in any one of claims 1 to 13.

15. An electrical device, characterized in that: comprising the battery system of claim 14; Alternatively, it comprises the protective plate according to any one of claims 1-13.

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