Stiffened beam and battery pack

Abstract

The application relates to the battery technical field and provides a reinforcing beam and a battery pack. The reinforcing beam of the application is suitable for being arranged between two side walls of a battery pack shell and comprises a beam body, the beam body comprises a main body part and a protruding part arranged at the top of the main body part, the main body part and the protruding part form a bearing space, the bearing space can bear at least part of battery cells, the side of the protruding part is provided with an exhaust passage formed by being concave, the exhaust passage is communicated with the bearing space and is arranged penetratingly along the length direction of the beam body. The reinforcing beam of the application can provide support and protection for the battery cells, can also rapidly exhaust high-temperature flue gas generated when the battery cells are in thermal runaway through the exhaust passage, so that the temperature or pressure is prevented from accumulating in the battery pack, and the safety performance of the battery pack is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a reinforcing beam and a battery pack. Background Technology

[0002] In new energy vehicles, the battery pack is one of the core components, and its safety performance is crucial. However, when a single battery cell experiences thermal runaway, it generates a large amount of high-temperature gas. In traditional battery pack designs, when the explosion-proof valve on the side of the cell opens, the generated gas cannot be quickly and effectively expelled from the battery pack, thus hindering the improvement of battery pack safety performance. Utility Model Content

[0003] In view of this, this application aims to propose a reinforcing beam to improve the safety of the battery pack.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows: A reinforcing beam is suitable for being disposed between two side walls of a battery pack housing, the reinforcing beam comprising a beam body, the beam body comprising a main body portion and a protruding portion disposed on the top of the main body portion; The main body and the protruding part form a bearing space, which can bear at least part of the battery cell. The side of the protruding part has an inwardly recessed exhaust channel. The exhaust channel is connected to the bearing space and extends through the beam body along its length.

[0005] Furthermore, the main body has an extension section on each of its left and right sides that extends outward relative to the protruding part; the protruding part has a bearing space and an exhaust channel on both its left and right sides, and the bearing space on each side is formed by the protruding part and the extension section on the corresponding side.

[0006] Furthermore, the beam body has a left-right symmetrical structure, and the protruding part is located in the middle of the main body; the load-bearing space and the exhaust channel on both sides are also arranged symmetrically.

[0007] Furthermore, the height f of the exhaust channel satisfies: f≥20mm; and / or the width k of the protruding portion satisfies: 15mm≤k≤25mm.

[0008] Furthermore, a first cavity is formed within the main body portion, the first cavity extending along the length direction of the beam body; and / or, a second cavity is formed within the protruding portion, the second cavity extending along the length direction of the beam body.

[0009] Furthermore, the reinforcing beam is formed by roll forming of sheet metal.

[0010] Furthermore, the protruding portion has a supporting surface that abuts against the side of the battery cell, and the protruding portion has an abutting surface that abuts against the end face of the battery cell; the exhaust channel is correspondingly provided with the explosion-proof valve of the battery cell.

[0011] Furthermore, the width c of the main body satisfies: 100mm≤c≤160mm; and / or, the width b of the supporting surface satisfies: 15mm≤b≤35mm.

[0012] Furthermore, the contact surface includes a first part and a second part located on the upper and lower sides of the exhaust channel; the height h of the first part satisfies: h≥2R, and the height d of the second part satisfies: d≥2R, where R is the bending radius of the corner of the protruding part.

[0013] Compared with the prior art, this application has the following advantages: (1) The reinforcing beam of this application is suitable for being installed between the two side walls of the battery pack housing. By providing a protruding part on the top of the main body, the main body and the protruding part form a load-bearing space, and the load-bearing space can support at least part of the battery cells, which can make the battery cells more stable and provide support and protection for the battery cells, thereby improving the overall safety of the battery pack. The side of the protruding part has an inwardly recessed exhaust channel, which is connected to the load-bearing space and is installed through the beam body. It can quickly discharge the high-temperature fumes generated when the battery cells are thermally runaway into the battery pack through the exhaust channel, thereby preventing the accumulation of temperature or pressure in the battery pack, which is conducive to further improving the safety performance of the battery pack.

[0014] (2) The main body has protruding sections on both the left and right sides, which extend outward relative to the protruding part. Each side of the protruding part is provided with a load-bearing space and an exhaust channel, and the load-bearing space on each side is formed by the protruding part and the corresponding protruding section. In this way, the load-bearing space and exhaust channel are provided on the left and right sides of the main body, which can make the force more uniform and avoid stress concentration. At the same time, it can also facilitate the installation of the battery cells in the battery pack, thereby facilitating the optimization of the utilization rate of the internal space of the battery pack.

[0015] (3) The main body of the beam is a symmetrical structure, with the protruding part located in the middle of the main body. The load-bearing space and exhaust channel on both sides are also symmetrically arranged. This arrangement can reduce the number of processing steps, thereby helping to control production costs and thus improving the market competitiveness of the battery pack.

[0016] (4) The height f of the exhaust channel satisfies: f≥20mm, and the width k of the protruding part satisfies: 15mm≤k≤25mm. This setting ensures the cross-sectional area of ​​the exhaust channel, which is conducive to timely discharge of high-temperature flue gas generated by battery thermal runaway. Limiting the width of the protruding part to the range of 15mm-25mm ensures the structural strength of the exhaust channel and the structural strength of the beam body, without occupying too much internal space of the battery pack, thus facilitating the improvement of the utilization rate of the internal space of the battery pack.

[0017] (5) A first cavity is formed within the main body, extending along the length of the beam body. A second cavity is formed within the protruding portion, also extending along the length of the beam body. Thus, it can be understood that by setting the first and second cavities within the main body, the reinforcing beam can achieve structural lightweighting while maintaining sufficient structural strength. Simultaneously, it can reduce material usage while maintaining structural strength, thereby facilitating production cost control and ultimately enhancing the market competitiveness of the battery pack.

[0018] (6) The reinforcing beam is formed by roll forming of sheet metal. The advantage of this design is that it allows for control of material usage, reduces raw material waste, and lowers material costs. At the same time, it also facilitates automated production, thereby improving production efficiency and enabling the large-scale application of the reinforcing beam in this application.

[0019] (7) The protruding part has a support surface that abuts against the side of the battery cell and an abutment surface that abuts against the end face of the battery cell. The exhaust channel is correspondingly set with the explosion-proof valve of the battery cell. In this way, the support surface and abutment surface of the protruding part abut tightly against the side and end face of the battery cell, respectively. This multi-directional support method can more stably fix the battery cell, reduce the shaking and displacement of the battery cell in the battery pack, and help improve the safety of the battery. In addition, the fact that the exhaust channel is correspondingly set with the explosion-proof valve of the battery cell can quickly discharge the high-temperature fumes generated during thermal runaway of the battery cell into the battery pack through the exhaust channel, thereby preventing the accumulation of temperature or pressure in the battery pack, which in turn helps improve the safety performance of the battery pack.

[0020] (8) The width c of the main body satisfies: 100mm≤c≤160mm, and the width b of the support surface satisfies: 15mm≤b≤35mm. This setting, with the main body width c between 100mm and 160mm, ensures the strength and stability of the reinforcing beam structure while guaranteeing its impact resistance, and also provides stable support for the battery cell, preventing it from shaking. Simultaneously, it ensures a compact internal structure for the battery pack, which is beneficial for improving space utilization. Furthermore, with the support surface width b between 15mm and 35mm, it provides stable support for the battery cell while preventing the battery cell from being loosely fixed or experiencing uneven stress due to an excessively wide or narrow support surface, thus extending the battery cell's lifespan.

[0021] (9) The contact surface includes a first part and a second part located on the upper and lower sides of the exhaust channel. The height h of the first part satisfies: h≥2R, and the height d of the second part satisfies: d≥2R, where R is the protruding part. In this way, the stiffness and modal characteristics of the reinforcing beam and the battery pack as a whole can be improved, thereby avoiding battery pack vibration caused by insufficient stiffness and modal characteristics of the reinforcing beam or battery pack.

[0022] This application also proposes a battery pack having a reinforcing beam as described above.

[0023] The battery pack of this application, by setting the reinforcing beams as described above in the battery pack, can not only provide support and protection for the battery cells, but also quickly discharge the high-temperature fumes generated during thermal runaway of the battery cells through the exhaust channel, thereby preventing the accumulation of temperature or pressure in the battery pack, which is conducive to further improving the safety performance of the battery pack. Attached Figure Description

[0024] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the cooperation structure between the reinforcing beam and the battery pack housing according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the overall structure of the reinforcing beam described in an embodiment of the present utility model; Figure 3 This is a cross-sectional view of the reinforcing beam described in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the dimensions and position of the reinforcing beam described in an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1. Beam body; 11. Main body; 111. Extended section; 112. First cavity; 113. Support surface; 12. Protruding part; 121. Exhaust channel; 122. Second cavity; 123. Abutment surface; 1231. First part; 1232. Second part; 13. Splicing weld point; 2. Side wall; 3. Battery cell; a. Height of the extended section; b. Width of the supporting surface; c. Width of the main body; d. Height of the second part; e. Depth of the exhaust channel; f. Height of the exhaust channel; k. Width of the protruding part; h. Height of the first part; Z. Bearing space. Detailed Implementation

[0025] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0029] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0031] An embodiment of the first aspect of this application provides a reinforcing beam, which is applied in a battery pack and is mainly used to support the battery cells. Furthermore, the reinforcing beam of this embodiment, with its innovative structural design, can quickly discharge the high-temperature fumes generated during thermal runaway of the battery cells into the battery pack through the exhaust channel, thereby preventing the accumulation of temperature or pressure in the battery pack and thus improving the safety performance of the battery pack.

[0032] In new energy vehicles, the battery pack is one of the core components, and its safety performance is paramount. A battery pack typically consists of multiple individual battery cells that provide power to the vehicle during normal operation. However, if a single battery cell experiences thermal runaway, it may generate a large amount of high-temperature gas. To address this, battery packs are usually equipped with explosion-proof valves to safely release these gases, preventing excessive internal pressure and avoiding potential safety risks. However, in traditional battery pack designs, when the explosion-proof valves on the side of the cells open, the generated gas cannot be quickly and effectively released from the battery pack, thus hindering the improvement of battery pack safety performance.

[0033] In view of this, in order to overcome the shortcomings of the prior art, in this embodiment, a reinforcing beam suitable for being disposed between the two side walls 2 of the battery pack housing is combined with... Figures 1 to 4 In terms of overall design, it includes a beam body 1, which includes a main body 11 and a protruding part 12 located on the top of the main body 11.

[0034] The main body 11 and the protruding part 12 form a bearing space Z, which can bear at least part of the battery cell 3. The side of the protruding part 12 has an inwardly recessed exhaust channel 121, which is connected to the bearing space Z and is arranged through the beam body 1 along its length.

[0035] Therefore, by providing a protruding portion 12 at the top of the main body 11, and forming a bearing space Z with the main body 11, and the bearing space Z being able to support at least a portion of the battery cells 3, the fixing of the battery cells 3 can be made more stable, and the battery cells 3 can be supported and protected, thereby improving the overall safety of the battery pack. Furthermore, the protruding portion 12 has a recessed exhaust channel 121 on its side, which communicates with the bearing space Z and extends along the length of the beam body 1. This allows for the rapid discharge of high-temperature fumes generated during thermal runaway of the battery cells 3 into the battery pack, preventing the accumulation of temperature or pressure within the battery pack, and further enhancing the safety performance of the battery pack.

[0036] Based on the above overall introduction, specifically, as an exemplary structural form for this embodiment, it is composed of... Figures 1 to 4 shown.

[0037] The aforementioned sidewall 2, which supports the battery cell 3, is typically made of metal to ensure both lightweight design and structural strength of the battery pack. It is worth noting that its structure can be derived from existing sidewall structures. The battery cell 3 in this embodiment can be a well-known structure for battery cells, and will not be described further.

[0038] Continue to combine Figures 1 to 3 As shown, in some exemplary embodiments, the main body 11 has extension sections 111 on its left and right sides that extend outward relative to the protruding portion 12. Each side of the protruding portion 12 has a bearing space Z and an exhaust channel 121, and the bearing space Z on each side is formed by the protruding portion 12 and the corresponding extension section 111. Thus, by providing bearing spaces Z and exhaust channels 121 on the left and right sides of the main body 11, the force distribution is more uniform, avoiding stress concentration. Simultaneously, it facilitates the placement of the battery cells 3 within the battery pack, thereby optimizing the utilization of the internal space of the battery pack.

[0039] In practice, the height 'a' of the extended section satisfies: a ≥ 2R, where R is the bending radius of the corner of the protruding part 12, and R ≥ 3mm, thereby ensuring the structural strength of the extended section 111.

[0040] Combination Figures 3 to 4 As shown, in some exemplary embodiments, the beam body 1 has a bilaterally symmetrical structure, with the protruding portion 12 located in the middle of the main body 11, and the load-bearing spaces Z and exhaust channels 121 on both sides are also bilaterally symmetrically arranged. This arrangement reduces processing steps, thereby facilitating production cost control and enhancing the market competitiveness of the battery pack.

[0041] Continue to combine Figures 3 to 4 As shown, in some of the exemplary embodiments, the height f of the exhaust passage 121 satisfies: f≥20mm, and the width k of the protrusion satisfies: 15mm≤k≤25mm.

[0042] This design ensures the cross-sectional area of ​​the exhaust channel 121, facilitating the timely discharge of high-temperature fumes generated by battery thermal runaway. Limiting the width of the protruding portion 12 to the range of 15mm-25mm ensures both the structural strength of the exhaust channel 121 and the structural strength of the beam body 1, without excessively occupying internal battery pack space, thus improving the utilization rate of the battery pack's internal space.

[0043] In specific implementation, the concave depth e of the exhaust channel should satisfy e≥4R, where R is the bending radius of the corner of the protruding part 12, and R≥3mm, thereby further ensuring the cross-sectional area of ​​the exhaust channel 121 to ensure that the high-temperature smoke generated by the battery thermal runaway is discharged in a timely manner.

[0044] Combination Figures 2 to 4 As shown, in some exemplary embodiments, a first cavity 112 is formed in the main body 11, the first cavity 112 extending along the length direction of the beam body 1, and a second cavity 122 is formed in the protruding portion 12, the second cavity 122 extending along the length direction of the beam body 1.

[0045] Thus, it is understandable that by setting the first cavity 112 and the second cavity 122 inside the main body 11, the reinforcing beam can achieve structural lightweighting while maintaining sufficient structural strength. Simultaneously, it can reduce material usage while maintaining structural strength, thereby facilitating production cost control and ultimately enhancing the battery pack's market competitiveness.

[0046] In some exemplary embodiments, the reinforcing beam is roll-formed from sheet metal. This arrangement offers the advantage of controlling material usage, reducing raw material waste, and lowering material costs. It also facilitates automated production, thereby improving production efficiency and enabling the large-scale application of the reinforcing beam in this embodiment.

[0047] In practice, the reinforcing beam can be formed using a single sheet of sheet metal through roll forming. This further improves production efficiency while controlling material usage and reducing material costs. The top surface of the protruding portion 12 is provided with splicing weld points 13. It should be noted that the welding method for the reinforcing beam can refer to relevant welding methods well-known to those skilled in the art, and will not be elaborated further.

[0048] Combination Figures 1 to 3 As shown, in some exemplary embodiments, the protruding portion 12 has a support surface 113 that abuts against the side of the battery cell 3, and an abutting surface 123 that abuts against the end face of the battery cell 3. The exhaust channel 121 is correspondingly arranged with the explosion-proof valve of the battery cell 3. Thus, the support surface 113 and the abutting surface 123 of the protruding portion 12 are in close contact with the side and end face of the battery cell 3, respectively. This multi-directional support method can more stably fix the battery cell 3, reducing the shaking and displacement of the battery cell 3 within the battery pack, which is beneficial to improving battery safety. Furthermore, by aligning the exhaust channel 121 with the explosion-proof valve of the battery cell 3, the high-temperature fumes generated during thermal runaway of the battery cell 3 can be quickly discharged from the battery pack through the exhaust channel 121, thereby preventing the accumulation of temperature or pressure within the battery pack, which in turn is beneficial to improving the safety performance of the battery pack.

[0049] Combination Figures 1 to 4 As shown, in some of the exemplary embodiments, the width c of the main body satisfies: 100mm≤c≤160mm, and the width b of the support surface satisfies: 15mm≤b≤35mm.

[0050] This configuration, with the main body width c between 100mm and 160mm, ensures the strength and stability of the reinforcing beam structure while guaranteeing its impact resistance. It also provides stable support for the battery cell 3, preventing it from swaying. Simultaneously, it ensures a compact internal structure for the battery pack, improving space utilization. Furthermore, the support surface width b, between 15mm and 35mm, provides stable support for the battery cell 3 while preventing it from being loosely fixed or experiencing uneven stress due to an excessively wide or narrow support surface 113, thus extending the battery cell 3's lifespan.

[0051] Combination Figures 3 to 4 As shown, in some exemplary embodiments, the contact surface 123 includes a first portion 1231 and a second portion 1232 located on the upper and lower sides of the exhaust channel 121. The height h of the first portion satisfies: h ≥ 2R, and the height d of the second portion satisfies: d ≥ 2R, where R is the bending radius of the corner of the protruding portion 12. This improves the stiffness and modal characteristics of the reinforcing beam and the battery pack as a whole, thereby preventing battery pack vibration due to insufficient stiffness and modal characteristics of the reinforcing beam or battery pack.

[0052] In specific implementation, the bending radius R of the protruding part 12 corners should be ≥3mm. With this setting, the bending within this range can transition and regulate the stress at the corners and welds of the edge beams, reducing the risk of failure and cracking of the reinforced beams at the corners and welds.

[0053] It is worth noting that, regarding the reinforcing beam suitable for being disposed between the two side walls 2 of the battery pack housing in this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 4 As shown, it may include, for example, a beam body 1, which includes a main body 11 and a protruding portion 12 disposed on the top of the main body 11.

[0054] The main body 11 and the protruding part 12 form a load-bearing space Z, which can support at least a portion of the battery cells 3. The side of the protruding part 12 has an inwardly recessed exhaust channel 121, which communicates with the load-bearing space Z and extends through the beam body 1 along its length. The left and right sides of the main body 11 each have an extension section 111 that extends outward relative to the protruding part 12. Both sides of the protruding part 12 are provided with a load-bearing space Z and an exhaust channel 121, and each side of the load-bearing space Z is formed by the protruding part 12 and the corresponding side extension section 111.

[0055] The beam body 1 has a symmetrical structure, with a protruding portion 12 located in the middle of the main body 11. The load-bearing spaces Z and exhaust channels 121 on both sides are also symmetrically arranged. The height f of the exhaust channel is 20 mm, and the width k of the protruding portion is 25 mm. A first cavity 112 is formed within the main body 11, extending along the length of the beam body 1. A second cavity 122 is formed within the protruding portion 12, also extending along the length of the beam body 1. The reinforcing beam is formed by roll forming of sheet metal.

[0056] The protruding portion 12 has a supporting surface 113 that abuts against the side of the battery cell 3, and an abutting surface 123 that abuts against the end face of the battery cell 3. The exhaust channel 121 is correspondingly provided with the explosion-proof valve of the battery cell 3. The width c of the main body is 160mm, and the width b of the supporting surface is 35mm. The abutting surface 123 includes a first part 1231 and a second part 1232 located on the upper and lower sides of the exhaust channel 121. The height h of the first part is 6mm, and the height d of the second part is 6mm. R is the bending radius of the corner of the protruding portion 12, and R is 3mm.

[0057] In the preferred embodiment of the above-mentioned reinforcing beam, the specific configuration and arrangement of the main body 11, the protruding part 12, and the exhaust channel 121, etc., can still be referred to the description in the above-mentioned exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the main body 11, the protruding part 12, and the exhaust channel 121, etc., can also be referred to the description in the above-mentioned exemplary embodiments.

[0058] The reinforcing beam in this embodiment adopts the above design. By providing a protruding portion 12 at the top of the main body 11, the main body 11 and the protruding portion 12 form a load-bearing space Z. The load-bearing space Z can support at least a portion of the battery cells 3, making the fixing of the battery cells 3 more stable and providing support and protection for the battery cells 3, thereby improving the overall safety of the battery pack. The protruding portion 12 has a recessed exhaust channel 121 on its side. The exhaust channel 121 communicates with the load-bearing space Z and extends along the length of the beam body 1. It can quickly expel the high-temperature fumes generated during thermal runaway of the battery cells 3 through the exhaust channel 121, thereby preventing the accumulation of temperature or pressure inside the battery pack, and further improving the safety performance of the battery pack.

[0059] An embodiment of the second aspect of this application provides a battery pack having a reinforcing beam as described above.

[0060] The battery pack of this embodiment, by providing the reinforcing beams as described above, can not only provide support and protection for the battery cell 3, but also quickly discharge the high-temperature fumes generated when the battery cell 3 experiences thermal runaway through the exhaust channel 121 into the battery pack, thereby preventing the accumulation of temperature or pressure inside the battery pack, which is conducive to further improving the safety performance of the battery pack.

[0061] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A reinforcing beam, suitable for being disposed between the two side walls of a battery pack housing, characterized in that: The reinforcing beam includes a beam body, which includes a main body and a protruding portion located on the top of the main body. The main body and the protruding part form a bearing space, which can bear at least a portion of the battery cell. The side of the protruding part has an inwardly recessed exhaust channel. The exhaust channel is connected to the bearing space and extends through the beam body along its length.

2. The reinforcing beam according to claim 1, characterized in that: The main body has protruding sections on its left and right sides that extend outward relative to the protruding portion. The protruding portion is provided with a bearing space and an exhaust channel on both the left and right sides, and the bearing space on each side is formed by the protruding portion and the corresponding extended section.

3. The reinforcing beam according to claim 2, characterized in that: The beam body has a left-right symmetrical structure, and the protruding part is located in the middle of the main body. The load-bearing spaces and exhaust channels on both sides are arranged symmetrically.

4. The reinforcing beam according to claim 3, characterized in that: The height f of the exhaust channel satisfies: f ≥ 20 mm; and / or, The width k of the protruding portion satisfies: 15mm≤k≤25mm.

5. The reinforcing beam according to any one of claims 2 to 4, characterized in that: A first cavity is formed within the main body, and the first cavity extends along the length direction of the beam body; and / or A second cavity is formed within the protruding portion, and the second cavity extends along the length direction of the beam body.

6. The reinforcing beam according to claim 5, characterized in that: The reinforcing beam is formed by roll forming of sheet metal.

7. The reinforcing beam according to claim 6, characterized in that: The extended section has a supporting surface that abuts against the side of the battery cell, and the protruding portion has an abutting surface that abuts against the end face of the battery cell. The exhaust channel is configured to correspond to the explosion-proof valve of the battery cell.

8. The reinforcing beam according to claim 7, characterized in that: The width c of the main body portion satisfies: 100mm ≤ c ≤ 160mm; and / or, The width b of the support surface satisfies: 15mm ≤ b ≤ 35mm.

9. The reinforcing beam according to claim 7, characterized in that: The contact surface includes a first part and a second part located on the upper and lower sides of the exhaust channel; The height h of the first part satisfies: h≥2R, and the height d of the second part satisfies: d≥2R, where R is the bending radius of the corner of the protruding part.

10. A battery pack, characterized in that: The battery pack housing is provided with a reinforcing beam as described in any one of claims 1 to 9.

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