Battery pack and vehicle

Abstract

The utility model discloses a kind of battery pack and vehicle, it is related to new energy technology field.The battery pack of the utility model includes box, battery module and adsorption device, box includes beam body, beam body is enclosed and defines out and contains cavity, the inside of beam body is also defined with gas guide channel, beam body is equipped with exhaust port and air inlet, exhaust port is communicated gas guide channel and external environment, air inlet is communicated containing cavity and gas guide channel;Battery module is located in containing cavity;Adsorption device is connected with beam body, and at least partially located in gas guide channel, to make the airflow of air inlet can flow through adsorption device after by exhaust port discharge.The battery pack of the application utilizes the cavity in beam body to realize the accommodation of adsorption device, reduces the additional occupation to battery pack internal space, is favorable for improving the energy density of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a battery pack and vehicle. Background Technology

[0002] When power batteries, especially sulfide-based solid-state batteries, experience thermal runaway, they rapidly release large amounts of high-temperature fumes containing high concentrations of toxic, harmful, flammable, and explosive gases such as hydrogen sulfide. If these fumes are discharged directly without effective treatment, they can easily cause safety accidents such as poisoning of on-site personnel, fires, and explosions.

[0003] In existing technologies, adsorption devices are often installed inside the battery pack to treat the flue gas generated during thermal runaway. These devices adsorb toxic and harmful substances in the flue gas to purify it. However, the adsorption devices are separate from the housing and battery modules, resulting in low structural integration. They require a significant amount of assembly space within the battery pack, which in turn reduces the space available for individual battery cells and hinders the improvement of the battery pack's energy density. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack that utilizes a cavity within the beam to accommodate the adsorption device, reducing the additional space occupied inside the battery pack and thus improving the energy density of the battery pack.

[0005] This utility model also proposes a vehicle having the above-mentioned battery pack.

[0006] The battery pack according to a first aspect embodiment of the present invention includes: The box body includes a beam that encloses and defines a cavity. The beam also defines an air guide channel inside. The beam is provided with an exhaust port and an air inlet. The exhaust port connects the air guide channel to the external environment, and the air inlet connects the cavity and the air guide channel. A battery module, wherein the battery module is disposed in the accommodating cavity; An adsorption device is connected to the beam and is at least partially located in the air guide channel so that the airflow from the air inlet can flow through the adsorption device and then be discharged from the exhaust port.

[0007] The battery pack according to the embodiments of the present invention has at least the following beneficial effects: The battery pack of this application is equipped with an adsorption device that can absorb toxic and harmful components such as hydrogen sulfide in the flue gas during thermal runaway. Furthermore, since the adsorption device is partially or entirely located in the air guiding channel, it is housed within the cavity of the beam, reducing the additional space occupied inside the battery pack and thus improving the energy density. Simultaneously, the purified gas is discharged entirely through the air guiding channel within the beam, preventing mixing with untreated flue gas inside the battery pack. This effectively improves purification and depressurization efficiency, ensuring rapid suppression of thermal runaway risks while guaranteeing air quality and passenger safety in the occupant cabin.

[0008] According to some embodiments of the present invention, the beam includes two first side beams extending along a first direction and two second side beams extending along a second direction, the first side beams and the second side beams enclosing and defining the receiving cavity, and the first direction and the second direction intersect each other; The first side beam includes a first beam wall facing the accommodating cavity, the first beam wall is provided with the air inlet, the adsorption device is provided at the air inlet, the adsorption device has an air inlet surface and an air outlet surface arranged opposite to each other along the second direction, and the air inlet surface is arranged facing the battery module.

[0009] According to some embodiments of the present invention, the adsorption device includes a housing and a mounting portion, wherein the mounting portion is disposed at at least one end of the housing along the first direction; The mounting part is connected to the first beam wall.

[0010] According to some embodiments of the present invention, the second side beam includes a second beam wall facing away from the accommodating cavity, and at least one of the second beam walls is provided with the exhaust port; The battery pack also includes an explosion-proof valve, which is located at the vent.

[0011] According to some embodiments of the present invention, the beam further includes at least one first intermediate beam extending along the first direction, the first intermediate beam being located between two first side beams, the first intermediate beam dividing the accommodating cavity into multiple sub-cavities, and the battery module including multiple battery packs, the multiple battery packs being respectively disposed in the multiple sub-cavities; The first intermediate beam includes two third beam walls arranged opposite each other along the second direction, and each of the third beam walls is provided with the air inlet.

[0012] According to some embodiments of the present invention, the beam includes two first side beams extending along a first direction, the adsorption device is disposed in the air guiding channel of the first side beam, and the adsorption device has an air inlet surface and an air outlet surface arranged opposite to each other along the first direction, the air inlet surface being arranged towards the air inlet.

[0013] According to some embodiments of the present invention, the adsorption device includes a housing and a sealing element, wherein the sealing element is disposed on the outside of the housing and abuts against the channel wall of the gas guiding channel.

[0014] According to some embodiments of the present invention, the beam further includes two second side beams extending along a second direction, the first side beam and the second side beams enclosing and defining the receiving cavity, and the second direction intersects with the first direction; The two second side beams are spaced apart along the first direction, the air inlet is located on one of the second side beams, and the exhaust outlet is located on the other second side beam.

[0015] According to some embodiments of the present invention, the beam includes two first side beams extending along a first direction and two second side beams extending along a second direction, the first side beams and the second side beams enclosing and defining the accommodating cavity; The adsorption device includes a housing and partitions disposed in the housing. The partitions are arranged at intervals along a third direction to define a plurality of adsorption channels within the housing. The first direction, the second direction, and the third direction intersect each other. The adsorption device also includes adsorption elements, and each of the adsorption channels is provided with an adsorption element.

[0016] According to some embodiments of the present invention, the adsorption device has an air inlet surface and an air outlet surface, and the adsorption device further includes a filter element disposed on the air inlet surface and connected to the housing.

[0017] The vehicle according to a second aspect of the present invention includes the battery pack described in any of the above embodiments.

[0018] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the battery pack structure in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the connection between the adsorption device and the beam in the embodiment; Figure 3 This is a schematic diagram of the battery pack structure in another embodiment of the present invention; Figure 4 for Figure 3A cross-sectional schematic diagram of the adsorption device disposed in the beam in the embodiment; Figure 5 This is a schematic diagram of the adsorption device in an embodiment of the present invention.

[0020] Figure label: Beam body 100; accommodating cavity 101; sub-cavity 1011; air guide channel 102; air inlet 103; exhaust port 104; first side beam 110; first beam wall 111; second side beam 120; second beam wall 121; first intermediate beam 130; third beam wall 131; second intermediate beam 140; Explosion-proof valve 200; Adsorption device 300; air inlet surface 301; air outlet surface 302; housing 310; adsorption channel 311; mounting part 320; sealing element 330; partition element 340; filter element 350; adsorption element 360; Detailed Implementation The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] In the description of this utility model, the terms "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 utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] When power batteries, especially sulfide-based solid-state batteries, experience thermal runaway, they rapidly release large amounts of high-temperature fumes containing high concentrations of toxic, harmful, flammable, and explosive gases such as hydrogen sulfide. If these fumes are discharged directly without effective treatment, they can easily cause safety accidents such as poisoning of on-site personnel, fires, and explosions.

[0026] In existing technologies, adsorption devices are often installed inside the battery pack to treat the flue gas generated during thermal runaway. These devices adsorb toxic and harmful substances in the flue gas to purify it. However, the adsorption devices are separate from the housing and battery modules, resulting in low structural integration. They require a significant amount of assembly space within the battery pack, which in turn reduces the space available for individual battery cells and hinders the improvement of the battery pack's energy density.

[0027] To address the aforementioned problems, this application proposes a battery pack. For ease of description, the battery pack is defined as having a first direction, a second direction, and a third direction that are mutually perpendicular. The battery pack of this application includes a housing, battery modules, and an adsorption device 300. The housing includes a base plate, a cover plate, and a beam 100, etc. Figure 1 As shown, part of the beam 100 extends along a first direction, and the remaining part of the beam 100 extends along a second direction, thereby enclosing and defining a receiving cavity 101 for accommodating the battery module.

[0028] The beam 100 has a hollow structure, and its internal cavity is configured as an air guide channel 102 for airflow. The beam 100 also has an air inlet 103 and an exhaust outlet 104 communicating with the air guide channel 102. The air inlet 103 is located on the wall of the accommodating cavity 101, thereby connecting the accommodating cavity 101 and the air guide channel 102. The air inlet 103 faces the battery module so that the flue gas generated by the battery module can directly enter the air guide channel 102 through the air inlet 103. The exhaust outlet 104 is located on the outside of the housing, connecting the air guide channel 102 to the external environment, so that the gas purified by adsorption in the air guide channel 102 can be discharged to the external environment of the battery pack, preventing excessive pressure inside the battery pack from causing structural deformation or sealing failure.

[0029] It should be noted that the adsorption device 300 of this application is connected to the beam 100 and is at least partially located in the air guide channel 102, so that the airflow from the inlet 103 can flow through the adsorption device 300 and then be discharged from the outlet 104. It should be noted that, as Figure 1 and Figure 3 As shown, the adsorption device 300 can be embedded in the air guide channel 102 of the beam 100 so that the airflow in the air guide channel 102 can complete adsorption and purification when it flows through the adsorption device 300. Alternatively, the beam 100 has an air inlet 103 on the side facing the battery module that communicates with the air guide channel 102. The adsorption device 300 is disposed at the air inlet 103. When the flue gas in the accommodating cavity 101 enters the air guide channel 102 through the air inlet 103, it is captured and neutralized by the adsorption device 300 and other harmful components such as hydrogen sulfide.

[0030] Based on the above, the battery pack of this application is equipped with an adsorption device 300, which can absorb toxic and harmful components such as hydrogen sulfide in the flue gas during thermal runaway of the battery pack. Furthermore, since the adsorption device 300 is partially or entirely located in the air guiding channel 102, the cavity within the beam 100 accommodates the adsorption device 300, reducing the additional space occupied inside the battery pack and thus improving the energy density of the battery pack. Simultaneously, the gas purified by adsorption is discharged entirely through the air guiding channel 102 within the beam 100, preventing mixing with untreated flue gas inside the battery pack. This effectively improves purification and depressurization efficiency, ensuring that the risk of thermal runaway is rapidly suppressed while guaranteeing air quality and passenger safety in the occupant cabin.

[0031] In some embodiments, such as Figure 1 As shown, the beam 100 includes two first side beams 110 extending along a first direction and two second side beams 120 extending along a second direction. The first side beams 110 and the second side beams 120 enclose and define a receiving cavity 101. The first side beam 110 includes a first beam wall 111 facing the receiving cavity 101, and an air inlet 103 is disposed on the first beam wall 111. An adsorption device 300 is disposed at the air inlet 103. The adsorption device 300 has an air inlet surface 301 and an air outlet surface 302 arranged opposite to each other along the first direction, with the air inlet surface 301 facing the battery module.

[0032] Specifically, the adsorption device 300 closes the air inlet 103 to ensure that all the flue gas in the accommodating cavity 101 enters the air guide channel 102 through the air inlet surface 301 of the adsorption device 300, preventing the flue gas from bypassing the adsorption device 300 and entering the air guide channel 102. It should be noted that because the adsorption device 300 is located at the air inlet 103, the area of ​​the air inlet surface 301 of the adsorption device 300 can match the area of ​​the air inlet 103, thereby increasing the flue gas entry area and improving pressure relief efficiency.

[0033] Furthermore, the adsorption device 300 includes a housing 310 and a mounting portion 320, the mounting portion 320 being disposed at at least one end of the housing 310 along a first direction. For example... Figure 2 In the embodiment shown, both ends of the housing 310 are provided with mounting parts 320, which are connected to the first beam wall 111. The connection methods include, but are not limited to, threaded connection, snap-fit ​​connection and other detachable connection structures, or welding, riveting and other non-detachable connection methods.

[0034] It should be noted that the air inlet surface 301 of the adsorption device 300 can be flush with the first beam wall 111 to minimize the occupancy of the accommodating cavity 101. Alternatively, the air inlet surface 301 of the adsorption device 300 can protrude from the first beam wall 111 to increase the thickness of the adsorption device 300 and thus improve its purification capacity.

[0035] Additionally, the second side beam 120 includes a second beam wall 121 facing away from the accommodating cavity 101, and at least one second beam wall 121 is provided with an exhaust port 104. It should be noted that there can be one or more exhaust ports 104, but their location must be downstream of the adsorption device 300 to ensure that the gas in the gas guiding channel 102 can only be discharged through the exhaust port 104 after adsorption and purification are completed. Figure 1 In the embodiment shown, the battery pack also includes an explosion-proof valve 200, which is located at the vent 104 and can actively or passively open or close the vent 104 to quickly release pressure when the internal pressure of the battery pack exceeds a threshold and maintain the airtightness of the battery pack when the internal pressure of the battery pack is stable below the threshold, thus preventing the intrusion of external impurities.

[0036] Furthermore, the beam 100 may also be provided with at least one first intermediate beam 130 extending along a first direction. The first intermediate beam 130 is located between two first side beams 110, and the first intermediate beam 130 divides the accommodating cavity 101 into multiple sub-cavities 1011. The battery module includes multiple battery packs, and each battery pack is respectively disposed in the multiple sub-cavities 1011. Figure 1 In the illustrated embodiment, the beam 100 is provided with a first intermediate beam 130, wherein the first intermediate beam 130 includes two third beam walls 131 arranged opposite each other along a second direction. Each of the two third beam walls 131 is provided with an air inlet 103, and the air inlet 103 is provided with an adsorption device 300. Thus, air can enter from both sides of the first intermediate beam 130 to achieve adsorption of flue gas in the two side sub-cavities 1011. In some other embodiments, the air inlets 103 on both sides of the first intermediate beam 130 may also share the same adsorption device 300. This adsorption device 300 has air inlet surfaces 301 on both sides along the second direction and air outlet surfaces 302 on one or both sides along the first direction, thereby achieving dual-sided air intake.

[0037] In such Figure 1 In the illustrated embodiment, the beam 100 is further provided with a second intermediate beam 140 extending along a second direction. The second intermediate beam 140 is located between the two second side beams 120, with its two ends connected to the two first side beams 110 respectively, and its middle part connected to the first intermediate beam 130. The second intermediate beam 140 may be provided with an adsorption device 300, or it may be as follows: Figure 1 The diagram shows only the air guide channel 102.

[0038] In some embodiments, the beam 100 includes two first side beams 110 extending along a first direction, and the adsorption device 300 is disposed in the air guiding channel 102 of the first side beam 110. It should be noted that, as... Figure 3 As shown, in this embodiment, the adsorption device 300 is completely embedded inside the first side beam 110 and located in the air guide channel 102 between the air inlet 103 and the air outlet. Thus, the adsorption device 300 has an air inlet surface 301 and an air outlet surface 302 arranged opposite to each other along a first direction, with the air inlet surface 301 positioned close to the air inlet 103. It is understood that the adsorption device 300, in this configuration, does not occupy any internal space within the accommodating cavity 101. The length of the adsorption device 300 matches the length of the first side beam 110, allowing for a longer adsorption device 300. This results in a longer contact time between the flue gas and the adsorption element 360 within the adsorption device 300, which is beneficial for improving the purification effect of the adsorption device 300.

[0039] Furthermore, such as Figure 4 As shown, the adsorption device 300 includes a housing 310 and a sealing element 330. The sealing element 330 is disposed on the outside of the housing 310 and abuts against the channel wall of the air guide channel 102. It is understood that the sealing element 330 is made of a flexible material, such as foam or silicone, which can effectively fill the gap between the housing 310 and the channel wall to prevent flue gas from bypassing the adsorption device 300 through the gap and reducing the purification effect.

[0040] In such Figure 3 In the embodiment shown, an adsorption device 300 is also provided inside the first intermediate beam 130 to form multiple parallel airflow paths with adsorption function with the first side beam 110, thereby improving purification efficiency.

[0041] Furthermore, such as Figure 3 As shown, two second side beams 120 are spaced apart along the first direction. An air inlet 103 is located on one of the second side beams 120, and an exhaust outlet 104 is located on the other second side beam 120, so that the airflow can flow completely through the first side beam 110 and part of the second side beam 120, thereby having a longer flow path. This is beneficial for accommodating more flue gas and improving adsorption efficiency during thermal runaway, and for mitigating the pressure rise rate inside the battery pack.

[0042] In some embodiments, such as Figure 5 As shown, the adsorption device 300 includes a housing 310 and partitions 340 disposed within the housing 310. The partitions 340 are spaced apart along a third direction to form multiple adsorption channels 311 arranged along the third direction within the housing 310. The adsorption device 300 also includes adsorption elements 360, with each adsorption channel 311 containing an adsorption element 360. The partitions 340 not only increase the contact area between the flue gas and the adsorption elements 360 but also help reduce the flow resistance when the gas passes through the adsorption device 300, resulting in a more uniform airflow distribution. This facilitates the rapid outflow of air from the adsorption device 300 and prevents the rapid increase in pressure within the battery pack during thermal runaway from damaging the sealing structure of the housing.

[0043] Furthermore, the adsorption device 300 also includes a filter element 350, which is located on the air inlet surface 301 and connected to the housing 310. It should be noted that the filter element 350 has a mesh or porous structure, which can effectively intercept large particulate impurities in the flue gas, preventing them from clogging the adsorption channel 311 or contaminating the adsorption element 360, thereby ensuring the stable operation of the adsorption device 300. The filter element 350 can be any of a filter screen or filter cotton, or a combination of both. For example, filter cotton can be placed after the filter screen, allowing particulate impurities that the filter screen cannot intercept to be further filtered out by the filter cotton, reducing the probability of impurities entering the adsorption channel 311.

[0044] The second aspect of this application also proposes a vehicle that includes the battery pack described in any of the foregoing embodiments. It should be noted that the vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck; the vehicle can be a new energy vehicle, such as a hybrid vehicle or a pure electric vehicle. Since the vehicle in this aspect of the embodiment includes the battery pack of the above embodiments, it possesses all the aforementioned technical effects, which will not be repeated here.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery pack, characterized in that, include: The box body includes a beam that encloses and defines a cavity. The beam also defines an air guide channel inside. The beam is provided with an exhaust port and an air inlet. The exhaust port connects the air guide channel to the external environment, and the air inlet connects the cavity and the air guide channel. A battery module, wherein the battery module is disposed in the accommodating cavity; An adsorption device is connected to the beam and is at least partially located in the air guide channel so that the airflow from the air inlet can flow through the adsorption device and then be discharged from the exhaust port.

2. The battery pack according to claim 1, characterized in that, The beam includes two first side beams extending along a first direction and two second side beams extending along a second direction. The first side beams and the second side beams enclose and define the receiving cavity. The first direction and the second direction intersect. The first side beam includes a first beam wall facing the accommodating cavity, the first beam wall is provided with the air inlet, the adsorption device is provided at the air inlet, the adsorption device has an air inlet surface and an air outlet surface arranged opposite to each other along the second direction, and the air inlet surface is arranged facing the battery module.

3. The battery pack according to claim 2, characterized in that, The adsorption device includes a housing and a mounting portion, wherein the mounting portion is disposed at at least one end of the housing along the first direction; The mounting part is connected to the first beam wall.

4. The battery pack according to claim 2, characterized in that, The second side beam includes a second beam wall facing away from the accommodating cavity, and at least one of the second beam walls is provided with the exhaust port; The battery pack also includes an explosion-proof valve, which is located at the vent.

5. The battery pack according to claim 2, characterized in that, The beam body also includes at least one first intermediate beam extending along the first direction. The first intermediate beam is located between two first side beams. The first intermediate beam divides the accommodating cavity into multiple sub-cavities. The battery module includes multiple battery packs, and the multiple battery packs are respectively disposed in the multiple sub-cavities. The first intermediate beam includes two third beam walls arranged opposite each other along the second direction, and each of the third beam walls is provided with the air inlet.

6. The battery pack according to claim 1, characterized in that, The beam includes two first side beams extending along a first direction. The adsorption device is disposed in the air guiding channel of the first side beam. The adsorption device has an air inlet surface and an air outlet surface arranged opposite to each other along the first direction. The air inlet surface is arranged facing the air inlet.

7. The battery pack according to claim 6, characterized in that, The adsorption device includes a housing and a sealing element. The sealing element is disposed on the outside of the housing and abuts against the channel wall of the gas guiding channel.

8. The battery pack according to claim 6, characterized in that, The beam also includes two second side beams extending along a second direction, the first side beam and the second side beams enclosing and defining the receiving cavity, the second direction intersecting the first direction; The two second side beams are spaced apart along the first direction, the air inlet is located on one of the second side beams, and the exhaust outlet is located on the other second side beam.

9. The battery pack according to claim 1, characterized in that, The beam includes two first side beams extending along a first direction and two second side beams extending along a second direction, the first side beams and the second side beams enclosing and defining the receiving cavity; The adsorption device includes a housing and partitions disposed in the housing. The partitions are arranged at intervals along a third direction to define a plurality of adsorption channels within the housing. The first direction, the second direction, and the third direction intersect each other. The adsorption device also includes adsorption elements, and each of the adsorption channels is provided with an adsorption element.

10. The battery pack according to claim 9, characterized in that, The adsorption device has an air inlet surface and an air outlet surface, and the adsorption device also includes a filter element, which is disposed on the air inlet surface and connected to the housing.

11. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1 to 10.

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