Tray of battery pack, battery pack and vehicle

Abstract

The utility model provides a tray of a battery pack, the battery pack and a vehicle. The tray is provided with a first containing cavity and a gas collecting cavity, the tray comprises a first frame, the first frame is provided with a gas inlet communicated with the gas collecting cavity, and the first containing cavity comprises a battery area used for containing a battery pack and a flow guide area located on at least one side of the battery area. And the flow guide area is communicated with the gas inlet. The tray further comprises a first whole package anti-explosion valve arranged on the first frame, the first whole package anti-explosion valve is communicated with the gas collecting cavity, and an inlet of the first whole package anti-explosion valve is opposite to the gas inlet. According to the tray of the battery pack, the first whole pack anti-explosion valve can be conveniently opened at a proper time, internal gas is timely exhausted, the safety of the battery pack is guaranteed, and the safety risk caused by too high internal pressure is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a battery pack tray, a battery pack and a vehicle. BACKGROUND

[0002] In the field of electric vehicle technology, the battery pack plays a decisive role in the performance, safety and range of the vehicle.

[0003] The electrolyte inside the battery cell has electrical conductivity. When the battery pack experiences thermal runaway, the battery cell explosion-proof valve will spray high-temperature gas containing electrolyte vapor and other chemical substances. The high-temperature gas has electrical conductivity and corrosiveness, which can easily cause internal short circuit and insulation failure of the battery pack, and even cause combustion or explosion. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a battery pack tray, a battery pack and a vehicle.

[0005] The first aspect of the present application provides a battery pack tray, which is provided with a first accommodating cavity and a gas collection cavity; the tray comprises a first frame, the first frame is provided with a gas inlet communicating with the gas collection cavity; the first accommodating cavity comprises a battery area for accommodating a battery pack and a flow guide area located on at least one side of the battery area; the flow guide area communicates with the gas inlet;

[0006] The tray further comprises a first whole-pack explosion-proof valve arranged on the first frame, the first whole-pack explosion-proof valve communicates with the gas collection cavity, and the inlet of the first whole-pack explosion-proof valve is arranged opposite to the gas inlet.

[0007] In one embodiment, the area of the gas inlet is greater than the area of the inlet of the first whole-pack explosion-proof valve.

[0008] In one embodiment, the tray is provided with a second accommodating cavity located on one side of the first accommodating cavity, and the tray further comprises a first partition plate located in the second accommodating cavity, which divides the second accommodating cavity into an electrical area for accommodating a battery management module and the gas collection cavity.

[0009] In one embodiment, the tray further comprises a second partition plate located between the first accommodating cavity and the second accommodating cavity; the first frame, the first partition plate and the second partition plate enclose the gas collection cavity.

[0010] In one embodiment, the first frame is internally provided with a flow guide channel communicating with the gas collection cavity, and the flow guide channel respectively communicates with the gas inlet and the flow guide area.

[0011] In one embodiment, the flow guide area includes a first end and a second end opposite in length direction, and the second end is located on a side of the first end away from the first frame; the flow guide inlet of the flow guide channel is located on a side of the flow guide area where the first end is located.

[0012] In one embodiment, the flow guide area includes a first end and a second end opposite in length direction; the tray further includes a second frame, the second frame is located on a side of the second end away from the first end, and the second frame is provided with a second whole-pack explosion-proof valve, the second whole-pack explosion-proof valve is in communication with the flow guide area, and an inlet of the second whole-pack explosion-proof valve is arranged opposite to the flow guide area.

[0013] The second aspect of the present application provides a battery pack, which includes a battery group and the tray of the battery pack described above, and the battery group is arranged in the battery area; the battery group includes battery cells and battery cell explosion-proof valves, and the battery cell explosion-proof valves are all directed to the flow guide area.

[0014] In one embodiment, when the tray includes two battery areas, the battery pack includes two battery groups, and each battery group is arranged in one battery area; the battery cell explosion-proof valve of each battery group is directed to the flow guide area adjacent to the battery group.

[0015] The third aspect of the present application provides a vehicle, which includes the battery pack described above.

[0016] The tray of the battery pack provided by the embodiments of the present application includes a battery area, when a battery group in the battery area uncontrollably sprays out high-temperature gas, the gas first enters a flow guide area, and under the guidance of the flow guide area, the gas enters a gas collection cavity through a gas inlet. A first whole-pack explosion-proof valve is arranged on a first frame and is in communication with the gas collection cavity, an inlet of the first whole-pack explosion-proof valve is arranged opposite to the gas inlet, and based on the gas flow characteristics, when high-temperature gas enters the gas collection cavity, the flow direction of the gas changes after the gas impacts the inner wall of the gas collection cavity, so that the gas can flow towards the inlet of the first whole-pack explosion-proof valve, thereby facilitating the first whole-pack explosion-proof valve to open at a suitable time and timely discharge the gas inside, ensuring the safety of the battery pack and reducing the safety risk caused by excessively high internal pressure.

[0017] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings incorporated into the specification and forming a part thereof illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0019] Figure 1A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1.

[0020] Figure 2 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1. Figure 1 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1.

[0021] Figure 3 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1. Figure 1 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1.

[0022] Figure 4 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1. Figure 1 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1.

[0023] Figure 5 A structural schematic diagram of a battery pack provided by an embodiment of the present application is shown in FIG. 1. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments (or, the implementation manners) of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0025] If the embodiments of the present application involve directional indications or positional relationships (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such directional indications or positional relationships are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms “first”, “second”, etc. in the embodiments of the present application are only used for the convenience of description, and cannot be understood as indicating or implying relative importance.

[0026] The tray of the battery pack, the battery pack, and the vehicle of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. The features in the following embodiments and implementation manners can be complementary or combined with each other without conflict.

[0027] The embodiments of the present application provide a tray of a battery pack, as shown in FIG. 1, the tray 100 is provided with a first accommodating cavity 10 and a gas collection cavity 111. The tray 100 includes a first frame 20, the first frame 20 is provided with a gas inlet 201 in communication with the gas collection cavity 111, the first accommodating cavity 10 includes a battery area 101 for accommodating a battery pack 200 and a flow guide area 102 located at least one side of the battery area 101, the flow guide area 102 is in communication with the gas inlet 201. Figures 1 to 3

[0028] ​The tray 100 further comprises a first whole-pack explosion-proof valve 30 arranged at the first frame 20, the first whole-pack explosion-proof valve 30 being in communication with the gas collection cavity 111, and an inlet 301 of the first whole-pack explosion-proof valve 30 being arranged opposite to the gas inlet 201.

[0029] When the battery pack 200 is in thermal runaway, the battery pack will spew out high-temperature gas and electrolyte and other substances, thereby causing adverse effects on other components in the battery pack or battery pack. The tray 100 of the battery pack of the present application comprises a battery area 101, when the battery pack 200 in the battery area 101 is in thermal runaway and spews out high-temperature gas, the gas first enters the flow guide area 102, under the guidance of the flow guide area 102, the gas enters the gas collection cavity 111 through the gas inlet 201. The first whole-pack explosion-proof valve 30 is arranged at the first frame 20 and is in communication with the gas collection cavity 111, the inlet of the first whole-pack explosion-proof valve 30 is arranged opposite to the gas inlet 201, based on the gas flow characteristics, when high-temperature gas enters the gas collection cavity 111, the flow direction of the gas changes after impacting the inner wall of the gas collection cavity 111, so that the gas can flow towards the inlet 301 of the first whole-pack explosion-proof valve 30, thereby facilitating the first whole-pack explosion-proof valve 30 to open at the right time and timely discharge the gas inside, ensuring the safety of the battery pack and reducing the safety risk caused by excessive internal pressure.

[0030] In one embodiment, as shown in Figure 1 and Figure 2 , the tray 100 is provided with a second accommodating cavity 11 located at one side of the first accommodating cavity 10, and the tray 100 further comprises a first partition plate 40 located in the second accommodating cavity 11, the first partition plate 40 divides the second accommodating cavity 11 into an electrical area 112 for accommodating a battery management module and a gas collection cavity 111. Since the gas collection cavity 111 and the electrical area 112 are independent of each other, high-temperature gas can be prevented from passing through the electrical area 112, thereby preventing the gas from causing adverse effects such as corrosion and short circuit on the electrical elements such as the battery management module in the electrical area 112, improving the stability and reliability of the operation of the battery control module, and thereby ensuring the normal operation of the entire battery pack control system.

[0031] In one embodiment, the electrical area 112 can not only accommodate the battery management module, but also various cables and connectors, the cables being used for transmitting electric energy and signals inside the battery pack, and the connectors being used for connecting different electrical components to ensure the connectivity of the circuit. The battery management module is used for monitoring the state such as the electric quantity and the temperature of the battery pack, and controlling the charging and discharging process of the battery pack.

[0032] In one embodiment, as shown in Figure 1 and Figure 2As shown, the tray 100 further comprises a second partition plate 41 between the first accommodating cavity 10 and the second accommodating cavity 11, and the first frame 20, the first partition plate 40 and the second partition plate 41 enclose a gas collection cavity 111. The gas collection cavity 111 and the first accommodating cavity 10 can be isolated by the second partition plate 41, so as to avoid the backflow of the gas in the gas collection cavity 111 into the battery area 101 of the first accommodating cavity 10, and reduce the risk of short circuit or other electrical faults caused by gas leakage.

[0033] In one embodiment, as shown in Figure 1 and Figure 2 The first frame 20 is inclinedly arranged, and encloses a triangular gas collection cavity 111 together with the first partition plate 40 and the second partition plate 41. In this way, the space occupied by the gas collection cavity 111 can be reduced, and the volume of the tray can be reduced.

[0034] In one embodiment, as shown in Figure 3 and Figure 4 The first frame 20 is internally provided with a flow guide channel 202 in communication with the gas collection cavity 111, and the flow guide channel 202 is in communication with the gas inlet 201 and the flow guide area 102, respectively. Through the design of the flow guide channel 202, the gas can quickly flow from the flow guide area 102 to the gas collection cavity 111, the residence time of the gas in the battery pack is reduced, and the potential safety risk is reduced. Moreover, the flow guide channel 202 is located in the interior of the first frame 20, so that the limited space of the tray can be fully utilized, and the structure of the battery pack is more reasonable and compact.

[0035] In one embodiment, as shown in Figures 2 to 4 The flow guide area 102 comprises a first end portion 1021 and a second end portion 1022 opposite in the length direction, and the second end portion 1022 is located on the side of the first end portion 1021 away from the first frame 20. The flow guide channel inlet 203 of the flow guide channel 202 is located on the side of the flow guide area 102 provided with the first end portion 1021. When the battery pack 200 uncontrollably sprays high-temperature gas, the gas diffuses from the area with higher gas pressure in the middle of the flow guide area 102 to the areas with lower gas pressure at the first end portion 1021 and the second end portion 1022. When the flow guide channel inlet 203 is located on the side of the first end portion 1021, it is more conducive to guiding the gas into the gas collection cavity 111, and it is conducive to reducing the residence time of the gas in the flow guide area 102, and improving the gas discharge efficiency.

[0036] In one embodiment, as shown in Figure 1 and Figure 2As shown, the tray 100 further comprises a second frame 21 located on the side of the second end 1022 away from the first end 1021, and the second frame 21 is provided with a second whole-pack explosion-proof valve 31, which is in communication with the flow guide area and the inlet of the second whole-pack explosion-proof valve 31 is arranged opposite to the flow guide area 102. When a large amount of high-temperature gas is generated in the battery area 101, part of the gas enters the gas collection cavity 111 through the flow guide area 102 and is discharged through the first whole-pack explosion-proof valve 30, and the other part flows to the second whole-pack explosion-proof valve 31 through the flow guide area 102 and is discharged through the second whole-pack explosion-proof valve 31, so that the exhaust efficiency can be improved. When the inlet of the second whole-pack explosion-proof valve 31 is arranged opposite to the flow guide area 102, the gas flow in the flow guide area 102 can directly rush to the inlet of the second whole-pack explosion-proof valve 31, which is more conducive to the timely opening and exhaust of the second whole-pack explosion-proof valve 31 and avoids excessive internal pressure of the battery pack.

[0037] In one embodiment, as shown in Figure 3 and Figure 4 The area of the gas inlet 201 is greater than the area of the inlet 301 of the first whole-pack explosion-proof valve 30. In this way, a large amount of gas generated from the battery area 101 can quickly enter the gas collection cavity 111 through the relatively large-area gas inlet 201, and after a certain buffering and gathering in the gas collection cavity 111, it can be smoothly discharged through the relatively small-area inlet 301 of the first whole-pack explosion-proof valve 30.

[0038] In one embodiment, as shown in Figure 1 and Figure 2 The tray 100 further comprises a third frame 22 located on the side of the flow guide area 102 away from the battery area 101, one end of the third frame 22 is connected with the first frame 20, and the other end is connected with the second frame 21. In this way, the flow guide area 102 is located on the side of the tray 100 close to the third frame 22, so that the gas discharged by the battery pack can be prevented from accumulating inside the battery pack.

[0039] In one embodiment, as shown in Figure 3 The bottom wall of the gas collection cavity 111 is lower than the bottom of the gas inlet 201, forming a liquid collection groove 1111. When the battery pack sprays high-temperature gas uncontrollably, it may also spray electrolyte and other substances. The liquid collection groove 1111 can accommodate electrolyte and other substances, so as to avoid the electrolyte and other substances from flowing randomly inside the battery pack.

[0040] In one embodiment, as shown in Figure 5 The top of the gas collection cavity 111 is provided with an end cover 1112. After the end cover 1112 is opened, the electrolyte and other substances in the liquid collection groove 1111 can be recovered.

[0041] The application also provides a battery pack, as shown in Figure 1 andFigure 2 As shown in FIG. 1, the battery pack includes the battery pack tray 100 and the battery pack 200, the battery pack 200 is arranged in the battery area 101, the battery pack 200 includes the battery cell 50 and the battery cell explosion-proof valve 51, and the battery cell explosion-proof valve 51 is arranged towards the flow guide area 102. When the battery cell 50 is in thermal runaway, the battery cell explosion-proof valve 51 opens and sprays high-temperature gas. When the battery cell explosion-proof valve 51 is arranged towards the flow guide area 102, the high-temperature gas can directly enter the flow guide area 102, thereby avoiding entering the battery area or the electrical area.

[0042] In one embodiment, as shown in FIG. 1, the battery pack tray 100 includes two battery areas 101, and the battery pack includes two battery packs 200, each of which is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 of each of the battery packs 200 is arranged towards the flow guide area 102 adjacent to the battery pack 200. The two battery packs 200 can increase the power of the battery pack, each of the battery packs 200 is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 thereof is arranged towards the flow guide area 102 adjacent thereto, which can avoid mutual spraying of the battery cell explosion-proof valves 51 of different battery packs 200, and ensure that the gas can quickly enter the flow guide area and be discharged by the whole-pack explosion-proof valve. Figure 1 Figure 2 In one embodiment, as shown in FIG. 1, the battery pack tray 100 includes two battery areas 101, and the battery pack includes two battery packs 200, each of which is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 of each of the battery packs 200 is arranged towards the flow guide area 102 adjacent to the battery pack 200. The two battery packs 200 can increase the power of the battery pack, each of the battery packs 200 is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 thereof is arranged towards the flow guide area 102 adjacent thereto, which can avoid mutual spraying of the battery cell explosion-proof valves 51 of different battery packs 200, and ensure that the gas can quickly enter the flow guide area and be discharged by the whole-pack explosion-proof valve.

[0043] In one embodiment, as shown in FIG. 1, the battery pack tray 100 includes two battery areas 101, and the battery pack includes two battery packs 200, each of which is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 of each of the battery packs 200 is arranged towards the flow guide area 102 adjacent to the battery pack 200. The two battery packs 200 can increase the power of the battery pack, each of the battery packs 200 is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 thereof is arranged towards the flow guide area 102 adjacent thereto, which can avoid mutual spraying of the battery cell explosion-proof valves 51 of different battery packs 200, and ensure that the gas can quickly enter the flow guide area and be discharged by the whole-pack explosion-proof valve. Figure 1 Figure 2 In one embodiment, as shown in FIG. 1, the battery pack tray 100 includes two battery areas 101, and the battery pack includes two battery packs 200, each of which is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 of each of the battery packs 200 is arranged towards the flow guide area 102 adjacent to the battery pack 200. The two battery packs 200 can increase the power of the battery pack, each of the battery packs 200 is arranged in one of the battery areas 101, and the battery cell explosion-proof valve 51 thereof is arranged towards the flow guide area 102 adjacent thereto, which can avoid mutual spraying of the battery cell explosion-proof valves 51 of different battery packs 200, and ensure that the gas can quickly enter the flow guide area and be discharged by the whole-pack explosion-proof valve.

[0044] The embodiments of the present application also provide a vehicle, which includes an electric motor, circuit system and the above-mentioned battery pack. The battery pack delivers electric energy to the electric motor through the circuit system, the electric motor converts the electric energy into mechanical energy to drive the rotation of the wheels of the vehicle, thereby realizing the running function of the vehicle.

[0045] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.​​

Claims

1. A tray of a battery pack, characterized by, The tray (100) is provided with a first accommodating cavity (10) and a gas collection cavity (111); the tray (100) comprises a first frame (20) provided with a gas inlet (201) in communication with the gas collection cavity (111); the first accommodating cavity (10) comprises a battery area (101) for accommodating a battery pack (200) and a flow guide area (102) located on at least one side of the battery area (101); the flow guide area (102) is in communication with the gas inlet (201); The tray (100) further comprises a first whole-pack explosion-proof valve (30) arranged on the first frame (20), the first whole-pack explosion-proof valve (30) is in communication with the gas collection cavity (111), and the inlet (301) of the first whole-pack explosion-proof valve (30) is arranged opposite to the gas inlet (201).

2. The tray of battery packs of claim 1, wherein, The area of the gas inlet (201) is greater than the area of the inlet (301) of the first whole-pack explosion-proof valve (30).

3. The tray of battery packs of claim 1, wherein, The tray is provided with a second accommodating cavity (11) located on one side of the first accommodating cavity (10), and the tray (100) further comprises a first partition plate (40) located in the second accommodating cavity (11), the first partition plate (40) divides the second accommodating cavity (11) into an electrical area (112) for accommodating a battery management module and the gas collection cavity (111).

4. The tray of battery packs of claim 3, wherein, The tray (100) further comprises a second partition plate (41) located between the first accommodating cavity (10) and the second accommodating cavity (11); the first frame (20), the first partition plate (40) and the second partition plate (41) enclose the gas collection cavity (111).

5. The tray of battery packs of claim 4, wherein, The first frame (20) is internally provided with a flow guide channel (202) in communication with the gas collection cavity (111), and the flow guide channel (202) is in communication with the gas inlet (201) and the flow guide area (102) respectively.

6. The tray of battery packs of claim 5, wherein, The flow guide area (102) comprises a first end (1021) and a second end (1022) opposite in the length direction, and the second end (1022) is located on the side away from the first end (1021) of the first frame (20); a flow guide channel inlet (203) of the flow guide channel (202) is located on the side of the flow guide area (102) provided with the first end (1021).

7. The tray of battery packs of claim 1, wherein, The flow guide area (102) comprises a first end (1021) and a second end (1022) opposite in the length direction; the tray (100) further comprises a second frame (21) located on the side of the second end (1022) away from the first end (1021), and the second frame (21) is provided with a second whole-pack explosion-proof valve (31), the second whole-pack explosion-proof valve (31) is in communication with the flow guide area (102), and the inlet of the second whole-pack explosion-proof valve (31) is arranged opposite to the flow guide area (102).

8. A battery pack, characterized by, The battery pack comprises a battery pack (200) and the tray (100) of the battery pack according to any one of claims 1 to 7, the battery pack (200) is arranged in the battery area (101); the battery pack (200) comprises battery cells (50) and battery cell explosion-proof valves (51), and the battery cell explosion-proof valves (51) are all directed towards the flow guide area (102).

9. The battery pack of claim 8, wherein, When the tray (100) comprises two battery areas (101), the battery pack comprises two battery packs (200), and each battery pack (200) is located in one battery area (101); the battery cell explosion-proof valves (51) of each battery pack (200) are all directed towards the flow guide area (102) adjacent to the battery pack (200).

10. A vehicle characterized by comprising: The vehicle comprises the battery pack according to claim 8 or 9.

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