Battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and a power utilization device, the battery pack comprises a box body, single batteries, an exhaust pipe and a sealing element, a cooling cavity, an exhaust cavity and a partition beam are arranged in the box body, the cooling cavity and the exhaust cavity are separated by the partition beam, and equivalently, the partition beam is arranged in the box body in a subdivision manner; and the air inlet of the exhaust pipe is opposite to the anti-explosion valve of the battery monomer, so that a directional exhaust path is established between the valve port of the anti-explosion valve and the air guide channel. And the sealing element is arranged between the exhaust pipe and the anti-explosion valve, so that high-temperature eruption substances are allowed to be smoothly introduced into the gas guide pipe, the high-temperature eruption substances are prevented from overflowing to the cooling cavity from a gap between the exhaust pipe and the battery monomers, and meanwhile, the reverse infiltration of the insulating cooling liquid is prevented. The partition beam is provided with the through hole, the through hole is communicated with the air outlet of the exhaust pipe, and high-temperature eruptions in the air guide channel flow into the independent exhaust cavity through the air outlet and the through hole, so that deformation or fracture of the box body caused by instantaneous pressure sudden increase of the cooling cavity is effectively avoided, and the risk of sealing failure of the battery pack is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Technology

[0002] Currently, immersion cooling is a new type of battery thermal management technology that achieves efficient heat dissipation and safety protection by completely immersing battery cells or modules in insulating coolant.

[0003] While existing submerged battery packs offer unique advantages in terms of thermal safety, thermal runaway in a single battery cell can cause a sudden ejection of high-temperature, high-pressure substances. This leads to a rapid increase in pressure within the submerged space of the battery pack, and the ejected material cannot escape from the submerged space. This can easily result in problems such as submerged space seal failure, leakage of insulating coolant, and the potential impact of the high-temperature ejected material on surrounding battery cells.

[0004] In summary, existing submersible battery packs cannot guide high-temperature ejected materials out of the immersion space when thermal runaway occurs. Excessive pressure in the immersion space leads to problems such as sealing failure, leakage of insulating coolant, and reduced thermal safety protection performance. Utility Model Content

[0005] The technical problem to be solved by this utility model is that existing submersible battery packs cannot guide high-temperature ejected material out of the immersion space when thermal runaway occurs, resulting in excessive pressure in the immersion space, sealing failure, leakage of insulating coolant, and reduced thermal safety protection performance.

[0006] To solve the above-mentioned technical problems, this utility model provides a technical solution for a battery pack:

[0007] Battery pack, with third-party orientation, including:

[0008] The housing includes a cooling chamber, an exhaust chamber, and a partition beam. The partition beam is located between the cooling chamber and the exhaust chamber to separate them.

[0009] A battery cell is located in the cooling chamber, and an explosion-proof valve is provided on one side of the battery cell along the third direction;

[0010] An exhaust pipe is installed in the cooling chamber and faces the explosion-proof valve. The exhaust pipe has an air guide channel and an air inlet and an air outlet that connect the air guide channel. The air inlet and the explosion-proof valve are arranged opposite each other in the third direction. The partition beam has a through hole that connects to the air outlet to connect the air guide channel and the exhaust chamber.

[0011] A seal is located between the exhaust pipe and the explosion-proof valve to form a seal between the exhaust pipe and the battery cell.

[0012] Furthermore, the seal includes a first sealing layer that covers the side of the exhaust pipe near the battery cell and seals the air inlet.

[0013] Furthermore, the sealing element also includes a second sealing layer, which is disposed between the first sealing layer and the explosion-proof valve. The second sealing layer has a perforation, which is disposed opposite to the explosion-proof valve in the third direction.

[0014] Furthermore, the sealing element is an integral sealing layer, and a weak part is provided on the side of the sealing element near the battery cell. The weak part and the explosion-proof valve are arranged opposite each other in the third direction, and the weak part is sealed to the air inlet.

[0015] Furthermore, the battery pack also has a first direction and a second direction, the first direction and the second direction being perpendicular to each other with respect to the third direction; the cooling chamber and the exhaust chamber are arranged at intervals along the first direction, the partition beam extends along the second direction, and the exhaust pipe extends along the first direction; the end of the exhaust pipe near the air outlet is provided with a connecting part, and the connecting part is connected to the partition beam.

[0016] Furthermore, the battery pack also includes a transition structure disposed between the exhaust pipe and the partition beam. The transition structure has a transition channel, a first interface is provided on the side of the transition structure facing the connection part along the third direction, and a second interface is provided on the side of the transition structure facing the partition beam along the first direction. The transition channel is connected to the first interface and the second interface respectively.

[0017] The first interface is connected to the air outlet, and the second interface is connected to the through hole.

[0018] Furthermore, the connecting part is an ear plate structure, the connecting part is connected to the adapter structure by fasteners, and an adhesive layer is provided between the connecting part and the adapter structure.

[0019] Furthermore, the housing includes side beams, a cover plate, and a bottom plate, with the cover plate and the bottom plate spaced apart along the third direction, and the side beams fixedly connected to the cover plate and the bottom plate respectively; the exhaust pipe has a first side disposed away from the battery cell, and the first side is fixedly connected to the cover plate.

[0020] Furthermore, the exhaust pipe is fitted onto the side of the cover plate near the cooling chamber, and the exhaust pipe also has a second side near the battery cell, the second side being sealed to the end face of the battery cell in the third direction.

[0021] To solve the above-mentioned technical problems, this utility model also provides a technical solution for an electrical device:

[0022] The electrical device includes the battery pack described in any of the above technical solutions.

[0023] Compared with the prior art, the battery pack and power device of this utility model have the following advantages: the battery pack adopts a design of box, battery cell, exhaust pipe and sealing element. The box is provided with cooling chamber, exhaust chamber and partition beam. The cooling chamber and exhaust chamber are separated by partition beam, which is equivalent to a compartment layout in the box. The air guide channel of exhaust pipe is completely isolated from cooling chamber. The air inlet is aligned with the explosion-proof valve of battery cell, so that a directional exhaust path is established between the valve port of explosion-proof valve and air guide channel.

[0024] In the event of thermal runaway, the high-temperature ejected material enters the gas duct through the explosion-proof valve, preventing it from spreading throughout the cooling chamber. A seal is installed between the exhaust pipe and the explosion-proof valve, which allows the high-temperature ejected material to smoothly enter the gas inlet of the gas duct while preventing it from overflowing into the cooling chamber from the gap between the exhaust pipe and the battery cell. At the same time, it prevents the insulating coolant from seeping back in, ensuring the unobstructed and sealed exhaust path.

[0025] The partition beam has through holes that connect to the exhaust port of the exhaust pipe. High-temperature ejected material in the air guide channel flows through the exhaust port and the through holes in the partition beam, ultimately flowing into an independent exhaust chamber. This allows high-temperature, high-pressure materials to accumulate in a dedicated exhaust space, effectively preventing deformation or rupture of the cooling chamber due to sudden pressure increases, thus significantly reducing the risk of battery pack seal failure. Furthermore, because the exhaust pipe's air guide channel is isolated from the cooling chamber, the possibility of leakage between the high-temperature ejected material and the insulating coolant is eliminated, preventing coolant leakage and excessive temperature fluctuations, thus blocking the thermal runaway chain reaction and improving the battery pack's thermal safety performance. Attached Figure Description

[0026] Figure 1 This is an exploded view of the battery pack in an embodiment of this utility model;

[0027] Figure 2 This is a cross-sectional schematic diagram of the battery pack along the first direction in an embodiment of this utility model;

[0028] Figure 3 This is an assembly cross-sectional view of the exhaust pipe and the battery cell in an embodiment of this utility model;

[0029] Figure 4 This is an assembly cross-sectional view of the exhaust pipe and the battery cell in another embodiment of this utility model;

[0030] Figure 5 yes Figure 2 Enlarged schematic diagram of the battery pack at the junction structure;

[0031] Figure 6 This is an assembly perspective view of the transition structure and the partition beam in an embodiment of this utility model;

[0032] In the diagram: 1-box body, 11-cooling chamber, 12-exhaust chamber, 13-partition beam, 130-through hole, 14-side beam, 15-cover plate, 16-bottom plate, 2-cell battery, 20-explosion-proof valve, 3-exhaust pipe, 30-air duct, 31-air inlet, 32-air outlet, 33-connection part, 34-adhesive layer, 35-fastener, 36-first side, 37-second side, 4-sealant, 41-first sealing layer, 42-second sealing layer, 420-perforation, 43-integrated sealing layer, 430-weak part, 5-transfer structure, 50-transfer channel, 51-first interface, 52-second interface, X-first direction, Y-second direction, Z-third direction. Detailed Implementation

[0033] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] In the description of this utility model, 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," and "counterclockwise" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] like Figures 1 to 3 As shown, a battery pack according to an embodiment of the present invention has a third direction Z and includes: a housing 1, a battery cell 2, an exhaust pipe 3 and a sealing element 4. The housing 1 is provided with a cooling chamber 11, an exhaust chamber 12 and a partition beam 13. The partition beam 13 is located between the cooling chamber 11 and the exhaust chamber 12 to separate the cooling chamber 11 and the exhaust chamber 12. The battery cell 2 is located in the cooling chamber 11. An explosion-proof valve 20 is provided on one side of the battery cell 2 along the third direction Z.

[0038] The exhaust pipe 3 is installed in the cooling chamber 11 and faces the explosion-proof valve 20. The exhaust pipe 3 is provided with an air guide channel 30 and an air inlet 31 and an air outlet 32 ​​that connect the air guide channel 30. The air inlet 31 and the explosion-proof valve 20 are arranged opposite each other in the third direction Z. The partition beam 13 has a through hole 130, which is connected to the air outlet 32 ​​to connect the air guide channel 30 and the exhaust chamber 12. The sealing element 4 is located between the exhaust pipe 3 and the explosion-proof valve 20 to form a seal between the exhaust pipe 3 and the battery cell 2.

[0039] The battery pack adopts a design consisting of a housing 1, battery cells 2, exhaust pipes 3, and seals 4. The housing 1 is equipped with a cooling chamber 11, an exhaust chamber 12, and a partition beam 13. The cooling chamber 11 and the exhaust chamber 12 are separated by the partition beam 13, which is equivalent to a compartmentalized layout within the housing 1. The air guide channel 30 of the exhaust pipe 3 is completely isolated from the cooling chamber 11, and the air inlet 31 is aligned with the explosion-proof valve 20 of the battery cell 2, so that a directional exhaust path is established between the valve port of the explosion-proof valve 20 and the air guide channel 30.

[0040] When thermal runaway occurs, the high-temperature ejected material enters the gas guide channel 30 through the explosion-proof valve 20, preventing it from spreading into the entire cooling chamber 11. Furthermore, a sealing element 4 is provided between the exhaust pipe 3 and the explosion-proof valve 20, which allows the high-temperature ejected material to smoothly enter the air inlet 31 of the gas guide pipe, while preventing the high-temperature ejected material from overflowing into the cooling chamber 11 from the gap between the exhaust pipe 3 and the battery cell 2. At the same time, it prevents the insulating coolant from seeping in reverse, ensuring the unobstructed and sealed exhaust path.

[0041] The partition beam 13 has a through hole 130, which connects to the outlet 32 ​​of the exhaust pipe 3. The high-temperature ejected material in the air guide channel 30 flows through the outlet 32 ​​and the through hole 130 of the partition beam 13, eventually flowing into the independent exhaust chamber 12. This allows the high-temperature, high-pressure material to accumulate in a dedicated exhaust space, effectively preventing the cooling chamber 11 from deforming or cracking due to a sudden increase in pressure, thus significantly reducing the risk of battery pack sealing failure. In addition, since the air guide channel 30 of the exhaust pipe 3 is isolated from the cooling chamber 11, the possibility of leakage contact between the high-temperature ejected material and the insulating coolant is eliminated, preventing the insulating coolant from leaking outward and excessive temperature fluctuations, thus blocking the thermal runaway chain reaction and improving the thermal safety protection performance of the battery pack.

[0042] In this embodiment, the sealing element 4 includes a first sealing layer 41, which covers the side of the exhaust pipe 3 near the battery cell 2 and seals the air inlet 31. Furthermore, the sealing element 4 also includes a second sealing layer 42, which is disposed between the first sealing layer 41 and the explosion-proof valve 20. The second sealing layer 42 has a through-hole 420, which is positioned opposite to the explosion-proof valve 20 in the third direction Z. The sealing element 4 employs a double-sealing-layer design, which effectively seals the gap between the air inlet 31 and the exhaust pipe 3 and the battery cell 2, and is also rapidly destroyed during thermal eruption, allowing the high-temperature ejected material to enter the air guide channel 30 through the explosion-proof valve 20 and the air inlet 31.

[0043] To meet different usage requirements, in other implementations, such as Figure 4 As shown, the seal 4 is an integral sealing layer 43. A weak portion 430 is provided on the side of the seal 4 closest to the battery cell 2. The weak portion 430 and the explosion-proof valve 20 are positioned opposite each other in the third direction Z. The weak portion 430 is sealed to the air inlet 31. Specifically, the weak portion 430 has a groove structure. Because the thickness of the weak portion 430 is smaller than the overall thickness of the seal 4, it can effectively seal the gap between the air inlet 31 and the exhaust pipe 3 and the battery cell 2, and is rapidly destroyed during thermal eruption, allowing the high-temperature ejected material to smoothly enter the air guide channel 30.

[0044] In this embodiment, the battery pack also has a first direction X and a second direction Y, which are perpendicular to each other. The cooling chamber 11 and the exhaust chamber 12 are arranged at intervals along the first direction X, the partition beam 13 extends along the second direction Y, and the exhaust pipe 3 extends along the first direction X. The end of the exhaust pipe 3 near the air outlet 32 ​​is provided with a connecting part 33, which is connected to the partition beam 13. Inside the housing 1, the layout of the cooling chamber 11, the exhaust chamber 12, the partition beam 13, and the exhaust pipe 3 is reasonable, ensuring the utilization rate of the internal space of the housing 1.

[0045] As a further preferred option, such as Figure 5 , Figure 6 As shown, the battery pack also includes a transition structure 5 disposed between the exhaust pipe 3 and the partition beam 13. The transition structure 5 has a transition channel 50. The transition structure 5 has a first interface 51 on the side facing the connecting part 33 along the third direction Z, and a second interface 52 on the side facing the partition beam 13 along the first direction X. The transition channel 50 communicates with the first interface 51 and the second interface 52 respectively. The first interface 51 communicates with the air outlet 32, and the second interface 52 communicates with the through hole 130. The transition structure 5, disposed between the exhaust pipe 3 and the partition beam 13, can provide a positioning connection for the exhaust pipe 3 and form a reliable conductive connection between the air outlet 32 ​​and the through hole 130.

[0046] Specifically, the connecting part 33 is an ear plate structure, and a fastener 35 connects the connecting part 33 and the adapter structure 5. An adhesive layer 34 is provided between the connecting part 33 and the adapter structure 5. The exhaust pipe 3 and the adapter structure 5 are securely connected by the ear plate structure, the fastener 35, and the adhesive layer 34 to prevent changes in the connection position caused by vibration, thereby preventing leakage of the air guide channel 30.

[0047] In addition, the housing 1 includes side beams 14, a cover plate 15, and a bottom plate 16. The cover plate 15 and the bottom plate 16 are arranged at intervals along the third direction Z. The side beams 14 are fixedly connected to the cover plate 15 and the bottom plate 16 respectively. The exhaust pipe 3 has a first side 36 located away from the battery cell 2, and the first side 36 is fixedly connected to the cover plate 15. The exhaust pipe 3 is fitted onto the side of the cover plate 15 near the cooling chamber 11. The exhaust pipe 3 also has a second side 37 located near the battery cell 2, and the second side 37 is sealed to the end face of the battery cell 2 in the third direction Z. The exhaust pipe 3 forms an effective connection with both the housing 1 and the battery cell 2, improving the installation reliability of the exhaust pipe 3 in the housing 1, thereby ensuring that the exhaust channel 30 will not be misaligned or leak due to vibration.

[0048] The specific embodiments of the electrical device of this utility model include a battery pack. The specific embodiments of the battery pack in the specific embodiments of the battery pack of this utility model are the same, and will not be repeated here.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack having a third orientation (Z), characterized in that, include: The housing (1) is provided with a cooling chamber (11), an exhaust chamber (12) and a partition beam (13) inside the housing (1). The partition beam (13) is located between the cooling chamber (11) and the exhaust chamber (12) to separate the cooling chamber (11) and the exhaust chamber (12). A battery cell (2) is located in the cooling chamber (11) along the third direction (Z), and an explosion-proof valve (20) is provided on one side of the battery cell (2); An exhaust pipe (3) is installed in the cooling chamber (11) and faces the explosion-proof valve (20). The exhaust pipe (3) is provided with an air guide channel (30) and an air inlet (31) and an air outlet (32) that connect the air guide channel (30). The air inlet (31) and the explosion-proof valve (20) are arranged opposite to each other in the third direction (Z). The partition beam (13) is provided with a through hole (130) that connects to the air outlet (32) to connect the air guide channel (30) and the exhaust chamber (12). A seal (4) is located between the exhaust pipe (3) and the explosion-proof valve (20) to form a seal between the exhaust pipe (3) and the battery cell (2).

2. The battery pack according to claim 1, characterized in that, The seal (4) includes a first sealing layer (41) which covers the exhaust pipe (3) on the side near the battery cell (2) and seals the air inlet (31).

3. The battery pack according to claim 2, characterized in that, The sealing element (4) further includes a second sealing layer (42), which is disposed between the first sealing layer (41) and the explosion-proof valve (20). The second sealing layer (42) has a perforation (420), which is disposed opposite to the explosion-proof valve (20) in the third direction (Z).

4. The battery pack according to claim 1, characterized in that, The sealing element (4) is an integral sealing layer (43). The sealing element (4) has a weak part (430) on the side close to the battery cell (2). The weak part (430) and the explosion-proof valve (20) are arranged opposite to each other in the third direction (Z). The weak part (430) is sealed to the air inlet (31).

5. The battery pack according to claim 1, characterized in that, The battery pack also has a first direction (X) and a second direction (Y), which are perpendicular to each other. The cooling chamber (11) and the exhaust chamber (12) are arranged at intervals along the first direction (X), the partition beam (13) extends along the second direction (Y), and the exhaust pipe (3) extends along the first direction (X). The exhaust pipe (3) has a connecting part (33) at its end near the air outlet (32), and the connecting part (33) is connected to the partition beam (13).

6. The battery pack according to claim 5, characterized in that, The battery pack also includes a transition structure (5) disposed between the exhaust pipe (3) and the partition beam (13). The transition structure (5) is provided with a transition channel (50). The transition structure (5) is provided with a first interface (51) on the side facing the connecting part (33) along the third direction (Z). The transition structure (5) is provided with a second interface (52) on the side facing the partition beam (13) along the first direction (X). The transition channel (50) is connected to the first interface (51) and the second interface (52) respectively. The first interface (51) is connected to the air outlet (32), and the second interface (52) is connected to the through hole (130).

7. The battery pack according to claim 6, characterized in that, The connecting part (33) is an ear plate structure. The connecting part (33) is connected to the adapter structure (5) by fasteners (35), and an adhesive layer (34) is provided between the connecting part (33) and the adapter structure (5).

8. The battery pack according to claim 1, characterized in that, The housing (1) includes a side beam (14), a cover plate (15) and a bottom plate (16). The cover plate (15) and the bottom plate (16) are arranged at intervals along the third direction (Z). The side beam (14) is fixedly connected to the cover plate (15) and the bottom plate (16) respectively. The exhaust pipe (3) has a first side (36) located away from the battery cell (2). The first side (36) is fixedly connected to the cover plate (15).

9. The battery pack according to claim 8, characterized in that, The exhaust pipe (3) is fitted to the side of the cover plate (15) near the cooling chamber (11). The exhaust pipe (3) also has a second side (37) near the battery cell (2). The second side (37) is sealed to the end face of the battery cell (2) in the third direction (Z).

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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