Structural beam, box body, battery and electric equipment
By setting venting sections and channels on both sides of the battery structure beam, the issues of safety and space utilization during battery thermal runaway are solved, achieving efficient heat dissipation and battery safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2022-09-26
- Publication Date
- 2026-05-12
AI Technical Summary
In the event of thermal runaway, existing batteries cannot effectively expel high-temperature gases, leading to a chain reaction between battery cells, which affects safety and space utilization.
Design a structural beam with exhaust vents and heat insulation components on both side walls to form an exhaust channel. The battery cells discharge high-temperature gas through the exhaust vents, and the heat insulation components prevent mutual interference.
It improves battery safety and space utilization, prevents chain reactions, and enhances battery heat dissipation and energy density.
Smart Images
Figure CN224232851U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a structural beam, a box, a battery, and an electrical device. Background Technology
[0002] In recent years, new energy vehicles have made leaps and bounds in development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role.
[0003] Batteries in the current technology typically consist of multiple battery cells arranged in a tightly fitted manner. However, battery cells may experience thermal runaway during use. Once a battery cell experiences thermal runaway and emits waste products, it may affect surrounding battery cells and even trigger a chain reaction, posing a significant safety hazard. Utility Model Content
[0004] In view of this, this application provides a structural beam, a box, a battery, and an electrical device to solve the problem of poor battery safety in the prior art.
[0005] In a first aspect, this application provides a structural beam, the structural beam comprising: a first sidewall and a second sidewall, an exhaust channel being formed between the first sidewall and the second sidewall, the first sidewall having a first exhaust portion for receiving emissions from at least one of the battery cells, and the second sidewall having a second exhaust portion for receiving emissions from at least one other of the battery cells.
[0006] In the above scheme, an exhaust channel is provided inside the structural beam. The battery cells on both sides of the structural beam can exhaust gas into the exhaust channel through the holes on the first or second side wall to avoid the high-temperature gas affecting the other battery cells, thereby improving the arrangement of the cells in the battery compartment, saving internal battery space, and improving the battery's volume utilization, energy density and safety.
[0007] In one possible design, the first sidewall and the second sidewall are disposed opposite each other along a first direction.
[0008] In the above scheme, the battery cells are distributed on both sides of the structural beam, which facilitates the grouping of battery cells; this arrangement can also improve the heat dissipation of the battery while ensuring the exhaust effect.
[0009] In one possible design, the first exhaust section and the second exhaust section are staggered along the first direction.
[0010] In the above scheme, the staggered arrangement of the first exhaust section and the second exhaust section can prevent the emissions ejected from the first exhaust section and the second exhaust section from affecting each other.
[0011] In one possible design, along the first direction, the first exhaust portion and the second exhaust portion are arranged opposite to each other, and the structural beam further includes a heat insulation member disposed between the first exhaust portion and the second exhaust portion.
[0012] In the above scheme, the heat insulation component separates the exhaust channels, thereby preventing the battery cells in the first and second sidewall directions from affecting each other during thermal runaway.
[0013] In one possible design, along the first direction, the projection of the first exhaust portion and the projection of the second exhaust portion at least partially overlap to form an overlapping area, and the projection of the heat insulation member at least covers the overlapping area.
[0014] In the above scheme, the projections of the first exhaust section and the second exhaust section overlap to form an overlapping area, and the projection of the heat insulation component covers at least the overlapping area. In this way, the heat insulation component can prevent the battery cells in the direction of the first sidewall and the second sidewall from affecting each other during thermal runaway.
[0015] In one possible design, the structural beam extends along a second direction, the first sidewall has a plurality of first exhaust vents, and the second sidewall has a plurality of second exhaust vents.
[0016] The thermal insulation element extends along the second direction and is located between the first sidewall and the second sidewall.
[0017] In the above scheme, the thermal insulation component extends in the same direction as the structural beam, which not only facilitates blocking the emissions ejected from the first and second exhaust sections, but also facilitates the installation process of the thermal insulation component.
[0018] In one possible design, the heat insulation element divides the exhaust passage into a first passage and a second passage, the first passage being connected to the first exhaust section and the second passage being connected to the second exhaust section.
[0019] In the above scheme, the exhaust from the first exhaust section enters the first channel, and the exhaust from the second exhaust section enters the second channel to avoid mutual interference.
[0020] In one possible design, the thermal insulation element is configured to be movably disposed within the exhaust channel along the first direction to change the size of the first channel or the second channel.
[0021] In the above scheme, the heat insulation component can change the size of the first channel and the second channel. When a battery cell on one side experiences thermal runaway, the size of the first channel or the second channel can be increased accordingly, thereby improving the exhaust efficiency and enhancing the safety of the battery.
[0022] In one possible design, the structural beam further includes a support member for securing the thermal insulation element.
[0023] In the above scheme, the support component can ensure the position and orientation of the heat insulation component under normal conditions.
[0024] In one possible design, at least a portion of the support is configured to react with the emissions from the battery cell, thereby enabling the thermal insulation to be movable along the first direction.
[0025] In the above scheme, the battery cell can melt when it thermally runs away and spews gas into the exhaust channel. In this way, the heat insulation component can move under the impetus of the gas ejected from the runaway battery cell, thereby expanding the exhaust space on one side of the runaway battery cell.
[0026] In one possible design, at least a portion of the support is configured to be melted when the emissions from the battery cell are discharged into the exhaust channel.
[0027] In the above scheme, the support can melt when the battery cell ejects emissions, so that the heat insulation can move under the impetus of the gas ejected from the runaway battery cell, thereby expanding the exhaust space on one side of the runaway battery cell.
[0028] In one possible design, the structural beam is further provided with a reinforcing member, which is disposed within the exhaust channel and located between the first side wall and the second side wall. The reinforcing member divides the exhaust channel into a first sub-channel and a second sub-channel, and the reinforcing member is provided with a connecting hole that connects the first sub-channel and the second sub-channel.
[0029] In the above scheme, the reinforcing member improves the structural strength of the structural beam, and the connecting holes on the reinforcing member can ensure that the gas ejected from the battery cell is ejected from the first sub-channel and the second sub-channel, thereby improving the exhaust efficiency.
[0030] In one possible design, along the first direction, both the first exhaust portion and the second exhaust portion are misaligned with the connecting hole.
[0031] In the above scheme, the gas ejected from the connecting hole can be prevented from directly hitting the first exhaust section or the second exhaust section, thereby preventing the battery cells from being directly sprayed by high-temperature gas.
[0032] In one possible design, there are multiple first exhaust sections, multiple second exhaust sections, and multiple connecting holes, including a first connecting hole.
[0033] Along the first direction, one of any two adjacent first exhaust sections and second exhaust sections coincides with the projection of the first connecting hole, while the other is misaligned with the projection of the first connecting hole.
[0034] In the above solution, multiple first exhaust sections, second exhaust sections, and connecting holes are provided to improve exhaust efficiency. Furthermore, it prevents gas ejected from the connecting holes from directly impacting the first or second exhaust sections, thereby preventing the battery cells from being directly sprayed with high-temperature gas.
[0035] In one possible design, the reinforcing member includes a first connecting end and a second connecting end disposed opposite to each other, the first connecting end and the second connecting end being connected to two opposite side walls of the structural beam, respectively.
[0036] In the above scheme, the first connecting end and the second connecting end are supported on opposite sides of the structural beam, which further improves the structural strength of the structural beam.
[0037] In one possible design, the first connection end includes a forked first sub-connection portion and a second sub-connection portion, the first sub-connection portion being connected to the first sidewall, and the second sub-connection portion being connected to the second sidewall.
[0038] In the above scheme, the first connecting end is bifurcated and the two supporting ends are respectively supported by the first side wall and the second side wall, which further improves the structural strength of the structural beam.
[0039] In one possible design, the second connection end includes a forked third sub-connection portion and a fourth sub-connection portion, the third sub-connection portion being connected to the first sidewall and the fourth sub-connection portion being connected to the second sidewall.
[0040] In the above scheme, the second connecting end is bifurcated and the two supporting ends are respectively supported by the first side wall and the second side wall, which further improves the structural strength of the structural beam.
[0041] In one possible design, the structural beam further includes protective components, which include a first protective component and a second protective component. The first protective component is located between the first exhaust portion and the connecting hole, and the second protective component is located between the second exhaust portion and the connecting hole.
[0042] In the above scheme, the first protective component can prevent high-temperature gas from entering the second sub-channel from the first sub-channel along the connecting hole, and the second protective component can prevent high-temperature gas from entering the first sub-channel from the second sub-channel along the connecting hole, thereby avoiding mutual interference between the two battery cells.
[0043] In one possible design, the first protective component and the second protective component are respectively provided with ventilation holes.
[0044] In the above scheme, the vents can enhance the exhaust capacity.
[0045] In one possible design, the vent includes a first vent and a second vent. The first vent is disposed on the first protective member, and the projection of the first vent in the first direction is offset from the first exhaust portion. The second vent is disposed on the second protective member, and the projection of the second vent in the first direction is offset from the second exhaust portion.
[0046] In the above scheme, the first protective component can block the high-temperature gas from being directly injected into the first exhaust section, and the second protective component can block the high-temperature gas from being directly injected into the second exhaust section, thereby avoiding a chain reaction caused by the high-temperature gas generated by the runaway battery cell.
[0047] In one possible design, along the first direction, the vent hole and the connecting hole at least partially project to coincide.
[0048] In the above scheme, the overlap between the vent hole and the connecting hole can improve exhaust efficiency.
[0049] Secondly, this application provides a box body comprising the structural beams described in any of the above claims, which obviously has the advantages of the aforementioned structural beams.
[0050] Thirdly, this application provides a battery comprising a plurality of battery cells and the structural beam described in any of the above claims, or the battery comprising a plurality of battery cells and the aforementioned housing, the housing being used to accommodate the plurality of battery cells.
[0051] In the above scheme, the battery cells can promptly release high-temperature gas when they fail, without affecting the surrounding battery cells, thus ensuring good safety.
[0052] In conjunction with the third aspect, in one possible design, at least one of the battery cells is connected to the first sidewall of the structural beam, and at least another battery cell is connected to the second sidewall of the structural beam.
[0053] In the above scheme, the battery cells are placed on both sides of the structural beam, which improves the safety of the battery.
[0054] Fourthly, this application provides an electrical device, which includes the aforementioned battery, and the battery is used to provide power to the electrical device and has good safety.
[0055] Other features and advantages of the embodiments of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the embodiments of this application. The objects and other advantages of the embodiments of this application are realized and obtained in accordance with the structures particularly pointed out in the description and the drawings. Attached Figure Description
[0056] Figure 1A schematic diagram of the electrical equipment provided in the embodiments of this application;
[0057] Figure 2 A schematic diagram of a battery provided in an embodiment of this application;
[0058] Figure 3 A schematic diagram of a single battery cell provided in an embodiment of this application;
[0059] Figure 4 This is a structural diagram of a structural beam provided in an embodiment of this application;
[0060] Figure 5 for Figure 4 A structural schematic diagram of the central structural beam from another perspective;
[0061] Figure 6 This is a structural diagram of a structural beam provided in another embodiment of this application;
[0062] Figure 7 for Figure 6 A structural schematic diagram of the central structural beam from another perspective.
[0063] Figure label:
[0064] 10. Housing; 100. Structural beam; 200. Battery; 210. Battery cell; 211. Cover; 212. Electrode assembly; 213. Housing; 300. Electrical equipment; 11. First sidewall; 111. First exhaust section; 12. Second sidewall; 121. Second exhaust section; 13. Exhaust channel; 131. First channel; 132. Second channel; 14. Support member; 2. Heat insulation member; 3. Reinforcing member; 31. First sub-channel; 32. Second sub-channel; 33. Connecting hole; 34. First connecting end; 341. First sub-connecting part; 342. Second sub-connecting part; 35. Second connecting end; 351. Third sub-connecting part; 352. Fourth sub-connecting part; 4. First protective member; 41. First vent; 42. First heat insulation retaining member; 5. Second protective member; 52. Second vent; 53. Second heat insulation retaining member.
[0065] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation
[0066] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0067] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0068] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0069] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0070] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0071] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0072] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0073] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the embodiments of this application and for 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 the embodiments of this application. Furthermore, in this context, it should be understood that when referring to an element being connected "up" or "down" to another element, it can be directly connected not only to the other element but also indirectly connected to the other element through an intermediate element.
[0074] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0075] To ensure clarity and conciseness in the description of the following embodiments, a brief introduction to the relevant concepts or technologies is given first:
[0076] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or battery pack. A battery generally includes a casing for encapsulating one or more battery cells. The casing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. The battery may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the embodiments of this application are not limited thereto.
[0077] Specifically, the battery may include a casing and individual battery cells, with the individual battery cells housed within the casing. The casing provides space for the individual battery cells and can have various structures. In some embodiments, the casing may include a first part and a second part, which overlap each other, together defining a space for accommodating the individual battery cells. The second part may be a hollow structure open at one end, while the first part may be a plate-like structure, covering the open side of the second part so that the first and second parts together define the space. Alternatively, both the first and second parts may be hollow structures open on one side, with the open side of the first part covering the open side of the second part. Of course, the casing formed by the first and second parts can have various shapes, such as a cylinder or a cuboid. Multiple individual battery cells may be connected in series, parallel, or a combination thereof. A combination thereof refers to multiple individual battery cells being connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or in a hybrid configuration, and then housed within a casing. Alternatively, multiple battery cells can be first connected in series, parallel, or in a hybrid configuration to form a battery module, and then these modules can be connected in series, parallel, or in a hybrid configuration to form a whole, which is then housed within a casing. The battery may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells. Each battery cell can be a secondary or primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Battery cells can be cylindrical, flat, cuboid, or other shapes.
[0078] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated one, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited to these.
[0079] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.
[0080] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. A battery consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, the battery faces high requirements in terms of both safety and cycle life.
[0081] The applicant discovered that when a battery cell experiences thermal runaway, it generates a large amount of heat and emits high-temperature emissions (usually in gaseous form), which causes the internal temperature of the battery to rise. The stacked structure of multiple battery cells exacerbates this phenomenon, which in turn seriously affects the performance and lifespan of the remaining battery cells and may even cause the battery to explode during use, which is detrimental to consumer safety.
[0082] Therefore, in existing technologies, to prevent battery cell explosions caused by poor venting after thermal runaway, a venting channel of a certain size is often provided on the side of the battery cell (e.g., opposite the explosion-proof valve) to accelerate the discharge of emissions and thus prevent thermal diffusion caused by thermal runaway. However, in existing designs, the battery cell is spaced a certain distance from the structural beam as the venting channel. This structural arrangement wastes a lot of space, affects the battery cell arrangement space within the battery compartment, and reduces volume utilization.
[0083] Based on the above considerations, in order to improve the arrangement of battery cells within the battery compartment, save internal battery space, and enhance the battery's volume utilization, energy density, and safety, the applicant, after in-depth research, designed a structural beam. The structural beam includes a first sidewall and a second sidewall, with an exhaust channel formed between the first and second sidewalls. The first sidewall has a first exhaust section for receiving emissions from at least one battery cell, and the second sidewall has a second exhaust section for receiving emissions from at least one other battery cell. This solution, by setting an exhaust channel inside the structural beam, allows battery cells on both sides of the structural beam to exhaust gas into the exhaust channel through holes in the first or second sidewall, thereby improving the arrangement of battery cells within the battery compartment, saving internal battery space, and enhancing the battery's volume utilization, energy density, and safety.
[0084] The electrical equipment mentioned in this application may include, but is not limited to: laptops, pen-based computers, mobile computers, e-book players, portable telephones, portable fax machines, portable copiers, portable printers, stereo headphones, video recorders, LCD TVs, watches, fitness trackers, portable cleaners, portable CD players, transceivers, electronic notebooks, calculators, portable recorders, radios, backup power supplies, motors, automobiles, motorcycles, electric bicycles, lighting fixtures, toys, game consoles, power tools, flashlights, and lithium-ion capacitors, etc. When the electrical equipment is a vehicle, the vehicle may be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles may be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.
[0085] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device 300 according to an embodiment of this application.
[0086] Please see Figure 1This is a schematic diagram of an electrical device provided in an embodiment of this application. The electrical device in the diagram is a vehicle, which can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 200 is installed inside the vehicle, and the battery 200 can be located at the bottom, front, or rear of the vehicle. The battery 200 can be used to power the vehicle; for example, the battery 200 can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery 200 to supply power to the motor, for example, to meet the power needs of the vehicle during starting, navigation, and driving.
[0087] Please see Figure 2 This is a schematic diagram of a battery provided in an embodiment of this application. In the battery 200, multiple battery cells 210 can be connected in series, parallel, or a combination thereof. A combination thereof means that some of the multiple battery cells 210 are connected in series and others in parallel. Please refer to [link to relevant documentation]. Figure 3 This is a schematic diagram of a battery cell provided in an embodiment of this application. The battery cell 210 includes a cover 211, an electrode assembly 212, and a housing 213. Multiple battery cells 210 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of multiple battery cells 210 is housed within the housing 10. Alternatively, the battery 200 can also be formed by first connecting multiple battery cells 210 in series, parallel, or in a mixed manner to form a battery module, and then connecting multiple battery modules in series, parallel, or in a mixed manner to form an entire assembly, which is also housed within the housing 10. The battery 200 may also include other structures; for example, the battery 200 may also include a busbar component for realizing the electrical connection between multiple battery cells 210.
[0088] Please see Figure 4 and Figure 5 This application provides a structural beam 100, which includes a first sidewall 11 and a second sidewall 12. An exhaust channel 13 is formed between the first sidewall 11 and the second sidewall 12. The first sidewall 11 has a first exhaust portion 111 for receiving emissions from at least one battery cell 210. The second sidewall 12 has a second exhaust portion 121 for receiving emissions from at least one other battery cell 210.
[0089] The structural beam 100 can be a strip structure, and its cross-sectional shape perpendicular to its length direction can be circular, elliptical, semi-circular, trapezoidal, square, or a combination thereof. In some embodiments, the cross-sectional shape of the structural beam 100 perpendicular to its length direction is rectangular, which can balance good structural strength and low processing cost. The structural beam 100 includes a first sidewall 11 and a second sidewall 12 for contacting the battery cell. The structural beam 100 may also include a third sidewall, a fourth sidewall, a fifth sidewall, etc. The number of sidewalls of the structural beam 100 depends on the number of sides of the cross-sectional shape perpendicular to its length direction. The sidewalls of the structural beam 100 are interconnected to form a closed shape. The first sidewall 11 and the second sidewall 12 can be arranged adjacent to each other, opposite each other, or at a certain angle to each other. An exhaust channel 13 is formed between the first sidewall 11 and the second sidewall 12. The exhaust channel 13 can communicate with the outside, so that the gas entering the exhaust channel 13 can be smoothly discharged to the outside. Specifically, openings communicating with the outside can be provided on some sidewalls of the structural beam 100, or openings communicating with the outside can be provided at the ends of the structural beam 100 in the length direction.
[0090] The first sidewall 11 has a first vent 111, which can be a perforated structure. The first vent 111 can correspond to the explosion-proof valve of the battery cell 210, and its size and shape can be adapted to the explosion-proof valve, so that the explosion-proof valve can open smoothly when the battery cell experiences thermal runaway. It should be noted that the number of first vents 111 can be one or more, and their specific number matches the number of explosion-proof valves on the battery cells abutting the first sidewall 11. When any battery cell abutting the first sidewall 11 experiences thermal runaway, the explosion-proof valve of that battery cell opens to allow the gas inside the battery cell to be injected into the vent space.
[0091] The second sidewall 12 has a second vent 121, which can be a perforated structure. The second vent 121 corresponds to the explosion-proof valve of the battery cell and can be adapted to the size and shape of the explosion-proof valve, so that the explosion-proof valve can open smoothly in the event of thermal runaway of the battery cell. It should be noted that the number of second vents 121 can be one or more, and their specific number matches the number of explosion-proof valves on the battery cells abutting against the second sidewall 12. When any battery cell abutting against the second sidewall 12 experiences thermal runaway, the explosion-proof valve of that battery cell opens, allowing gas inside the battery cell to be injected into the vent space.
[0092] In this embodiment, the structural beam 100 can utilize its internal cavity for venting, saving space. Furthermore, when the battery cell 210 is attached to the beam, the structural strength is also improved. When the battery cell 210 becomes uncontrollable, the explosion-proof valve opens, and the ejected high-temperature gas enters the beam cavity along the first vent 111 or the second vent 121. The high-temperature gas ejected from the battery cell 210, along with any internal material particles from the battery cell 210, can enter the venting channel 13, preventing a chain reaction caused by the uncontrollable battery cell 210 coming into contact with the high-temperature gas.
[0093] In summary, the structural beam 100 is equipped with an exhaust channel 13. The battery cells 210 on both sides of the structural beam 100 can exhaust into the exhaust channel 13 through the holes on the first side wall 11 or the second side wall 12, thereby improving the arrangement of the battery cells in the battery 200 compartment, saving internal space of the battery 200, and improving the volume utilization rate and energy density of the battery 200.
[0094] In one embodiment, the first sidewall 11 and the second sidewall 12 are disposed opposite each other along a first direction.
[0095] Please see Figure 5 The first sidewall 11 and the second sidewall 12 can be parallel to each other. It should be noted that "parallel" here refers to approximate parallelism; that is, a small angular deviation is allowed between them, not strict parallelism. In this way, the battery cells 210 are distributed on both sides of the structural beam 100, facilitating grouping of the battery cells 210. Furthermore, this arrangement allows the battery cells 210 on both sides of the structural beam 100 to be at the furthest distance from each other while maintaining contact with the structural beam 100, thereby improving the heat dissipation effect of the battery while ensuring effective ventilation.
[0096] In this embodiment, the battery cells 210 are distributed on both sides of the structural beam 100, which facilitates the grouping of the battery cells 210; this arrangement can also improve the heat dissipation effect of the battery 200 while ensuring the exhaust effect.
[0097] In one embodiment, the first exhaust portion 111 and the second exhaust portion 121 are staggered along a first direction.
[0098] The staggered arrangement means that the first exhaust section 111 and the second exhaust section 121 do not overlap in the first direction. The staggered arrangement of the first exhaust section 111 and the second exhaust section 121 can prevent the emissions ejected from the first exhaust section 111 and the second exhaust section 121 from affecting each other.
[0099] In one embodiment, along a first direction, the first exhaust portion 111 and the second exhaust portion 121 are disposed opposite to each other, and the structural beam 100 further includes a heat insulation member 2 disposed between the first exhaust portion 111 and the second exhaust portion 121.
[0100] Within the same battery, the specifications of the battery cells 210 are usually the same, and the positions of the explosion-proof valves on the battery cells 210 are usually the same. Setting the first vent 111 and the second vent 121 opposite each other can ensure the corresponding arrangement of the battery cells 210 on both sides, thereby optimizing the overall layout of the battery and improving assembly efficiency. In addition, setting the first vent 111 and the second vent 121 opposite each other on the structural beam 100 can also reduce the processing difficulty and thus reduce processing costs.
[0101] The heat insulation component 2 can be a flat plate structure, and there can be one or more of them. The heat insulation component 2 can be made of high-temperature resistant and heat-insulating materials, such as asbestos, calcium silicate fiber, magnesium cementitious materials, etc. The heat insulation component 2 can separate the exhaust channel 13, thereby preventing the battery cells 210 in the direction of the first sidewall 11 and the second sidewall 12 from affecting each other during thermal runaway. In one embodiment, the heat insulation component 2 is heat insulation cotton. Heat insulation cotton is low in cost and light in weight, which is beneficial to reducing the cost of the battery and increasing the energy density of the battery.
[0102] In this embodiment, the heat insulation component 2 separates the exhaust channel 13, thereby preventing the battery cells 210 in the direction of the first sidewall 11 and the second sidewall 12 from affecting each other during thermal runaway.
[0103] In one embodiment, along a first direction, the projection of the first exhaust portion 111 and the projection of the second exhaust portion 121 at least partially overlap to form an overlapping area, and the projection of the heat insulation member 2 at least covers the overlapping area.
[0104] In the first direction, the projection of the first exhaust portion 111 and the projection of the second exhaust portion 121 overlap to form an overlapping area. The projection of the heat insulation member 2 covers at least the overlapping area. In this way, the heat insulation member 2 can prevent the battery cells 210 in the directions of the first sidewall 11 and the second sidewall 12 from affecting each other during thermal runaway.
[0105] In one embodiment, the structural beam 100 extends along a second direction, the first sidewall 11 has a plurality of first exhaust vents 111, the second sidewall 12 has a plurality of second exhaust vents 121, and the heat insulation member 2 extends along the second direction and is located between the first sidewall 11 and the second sidewall 12.
[0106] In this embodiment, the heat insulation component 2 extends in the same direction as the structural beam 100, which not only facilitates blocking the emissions ejected from the first exhaust section 111 and the second exhaust section 121, but also facilitates the installation of the heat insulation component 2. Specifically, the heat insulation component can be smoothly installed inside the structural beam 100 along the extension direction of the structural beam 100.
[0107] In one embodiment, the heat insulation member 2 divides the exhaust passage 13 into a first passage 131 and a second passage 132, the first passage 131 being connected to the first exhaust portion 111 and the second passage 132 being connected to the second exhaust portion 121.
[0108] Please see Figure 4 In this embodiment, the exhaust material ejected from the first exhaust section 111 enters the first channel 131, and the exhaust material ejected from the second exhaust section 121 enters the second channel 132, so as to avoid mutual interference.
[0109] In one embodiment, the heat insulation element 2 is configured to be movably disposed within the exhaust channel 13 along a first direction to change the size of the first channel 131 or the second channel 132.
[0110] The heat insulation component 2 can move actively or passively along the line connecting the first sidewall 11 and the second sidewall 12, thereby changing the size of the first channel 131 and the second channel 132. Thus, when a battery cell 210 on one side experiences thermal runaway, the size of the first channel 131 or the second channel 132 can be increased accordingly, thereby improving exhaust efficiency and enhancing battery safety. Specifically, the heat insulation component 2 can move under the action of the high-temperature gas emitted from the battery cell 210. It can also move under the action of an external driving component. The external driving component can be any structure or device capable of driving the heat insulation component 2 to move in any direction or along any trajectory, such as a telescopic cylinder, a telescopic hydraulic cylinder, or a motor guide structure. Furthermore, the external driving component can be connected to a sensor or controller. Thus, when high-temperature gas appears in the space on one side of the heat insulation component 2, the external driving component can move to the other side under the instruction of the sensor or controller, thereby expanding the exhaust space on the runaway side of the battery cell 210.
[0111] In this embodiment, the heat insulation component 2 can change the size of the first channel 131 and the second channel 132. When a battery cell 210 on one side experiences thermal runaway, the size of the first channel 131 or the second channel 132 can be increased accordingly, thereby improving the exhaust efficiency and enhancing the safety of the battery 200.
[0112] In one embodiment, the structural beam 100 further includes a support member 14 for fixing the thermal insulation member 2.
[0113] Please see Figure 4 and Figure 5One or more support members 14 can be provided. The support member 14 can be connected to the heat insulation member 2 and the structural beam 100 simultaneously. The specific connection method can be glue bonding or snap-fit connection, so that the support member 14 can ensure the position and orientation of the heat insulation member 2 under normal conditions. When the battery cell 210 thermally runs away and sprays gas into the exhaust channel 13, the heat insulation member 2 can melt. At this time, the heat insulation member 2 loses the support of the support member 14. It can move under the impetus of the gas sprayed out by the runaway battery cell 210, thereby expanding the exhaust space on one side of the runaway battery cell 210. Moreover, the heat insulation member 2 will adhere to the side wall on the opposite side of the runaway battery cell 210 and block the hole on the side wall. In this way, the high temperature gas sprayed out by the runaway battery cell 210 can be prevented from directly spraying the opposite battery cell 210, thereby avoiding a chain reaction. This embodiment utilizes the characteristic that the support member 14 can be melted under high-temperature gas, allowing the heat insulation member 2 to adaptively adjust its position, thus transforming the entire inner cavity of the beam into an exhaust space for the runaway battery cell 210, thereby improving the exhaust effect. In this embodiment, the support member 14 can ensure the position and orientation of the heat insulation member 2 under normal conditions.
[0114] In one embodiment, at least a portion of the support 14 is configured to react with the emissions from the battery cell 210 to enable the heat insulation 2 to be movable in a first direction.
[0115] At least a portion of the support member 14 can react with the emissions from the battery cell 210. This reaction includes both physical and chemical reactions. Thus, the support member 14 can be composed of multiple components; once any component undergoes reaction and burns, the support member 14 loses its supporting function. It can melt when the battery cell 210 experiences thermal runaway and ejects gas into the exhaust channel 13. In this way, the heat insulation member 2 can move under the impingement of the gas ejected from the runaway battery cell 210, thereby expanding the exhaust space on one side of the runaway battery cell 210.
[0116] In one embodiment, at least a portion of the support 14 is configured to be melted when the emissions from the battery cell 210 are discharged into the exhaust channel 13.
[0117] The support member 14 can melt when the battery cell 210 ejects emissions. The specific melting point of the support member 14 can be set according to actual conditions; for example, the melting point can be set to 150°C to 300°C. In this way, the heat insulation member 2 can move under the impingement of the gas ejected from the runaway battery cell 210, thereby expanding the exhaust space on one side of the runaway battery cell 210. In one embodiment, the support member 14 is foam or plastic. Foam and plastic have a certain structural strength and a low melting point at room temperature, and can melt relatively quickly when the battery cell 210 thermally runs away, so that the heat insulation member 2 can move under the impingement of the gas ejected from the runaway battery cell 210.
[0118] In one embodiment, the structural beam 100 has an exhaust spacing C that satisfies: AB = C, 3mm ≤ C ≤ 50mm, where A is the distance between the first sidewall 11 and the second sidewall 12, and B is the thickness of the heat insulation member 2.
[0119] Please see Figure 5 The exhaust spacing C characterizes the effective exhaust cross-sectional area of the exhaust channel 13. When the heat insulation component 2 is too thick and the distance between the first sidewall 11 and the second sidewall 12 is too narrow, the effective exhaust cross-sectional area of the exhaust channel 13 becomes too narrow, affecting the exhaust efficiency. When the heat insulation component 2 is too thin and the distance between the first sidewall 11 and the second sidewall 12 is too large, the structural beam 100 occupies too much volume, wasting space inside the battery. Therefore, this embodiment limits the exhaust spacing C to ensure that the exhaust channel 13 has a better exhaust effect, thereby improving battery safety; it also takes into account the miniaturization of the structural beam 100 to improve the volume utilization rate of the battery.
[0120] In one embodiment, the structural beam 100 is further provided with a reinforcing member 3, which is disposed in the exhaust channel 13 and located between the first side wall 11 and the second side wall 12. The reinforcing member 3 divides the exhaust channel 13 into a first sub-channel 31 and a second sub-channel 32. The reinforcing member 3 is provided with a connecting hole 33 that connects the first sub-channel 31 and the second sub-channel 32.
[0121] Please see Figure 6 and Figure 7 The reinforcing member 3 can be a flat plate structure, which is disposed in the exhaust channel 13 along the length of the structural beam 100, thereby dividing the exhaust channel 13 into a first sub-channel 31 and a second sub-channel 32. The reinforcing member 3 can be integrally formed with the structural beam 100, or the reinforcing member 3 can be connected to the structural beam 100 by bolts, rivets or other connecting parts.
[0122] The reinforcing member 3 is also provided with a connecting hole 33. The cross-sectional shape of the connecting hole 33 can be circular, elliptical, semi-circular, trapezoidal, square, or a combination thereof. The number of connecting holes 33 can be one or more. Preferably, the number of connecting holes 33 matches the number of first exhaust parts 111 or the number of second exhaust parts 121, and the position of the connecting holes 33 can match the first exhaust parts 111 and / or the second exhaust parts 121.
[0123] The reinforcing member 3 improves the structural strength of the structural beam 100. The connecting hole 33 on the reinforcing member 3 can ensure that the gas ejected from the battery cell 210 is ejected from the first sub-channel 31 and the second sub-channel 32, thereby improving the exhaust efficiency.
[0124] In one embodiment, along the first direction, both the first exhaust portion 111 and the second exhaust portion 121 are misaligned with the connecting hole 33.
[0125] Referring to the aforementioned misalignment concept, in this embodiment, both the first exhaust section 111 and the second exhaust section 121 are misaligned with the connecting hole 33, which can prevent the gas ejected from the connecting hole 33 from directly hitting the first exhaust section 111 or the second exhaust section 121, thereby preventing the battery cell 210 from being directly sprayed by high-temperature gas.
[0126] In one embodiment, there are multiple first exhaust portions 111, second exhaust portions 121, and connecting holes 33. The multiple connecting holes 33 include a first connecting hole. Along the first direction, one of any adjacent first exhaust portions 111 and second exhaust portions 121 coincides with the projection of the first connecting hole, while the other is misaligned with the projection of the first connecting hole.
[0127] It is understandable that having multiple first exhaust sections 111, second exhaust sections 121, and connecting holes 33 can improve exhaust efficiency. In the first direction, one of the adjacent first exhaust sections 111 and second exhaust sections 121 coincides with the first connecting hole, while the other is misaligned with the first connecting hole. This can prevent the gas ejected from the first connecting hole from directly hitting the first exhaust section 111 or the second exhaust section 121, thereby preventing the battery cell 210 from being directly sprayed by high-temperature gas.
[0128] In one embodiment, the reinforcing member 3 includes a first connecting end 34 and a second connecting end 35 disposed opposite to each other, the first connecting end 34 and the second connecting end 35 being connected to two opposite side walls of the structural beam 100 respectively.
[0129] Please see Figure 6 and Figure 7 The first connecting end 34 and the second connecting end 35 can be respectively disposed at both ends of the reinforcing member 3. The first connecting end 34 and the second connecting end 35 are respectively supported on the opposite sides of the structural beam 100, which can further improve the structural strength of the structural beam 100.
[0130] In one embodiment, the first connecting end 34 includes a forked first sub-connecting portion 341 and a second sub-connecting portion 342, the first sub-connecting portion 341 being connected to the first sidewall 11 and the second sub-connecting portion 342 being connected to the second sidewall 12.
[0131] Please see Figure 6 and Figure 7 Both the first sub-connecting part 341 and the second sub-connecting part 342 extend outward from the main body of the reinforcing member 3. They fork and form a certain angle. The first sub-connecting part 341 and the second sub-connecting part 342 are respectively supported on the first side wall 11 and the second side wall 12. Thus, the first connecting end 34 roughly forms a triangular structure, which further improves the structural strength of the structural beam 100.
[0132] In one embodiment, the second connection end 35 includes a forked third sub-connection portion 351 and a fourth sub-connection portion 352, the third sub-connection portion 351 being connected to the first sidewall 11 and the fourth sub-connection portion 352 being connected to the second sidewall 12.
[0133] Please see Figure 6 and Figure 7 Both the third sub-connection 351 and the fourth sub-connection 352 extend outward from the main body of the reinforcing member 3. They fork and form a certain angle. The third sub-connection 351 and the fourth sub-connection 352 are respectively supported on the first side wall 11 and the second side wall 12. Thus, the second connection end 35 roughly forms a triangular structure, which further improves the structural strength of the structural beam 100.
[0134] In one embodiment, the structural beam 100 further includes protective members, including a first protective member 4 and a second protective member 5. The first protective member 4 is located between the first exhaust portion 111 and the connecting hole 33, and the second protective member 5 is located between the second exhaust portion 121 and the connecting hole 33.
[0135] Please see Figure 6 and Figure 7 The first protective component 4 and the second protective component 5 can both be flat structures and can be made of high-temperature resistant and heat-insulating materials, such as asbestos, calcium silicate fiber, magnesium cementitious materials, etc. The first protective component 4 can block high-temperature gas from entering the second sub-channel 32 from the first sub-channel 31 along the connecting hole 33, and the second protective component 5 can block high-temperature gas from entering the first sub-channel 31 from the second sub-channel 32 along the connecting hole 33, thereby avoiding mutual influence between the battery cells 210 on both sides.
[0136] In one embodiment, the first protective member 4 and the second protective member 5 are respectively provided with vent holes. It can be understood that providing vent holes can make full use of the exhaust channel to enhance the exhaust capacity.
[0137] In one embodiment, the vent includes a first vent 41 and a second vent 52. The first vent 41 is disposed on the first protective member 4, and the projection of the first vent 41 in the first direction is misaligned with the first exhaust portion 111. The second vent 52 is disposed on the second protective member 5, and the projection of the second vent 52 in the first direction is misaligned with the second exhaust portion 121.
[0138] Please see Figure 6 and Figure 7 By designing the above-mentioned positional relationship between holes, the first protective component 4 can block the direct injection of high-temperature gas into the first exhaust section 111, and the second protective component 5 can block the direct injection of high-temperature gas into the second exhaust section 121, thereby avoiding a chain reaction caused by the high-temperature gas generated by the runaway battery cell 210.
[0139] In one embodiment, along the first direction, the vent hole and the connecting hole 33 at least partially overlap in projection. This overlap between the vent hole and the connecting hole 33 improves exhaust efficiency.
[0140] Specifically, taking the thermal runaway of the battery cell 210 abutting against the first sidewall 11 as an example: the battery cell 210 sprays gas along the first exhaust section 111 into the space between the first protective member 4 and the first sidewall 11. Because the first exhaust section 111 and the first vent 41 on the first protective member 4 do not coincide, the high temperature gas cannot be directly sprayed into the space between the first protective member 4 and the reinforcing member 3. However, as the jetting process continues, the high-temperature gas will enter the space between the first protective member 4 and the reinforcing member 3 along the first vent 41. Since the first vent 41 and the connecting hole 33 overlap at least partially, some of the high-temperature gas can enter the space between the reinforcing member 3 and the second protective member 5 along the connecting hole 33. Some of the high-temperature gas between the reinforcing member 3 and the second protective member 5 will enter the space between the second protective member 5 and the second side wall 12 along the second vent 52. Since the projection of the second vent 52 in the direction of the line connecting the first side wall 11 and the second side wall 12 does not overlap with the second exhaust part 121, the high-temperature gas cannot be directly sprayed into the second exhaust part 121, thereby avoiding the direct impact of the high-temperature gas on the battery cell 210 behind the second exhaust part 121, and thus avoiding thermal runaway of the battery cell 210 that is in contact with the second side wall 12. In this embodiment, the staggered design of the first vent 41 and the first exhaust portion 111 avoids the direct injection of high-temperature gas into the space between the first protective member 4 and the reinforcing member 3, thereby improving the exhaust utilization rate of the space between the first sidewall 11 and the first protective member 4. The overlapping design of the first vent 41 and the connecting hole 33 improves the efficiency of high-temperature gas entering the space between the reinforcing member 3 and the second protective member 5, thereby making better use of the space between the reinforcing member 3 and the second protective member 5 for exhaust. In addition, the staggered design between the second vent 52 and the second exhaust portion 121 avoids the battery cell 210 behind the second exhaust portion 121 from being directly affected by high-temperature gas, thereby improving safety.
[0141] Since the structural beam 100 can be roughly regarded as a symmetrical structure with the reinforcing member 3 as the center of symmetry, when the battery cell 210 abutting the second side wall 12 experiences thermal runaway, its exhaust process and exhaust effect are similar to those described above, and will not be repeated here.
[0142] In one embodiment, the structural beam 100 further includes a first heat-insulating retainer 42 and a second heat-insulating retainer 53. The first heat-insulating retainer 42 fixes the first protective member 4 to the structural beam 100, and the second heat-insulating retainer 53 fixes the second protective member 5 to the structural beam 100. The first heat-insulating retainer 42 and the second heat-insulating retainer 53 can melt when the battery cell 210 sprays air into the exhaust channel 13.
[0143] Please see Figure 6 and Figure 7 One or more of the first heat-insulating retainer 42 and the second heat-insulating retainer 53 can be provided. These components connect the first protective element 4 and the second protective element 5 to the structural beam 100. The connection method can be adhesive bonding or snap-fitting, etc. Under normal circumstances, the first heat-insulating retainer 42 and the second heat-insulating retainer 53 can maintain the position and orientation of the first protective element 4 and the second protective element 5. When the battery cell 210 experiences thermal runaway, the first heat-insulating retainer 42 and the second heat-insulating retainer 53 will melt.
[0144] In one embodiment, the first heat insulation retainer 42 and the second heat insulation retainer 53 are made of foam or plastic. Foam or plastic is low in cost and lightweight, which helps to reduce battery cost and increase battery energy density.
[0145] This application provides a box body, which includes the structural beam 100 of any of the above-mentioned structures, and obviously has the advantages of the structural beam 100.
[0146] This application provides a battery 200, which includes a plurality of battery cells 210 and a structural beam 100 as described above, or the battery 200 includes a plurality of battery cells 210 and a housing as described above, the housing being used to accommodate the plurality of battery cells 210.
[0147] When the battery cell 210 inside the battery 200 fails, it can promptly release high-temperature gas without affecting the surrounding battery cells 210, thus ensuring good safety.
[0148] In one embodiment, at least one battery cell 210 is connected to the first sidewall 11 of the structural beam 100, and at least another battery cell 210 is connected to the second sidewall 12 of the structural beam 100. The battery cells 210 are positioned on both sides of the structural beam 100, improving the safety of the battery 200.
[0149] This application provides an electrical device 300, which includes the aforementioned battery 200. The battery 200 is used to provide power to the electrical device 300. The electrical device 300 obviously has the advantages of the aforementioned structural beam 100, which will not be repeated here, and it is also safer.
[0150] Based on some embodiments of this application, a specific embodiment is given, which illustrates the effect of thermal runaway of a battery cell 210 abutting against the first sidewall 11 as an example:
[0151] The structural beam 100 includes a first sidewall 11 and a second sidewall 12, with an exhaust channel 13 formed between the first sidewall 11 and the second sidewall 12. The first sidewall 11 has a first exhaust portion 111, and the second sidewall 12 has a second exhaust portion 121. A reinforcing member 3 is provided in the exhaust channel 13, and a connecting hole 33 is provided on the reinforcing member 3. The structural beam 100 also includes protective members, including a first protective member 4 and a second protective member 5. The first protective member 4 is located between the first exhaust portion 111 and the connecting hole 33, and the second protective member 5 is located between the second exhaust portion 121 and the connecting hole 33.
[0152] The battery cell 210 sprays gas along the first exhaust section 111 into the space between the first protective member 4 and the first side wall 11. Because the first exhaust section 111 does not coincide with the first vent hole 41 on the first protective member 4, the high-temperature gas cannot be directly sprayed into the space between the first protective member 4 and the reinforcing member 3. However, as the jetting process continues, the high-temperature gas will enter the space between the first protective member 4 and the reinforcing member 3 along the first vent 41. Since the first vent 41 and the connecting hole 33 overlap at least partially, some of the high-temperature gas can enter the space between the reinforcing member 3 and the second protective member 5 along the connecting hole 33. Some of the high-temperature gas between the reinforcing member 3 and the second protective member 5 will enter the space between the second protective member 5 and the second side wall 12 along the second vent 52. Since the projection of the second vent 52 in the direction of the line connecting the first side wall 11 and the second side wall 12 does not overlap with the second exhaust part 121, the high-temperature gas cannot be directly sprayed into the second exhaust part 121, thereby avoiding the direct impact of the high-temperature gas on the battery cell 210 behind the second exhaust part 121, and thus avoiding thermal runaway of the battery cell 210 that is in contact with the second side wall 12.
[0153] The reinforcing member 3 within the structural beam 100 includes a first connecting end 34 and a second connecting end 35 disposed opposite to each other. The first connecting end 34 and the second connecting end 35 are respectively connected to two opposite side walls of the structural beam 100. The first connecting end 34 includes a forked first sub-connecting portion 341 and a forked second sub-connecting portion 342. The first sub-connecting portion 341 is connected to the first side wall 11, and the second sub-connecting portion 342 is connected to the second side wall 12. The second connecting end 35 includes a forked third sub-connecting portion 351 and a forked fourth sub-connecting portion 352. The third sub-connecting portion 351 is connected to the first side wall 11, and the fourth sub-connecting portion 352 is connected to the second side wall 12. Thus, the first connecting end 34 and the second connecting end 35 can be respectively disposed at both ends of the reinforcing member 3, and the first connecting end 34 and the second connecting end 35 are correspondingly supported on opposite sides of the structural beam 100, further improving the structural strength of the structural beam 100.
[0154] Furthermore, both the first sub-connecting portion 341 and the second sub-connecting portion 342 extend outward from the main body of the reinforcing member 3, forking and forming a certain angle. The first sub-connecting portion 341 and the second sub-connecting portion 342 are respectively supported by the first side wall 11 and the second side wall 12. Thus, the first connecting end 34 roughly forms a triangular structure, further improving the structural strength of the structural beam 100. Both the third sub-connecting portion 351 and the fourth sub-connecting portion 352 extend outward from the main body of the reinforcing member 3, forking and forming a certain angle. The third sub-connecting portion 351 and the fourth sub-connecting portion 352 are respectively supported by the first side wall 11 and the second side wall 12. Thus, the second connecting end 35 roughly forms a triangular structure, further improving the structural strength of the structural beam 100.
[0155] In this embodiment, the staggered design of the first vent 41 and the first exhaust portion 111 avoids the direct injection of high-temperature gas into the space between the first protective member 4 and the reinforcing member 3, thereby improving the exhaust utilization rate of the space between the first sidewall 11 and the first protective member 4. The overlapping design of the first vent 41 and the connecting hole 33 improves the efficiency of high-temperature gas entering the space between the reinforcing member 3 and the second protective member 5, thereby making better use of the space between the reinforcing member 3 and the second protective member 5 for exhaust. In addition, the staggered design between the second vent 52 and the second exhaust portion 121 avoids the battery cell 210 behind the second exhaust portion 121 from being directly affected by high-temperature gas, thereby improving safety.
[0156] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A structural beam for a battery, said battery comprising a plurality of battery cells, characterized in that, The structural beam includes: A first sidewall and a second sidewall, wherein an exhaust channel is formed between the first sidewall and the second sidewall, and the first sidewall and the second sidewall are arranged opposite to each other along a first direction. The first sidewall has a first exhaust portion for receiving emissions from at least one of the battery cells. The second sidewall has a second exhaust portion for receiving emissions from at least one other battery cell. The first exhaust portion and the second exhaust portion are disposed opposite each other along the first direction. The structural beam also includes a heat insulation member disposed between the first exhaust portion and the second exhaust portion. The heat insulation member divides the exhaust channel into a first channel and a second channel. The first channel communicates with the first exhaust portion, and the second channel communicates with the second exhaust portion. The heat insulation member is configured to be movably disposed within the exhaust channel along the first direction to change the size of the first channel or the second channel.
2. The structural beam according to claim 1, characterized in that, Along the first direction, the first exhaust section and the second exhaust section are arranged in a staggered manner.
3. The structural beam according to claim 1, characterized in that, Along the first direction, the projection of the first exhaust portion and the projection of the second exhaust portion at least partially overlap to form an overlapping area, and the projection of the heat insulation member at least covers the overlapping area.
4. The structural beam according to claim 3, characterized in that, The structural beam extends along a second direction, and the first sidewall has a plurality of first exhaust ports, and the second sidewall has a plurality of second exhaust ports. The thermal insulation element extends along the second direction and is located between the first sidewall and the second sidewall.
5. The structural beam according to claim 1, characterized in that, The structural beam also includes a support member for fixing the thermal insulation component.
6. The structural beam according to claim 5, characterized in that, At least a portion of the support is configured to react with the emissions from the battery cell, thereby enabling the thermal insulation to move along the first direction.
7. The structural beam according to claim 6, characterized in that, At least a portion of the support is configured to be melted when the emissions from the battery cell are discharged into the exhaust channel.
8. The structural beam according to any one of claims 1-7, characterized in that, The structural beam is also provided with a reinforcing member, which is disposed in the exhaust channel and located between the first side wall and the second side wall. The reinforcing member divides the exhaust channel into a first sub-channel and a second sub-channel, and the reinforcing member is provided with a connecting hole connecting the first sub-channel and the second sub-channel.
9. The structural beam according to claim 8, characterized in that, Along the first direction, both the first exhaust portion and the second exhaust portion are misaligned with the connecting hole.
10. The structural beam according to claim 8, characterized in that, The first exhaust section, the second exhaust section, and the communicating hole each have multiple portions, and the multiple communicating holes include the first communicating hole. Along the first direction, one of any two adjacent first exhaust sections and second exhaust sections coincides with the projection of the first connecting hole, while the other is misaligned with the projection of the first connecting hole.
11. The structural beam according to claim 8, characterized in that, The reinforcing member includes a first connecting end and a second connecting end disposed opposite to each other, and the first connecting end and the second connecting end are respectively connected to two side walls opposite to the structural beam.
12. The structural beam according to claim 11, characterized in that, The first connecting end includes a first sub-connecting part and a second sub-connecting part that are forked together. The first sub-connecting part is connected to the first sidewall, and the second sub-connecting part is connected to the second sidewall.
13. The structural beam according to claim 11, characterized in that, The second connection end includes a third sub-connection portion and a fourth sub-connection portion that are bifurcated. The third sub-connection portion is connected to the first sidewall, and the fourth sub-connection portion is connected to the second sidewall.
14. The structural beam according to claim 8, characterized in that, The structural beam also includes protective components, which include a first protective component and a second protective component. The first protective component is located between the first exhaust portion and the connecting hole, and the second protective component is located between the second exhaust portion and the connecting hole.
15. The structural beam according to claim 14, characterized in that, Both the first protective component and the second protective component are provided with ventilation holes.
16. The structural beam according to claim 15, characterized in that, The vent includes a first vent and a second vent. The first vent is disposed on the first protective member, and the projection of the first vent in the first direction is misaligned with the first exhaust portion. The second vent is disposed on the second protective member, and the projection of the second vent in the first direction is misaligned with the second exhaust portion.
17. The structural beam according to claim 15, characterized in that, Along the first direction, the vent hole and the connecting hole at least partially overlap in projection.
18. A box, characterized in that, The box body includes structural beams as described in any one of claims 1-17.
19. A battery, characterized in that, The battery comprises a plurality of battery cells and a structural beam as described in any one of claims 1-17, or, The battery includes a plurality of battery cells and a housing as described in claim 18, the housing being used to house the plurality of battery cells.
20. The battery according to claim 19, characterized in that, At least one of the battery cells is connected to the first sidewall of the structural beam, and at least another battery cell is connected to the second sidewall of the structural beam.
21. An electrical appliance, characterized in that, The electrical device includes the battery according to any one of claims 19-20, the battery being used to provide power to the electrical device.