Edge beam, battery pack shell, battery pack and vehicle

Abstract

The invention provides a boundary beam, a battery pack shell, a battery pack and a vehicle, and relates to the technical field of battery packs. The boundary beam is used for defining a containing cavity of a battery pack and comprises a beam body and a cold plate, the beam body defines an exhaust channel, the side, facing the containing cavity, of the beam body is provided with an opening communicated with the exhaust channel, and the beam body is further provided with an exhaust port capable of being opened and closed; the cold plate blocks the opening and is connected with the beam body, at least part of the structure of the cold plate extends into the exhaust channel, and the cold plate is further provided with an air inlet used for communicating the exhaust channel with the containing cavity. The boundary beam provided by the invention is beneficial to reducing the temperature of gas exhausted from the battery pack and improving the safety of the battery pack.

Description

Technical Field

[0001] This application relates to the technical field of battery packs, and particularly to a side beam, a battery pack housing, a battery pack, and a vehicle. Background Art

[0002] The battery pack is an important part of a vehicle. When a failure such as thermal runaway occurs in the battery pack, a large amount of high-temperature gas will be generated inside the battery pack. Therefore, a pressure relief structure needs to be provided on the battery pack housing to quickly discharge the gas and prevent explosion.

[0003] In the prior art, exhaust holes are provided on the side beam of the battery pack. When the air pressure inside the battery pack is high, the exhaust holes are opened to discharge the gas inside the battery pack.

[0004] However, the high-temperature gas generated inside the battery pack may contain combustible gas. The contact between the high-temperature combustible gas and the air outside the battery pack may cause an explosion, posing a safety hazard. Summary of the Invention

[0005] This application provides a side beam, a battery pack housing, a battery pack, and a vehicle, which is beneficial to reducing the temperature of the gas discharged from the battery pack and improving the safety of the battery pack.

[0006] In a first aspect, this application provides a side beam for enclosing a receiving cavity of a battery pack, including: a beam main body that defines an exhaust passage, the beam main body has an opening communicating with the exhaust passage on a side facing the receiving cavity, and the beam main body also has an openable and closable exhaust port; a cold plate that seals the opening and is connected to the beam main body, at least a part of the structure of the cold plate extends into the exhaust passage, and an air inlet for communicating the exhaust passage and the receiving cavity is also provided on the cold plate.

[0007] In a possible implementation manner, the cold plate includes: a plate main body that is connected to the beam main body and seals the opening, the plate main body is provided with a cooling flow passage suitable for the flow of coolant, and the air inlet penetrates the plate main body; a heat exchange fin that is arranged on a side of the plate main body facing the exhaust passage and extends into the exhaust passage.

[0008] In a possible implementation manner, a plurality of partition ribs are provided on a side wall of the beam main body opposite to the opening, the partition ribs abut against the plate main body, the plurality of partition ribs are arranged at intervals along the height direction of the beam main body, and the exhaust passage is divided into a plurality of sub-channels, and at least one heat exchange fin is provided in each sub-channel.

[0009] In a possible implementation manner, the partition rib includes a first extension section and a second extension section, the first extension section is perpendicular to the height direction of the side beam, the second extension section is parallel to the height direction of the side beam, and the second extension section is located at one end of the first extension section facing the opening and abuts against the plate main body.

[0010] In a possible implementation, it further includes: a seal, and there are multiple seals corresponding to the partition ribs one by one, and each seal is disposed between the corresponding partition rib and the plate body.

[0011] In a possible implementation, a communication port is opened on each partition rib, and the communication port is used to communicate the sub-channels on both sides of the partition rib.

[0012] In a possible implementation, it further includes: a piston assembly, and the piston assembly is correspondingly connected to the exhaust port; the piston assembly is configured to close the exhaust port when the air pressure in the exhaust passage is less than or equal to the air pressure outside the side beam, and open the exhaust port when the air pressure in the exhaust passage is greater than the air pressure outside the side beam.

[0013] In a possible implementation, the piston assembly includes a piston, a guide post, a limiting member and an elastic member. The piston is movable along the opening direction of the exhaust port; the guide post is located in the exhaust passage, and one end of the guide post is connected to the piston, and the other end of the guide post is connected to the limiting member; the elastic member is sleeved on the guide post, and the first end of the elastic member is connected to the limiting member, and the second end of the elastic member is connected to the inner wall of the exhaust passage; when the air pressure in the exhaust passage is less than or equal to the air pressure outside the side beam, the piston is in sealing cooperation with the exhaust port to close the exhaust port; when the air pressure in the exhaust passage is greater than the air pressure outside the side beam, the piston moves away from the exhaust passage along the axial direction of the guide post to open the exhaust port.

[0014] In a possible implementation, the beam body further includes a support plate; the exhaust port is opened on the support plate, the guide post passes through the support plate, and the second end of the elastic member is connected to the support plate.

[0015] In a second aspect, the present application provides a battery pack housing, including any one of the above side beams.

[0016] In a third aspect, the present application provides a battery pack, including: the battery pack housing of the second aspect, the battery pack housing defines an accommodation cavity; a battery cell module, the battery cell module is disposed in the accommodation cavity; a cooling main board, the cooling main board is in heat exchange contact with the battery cell module, and the cooling main board is communicated with a cold plate.

[0017] In a fourth aspect, the present application provides a vehicle, including the battery pack of the third aspect.

[0018] The side beam, battery pack housing, battery pack, and vehicle provided by the embodiments of the present application. The side beam is provided with a beam main body and a cold plate. The beam main body defines an exhaust passage. The cold plate is connected to the beam main body to block the opening of the exhaust passage facing the accommodation cavity of the battery pack. An air inlet is provided on the cold plate, and an openable and closable exhaust port is provided on the beam main body. When the battery pack is operating normally, the exhaust port remains closed, thereby ensuring that the accommodation cavity remains closed. When a large amount of high-temperature gas is generated in the accommodation cavity, the exhaust port opens, and the gas in the accommodation cavity enters the exhaust passage through the air inlet and finally discharges from the exhaust port of the battery pack. In this way, when high-temperature gas is generated in the accommodation cavity, the high-temperature gas will first pass through the cold plate and then enter the exhaust passage, and the gas will always be in contact with the cold plate for heat exchange during the flow in the exhaust passage. Therefore, the temperature of the gas discharged from the battery pack can be effectively reduced, and the possibility of explosion when the discharged gas contacts the air can be reduced, which is beneficial to improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0020] Figure 1 Structural schematic diagram of the side beam provided by the embodiments of the present application;

[0021] Figure 2 is Figure 1 exploded view of the side beam in

[0022] Figure 3 is Figure 2 exploded view of the cold plate in

[0023] Figure 4 Structural schematic diagram of the plate main body of the cold plate provided by the embodiments of the present application;

[0024] Figure 5 Structural schematic diagram of the beam main body of the side beam provided by the embodiments of the present application;

[0025] Figure 6 is Figure 1 A-A cross-sectional view of the side beam in

[0026] Figure 7 is Figure 2 structural schematic diagram of the piston assembly in

[0027] Figure 8 Use state diagram of the side beam in the battery pack provided by the embodiments of the present application;

[0028] Figure 9 Another use state diagram of the side beam in the battery pack provided by the embodiments of the present application.

[0029] Description of reference numerals:

[0030] 100 - Side beam;

[0031] 110 - Beam main body;

[0032] 111 - Exhaust passage;

[0033] 1111 - Exhaust port;

[0034] 112 - Partition rib;

[0035] 1121 - First extension section;

[0036] 1122 - Second extension section;

[0037] 1123 - Communication port;

[0038] 113 - Support plate;

[0039] 120 - Cold plate;

[0040] 121 - Plate main body;

[0041] 1211 - Intake port;

[0042] 1212 - Cooling flow channel;

[0043] 1213 - Water nozzle;

[0044] 1214 - Plug;

[0045] 122 - Heat exchange fin;

[0046] 130 - Seal;

[0047] 140 - Piston assembly;

[0048] 141 - Piston;

[0049] 142 - Guide post;

[0050] 143 - Limiting part;

[0051] 144 - Elastic part;

[0052] 150 - Sealing ring;

[0053] 10 - Battery pack housing;

[0054] 11 - Accommodating cavity;

[0055] 20 - Battery cell module;

[0056] 30 - Cooling main board.

[0057] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by reference to specific embodiments. Detailed Description of the Embodiments

[0058] Here, exemplary embodiments will be described in detail, and examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0059] As shown in the background art, in the prior art, exhaust holes are provided on the side beam of the battery pack. When the air pressure in the battery pack is high, the exhaust holes are opened to discharge the gas in the battery pack. However, the high-temperature gas generated in the battery pack may contain combustible gas, and the contact between the high-temperature combustible gas and the air outside the battery pack may cause an explosion, posing a safety hazard.

[0060] To solve the above technical problems, the embodiments of the present application provide a side beam, a battery pack housing, a battery pack, and a vehicle. The side beam is provided with a beam body and a cold plate. The beam body defines an exhaust passage. The cold plate is connected to the beam body to block the opening of the exhaust passage facing the accommodation cavity of the battery pack. An intake port is provided on the cold plate, and an openable and closable exhaust port is provided on the beam body. When the battery pack is operating normally, the exhaust port remains closed to ensure that the accommodation cavity remains closed. When a large amount of high-temperature gas is generated in the accommodation cavity, the exhaust port opens, and the gas in the accommodation cavity enters the exhaust passage through the intake port and finally is discharged from the battery pack through the exhaust port. In this way, when high-temperature gas is generated in the accommodation cavity, the high-temperature gas will first pass through the cold plate and then enter the exhaust passage, and the gas is always in contact with the cold plate for heat exchange during the flow in the exhaust passage. Therefore, the temperature of the gas discharged from the battery pack can be effectively reduced, and the possibility of explosion due to the contact between the discharged gas and the air can be reduced, which is beneficial to improving the safety of the battery pack.

[0061] The following uses specific embodiments to describe in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems. The following several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings:

[0062] It should be noted that the side beam provided by the embodiments of the present application can be applied to various different battery pack housings.

[0063] SeeFigure 1 , Figure 2 and Figure 9 As shown in Figure 1 , Figure 2 and Figure 9 , the side beam 100 of the embodiment of the present application is used to enclose the accommodation cavity 11 of the battery pack, and includes: a beam main body 110 and a cold plate 120. The beam main body 110 defines an exhaust passage 111. The side of the beam main body 110 facing the accommodation cavity 11 has an opening communicating with the exhaust passage 111. The beam main body 110 also has an exhaust port 1111 that can be opened and closed. The cold plate 120 seals the opening and is connected to the beam main body 110. At least part of the structure of the cold plate 120 extends into the exhaust passage 111. An air inlet 1211 for communicating the exhaust passage 111 and the accommodation cavity 11 is also provided on the cold plate 120.

[0064] In the embodiment of the present application, when the battery pack is operating normally, the exhaust port 1111 remains closed to ensure the sealing of the accommodation cavity 11 of the battery pack. When the battery pack has a fault such as thermal runaway and generates a large amount of gas, the generated gas can enter the exhaust passage 111 through the air inlet 1211 of the cold plate 120. The air pressure in the exhaust passage 111 increases to open the exhaust port 1111, and then the gas in the exhaust passage 111 is discharged from the battery pack through the exhaust port 1111, avoiding explosion caused by too high air pressure in the accommodation cavity 11.

[0065] Furthermore, when the gas in the accommodation cavity 11 is discharged from the battery pack, it first needs to pass through the cold plate 120, and the gas is always in contact with the cold plate 120 for heat exchange during the flow in the exhaust passage 111. Thus, the temperature of the gas discharged from the battery pack in the accommodation cavity 11 can be effectively reduced. Even if the gas generated in the accommodation cavity 11 contains some combustible gases, it is difficult to meet the reaction temperature when the combustible gas contacts the air after the temperature is reduced and discharged from the battery pack, which helps to reduce the possibility of explosion caused by the reaction of the discharged gas with the air and improves the safety of the battery pack.

[0066] In some implementable ways, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 the cold plate 120 of the embodiment of the present application includes: a plate main body 121 and heat exchange fins 122. The plate main body 121 is connected to the beam main body 110 and seals the opening. The plate main body 121 is provided with a cooling flow channel 1212 suitable for the circulation of the coolant. The air inlet 1211 penetrates the plate main body 121. The heat exchange fins 122 are arranged on the side of the plate main body 121 facing the exhaust passage 111 and extend into the exhaust passage 111.

[0067] In some embodiments, a cooling channel 1212 is provided in the plate body 121. When thermal runaway occurs in the battery pack, coolant is introduced into the cooling channel 1212. The coolant circulates to absorb heat from the high-temperature gas. The coolant channel can be in different shapes such as strips and U-shapes, and can be adjusted according to the shape of the exhaust channel 111. The embodiments of the present application do not limit this.

[0068] The plate body 121 may be an upper plate and a lower plate sealed together to directly form a cooling channel 1212, or a cooling plate and a plug 1214 may be provided to form a cooling channel 1212 in the cooling plate, and the plug 1214 may close the cooling channel 1212. The specific structure of the plate body 121 is not limited in the embodiment of the present application, and may be reasonably selected according to actual needs.

[0069] In addition, heat exchange fins 122 are also provided on the plate body 121. After the gas enters the exhaust channel 111, it directly contacts the plate body 121 for heat exchange on the one hand, and contacts the heat exchange fins 122 on the other hand. The heat exchange fins 122 can increase the contact area between the high-temperature gas and the cold plate 120, thereby improving the heat dissipation efficiency of the cold plate 120, which is beneficial to quickly reduce the temperature of the gas in a short time and ensure the safety of gas discharge.

[0070] In some possible implementations, see Figure 1 , Figure 2 , Figure 5 and Figure 9 As shown, the side wall of the beam body 110 opposite to the opening of the embodiment of the present application is provided with a plurality of partition ribs 112, the partition ribs 112 are against the plate body 121, the plurality of partition ribs 112 are arranged at intervals along the height direction of the beam body 110, and divide the exhaust channel 111 into a plurality of sub-channels, each sub-channel being provided with at least one heat exchange fin 122.

[0071] In a specific implementation, the exhaust channel 111 is divided into a plurality of sub-channels, and the air inlet 1211 and the exhaust port 1111 can be configured to be connected to different sub-channels respectively. In this way, after the gas enters a sub-channel from the air inlet 1211, it needs to pass through at least two sub-channels before it can be discharged through the exhaust port 1111, which is beneficial to extend the gas discharge path, thereby extending the contact time of the gas with the plate body and the heat exchange fins 122, which is beneficial to further reduce the temperature of the gas, reduce the probability of explosion, and improve the safety of the battery pack.

[0072] In some possible implementations, see Figure 1 , Figure 2 , Figure 5 and Figure 9 As shown, a communication opening 1123 is provided on each partition rib 112 of the embodiment of the present application, and the communication opening 1123 is used to connect the sub-channels on both sides of the partition rib 112 .

[0073] In some embodiments, the communication ports 1123 on each partition rib 112 may be staggeredly arranged to extend the flow path of the gas in the exhaust passage 111, increase the heat dissipation duration. At the same time, the communication ports 1123 on the partition ribs 112 close to the exhaust port 1111 may be arranged to correspond to the exhaust port 1111 to ensure that when the gas reaches the exhaust port 1111, there is sufficient pressure to reopen the exhaust port 1111, so as to discharge the battery pack and prevent the gas from accumulating in the exhaust passage 111 and exploding.

[0074] In some implementable ways, referring to Figure 1 、 Figure 2 、 Figure 6 and Figure 9 as shown, the partition rib 112 of the embodiment of the present application includes a first extension section 1121 and a second extension section 1122. The first extension section 1121 is perpendicular to the height direction of the side beam 100, and the second extension section 1122 is parallel to the height direction of the side beam 100. The second extension section 1122 is located at one end of the first extension section 1121 facing the opening and abuts against the plate body 121.

[0075] In specific implementation, the second extension section 1122 is perpendicularly arranged with respect to the first extension section 1121, which can increase the contact area between the partition rib 112 and the plate body 121, ensure the sealing performance of the connection between the partition rib 112 and the plate body 121, so as to ensure that the gas entering the exhaust passage 111 can flow along a preset path, ensure the duration of contact between the gas and the cold plate 120, and is beneficial to ensuring that the temperature of the discharged gas is lower than the preset temperature. At the same time, it can improve the connection stability between the partition rib 112 and the plate body 121, improve the structural strength of the side beam 100, and ensure the anti-collision ability of the battery pack.

[0076] In some implementable ways, referring to Figure 1 、 Figure 2 、 Figure 5 and Figure 9 as shown, the embodiment of the present application further includes: a seal 130. There are multiple seals 130 corresponding to the partition ribs 112 one by one, and each seal 130 is arranged between the corresponding partition rib 112 and the plate body 121.

[0077] It can be understood that the seal 130 can further improve the sealing performance of the connection between the partition rib 112 and the plate body 121, ensure that the gas in the smoke exhaust passage can only enter another sub-channel from one sub-channel through the communication port 1123, prevent the gas from directly flowing between the partition rib 112 and the plate body 121, is beneficial to ensuring the effect of the sub-channel, extending the flow path of the gas, and further ensuring the cooling effect of the side beam 100 on the gas and improving the safety of the battery pack.

[0078] In some implementable ways, referring to Figure 1 、Figure 2 , Figure 6 , Figure 7 and Figure 9 As shown in Figure 7 and Figure 9 , an embodiment of the present application further includes a piston assembly 140, which is correspondingly connected to the exhaust port 1111. The piston assembly 140 is configured to close the exhaust port 1111 when the air pressure in the exhaust passage 111 is less than or equal to the air pressure outside the side beam 100, and open the exhaust port 1111 when the air pressure in the exhaust passage 111 is greater than the air pressure outside the side beam 100.

[0079] In some embodiments, the opening and closing of the exhaust port 1111 is controlled by the piston assembly 140. When the battery pack is operating normally, the air pressure in the accommodation cavity 11 and the exhaust passage 111 is less than or equal to the air pressure outside the side beam 100, and the piston 141 closes the exhaust port 1111, which can prevent external air from flowing back into the accommodation cavity 11 and causing potential safety hazards. At the same time, when a fault such as thermal runaway occurs in the battery pack, the temperature inside the battery pack rises, the air pressure in the accommodation cavity 11 increases, the gas in the accommodation cavity 11 enters the exhaust passage 111, and the air pressure in the exhaust passage 111 is greater than the external air pressure, thereby opening the exhaust port 1111 to discharge the gas. In this way, it can be ensured that the battery pack can start exhausting in time when the internal air pressure increases, preventing the battery pack from exploding due to excessive air pressure. At the same time, it can also prevent air from flowing back into the exhaust passage 111 during the exhaust process and coming into contact with the high-temperature gas to cause an explosion, which is beneficial to further improving the safety of the battery pack.

[0080] In some implementable ways, as shown in Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 9 The piston assembly 140 of the embodiment of the present application includes a piston 141, a guide post 142, a limiting member 143, and an elastic member 144. The piston 141 is movable along the opening direction of the exhaust port 1111. The guide post 142 is located in the exhaust passage 111, one end of the guide post 142 is connected to the piston 141, and the other end of the guide post 142 is connected to the limiting member 143. The elastic member 144 is sleeved on the guide post 142, the first end of the elastic member 144 is connected to the limiting member 143, and the second end of the elastic member 144 is connected to the inner wall of the exhaust passage 111. When the air pressure in the exhaust passage 111 is less than or equal to the air pressure outside the side beam 100, the piston 141 is in sealing cooperation with the exhaust port 1111 to close the exhaust port 1111. When the air pressure in the exhaust passage 111 is greater than the air pressure outside the side beam 100, the piston 141 moves away from the exhaust passage 111 along the axial direction of the guide post 142 to open the exhaust port 1111.

[0081] Thus, the guide post 142 plays a certain guiding role, which can ensure the linearity and stability of the movement of the piston 141, avoid jamming of the piston 141 during movement, and is beneficial to ensuring the exhaust efficiency of the battery pack.

[0082] In addition, when the battery pack is operating normally, the elastic member 144 is in a compressed state, so that the piston 141 is pressed against the exhaust port 1111 through the limiting member 143, which is beneficial to ensuring the sealing performance when the exhaust port 1111 is closed. At the same time, the seismic resistance of the piston assembly 140 is improved, preventing the piston 141 from falling off due to vibration or impact during vehicle driving, and also preventing the piston 141 from being damaged due to excessive movement during exhaust, which is beneficial to improving the reliability of the battery pack. A sealing ring 150 can also be provided between the piston 141 and the exhaust port 1111 to further improve the sealing performance. The sealing ring 150 can be made of sealing materials such as silica gel and rubber, and the embodiments of the present application do not limit this.

[0083] In some implementable ways, referring to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 9 as shown, the beam body 110 of the embodiment of the present application further includes a support plate 113; the exhaust port 1111 is opened on the support plate 113, the guide post 142 passes through the support plate 113, and the second end of the elastic member 144 is connected to the support plate 113.

[0084] It can be understood that the elastic member 144 is arranged between the support plate 113 and the limiting member 143. When the piston 141 moves relative to the exhaust port 1111, the distance between the support plate 113 and the limiting member 143 changes, thereby changing the compression amount of the elastic member 144. When the gas pressure in the exhaust passage 111 is greater than the elastic force of the elastic member 144, the piston 141 moves away from the exhaust passage 111 to open the exhaust port 1111. When the gas pressure in the exhaust passage 111 is less than or equal to the elastic force of the elastic member 144, the piston 141 is pressed against the exhaust port 1111 to close the exhaust port 1111.

[0085] At the same time, the support plate 113 can also disperse the stress from the piston 141, the guide post 142 and the elastic member 144, avoid the two main bodies directly bearing complex loads, reduce the risk of deformation, and is beneficial to improving the reliability of the side beam 100.

[0086] Referring to Figure 8 and Figure 9 as shown, the embodiment of the present application also provides a battery pack housing 10, including any one of the above side beams 100.

[0087] Among them, the structure and working principle of the side beam 100 have been described in detail in the above embodiments, and will not be repeated here.

[0088] In the embodiment of the present application, at least one side wall of the housing is provided with the above-mentioned side beam 100, which can not only ensure the structural strength of the housing and guarantee the sealing performance during the normal operation of the battery pack, but also safely discharge the gas when high-temperature and high-pressure gas is generated in the battery pack, effectively improving the reliability and safety of the battery pack.

[0089] See Figure 1 、 Figure 2 、 Figure 8 and Figure 9 As shown in

[0090] In the embodiment of the present application, a water nozzle 1213 can be provided on the cold plate 120, and the cold plate 120 is communicated with the cooling main board 30 through the water nozzle 1213. In this way, it is only necessary to connect the cooling main board 30 with the coolant supply device outside the battery pack, without the need to additionally set up connecting pipelines, which is beneficial to optimizing the pipeline distribution in the battery pack, saving the space occupied by the connecting pipelines, and improving the space utilization rate in the battery pack.

[0091] In addition, a control valve can be provided between the cold plate 120 and the cooling main board 30. When the battery pack is operating normally, the control valve is closed, and only the coolant needs to circulate in the cooling main board 30 to dissipate heat from the battery cell module 20. When the battery pack is in thermal runaway, the control valve is opened, and the coolant flows into the cold plate 120 to reduce the temperature of the gas. Of course, the specific control method is not limited in the embodiment of the present application and can be reasonably selected according to the actual situation.

[0092] The embodiment of the present application also provides a vehicle, including the above-mentioned battery pack.

[0093] In the embodiment of the present application, by installing the above-mentioned battery pack, the probability of explosion when the battery pack is in thermal runaway can be effectively reduced, thereby improving the safety and reliability of the vehicle and enhancing the anti-collision ability of the vehicle.

[0094] In summary, for the side beam 100, the battery pack housing 10, the battery pack, and the vehicle provided by the embodiments of the present application, the beam body 110 of the side beam 100 and the cold plate 120 jointly define an exhaust passage 111. An exhaust port 1111 is formed on the beam body 110, and the piston assembly 140 is connected to the exhaust port 1111. An air inlet 1211 is formed on the cold plate 120. The accommodation cavity 11 of the battery pack communicates with the exhaust passage 111 through the air inlet 1211. When the air pressure in the accommodation cavity 11 is greater than a preset value, the gas enters the exhaust passage 111 through the air inlet 1211, flushes open the piston assembly 140 after flowing through each sub-passage, and thus rushes out from the exhaust port 1111. During the process of gas discharge, the gas is in full contact with the cold plate 120, thereby reducing the temperature of the gas. Therefore, it is possible to prevent the combustible gas in the accommodation cavity 11 from coming into contact with air and exploding at a high temperature, which is beneficial to improving the safety and reliability of the battery pack, and further improving the anti-collision ability of the vehicle.

[0095] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or the communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0096] The device or element referred to in the embodiments of the present application or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically and precisely defined.

[0097] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims, and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0098] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0099] As used herein, the term "a plurality of" means two or more. As used herein, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0100] It should be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0101] It should be understood that in the embodiments of the present application, the magnitude of the sequence numbers of the above processes does not mean the sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0102] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0103] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A side beam (100) for enclosing a battery pack receiving cavity (11), characterized in that: include: A beam body (110), the beam body (110) defining an exhaust passage (111), a side of the beam body (110) facing the accommodating cavity (11) having an opening communicating with the exhaust passage (111), and the beam body (110) also having an exhaust port (1111) that can be opened and closed; A cold plate (120), the cold plate (120) blocks the opening and is connected to the beam body (110), at least a portion of the structure of the cold plate (120) extends into the exhaust channel (111), and the cold plate (120) is also provided with an air inlet (1211) for connecting the exhaust channel (111) and the accommodating cavity (11).

2. The side beam (100) according to claim 1, characterized in that: The cold plate (120) comprises: A plate body (121), the plate body (121) being connected to the beam body (110) and blocking the opening, the plate body (121) being provided with a cooling channel (1212) suitable for the circulation of coolant, and the air inlet (1211) penetrating the plate body (121); A heat exchange fin (122), the heat exchange fin (122) being arranged on a side of the plate body (121) facing the exhaust passage (111) and extending into the exhaust passage (111).

3. The side beam (100) according to claim 2, characterized in that: A side wall of the beam body (110) opposite to the opening is provided with a plurality of partition ribs (112), the partition ribs (112) abutting against the plate body (121), the plurality of partition ribs (112) being arranged at intervals along the height direction of the beam body (110) and dividing the exhaust channel (111) into a plurality of sub-channels, each of the sub-channels being provided with at least one heat exchange fin (122).

4. The side beam (100) according to claim 3, characterized in that: The partition rib (112) comprises a first extension section (1121) and a second extension section (1122), the first extension section (1121) being perpendicular to the height direction of the side beam (100), the second extension section (1122) being parallel to the height direction of the side beam (100), the second extension section (1122) being located at one end of the first extension section (1121) facing the opening and abutting against the plate body (121).

5. The side beam (100) according to claim 3, characterized in that: Also includes: A sealing member (130), wherein the sealing members (130) are multiple and correspond one to one with the partition ribs (112), and each of the sealing members (130) is arranged between the corresponding partition rib (112) and the plate body (121).

6. The side beam (100) according to claim 3, characterized in that: A communication opening (1123) is provided on each of the partition ribs (112), and the communication opening (1123) is used to connect the sub-channels on both sides of the partition rib (112).

7. The side beam (100) according to any one of claims 1 to 5, characterized in that: Also includes: A piston assembly (140), the piston assembly (140) being correspondingly connected to the exhaust port (1111); The piston assembly (140) is configured to close the exhaust port (1111) when the air pressure in the exhaust channel (111) is less than or equal to the air pressure outside the side beam (100), and to open the exhaust port (1111) when the air pressure in the exhaust channel (111) is greater than the air pressure outside the side beam (100).

8. The side beam (100) according to claim 7, characterized in that: The piston assembly (140) comprises a piston (141), a guide column (142), a limiter (143) and an elastic member (144); the piston (141) is movable along the opening direction of the exhaust port (1111); The guide column (142) is located in the exhaust passage (111), and one end of the guide column (142) is connected to the piston (141), and the other end of the guide column (142) is connected to the stopper (143); The elastic member (144) is sleeved on the guide column (142), and a first end of the elastic member (144) is connected to the limiting member (143), and a second end of the elastic member (144) is connected to an inner wall of the exhaust passage (111); When the air pressure in the exhaust passage (111) is less than or equal to the air pressure outside the side beam (100), the piston (141) seals and cooperates with the exhaust port (1111) to close the exhaust port (1111); When the air pressure in the exhaust passage (111) is greater than the air pressure outside the side beam (100), the piston (141) moves away from the exhaust passage (111) along the axial direction of the guide column (142) to open the exhaust port (1111).

9. The side beam (100) according to claim 8, characterized in that: The beam body (110) further includes a support plate (113); The exhaust port (1111) is opened on the support plate (113), the guide column (142) is penetrated by the support plate (113), and the second end of the elastic member (144) is connected to the support plate (113).

10. A battery pack housing (10), characterized in that: The invention comprises the edge beam (100) according to any one of claims 1 to 8.

11. A battery pack, characterized in that: include: The battery pack housing (10) according to claim 10, wherein the battery pack housing (10) defines a receiving cavity (11); A battery cell module (20), the battery cell module (20) being arranged in the accommodating cavity (11); A cooling mainboard (30), the cooling mainboard (30) being in heat exchange contact with the battery core module (20), and the cooling mainboard (30) being in communication with the cold plate (120).

12. A vehicle, characterized in that: A battery pack comprising the battery pack of claim 11.

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