Cooling device for multi-layer battery pack, multi-layer battery pack, and vehicle comprising same

Abstract

Disclosed is a vehicle. The vehicle comprises a multi-layer battery pack. Also disclosed is a cooling device for the multi-layer battery pack. The cooling device comprises a cooling assembly and exhaust channels. The cooling assembly comprises a cooling flow channel arranged in a first direction. A liquid inlet and a liquid outlet are formed on one side of the cooling assembly in a second direction, the liquid inlet and the liquid outlet are both communicated with the cooling flow channel, the cooling assembly is adapted to be arranged between two adjacent battery cell layers in a third direction, and the first direction, the second direction, and the third direction are orthogonal to each other. The exhaust channels comprise a first exhaust channel and a second exhaust channel. A gas inlet of the first exhaust channel is adapted to be opposite to explosion-proof valves of one of two adjacent battery cell layers, and a gas inlet of the second exhaust channel is adapted to be opposite to explosion-proof valves of the other of the two adjacent battery cell layers.

Description

Cooling device for multi-layer battery pack, multi-layer battery pack and its vehicle

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application filed on November 18, 2024, with application number 202411645211.0 and entitled "Cooling device for multi-layer battery pack, multi-layer battery pack and vehicle thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery pack technology, and in particular to a cooling device for a multilayer battery pack, a multilayer battery pack, and a vehicle thereof. Background Technology

[0004] In the prior art, dual-layer power battery packs often use tray side beams for venting to reduce the risk of thermal runaway. However, the aforementioned dual-layer power battery packs have the problem of complex venting circuits. Furthermore, since the upper and lower cell layers share the same explosion-proof valve, the high-temperature gas in the upper and / or lower cell layers is prone to cross-contamination, which reduces the safety of the dual-layer power battery.

[0005] Public content

[0006] This disclosure aims to at least address one of the technical problems existing in the prior art. To this end, one object of this disclosure is to provide a cooling device for a multi-layer battery pack that prevents high-temperature gas from entering the cavity in the event of thermal runaway in at least one adjacent cell layer, thereby reducing the risk of thermal runaway between two adjacent cell layers and improving the safety of the battery pack.

[0007] Another objective of this disclosure is to provide a multi-layer battery pack.

[0008] Another objective of this disclosure is to propose a vehicle.

[0009] A cooling device for a multilayer battery pack according to a first aspect embodiment of the present disclosure includes: a cooling assembly having cooling channels arranged along a first direction, and the cooling assembly having an inlet and an outlet on one side in a second direction, the inlet and the outlet respectively communicating with the cooling channels; the cooling assembly being adapted to be disposed between two adjacent cell layers in a third direction, the first direction, the second direction and the third direction being orthogonal to each other; and an exhaust channel including a first exhaust channel and a second exhaust channel, a first inlet of the first exhaust channel being adapted to face an explosion-proof valve of one of the two adjacent cell layers, and a second inlet of the second exhaust channel being adapted to face an explosion-proof valve of the other of the two adjacent cell layers.

[0010] According to a first aspect embodiment of the cooling device for a multi-layer battery pack, a first air inlet of a first exhaust channel is adapted to face an explosion-proof valve of one of two adjacent battery cell layers, and a second air inlet of a second exhaust channel is adapted to face an explosion-proof valve of the other of two adjacent battery cell layers. This simplifies the design of the exhaust channels of the cooling device, prevents high-temperature gas from entering the cavity of at least one adjacent battery cell layer in the event of thermal runaway, reduces the risk of thermal runaway between two adjacent battery cell layers, and improves the safety of the battery pack. Furthermore, the cooling channel located between two adjacent battery cell layers can cool the two adjacent battery cell layers and their cavities, further enhancing the safety of the battery pack.

[0011] According to some embodiments of this disclosure, the first exhaust passage and the second exhaust passage are respectively disposed on both sides of the cooling assembly in the third direction.

[0012] According to some embodiments of this disclosure, the cooling assembly includes a first cooling plate and a second cooling plate stacked along the third direction, the first cooling plate and the second cooling plate together defining the cooling channel, the cooling channel being wavy in shape.

[0013] According to some embodiments of this disclosure, a portion of the first cooling plate protrudes in a direction away from the second cooling plate to form a first protrusion, and a portion of the second cooling plate protrudes in a direction away from the first cooling plate to form a second protrusion, wherein the second protrusion and the first protrusion are opposite each other in the third direction to define the cooling channel.

[0014] According to some embodiments of this disclosure, the first exhaust channel and / or the second exhaust channel are located on the side of the cell layer adjacent to the cooling assembly in the third direction.

[0015] According to some embodiments of this disclosure, the cooling assembly further includes: a third exhaust plate disposed on the side of the first cooling plate away from the second cooling plate, the third exhaust plate having at least one first air inlet extending along the second direction; wherein a portion of the second cooling plate protrudes in a direction away from the first cooling plate to form a third protrusion, the third protrusion and the third exhaust plate together defining the first exhaust passage.

[0016] According to some embodiments of this disclosure, the first exhaust port, the liquid inlet, and the liquid outlet of the first exhaust channel are located on the same side of the cooling device in the second direction; the third protrusion includes a first protrusion section and a second protrusion section connected to each other, the first protrusion section extending along the second direction, and the second protrusion section extending along the first direction and communicating with the first exhaust port.

[0017] According to some embodiments of this disclosure, the cooling device for the multilayer battery pack further includes: at least one first venting assembly, the first venting assembly including a first venting plate and a second venting plate stacked along the third direction, the first venting plate and the second venting plate jointly defining a second venting channel, the second venting channel being located on the side of the cell layer away from the cooling assembly in the third direction.

[0018] According to some embodiments of this disclosure, a plurality of through holes are formed on the first exhaust plate, the plurality of through holes are connected to the second exhaust channel, the plurality of through holes are spaced apart along the first direction, and each of the through holes extends along the second direction.

[0019] According to some embodiments of this disclosure, the cooling assembly further includes: a fourth exhaust plate, the fourth exhaust plate being disposed on the side of the second cooling plate away from the first cooling plate, the fourth exhaust plate having at least one second air inlet extending along the second direction; wherein a portion of the second cooling plate is recessed toward the first cooling plate to form a recessed portion, the recessed portion and the fourth exhaust plate together defining the second exhaust passage.

[0020] According to some embodiments of this disclosure, the second exhaust port, the liquid inlet, and the liquid outlet of the second exhaust channel are located on one side of the cooling device in the second direction; the recess includes a first recessed section and a second recessed section connected to each other, the first recessed section extending along the second direction, and the second recessed section extending along the first direction and communicating with the second exhaust port.

[0021] According to some embodiments of this disclosure, the cooling device for the multilayer battery pack further includes: a plurality of second venting assemblies, each second venting assembly disposed on the side of the cell layer away from the cooling assembly in the third direction, the second venting assembly including a fifth venting plate and a sixth venting plate stacked along the third direction, the plurality of second venting assemblies respectively defining the first venting channel and the second venting channel.

[0022] According to some embodiments of this disclosure, the first exhaust channel and the second exhaust channel each have a plurality of sub-air inlets on one side of the third direction, the plurality of sub-air inlets are spaced apart along the first direction, and the plurality of sub-air inlets are opposite to the explosion-proof valve of the battery cell layer.

[0023] A multilayer battery pack according to a second aspect embodiment of the present disclosure includes: a plurality of cell layers arranged along the third direction; and at least one cooling device, at least a portion of which is disposed between two adjacent cell layers, the cooling device being a cooling device for a multilayer battery pack according to the first aspect embodiment of the present disclosure.

[0024] According to some embodiments of this disclosure, each of the battery cell layers includes a plurality of battery cells, the plurality of battery cells are arranged along the second direction, and each battery cell extends along the first direction; wherein, each battery cell includes a battery cell body, a terminal post and an explosion-proof valve, the terminal post is disposed on one side of the battery cell body in the first direction, and the explosion-proof valve is disposed on the side of the battery cell body adjacent to the exhaust channel in the third direction.

[0025] According to some embodiments of this disclosure, a plurality of explosion-proof valves of a plurality of said battery cells are opposite to a first air inlet of the first exhaust channel or a second air inlet of the second exhaust channel.

[0026] According to some embodiments of this disclosure, each of the battery cell layers includes multiple battery cell groups, the multiple battery cell groups are spaced apart along the first direction, and multiple battery cells of each battery cell group are arranged along the second direction; wherein, each battery cell includes a battery cell body, a terminal post and an explosion-proof valve, the terminal post is disposed on one side of the battery cell body in the third direction, and the explosion-proof valve is disposed on the side of the battery cell body adjacent to the exhaust channel in the third direction.

[0027] According to some embodiments of this disclosure, the explosion-proof valves of two adjacent battery cells along the third direction are opposite to each other, and a cooling assembly, a first exhaust channel and a second exhaust channel are provided between the two adjacent battery cell layers. The first exhaust channel and the second exhaust channel are respectively provided on both sides of the cooling assembly in the third direction.

[0028] According to some embodiments of this disclosure, the explosion-proof valves of two adjacent battery cells along the third direction face the same side, a cooling assembly and a first exhaust channel are provided between two adjacent battery cell layers, the two adjacent battery cell layers are respectively a first battery cell layer and a second battery cell layer, the first exhaust channel is located between the cooling assembly and the explosion-proof valve of the first battery cell layer, and the second exhaust channel is disposed adjacent to the explosion-proof valve of the second battery cell layer.

[0029] According to some embodiments of this disclosure, the explosion-proof valves of two adjacent cells along the third direction are opposite to each other, a cooling assembly is provided between two adjacent cell layers, the two adjacent cell layers are respectively a first cell layer and a second cell layer, the first exhaust channel is disposed adjacent to the explosion-proof valve of the first cell layer, and the second exhaust channel is disposed at the explosion-proof valve of the second cell layer.

[0030] A vehicle according to a third aspect of the present disclosure includes a multilayer battery pack according to the second aspect of the present disclosure described above.

[0031] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0032] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 is a schematic diagram of the cooling assembly of a cooling device according to an embodiment of the present disclosure;

[0034] Figure 2 is a partial exploded view of the cooling assembly of a cooling device according to an embodiment of the present disclosure;

[0035] Figure 3 is an exploded view of the cooling assembly of a cooling device according to an embodiment of the present disclosure;

[0036] Figure 4 is a schematic diagram of a multilayer battery pack according to a first embodiment of the present disclosure;

[0037] Figure 5 is a partial cross-sectional view of a multilayer battery pack according to a first embodiment of the present disclosure;

[0038] Figure 6 is an enlarged view of part A circled in Figure 5;

[0039] Figure 7 is an exploded view of the multi-layer battery pack shown in Figure 5;

[0040] Figure 8 is a schematic diagram of a multilayer battery pack according to a second embodiment of the present disclosure;

[0041] Figure 9 is a partial cross-sectional view of a multilayer battery pack according to a second embodiment of the present disclosure;

[0042] Figure 10 is an enlarged view of part B circled in Figure 9;

[0043] Figure 11 is a schematic diagram of the second cooling plate of the cooling assembly of the cooling device according to an embodiment of the present disclosure;

[0044] Figure 12 is a schematic diagram of the cooperation between the first exhaust and the battery cell layer of the cooling device according to an embodiment of the present disclosure;

[0045] Figure 13 is a partial cross-sectional view of a multilayer battery pack according to a third embodiment of the present disclosure;

[0046] Figure 14 is an enlarged view of part C circled in Figure 13;

[0047] Figure 15 is a schematic diagram of the second cooling plate of the cooling device according to the third embodiment of the present disclosure;

[0048] Figure 16 is a schematic diagram of a multilayer battery pack according to a fourth embodiment of the present disclosure;

[0049] Figure 17 is a partial cross-sectional view of a multilayer battery pack according to a fourth embodiment of the present disclosure;

[0050] Figure 18 is an enlarged view of part D circled in Figure 17;

[0051] Figure 19 is a schematic block diagram of a vehicle according to an embodiment of the present disclosure.

[0052] Reference numerals: 1000, vehicle; 100, cooling device; 1. Cooling assembly; 11. Cooling channel; 12. Liquid inlet; 13. Liquid outlet; 14. First cooling plate; 141. First protrusion; 15. Second cooling plate; 151. Second protrusion; 152. Third protrusion; 1521. First protruding section; 1522. Second protruding section; 153. Recess; 1531. First recessed section; 1532. Second recessed section; 16. Third exhaust plate; 161. First air inlet; 17. Fourth exhaust plate; 171. Second air inlet; 2. Exhaust channel; 21. First exhaust channel; 211. First exhaust port; 22. Second exhaust channel; 221. Second exhaust port; 222. Sub-air inlet; 3. First exhaust assembly; 31. First exhaust plate; 311. Through hole; 32. Second exhaust plate; 4. Second exhaust assembly; 41. Fifth exhaust plate; 42. Sixth exhaust plate; 200. Multi-layer battery pack; 201, Cell layer; 202, Cell; 2021, Cell body; 2022, Terminal; 2023, Explosion-proof valve; 203, Cell assembly. Detailed Implementation

[0053] The cooling device 100 of a multilayer battery pack 200 according to an embodiment of the first aspect of the present disclosure is described below with reference to Figures 1-18.

[0054] As shown in Figures 1-18, the cooling device 100 of the multilayer battery pack 200 according to the first aspect of the present disclosure includes a cooling assembly 1 and an exhaust channel 2.

[0055] Specifically, the cooling assembly 1 has a cooling channel 11 arranged along a first direction AA (e.g., the left-right direction in FIG1), and the cooling assembly 1 has an inlet 12 and an outlet 13 formed on one side of a second direction BB (e.g., the front-back direction in FIG1). The inlet 12 and the outlet 13 are respectively connected to the cooling channel 11. In a third direction CC (e.g., the up-down direction in FIG1), the cooling assembly 1 is adapted to be disposed between two adjacent cell layers 201. The first direction AA, the second direction BB, and the third direction CC are orthogonal to each other. The exhaust channel 2 includes a first exhaust channel 21 and a second exhaust channel 22. The first air inlet 161 of the first exhaust channel 21 is adapted to be opposite to the explosion-proof valve 2023 of one of the two adjacent cell layers 201, and the second air inlet 171 of the second exhaust channel 22 is adapted to be opposite to the explosion-proof valve 2023 of the other of the two adjacent cell layers 201.

[0056] For example, in the examples of Figures 1-3, along the first direction AA, the cooling channel 11 on the cooling assembly 1 is connected to the inlet 12 and the outlet 13, thereby forming a flow loop for the coolant. After entering from the inlet 12, the coolant flows along the cooling channel 11 and exits through the outlet 13. During the flow of the coolant in the cooling channel 11, heat exchange occurs, which cools the battery cell layer 201 adjacent to the cooling channel 11 and the air in the cavity corresponding to the battery cell layer 201.

[0057] The cooling channels 11 are arranged along the first direction AA, which helps to increase the area of ​​the cooling channels 11 in the cooling assembly 1, thereby improving the cooling effect of the cooling assembly 1. At the same time, the liquid inlet 12 and the liquid outlet 13 are located in the second direction BB of the cooling assembly 1, which helps to increase the temperature uniformity of the cooling assembly 1 and avoid uneven heat exchange caused by local overcooling or overheating of the cooling assembly 1. The cooling assembly 1 cools down the air in the two adjacent cell layers 201 and the corresponding cavity of the cell layer 201, reducing the risk of thermal runaway of the multilayer battery pack 200 and improving the safety of the multilayer battery pack 200.

[0058] The first exhaust channel 21 and the second exhaust channel 22 are respectively connected to the explosion-proof valves 2023 of the two adjacent cell layers 201. This facilitates the entry of high-temperature gas from the first air inlet 161 into the first exhaust channel 21 and / or from the second air inlet 171 into the second exhaust channel 22 when thermal runaway occurs in the corresponding cell layer 201. This simplifies the design of the exhaust channels 2 of the cooling device 100, prevents high-temperature gas from leaking into the other cell layer 201 during thermal runaway, reduces the risk of thermal runaway in both adjacent cell layers 201, and further improves the safety of the battery pack 200.

[0059] According to an embodiment of the present disclosure, the cooling device 100 of the multilayer battery pack 200 has a first air inlet 161 of the first exhaust channel 21 adapted to face the explosion-proof valve 2023 of one of the two adjacent cell layers 201, and a second air inlet 171 of the second exhaust channel 22 adapted to face the explosion-proof valve 2023 of the other of the two adjacent cell layers 201. This simplifies the design of the exhaust channel 2 of the cooling device 100, prevents high-temperature gas from entering the cavity of at least one of the adjacent cell layers 201 in the event of thermal runaway, reduces the risk of thermal runaway between the two adjacent cell layers 201, and improves the safety of the battery pack 200. Furthermore, the cooling channel 11 located between the two adjacent cell layers 201 can cool the two adjacent cell layers 201 and their cavities, further improving the safety of the battery pack 200.

[0060] According to some embodiments of this disclosure, referring to Figures 5-18, the first exhaust channel 21 and the second exhaust channel 22 are respectively disposed on both sides of the cooling assembly 1 in the third direction CC. With this arrangement, battery cell layers 201 are respectively disposed on both sides of the cooling device 100 in the third direction CC. The battery cell layers 201 on both sides can be guided and vented through the first exhaust channel 21 and the second exhaust channel 22, respectively, avoiding the risk of explosion caused by the accumulation of high-temperature gas after thermal runaway. Simultaneously, it prevents high-temperature gas from flowing within the battery cell layers 201 on both sides of the cooling device 100, thereby improving the cooling effect of the cooling device 100 on the multilayer battery pack 200 and enhancing the safety of the multilayer battery pack 200.

[0061] Further, referring to Figures 2-7, the cooling assembly 1 includes a first cooling plate 14 and a second cooling plate 15 stacked along the third direction CC. The first cooling plate 14 and the second cooling plate 15 together define a cooling channel 11, which has a wavy shape. The cooperation of the first cooling plate 14 and the second cooling plate 15 forms a sealed cooling channel 11, which helps improve the defined stability and reliability of the cooling channel 11. This extends the flow path of the coolant in the cooling channel 11, improves the cooling efficiency of the cooling assembly 1 in reducing high-temperature gas in the exhaust channel 2 and the cooling efficiency of the adjacent battery cell layers 201, and enhances the safety of the multilayer battery pack 200. Both the side of the first cooling plate 14 away from the second cooling plate 15 and the side of the second cooling plate 15 away from the first cooling plate 14 can be used for heat exchange, increasing the heat exchange area of ​​the cooling assembly 1 and improving the heat exchange efficiency.

[0062] Furthermore, referring to Figures 2-7, a portion of the first cooling plate 14 protrudes away from the second cooling plate 15 to form a first protrusion 141, and a portion of the second cooling plate 15 protrudes away from the first cooling plate 14 to form a second protrusion 151. The second protrusion 151 and the first protrusion 141 are opposite each other in the third direction CC to define the cooling channel 11. Thus, the relative positions of the first protrusion 141 of the first cooling plate 14 and the second protrusion 151 of the second cooling plate 15 are the flow positions of the coolant, i.e., the coolant flows within the cooling channel 11. This arrangement helps to increase the coolant flow rate, further improving the cooling assembly 1's efficiency in reducing the high-temperature gas in the exhaust channel 2 and its cooling efficiency for the adjacent battery cell layers 201.

[0063] According to some embodiments of this disclosure, referring to FIG6, the first exhaust channel 21 or the second exhaust channel 22 on the third-party CC direction is located on the side of the cell layer 201 adjacent to the cooling assembly 1. This shortens the path for gas to enter the first exhaust channel 21 or the second exhaust channel 22, allowing high-temperature gas to be quickly discharged along the first exhaust channel 21 or the second exhaust channel 22. This prevents high-temperature gas from leaking into another cell layer 201 during thermal runaway, reducing the risk of thermal runaway caused by high-temperature gas leakage and further improving the safety of the battery pack 200.

[0064] According to some embodiments of this disclosure, referring to Figures 1-10, the cooling assembly 1 further includes a third exhaust plate 16, which is disposed on the side of the first cooling plate 14 away from the second cooling plate 15. At least one first air inlet 161 is formed on the third exhaust plate 16, extending along a second direction BB. A portion of the second cooling plate 15 protrudes in a direction away from the first cooling plate 14 to form a third protrusion 152, which, together with the third exhaust plate 16, defines a first exhaust passage 21.

[0065] Referring to Figures 10 and 11, the third exhaust plate 16 and the first cooling plate 14 are stacked along the third direction CC. The third protrusion 152 on the third direction CC and the third exhaust plate 16 help to define the first exhaust channel 21. In the event of thermal runaway, high-temperature gas enters the first exhaust channel 21 through the explosion-proof valve and the first air inlet 161 on the third exhaust plate 16, diffuses and is cooled. As the pressure in the first exhaust channel 21 increases, the cooled gas is discharged.

[0066] Furthermore, referring to Figures 8-11, the first exhaust port 211, liquid inlet 12, and liquid outlet 13 of the first exhaust channel 21 are located on the same side of the cooling device 100 in the second direction BB. This increases the regularity of the cooling device 100's layout, facilitating user operation of the first exhaust port 211, liquid inlet 12, and liquid outlet 13. Simultaneously, it reduces the length of the first exhaust channel 21, thereby improving exhaust efficiency and avoiding the impact of high-temperature gas on high-voltage electrical connections, thus reducing the risk of thermal runaway of the multilayer battery pack 200.

[0067] As shown in Figures 10 and 11, the third protrusion 152 includes a first protrusion segment 1521 and a second protrusion segment 1522 connected to each other. The first protrusion segment 1521 extends along the second direction BB, and the second protrusion segment 1522 extends along the first direction AA and communicates with the first exhaust port 211. The arrangement of the first protrusion segment 1521 and the second protrusion segment 1522 helps to limit the direction of the first exhaust channel 21. The arrangement of the first protrusion segment 1521 helps to increase the speed at which high-temperature gas enters the first exhaust channel 21, and the second protrusion segment 1522, extending along the first direction AA, shortens the path of high-temperature gas exhaust, thereby reducing the risk of thermal runaway and the danger of corresponding cell layer 201 bulging and explosion.

[0068] Furthermore, referring to Figures 9-10 and in conjunction with Figure 12, the cooling device 100 of the multilayer battery pack 200 also includes at least one first exhaust assembly 3. The first exhaust assembly 3 includes a first exhaust plate 31 and a second exhaust plate 32 stacked along the third direction CC. The first exhaust plate 31 and the second exhaust plate 32 together define a second exhaust channel 22. The second exhaust channel 22 is located on the side of the cell layer 201 away from the cooling assembly 1 in the third direction CC.

[0069] The first exhaust plate 31 can be disposed adjacent to the battery cell layer 201, and the second exhaust plate 32 can be disposed away from the battery cell layer 201; alternatively, the second exhaust plate 32 can be disposed adjacent to the battery cell layer 201, and the first exhaust plate 31 can be disposed away from the battery cell layer 201. The second exhaust channel 22, jointly defined by the first exhaust plate 31 and the second exhaust plate 32, is disposed away from the cooling component 1 in the third direction CC. This allows the cooling component 1 to fully exert its cooling effect on the high-temperature gas on one side of the battery cell layer 201 in the third direction CC, and allows the second exhaust channel 22 to fully exert its function on the other side of the battery cell layer 201 in the third direction CC. This facilitates the improvement of the processing speed of the high-temperature gas and avoids the risk of thermal runaway caused by the accumulation of high-temperature gas.

[0070] Further, referring to Figures 9-10 and in conjunction with Figure 12, a plurality of through holes 311 are formed on the first exhaust plate 31. In the description of this disclosure, "a plurality of" means two or more. The plurality of through holes 311 communicate with the second exhaust channel 22, the plurality of through holes 311 are spaced apart along the first direction AA, and each through hole 311 extends along the second direction BB. That is, the second exhaust plate 32 is located on the side of the first exhaust plate 31 away from the corresponding cell layer 201, and the first exhaust plate 31 is adjacent to the corresponding cell layer 201. This design facilitates the high-temperature gas in the cell layer 201 to enter the second exhaust channel 22 through the plurality of through holes 311 and then be discharged. The battery cell layer 201 corresponding to the aforementioned cooling device 100 may be equipped with multiple explosion-proof valves 2023 spaced apart along the first direction AA. Each explosion-proof valve 2023 corresponds to a single through-hole 311, allowing the through-hole 311 to provide clearance for the explosion-proof valve 2023, preventing damage to the valve. Simultaneously, it reduces the distance between the explosion-proof valve 2023 and the through-hole 311, improving exhaust efficiency. Each through-hole 311 extends along the second direction BB, which helps increase the gas flow rate entering the exhaust channel 2 from each through-hole 311. Furthermore, multiple explosion-proof valves 2023 can be arranged along the second direction BB corresponding to each through-hole 311 on the battery cell layer 201, meeting exhaust requirements while reducing the processing difficulty of the first exhaust plate 31.

[0071] According to some embodiments of this disclosure, referring to Figures 13-15, the cooling assembly 1 further includes a fourth exhaust plate 17, which is disposed on the side of the second cooling plate 15 away from the first cooling plate 14. At least one second air inlet 171 is formed on the fourth exhaust plate 17, extending along a second direction BB. A portion of the second cooling plate 15 is recessed towards the first cooling plate 14 to form a recess 153, which, together with the fourth exhaust plate 17, defines a second exhaust passage 22.

[0072] The second cooling plate 15 is stacked with the fourth exhaust plate 17 on the side away from the first cooling plate 14. The recess 153 on the second cooling plate 15 corresponds at least partially to the second air inlet 171 of the fourth exhaust plate 17. High-temperature gas can enter the second exhaust channel 22 along the second air inlet 171, thereby venting the high-temperature gas from the cell layer 201 corresponding to the fourth exhaust plate 17, thus reducing the risk of thermal runaway of the multilayer battery pack 200 and improving the safety of the multilayer battery pack 200.

[0073] Furthermore, the second exhaust port 221, liquid inlet 12, and liquid outlet 13 of the second exhaust channel 22 are located on one side of the cooling device 100 in the second direction BB. Referring to Figures 13-15, the recess 153 includes a first recessed section 1531 and a second recessed section 1532 connected to each other. The first recessed section 1531 extends along the second direction BB, and the second recessed section 1532 extends along the first direction AA and communicates with the second exhaust port 221. The second exhaust port 221, liquid inlet 12, and liquid outlet 13 of the second exhaust channel 22 are integrated and arranged, which facilitates the user's operation of the second exhaust port 221, liquid inlet 12, and liquid outlet 13. At the same time, the length of the second exhaust channel 22 is reduced, thereby improving the exhaust efficiency and avoiding the influence of high-temperature gas on the high-voltage electrical connection, reducing the risk of thermal runaway of the multilayer battery pack 200.

[0074] As shown in Figures 13-15, the first recessed section 1531 is adapted to be opposite to the second air inlet 171, thereby increasing the speed at which high-temperature gas enters the second exhaust channel 22. The second recessed section 1532 extends along the first direction AA, shortening the path of high-temperature gas exhaust, thereby reducing the risk of thermal runaway and reducing the dangers such as bulging and explosion of the corresponding cell layer 201.

[0075] According to some embodiments of this disclosure, referring to Figures 16-18, the cooling device 100 of the multilayer battery pack 200 further includes a plurality of second venting assemblies 4. Each second venting assembly 4 is disposed on the side of the cell layer 201 away from the cooling assembly 1 in the third direction CC. The second venting assembly 4 includes a fifth venting plate 41 and a sixth venting plate 42 stacked along the third direction CC. The plurality of second venting assemblies 4 respectively define a first venting channel 21 and a second venting channel 22. As shown in Figures 17 and 18, two second venting assemblies 4 are respectively disposed on both sides of the cell layer 201 away from the cooling assembly 1, and the two venting assemblies 3 respectively define a first venting channel 21 and a second venting channel 22. Thus, the high-temperature gas of the cell layer 201 away from the cooling assembly 1 can be discharged by the first venting channel 21 and the second venting channel 22, thereby reducing the risk of thermal runaway of the cell layer 201 and improving the safety of the cell layer 201 in use.

[0076] According to other embodiments of this disclosure, for example, referring to FIG10, both the first exhaust channel 21 and the second exhaust channel 22 have a plurality of sub-intake ports 222 formed on one side of the second direction BB. The plurality of sub-intake ports 222 are spaced apart along the first direction AA, and the plurality of sub-intake ports 222 are opposite to the explosion-proof valve 2023 of the cell layer 201. High-temperature gas enters the corresponding first exhaust channel 21 or second exhaust channel 22 through the plurality of sub-intake ports 222 and is then discharged, thereby increasing the exhaust efficiency of high-temperature gas and reducing the risk of thermal runaway of the multilayer battery pack 200.

[0077] The multilayer battery pack 200 according to the second aspect embodiment of the present disclosure, as shown in Figures 4-18, includes a plurality of cell layers 201 arranged along a third direction CC; at least one cooling device 100, at least some of which are disposed between two adjacent cell layers 201, and the cooling device 100 is the cooling device 100 of the multilayer battery pack 200 according to the first aspect embodiment of the present disclosure.

[0078] According to the embodiments of the present disclosure, the multilayer battery pack 200, by providing the cooling device 100 between two adjacent cell layers 201, facilitates the export of high-temperature gas from each cell layer 201 to the outside of the multilayer battery pack 200, and avoids interference of high-temperature gas with adjacent cell layers 201, thereby improving the safety of the multilayer battery pack 200 in use.

[0079] Further, referring to Figures 4-7, each cell layer 201 includes multiple cells 202, which are arranged along the second direction BB, and each cell 202 extends along the first direction AA. Each cell 202 includes a cell body 2021, a terminal post 2022, and an explosion-proof valve 2023. The terminal post 2022 is located on one side of the cell body 2021 in the first direction AA, and the explosion-proof valve 2023 is located on the side of the cell body 2021 adjacent to the exhaust channel 2 in the third direction CC.

[0080] According to some embodiments of this disclosure, multiple explosion-proof valves 2023 of the multiple battery cells 202 are opposite to the first air inlet 161 of the first exhaust channel 21 or the second air inlet 171 of the second exhaust channel 22. This arrangement helps to improve the efficiency of the explosion-proof valves 2023 entering the first exhaust channel 21 or the second exhaust channel 22, thereby enhancing the effect of the cooling device 100 in reducing the temperature of the multilayer battery pack 200 and improving the safety of the multilayer battery pack 200 in use.

[0081] For example, in the examples of Figures 4-7, each cell layer 201 includes twenty cells 202, which are arranged along the second direction BB. The terminals 2022 and explosion-proof valves 2023 of each cell 202 are spaced apart along the first direction AA to prevent the explosion-proof valves 2023 from affecting high-voltage components such as the terminals 2022. The explosion-proof valves 2023 are positioned in the third direction CC towards the first air inlet 161 of the first exhaust channel 21 or the second air inlet 171 of the second exhaust channel 22, which helps to shorten the distance between the high-temperature gas and the cooling device 100. When a cell 202 experiences thermal runaway, the high-temperature gas inside the cell 202 is discharged through the explosion-proof valve 2023 and then through the cooling device 100, preventing it from affecting adjacent cell layers 201 and thus improving the safety of the multilayer battery pack 200.

[0082] As shown in Figures 4-7, the cooling device 100 between two battery cell layers 201 arranged along the third direction CC includes: a third exhaust plate 16, a first cooling plate 14, a second cooling plate 15, and a fourth exhaust plate 17 stacked sequentially along the third direction CC. Thus, the high-temperature gas generated by the upper battery cell layer 201 enters the first exhaust channel 21 through the first air inlet 161 on the third exhaust plate 16 and is then discharged; the high-temperature gas generated by the lower battery cell layer 201 can enter the second exhaust channel 22 through the second air inlet 171, thereby achieving the discharge of high-temperature gas from the battery cell layer 201 corresponding to the fourth exhaust plate 17.

[0083] According to some embodiments of this disclosure, referring to Figures 8-18, each cell layer 201 includes multiple cell groups 203, which are spaced apart along a first direction AA, and multiple cells 202 of each cell group 203 are arranged along a second direction BB. Each cell 202 includes a cell body 2021, a terminal post 2022, and an explosion-proof valve 2023. The terminal post 2022 is located on the side of the cell body 2021 in the third direction CC, and the explosion-proof valve 2023 is located on the side of the cell body 2021 adjacent to the exhaust channel 2 in the third direction CC.

[0084] Each cell layer 201 includes eight cell groups 203, which are arranged along a first direction AA. Within each cell group 203, the cells 202 are arranged along a second direction BB. Correspondingly, the cooling device 100 includes eight first exhaust channels 21 and eight second exhaust channels 22. The eight first exhaust channels 21 are respectively opposite to all the explosion-proof valves 2023 of the eight cell groups 203 in one cell layer 201, and the eight second exhaust channels 22 are respectively opposite to all the explosion-proof valves 2023 of the eight cell groups 203 in another cell layer 201. This facilitates separate exhaust for each cell group 203, reducing the flow of high-temperature gases between multiple cell groups 203 in the same cell layer 201, thereby further reducing the risk of thermal runaway in the multilayer battery pack 200 and improving the safety of the multilayer battery pack 200 in use.

[0085] Furthermore, the explosion-proof valves 2023 of two adjacent cells 202 along the third direction CC are opposite to each other. A cooling assembly 1, a first exhaust channel 21, and a second exhaust channel 22 are provided between two adjacent cell layers 201. The first exhaust channel 21 and the second exhaust channel 22 are respectively located on both sides of the cooling assembly 1 along the third direction CC. As shown in Figures 13-15, the cells 202 of the upper cell group 203 are inverted, and the cells 202 of the lower cell group 203 are upright, so that the explosion-proof valves 2023 of all cells 202 are aligned with the central cooling device 100, and the high-temperature gas is discharged through the exhaust channel 2 in the cooling device 100.

[0086] According to other embodiments of this disclosure, the explosion-proof valves 2023 of two adjacent cells 202 along the third direction CC face the same side. A cooling assembly 1 and a first exhaust channel 21 are provided between two adjacent cell layers 201. The two adjacent cell layers 201 are respectively the first cell layer and the second cell layer. The first exhaust channel 21 is located between the cooling assembly 1 and the explosion-proof valve 2023 of the first cell layer. The second exhaust channel 22 is located adjacent to the explosion-proof valve 2023 of the second cell layer. As shown in Figures 9-10, the cells 202 of the upper cell group 203 and the cells 202 of the lower cell group 203 are both inverted. An exhaust assembly 3 composed of a first exhaust plate 31 and a second exhaust plate 32 is provided on the side of the upper cell group 203 away from the lower cell group 203. A first cooling plate 14, a second cooling plate 15, and a fourth exhaust plate 17 are provided between two adjacent cell layers 201. The exhaust assembly 3 can be integrated with the tray of the multi-layer battery pack 200, which is not specifically limited here. As a result, the high-temperature gas from the upper battery cell assembly 203 enters the exhaust assembly 3 through the explosion-proof valve 2023 on the side away from the lower battery cell assembly 203 and is then discharged, while the high-temperature gas from the lower battery cell assembly 203 enters the middle second exhaust channel 22 through the explosion-proof valve 2023 and is then discharged.

[0087] In this process, the gas corresponding to each of the eight cell groups 203 flows along the second direction BB and then along the first direction AA until it flows out of the multi-layer battery pack 200. Because the gas flows in the same direction as the airflow, it will not enter the other exhaust channels 2 and cause interference, thus reducing the risk of thermal runaway.

[0088] According to some embodiments of this disclosure, the explosion-proof valves 2023 of two adjacent cells 202 along the third direction CC are opposite to each other, and a cooling assembly 1 is provided between two adjacent cell layers 201. The two adjacent cell layers 201 are respectively the first cell layer and the second cell layer. The first exhaust channel 21 is provided adjacent to the explosion-proof valve 2023 of the first cell layer, and the second exhaust channel 22 is provided at the explosion-proof valve 2023 of the second cell layer. As shown in Figures 17-18, the upper cell layer 201 and the lower cell layer 201 are separated by the cooling assembly 1, the explosion-proof valves 2023 of the two cells 202 are opposite to each other, and an exhaust assembly 3 composed of a first exhaust plate 31 and a second exhaust plate 32 is provided on the side of each cell layer 201 away from the other. Alternatively, the upper battery cell layer 201 and the lower battery cell layer 201 are spaced apart, and a cooling device 100 consisting of a third exhaust plate 16, a first cooling plate 14 and a second cooling plate 15 or a cooling device 100 consisting of a first cooling plate 14, a second cooling plate 15 and a fourth exhaust plate 17 is provided on the side of the two battery cell layers 201 away from each other.

[0089] As shown in FIG19, a vehicle 1000 according to a third aspect embodiment of the present disclosure includes a multilayer battery pack 200 according to the second aspect embodiment of the present disclosure described above.

[0090] According to the embodiments of the present disclosure, the vehicle 1000 adopts the above-mentioned multi-layer battery pack 200, which is beneficial to improving the power supply reliability and stability of the vehicle 1000, thereby improving the driving range of the vehicle 1000, enhancing the operational stability of the vehicle 1000, and further enhancing the market competitiveness of the vehicle 1000.

[0091] Other configurations and operations of the multilayer battery pack 200 and the vehicle 1000 according to embodiments of this disclosure are known to those skilled in the art and will not be described in detail here.

[0092] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0093] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0095] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooling arrangement (100) for a multi-layer battery pack (200), characterized by, include: A cooling assembly (1) having a cooling channel (11) arranged along a first direction (AA), and the cooling assembly (1) having an inlet (12) and an outlet (13) on one side of a second direction (BB), the inlet (12) and the outlet (13) respectively communicating with the cooling channel (11), the cooling assembly (1) being adapted to be disposed between two adjacent cell layers (201) in a third direction (CC), the first direction (AA), the second direction (BB) and the third direction (CC) being orthogonal to each other; and The exhaust channel (2) includes a first exhaust channel (21) and a second exhaust channel (22). The first air inlet (161) of the first exhaust channel (21) is adapted to be opposite to the explosion-proof valve (2023) of one of the two adjacent battery cell layers (201), and the second air inlet (171) of the second exhaust channel (22) is adapted to be opposite to the explosion-proof valve (2023) of the other of the two adjacent battery cell layers (201).

2. The cooling arrangement (100) of a multi-layered battery pack (200) according to claim 1, characterized in that, The first exhaust passage (21) and the second exhaust passage (22) are respectively located on both sides of the cooling assembly (1) in the third direction (CC).

3. The cooling arrangement (100) of a multi-layer battery pack (200) according to claim 1 or 2, characterized in that The cooling assembly (1) includes a first cooling plate (14) and a second cooling plate (15) stacked along the third direction (CC), the first cooling plate (14) and the second cooling plate (15) together defining the cooling channel (11), the cooling channel (11) being wavy in shape.

4. The cooling arrangement (100) of a multi-layered battery pack (200) according to claim 3, characterized in that, A portion of the first cooling plate (14) protrudes in a direction away from the second cooling plate (15) to form a first protrusion (141), and a portion of the second cooling plate (15) protrudes in a direction away from the first cooling plate (14) to form a second protrusion (151). The second protrusion (151) and the first protrusion (141) are opposite each other in the third direction (CC) to define the cooling channel (11).

5. The cooling arrangement (100) of a multi-layer battery pack (200) according to claim 3 or 4, characterized in that On the third direction (CC), the first exhaust channel (21) and / or the second exhaust channel (22) are located on the side of the cell layer (201) adjacent to the cooling assembly (1).

6. The cooling arrangement (100) of a multi-layer battery pack (200) according to any one of claims 3-5, characterized in that, The cooling assembly (1) also includes: A third exhaust plate (16) is provided on the side of the first cooling plate (14) away from the second cooling plate (15). At least one first air inlet (161) is formed on the third exhaust plate (16), and the first air inlet (161) extends along the second direction (BB). In this part, a portion of the second cooling plate (15) protrudes in a direction away from the first cooling plate (14) to form a third protrusion (152), and the third protrusion (152) and the third exhaust plate (16) together define the first exhaust channel (21).

7. The cooling arrangement (100) of a multi-layered battery pack (200) according to claim 6, characterized in that, The first exhaust port (211), the liquid inlet (12), and the liquid outlet (13) of the first exhaust channel (21) are located on the same side of the cooling device (100) in the second direction (BB); The third protrusion (152) includes a first protrusion segment (1521) and a second protrusion segment (1522) connected to each other. The first protrusion segment (1521) extends along the second direction (BB), and the second protrusion segment (1522) extends along the first direction (AA) and communicates with the first exhaust port (211).

8. The cooling arrangement (100) of a multi-layer battery pack (200) according to claim 6 or 7, characterized in that Also includes: At least one first exhaust assembly (3) includes a first exhaust plate (31) and a second exhaust plate (32) stacked along the third direction (CC), the first exhaust plate (31) and the second exhaust plate (32) together defining a second exhaust passage (22), the second exhaust passage (22) being located on the side of the cell layer (201) away from the cooling assembly (1) in the third direction (CC).

9. The cooling arrangement (100) of a multi-layered battery pack (200) according to claim 8, characterized in that, The first exhaust plate (31) has a plurality of through holes (311) formed thereon, the plurality of through holes (311) are connected to the second exhaust channel (22), the plurality of through holes (311) are spaced apart along the first direction (AA), and each of the through holes (311) extends along the second direction (BB).

10. The cooling arrangement (100) of a multi-layer battery pack (200) according to any one of claims 6-9, characterized in that, The cooling assembly (1) also includes: A fourth exhaust plate (17) is provided on the side of the second cooling plate (15) away from the first cooling plate (14), and at least one second air inlet (171) is formed on the fourth exhaust plate (17), the second air inlet (171) extending along the second direction (BB). In this part, a portion of the second cooling plate (15) is recessed toward the first cooling plate (14) to form a recess (153), and the recess (153) together with the fourth exhaust plate (17) defines the second exhaust channel (22).

11. The cooling arrangement (100) of a multi-layered battery pack (200) according to claim 10, characterized in that, The second exhaust port (221), the liquid inlet (12) and the liquid outlet (13) of the second exhaust channel (22) are located on the side of the cooling device (100) in the second direction (BB); The recess (153) includes a first recessed section (1531) and a second recessed section (1532) connected to each other. The first recessed section (1531) extends along the second direction (BB), and the second recessed section (1532) extends along the first direction (AA) and communicates with the second exhaust port (221).

12. The cooling arrangement (100) of a multi-layer battery pack (200) according to any one of claims 1-11, characterized in that, Also includes: A plurality of second exhaust assemblies (4) are provided on the third third direction (CC) on the side of the cell layer (201) away from the cooling assembly (1). Each second exhaust assembly (4) includes a fifth exhaust plate (41) and a sixth exhaust plate (42) stacked along the third third direction (CC). The plurality of second exhaust assemblies (4) respectively define the first exhaust passage (21) and the second exhaust passage (22).

13. The cooling arrangement (100) of a multi-layered battery pack (200) according to any one of claims 1-12, characterized in that, The first exhaust channel (21) and the second exhaust channel (22) each have a plurality of sub-intake ports (222) on one side of the third direction (CC). The plurality of sub-intake ports (222) are spaced apart along the first direction (AA), and the plurality of sub-intake ports (222) are opposite to the explosion-proof valve (2023) of the cell layer (201).

14. A multi-layered battery pack (200) characterized in that, include: Multiple cell layers (201) are arranged along the third direction (CC); and At least one cooling device (100), at least a portion of the cooling device (100) is disposed between two adjacent cell layers (201), the cooling device (100) being a cooling device (100) for a multilayer battery pack (200) according to any one of claims 1-13.

15. The multi-layer battery pack (200) of claim 14, wherein, Each of the battery cell layers (201) includes a plurality of battery cells (202), the plurality of battery cells (202) are arranged along the second direction (BB), and each of the battery cells (202) extends along the first direction (AA); Each of the battery cells (202) includes a battery cell body (2021), a terminal post (2022), and an explosion-proof valve (2023). The terminal post (2022) is located on one side of the battery cell body (2021) in the first direction (AA), and the explosion-proof valve (2023) is located on the side of the battery cell body (2021) adjacent to the exhaust channel (2) in the third direction (CC).

16. The multi-layer battery pack (200) of claim 15, wherein, The explosion-proof valves (2023) of the plurality of said cells (202) are opposite to the first air inlet (161) of the first exhaust channel (21) or the second air inlet (171) of the second exhaust channel (22).

17. The multi-layer battery pack (200) of claim 14, wherein, Each of the battery cell layers (201) includes a plurality of battery cell groups (203), the plurality of battery cell groups (203) being spaced apart along the first direction (AA), and the plurality of battery cells (202) of each battery cell group (203) being arranged along the second direction (BB); Each of the battery cells (202) includes a battery cell body (2021), a terminal post (2022), and an explosion-proof valve (2023). The terminal post (2022) is located on one side of the battery cell body (2021) in the third direction (CC). On the third direction (CC), the explosion-proof valve (2023) is located on one side of the battery cell body (2021) adjacent to the exhaust channel (2).

18. The multi-layer battery pack (200) of claim 17, wherein, The explosion-proof valves (2023) of two adjacent cells (202) along the third direction (CC) are opposite to each other. A cooling assembly (1), a first exhaust channel (21) and a second exhaust channel (22) are provided between two adjacent cell layers (201). The first exhaust channel (21) and the second exhaust channel (22) are respectively provided on both sides of the cooling assembly (1) along the third direction (CC).

19. The multi-layer battery pack (200) of claim 17, wherein, The explosion-proof valves (2023) of two adjacent cells (202) along the third direction (CC) face the same side. A cooling assembly (1) and a first exhaust channel (21) are provided between two adjacent cell layers (201). The two adjacent cell layers (201) are respectively the first cell layer and the second cell layer. The first exhaust channel (21) is located between the cooling assembly (1) and the explosion-proof valve (2023) of the first cell layer. The second exhaust channel (22) is arranged adjacent to the explosion-proof valve (2023) of the second cell layer.

20. The multi-layer battery pack (200) of claim 17, wherein, The explosion-proof valves (2023) of two adjacent cells (202) along the third direction (CC) are opposite to each other. A cooling assembly (1) is provided between two adjacent cell layers (201). The two adjacent cell layers (201) are respectively the first cell layer and the second cell layer. The first exhaust channel (21) is provided adjacent to the explosion-proof valve (2023) of the first cell layer. The second exhaust channel (22) is provided at the explosion-proof valve (2023) of the second cell layer.

21. A vehicle (1000), characterized in that Includes a multilayer battery pack (200) according to any one of claims 14-20.

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