Tray assembly, battery pack and vehicle

Abstract

The utility model discloses a tray assembly, a battery pack and a vehicle. The tray assembly comprises a tray, a first conductive part and a detection part. The tray comprises a first mounting groove suitable for accommodating the distribution box and a second mounting groove suitable for accommodating the battery pack; the surface area of the bottom of the second mounting groove is larger than that of the bottom of the first mounting groove. The tray further comprises a conductive part. The conductive part is at least partially exposed at the bottom of the first mounting groove. The conductive part is suitable for being electrically connected to the whole vehicle ground. The first conductive part and the conductive part are arranged at intervals. The first conductive member is adapted to be electrically connected to the battery pack. The first conductive member is configured to electrically connect the battery pack to the conductive portion when a conductive liquid is connected between the first conductive member and the conductive portion. One end of the detection member is electrically connected to the battery pack, and the other end is electrically connected to the conductive portion. The detector is configured to detect a voltage or resistance between the battery pack and the conductive portion. The circuit structure can be simplified, and the detection accuracy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a tray assembly, a battery pack and a vehicle. Background Art

[0002] In the related art, the tray of the battery pack is made of composite materials. Composite materials have good insulation properties similar to plastics, and can play a good insulating and protective role during the operation of the battery pack. If the battery pack body is not well sealed, abnormal liquids such as water may enter and accumulate inside the tray. Abnormal liquids in the battery pack may easily cause problems such as leakage in the battery pack. In this regard, the related art sets a detector in the space of the tray suitable for installing the battery pack, so as to determine whether there is abnormal liquid in the pack body by detecting whether there is leakage.

[0003] However, the related art solves some problems by setting up a detector in the battery pack installation space. Since the battery pack installation space of the tray is large, when the amount of abnormal liquid is small and difficult to disperse to the detection point, the detector cannot detect it. When the detection point of the detector can contact the abnormal liquid, it means that the amount of abnormal liquid in the package is already large and sufficient to disperse to the corresponding detection point, thereby forming an electrical connection between the detection point and the battery pack. In this way, once the detector detects leakage, it means that the battery pack already has a high safety risk. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the utility model provides a tray assembly in a first aspect, the tray assembly comprising:

[0006] A tray, the tray comprising a first mounting groove suitable for accommodating a distribution box and a second mounting groove suitable for accommodating a battery pack, the surface area of ​​the bottom of the second mounting groove being larger than the surface area of ​​the bottom of the first mounting groove, the tray further comprising a conductive portion, the conductive portion being at least partially exposed at the bottom of the first mounting groove, the conductive portion being suitable for being electrically connected to a vehicle ground;

[0007] a first conductive member, the first conductive member being disposed corresponding to the first mounting groove, the first conductive member being spaced apart from the conductive portion, the first conductive member being suitable for being electrically connected to the battery pack, and the first conductive member being configured to electrically connect the battery pack to the conductive portion when a conductive liquid is connected between the first conductive member and the conductive portion; and

[0008] A detection member, one end of which is suitable for being electrically connected to the battery pack, and the other end of which is suitable for being electrically connected to the conductive part, and the detection member is configured to detect a voltage or a resistance between the battery pack and the conductive part.

[0009] According to the tray assembly of the first aspect of the utility model, by exposing the conductive part at the bottom of the first mounting groove, the conductive part can be conductively connected to the conductive liquid entering the first mounting groove through the conductive part. By setting a first conductive member electrically connected to the battery pack, and spacing the first conductive member and the conductive part, the battery pack and the conductive part are connected when there is conductive liquid between the first conductive member and the conductive part. Then, by setting a detection member, the voltage or insulation resistance between the battery pack and the conductive part is obtained when the first conductive member and the conductive part are conductively connected through the conductive liquid, so as to facilitate the knowledge or judgment of whether liquid enters the first mounting groove. Moreover, since the surface area of ​​the bottom of the second mounting groove is larger than the surface area of ​​the bottom of the first mounting groove, when liquid enters, a smaller amount of liquid is easier to disperse to various parts when entering the first mounting groove than entering the second mounting groove, so that the probability of liquid being detected can be higher, and then the accuracy of detection can be improved, which helps to prevent the liquid inflow situation from developing to a more serious degree. Furthermore, since the liquid is easier to spread to various parts in the first installation groove than in the second installation groove, the position accuracy requirements for the first conductive member and the exposed conductive part are reduced, which facilitates the layout of the first conductive member and the exposed conductive part. By adopting the above technical means, the structure of the detection circuit can be simplified and the accuracy of detection can be improved.

[0010] Optionally, the first conductive member includes a first electrical connection portion and a second electrical connection portion, the first electrical connection portion is spaced apart from the conductive portion, and the second electrical connection portion is adapted to be electrically connected to one of the total positive electrode and the total negative electrode of the battery pack;

[0011] The detection member includes a first detection member, one end of which is electrically connected to the second electrical connection part, the other end of which is suitable for being electrically connected to the conductive part, and the first detection member is configured to detect the voltage or resistance between the second electrical connection part and the conductive part.

[0012] Optionally, the first detection member is a first voltage detector, and the first voltage detector is suitable for detecting the voltage between the second electrical connection part and the conductive part.

[0013] Optionally, the tray assembly also includes a current limiting resistor, one end of which is electrically connected to the second electrical connection portion, and the other end of the current limiting resistor is suitable for being electrically connected to the total positive electrode of the battery pack, so that the current limiting resistor is connected in series between the first conductive member and the total positive electrode of the battery pack.

[0014] Optionally, the detection member also includes a second detection member, one end of which is electrically connected to the other of the total positive electrode and the total negative electrode of the battery pack, and the other end of the second detection member is suitable for being electrically connected to the conductive part, and the second detection member is configured to detect the voltage or resistance between the other of the total positive electrode and the total negative electrode and the conductive part.

[0015] Optionally, the second detection member is a second voltage detector, which is suitable for detecting the voltage between the other of the total positive electrode and the total negative electrode and the preset potential point.

[0016] Optionally, the tray comprises:

[0017] a metal layer constituting the conductive portion; and

[0018] An insulating layer, wherein the insulating layer is attached to a surface of the metal layer along the thickness direction, the insulating layer located at the bottom of the first mounting groove is provided with a notch, the notch penetrates the insulating layer, the insulating layer is closer to the interior of the battery pack than the metal layer when the tray is installed to the battery pack, and the notch is arranged along the thickness direction corresponding to the first conductive member.

[0019] Optionally, a dimension of the notch perpendicular to the thickness direction is less than or equal to 20 mm.

[0020] Optionally, the tray assembly further comprises an insulating fixing member, the insulating fixing member is configured as an electrically insulating structure, the insulating fixing member is located in the first mounting groove and connected to the tray;

[0021] The first conductive member is connected to the insulating fixing member.

[0022] Optionally, in a direction intersecting with a thickness direction of the tray, the first conductive member and the exposed conductive portion are spaced apart from each other.

[0023] Optionally, in a direction intersecting with a thickness direction of the tray, a distance between the first conductive member and the exposed conductive portion ranges from 5 mm to 100 mm.

[0024] Optionally, in the thickness direction of the tray, the distance between the first conductive member and the bottom of the first mounting groove does not exceed 2 mm.

[0025] Optionally, the tray assembly further comprises:

[0026] a second conductive member, the second conductive member being disposed on the tray and at least partially located in the second mounting groove, the second conductive member being electrically connected to the conductive portion; and

[0027] A resistor is conductively connected to the second conductive member.

[0028] Optionally, the tray assembly further comprises:

[0029] A conductive fastener is fastened to the second conductive member, the tray, and the resistor, and is configured to electrically connect the second conductive member, the conductive portion, and the resistor.

[0030] A second aspect of the present invention provides a battery pack, the battery pack comprising:

[0031] Batteries; and

[0032] The tray assembly described above comprises a second mounting groove, wherein the second mounting groove accommodates the battery pack and the battery pack is insulated from the tray, and the first conductive member is electrically connected to the total positive electrode of the battery pack.

[0033] According to the battery pack of the second aspect of the utility model, by applying the above-mentioned tray assembly, the structure of the detection circuit can be simplified, and a small amount of incoming liquid can be accurately checked in the first installation groove of the tray, which is beneficial to improving the accuracy of detection and the safety of the battery pack.

[0034] Optionally, the battery pack further includes a distribution box, the distribution box is accommodated in the first mounting slot of the tray, the distribution box includes a control device, and the control device is communicatively connected to the detection member.

[0035] A third aspect of the utility model provides a vehicle, the vehicle comprising:

[0036] The tray assembly as above; or

[0037] The above-mentioned battery pack,

[0038] The first mounting groove of the tray is located at an end of the tray in the front-rear direction of the vehicle.

[0039] According to the vehicle of the third aspect of the utility model, by applying the above-mentioned tray assembly or the above-mentioned battery pack, and arranging the first installation groove at the end of the tray along the front-rear direction of the vehicle, since the front and rear ends of the battery pack are more likely to contact liquids such as water than other parts during the driving of the vehicle, that is, the front and rear ends of the battery pack are more likely to have liquid ingress problems. Therefore, by detecting the liquid ingress situation in the first installation groove, the further development of the liquid ingress accident can be effectively prevented, thereby helping to protect the safety of the battery pack and the vehicle's electricity use. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0041] Figure 1 It is a schematic diagram of a tray assembly according to a preferred embodiment of the utility model when applied to a battery pack;

[0042] Figure 2 is a structural schematic diagram of a pallet according to a preferred embodiment of the utility model; and

[0043] Figure 3 It is a partial schematic diagram of a pallet according to another preferred embodiment of the utility model.

[0044] Description of reference numerals:

[0045] 10: Conductive liquid 100: Tray

[0046] 101: first installation slot 102: second installation slot

[0047] 103: Metal layer 104: Insulation layer

[0048] 104a: Notch 110: First conductive element

[0049] 120: Inspection piece 121: First inspection piece

[0050] 122: Second detection element 130: Current limiting resistor

[0051] 140: Insulation fixing member 150: Battery pack

[0052] 151: Total positive electrode 152: Total negative electrode

[0053] 161: Second conductive member 162: Conductive fastener

[0054] 163: Resistor D1: Length direction

[0055] D2: Width direction D3: Thickness direction DETAILED DESCRIPTION

[0056] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0057] In order to fully understand the implementation of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the implementation of the present invention is not limited to the specific details familiar to those skilled in the art.

[0058] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention, and the singular forms "a", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the features, integral bodies, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or combinations thereof.

[0059] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0060] The "parallel" / "vertical" and similar expressions used in the present invention include an absolute parallel / vertical relationship and a roughly parallel / vertical relationship (for example, a relationship that differs from absolute parallel / vertical by -5° to +5°), which can have the same effect.

[0061] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and are not intended to limit the present invention.

[0062] The tray of the battery pack in the related art is made of composite materials. The composite material has good insulation similar to plastic, and can play a good insulating and protective role during the operation of the battery pack. The tray here may include a metal cavity and an insulating layer. The insulating layer is attached to the surface of the tray that is suitable for facing the inside of the battery pack. The insulating layer is used to realize conductive isolation between the battery pack and the distribution box and the metal cavity. The metal cavity is used to ensure the structural strength and anti-electromagnetic interference performance of the battery pack shell. If the body of the battery pack is not well sealed, water will enter and accumulate inside the tray. In this regard, the related art sets a detector in the space of the tray suitable for installing the battery pack to determine whether there is abnormal liquid in the package by detecting whether there is leakage in the battery pack installation space. Specifically, the battery pack of the battery pack forms a high-voltage circuit, and a potential signal is formed between the high-voltage circuit and the grounding part. The potential signal detected by the detector is the potential signal of the circuit formed by the high-voltage circuit, the grounding part and the detector. When the battery pack is operating normally, the potential signal is a working potential signal, and when there is abnormal liquid in the battery pack, the potential signal is a fault potential signal. The detector detects the potential signal in real time and makes a judgment on the potential signal. When the detector detects that the potential signal is a fault potential signal, it determines that the battery pack is leaking.

[0063] The inventor of the utility model discovered that the installation space of the battery pack on the tray is large. When the amount of abnormal liquid is small and difficult to disperse to the detection point, the detector cannot detect it. When the detection point of the detector can contact the abnormal liquid, it means that the amount of abnormal liquid in the package is already large. In this way, once the detector detects leakage, it means that the battery pack already has a high safety risk.

[0064] In order to solve the above defects, the embodiment of the utility model provides a battery tray 100 assembly, a battery pack and a vehicle. The tray assembly includes a tray 100 and an electrical assembly for detecting liquid ingress. The electrical assembly here can be part of a battery management system. The battery pack includes a tray assembly. The vehicle can be a pure electric vehicle, an extended-range vehicle, or other vehicle that requires a battery pack.

[0065] The following will refer to Figure 1 , Figure 2 as well as Figure 3 The illustrated example illustrates in detail the tray assembly, the battery pack and the vehicle according to the present invention.

[0066] The tray assembly according to the utility model may include a tray 100, a first conductive member 110 and a detection member 120. The tray 100 may include a first mounting groove 101 suitable for accommodating a distribution box (not shown) and a second mounting groove 102 suitable for accommodating a battery pack 150. The surface area of ​​the bottom of the second mounting groove 102 is greater than the surface area of ​​the bottom of the first mounting groove 101. The tray 100 may also include a conductive portion suitable for conducting electricity (i.e., the metal layer 103 in the figure). The conductive portion is at least partially exposed at the bottom of the first mounting groove 101. The conductive portion is suitable for being electrically connected to a preset potential point. The preset potential point here can be understood as a ground potential point or a vehicle ground. The first conductive member 110 is arranged corresponding to the first mounting groove 101. The first conductive member 110 is arranged at intervals from the conductive portion. The first conductive member 110 is suitable for being electrically connected to the battery pack 150. The first conductive member 110 is configured to electrically connect the battery pack 150 to the conductive portion when a conductive liquid 10 is connected between the first conductive member 110 and the conductive portion. One end of the detection member 120 is adapted to be electrically connected to the battery pack 150. The other end of the detection member 120 is adapted to be electrically connected to the conductive portion. The detection member 120 is configured to detect a voltage or resistance between the battery pack 150 and the conductive portion.

[0067] According to the tray assembly of the utility model, the conductive part is exposed at the bottom of the first installation groove 101, so that the conductive part can be conductively connected to the conductive liquid 10 entering the first installation groove 101. The first conductive member 110 is set to be electrically connected to the battery pack 150, and the first conductive member 110 is set to be spaced apart from the conductive part, so that the battery pack 150 and the conductive part are connected when the conductive liquid 10 exists between the first conductive member 110 and the conductive part. Then, the detection member 120 is set to obtain the voltage or resistance between the battery pack 150 and the conductive part when the first conductive member 110 and the conductive part are conductively connected through the conductive liquid 10, so as to facilitate the knowledge or judgment of whether the first installation groove 101 has liquid. Moreover, since the surface area of ​​the bottom of the second mounting groove 102 is greater than the surface area of ​​the bottom of the first mounting groove 101, when liquid inflow occurs, a smaller amount of liquid is more easily dispersed to various parts when entering the first mounting groove 101 than when entering the second mounting groove 102, thereby making it possible to increase the probability of liquid being detected, thereby improving the accuracy of detection, and then helping to prevent the liquid inflow situation from developing to a more serious degree. Furthermore, since the liquid is more easily dispersed to various parts in the first mounting groove 101 than in the second mounting groove 102, the requirements for the position accuracy of the first conductive member 110 and the exposed conductive part are reduced, which facilitates the layout of the first conductive member 110 and the exposed conductive part. By adopting the above-mentioned technical means, the structure of the detection circuit can be simplified and the accuracy of detection can be improved.

[0068] See also Figure 2For example, the dimension of the tray 100 along the length direction D1 is greater than the dimension along the width direction D2. The length direction D1 is perpendicular to the width direction D2. The first mounting groove 101 is located at the end of the tray 100 along the length direction D1. When the tray 100 is installed on the vehicle, the length direction D1 of the tray 100 is parallel to or nearly parallel to the front-rear direction of the vehicle. The width direction D2 of the tray 100 is parallel to or nearly parallel to the width direction D2 or the left-right direction of the vehicle. When the vehicle is traveling on a road section with water, the end of the tray 100 along the length direction D1 is more likely to contact splashing water or other liquids than the end in the width direction D2, so that the end of the tray 100 along the length direction D1 has a greater risk of liquid ingress. Here, by setting the first mounting groove 101 at the end of the tray 100 along the length direction D1, the accuracy of liquid detection can be effectively improved, thereby improving the safety of the battery pack.

[0069] See also Figure 1 For example, the first conductive member 110 may include a first electrical connection portion and a second electrical connection portion. The first electrical connection portion is spaced apart from the conductive portion. The second electrical connection portion is suitable for being electrically connected to one of the total positive electrode 151 and the total negative electrode 152 of the battery pack 150. The detection member 120 may include a first detection member 121. One end of the first detection member 121 is electrically connected to the second electrical connection portion. The other end of the first detection member 121 is suitable for being electrically connected to a preset potential point. The first detection member 121 is configured to detect a voltage or resistance between the second electrical connection portion and the conductive portion. Here, the voltage or insulation resistance between the second electrical connection portion and the conductive portion is detected by the first detection member 121 to monitor whether liquid is inflowing. When the voltage or resistance between the second electrical connection portion and the conductive portion detected by the first detection member 121 is abnormal, it can be characterized that there is abnormal liquid in the tray 100. Among them, the first electrical connection portion and the second electrical connection portion can be spaced apart.

[0070] Furthermore, the first detection member 121 is a first voltage detector. The first voltage detector is suitable for detecting the voltage between the second electrical connection portion and the conductive portion. It is more convenient to detect the voltage to characterize whether there is liquid in the first mounting groove 101 of the tray 100. The voltage detected by the first voltage detector here can be transmitted to the control device in the distribution box, so that the control device can analyze and determine whether the voltage detected by the first voltage detector is abnormal, and can issue an alarm message when it is determined that there is an abnormality.

[0071] Continue reading Figure 1In addition, the tray assembly may further include a current limiting resistor 130. One end of the current limiting resistor 130 is electrically connected to the second electrical connection portion. The other end of the current limiting resistor 130 is suitable for being electrically connected to the total positive electrode 151 of the battery pack 150. When the current limiting resistor 130 is connected to the battery pack 150, the current limiting resistor 130 is connected in series between the first conductive member 110 and the total positive electrode 151 of the battery pack 150. The current limiting resistor 130 is used to limit the current in the circuit when the total positive electrode 151 of the battery pack 150, the first conductive member 110, the tray 100 and the conductive member form a conductive circuit. If the current limiting resistor 130 is not provided, when liquid inflow occurs, the impedance of the conductive circuit formed by the total positive electrode 151 of the battery pack 150, the first conductive member 110, the tray 100 and the conductive member is small, which can easily cause an arcing fire accident. The additional addition of the current limiting resistor 130 here is equivalent to increasing the resistance value of the conductive loop, which is safer. At the same time, due to the series current limiting resistor 130, even if a large amount of liquid overlaps, the loop current is very small, which greatly reduces the risk of thermal runaway.

[0072] See also Figure 1 For example, the first conductive member 110 is spaced apart from the exposed conductive portion in a direction intersecting the thickness direction D3 of the tray 100. Here, the first conductive member 110 is spaced apart from the exposed conductive portion to ensure that the first conductive member 110 is disconnected from the exposed conductive portion when no liquid enters.

[0073] Further, the distance d between the first conductive member 110 and the exposed conductive portion may range from 5 mm to 100 mm in the direction intersecting the thickness direction D3 of the tray 100. It is understood that the first conductive member 110 may be arranged in a circular area with the exposed conductive portion as the center and d as the radius.

[0074] See also Figure 1 For example, in the thickness direction D3 of the tray 100, the distance between the first conductive member 110 and the bottom of the first mounting groove 101 is less than or equal to 2 mm. The first conductive member 110 here can be closely attached to the unexposed conductive portion of the inner bottom of the first mounting groove 101. This ensures that a small amount of liquid can contact the first conductive member 110 and thus be detected.

[0075] See also Figure 1In addition, the detection member 120 may further include a second detection member 122. One end of the second detection member 122 is electrically connected to the other of the total positive electrode 151 and the total negative electrode 152 of the battery pack 150. The other end of the second detection member 122 is suitable for being electrically connected to the conductive part. The second detection member 122 is configured to detect the voltage or insulation resistance between the other of the total positive electrode 151 and the total negative electrode 152 and the conductive part. Here, by setting the second detection member 122 to detect the voltage or resistance between the other of the total positive electrode 151 and the total negative electrode 152 of the battery pack 150 and the conductive part, it can cooperate with the first detection member 121 to detect whether there is an abnormality in the voltage or resistance between the battery pack 150 and the conductive part. This can improve the reliability and accuracy of the detection results.

[0076] For example, the second detection member 122 is a second voltage detector. The second voltage detector is suitable for detecting the voltage between the other of the total positive electrode 151 and the total negative electrode 152 and the conductive part. The voltage detected by the first voltage detector here can be transmitted to the control device in the distribution box, so that the control device analyzes and determines whether the voltage detected by the second voltage detector is abnormal, and can issue an alarm message when it is determined that there is an abnormality.

[0077] In some examples, the control device of the distribution box can obtain the voltage detected by the first voltage detector and the second voltage detector, and calculate the sum of the voltages at the two locations, thereby determining whether there is an abnormality, thereby indicating whether there is liquid ingress.

[0078] In other examples, the control device of the distribution box can obtain the voltage detected by the first voltage detector and the second voltage detector, and calculate the insulation resistance between the total positive electrode 151 and the total negative electrode 152 of the battery pack 150. It is judged whether liquid ingress exists based on whether the insulation resistance is within the corresponding range. For example, under normal circumstances, the resistance between the total positive electrode 151 and the total negative electrode 152 of the battery pack 150 is in the megaohm level. If it is lower than the megaohm level, it can be indicated that liquid ingress exists.

[0079] See also Figure 1For example, the tray 100 may include a metal layer 103 and an insulating layer 104. The metal layer 103 constitutes the above-mentioned conductive portion. The insulating layer 104 is attached to a surface of the metal layer 103 along the thickness direction D3. The insulating layer 104 located at the bottom of the first mounting groove 101 is provided with a notch 104a. The notch 104a penetrates the insulating layer 104. The insulating layer 104 is closer to the inside of the battery pack than the metal layer 103 when the tray 100 is installed to the battery pack. The notch 104a is arranged corresponding to the first conductive member 110 along the thickness direction D3. The thickness direction D3 here can also be understood as the height direction of the tray 100 or the battery pack. When the battery pack is installed to the vehicle, the thickness direction D3 of the tray 100 is also the height direction of the vehicle. The portion of the metal layer 103 exposed in the notch 104a is used to contact the liquid entering the first mounting groove 101. When the liquid contacts both the first conductive member 110 and the metal layer 103 , the circuit formed by the total positive electrode 151 of the battery pack 150 , the first conductive member 110 , the tray 100 , and the conductive portion is connected.

[0080] Optionally, the dimension of the notch 104a in the direction perpendicular to the thickness direction D3 is less than or equal to 20 mm, that is, the radius of the notch 104a is less than or equal to 10 mm.

[0081] See also Figure 1 In addition, the tray assembly may further include an insulating fixture 140. The insulating fixture 140 may be configured as an electrically insulated structure. The insulating fixture 140 is located in the first mounting groove 101 and connected to the tray 100. The first conductive member 110 is connected to the insulating fixture 140. Here, the first conductive member 110 is installed by the insulating fixture 140, so that a short circuit between the first conductive member 110 and the tray 100 can be prevented.

[0082] For example, the insulating fixing member 140 may be an insulating block or an insulating column made of an insulating material such as nylon.

[0083] See also Figure 1 For example, the first conductive member 110 may be configured as a probe. The length direction of the probe intersects the length direction D1 and the width direction D2 of the tray 100. For example, the length direction of the probe may be parallel to or nearly parallel to the thickness direction D3 of the tray 100.

[0084] exist Figure 1 In the example shown, the first conductive member 110 is a probe. The probe is arranged in an upright position. The upper end of the probe can be understood as the above-mentioned second electrical connection portion. Correspondingly, the lower end of the probe can be understood as the first electrical connection portion.

[0085] See also Figure 2 and Figure 3In addition, the tray assembly may further include a second conductive member 161, a resistor and a third detection member (not shown). The second conductive member 161 is disposed on the tray and is at least partially located in the second mounting groove 102. The resistor 163 is conductively connected to the second conductive member 161. The resistor 163 can be understood as another current limiting resistor. The third detection member is electrically connected to the second conductive member 161 and the conductive portion to detect the voltage or resistance between the second conductive member 161 and the conductive portion. When there is a conductive liquid in the second mounting groove 102, the second conductive member 161 conducts the battery pack 150 with the conductive portion through the conductive liquid, thereby causing the potential difference between the battery pack 150 and the conductive portion to change. It can be known that the second mounting groove 102 is influent. By providing the resistor 163, the resistance between the battery pack 150 and the conductive portion when the second conductive member 161 and the conductive portion are connected can be increased, and arcing and fire between the second resistor 163 and the conductive portion when there is a conductive liquid in the second mounting groove 102 can be avoided, thereby preventing the battery pack from failing. In short, this technical means is usually used to display an alarm message when there is conductive liquid in the second installation groove 102, and to prevent arcing and fire between the second conductive member 161 and the conductive part when the conductive liquid is connected between the second conductive member 161 and the conductive part, thereby improving the safety of the battery pack.

[0086] In other words, by adding a resistor, even if there is conductive liquid in the battery pack, arcing and ignition will not occur due to the conduction between the second conductive member 161 and the conductive part. The reason is that this embodiment increases the impedance of the second conductive member 161 and the conductive part during the liquid lap process, so that the current during the liquid lap alarm is controlled below the threshold of arcing and ignition.

[0087] See also Figure 3 Further, the tray assembly may further include a conductive fastener 162. The conductive fastener 162 is fastened to the second conductive member 161, the tray, and the resistor. The conductive fastener 162 is configured to be able to conduct electricity through the second conductive member 161, the conductive portion, and the resistor 163. By providing the conductive fastener 162, the second conductive member 161 and the resistor 163 can be fastened to the tray.

[0088] Optionally, the resistance value of the resistor 163 ranges from 200Ω to 2000Ω. The conductive fastener 162 may be a fastener such as a bolt. The resistor 163 may not be limited to materials such as metal alloys, organic coatings, and chip resistors. The design of the resistor 163 may include but is not limited to gaskets, connecting sheets, resistors welded to a preset exposed conductive portion, and the like.

[0089] See also Figures 1 to 3The utility model also provides a battery pack. The battery pack may include a battery pack 150 and the above-mentioned tray assembly. The tray 100 may include a second mounting groove 102. The second mounting groove 102 accommodates the battery pack 150 and the battery pack 150 is insulated from the tray 100. The first conductive member 110 is electrically connected to the total positive electrode 151 of the battery pack 150.

[0090] According to the battery pack of the present invention, by applying the above-mentioned tray assembly, the structure of the detection circuit can be simplified, and a small amount of incoming liquid can be accurately checked in the first installation groove of the tray, which is beneficial to improving the accuracy of detection and the safety of the battery pack.

[0091] In addition, the battery pack may further include a distribution box (not shown). The distribution box is accommodated in the first installation slot 101 of the tray 100. The distribution box may include a control device (not shown). The control device is communicatively connected to the detection member 120.

[0092] Optionally, the control device may be a microcontroller unit (MCU).

[0093] The utility model further provides a vehicle. The vehicle may include the above-mentioned tray assembly or the above-mentioned battery pack. The first mounting slot 101 of the tray 100 is located at the end of the tray 100 in the front-rear direction of the vehicle.

[0094] According to the vehicle of the utility model, by applying the above-mentioned tray assembly or the above-mentioned battery pack, and arranging the first installation slot at the end of the tray along the front-rear direction of the vehicle, since the front and rear ends of the battery pack are more likely to contact liquids such as water than other parts during the driving of the vehicle, that is, the front and rear ends of the battery pack are more likely to have liquid ingress problems. Therefore, by detecting the liquid ingress situation in the first installation slot, the further development of the liquid ingress accident can be effectively prevented, thereby helping to protect the safety of the battery pack and the vehicle's electricity use.

[0095] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0096] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A tray assembly, characterized in that: The tray assembly comprises: A tray, the tray comprising a first mounting groove suitable for accommodating a distribution box and a second mounting groove suitable for accommodating a battery pack, the surface area of ​​the bottom of the second mounting groove being larger than the surface area of ​​the bottom of the first mounting groove, the tray further comprising a conductive portion, the conductive portion being at least partially exposed at the bottom of the first mounting groove, the conductive portion being suitable for being electrically connected to a vehicle ground; a first conductive member, the first conductive member being disposed corresponding to the first mounting groove, the first conductive member being spaced apart from the conductive portion, the first conductive member being suitable for being electrically connected to the battery pack, and the first conductive member being configured to electrically connect the battery pack to the conductive portion when a conductive liquid is connected between the first conductive member and the conductive portion; and A detection member, one end of which is suitable for being electrically connected to the battery pack, and the other end of which is suitable for being electrically connected to the conductive part, and the detection member is configured to detect a voltage or a resistance between the battery pack and the conductive part.

2. The tray assembly according to claim 1, characterized in that: The first conductive member includes a first electrical connection portion and a second electrical connection portion, the first electrical connection portion is spaced apart from the conductive portion, and the second electrical connection portion is adapted to be electrically connected to one of the total positive electrode and the total negative electrode of the battery pack; The detection member includes a first detection member, one end of which is electrically connected to the second electrical connection part, the other end of which is suitable for being electrically connected to the conductive part, and the first detection member is configured to detect the voltage or resistance between the second electrical connection part and the conductive part.

3. The tray assembly according to claim 2, characterized in that: The first detection member is a first voltage detector, and the first voltage detector is suitable for detecting a voltage between the second electrical connection portion and the conductive portion.

4. The tray assembly according to claim 2, characterized in that: The tray assembly also includes a current limiting resistor, one end of which is electrically connected to the second electrical connection portion, and the other end of which is suitable for being electrically connected to the total positive electrode of the battery pack, so that the current limiting resistor is connected in series between the first conductive member and the total positive electrode of the battery pack.

5. The tray assembly according to claim 2, characterized in that: The detection member also includes a second detection member, one end of which is electrically connected to the other of the total positive electrode and the total negative electrode of the battery pack, and the other end of the second detection member is electrically connected to the conductive part, and the second detection member is configured to detect the voltage or resistance between the other of the total positive electrode and the total negative electrode and the conductive part.

6. The tray assembly according to claim 5, characterized in that: The second detection member is a second voltage detector, which is suitable for detecting a voltage between the other of the total positive electrode and the total negative electrode and the conductive part.

7. The tray assembly according to any one of claims 1 to 6, characterized in that: The tray comprises: a metal layer constituting the conductive portion; and An insulating layer, wherein the insulating layer is attached to a surface of the metal layer along the thickness direction, the insulating layer located at the bottom of the first mounting groove is provided with a notch, the notch penetrates the insulating layer, the insulating layer is closer to the interior of the battery pack than the metal layer when the tray is installed to the battery pack, and the notch is arranged along the thickness direction corresponding to the first conductive member.

8. The tray assembly according to claim 7, characterized in that: The dimension of the notch perpendicular to the thickness direction is less than or equal to 20 mm.

9. The tray assembly according to any one of claims 1 to 6, characterized in that: The tray assembly further includes an insulating fixing member, the insulating fixing member being located in the first mounting groove and connected to the tray; The first conductive member is connected to the insulating fixing member.

10. The tray assembly according to any one of claims 1 to 6, characterized in that: In a direction intersecting with the thickness direction of the tray, the first conductive member is spaced apart from the exposed conductive portion.

11. The tray assembly according to claim 10, characterized in that: In a direction intersecting with the thickness direction of the tray, a distance between the first conductive member and the exposed conductive portion ranges from 5 mm to 100 mm.

12. The tray assembly according to any one of claims 1 to 6, characterized in that: In the thickness direction of the tray, a distance between the first conductive member and the bottom of the first mounting groove is less than or equal to 2 mm.

13. The tray assembly according to any one of claims 1 to 6, characterized in that: The tray assembly further comprises: a second conductive member, the second conductive member being disposed on the tray and at least partially located in the second mounting groove, the second conductive member being electrically connected to the conductive portion; and A resistor is conductively connected to the second conductive member.

14. The tray assembly according to claim 13, characterized in that: The tray assembly further comprises: A conductive fastener is fastened to the second conductive member, the tray, and the resistor, and is configured to electrically connect the second conductive member, the conductive portion, and the resistor.

15. A battery pack, characterized in that: The battery pack comprises: Batteries; and According to the tray assembly according to any one of claims 1 to 14, the tray comprises a second mounting groove, the second mounting groove accommodates the battery pack and the battery pack is insulated from the tray, and the first conductive member is electrically connected to the total positive electrode of the battery pack.

16. The battery pack according to claim 15, characterized in that: The battery pack further includes a distribution box, which is accommodated in the first mounting slot of the tray. The distribution box includes a control device, which is communicatively connected to the detection member.

17. A vehicle, characterized in that: The vehicle comprises: A tray assembly according to any one of claims 1 to 14; or The battery pack according to claim 15 or 16, The first mounting groove of the tray is located at an end of the tray in the front-rear direction of the vehicle.

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