Battery tray assembly, battery pack, vehicle

Abstract

The present invention discloses a battery tray assembly, a battery pack, and a vehicle. The battery tray assembly includes: a tray and a conductive member. The tray forms an installation space suitable for accommodating a battery pack and the tray and the battery pack are insulated; the conductive member is arranged on the tray and at least partially located in the installation space, and one end of the conductive member is used to connect to a preset potential point; wherein when there is no conductive medium in the installation space, the conductive member is used to provide a first potential signal between the battery pack and the preset potential point; when there is a conductive medium in the installation space, the conductive member connects the battery pack to the preset potential point through the conductive medium to provide a second potential signal between the battery pack and the preset potential point; the first potential signal and the second potential signal are used to characterize whether there is a conductive medium in the installation space. The battery tray assembly according to the present invention is provided with a conductive member, which can promptly warn the user of the situation in which there is a conductive medium between the tray and the battery pack, so that the user can find it in time to avoid safety accidents.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a battery tray assembly, a battery pack, and a vehicle. Background Art

[0002] In the related art, the vehicle's power battery is equipped with a leakage detector for detecting whether the battery pack is leaking. Specifically, the battery pack of the battery pack is stacked and welded to form a high-voltage circuit, and a potential signal is formed between the high-voltage circuit and the vehicle ground. The potential signal detected by the leakage detector is the potential signal of the circuit formed by the high-voltage circuit, the vehicle ground and the leakage detector. When the battery pack operates normally, the potential signal is a working potential signal, and when the battery pack leaks, the potential signal is a fault potential signal. The leakage detector detects the potential signal in real time and judges the potential signal. When the potential signal is a fault potential signal, the leakage detector determines that the battery pack is leaking and reports the leakage information to the vehicle.

[0003] In the prior art, the battery pack tray is made of composite materials, which have good insulation properties similar to plastics and can play a good role in insulation protection during the operation of the battery pack. However, when the battery pack is poorly sealed, causing water to enter the pack, or the electrolyte in the battery leaks, or condensation water is generated inside the pack and accumulates inside the tray, the current leakage detector cannot detect the presence of conductive media in the tray. If the electrolyte or accumulated water inside the tray soaks the battery pack for a long time, the aluminum shell of the battery cell will be electrolyzed, seriously affecting the battery life. Moreover, the electrolysis of the aluminum shell to a certain extent will cause the battery aluminum shell to be perforated and leak, leading to more serious safety accidents. Therefore, it is necessary to detect whether there is a conductive medium in the battery tray. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a battery tray assembly. The battery tray assembly according to the present invention is provided with a conductive member, which can promptly warn of the presence of a conductive medium between the tray and the battery pack, so that the user can find it in time to avoid safety accidents.

[0005] The present invention also provides a battery pack and a vehicle having the battery tray assembly.

[0006] According to the present invention, the battery tray assembly includes: a tray, which forms an installation space suitable for accommodating a battery pack and is insulated from the battery pack; a conductive member, which is arranged on the tray and at least partially located in the installation space, and one end of the conductive member is used to connect to a preset potential point; wherein when there is no conductive medium in the installation space, the conductive member is used to provide a first potential signal between the battery pack and the preset potential point; when there is a conductive medium in the installation space, the conductive member connects the battery pack to the preset potential point through the conductive medium to provide a second potential signal between the battery pack and the preset potential point; the first potential signal and the second potential signal are used to characterize whether there is a conductive medium in the installation space.

[0007] The battery tray assembly of the present invention adds a conductive part used as a conductive medium detection point. When there is a conductive medium inside the tray, a current path can be formed between the battery pack, the conductive medium, the conductive part and the preset potential point. The battery management system can promptly detect the change in the potential difference between the battery pack and the preset potential point, thereby reporting a potential signal indicating the presence of the conductive medium in the installation space to the entire vehicle. The use of the battery tray assembly can promptly detect battery leakage or water accumulation in the tray, and has high safety.

[0008] According to some embodiments of the present invention, the preset potential point is configured as a vehicle ground.

[0009] According to some embodiments of the present invention, the tray includes a grounding member, the grounding member is grounded, and one end of the conductive member is electrically connected to the grounding member.

[0010] According to some embodiments of the present invention, a plurality of conductive members spaced apart along a second direction are provided on both sides of the tray in the first direction; wherein the first direction is perpendicular to the second direction.

[0011] According to some embodiments of the present invention, a plurality of conductive members are symmetrically arranged in the second direction of the tray.

[0012] According to some embodiments of the present invention, the conductive member includes a first conductive member and a second conductive member spaced apart in a second direction of the tray; wherein the length of the tray in the second direction is S, the distance between the first conductive member and one end of the tray is S1, the distance between the second conductive member and the other end of the tray is S2 and satisfies: 0.15<S1 / S<0.35; 0.15<S2 / S<0.35.

[0013] According to some embodiments of the present invention, the tray includes: a bottom plate, the bottom plate supports the battery pack and is configured as an insulating member; and a frame, the frame is disposed on the periphery of the bottom plate and is configured as the grounding member.

[0014] According to some embodiments of the present invention, the battery tray assembly further includes: a lifting ear, which is connected to the outer periphery of the frame and is configured as the grounding member, and the conductive member is connected to the lifting ear.

[0015] According to some embodiments of the present invention, an outwardly protruding support protrusion is formed on the outer periphery of the bottom plate, and the support protrusion extends to the lifting ear, and at least part of the conductive member is disposed on the support protrusion and electrically connected to the lifting ear.

[0016] According to some embodiments of the present invention, the base plate includes: a base plate body; a side plate, which is arranged at the outer periphery of the base plate body and defines the battery pack installation space together with the base plate body; a flange portion, which is arranged at the outer edge of the side plate and extends in a direction away from the installation space, and the support protrusion is formed on the flange portion.

[0017] According to some embodiments of the present invention, the frame includes: a front side beam and a rear side beam, the front side beam and the rear side beam are arranged opposite to each other; a side beam, the side beam is constructed in two and each of the side beams is connected to the front side beam and the rear side beam, and the two side beams are respectively arranged at the two ends of the front side beam and the rear side beam; the side beam includes: an outer support portion, the outer support portion is suitable for supporting the flange portion; an inner support portion, the height of the inner support portion is smaller than the height of the outer support portion, and the inner support portion is located on the side of the outer support portion facing the installation space, and the inner support portion is suitable for supporting the bottom plate body.

[0018] According to some embodiments of the present invention, a plurality of weight-reducing cavities extending in the front-to-rear direction are formed in the outer support portion, and the side wall between two adjacent weight-reducing cavities is inclined.

[0019] According to some embodiments of the present invention, a plurality of support grooves extending in the front-to-rear direction and spaced apart in the width direction are provided at the bottom of the inner support portion, and the support grooves are located at the lower side of the bottom plate.

[0020] According to some embodiments of the present invention, the inner support portion is formed with a water storage tank.

[0021] According to some embodiments of the present invention, the conductive member is integrally provided with the bottom plate.

[0022] According to some embodiments of the present invention, the tray is an insulating member, and the battery tray assembly further includes: a conductive fastener, the conductive fastener is configured as the grounding member, and the conductive fastener is used to fasten the tray and the conductive member.

[0023] The following briefly describes a battery pack according to an embodiment of the second aspect of the present invention.

[0024] The battery pack according to the present invention includes: a battery tray, the battery tray is constructed as the battery tray assembly described in any one of the above embodiments; a battery pack, the battery pack is arranged in the installation space, when there is no conductive medium in the installation space, a first potential signal is formed between the battery pack and the preset potential point; when there is a conductive medium in the installation space, a second potential signal is formed between the battery pack and the preset potential point, the first potential signal and the second potential signal are used to characterize whether there is a conductive medium in the installation space. Since the battery pack of the present invention has the above battery tray, the battery pack can promptly detect leakage caused by water accumulation in the battery or leakage of electrolyte, and has good safety performance.

[0025] According to some embodiments of the present invention, the battery pack further includes: a battery management system, wherein the battery management system is used to detect a potential signal between the battery group and the preset potential point to detect whether there is a conductive medium in the battery pack.

[0026] According to some embodiments of the present invention, the battery pack includes a plurality of single cells arranged at intervals in the second direction, and the conductive member is disposed opposite to one of the single cells in the first direction of the battery tray.

[0027] According to some embodiments of the present invention, the width of the single battery cell in the battery pack in the first direction is W1, the width of the conductive member in the first direction is W2, and 0.25<W2 / W1<0.98 is satisfied.

[0028] According to some embodiments of the present invention, the shell of the battery pack is charged; and / or, the battery pack is provided with a pole lead-out piece, the pole lead-out piece is connected to the pole of the single battery cell and extends to the battery tray.

[0029] The following briefly describes a vehicle according to an embodiment of the third aspect of the present invention.

[0030] The vehicle according to the present invention includes the battery pack described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the battery pack of the above embodiments, the vehicle can warn of leakage of electrolyte or accumulation of water in the battery pack, so that the user can discover it in time to avoid safety accidents.

[0031] To summarize, the battery tray assembly according to the present invention can promptly detect the presence of conductive media on the battery tray that may cause battery leakage, and the battery pack and vehicle equipped with the battery tray assembly of the present application are safer; multiple conductive parts are evenly distributed on the tray, which increases the probability of detecting the conductive medium in the running vehicle and ensures driving safety; the conductive parts are integrally formed with the tray, and the production of the conductive parts and the tray can be completed by hot pressing the conductive parts on the existing tray structure, which is convenient for processing; the tray frame is provided with an inner support part and an outer support part to improve the load-bearing capacity of the bottom plate, increase the rigidity of the bottom plate, avoid deformation of the bottom plate, and enhance the overall stability of the tray assembly; the tray assembly is provided with a water storage tank to cache the conductive medium in the battery pack to prevent internal leakage of the battery pack and improve the safety of the battery pack.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 It is a schematic diagram of the principle of detecting conductive media by a battery tray assembly according to an embodiment of the present invention.

[0035] Figure 2 is an exploded diagram of a battery pack according to an embodiment of the present invention.

[0036] Figure 3 is a structural diagram of a tray according to an embodiment of the present invention.

[0037] Figure 4 4 is a diagram showing the ratio of the width of the battery cell to the width of the conductive member according to an embodiment of the present invention.

[0038] Figure 5 2 is a diagram showing the coordination between a conductive member and a tray according to an embodiment of the present invention.

[0039] Figure 6 1 is a cross-sectional view of a conductive fastener, a conductive member and a lifting ear after being matched according to an embodiment of the present invention.

[0040] Figure 7 is an enlarged view of a frame according to an embodiment of the present invention.

[0041] Reference numerals:

[0042] Battery tray assembly 100;

[0043] Installation space 110a; bottom plate 111; support protrusion 111a; bottom plate body 1111; side plate 1112; flange portion 1113; frame 112; outer support portion 1121; weight reduction cavity 1121a; inner support portion 1122; support groove 1122a;

[0044] Lifting ear 120; conductive member 130; conductive fastener 140;

[0045] Battery pack 200; single cell 210; insulation resistance R0; conductive medium resistance R1; conductive element resistance R2. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the related art, the vehicle's power battery is equipped with a leakage detector for detecting whether the battery pack is leaking. Specifically, the battery pack of the battery pack is stacked and welded to form a high-voltage circuit, and a potential signal is formed between the high-voltage circuit and the vehicle ground. The potential signal detected by the leakage detector is the potential signal of the circuit formed by the high-voltage circuit, the vehicle ground and the leakage detector. When the battery pack operates normally, the potential signal is a working potential signal, and when the battery pack leaks, the potential signal is a fault potential signal. The leakage detector detects the potential signal in real time and judges the potential signal. When the potential signal is a fault potential signal, the leakage detector determines that the battery pack is leaking and reports the leakage information to the vehicle.

[0052] In the prior art, the battery pack tray is made of composite materials, which have good insulation properties similar to plastics and can play a good role in insulation protection during the operation of the battery pack. However, when the battery pack is poorly sealed, causing water to enter the pack, or the electrolyte in the battery leaks, or condensation water is generated inside the pack and accumulates inside the tray, the current leakage detector cannot detect the presence of conductive media in the tray. If the electrolyte or accumulated water inside the tray soaks the battery pack for a long time, the aluminum shell of the battery cell will be electrolyzed, seriously affecting the battery life. Moreover, the electrolysis of the aluminum shell to a certain extent will cause the battery aluminum shell to be perforated and leak, leading to more serious safety accidents. Therefore, it is necessary to detect whether there is a conductive medium in the battery tray.

[0053] Reference below Figure 1-Figure 7 A battery tray assembly 100 according to an embodiment of the present invention is described.

[0054] like Figure 2As shown, the battery tray assembly 100 according to the present invention includes: a tray and a conductive member 130. The tray forms an installation space 110a suitable for accommodating a battery pack 200, and the tray and the battery pack 200 are insulated; the conductive member 130 is arranged on the tray and at least partially located in the installation space 110a, and one end of the conductive member 130 is used to connect with a preset potential point; wherein when there is no conductive medium in the installation space 110a, the conductive member 130 is used to provide a first potential signal between the battery pack 200 and the preset potential point; when there is a conductive medium in the installation space 110a, the conductive member 130 connects the battery pack 200 with the preset potential point through the conductive medium to provide a second potential signal between the battery pack 200 and the preset potential point; the first potential signal and the second potential signal are used to characterize whether there is a conductive medium in the installation space 110a.

[0055] Specifically, the battery pack 200 is arranged on the tray, and the tray is also provided with a conductive member 130. The battery pack has a battery management system, and the battery management system can detect the potential difference between the battery pack 200 and a preset potential point. Since the conductive member 130 is connected to the preset potential point, the potential of the conductive member 130 is equal to that of the preset potential point, and therefore the battery management system can detect the potential difference between the battery pack 200 and the conductive member 130. The conductive medium can conduct current. When there is no conductive medium in the installation space 110a, the battery pack 200 and the conductive member 130 are disconnected, and the battery management system detects the potential difference between the battery pack 200 and the conductive member 130, that is, the potential difference between the battery pack 200 and the preset potential point. This potential difference is the potential difference when the battery is working normally. The battery management system converts the potential difference when the battery is working normally into a first potential signal. It can be understood that the first potential signal can be a voltage signal of the potential difference, or it can be a voltage signal of the insulation resistance set by the battery pack; when there is a conductive medium in the installation space 110a, the conductive medium is located between the battery pack 200 and the tray, and the battery pack 200, the conductive medium, the conductive member 130 and the preset potential point together form a current path. At this time, the potential difference between the battery pack 200 and the conductive member 130 detected by the battery management system changes due to the presence of the conductive medium. This potential difference is the potential difference when the battery fails. The battery management system converts the potential difference that changes when the battery fails into a second potential signal. By adding a conductive member 130 in a battery pack having a battery management system, the potential difference between the battery group 200 and a preset potential point can be detected, thereby determining whether a conductive medium exists in the battery pack.

[0056] More specifically, to ensure that the battery pack does not leak electricity under normal working conditions, the tray and the battery pack 200 should be insulated to disconnect the circuit. In order to detect the presence of a conductive medium between the tray and the battery pack 200, a conductive member 130 is provided on the insulating tray. Only when there is a conductive medium between the tray and the battery pack 200, current flows between the battery pack 200 and the conductive member 130, and a potential difference is formed between the battery pack 200 and a preset potential point. The battery management system can detect the change in the potential difference and convert it into a second potential signal. When there is no conductive medium between the tray and the battery pack 200, there will be a first potential signal between the battery pack 200 and the preset point. The battery management system determines whether there is a conductive medium in the tray based on the change between the first potential signal and the second potential signal, and then reports the relevant information to the entire vehicle, thereby warning the user to avoid vehicle safety accidents. It is understandable that the conductive medium can be electrolyte leaked from the battery pack, or water that penetrates from the outside due to poor sealing of the package or condensed water generated inside the package. The accumulated water on the tray has conductive positive and negative ions, or other media that can electrically connect the battery pack 200 to the conductive member 130.

[0057] The battery tray assembly 100 of the present invention is additionally provided with a conductive member 130, and the conductive member 130 is used as a conductive medium detection point. When there is a conductive medium inside the tray, a current path can be formed between the battery pack 200, the conductive medium, the conductive member 130 and the preset potential point. The battery management system can promptly detect the change in the potential difference between the battery pack 200 and the preset potential point, thereby reporting to the entire vehicle a potential signal indicating the presence of a conductive medium in the installation space 110a. The use of the battery tray assembly 100 can promptly detect battery leakage or water accumulation in the tray, and has high safety.

[0058] In some embodiments of the present invention, the conductive member 130 is made of copper or aluminum, which is easy to process and has good conductivity.

[0059] In some embodiments of the present invention, the preset potential point can be set to any position of the tray as long as it can generate a potential difference with the battery pack 200 so that the battery management system can detect the change in the potential difference.

[0060] According to some embodiments of the present invention, the preset potential point is configured as the vehicle ground. Specifically, the conductive member 130 is connected to the preset potential point, that is, the conductive member 130 is directly grounded. When the battery is operating normally, the first potential signal detected by the battery management system is the potential difference between the battery pack 200 and the vehicle ground. When there is a conductive medium in the battery tray, the second potential signal detected by the battery management system is the changed potential difference between the battery pack 200, the conductive medium, and the vehicle ground. At this time, the conductive member 130 acts as a grounding member and is directly connected to the vehicle ground, so that the battery tray assembly 100 has fewer parts.

[0061] According to some embodiments of the present invention, the tray includes a grounding member, the grounding member is grounded, and one end of the conductive member 130 is electrically connected to the grounding member. Specifically, the grounding member is grounded, the potential of the grounding member is zero, and the conductive member 130 is at the same potential as the vehicle ground through the grounding member. Similarly, when the battery is working normally, the first potential signal detected by the battery management system is the potential difference between the battery pack 200 and the vehicle ground. When there is a conductive medium in the battery tray, the second potential signal detected by the battery management system is the changed potential difference between the battery pack 200, the conductive medium, and the vehicle ground. At this time, the conductive member 130 is grounded through the grounding member.

[0062] According to some embodiments of the present invention, Figure 3 As shown, both sides of the tray in the first direction are provided with a plurality of conductive members 130 spaced apart along the second direction; wherein the first direction and the second direction are perpendicular. Specifically, the conductive members 130 are constructed in a plurality, and the plurality of conductive members 130 are spaced apart and distributed on both sides of the tray. When there is a conductive medium in the tray, the conductive medium will flow due to the running of the vehicle. When the conductive medium flows between the conductive member 130 and the battery pack 200, the conductive medium connects the circuit between the battery pack 200 and the preset potential point and forms a potential difference. The battery management system detects the potential difference and converts it into a second potential signal, and uploads it to the vehicle based on the change between the first potential signal and the second potential signal to inform the user that the battery is leaking. The plurality of distributed conductive members 130 can increase the probability of detecting the conductive medium, and provide better safety.

[0063] According to some embodiments of the present invention, Figure 3 As shown, the plurality of conductive members 130 are symmetrically arranged in the second direction of the tray. Specifically, the plurality of conductive members 130 are symmetrically arranged, with beautiful design, convenient processing, high probability of detecting the conductive medium, and guaranteed safety performance.

[0064] According to some embodiments of the present invention, Figure 3As shown, the conductive member 130 includes a first conductive member and a second conductive member spaced apart in the second direction of the tray; wherein the length of the tray in the second direction is S, the distance between the first conductive member and one end of the tray is S1, and the distance between the second conductive member and the other end of the tray is S2 and satisfies: 0.15<S1 / S<0.35; 0.15<S2 / S<0.35. Specifically, the total length of the tray in the second direction is S, the first conductive member and the second conductive member divide the tray into three sections in the second direction, the ratio of the distance between the first conductive member and one end of the tray to the entire length of the second direction satisfies 0.15<S1 / S<0.35, the ratio of the distance between the second conductive member and one end of the tray to the entire length of the second direction satisfies 0.15<S2 / S<0.35, the first conductive member and the second conductive member are evenly distributed in the second direction, and the distance of the conductive medium to the two conductive members is close, so that the conductive medium in the tray is detected when the conductive medium in the tray flows, thereby increasing the detection probability. In some embodiments of the present invention, a first conductive member and a second conductive member are separately disposed on both sides of the tray in the second direction, and the first conductive member and the second conductive member face the battery pack 200 .

[0065] In some embodiments of the present invention, the thickness of the conductive member 130 is d, and d satisfies 0.1 mm<d<2 mm, which is convenient for installation on the tray without affecting the thickness of the tray.

[0066] According to some embodiments of the present invention, Figure 2 As shown, the tray includes a bottom plate 111 and a frame 112. The bottom plate 111 carries the battery pack 200 and is configured as an insulating member; the frame 112 is disposed on the periphery of the bottom plate 111, and the frame 112 is configured as a grounding member. Specifically, the bottom plate 111 of the tray forms an installation space 110a for accommodating the battery pack 200, and a frame 112 is disposed on the periphery of the bottom plate 111, and the frame 112 is grounded. The frame 112 is fixedly connected to the bottom plate 111, wherein the frame 112 can be configured as a metal member, and the frame 112 is used to increase the rigidity of the tray, and the frame 112 can be connected to the vehicle body through a grounding wire to achieve grounding of the frame 112.

[0067] According to some embodiments of the present invention, Figure 2 As shown, the battery tray assembly 100 also includes a lifting lug 120. The lifting lug 120 is connected to the outer periphery of the frame 112, and the lifting lug 120 is configured as a grounding member, and the conductive member 130 is connected to the lifting lug 120. Specifically, the lifting lug 120 is disposed on the outer periphery of the frame 112, and the lifting lug 120 is provided with a fixing point for connecting the battery tray to the vehicle body, and the conductive member 130 can connect the lifting lug 120 to the battery pack 200 when a conductive medium exists in the installation space 110a. In some embodiments of the present invention, the lifting lug 120 is made of metal and can be connected to the potential of the entire vehicle to achieve grounding.

[0068] According to some embodiments of the present invention, Figure 5-Figure 6 As shown, a convex support protrusion 111a is formed on the outer periphery of the bottom plate 111, and the support protrusion 111a extends to the ear 120, so that the bottom plate 111 and the ear 120 overlap, and at least part of the conductive member 130 is arranged on the support protrusion 111a and is electrically connected to the ear 120. Specifically, the support protrusion 111a is an insulating material integrally formed with the tray, and the support protrusion 111a protrudes outward from the outer periphery of the bottom edge to facilitate the connection between the ear 120 and the bottom plate 111. At the same time, part of the conductive member 130 is arranged on the support protrusion 111a, and the conductive member 130 is exposed on the surface of the support protrusion 111a. When the support protrusion 111a overlaps the ear 120, the part of the conductive member 130 exposed from the support protrusion 111a is in contact with the ear 120 and electrically connected, so that the conductive member 130 is grounded.

[0069] In some embodiments of the present invention, Figure 6 As shown, the conductive member 130 may be composed of a conductive sheet and a conductive bolt, wherein at least a portion of the conductive sheet is located on the bottom plate 111, and a portion of the conductive sheet is adjacent to or located in the installation space 110a, and a portion of the conductive sheet extends to the support protrusion 111a, and the conductive bolt passes through the support protrusion 111a and is connected to the ear 120, and the conductive bolt is pressed against the conductive sheet and screwed to the ear 120, so that the conductive member 130 is grounded. In other embodiments of the present invention, the conductive member 130 is configured as a conductive sheet, and at least a portion of the conductive sheet is formed on the bottom wall surface of the support protrusion 111a, and when the support protrusion 111a overlaps the ear 120, the conductive sheet contacts the ear 120, so that the conductive member 130 is electrically connected to the ear 120 to achieve grounding.

[0070] According to some embodiments of the present invention, Figure 7 As shown, the bottom plate 111 includes a bottom plate body 1111, a side plate 1112 and a flange portion 1113. The side plate 1112 is disposed on the outer periphery of the bottom plate body 1111 and defines a battery pack installation space 110a with the bottom plate body 1111; the flange portion 1113 is disposed on the outer edge of the side plate 1112 and extends in a direction away from the installation space 110a, and a support protrusion 111a is formed on the flange portion 1113. Specifically, the side plate 1112 connects the bottom plate body 1111 and the flange portion 1113, the bottom plate body 1111 and the side plate 1112 define the installation space 110a, the flange portion 1113 extends along the outer edge of the side plate 1112 in a direction away from the installation space 110a, and at least a portion of the conductive member 130 can be disposed on the bottom plate body 1111, and the conductive member 130 extends along the side plate 1112 to the flange portion 1113 and contacts the support protrusion. The structure of the bottom plate 111 is arranged in this way to facilitate carrying the battery and installing the conductive member 130 .

[0071] According to some embodiments of the present invention, Figure 7 As shown, the frame 112 includes a front side beam, a rear side beam and a side beam, the front side beam and the rear side beam are respectively fixed to the front side and the rear side of the frame 112; the side beam is constructed in two and connected to the same end of the front side beam and the rear side beam. The side beam includes an outer support portion 1121 and an inner support portion 1122, the outer support portion 1121 is suitable for supporting the flange portion 1113; the height of the inner support portion 1122 is less than the height of the outer support portion 1121, and the inner support portion 1122 is located on the side of the outer support portion 1121 facing the installation space 110a, and the inner support portion 1122 is suitable for supporting the bottom plate body 1111. Specifically, the front side beam and the rear side beam are respectively arranged on the outer periphery of the flanged portion 1113 at the front side and the rear side of the bottom plate 111, and the outer support portion 1121 and the inner support portion 1122 of the side beam are arranged in sequence, the outer support portion 1121 supports the flanged portion 1113 on the side of the bottom plate 111, and the inner support portion 1122 supports the bottom plate body 1111. The outer support portion 1121 is higher than the inner support portion 1122, so that the flanged portion 1113 and the bottom plate body 1111 form a height difference, thereby defining the battery installation space 110a. The inner support portion 1122 and the outer support portion 1121 can improve the weighing capacity of the bottom plate 111, increase the rigidity of the bottom plate 111, and prevent the bottom plate 111 from deformation.

[0072] In some embodiments of the present invention, the base plate 111 and the frame 112 are bonded together by structural adhesive. The thickness of the structural adhesive can be used to control the dimensional tolerance of the frame 112. At the same time, the frame 112 has good flatness. The characteristic of the structural adhesive that can absorb the dimensional tolerance can reduce the manufacturing accuracy of the frame 112 and the base plate 111.

[0073] According to some embodiments of the present invention, Figure 7 As shown, a plurality of weight-reducing cavities 1121a extending in the front-to-back direction are formed in the outer support portion 1121, and the side wall between two adjacent weight-reducing cavities 1121a is inclined. Specifically, in order to reduce the weight of the frame 112, the interior of the outer support portion 1121 is provided with a plurality of adjacent cavities, namely, weight-reducing cavities 1121a, and the side wall between two adjacent weight-reducing cavities 1121a is inclined to increase the rigidity of the outer support portion 1121, so as to prevent the frame 112 from being deformed when an external force collides.

[0074] In some embodiments of the present invention, Figure 7As shown, the side wall inside the outer support portion 1121 divides the inside of the outer support portion 1121 into two areas, wherein the cross-section of the weight-reducing cavity 1121a adjacent to the inner support portion 1122 is triangular and has a cross-sectional area of ​​S1, and the cross-section of the weight-reducing cavity 1121a away from the inner support portion 1122 is trapezoidal and has a cross-sectional area of ​​S2. In the power battery system, the cross-sectional area S1 of the weight-reducing cavity 1121a arranged adjacent to the inner support portion 1122 has a greater influence on the power battery pack mode. The larger S1 is, the worse the stiffness of the bottom plate 111 is, the lower the mode of the whole pack is, and the greater the probability of resonance is; the cross-sectional area S2 of the weight-reducing cavity 1121a arranged away from the inner support portion 1122 has a greater influence on the collision protection of the whole vehicle. The larger S2 is, the smaller the supporting area of ​​the weight-reducing cavity 1121a away from the inner support portion 1122 is, and the smaller the energy that can be absorbed when the whole vehicle collides with external force intrusion is, and the greater the collision safety risk is. In order to achieve a balance between the whole package mode and the whole vehicle collision protection, S1 and S2 should satisfy: 0.80<S1 / S2<0.99.

[0075] In some embodiments of the present invention, Figure 7 As shown, the cross-section of the weight-reducing cavity 1121a adjacent to the inner support portion 1122 is a triangle, and the two angles defined by the side wall inside the outer support portion 1121 and the weight-reducing cavity 1121a are α and β respectively, and both α and β satisfy the angle range of 50° to 70°, and the values ​​of α and β satisfy that the cross-section of the weight-reducing cavity 1121a is an isosceles triangle, so as to improve the stability of the cross-section of the weight-reducing cavity 1121a.

[0076] According to some embodiments of the present invention, Figure 7 As shown, the bottom of the inner support part 1122 is provided with a plurality of support grooves 1122a extending in the front-to-back direction and spaced apart in the width direction, and the support grooves 1122a are located at the lower side of the bottom plate 111. Specifically, the support grooves 1122a can improve the load-bearing capacity of the inner support part 1122 so that the bottom plate 111 can withstand the battery pressure.

[0077] According to some embodiments of the present invention, a water storage tank is formed on the inner support portion 1122. Specifically, the water storage tank is suitable for temporarily storing the conductive medium in the battery pack. When the conductive medium appears inside the battery tray assembly 100, the conductive medium can flow into the water storage tank for temporary storage. The water storage tank absorbs or discharges the conductive medium, thereby reducing the conductive medium inside the battery pack, reducing the risk of leakage inside the battery pack due to the conductive medium, and improving the safety of the battery pack.

[0078] According to some embodiments of the present invention, Figure 3 , Figure 5As shown, the conductive member 130 is integrally provided with the bottom plate 111. Specifically, the conductive member 130 may be embedded in the bottom plate 111, and at least a portion of the conductive member 130 is the bottom wall of the installation space 110a, and another portion of the conductive member 130 extends out of the bottom plate 111 and contacts the frame 112 to be grounded. In some embodiments of the present invention, the conductive member 130 may be hot-pressed onto the bottom plate 111 by hot pressing to form a conductive path.

[0079] According to some embodiments of the present invention, Figure 5-Figure 6 As shown, the tray is an insulating member, and the battery tray assembly 100 further includes a conductive fastener 140. The conductive fastener 140 is configured as a grounding member, and the conductive fastener 140 is used to fasten the tray and the conductive member 130. Specifically, the conductive fastener 140 is conductive, and the conductive member 130 is electrically connected to the conductive fastener 140. The conductive fastener 140 fixes at least a portion of the conductive member 130 to the tray, which facilitates the installation of the conductive member 130. In some embodiments of the present invention, the conductive fastener 140 is a metal grounding bolt, the conductive member 130 is connected to the grounding member, i.e., the conductive fastener 140, the conductive member 130 is formed with a first mounting hole suitable for the conductive fastener 140 to pass through, and a second mounting hole suitable for the conductive fastener 140 to pass through is formed on the tray, the first mounting hole and the second mounting hole are directly opposite to each other, the conductive fastener 140 is respectively passed through the first mounting hole and the second mounting hole and is grounded, and a pressing portion with a cross-section larger than the first mounting hole is formed on the upper end of the conductive fastener 140, which is pressed against the upper surface of the conductive member 130 to achieve electrical connection between the conductive member 130 and the grounding member.

[0080] In some embodiments of the present invention, the conductive member 130 is disposed on the tray and at least partially located in the installation space 110a or adjacent to the installation space 110a. Specifically, to facilitate the conductive member 130 to contact the conductive medium in the installation space 110a, at least a portion of the conductive member 130 may be disposed in the installation space 110a and spaced apart from the battery pack 200, or, as Figure 3 As shown, the conductive member 130 is disposed on the surface of the tray and adjacent to the installation space 110a so that the conductive member 130 contacts the conductive medium. In some embodiments of the present invention, at least a portion of the conductive member 130 located in the installation space 110a is tilted or protruded to contact the conductive medium in the installation space 110a, and the tilted or protruded portion is separated from the battery pack 200. In other embodiments of the present invention, the conductive member 130 is embedded in the bottom wall or side wall of the installation space 110a, and the surface of the conductive member 130 serves as the bottom wall or side wall of the installation space 110a so that the conductive member 130 contacts the conductive medium in the installation space 110a.

[0081] In some embodiments of the present invention, Figure 3As shown, the grounding member is fixedly connected to the tray, and at least a portion of the conductive member 130 extends out of the tray and is connected to the grounding member. Specifically, since the tray is insulated and cannot conduct electricity, at least a portion of the conductive member 130 extends out of the tray and is connected to the grounding member, and the grounding member is a preset potential point. The conductive member 130 can pull the potential of the detection point of the installation space 110a to the outside of the tray, so that an equipotential body is formed between the tray and the preset potential point. When there is a conductive medium in the installation space 110a, the battery pack 200, the conductive member 130 and the preset potential point are electrically connected, which can be used to detect the potential difference between the battery pack 200 and the preset potential point.

[0082] In some embodiments of the present invention, the battery tray assembly 100 includes a tray, a grounding member, a conductive member 130, and a lug 120. The tray includes a bottom plate 111 and a frame 112, the frame 112 is formed on the periphery of the bottom plate 111, and the lug 120 is formed on the periphery of the frame 112, and both the frame 112 and the lug 120 can be used as a grounding member; the bottom plate 111 is an insulating member and forms an installation space 110a, and a battery pack 200 is arranged in the installation space 110a, and the conductive member 130 is hot-pressed to the bottom plate 111 by hot pressing to form a conductive path. The bottom plate 111 includes a bottom plate body 1111, a side plate 1112 and a flange portion 1113. The flange portion 1113 is higher than the bottom plate body 1111. The side plate 1112 is inclined and connects the bottom plate body 1111 and the flange portion 1113. A support protrusion 111a is formed on the outer periphery of the flange portion 1113. The conductive member 130 extends to the support protrusion 111a. A second mounting hole is formed on the support protrusion 111a. The frame 112 includes a front side beam, a rear side beam and a variable. The side beam includes an outer support portion 1121 and an inner support portion 1122. The outer support portion 1121 supports the flange portion 1113. The inner support portion 1122 supports the bottom plate body 1111. Two weight reduction chambers 1121a are formed in the outer support portion 1121. A water storage tank and a support groove 1122a arranged in sequence are formed in the inner support portion 1122. The portion where the conductive member 130 contacts the support protrusion 111a forms a first mounting hole, and the ear 120 forms a third mounting hole. The conductive fastener 140 passes through the three mounting holes to mount and electrically connect the conductive member 130 to the ear 120 of the tray. The conductive member 130 pulls the potential of the installation space 110a to the ear 120 to form an equipotential body. The conductive members 130 are evenly distributed on both sides of the bottom plate 111 in the length direction, with two conductive members 130 on each side, and the conductive members 130 on both sides are symmetrical.

[0083] When there is no conductive medium in the installation space 110a, the battery management system detects the potential difference between the battery pack 200 and the preset potential point and converts it into a first potential signal. When a conductive medium appears in the installation space 110a, the conductive medium will flow due to the movement of the vehicle. When the conductive medium flows between the conductive member 130 and the battery pack 200, the conductive medium connects the circuit between the battery pack 200 and the conductive member 130 and forms a new potential difference. The battery management system detects the change in the potential difference and converts it into a second potential signal. When there is a change in the first potential signal and the second potential signal, it is detected by the battery management system and uploaded to the vehicle, and finally reports that there is a conductive medium inside the battery causing leakage. At the same time, the conductive medium in the tray flows into the water tank.

[0084] The battery tray assembly 100 of the present invention is provided with a conductive member 130, which can promptly report a battery pack leakage fault when a conductive medium appears inside the installation space 110a where the battery pack 200 is installed, thereby avoiding other safety hazards.

[0085] The battery pack according to the present invention is briefly described below.

[0086] The battery pack according to the present invention includes: a battery tray, a battery pack 200 and a battery management system. The battery tray is constructed as the battery tray assembly 100 described in any one of the above embodiments; the battery pack 200 is arranged in the installation space 110a, and when there is no conductive medium in the installation space 110a, a first potential signal is formed between the battery pack 200 and a preset potential point; when there is a conductive medium in the installation space 110a, a second potential signal is formed between the battery pack 200 and the preset potential point, and the first potential signal and the second potential signal are used to indicate whether there is a conductive medium in the installation space 110a. Specifically, the battery tray forms an installation space 110a suitable for installing the battery pack 200. When there is no conductive medium in the battery pack, a first potential signal is formed between the battery pack 200 and the preset potential point. When there is a conductive medium in the battery pack, a current path is formed between the battery pack 200, the conductive medium, the conductive member 130 and the preset potential point, and the potential difference between the battery pack 200 and the preset potential point changes, thereby forming a second potential signal. Both the first potential signal and the second potential signal can be transmitted to the entire vehicle. By judging whether there is a change in the potential signal, it can be known whether there is a conductive medium in the battery pack. Since the battery pack of the present invention has the above-mentioned battery tray, the battery pack can promptly detect leakage caused by water accumulation in the battery or leakage of the electrolyte, and has good safety performance.

[0087] According to some embodiments of the present invention, Figure 2-Figure 3As shown, the battery pack also includes a battery management system. The battery management system is used to detect the potential signal between the battery pack 200 and the preset potential point to detect whether there is a conductive medium in the battery pack. When the battery pack is working normally, the potential difference detected by the battery management system is converted into a first potential signal. When there is a conductive medium in the battery pack, compared with the first potential signal, the potential difference between the battery pack 200 and the preset potential point changes, that is, the second potential signal. The battery management system will detect this change and transmit it to the entire vehicle, so that the user can promptly discover the battery pack leakage due to internal water accumulation or electrolyte leakage.

[0088] According to some embodiments of the present invention, Figure 2-Figure 3 As shown, the battery pack 200 includes a plurality of single cells 210 arranged at intervals in the second direction, and the conductive member 130 is arranged opposite to one of the single cells 210 in the first direction of the battery tray. Specifically, in order to prevent the conductive member 130 from connecting two single cells 210 and causing a short circuit after a vehicle collision, one conductive member 130 is arranged opposite to only one single cell 210 to improve the safety performance of the battery pack 200.

[0089] According to some embodiments of the present invention, Figure 3-Figure 4 As shown, the width of the single cell 210 in the battery pack 200 in the first direction is W1, and the width of the conductive member 130 in the first direction is W2, and they satisfy 0.25<W2 / W1<0.98. Specifically, the width of at least part of the conductive member 130 located in the installation space 110a is W2. Since the conductive member 130 is difficult to process if the width is too small, the ratio of W2 to W1 should satisfy 0.25<W2 / W1. If the width of the conductive member 130 is too large, it will exceed the width of the single cell 210, resulting in the conductive member 130 pulling through the adjacent single cells 210 and forming a circuit to short-circuit when the vehicle collides from the side. Therefore, the ratio of W2 to W1 should satisfy W2 / W1<0.98.

[0090] According to some embodiments of the present invention, the shell of the battery pack 200 is charged; and / or, the battery pack 200 is provided with a pole lead-out piece, which is connected to the pole of the single cell 210 and extends to the battery tray. Specifically, in order to detect whether the battery has leakage, the shell can be charged or the pole of the single cell 210 can be led out to the installation space 110a, and when a conductive medium is generated in the installation space 110a, the high-voltage circuit composed of the single cell 210 can be connected to the ground by using the conductive member 130.

[0091] In some embodiments of the present invention, Figure 1As shown, an insulation resistor R0 is provided between the battery pack 200 and the grounding member, the conductive medium is conductive and has a conductive medium resistance R1, the conductive member 130 is conductive and has a conductive member resistance R2, and the resistance value of the insulation resistor R0 is much greater than the sum of the conductive medium resistance R1 and the conductive member resistance R2. When there is no conductive medium in the battery pack 200 and the tray, there is no electrical connection between the battery pack 200 and the tray. At this time, the battery management system detects the potential difference between the two ends of R0, which is the potential difference between the battery pack 200 and the grounding member. The battery management system converts the potential difference into a first potential signal and transmits it to the vehicle. When there is a conductive medium between the battery pack 200 and the tray, the conductive medium electrically connects the battery pack 200 and the conductive member 130. At this time, the potential difference detected by the battery management system is the potential difference between the conductive medium resistance R1 and the conductive member resistance R2. Since the sum of the conductive medium resistance R1 and the conductive member resistance R2 is significantly smaller than the insulation resistance R0, the potential difference detected by the battery management system changes. The battery management system converts it into a second potential signal and transmits it to the entire vehicle, thereby alerting the user to battery pack leakage information.

[0092] The vehicle according to the present invention will be briefly described below.

[0093] The vehicle according to the present invention includes the battery pack described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the battery pack of the above embodiments, the vehicle can warn of leakage of electrolyte or accumulation of water in the battery pack, so that the user can discover it in time to avoid safety accidents.

[0094] In summary, the battery tray assembly 100 according to the present invention can promptly detect the presence of accumulated water or leaked electrolyte on the battery tray, thereby causing battery leakage. The battery pack and vehicle equipped with the battery tray assembly 100 of the present application are safer; multiple conductive members 130 are evenly distributed on the tray, which increases the probability of monitoring the conductive medium in the running vehicle and ensures driving safety; the conductive member 130 is integrally formed with the tray, and the production of the conductive member 130 and the tray can be completed by hot pressing the conductive member 130 on the existing tray structure, which is convenient for processing; the tray frame 112 is provided with an inner support portion 1122 and an outer support portion 1121, which improves the load-bearing capacity of the bottom plate 111, increases the rigidity of the bottom plate 111, avoids deformation of the bottom plate 111, and improves the overall stability of the tray assembly; the tray assembly is provided with a water storage tank to cache the conductive medium in the battery pack to prevent internal leakage of the battery pack and improve the safety of the battery pack.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0096] While embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. A battery tray assembly (100), characterized in that: include: a tray, the tray forming an installation space (110a) suitable for accommodating a battery pack (200) and the tray being insulated from the battery pack (200); a conductive member (130), the conductive member (130) being arranged on the tray and at least partially located in the installation space (110a), one end of the conductive member (130) being used to connect to a preset potential point, and the other end of the conductive member (130) being directly opposite to one of the single cells (210) in the battery pack (200); When no conductive medium exists in the installation space (110a), the conductive member is used to provide a first potential signal between the battery pack (200) and the preset potential point; When a conductive medium exists in the installation space (110a), the conductive member (130) connects the battery pack with the preset potential point through the conductive medium to provide a second potential signal between the battery pack (200) and the preset potential point; The first potential signal and the second potential signal are used to indicate whether a conductive medium exists in the installation space (110a); The tray comprises: A bottom plate (111), the bottom plate (111) carrying the battery pack (200) and configured as an insulating member; A frame (112), the frame (112) being arranged on the outer periphery of the bottom plate (111), and the preset potential point being arranged on the outer periphery of the frame (112); The preset potential point is configured as the whole vehicle ground; The tray comprises a grounding member, the grounding member is grounded, and one end of the conductive member is electrically connected to the grounding member.

2. The battery tray assembly (100) according to claim 1, characterized in that: A plurality of conductive members (130) are arranged at intervals along a second direction on both sides of the tray in a first direction; wherein the first direction is perpendicular to the second direction.

3. The battery tray assembly (100) according to claim 2, characterized in that: A plurality of conductive members are symmetrically arranged in a second direction of the tray.

4. The battery tray assembly (100) according to claim 2, characterized in that: The conductive member (130) comprises a first conductive member (130) and a second conductive member (130) which are arranged at intervals in the second direction of the tray; wherein The length of the tray in the second direction is S, the distance between the first conductive member (130) and one end of the tray is S1, the distance between the second conductive member (130) and the other end of the tray is S2 and the following conditions are satisfied: 0.15<S1 / S<0.35; 0.15<S2 / S<0.

35.

5. The battery tray assembly (100) according to claim 1, characterized in that: Also includes: A lifting ear (120), the lifting ear (120) being connected to the outer periphery of the frame (112) and being configured as the grounding member, and the conductive member (130) being connected to the lifting ear (120).

6. The battery tray assembly (100) according to claim 5, characterized in that: An outwardly protruding support protrusion (111a) is formed on the outer periphery of the bottom plate (111), the support protrusion (111a) extends to the lifting ear (120), and at least part of the conductive member (130) is disposed on the support protrusion (111a) and is electrically connected to the lifting ear (120).

7. The battery tray assembly (100) according to claim 6, characterized in that: The bottom plate (111) comprises: Base plate body (1111); a side plate (1112), the side plate (1112) being arranged on the outer periphery of the bottom plate body (1111) and defining, together with the bottom plate body (1111), an installation space (110a) for the battery pack; A flange portion (1113), the flange portion (1113) being arranged on an outer edge of the side plate (1112) and extending in a direction away from the installation space (110a), the support protrusion (111a) being formed on the flange portion (1113).

8. The battery tray assembly (100) according to claim 7, characterized in that: The frame (112) includes: A front side beam and a rear side beam, wherein the front side beam and the rear side beam are arranged opposite to each other; Side beams, the side beams are structured as two and each of the side beams is connected to the front side beam and the rear side beam, and the two side beams are respectively arranged at the two ends of the front side beam and the rear side beam; wherein, The side beam comprises: An external support portion (1121), the external support portion (1121) being suitable for supporting the flange portion (1113); An inner support portion (1122), wherein the height of the inner support portion (1122) is less than the height of the outer support portion (1121), and the inner support portion (1122) is located on a side of the outer support portion (1121) facing the installation space (110a), and the inner support portion (1122) is suitable for supporting the bottom plate body (1111).

9. The battery tray assembly (100) according to claim 8, characterized in that: A plurality of weight-reducing cavities (1121a) extending in the front-to-back direction are formed in the outer support portion (1121), and the side walls between two adjacent weight-reducing cavities (1121a) are arranged obliquely.

10. The battery tray assembly (100) according to claim 8, characterized in that: The bottom of the inner support portion (1122) is provided with a plurality of support grooves (1122a) extending in the front-to-back direction and arranged at intervals in the width direction, and the support grooves (1122a) are located at the lower side of the bottom plate (111).

11. The battery tray assembly (100) according to claim 8, characterized in that: The inner support portion (1122) is formed with a water storage tank.

12. The battery tray assembly (100) according to claim 1, characterized in that: The conductive member (130) is integrally arranged with the bottom plate (111).

13. The battery tray assembly (100) according to claim 1, characterized in that: The tray is an insulating member, and the battery tray assembly (100) further comprises: A conductive fastener (140), the conductive fastener (140) being configured as the grounding member, and the conductive fastener (140) being used to fasten the tray and the conductive member (130).

14. A battery pack, characterized in that: include: A battery tray, wherein the battery tray is constructed as the battery tray assembly according to any one of claims 1 to 13; A battery pack (200), the battery pack (200) being arranged in the installation space (110a); when no conductive medium exists in the installation space (110a), a first potential signal is formed between the battery pack (200) and the preset potential point; when a conductive medium exists in the installation space (110a), a second potential signal is formed between the battery pack (200) and the preset potential point, the first potential signal and the second potential signal being used to indicate whether a conductive medium exists in the installation space (110a).

15. The battery pack according to claim 14, characterized in that: Also includes: A battery management system, the battery management system is used to detect a potential signal between the battery pack (200) and the preset potential point, so as to detect whether there is a conductive medium in the battery pack.

16. The battery pack according to claim 14, characterized in that: The battery pack (200) comprises a plurality of single cells (210) arranged at intervals in the second direction, and the conductive member (130) is arranged opposite one of the single cells (210) in the first direction of the battery tray.

17. The battery pack according to claim 16, characterized in that: The width of the single battery cell (210) in the battery pack (200) in the first direction is W1, the width of the conductive member (130) in the first direction is W2, and 0.25<W2 / W1<0.98 is satisfied.

18. The battery pack according to claim 16, characterized in that: The shell of the battery pack (200) is charged; And / or, the battery pack (200) is provided with a pole lead-out piece, the pole lead-out piece is connected to the pole of the single battery cell (210) and extends to the battery tray.

19. A vehicle, characterized in that: A battery pack comprising any one of claims 14-18.

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