Battery pack and electric device

Abstract

The application relates to the battery technical field and discloses a battery pack and a power utilization equipment, which comprises a first beam body, a cover plate, a partition plate and a bottom plate. The first beam body comprises a first beam main body and a mounting piece connected with each other, the first beam main body is provided with an exhaust passage, the mounting piece is located on one side of the first beam main body along a second direction, the mounting piece is provided with a penetrating air inlet, the air inlet is communicated with the exhaust passage, the cover plate is connected with one end of the first beam main body which is away from the mounting piece, the partition plate is connected with the mounting piece, the partition plate, the first beam main body and the cover plate surround a containing cavity, a plurality of pressure relief parts are arranged on the partition plate, a gas collecting cavity is formed between the bottom plate and the partition plate, the gas collecting cavity is communicated with the air inlet, the bottom plate is connected with one end of the first beam main body which is away from the cover plate, and the end part of the partition plate which is close to the air inlet along the second direction is arranged in a spaced mode with the air inlet. The battery pack disclosed by the application reduces the material consumption of the partition plate.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack and electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] During battery use, the battery pack includes a first beam and separators mounted on the first beam. The first beam has an air inlet. In existing technologies, the separator needs to have a clearance hole to avoid the air inlet, which wastes a significant amount of separator material. Therefore, how to reduce the amount of separator material used is a pressing technical problem that needs to be solved in battery technology. Utility Model Content

[0004] This application provides a battery pack and an electrical device that reduces the amount of material used in the battery pack's separators.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide a battery pack, including a first beam, a cover plate, a separator, and a bottom plate; the first beam includes a connected first beam body and a mounting component, the first beam body having an exhaust channel, the mounting component being located on one side of the first beam body along a second direction, the mounting component having a through air inlet communicating with the exhaust channel, the cover plate being connected to the end of the first beam body away from the mounting component, the separator being connected to the mounting component, the separator, the first beam body, and the cover plate forming an accommodating cavity, the separator having multiple pressure relief sections, a gas collecting cavity being formed between the bottom plate and the separator, the gas collecting cavity communicating with the air inlet, the bottom plate being connected to the end of the first beam body away from the cover plate; the end of the separator near the air inlet along the second direction is spaced apart from the air inlet.

[0007] The battery pack proposed in this application embodiment has a separator that is spaced apart from the air inlet at one end along the second direction. This arrangement eliminates the need for separate clearance holes on the separator. The spaced arrangement of one end of the separator from the air inlet reduces the overall area of ​​the separator, thereby reducing the amount of material used in the separator, which helps to reduce costs and improve the overall lightweight effect.

[0008] Optionally, the battery pack also includes multiple battery cells, which are disposed within the accommodating cavity; each battery cell has a second explosion-proof valve facing the partition, and multiple second explosion-proof valves are arranged opposite to multiple pressure relief parts, and the mounting member extends along the second direction toward the direction close to the battery cell, and the partition is connected to the side of the mounting member near the bottom plate.

[0009] In the above scheme, the partition is connected to the side of the mounting component near the bottom plate, which can separate the inside of the battery pack into independent chambers. This facilitates the separation of the gas inside the battery pack from the battery, thereby improving the reliability of the battery pack and ensuring its safety. When the internal pressure of a battery cell rises sharply due to abnormal conditions such as internal short circuit, overcharging, or thermal runaway, the second explosion-proof valve will open to discharge the high-temperature and high-pressure gas in a timely manner. Since the second explosion-proof valve is set opposite to the corresponding pressure relief part, the discharged high-temperature and high-pressure gas can be directly and quickly released into the gas collection chamber through the pressure relief part, avoiding the accumulation of high-pressure gas in the containment chamber and preventing serious accidents such as explosions caused by excessive internal pressure in the battery pack, thus ensuring the safe operation of the battery pack.

[0010] Optionally, the battery pack also has a third direction perpendicular to the second direction, with the end of the partition near the air inlet along the second direction being the first end, which is arranged parallel to the third direction.

[0011] In the above scheme, the parallel arrangement of the first end and the third direction can further reduce the probability of spatial interference between the first seal and the air inlet, ensuring smooth exhaust. At the same time, it allows the first seal to have sufficient arrangement area, which facilitates the arrangement of the first seal and helps to reduce the probability of gas leakage from the partition and the mounting at the air inlet, thereby improving the sealing effect between the partition and the mounting.

[0012] Optionally, along the first direction, the battery pack further includes a first seal that abuts against the mounting member and the partition, and along the second direction, a first end is located between the first seal and the air inlet.

[0013] In the above scheme, the first end is located between the first seal and the air inlet, so that there is a gap between the first seal and the air inlet, which reduces the probability of spatial interference between the first seal and the air inlet, ensuring smooth exhaust. At the same time, it provides sufficient arrangement area for the first seal, which facilitates the arrangement of the first seal, and helps to reduce the probability of gas leakage from the partition and the mounting at the air inlet, thereby improving the sealing effect between the partition and the mounting.

[0014] Optionally, the battery pack also has a first direction perpendicular to both the second and third directions. Along the first direction, a sealing groove is provided on the side of the mounting member facing the base plate. The sealing groove extends along the third direction. A first seal is disposed in the sealing groove and abuts against the mounting member and the partition along the first direction.

[0015] In the above scheme, the first seal is sealed in the sealing groove, which improves the sealing effect between the mounting part and the partition. It can be understood that setting a gap between the partition and the air inlet, compared with the structure of setting a clearance hole in the partition, can reduce the bending of the first seal, increase the sealing points, and make the sealing effect better, which helps to improve the sealing effect between the sealing groove and the first seal.

[0016] Optionally, the battery pack also includes a plurality of locking members spaced apart along a third direction. The separator is connected to the mounting member through the locking members. The first seal has a plurality of sub-recesses spaced apart along a third direction. The sub-recesses and the locking members are spaced apart along a second direction.

[0017] In the above scheme, the recessed part and the locking part are spaced apart, which reduces the probability of spatial interference between the first seal and the locking part, ensures that the locking part has a sufficient arrangement area, facilitates the arrangement of the locking part, thereby helping to ensure the sealing effect of the first seal and reduce the probability of gas leakage between the partition and the mounting part.

[0018] Optionally, the battery pack also includes a protective cover, which is connected to the side of the first beam body away from the mounting member along the second direction. The protective cover has an exhaust chamber. The exhaust channel has an air outlet, which is located on the side of the first beam body away from the mounting member and is connected to the exhaust chamber.

[0019] In the above scheme, the exhaust channel, exhaust chamber and vent form a dedicated exhaust path inside the battery pack, which allows the gas to flow rapidly. This design can reduce the residence time of the gas in the battery pack, improve exhaust efficiency, and promptly discharge the high-temperature and high-pressure gas generated inside the battery pack, thereby improving the safety of the battery pack.

[0020] Optionally, the battery pack also has a first direction perpendicular to the second direction, the first beam also includes an exhaust seat, the mounting member is located on the side of the first beam body close to the mounting member and connected to the mounting member, the exhaust seat has a mounting surface, the mounting surface is inclined to the plane containing the second direction and the first direction, the battery pack also includes a smoke sensor, the smoke sensor includes a connected sensing part and a body part, the sensing part is disposed in the mounting surface located in the exhaust channel.

[0021] In the above scheme, the smoke sensor is set on an inclined mounting surface, which reduces the spatial interference of the first beam during the installation of the smoke sensor. The smoke sensor can be installed on the mounting surface more conveniently, the operation redundancy of the staff is better, and the convenience of installing the smoke sensor is improved.

[0022] Optionally, the battery pack also includes a first explosion-proof valve, which is connected to the main body of the first beam and seals the exhaust passage.

[0023] In the above scheme, the first explosion-proof valve can play a role in pressure relief. During the charging and discharging process of the battery, especially under abnormal conditions (such as short circuit, thermal runaway, etc.), a large amount of high temperature and high pressure gas will be rapidly generated inside, causing the pressure inside the battery pack to rise sharply. When the pressure inside the battery pack exceeds the set threshold of the first explosion-proof valve, the explosion-proof valve will automatically open to release gas and reduce pressure, thereby preventing the battery pack from exploding due to excessive internal pressure and effectively protecting the safety of personnel and equipment.

[0024] Secondly, embodiments of this application provide an electrical device including the battery pack of any of the above embodiments.

[0025] The electrical equipment proposed in this application embodiment improves the lightweight effect due to the aforementioned battery pack. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the exhaust channel in some embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the overall inverted exploded structure of the battery pack in some embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the first beam in some embodiments of this application;

[0030] Figure 4 This is a partial structural diagram of the battery pack in some embodiments of this application;

[0031] Figure 5 This is a side view of the structure at the first beam in some embodiments of this application;

[0032] Figure 6 This is a partial structural diagram of the battery pack in some embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the structure of the first seal in some embodiments of this application.

[0034] Figure 8 This is a bottom view structural diagram of a portion of the main body of the first beam in some embodiments of this application;

[0035] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure along the AA direction;

[0036] Figure 10 This is a partial structural schematic diagram of the first beam body in some embodiments of this application.

[0037] [Explanation of Labels in the Attached Image]

[0038] 101: Base plate; 102: Cover plate;

[0039] 11: First beam body; 211: Main body of the first beam; 211a: Air outlet; 212: Protective cover; 212a: Exhaust chamber;

[0040] 111: Exhaust passage; 1113: Third side;

[0041] 112: Installation component;

[0042] 113: Air intake;

[0043] 1141: Sealing groove;

[0044] 1146: Sub-depression;

[0045] 115: Exhaust mount;

[0046] 2: Partition; 201: Pressure relief section; 21: First end; 22: Protrusion;

[0047] 3: Individual battery cells;

[0048] 4: Receptacle cavity;

[0049] 5: Air collection chamber;

[0050] 6: First seal;

[0051] 7: Locking components;

[0052] 8: Smoke sensor; 8a: Sensing unit; 8b: Main body;

[0053] 9: First explosion-proof valve; 91: Second explosion-proof valve;

[0054] X: Third direction; Y: Second direction; Z: First direction. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0057] 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, the term "and / or" 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0061] As an example, a battery cell includes a cell formed by using positive and negative electrode plates as electrochemical material carriers, separating the positive and negative electrode plates through a separator to prevent short circuits, using an electrolyte as an ion transport carrier, providing structural protection through a casing, and connecting to an external circuit through terminals.

[0062] As an example, the battery cell includes at least one of the following: a square battery cell with a steel or aluminum casing, a plastic-cased battery, a pouch battery cell, or a cylindrical battery cell.

[0063] In some embodiments, the square aluminum-cased battery includes an end cap, which may have a positive electrode terminal and a negative electrode terminal on one end face in the thickness direction. A square aluminum shell is connected to the bottom of the end cap, and the edge of the square aluminum shell is attached to the edge of the end cap to jointly enclose a receiving space.

[0064] The bottom spacer has a negative electrode tab on the end face away from the accommodating space in the vertical thickness direction, and the outer shell is the negative end.

[0065] The end face of the cap, on the side away from the receiving space in the vertical thickness direction, is provided with a positive terminal, and the end face of the cap, on the side closer to the receiving space in the vertical thickness direction, is provided with a positive electrode tab.

[0066] In some embodiments, battery cells are combined in series and parallel, fixed by an external frame, and connected to a battery management module with signal detection and a thermal management system for cooling to form a battery pack.

[0067] The batteries disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using battery cells and batteries as disclosed in this application.

[0068] This application provides an electrical device that uses a battery pack as a power source. The electrical device can be, but is not limited to, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc.

[0069] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0070] The vehicle includes one of the following: gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles include, but are not limited to, pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. A battery is located at the bottom, front, or rear of the vehicle. The battery powers the vehicle. As the vehicle's operating power source, the battery supplies power to the vehicle's electrical system, including meeting the power requirements for starting, navigation, and operation.

[0071] The vehicle also includes a controller and a motor. The controller is used to control the battery to power the motor, including meeting the power needs of the vehicle during startup, navigation, and driving.

[0072] In some embodiments of this application, the battery pack can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0073] The battery pack includes a housing and individual battery cells housed therein. The housing can have various structures. In some embodiments, the housing includes a first sub-housing and a second sub-housing, which are combined to form the housing, and together define a receiving space for accommodating the individual battery cells. The second sub-housing includes a square structural member with an opening on one side, and the first sub-housing includes a square structural member with an opening on one side. The openings of the first and second sub-housings are correspondingly combined so that the first and second sub-housings together define the receiving space. The first sub-housing includes a plate-like structural member, and the openings of the first and second sub-housings are closed on one side.

[0074] In a battery pack, there are multiple battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these battery cells is housed within a casing. Alternatively, the battery pack can consist of multiple battery cells first connected in series, parallel, or a combination thereof to form battery modules, and then these modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within a casing. The battery pack may also include other structures; for example, it may include a busbar for electrical connection between the multiple battery cells.

[0075] The battery cell includes at least one of a secondary battery or a primary battery; the battery cell includes, but is not limited to, lithium-sulfur batteries, sodium-ion batteries or magnesium-ion batteries.

[0076] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, the battery's sealing performance also needs to be considered.

[0077] Battery liquid cooling plates, also known as battery heat exchangers, are key components in the thermal management systems of new energy vehicles. They primarily maintain temperature stability within the battery pack, ensuring the battery operates within its optimal temperature range. This improves battery performance, extends lifespan, and reduces the risk of thermal runaway. The liquid cooling plate uses internally circulating coolant to exchange heat with the battery or battery module, removing excess heat. It typically requires lightweight construction, high heat dissipation power, high reliability, precise heat dissipation design, and excellent sealing.

[0078] In some existing technologies, in the thermal runaway exhaust flue structure of the battery module liquid cooling plate, the liquid cooling plate not only cools the battery but also forms a guide flue with the end face of the battery module, which connects to the exhaust channel to discharge thermal runaway ejected materials into the external environment. This design utilizes both the cooling function of the liquid cooling plate and the exhaust function of the exhaust channel, jointly improving the thermal runaway protection capability of the battery pack.

[0079] Existing technology directly fixes the liquid cooling plate to the exhaust port. The separator needs to be set with an avoidance hole to avoid the air inlet. Since the exhaust port and the liquid cooling plate have different shapes, the seal between them is affected. The exhaust can easily pass through the seal and return to the battery cell, causing heat spread and increasing the risk of battery explosion. At the same time, the above-mentioned separator design will waste a lot of separator material.

[0080] In view of this, in order to reduce the amount of material used in the separator and improve the sealing effect of the battery pack, embodiments of this application provide a battery pack, such as... Figures 1-2 As shown, it includes a first beam 11, a cover plate 102, a partition plate 2, and a bottom plate 101.

[0081] The first beam 11 includes a first beam body 211 and a mounting component 112 connected together. The first beam body 211 has an exhaust channel 111. The mounting component 112 is located on one side of the first beam body 211 along the second direction Y. The mounting component 112 is provided with a through air inlet 113, which is connected to the exhaust channel 111. That is to say, the gas at the mounting component 112 can enter the exhaust channel 111 through the air inlet 113 and then be discharged, which can reduce the probability of gas accumulation.

[0082] Understandably, mounting component 112 provides additional mounting points inside the battery pack, facilitating the installation of various components within the battery pack.

[0083] The cover plate 102 is connected to the end of the first beam body 211 opposite to the mounting member 112 along the second direction Y. That is to say, the cover plate 102 is connected to the first beam body 11 and is set opposite to the mounting member 112 along the second direction Y. It can be understood that the cover plate 102, the first beam body 211 and the partition plate 2 can form a frame structure.

[0084] The partition 2 is connected to the mounting component 112. The partition 2, the first beam body 211, and the cover plate 102 enclose the accommodating cavity 4. The accommodating cavity 4 can serve as a space to accommodate components such as batteries. The partition 2 is provided with multiple pressure relief parts 201. The pressure relief parts 201 can be constructed as pressure relief holes. With this configuration, the gas in the accommodating cavity 4 can pass through the partition 2 and leave the accommodating cavity 4 via the pressure relief parts 201, thereby reducing the impact on components such as battery cells in the accommodating cavity 4.

[0085] A gas collection cavity 5 is formed between the bottom plate 101 and the partition plate 2. It can be understood that the partition plate 2, the first beam 11, the bottom plate 101, and the cover plate 102 form two cavities. The clear division of the area inside the battery pack helps to isolate different components inside the battery pack, reduces the probability of mutual interference between different components, and thus helps to improve the sealing and reliability of the battery pack.

[0086] The air inlet 113 is connected to the gas collecting chamber 5, and the bottom plate 101 is connected to the end of the first beam body 211 away from the cover plate 102; the end of the separator 2 near the air inlet 113 along the second direction Y is spaced apart from the air inlet. It can be understood that the separator 2 can be a liquid cooling plate or other plates. When the battery cell requires liquid cooling, the separator 2 is usually set as a liquid cooling plate.

[0087] In the above scheme, the end of the partition 2 near the air inlet 113 along the second direction Y is spaced apart from the air inlet 113. This arrangement eliminates the need to set a separate clearance hole on the partition 2. The spaced arrangement of one end of the partition 2 with the air inlet 113 helps to reduce the overall area of ​​the partition 2, which can reduce the material used in the partition 2, help reduce costs, and improve the overall lightweight effect.

[0088] It is understandable that since the mounting component 112 is provided with an air inlet 113, which is connected to the gas collection chamber 5, this design forms a critical path for gas discharge. This arrangement allows the gas to enter the exhaust channel 111 through the air inlet 113 when the gas collection chamber 5 is full of gas, thereby achieving exhaust. The clear and well-defined exhaust path helps to ensure the smooth exhaust process.

[0089] When an abnormal situation occurs in the battery pack, such as when the pressure of the battery cell 3 is released through the pressure relief section 201, the high-temperature and high-pressure gas enters the gas collection chamber 5 and smoothly enters the air inlet 113, and then is discharged from the battery pack through the exhaust channel 111, preventing the high-temperature and high-pressure gas from accumulating in the gas collection chamber 5 and avoiding damage to the battery pack due to excessive pressure in the gas collection chamber 5.

[0090] In other embodiments, please refer to Figure 2 The battery pack also includes multiple battery cells 3, which are housed in a cavity 4. It is understood that the cavity 4 provides a separate space for each battery cell 3, which helps to isolate the battery cell 3 from other components, thereby improving the safety of the battery cell 3.

[0091] Each battery cell 3 has a second explosion-proof valve 91 facing the partition 2. Along the first direction Z, multiple second explosion-proof valves 91 are arranged opposite to multiple pressure relief parts 201. That is, the second explosion-proof valves 91 and pressure relief parts 201 form a clear and defined pressure relief path. When the battery cell 3 is depressurized, high-temperature and high-pressure gas can be discharged through the second explosion-proof valves 91 and pressure relief parts 201 and enter the gas collection chamber 5, thereby reducing the probability of high-temperature and high-pressure gas affecting other battery cells 3, reducing the occurrence of heat spread, and improving the safety of the battery pack.

[0092] Understandably, when the internal pressure of a single battery cell 3 rises sharply due to abnormal conditions such as internal short circuit, overcharging, or thermal runaway, the second explosion-proof valve 91 will open to promptly discharge the high-temperature and high-pressure gas inside the single battery cell 3. Since the second explosion-proof valve 91 is positioned opposite to the corresponding pressure relief section 201, the discharged high-temperature and high-pressure gas can be directly and quickly released into the gas collection chamber 5 through the pressure relief section 201, preventing the high-pressure gas from accumulating in the accommodating chamber 4 and preventing serious accidents such as explosions caused by excessive internal pressure in the battery pack, thus ensuring the safe operation of the battery pack.

[0093] Mounting member 112 extends along the second direction Y towards the battery cell 3. The separator 2 is connected to the side of mounting member 112 near the bottom plate 101. This arrangement facilitates the connection and layout of the various components inside the battery pack. The mounting member 112 achieves a stable connection between the separator 2 and the first beam body 211, improving the connection stability and facilitating the setting of a sealing structure. This allows the separator 2 to better fulfill its function of separating the accommodating cavity 4 and the gas collecting cavity 5.

[0094] On the other hand, since the end of the partition 2 near the air inlet 113 is spaced apart from the air inlet 113, and the air inlet 113 penetrates through the mounting member 112 in the first direction Z, the sealing structure between the partition 2 and the mounting member 112 will not cause spatial interference with the air inlet 113, thereby helping to improve the sealing effect between the partition 2 and the mounting member 112.

[0095] In a specific embodiment, the two ends of the first beam body 211 along the first direction Z are connected to the cover plate 102 and the bottom plate 101 respectively. That is, along the first direction Z, the cover plate 102, the first beam body 211 and the bottom plate 101 form the main frame structure of the battery pack. This connection method makes the cover plate 102, the bottom plate 101 and the first beam body 11 form a stable whole, which can effectively resist the impact and deformation of external forces, and ensure that the battery pack can maintain good structural integrity under different usage environments and working conditions, and ensure the safety of internal battery cells and other components.

[0096] The first beam body 211 has an exhaust channel 111, and the air inlet 113 penetrates the mounting member 112 along the first direction Z. This design allows the gas generated inside the battery pack to smoothly enter the air inlet 113 and then be discharged through the exhaust channel 111 of the first beam body 211. This clear and efficient gas discharge path greatly improves the exhaust efficiency, reduces the risk of gas accumulation inside the battery pack, and helps to ensure the safety of the battery pack.

[0097] In a specific embodiment, please refer to Figure 4The edge of the partition 2 includes a first end 21 and a protrusion 22. The first end 21 has a gap with the wall of the air inlet 113 along the second direction Y. From the first edge 1131 to the second edge 1132, the protrusion 22 protrudes from the first end 21 along the second direction Y toward the air inlet 113. The partition 2 is fixed to the mounting member 112 by the protrusion 22.

[0098] Understandably, the protrusion 22 can be used to fix the mounting part 112 and the partition 2, which helps to reduce the impact of the mounting and fixing structure of the partition 2 on the seal.

[0099] In the above scheme, the first end 21 is spaced apart from the air inlet 113 along the second direction Y, which reduces the probability of spatial interference between the edge of the partition 2 and the air inlet 113. On the one hand, it ensures that the exhaust channel is unobstructed, that is, it ensures that the exhaust channel and the sealing interface do not intersect. On the other hand, it facilitates the sealing of the installation interface between the partition 2 and the mounting part 112, thereby improving the sealing effect.

[0100] In other embodiments, please refer to Figure 4 The battery pack also has a third direction X perpendicular to the second direction Y. The end of the partition 2 near the air inlet 113 along the second direction Y is the first end 21, which is arranged parallel to the third direction X.

[0101] In the above scheme, the first end 21 of the partition 2 is arranged parallel to the air inlet 113, so that a gap is deliberately reserved between the first end 21 and the air inlet 113. Thus, the wall of the air inlet 113 will not interfere with the edge of the partition 2. On the one hand, it can provide a larger installation area for the seal and improve the sealing effect. On the other hand, it can reduce the material used in the partition 2, which helps to reduce costs and improve the overall lightweight effect.

[0102] When a large amount of gas is generated inside the battery pack for various reasons, this gas can quickly enter the air inlet 113 and then be discharged through the exhaust channel 111, which greatly improves the exhaust efficiency and reduces the risk of pressure increase caused by gas accumulation inside the battery pack, thereby improving the safety of the battery pack.

[0103] In other embodiments, please refer to Figure 5 The battery pack also includes a first seal 6, which abuts against the mounting member 112 and the partition 2. Along the second direction Y, the first end 21 is located between the first seal 6 and the air inlet 113. This arrangement can enhance the sealing effect near the air inlet 113 and reduce the probability of gas flowing back into the accommodating cavity 4.

[0104] Understandably, the first end 21 is located between the first seal 6 and the air inlet 113, which creates a gap between the first seal 6 and the air inlet 113, reducing the probability of spatial interference between the first seal 6 and the air inlet 113, ensuring smooth exhaust, and at the same time providing sufficient arrangement area for the first seal 6, facilitating its arrangement, and helping to reduce the probability of gas leakage from the air inlet 113 between the partition 2 and the mounting part 112, thereby improving the sealing effect between the partition 2 and the mounting part 112.

[0105] In other embodiments, please refer to Figure 6 The battery pack also has a first direction Z that is perpendicular to both the second direction Y and the third direction X. Along the first direction Z, a sealing groove 1141 is provided on the side of the mounting member 112 facing the base plate 101. It can be understood that the sealing groove 1141 can serve to accommodate the first sealing member 6 on the mounting member 112.

[0106] The sealing groove 1141 extends along the third direction X, and the battery pack also includes a first seal 6, which is disposed in the sealing groove 1141 and abuts against the mounting member 112 and the partition 2 along the first direction Z to seal the mounting member 112 and the partition 2.

[0107] In the above scheme, the first sealing element 6 is sealed in the sealing groove 1141, which improves the sealing effect between the mounting part 112 and the partition 2. It can be understood that the gap between the partition 2 and the air inlet 113 can reduce the bending of the first sealing element 6 compared with the structure of the partition 2 with the avoidance hole, and can increase the sealing points, so as to make the sealing effect better and help improve the sealing effect between the sealing groove 1141 and the first sealing element 6.

[0108] The first seal 6 and the air inlet 113 are spaced apart along the second direction Y.

[0109] In other embodiments, please refer to Figure 6 and Figure 7 The battery pack also includes multiple locking members 7 spaced apart along the third direction X. The separator 2 is connected to the mounting member 112 through the locking members 7. This arrangement ensures a stable connection between the separator 2 and the mounting member 112. Furthermore, the multiple locking members 7 spaced apart along the third direction X increase the number of connection points, improving the connection stability between the separator 2 and the mounting member 112. Compared to a single or a few connection points, this arrangement can better withstand the stress generated by the battery pack under different operating conditions, such as vibrations during vehicle operation, and impacts during acceleration and deceleration. This reduces the risk of loosening, wear, or even damage to components due to poor connections.

[0110] In addition, the spaced locking elements 7 can make the force between the separator 2 and the mounting element 112 more uniform. When the battery pack is subjected to external force, these locking elements 7 can distribute the force to different locations, avoid excessive local stress, thereby improving the reliability and durability of the entire structure and extending the service life of the battery pack.

[0111] The first sealing element 6 is provided with a plurality of sub-recesses 1146, which are spaced apart along the third direction X. The sub-recesses 1146 and the locking element 7 are spaced apart along the second direction Y. That is, the sub-recesses 1146 and the locking element 7 are spaced apart, which reduces the probability of spatial interference between the first sealing element 6 and the locking element 7, ensures that the locking element 7 has sufficient arrangement area, facilitates the arrangement of the locking element 7, and helps to ensure the sealing effect of the first sealing element 6, reducing the probability of gas leakage between the partition 2 and the mounting element 112, thereby helping to improve the sealing effect between the partition 2 and the mounting element 112.

[0112] In other embodiments, please refer to Figure 8 The battery pack also includes a protective cover 212, which is connected to the first beam body 211 along the second direction Y on the side opposite to the mounting member 112. The protective cover 212 has an exhaust chamber 212a. This arrangement allows the gas to flow along the designed path, thereby releasing the high-temperature and high-pressure gas generated inside the battery pack through the exhaust chamber, preventing damage to the battery pack from the high-temperature and high-pressure gas inside, extending the service life of the battery pack, and improving its safety and stability.

[0113] The exhaust channel 111 has an outlet 211a, which is located on the side of the first beam 11 away from the mounting member 112. The outlet 211a is connected to the exhaust chamber 212a. This arrangement allows gas to be smoothly discharged from the exhaust chamber 212a to the outside of the battery pack, forming a complete exhaust channel and ensuring the smoothness of the exhaust process.

[0114] In other words, a dedicated exhaust channel is formed inside the battery pack, allowing gas to flow rapidly within it. This design reduces the residence time of gas inside the battery pack, improves exhaust efficiency, and promptly removes harmful or excess gases generated within the battery pack, thereby enhancing the safety of the battery pack.

[0115] In other embodiments, please refer to Figure 8 , Figure 9 and Figure 10 The first beam 11 also includes an exhaust seat 115. The mounting member 112 is located on the side of the first beam body 211 close to the mounting member 112 and is connected to the mounting member 112. The exhaust seat 115 has a mounting surface 1113, which is inclined to the plane containing the second direction Y and the first direction Z.

[0116] The battery pack also includes a smoke sensor 8, which includes a connected sensing part 8a and a main body 8b. The sensing part 8a is disposed on the mounting surface 1113 and located in the exhaust channel 111.

[0117] In the above scheme, the smoke sensor 8 is set on the inclined mounting surface 1113, which reduces the spatial interference of the first beam 11 during the installation of the smoke sensor 8. The smoke sensor 8 can be installed on the mounting surface 1113 more conveniently, and the operation redundancy of the staff is better, which improves the convenience of installing the smoke sensor 8.

[0118] Understandably, the smoke sensor 8 serves to detect smoke in the exhaust channel 111. During battery use, thermal runaway may occur due to internal short circuits, overcharging, overheating, or other reasons. Smoke is often generated during thermal runaway. One end of the smoke sensor 8 extends into the exhaust channel 111, enabling it to detect smoke within the exhaust channel 111 immediately. Once smoke is detected, the sensor can quickly issue an alarm signal, alerting relevant personnel to take measures to prevent further deterioration of the thermal runaway, reduce the probability of serious accidents such as battery pack fires and explosions, and ensure the safety of personnel and equipment.

[0119] In other embodiments, please refer to Figure 1 The battery pack also includes a second beam 200, and there are two second beams 200. The two second beams 200 are arranged opposite each other along a third direction X. The first beam 11 is connected to the two second beams 200 at the same end on the same side in the second direction Y.

[0120] Understandably, the two second beams 200, which are positioned opposite each other along the third direction X, are connected to the first beam 11 to form a frame-like structure. This frame structure can effectively disperse various external forces, such as vibration, impact, and compression, that the battery pack experiences during use. During vehicle operation, the battery pack is constantly subjected to bumps and vibrations from the road surface. This frame structure can evenly distribute these external forces to each beam, avoiding local stress concentration that could lead to structural damage. This enhances the overall rigidity and strength of the battery pack and improves the stability and reliability of the structure.

[0121] In other embodiments, please refer to Figure 1 The battery pack also includes a first explosion-proof valve 9, which is connected to the first beam 11. The first explosion-proof valve 9 seals the exhaust channel 111. This configuration can prevent external debris from entering the exhaust channel 111 and ensure that the exhaust channel 111 is connected to the outside when the pressure is released.

[0122] Understandably, the first explosion-proof valve 9 can play a role in pressure relief. During the charging and discharging process of the battery, especially under abnormal conditions (such as short circuit, thermal runaway, etc.), a large amount of high temperature and high pressure gas will be rapidly generated inside, causing the pressure inside the battery pack to rise sharply. When the pressure inside the battery pack exceeds the set threshold of the first explosion-proof valve, the explosion-proof valve will automatically open to release gas and reduce pressure, preventing the battery pack from exploding due to excessive internal pressure, and effectively protecting the safety of personnel and equipment.

[0123] In other embodiments, please refer to Figure 1 and Figure 2 The battery pack also includes multiple battery cells 3, which are housed in a cavity 4. In other words, the cavity 4 can provide a relatively independent and stable space for the battery cells 3, reducing the impact of external environmental factors (such as dust, moisture, mechanical impact, etc.) on the battery cells 3. This arrangement facilitates unified management and protection of the battery cells 3.

[0124] In another embodiment, this application provides an electrical device including the battery pack of any of the above embodiments. Because the electrical device of this application has the aforementioned battery pack, the safety of the electrical device is improved.

[0125] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0126] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0127] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0128] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having a second direction (Y), characterized in that, include: The first beam body (11) includes a first beam body (211) and a mounting component (112) connected together. The first beam body (211) has an exhaust channel (111). The mounting component (112) is located on one side of the first beam body (211) along the second direction (Y). The mounting component (112) is provided with a through air inlet (113), and the air inlet (113) is connected to the exhaust channel (111). The cover plate (102) is connected to the end of the first beam body (211) away from the mounting member (112); A partition (2) is connected to the mounting component (112). The partition (2), the first beam body (211), and the cover plate (102) form a receiving cavity (4). The partition (2) is provided with a plurality of pressure relief parts (201). The bottom plate (101) forms an air collection cavity (5) with the partition plate (2), and the air collection cavity (5) is connected to the air inlet (113); the bottom plate (101) is connected to the end of the first beam body (211) away from the cover plate (102); The partition (2) is spaced apart from the air inlet (113) at the end of the partition (2) along the second direction (Y) near the air inlet (113).

2. The battery pack according to claim 1, characterized in that, The battery pack also includes a plurality of battery cells (3), which are disposed within the accommodating cavity (4); The battery cell (3) has a second explosion-proof valve (91) facing the partition (12). A plurality of second explosion-proof valves (91) are arranged opposite to a plurality of pressure relief parts (201). The mounting member (112) extends along the second direction (Y) toward the battery cell (3). The partition (2) is connected to the mounting member (112) on the side near the base plate (101).

3. The battery pack according to claim 1, characterized in that, The battery pack also has a third direction (X) perpendicular to the second direction (Y), and the end of the partition (2) near the air inlet (113) along the second direction (Y) is a first end (21), which is arranged parallel to the third direction (X).

4. The battery pack according to claim 3, characterized in that, The battery pack also includes a first seal (6) that abuts against the mounting member (112) and the partition (2), and the first end (21) is located between the first seal (6) and the air inlet (113) along the second direction (Y).

5. The battery pack according to claim 4, characterized in that, The battery pack also has a first direction (Z) that is perpendicular to both the second direction (Y) and the third direction (X). Along the first direction (Z), the mounting member (112) has a sealing groove (1141) on the side facing the base plate (101). The sealing groove (1141) extends along the third direction (X). The first sealing member (6) is disposed in the sealing groove (1141) and abuts against the mounting member (112) and the partition plate (2) along the first direction (Z).

6. The battery pack according to claim 4, characterized in that, The battery pack also includes a plurality of locking members (7) spaced apart along the third direction (X). The partition (2) is connected to the mounting member (112) through the locking members (7). The first sealing member (6) is provided with a plurality of sub-recesses (1146). The plurality of sub-recesses (1146) are spaced apart along the third direction (X). The sub-recesses (1146) and the locking members (7) are spaced apart along the second direction (Y).

7. The battery pack according to claim 1, characterized in that, The battery pack also includes a protective cover (212), which is connected to the side of the first beam body (211) opposite to the mounting member (112) along the second direction (Y), and the protective cover (212) has an exhaust chamber (212a); The exhaust channel (111) has an air outlet (211a), which is located on the side of the first beam (11) away from the mounting member (112), and the air outlet (211a) is connected to the exhaust chamber (212a).

8. The battery pack according to claim 7, characterized in that, The battery pack also has a first direction (Z) perpendicular to the second direction (Y). The first beam (11) also includes an exhaust seat (115), which is located on the side of the first beam body (211) near the mounting member (112) and connected to the mounting member (112). The exhaust seat (115) has a mounting surface (1113) which is inclined to the plane containing the second direction (Y) and the first direction (Z). The battery pack also includes a smoke sensor (8), which includes a sensing part (8a) and a body part (8b) connected together. The sensing part (8a) passes through the mounting surface (1113) and is located in the exhaust channel (111).

9. The battery pack according to claim 1, characterized in that, The battery pack also includes a first explosion-proof valve (9), which is connected to the first beam body (211) and seals the exhaust channel (111).

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

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