Battery device and electric appliance

Abstract

The application discloses a battery device and a power utilization equipment. The battery device comprises a battery box, a battery monomer, an explosion-proof valve and an air duct auxiliary part. The battery box comprises a box body and a box cover, and the box body and the box cover are arranged in a closed mode to form a containing cavity. The box body is provided with a first air duct. The battery monomer is arranged in the containing cavity. The explosion-proof valve is arranged on the box body. The air duct auxiliary part is arranged between the box body and the battery monomer. The air duct auxiliary part is provided with a second air duct. The second air duct is in communication with the first air duct and is arranged as a pressure relief exhaust passage. The pressure relief exhaust passage is in communication with the containing cavity and the explosion-proof valve. The technical scheme of the application can effectively perform pressure relief and exhaust on the inside of the battery device when the battery device is in thermal runaway, thereby reducing the risk of deformation and rupture of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery device technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] When a battery device experiences thermal runaway during use, the individual battery cells inside the device release a large amount of gas, causing a sharp increase in internal gas pressure and potentially leading to deformation or rupture of the battery device. Utility Model Content

[0003] The main objective of this application is to provide a battery device that can effectively depressurize and vent air inside the battery device when thermal runaway occurs, thereby reducing the possibility of deformation and rupture of the battery device.

[0004] To achieve the above objectives, the battery device proposed in this application includes:

[0005] A battery box, the battery box including a box body and a box cover, the box body and the box cover being configured to enclose a receiving cavity, the box body being provided with a first air passage;

[0006] A battery cell, wherein the battery cell is disposed in the accommodating cavity;

[0007] An explosion-proof valve, wherein the explosion-proof valve is disposed in the enclosure; and

[0008] An air passage auxiliary component is disposed between the housing and the battery cell. The air passage auxiliary component has a second air passage, which is connected to the first air passage to form a pressure-reducing exhaust channel. The pressure-reducing exhaust channel is connected to the accommodating cavity and the explosion-proof valve.

[0009] The battery device in this application utilizes the battery box housing to provide a first air duct. An auxiliary air duct component is also provided between the housing and the individual battery cells. A second air duct is constructed using this auxiliary component, and the second air duct connects to the first air duct to form a pressure-reducing exhaust channel. Since this pressure-reducing exhaust channel is distributed across the housing and the auxiliary air duct component, it has a relatively long path. Therefore, in the event of thermal runaway, the large amount of gas generated by the individual battery cells within the battery box can be effectively reduced and exhausted through this long-path pressure-reducing exhaust channel, and finally discharged to the outside via an explosion-proof valve, thus reducing the possibility of a rapid and excessive increase in internal pressure. Furthermore, the auxiliary air duct component in this solution is located between the housing and the individual battery cells, minimizing its impact on the installation space of the battery cells. This allows for the arrangement of a pressure-reducing exhaust channel with a long path to meet the pressure-reducing exhaust requirements within the limited volume and space of the battery box, thereby reducing the risk of deformation and rupture of the battery device.

[0010] In some embodiments, the housing includes:

[0011] The bottom plate of the box is provided at a relative interval from the lid of the box; and

[0012] A side panel of the box, which is connected to the bottom plate of the box and is configured to enclose the receiving cavity together with the bottom plate of the box and the box cover;

[0013] The explosion-proof valve and the first air passage are located on the side plate of the box, and the air passage auxiliary component is located between the side plate of the box and the battery cell.

[0014] This allows for easy connection between the formed pressure relief and exhaust channels and the explosion-proof valve. Simultaneously, space can be reserved within the bottom plate of the enclosure to accommodate liquid cooling channels with a large cooling area for the battery cells located within the housing cavity, improving the cooling effect on the battery cells. Furthermore, when the venting auxiliary components are positioned between the side plate of the enclosure and the battery cells, the space between the battery cells and the side plate can be fully utilized, further reducing the space occupied by the venting auxiliary components on the battery cell installation.

[0015] In some embodiments, the side panel of the enclosure includes a first side panel, a second side panel, and a third side panel, and the explosion-proof valve is embedded in the first side panel;

[0016] The battery device further includes a low-pressure sampling module, which is embedded in the second side plate. At least a portion of the air passage auxiliary component is disposed between the second side plate and the battery cell, and the first air passage is disposed in the third side plate.

[0017] Therefore, embedding the low-pressure sampling module on the second side plate reduces the space occupied by the low-pressure sampling module within the battery compartment. Furthermore, by placing at least a portion of the air duct auxiliary component between the second side plate and the battery cell, a compensating air duct can be formed when a continuous, closed first air duct cannot be provided on the second side plate. This allows the air duct auxiliary component on the corresponding second side plate to ultimately achieve a longer path for the pressure relief and exhaust channel, thus meeting the pressure relief and exhaust requirements.

[0018] In some embodiments, the first side plate and the third side plate are spaced apart from each other in a first direction, and there are two second side plates, which are spaced apart from each other in a second direction, the second direction intersecting the first direction;

[0019] The airway auxiliary component includes a first section and a second section. The first section is disposed between a second side plate and the battery cell, and the second section is disposed between another second side plate and the battery cell.

[0020] The second airway includes a first channel and a second channel. The first channel is located in the first segment and connects to the accommodating cavity and the first airway. The second channel is located in the second segment and connects to the first airway and the explosion-proof valve.

[0021] Therefore, when both second side plates are embedded with low-pressure sampling modules, the corresponding first and second sections can be used to compensate for the formation, so as to better realize that the pressure relief and exhaust channel can have a longer path to meet the pressure relief and exhaust requirements.

[0022] In some embodiments, the airway auxiliary component further includes a third section body disposed between the third side plate and the battery cell;

[0023] The first airway also includes a third channel, which is located in the third segment and connects to the first channel, the first airway and the second channel.

[0024] Therefore, the path of the pressure relief and exhaust channel can be further extended to improve the pressure relief and exhaust effect on the battery device; at the same time, it can also make the air passage auxiliary component have a larger corresponding area with the third side plate, which will help improve the convenience of connecting the second air passage in the air passage auxiliary component with the first air passage in the third side plate.

[0025] In some embodiments, the third channel is provided with a first separator to divide the third channel into a first sub-channel and a second sub-channel that both extend along a second direction and are arranged side by side;

[0026] One end of the first sub-channel is connected to the first channel, and the other end is isolated from the second channel and connected to the first airway;

[0027] One end of the second sub-channel is isolated from the first channel and connected to the first airway, while the other end is connected to the second channel.

[0028] Therefore, the space within the third section and the third side plate can be fully utilized to extend the gas flow path and further extend the path of the pressure relief and exhaust channel, thereby improving the pressure relief and exhaust effect on the battery device.

[0029] In some embodiments, the first separator includes:

[0030] A first partition, which extends along the second direction;

[0031] A second partition plate is connected to the end of the first partition plate near the second segment and extends toward a third direction, the third direction intersecting the first direction and the second direction; and

[0032] The third partition is connected to one end of the second partition near the first segment and extends toward the other side upwards towards the third segment.

[0033] Therefore, the first sub-channel and the second sub-channel, which are arranged side by side in the third direction, can be separated, so that both the first sub-channel and the second sub-channel can correspond well with the third side plate, thereby improving the convenience of connecting the first sub-channel and the second sub-channel with the first airway.

[0034] In some embodiments, a first through hole and a second through hole are provided on the side of the third segment facing the third side plate. The first through hole is located at one end of the third segment near the second segment and communicates with the first sub-channel. The second through hole is located at one end of the third segment near the first segment and communicates with the second sub-channel.

[0035] The third side plate is provided with a third through hole and a fourth through hole, which are connected to the first air passage. The third through hole is connected to the first through hole, and the fourth through hole is connected to the second through hole.

[0036] Therefore, the first and second sub-channels can be connected to the first air passage without the need for additional connecting parts, which helps to simplify the number of components in the battery device. At the same time, it also allows the third segment and the third side plate to be fitted together, improving their compact distribution and reducing the space occupied by the third segment on the battery cells.

[0037] In some embodiments, the third segment body has a first through hole and a second through hole on the side facing the third side plate, and the first through hole and the second through hole are connected to the third channel;

[0038] The third side plate is provided with a third through hole and a fourth through hole, which are connected to the first air passage. The third through hole is connected to the first through hole, and the fourth through hole is connected to the second through hole.

[0039] Therefore, the first and second sub-channels can be connected to the first air passage without the need for additional connecting parts, which helps to simplify the number of components in the battery device. At the same time, it also allows the third segment and the third side plate to be fitted together, improving their compact distribution and reducing the space occupied by the third segment on the battery cells.

[0040] In some embodiments, the first airway is provided with a second partition to divide the first airway into at least two sub-airways, the at least two sub-airways being arranged side by side and connected in series.

[0041] In the arrangement direction of the at least two sub-air passages, one of the two sub-air passages located at both ends is connected to the third through hole, and the other is connected to the fourth through hole.

[0042] Therefore, it can guide the gas generated by thermal runaway of the battery device when it enters the first air passage, so as to form an S-shaped reciprocating flow path, thereby further extending the gas flow path and the path of the pressure relief and exhaust channel, and improving the pressure relief and exhaust effect of the battery device.

[0043] In some embodiments, the at least two sub-airways extend along the second direction and are arranged side by side in a third direction, the third direction intersecting the first direction and the second direction.

[0044] This reduces the number of sub-partitions in the second separator, thereby improving the ease of processing and forming the third side plate.

[0045] In some embodiments, the second separator includes a plurality of sub-septa, the plurality of sub-septa being arranged side-by-side at intervals to divide the first airway into a plurality of the sub-airways.

[0046] This allows the first air passage to be divided into more sub-passes, which in turn helps to further extend the path of the pressure-reducing exhaust passage and improve the pressure-reducing exhaust effect on the battery device. At the same time, it also simplifies the structure of the second separator, making it easier to process and shape the third side plate.

[0047] In some embodiments, the third segment is an integral structure with the first segment and the second segment.

[0048] This simplifies the number of components and improves the ease of installation and arrangement of airway accessories. It also helps to improve the overall strength and sealing effect of the airway accessories.

[0049] In some embodiments, the airway auxiliary component further includes a fourth section, which is disposed between the first side plate and the battery cell and corresponds to the explosion-proof valve;

[0050] The first air passage also includes a fourth channel, which is located in the fourth segment and connected to the second channel and the explosion-proof valve.

[0051] Therefore, the connection between the air passage auxiliary component and the explosion-proof valve can be improved by the correspondence between the fourth section and the explosion-proof valve; at the same time, the path of the pressure-reducing and exhaust channel can be further extended to improve the pressure-reducing and exhaust effect on the battery device.

[0052] In some embodiments, a mounting hole is provided on the side of the fourth segment facing the first side plate, and the mounting hole communicates with the fourth channel;

[0053] Part of the explosion-proof valve passes through the mounting hole and communicates with the fourth channel.

[0054] This allows the air inlet of the explosion-proof valve to directly connect to the fourth channel without the need for an additional connecting component, thus improving the ease of connection between the air duct auxiliary components and the explosion-proof valve. Simultaneously, it also improves the compactness of the distribution between the air duct auxiliary components and the explosion-proof valve, reducing the space occupied by the air duct auxiliary components in the installation of individual battery cells.

[0055] In some embodiments, the fourth segment extends along the second direction, with one end connected to the second segment and the other end spaced apart from the first segment, and the fourth channel extends along the extension direction of the fourth segment.

[0056] This allows the extended shape of the fourth segment to match the extended shape of the inner fourth channel, both being relatively regular, which improves the ease of processing and shaping the fourth segment. Simultaneously, it enhances the ease of communication between the fourth and second channels and ensures a more concentrated correspondence between the fourth segment and the explosion-proof valve, preventing excessively long, ineffective lengths.

[0057] In some embodiments, the fourth segment and the second segment are an integral structure.

[0058] This simplifies the number of components and improves the ease of installation and arrangement of airway accessories. It also helps to improve the overall strength and sealing effect of the airway accessories.

[0059] In some embodiments, the end of the first segment near the first side plate is provided as an opening to be configured as the air inlet of the pressure relief exhaust channel, the air inlet being connected to the receiving cavity.

[0060] This eliminates the need for an additional opening on the first section to form an air intake, thereby simplifying the structure of the first section and improving the ease of its processing and shaping.

[0061] In some embodiments, the first segment extends along the first direction, and the first channel extends along the extension direction of the first segment.

[0062] This allows the extended shape of the first segment to be consistent with the extended shape of the first channel on the inside, both being relatively regular, which helps to improve the convenience of processing and forming the first segment.

[0063] In some embodiments, the second segment extends along the first direction, and the second channel extends along the extension direction of the first segment.

[0064] This allows the extended shape of the second segment to be consistent with the extended shape of the inner second channel, both being relatively regular, which helps to improve the convenience of processing and forming the second segment.

[0065] In some embodiments, the third side plate is open at both ends in the second direction, and the two second side plates respectively cover the openings at both ends of the third side plate.

[0066] This facilitates the fabrication of a second partition inside the third side panel.

[0067] In some embodiments, in a cross section perpendicular to the extending direction of the air passage auxiliary component, the dimension of the air passage auxiliary component in the arrangement direction of the battery cell and the side panel of the box is defined as L1, and the cross section in the arrangement direction of the bottom plate of the box and the cover of the box is defined as L2, satisfying the relationship: L2 > L1.

[0068] This allows the air passage auxiliary components to form a flat structure, which helps to make full use of the space in the vertical direction and reduce the space occupied by the air passage auxiliary components in the horizontal direction for the installation of battery cells.

[0069] In some embodiments, the airway accessory is recessed into a clearance groove at a position corresponding to the low-pressure sampling module, and a portion of the low-pressure sampling module is accommodated in the clearance groove.

[0070] This allows the airway auxiliary component to better adapt to the shape between the battery cell and the side plate in the housing where the low-pressure sampling module is installed.

[0071] In some embodiments, the number of battery cells is multiple, and at least some of the battery cells are stacked along the thickness direction of the battery cells to form a battery pack;

[0072] The stacking direction of the plurality of battery cells in the battery pack is defined as a first direction, and the second side plate is located on one side of a second direction of the battery device, the second direction intersecting the first direction.

[0073] This allows the low-voltage sampling module to be placed on one or both sides of the battery device in the width direction, which reduces the space occupied by the low-voltage sampling module in the length direction of the battery device. This allows the battery device to stack more battery cells in its length direction, thereby increasing the number of battery cells and improving the energy density of the battery device.

[0074] In some embodiments, the cross-sectional area of ​​the second airway is defined as S, satisfying the relationship: 100mm 2 ≤S≤2000mm 2 .

[0075] Therefore, it is possible to achieve a good balance between the pressure reduction and venting effect of the battery device and the compactness of the battery device's structural distribution.

[0076] This application also proposes an electrical device including the aforementioned battery device. Attached Figure Description

[0077] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0078] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application;

[0079] Figure 2 This is a schematic diagram of the structure of an embodiment of the battery device of this application;

[0080] Figure 3 for Figure 2 A top view of the battery assembly without the cover;

[0081] Figure 4 for Figure 3 A schematic diagram of the assembly structure of the battery pack housing and air duct auxiliary components;

[0082] Figure 5 for Figure 4 An exploded structural diagram of the middle housing and airway auxiliary components;

[0083] Figure 6 for Figure 4 A cross-sectional schematic diagram of the middle housing and airway auxiliary components;

[0084] Figure 7 for Figure 5 A schematic diagram of the airway auxiliary components in the middle;

[0085] Figure 8 for Figure 7 A cross-sectional view at point A-A;

[0086] Figure 9 for Figure 4 Another cross-sectional view;

[0087] Figure 10 for Figure 3 A partial cross-sectional schematic diagram.

[0088] Explanation of icon numbers:

[0089] 100. Battery assembly; 10. Battery box; 11. Box body; 111. Box bottom plate; 112. Box side plate; 113. First side plate; 114. Second side plate; 115. Third side plate; 115a. First air passage; 115a1. Sub-air passage; 115b. Third through hole; 115c. Fourth through hole; 1151. Second separator; 1152. Sub-separator; 13. Box cover; 10a. Receiving cavity; 20. Battery cell; 20A. Battery pack; 30. Explosion-proof valve; 40. Air passage auxiliary component; 40a. Second air passage; 40a1. First channel; 40a2. Second channel; 4 0a3, Third Channel; 40a31, First Sub-channel; 40a32, Second Sub-channel; 40a4, Fourth Channel; 41, First Section; 41a, Air Inlet; 43, Second Section; 45, Third Section; 451, First Divider; 4511, First Baffle; 4512, Second Baffle; 4513, Third Baffle; 45a, First Through Hole; 45b, Second Through Hole; 47, Fourth Section; 47a, Mounting Hole; 40b, Clearance Groove; 50, Pressure Reduction Exhaust Channel; 60, Low-Pressure Sampling Module; 1000, Vehicle; 200, Controller; 300, Motor.

[0090] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0091] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0092] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0093] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0094] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0095] Battery devices, which are devices used to store electrical energy, are widely used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, electric cars, rail trains and other fields.

[0096] The battery device may include a battery case and individual battery cells disposed within the battery case. The battery case may include a casing and a cover that fits over the casing to enclose a cavity for housing the individual battery cells. The individual battery cell is the smallest unit comprising the battery and typically includes a battery casing and an electrode assembly disposed within the battery casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. The individual battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Furthermore, the individual battery cell may be cylindrical, flat, cuboid, or other shapes. In addition, the battery case may contain multiple individual battery cells, which may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0097] Furthermore, during the use of the battery device, thermal runaway may occur. In this case, the individual battery cells inside the device will release a large amount of gas, causing a sharp increase in the internal gas pressure of the battery device, which may lead to risks such as deformation and rupture of the battery device.

[0098] Therefore, some battery devices in related technologies have pressure-reducing and venting channels on the battery box to release pressure and exhaust air in the event of thermal runaway. However, due to the limited volume and space of the battery box itself, and the need to install and hang some devices on the box walls, the arrangement of pressure-reducing and venting channels is very limited, making it difficult to meet the pressure-reducing and venting requirements.

[0099] Therefore, based on the above considerations, in order to solve the problem that it is difficult to arrange a pressure-reducing and venting channel in the battery device in the related technology to meet the pressure reduction and venting requirements, which causes the internal air pressure of the battery device to increase sharply when thermal runaway occurs, leading to the risk of deformation and rupture of the battery device, this application proposes a novel battery device. This battery device innovatively provides a first air channel on the battery box body, and further provides an air channel auxiliary component between the box body and the battery cell. The air channel auxiliary component is used to set up a second air channel, and then the second air channel is connected to the first air channel to form a pressure-reducing and venting channel with sufficient path to meet the pressure reduction and venting requirements, so as to achieve effective pressure reduction and venting inside the battery device when thermal runaway occurs.

[0100] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices to provide power to them. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, and spacecraft. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0101] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device according to an embodiment of this application.

[0102] Please refer to Figure 1In one embodiment of this application, the vehicle 1000 can be a rail train, a fuel-powered vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is internally installed in the vehicle 1000, and the battery device 100 can be located at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and operation.

[0103] In one embodiment of this application, the battery device 100 can also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000, and can also be used to supply power to electrical appliances on the vehicle 1000.

[0104] Please refer to the reference. Figures 2 to 6 In one embodiment of this application, the battery device 100 includes a battery box 10, a battery cell 20, an explosion-proof valve 30, and an air passage auxiliary component 40. The battery box 10 includes a box body 11 and a box cover 13, which are configured to enclose a cavity 10a. The box body 11 is provided with a first air passage 115a. The battery cell 20 is disposed in the cavity 10a. The explosion-proof valve 30 is disposed in the box body 11. The air passage auxiliary component 40 is disposed between the box body 11 and the battery cell 20. The air passage auxiliary component 40 is provided with a second air passage 40a, which is connected to the first air passage 115a to form a pressure-reducing exhaust channel 50. The pressure-reducing exhaust channel 50 is connected to the cavity 10a and the explosion-proof valve 30.

[0105] The battery box 10, through the enclosure 10a formed by the box body 11 and the box cover 13, provides space for the battery cells 20, thus supporting and protecting them. The box body 11 can be a hollow structure with an opening on one side to house and support the battery cells 20 located within the enclosure 10a. The box cover 13 can also be a hollow structure with an opening on one side, or it can be a plate structure, ensuring that after closing the opening of the box body 11, it together with the box body 11 encloses the enclosure 10a. Furthermore, the battery box 10 formed by the box body 11 and the box cover 13 can be a cuboid, cube, or cylinder; this application does not limit the shape of the battery box 10. The shape of the enclosure 10a located within the battery box 10 can be adapted to the outer shape of the battery box 10, for example, it can be entirely rectangular. Of course, the shape of the enclosure 10a can also be different from the outer shape of the battery box 10. Furthermore, the connection between the housing 11 and the cover 13 can be a detachable connection, such as a threaded connection using screws or bolts, a snap-fit ​​connection, or a magnetic connection. Alternatively, the housing 11 and the cover 13 can be a non-detachable connection, such as an adhesive connection or a welded connection. Additionally, the first vent 115a on the housing 11 can be used to exhaust gases generated by thermal runaway in the battery device 100. The first vent 115a can be located on the side panel 112 of the housing 11, as described below, or it can be located on the bottom panel 111 of the housing 11, or it can be distributed on both the side panel 112 and the bottom panel 111. When the first vent 115a is distributed on both the side panel 112 and the bottom panel 111, the first vent 115a on the side panel 112 and the bottom panel 111 can be directly connected, or they can be indirectly connected through the vent auxiliary component 40. Furthermore, the first airway 115a can be arranged in a linear extension, a zigzag extension, or an arc extension, etc. The cross-sectional shape of the first airway 115a perpendicular to its extension direction can be rectangular, elliptical, etc.

[0106] The battery cell 20 can be used to store electrical energy. The number of battery cells 20 can be one, or multiple. Multiple battery cells 20 can be connected in series, parallel, or a combination thereof; a combination means that multiple battery cells 20 are connected in both series and parallel. Therefore, the battery device 100 may also include other structures, such as a busbar, for electrical connection between at least two battery cells 20. When there are multiple battery cells 20, at least some of the battery cells 20 can be stacked in one direction to form a battery pack 20A. The battery device 100 may include only one battery pack 20A, or it may include two or more battery packs 20A, in which case the battery packs 20A can be arranged side-by-side. Furthermore, the battery cell 20 can be a secondary battery or a primary battery. A secondary battery is a battery that can be recharged after discharge to activate the active materials and continue to be used. Further, the battery cell 20 can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. In addition, the battery cell 20 can be cylindrical, flat, cuboid or other shapes.

[0107] An explosion-proof valve 30 can be installed on the housing 11 of the battery box 10 so that when the battery device 100 experiences thermal runaway and generates a large amount of gas, the explosion-proof valve 30 can be used to vent and relieve pressure. The number of explosion-proof valves 30 can be one, or two or more. When there are two or more explosion-proof valves 30, each explosion-proof valve 30 can be located on the same side of the housing 11, distributed on different sides of the housing 11, or partially on the same side and partially on opposite sides.

[0108] The air passage auxiliary component 40 can be used to form a second air passage 40a, which communicates with the first air passage 115a to form a pressure-reducing exhaust passage 50 of the battery device 100. The pressure-reducing exhaust passage 50 can communicate with the receiving cavity 10a via the first air passage 115a, or it can communicate with the receiving cavity 10a via the second air passage 40a. Similarly, the pressure-reducing exhaust passage 50 can communicate with the explosion-proof valve 30 via the first air passage 115a, or it can communicate with the explosion-proof valve 30 via the second air passage 40a. When the pressure-reducing exhaust passage 50 communicates with both the receiving cavity 10a and the explosion-proof valve via the first air passage 115a, the second air passage 40a can be used to connect at least two sections of the first air passage 115a. Similarly, when the pressure-reducing exhaust passage 50 communicates with both the receiving cavity 10a and the explosion-proof valve via the second air passage 40a, the first air passage 115a can be used to connect at least two sections of the second air passage 40a. Furthermore, the air duct auxiliary component 40 can be disposed between the side panel 112 of the battery box 10 and the battery cell 20 as described below, or it can be disposed between the bottom panel 111 of the battery box 10 and the battery cell 20, or it can be disposed simultaneously between the side panel 112 and the battery cell 20, and between the bottom panel 111 and the battery cell 20. In addition, the air duct auxiliary component 40 can be linearly extended, or it can be zigzag extended, or it can be arc extended, etc. This application does not limit the shape of the air duct auxiliary component 40. Furthermore, the air duct auxiliary component 40 can be a one-piece structure, or it can be a split structure comprising at least two parts. A one-piece structure refers to an object manufactured using a one-piece molding process (e.g., one-piece extrusion molding, one-piece casting molding, or one-piece injection molding, etc.), so that the object is a single unit upon completion. A split structure refers to an object being divided into multiple parts and manufactured independently. Furthermore, the second air duct 40a can be linearly extended, or it can be zigzag extended, or it can be arc extended, etc. The second airway 40a, in its cross-section perpendicular to its extension direction, can have a rectangular or elliptical cross-section, among other shapes. Furthermore, the extension shape of the second airway 40a can be the same as that of the airway auxiliary component 40, for example, both being linearly extended, or they can be different. Similarly, the cross-sectional shape of the second airway 40a can be the same as the external shape of the airway auxiliary component 40, for example, both being rectangular, or they can be different.

[0109] The battery device 100 in this application utilizes the housing 11 of the battery box 10 to provide a first air duct 115a. Simultaneously, an air duct auxiliary component 40 is provided between the housing 11 and the battery cell 20. A second air duct 40a is provided using this air duct auxiliary component 40, and the second air duct 40a is connected to the first air duct 115a to form a pressure-reducing exhaust channel 50. Since the pressure-reducing exhaust channel 50 is distributed on the housing 11 and the air duct auxiliary component 40, it has a relatively long path. Therefore, in the event of thermal runaway in the battery device 100, the large amount of gas generated by the battery cell 20 inside the battery box 10 can be effectively depressurized and exhausted through the pressure-reducing exhaust channel 50 with its long path, and finally safely discharged to the outside via the explosion-proof valve 30, thereby reducing the possibility of a rapid and excessive increase in internal pressure of the battery device 100. Moreover, the air passage auxiliary component 40 in this solution is located between the housing 11 and the battery cell 20, which can minimize its occupation of the installation space of the battery cell 20. This allows for the arrangement of a pressure relief and exhaust passage 50 with a longer path to meet the pressure relief and exhaust requirements within the limited volume and space of the battery housing 10, thereby reducing the possibility of deformation and rupture of the battery device 100.

[0110] Please refer to the reference. Figures 2 to 5 In one embodiment of this application, the housing 11 includes a bottom plate 111 and a side plate 112. The bottom plate 111 and the cover 13 are arranged at a relative distance. The side plate 112 is connected to the bottom plate 111 and is configured to enclose the bottom plate 111 and the cover 13 to form a receiving cavity 10a. An explosion-proof valve 30 and a first air passage 115a are provided on the side plate 112, and an air passage auxiliary component 40 is provided between the side plate 112 and the battery cell 20.

[0111] The bottom plate 111 can be used to install and support the battery cells 20. The side plates 112 can be arranged circumferentially around the bottom plate 111 to form a hollow structure with an opening, which is formed by the end of the side plate 112 away from the bottom plate 111. The side plates 112 can include at least three side plates. In this case, the first air duct 115a can be provided on only one side plate of the side plate 112, for example, on the third side plate 115 as described below. Of course, the first air duct 115a can also be on two adjacent or opposite side plates of the side plate 112, or even on more side plates. When the first air duct 115a is provided on at least two side plates of the side plate 112, the first air ducts 115a on the at least two side plates can be directly connected, or they can be indirectly connected through the air duct auxiliary member 40. In addition, the air passage auxiliary component 40 is located between only one side plate of the box side plate 112 and the battery cell 20. Of course, the air passage auxiliary component 40 can also be located between at least two side plates of the box side plate 112 and the battery cell 20.

[0112] In this embodiment, the explosion-proof valve 30 is disposed on the side plate 112 of the enclosure, making it easily visible so that it can be used for venting and depressurization in the event of thermal runaway of the battery device 100. Furthermore, by disposing of the first air passage 115a on the side plate 112 and the air passage auxiliary component 40 between the side plate 112 and the battery cell 20, the formed depressurization and venting channel can be easily connected to the explosion-proof valve 30. Simultaneously, with the first air passage 115a disposed on the side plate 112, space can be left in the bottom plate 111 to accommodate a liquid cooling channel with a large cooling area for the battery cell 20 located in the accommodating cavity 10a, thereby improving the cooling effect on the battery cell 20. When the air duct auxiliary component 40 is placed between the side panel 112 of the box and the battery cell 20, the space between the battery cell 20 and the side panel 112 can be fully utilized, further reducing the space occupied by the air duct auxiliary component 40 on the installation of the battery cell 20. At the same time, it will not be squeezed by the gravity of the battery cell 20 and will not interfere with the installation arrangement of the battery cell 20.

[0113] Please refer to the reference. Figures 3 to 6 In one embodiment of this application, the side panel 112 includes a first side panel 113, a second side panel 114, and a third side panel 115, and an explosion-proof valve 30 is embedded in the first side panel 113; the battery device 100 also includes a low-pressure sampling module 60, which is embedded in the second side panel 114, at least a portion of the air passage auxiliary component 40 is disposed between the second side panel 114 and the battery cell 20, and the first air passage 115a is disposed in the third side panel 115.

[0114] When there are three side panels in the box side panel 112, the number of the first side panel 113, the second side panel 114, and the third side panel 115 can all be one. When there are four side panels in the box side panel 112, the number of the second side panel 114 can be two, and the number of the third side panel 115 can also be two.

[0115] The low-pressure sampling module 60 is used to collect parameters such as voltage and temperature of the battery cells 20 to monitor their status and ensure safe and efficient operation. The low-pressure sampling module 60 typically works in conjunction with a battery management system (BMS). It acquires voltage and temperature signals from the battery cells 20 through sensors and sampling circuits, and transmits these signals to the BMS for processing and analysis. The BMS can be located within the battery housing 10 or independent of it. The low-pressure sampling module 60 includes, but is not limited to, voltage and temperature sampling circuits. Optionally, it may also include an analog-to-digital converter (ADC) to convert voltage / temperature signals into digital signals. Additionally, it may include protection circuits and filtering circuits. Furthermore, a through-hole can be provided on the second side plate 114 to connect the inside and outside of the battery housing 10 for mounting the low-pressure sampling module 60. In this case, the through-hole prevents the second side plate 114 from having a continuously closed first air duct 115a. Furthermore, a portion of the low-voltage sampling module 60 can also be located on the outside of the battery box 10 and can be detachably connected to the second side plate 114, for example, through threaded connections such as screws or bolts, snap-fit ​​connections, or magnetic connections. This allows the low-voltage sampling module 60 to be directly removed from the outside of the battery box 10 through the through-hole in the second side wall without opening the cover 13, thereby improving the convenience of maintenance and replacement of the low-voltage sampling module 60. Of course, this application is not limited to this; the low-voltage sampling module 60 can also be provided with a non-detachable connection, such as through adhesive or welding connections.

[0116] In this embodiment, the low-pressure sampling module 60 is embedded in the second side plate 114, which reduces the space occupied by the low-pressure sampling module 60 within the battery box 10. Furthermore, by disposing at least a portion of the air passage auxiliary component 40 between the second side plate 114 and the battery cell 20, a compensating air passage can be formed when the second side plate 114 cannot provide a continuously closed first air passage 115a. This allows the air passage to have a longer path to meet the pressure relief and exhaust requirements.

[0117] Please refer to the reference. Figures 4 to 6 In one embodiment of this application, the first side plate 113 and the third side plate 115 are arranged at intervals relative to each other in the first direction, and there are two second side plates 114, which are arranged at intervals relative to each other in the second direction, which intersects with the first direction; there are two low-voltage sampling modules 60, which are respectively disposed on the two second side plates 114.

[0118] The first direction can be the direction in which the battery cells 20 in the same battery pack 20A are stacked. Since the stacking direction of the battery cells 20 is usually the length direction of the battery device 100, the first direction can also be said to be the length direction of the battery device 100. In this case, the second direction can be the width direction of the battery device 100. Of course, this application is not limited to this. In other embodiments, the first direction can also be the width direction of the battery device 100, in which case the second direction can be the length direction of the battery device 100. Two low-voltage sampling modules 60 can be used to collect the same parameter information of the battery cells 20. Of course, the two low-voltage sampling modules 60 can also be used to collect different parameter information of the battery cells 20. For example, one low-voltage sampling module 60 can be set to collect one of the temperature information and voltage information of the battery cells 20, and the other low-voltage sampling module 60 can be set to collect the other of the temperature information and voltage information of the battery cells 20. In this case, by setting different sampling modules to collect different parameter information, targeted maintenance can be performed when the sampling module fails, improving maintenance convenience, and also reducing mutual interference between temperature sampling signals and voltage sampling signals.

[0119] In this embodiment, the two low-voltage sampling modules 60 are respectively mounted on two opposite second side plates 114, which provides ample installation space for both and avoids interference during assembly and disassembly. Simultaneously, it eliminates the need for excessive through-holes in the second side plates 114 to install the low-voltage sampling modules 60, thus helping to ensure the structural strength of the second side plates 114.

[0120] Please refer to Figure 3 In one embodiment of this application, there are multiple battery cells 20, and at least some of the battery cells 20 are stacked along the thickness direction of the battery cells 20 to form a battery pack 20A; the stacking direction of the multiple battery cells 20 in the battery pack 20A is defined as the first direction, and the second side plate 114 is located on one side of the second direction of the battery device 100, and the second direction intersects with the first direction.

[0121] In this embodiment, the first direction is the direction in which the battery cells 20 in the same battery pack 20A are stacked, that is, the length direction of the battery device 100, and the second direction is the width direction of the battery device 100. Therefore, the low-voltage sampling module 60 is disposed on the second side plate 114, that is, the low-voltage sampling module 60 is disposed on one or both sides of the width direction of the battery device 100. At this time, the space occupied by the low-voltage sampling module 60 in the length direction of the battery device 100 can be reduced, so that the battery device 100 can stack more battery cells 20 in its length direction, thereby increasing the number of battery cells 20 in the battery device 100 and improving the energy density of the battery device 100.

[0122] Please refer to the reference. Figures 3 to 6 In one embodiment of this application, the airway auxiliary component 40 includes a first segment 41 and a second segment 43. The first segment 41 is disposed between a second side plate 114 and a battery cell 20, and the second segment 43 is disposed between another second side plate 114 and a battery cell 20. The second airway 40a includes a first channel 40a1 and a second channel 40a2. The first channel 40a1 is disposed in the first segment 41 and connects to the accommodating cavity 10a and the first airway 115a. The second channel 40a2 is disposed in the second segment 43 and connects to the first airway 115a and the explosion-proof valve 30.

[0123] The first segment 41 can be configured to correspond to one second side plate 114. The first segment 41 can be a plate-like structure, stacked with the corresponding second side plate 114 to reduce the space occupied by the battery cell 20. Alternatively, the first segment 41 can be a columnar structure. Furthermore, the first segment 41 can extend linearly, be a zigzag line, or be an arc. Similarly, the second segment 43 can be configured to correspond to another second side plate 114. The second segment 43 can be a plate-like structure, stacked with the corresponding second side plate 114 to reduce the space occupied by the battery cell 20. Alternatively, the second segment 43 can be a columnar structure. Furthermore, the second segment 43 can extend linearly, be a zigzag line, or be an arc. Moreover, when the battery device 100 includes only one battery pack 20A, the battery cells 20 corresponding to the first segment 41 and the second segment 43 can be the same. When the battery device 100 includes at least two side-by-side battery packs 20A, the individual battery cells 20 corresponding to the first section 41 and the second section 43 are different. Furthermore, the first channel 40a1 in the first section 41 and the second channel 40a2 in the second section 43 can be directly connected to the first air passage 115a in the third side plate 115. Alternatively, as described below, the air passage auxiliary can further include a third section 45, through which the first channel 40a1 and the second channel 40a2 are connected to the first air passage 115a via the third channel 40a3 within the third section 45. Similarly, the second channel 40a2 in the second section 43 can be directly connected to the explosion-proof valve 30. Alternatively, as described below, the air passage auxiliary can further include a fourth section 47, through which the second channel 40a2 is connected to the explosion-proof valve 30 in the first air passage 115a via the fourth channel 40a4 within the fourth section 47.

[0124] In this embodiment, the airway auxiliary component 40 is configured to include a first segment 41 and a second segment 43 corresponding to the two second side plates 114 respectively. This allows the corresponding first segment 41 and second segment 43 to compensate for the formation when both second side plates 114 are equipped with low-pressure sampling modules 60, so as to better achieve a longer path for the pressure relief and exhaust channel to meet the pressure relief and exhaust requirements.

[0125] Please refer to the reference. Figure 3 middle Figure 6 In one embodiment of this application, the airway auxiliary component 40 further includes a third segment 45, which is disposed between the third side plate 115 and the battery cell 20; the first airway 115a further includes a third channel 40a3, which is disposed in the third segment 45 and connected to the first channel 40a1, the first airway 115a and the second channel 40a2.

[0126] The third segment 45 is located at the same end of the first segment 41 and the second segment 43, forming a U-shaped structure with the first segment 41 and the second segment 43. The third segment 45 can be a plate-like structure, stacked with the corresponding third side plate 115 to reduce the space occupied by the battery cell 20. Alternatively, the third segment 45 can be a columnar structure. Furthermore, the third segment 45 can extend linearly, extend in a zigzag pattern, or extend in an arc. Additionally, the third segment 45 can be integrated with the first segment 41 and the second segment 43. Alternatively, the third segment 45 can only have a contact relationship with the first segment 41 and / or the second segment 43, in which case the third segment 45 can be connected to the third side plate 115 and / or the bottom plate 111.

[0127] In this embodiment, the air passage auxiliary component 40 is further configured to include a third segment 45 located between the third side plate 115 and the battery cell 20. On the one hand, this can further extend the path of the pressure relief and exhaust channel 50 to improve the pressure relief and exhaust effect on the battery device 100. On the other hand, it can also make the air passage auxiliary component 40 have a larger corresponding area with the third side plate 115, which is conducive to improving the convenience of connecting the second air passage 40a in the air passage auxiliary component 40 with the first air passage 115a in the third side plate 115.

[0128] Please refer to the reference. Figures 5 to 8In one embodiment of this application, a first partition 451 is provided in the third channel 40a3, which divides the third channel 40a3 into a first sub-channel 40a31 and a second sub-channel 40a32 that are isolated from each other. The first sub-channel 40a31 extends along a second direction, with one end connected to the first channel 40a1 and the other end isolated from the second channel 40a2 and connected to the first air passage 115a. The second sub-channel 40a32 extends along the second direction and is arranged side by side with the first sub-channel 40a31. One end of the second sub-channel 40a32 is isolated from the first channel 40a1 and connected to the first air passage 115a, and the other end is connected to the second channel 40a2.

[0129] The first partition 451 can be, as described below, a first partition 4511, a second partition 4512, and a third partition 4513, to divide the third channel 40a3 into a first sub-channel 40a31 and a second sub-channel 40a32 arranged side-by-side in a third direction. This third direction can intersect with the first and second directions. When the first and second directions are respectively the length and width directions of the battery device 100, the third direction can be the width direction of the battery device 100. Alternatively, the first partition 451 can be a tubular structure. In this case, the first sub-channel 40a31 can be located inside the first partition 451, and the second sub-channel 40a32 can be located outside the first partition 451, achieving a nested arrangement of the first sub-channel 40a31 and the second sub-channel 40a32. Therefore, this application does not limit the structural type of the first partition 451.

[0130] In this embodiment, the third channel 40a3 is divided by the first separator 451 to form a first sub-channel 40a31 and a second sub-channel 40a32, both extending along the first direction. The end of the first sub-channel 40a31 near the second channel 40a2 is connected to the first air passage 115a, and the end of the second sub-channel 40a32 near the first channel 40a1 is connected to the first air passage 115a. This allows the gas generated by the battery device 100 during thermal runaway to enter the first sub-channel 40a31. (Please refer to...) Figure 7 and Figure 8 The dashed arrows indicate the gas flow path. Gas can flow along the first section 41 towards the second section 43, entering the first air passage 115a near the second section 43. It can then re-enter the second sub-channel 40a32 near the first section 41, again flowing along the first section 41 towards the second section 43. At this point, the space within the third section 45 and the third side plate 115 can be fully utilized to extend the gas flow path and further extend the path of the pressure-reducing exhaust passage 50, improving the pressure-reducing exhaust effect on the battery device 100.

[0131] Please refer to the reference. Figure 7 and Figure 8 In one embodiment of this application, the third segment 45 extends along a second direction, and the first partition 451 includes a first partition 4511, a second partition 4512, and a third partition 4513. The first partition 4511 extends along the extension direction of the third segment 45; the second partition 4512 is connected to the end of the first partition 4511 near the second segment 43 and extends toward the third upward side; the third partition 4513 is connected to the end of the second partition 4512 near the first segment 41 and extends toward the third upward side.

[0132] The second partition 4512 and the third partition 4513 can be extended in opposite directions upwards. For example, when the second partition 4512 extends downwards, the third partition 4513 can extend upwards; when the second partition 4512 extends upwards, the third partition 4513 can extend downwards.

[0133] In this embodiment, the first partition 451 includes a first partition 4511, a second partition 4512, and a third partition 4513. It can separate the first sub-channel 40a31 and the second sub-channel 40a32, which are arranged side-by-side in a third direction. This allows both the first sub-channel 40a31 and the second sub-channel 40a32 to correspond well with the third side plate 115, thereby improving the convenience of connecting the first sub-channel 40a31 and the second sub-channel 40a32 with the first air passage 115a. Simultaneously, the structure of the first partition 451 is relatively simple, which in turn improves the convenience of processing and shaping the third segment 45.

[0134] Please refer to the reference. Figures 5 to 9 In one embodiment of this application, the third segment 45 is provided with a first through hole 45a and a second through hole 45b on the side facing the third side plate 115. The first through hole 45a is located at the end of the third segment 45 near the second segment 43 and communicates with the first sub-channel 40a31. The second through hole 45b is located at the end of the third segment 45 near the first segment 41 and communicates with the second sub-channel 40a32. The third side plate 115 is provided with a third through hole 115b and a fourth through hole 115c. The third through hole 115b and the fourth through hole 115c communicate with the first air passage 115a. The third through hole 115b communicates with the first through hole 45a, and the fourth through hole 115c communicates with the second through hole 45b.

[0135] In this embodiment, the correspondence between the first through-hole 45a and the third through-hole 115b, and the correspondence between the second through-hole 45b and the fourth through-hole 115c, allows for the connection between the first sub-channel 40a31 and the second sub-channel 40a32 and the first air passage 115a without the need for additional connecting members. This simplifies the number of components in the battery device 100. Simultaneously, it allows the third segment 45 and the third side plate 115 to be fitted together, improving their compact distribution and reducing the space occupied by the third segment 45 on the battery cell 20.

[0136] Additionally, it should be noted that in some embodiments, the third segment 45 may not have a first separator 451. In this case, the first through hole 45a may be located at the end of the third segment 45 near the first segment 41, and the second through hole 45b may be located at the end of the third segment 45 near the second segment 43. When the gas generated by thermal runaway of the battery device 100 enters the third channel 40a3, part of it can flow along the first segment 41 toward the second segment 43 in the third channel 40a3 to enter the second channel 40a2; the other part enters the second gas passage 40a through the first through hole 45a and the third through hole 115b, and then merges with the second through hole 45b again through the fourth through hole 115c to enter the third channel 40a3, and then enters the second channel 40a2.

[0137] Please refer to the reference. Figure 5 and Figure 9 In one embodiment of this application, a second partition 1151 is provided in the first air passage 115a. The second partition 1151 divides the first air passage 115a into at least two sub-air passages 115a1. The at least two sub-air passages 115a1 are arranged side by side and connected in series. In the arrangement direction of the at least two sub-air passages 115a1, one of the two sub-air passages 115a1 located at both ends is connected to a third through hole 115b, and the other is connected to a fourth through hole 115c.

[0138] The second partition 1151 may include multiple sub-partitions 1152 as described below, or it may include a single partition, or it may include multiple parallel tube structures, in which case the sub-air passages 115a1 can be formed from the inner side of each tube. Therefore, this application does not limit the structural type of the second partition 1151. In addition, the at least two sub-air passages 115a1 formed by the second partition 1151 may be arranged along a third direction or in a second direction.

[0139] In this embodiment, the first air passage 115a is divided into at least two parallel sub-air passages 115a1 by the second separator 1151. This can guide the gas generated by thermal runaway of the battery device 100 when it enters the first air passage 115a. Please refer to the gas flow path indicated by the dashed arrow in Figure 9. This allows the gas to form an S-shaped reciprocating flow path, which further extends the gas flow path and the path of the pressure relief and exhaust passage 50, thereby improving the pressure relief and exhaust effect on the battery device 100.

[0140] Please refer to Figure 9 In one embodiment of this application, at least two sub-air passages 115a1 extend along a second direction and are arranged side by side in a third direction.

[0141] In this embodiment, at least two sub-air passages 115a1 are extended along the second direction, so that the second partition 1151 can also extend along the second direction. Since the dimension of the third side plate 115 in the second direction is usually larger than its dimension in the third direction, extending the second partition 1151 along the second direction reduces the number of sub-partitions 1152 in the second partition 1151, thereby improving the ease of processing the third side plate 115.

[0142] Please refer to Figure 5 In one embodiment of this application, the third side plate 115 is provided with openings at both ends in the second direction, and two second side plates 114 respectively cover the openings at both ends of the third side plate 115.

[0143] In this embodiment, the two ends of the third side plate 115 are set as openings, which facilitates the forming of the second partition 1151 inside the third side plate 115. In particular, when the second partition 1151 is extended along the second direction as described above, the forming of the third side plate 115 can be simplified.

[0144] Please refer to the reference. Figure 5 and Figure 9 In one embodiment of this application, the second partition 1151 includes a plurality of sub-partitions 1152, which are arranged side by side at intervals to divide the first airway 115a into a plurality of sub-airways 115a1.

[0145] In this embodiment, the second separator 1151 is configured to include multiple sub-partitions 1152, which can divide the first air passage 115a into more sub-channels, thereby further extending the path of the pressure-reducing exhaust passage 50 and improving the pressure-reducing exhaust effect on the battery device 100. At the same time, the structure of the second separator 1151 is relatively simple, which facilitates the processing and forming of the third side plate 115.

[0146] In one embodiment of this application, the third segment 45 is an integral structure with the first segment 41 and the second segment 43.

[0147] In this embodiment, the third segment 45, the first segment 41, and the second segment 43 are designed as a single integrated structure, which simplifies the number of components and improves the ease of installation and arrangement of the airway auxiliary component 40. It also helps to improve the overall strength and sealing effect of the airway auxiliary component 40.

[0148] Please refer to the reference. Figures 3 to 6 ,as well as Figure 10 In one embodiment of this application, the airway auxiliary component 40 further includes a fourth segment 47, which is disposed between the first side plate 113 and the battery cell 20 and is disposed corresponding to the explosion-proof valve 30; the first airway 115a further includes a fourth channel 40a4, which is disposed in the fourth segment 47 and is connected to the second channel 40a2 and the explosion-proof valve 30.

[0149] The fourth segment 47 is located at the end of the second segment 43 away from the third segment 45, forming an L-shaped structure with the second segment 43. The fourth segment 47 can be a plate-like structure, stacked with the corresponding first side plate 113 to reduce the space occupied by the battery cell 20. Alternatively, the fourth segment 47 can be a columnar structure. Furthermore, the fourth segment 47 can extend linearly, extend in a zigzag pattern, or extend in an arc. Additionally, the fourth segment 47 can be integrated with the second segment 43. Alternatively, the fourth segment 47 and the second segment 43 can only have abutting contact, in which case the fourth segment 47 can be connected to the first side plate 113 and / or the bottom plate 111.

[0150] In this embodiment, the airway auxiliary component 40 is further configured to include a fourth segment 47. On the one hand, the correspondence between the fourth segment 47 and the explosion-proof valve 30 can improve the connection between the airway auxiliary component 40 and the explosion-proof valve 30. On the other hand, the path of the pressure-reducing exhaust channel 50 can be further extended to improve the pressure-reducing exhaust effect on the battery device 100.

[0151] Please refer to Figure 10 In one embodiment of this application, the fourth segment 47 is provided with a mounting hole 47a on the side facing the first side plate 113, and the mounting hole 47a is connected to the fourth channel 40a4; a portion of the explosion-proof valve 30 passes through the mounting hole 47a and is connected to the fourth channel 40a4.

[0152] In this embodiment, a portion of the explosion-proof valve 30 extends directly into the mounting hole 47a of the fourth section 47. This allows the air inlet of the explosion-proof valve 30 to directly connect with the fourth channel 40a4, eliminating the need for additional connecting parts. This improves the ease of communication between the airway auxiliary component 40 and the explosion-proof valve 30. Simultaneously, it also enhances the compactness of the distribution between the airway auxiliary component 40 and the explosion-proof valve 30, reducing the space occupied by the airway auxiliary component 40 in the installation of the battery cell 20.

[0153] Please refer to the reference. Figure 3 and Figure 5 In one embodiment of this application, the fourth segment 47 extends along the second direction, with one end connected to the second segment 43 and the other end spaced apart from the first segment 41, and the fourth channel 40a4 extends along the extension direction of the fourth segment 47.

[0154] In this embodiment, the fourth segment 47 extends along the second direction, and the fourth channel 40a4 extends along the extension direction of the fourth segment 47. This ensures that the extended shape of the fourth segment 47 is consistent with the extended shape of the inner fourth channel 40a4, both being relatively regular, thus improving the ease of processing and forming the fourth segment 47. Furthermore, connecting one end of the fourth segment 47 to the second segment 43 improves the ease of communication between the fourth channel 40a4 and the second channel 40a2. By spacing the other end of the fourth segment 47 from the first segment 41, the fourth segment 47 and the explosion-proof valve 30 are more closely aligned, avoiding excessively long, ineffective lengths.

[0155] In one embodiment of this application, the fourth segment 47 and the second segment 43 are an integral structure.

[0156] In this embodiment, the fourth segment 47 and the second segment 43 are integrated into a single structure, which simplifies the number of parts and improves the ease of installation and arrangement of the airway auxiliary component 40. It also helps to improve the overall strength and sealing effect of the airway auxiliary component 40.

[0157] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the first segment 41 is provided with an opening at one end near the first side plate 113 to be configured as an air inlet 41a of the pressure relief exhaust channel 50, and the air inlet 41a is connected to the accommodating cavity 10a.

[0158] In this embodiment, the end of the first segment 41 near the first side plate 113 is directly open, eliminating the need for an additional opening on the first segment 41 to form an air inlet 41a. This simplifies the structure of the first segment 41 and improves the ease of its processing and molding. The end of the first segment 41 near the first side plate 113 can be spaced apart from the first side plate 113 to allow gas generated by thermal runaway from the battery device 100 to enter.

[0159] Please refer to Figure 6 In one embodiment of this application, the first segment 41 extends along a first direction, and the first channel 40a1 extends along the extension direction of the first segment 41.

[0160] In this embodiment, the first segment 41 is extended along the first direction, and the first channel 40a1 is extended along the extension direction of the first segment 41. This makes the extension shape of the outer surface of the first segment 41 consistent with the extension shape of the inner first channel 40a1, both of which are relatively regular, thereby improving the convenience of processing and forming the first segment 41.

[0161] Please refer to Figure 6 In one embodiment of this application, the second segment 43 extends along the first direction, and the second channel 40a2 extends along the extension direction of the first segment 41.

[0162] In this embodiment, the second segment 43 is extended along the first direction, and the second channel 40a2 is extended along the extension direction of the second segment 43. This makes the extension shape of the outer surface of the second segment 43 consistent with the extension shape of the inner second channel 40a2, both of which are relatively regular, thereby improving the convenience of processing and forming the second segment 43.

[0163] In one embodiment of this application, in a cross section perpendicular to the extending direction of the air passage auxiliary member 40, the dimension of the air passage auxiliary member 40 in the arrangement direction of the battery cell 20 and the side plate 112 is defined as L1, and the cross section in the arrangement direction of the bottom plate 111 and the cover 13 is defined as L2, satisfying the relationship: L2 > L1.

[0164] The arrangement direction of the battery cell 20 and the side panel 112 can be either the first direction or the second direction, i.e., the horizontal direction. The arrangement direction of the bottom panel 111 and the cover 13 can be either the third direction, i.e., the height direction or the vertical direction.

[0165] In this embodiment, setting the vertical dimension L2 of the air duct auxiliary component 40 to be larger than the horizontal dimension L1 allows the air duct auxiliary component 40 to form a flat structure at all points. This facilitates full utilization of the vertical space, thereby reducing the horizontal space occupied by the air duct auxiliary component 40 on the installation space of the battery cell 20.

[0166] Please refer to the reference. Figure 3 , Figure 6 as well as Figure 7 In one embodiment of this application, the airway auxiliary component 40 is recessed into a relief groove 40b at the position corresponding to the low-pressure sampling module 60, and a portion of the low-pressure sampling module 60 is accommodated in the relief groove 40b.

[0167] The clearance groove 40b can be provided on the first section 41 and the second section 43 of the airway auxiliary component 40, and is formed by the portion of the first section 41 and the second section 43 corresponding to the low-pressure sampling module 60 protruding toward the center of the accommodating cavity 10a.

[0168] In this embodiment, the airway auxiliary component 40 is provided with a clearance groove 40b for the low-pressure sampling module 60, so that the airway auxiliary component 40 can better adapt to the shape between the battery cell 20 and the side plate in the housing 11 where the low-pressure sampling module 60 is installed. That is, the airway auxiliary component 40 can avoid the low-pressure sampling module 60 at the corresponding position, and can fit against the housing 11 at the position where it does not correspond to the low-pressure sampling module 60.

[0169] In one embodiment of this application, the cross-sectional area of ​​the second airway 40a is defined as S, satisfying the relationship: 100mm 2 ≤S≤2000mm 2 .

[0170] In this embodiment, the cross-sectional area S of the second airway 40a is set to 100 mm. 2 Up to 2000mm 2 This design ensures that the cross-sectional area of ​​the second air passage 40a is not too small, which would affect the gas flow and thus the decompression and exhaust effect on the battery device 100. Simultaneously, it also prevents the cross-sectional area of ​​the second air passage 40a from being too large, which would require a correspondingly larger volume of the air passage auxiliary component 40 and thus occupy more space. Therefore, this range of the cross-sectional area S of the second air passage 40a can effectively balance the decompression and exhaust effect on the battery device 100 with the compact structural distribution of the battery device 100. The value of the cross-sectional area S of the second air passage 40a can be 100 mm². 2 200mm 2 300mm 2 400mm², 500mm², 600mm², 700mm², 800mm², 900mm², 1000mm (vehicles), 1000mm², 1100mm², 1200mm², 1300mm², 1400mm², 1500mm², 1600mm 21700mm², 1800mm², 1900mm², or 2000mm², or any value within the above range.

[0171] Please refer to the reference. Figures 2 to 10In one embodiment of this application, the battery device 100 includes a battery box 10, a battery cell 20, an explosion-proof valve 30, and an air passage auxiliary component 40. The battery box 10 includes a box body 11 and a box cover 13, which are configured to enclose a cavity 10a. The box body 11 is provided with a first air passage 115a. The battery cell 20 is disposed in the cavity 10a. The explosion-proof valve 30 is disposed in the box body 11. The air passage auxiliary component 40 is disposed between the box body 11 and the battery cell 20. The air passage auxiliary component 40 is provided with a second air passage 40a, which is connected to the first air passage 115a to form a pressure-reducing exhaust channel 50. The pressure-reducing exhaust channel 50 is connected to the cavity 10a and the explosion-proof valve 30. The enclosure 11 includes a bottom plate 111 and a side plate 112. The bottom plate 111 and the cover 13 are spaced apart from each other. The side plate 112 is connected to the bottom plate 111 and, together with the bottom plate 111 and the cover 13, forms a cavity 10a. An explosion-proof valve 30 and a first air duct 115a are located on the side plate 112, and an air duct auxiliary component 40 is located between the side plate 112 and the battery cell 20. The side plate 112 includes a first side plate 113, a second side plate 114, and a third side plate 115. The explosion-proof valve 30 is embedded in the first side plate 113. The battery device 100 also includes a low-pressure sampling module 60, which is embedded in the second side plate 114. At least a portion of the air duct auxiliary component 40 is located between the second side plate 114 and the battery cell 20, and the first air duct 115a is located on the third side plate 115. The first side plate 113 and the third side plate 115 are arranged at intervals relative to each other in the first direction. There are two second side plates 114, which are arranged at intervals relative to each other in the second direction intersecting the first direction. The air passage auxiliary component 40 includes a first section 41 and a second section 43. The first section 41 is disposed between one second side plate 114 and the battery cell 20, and the second section 43 is disposed between the other second side plate 114 and the battery cell 20. The second air passage 40a includes a first channel 40a1 and a second channel 40a2. The first channel 40a1 is disposed in the first section 41 and connects to the accommodating cavity 10a and the first air passage 115a. The second channel 40a2 is disposed in the second section 43 and connects to the first air passage 115a and the explosion-proof valve 30. The airway auxiliary component 40 also includes a third section 45, which is disposed between the third side plate 115 and the battery cell 20; the first airway 115a also includes a third channel 40a3, which is disposed in the third section 45 and connected to the first channel 40a1, the first airway 115a and the second channel 40a2.The third channel 40a3 is provided with a first partition 451, which divides the third channel 40a3 into a first sub-channel 40a31 and a second sub-channel 40a32 that are isolated from each other. The first sub-channel 40a31 extends along the second direction, with one end connected to the first channel 40a1 and the other end isolated from the second channel 40a2 and connected to the first airway 115a. The second sub-channel 40a32 extends along the second direction and is arranged side by side with the first sub-channel 40a31. One end of the second sub-channel 40a32 is isolated from the first channel 40a1 and connected to the first airway 115a, and the other end is connected to the second channel 40a2. The first partition 451 includes a first partition 4511, a second partition 4512, and a third partition 4513. The first partition 4511 extends along a second direction. The second partition 4512 is connected to one end of the first partition 4511 near the second segment 43 and extends toward the third direction, which intersects the first and second directions. The third partition 4513 is connected to one end of the second partition 4512 near the first segment 41 and extends toward the other side. The third section 45 has a first through hole 45a and a second through hole 45b on the side facing the third side plate 115. The first through hole 45a is located at the end of the third section 45 near the second section 43 and is connected to the first sub-channel 40a31. The second through hole 45b is located at the end of the third section 45 near the first section 41 and is connected to the second sub-channel 40a32. The third side plate 115 has a third through hole 115b and a fourth through hole 115c. The third through hole 115b and the fourth through hole 115c are connected to the first air passage 115a. The third through hole 115b is connected to the first through hole 45a, and the fourth through hole 115c is connected to the second through hole 45b. The first air passage 115a is provided with a second partition 1151, which divides the first air passage 115a into at least two sub-air passages 115a1. The at least two sub-air passages 115a1 are arranged side by side and connected in series. In the arrangement direction of the at least two sub-air passages 115a1, one of the two sub-air passages 115a1 located at both ends is connected to a third through hole 115b, and the other is connected to a fourth through hole 115c. The at least two sub-air passages 115a1 extend along a second direction and are arranged side by side in a third direction, which intersects the first and second directions. The second partition 1151 includes a plurality of sub-partitions 1152, which are arranged side by side at intervals to divide the first air passage 115a into a plurality of sub-air passages 115a1. The third segment 45 is an integral structure with the first segment 41 and the second segment 43.The airway auxiliary component 40 also includes a fourth segment 47, which is disposed between the first side plate 113 and the battery cell 20 and corresponds to the explosion-proof valve 30. The first airway 115a also includes a fourth channel 40a4, which is disposed in the fourth segment 47 and connects to the second channel 40a2 and the explosion-proof valve 30. A mounting hole 47a is provided on the side of the fourth segment 47 facing the first side plate 113, and the mounting hole 47a connects to the fourth channel 40a4. A portion of the explosion-proof valve 30 passes through the mounting hole 47a and connects to the fourth channel 40a4. The fourth segment 47 extends along a second direction, with one end connected to the second segment 43 and the other end spaced apart from the first segment 41. The fourth channel 40a4 extends along the extending direction of the fourth segment 47. The fourth segment 47 and the second segment 43 are an integral structure. The first segment 41 is open at one end near the first side plate 113 to form an air inlet 41a of the pressure-reducing exhaust channel 50, which is connected to the accommodating cavity 10a. The first segment 41 extends along a first direction, and a first channel 40a1 extends along the extending direction of the first segment 41. The second segment 43 extends along the first direction, and a second channel 40a2 extends along the extending direction of the first segment 41. The third side plate 115 is open at both ends in a second direction, and two second side plates 114 respectively cover the openings at both ends of the third side plate 115. In a cross-section perpendicular to the extending direction of the air duct auxiliary member 40, the dimension of the air duct auxiliary member 40 in the arrangement direction of the battery cell 20 and the side plate 112 is defined as L1, and the cross-section in the arrangement direction of the bottom plate 111 and the cover 13 is defined as L2, satisfying the relationship: L2 > L1. The airway auxiliary component 40 is recessed into a clearance groove 40b at the position corresponding to the low-pressure sampling module 60, and a portion of the low-pressure sampling module 60 is accommodated in the clearance groove 40b. There are multiple battery cells 20, and at least some of the battery cells 20 are stacked along the thickness direction of the battery cells 20 to form a battery pack 20A; the stacking direction of the multiple battery cells 20 in the battery pack 20A is defined as the first direction. The cross-sectional area of ​​the second airway 40a is defined as S, satisfying the relationship 100mm. 2 ≤S≤2000mm 2 .

[0172] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery box, the battery box including a box body and a box cover, the box body and the box cover being configured to enclose a receiving cavity, the box body being provided with a first air passage; A battery cell, wherein the battery cell is disposed in the accommodating cavity; An explosion-proof valve, wherein the explosion-proof valve is disposed in the enclosure; and An air passage auxiliary component is disposed between the housing and the battery cell. The air passage auxiliary component has a second air passage, which is connected to the first air passage to form a pressure-reducing exhaust channel. The pressure-reducing exhaust channel is connected to the accommodating cavity and the explosion-proof valve.

2. The battery device as claimed in claim 1, characterized in that, The enclosure includes: The bottom plate of the box is provided at a relative interval from the lid of the box; and A side panel of the box, which is connected to the bottom plate of the box and is configured to enclose the accommodating cavity together with the bottom plate of the box and the box cover; The explosion-proof valve and the first air passage are located on the side plate of the box, and the air passage auxiliary component is located between the side plate of the box and the battery cell.

3. The battery device as claimed in claim 2, characterized in that, The side panel of the box includes a first side panel, a second side panel, and a third side panel, and the explosion-proof valve is embedded in the first side panel; The battery device further includes a low-pressure sampling module, which is embedded in the second side plate. At least a portion of the air passage auxiliary component is disposed between the second side plate and the battery cell, and the first air passage is disposed in the third side plate.

4. The battery device as claimed in claim 3, characterized in that, The first side plate and the third side plate are arranged at a distance from each other in a first direction, and there are two second side plates, which are arranged at a distance from each other in a second direction that intersects the first direction. The airway auxiliary component includes a first section and a second section. The first section is disposed between a second side plate and the battery cell, and the second section is disposed between another second side plate and the battery cell. The second airway includes a first channel and a second channel. The first channel is located in the first segment and connects to the accommodating cavity and the first airway. The second channel is located in the second segment and connects to the first airway and the explosion-proof valve.

5. The battery device as claimed in claim 4, characterized in that, The airway auxiliary component also includes a third section, which is disposed between the third side plate and the battery cell; The first airway also includes a third channel, which is located in the third segment and connects to the first channel, the first airway and the second channel.

6. The battery device as claimed in claim 5, characterized in that, The third channel is provided with a first separator to divide the third channel into a first sub-channel and a second sub-channel that both extend along the second direction and are arranged side by side; One end of the first sub-channel is connected to the first channel, and the other end is isolated from the second channel and connected to the first airway; One end of the second sub-channel is isolated from the first channel and connected to the first airway, while the other end is connected to the second channel.

7. The battery device as claimed in claim 6, characterized in that, The first separator includes: A first partition, which extends along the second direction; A second partition plate is connected to the end of the first partition plate near the second segment and extends toward a third direction, the third direction intersecting the first direction and the second direction; and The third partition is connected to the end of the second partition near the first segment and extends toward the other side upwards.

8. The battery device as claimed in claim 6, characterized in that, The third segment body has a first through hole and a second through hole on the side facing the third side plate. The first through hole is located at the end of the third segment body near the second segment body and communicates with the first sub-channel. The second through hole is located at the end of the third segment body near the first segment body and communicates with the second sub-channel. The third side plate is provided with a third through hole and a fourth through hole, which are connected to the first air passage. The third through hole is connected to the first through hole, and the fourth through hole is connected to the second through hole.

9. The battery device as claimed in claim 5, characterized in that, The third section has a first through hole and a second through hole on the side facing the third side plate, and the first through hole and the second through hole are connected to the third channel; The third side plate is provided with a third through hole and a fourth through hole, which are connected to the first air passage. The third through hole is connected to the first through hole, and the fourth through hole is connected to the second through hole.

10. The battery device as claimed in claim 9, characterized in that, The first airway is provided with a second partition to divide the first airway into at least two sub-airways, the at least two sub-airways being arranged side by side and connected in series. In the arrangement direction of the at least two sub-air passages, one of the two sub-air passages located at both ends is connected to the third through hole, and the other is connected to the fourth through hole.

11. The battery device as claimed in claim 10, characterized in that, The at least two sub-air passages extend along the second direction and are arranged side by side in a third direction, the third direction intersecting the first direction and the second direction.

12. The battery device as claimed in claim 10, characterized in that, The second separator includes a plurality of sub-partitions arranged side-by-side at intervals to divide the first airway into a plurality of sub-airways.

13. The battery device as claimed in claim 5, characterized in that, The third segment is an integral structure with the first and second segments.

14. The battery device according to any one of claims 4 to 13, characterized in that, The airway auxiliary component also includes a fourth section, which is disposed between the first side plate and the battery cell and is configured corresponding to the explosion-proof valve. The first air passage also includes a fourth channel, which is located in the fourth segment and connected to the second channel and the explosion-proof valve.

15. The battery device as claimed in claim 14, characterized in that, The fourth segment has a mounting hole on the side facing the first side plate, and the mounting hole is connected to the fourth channel; Part of the explosion-proof valve passes through the mounting hole and communicates with the fourth channel.

16. The battery device as claimed in claim 14, characterized in that, The fourth segment extends along the second direction, with one end connected to the second segment and the other end spaced apart from the first segment. The fourth channel extends along the extension direction of the fourth segment.

17. The battery device as claimed in claim 14, characterized in that, The fourth segment and the second segment are an integral structure.

18. The battery device according to any one of claims 4 to 13, characterized in that, The first segment body has an opening at one end near the first side plate to be configured as the air inlet of the pressure relief exhaust channel, and the air inlet is connected to the accommodating cavity.

19. The battery device according to any one of claims 4 to 13, characterized in that, The first segment extends along the first direction, and the first channel extends along the extension direction of the first segment.

20. The battery device according to any one of claims 4 to 13, characterized in that, The second segment extends along the first direction, and the second channel extends along the extension direction of the first segment.

21. The battery device according to any one of claims 4 to 13, characterized in that, The third side plate is open at both ends in the second direction, and the two second side plates respectively cover the openings at both ends of the third side plate.

22. The battery device according to any one of claims 2 to 13, characterized in that, In a cross section perpendicular to the extension direction of the air passage auxiliary component, the dimension of the air passage auxiliary component in the arrangement direction of the battery cell and the side panel of the box is defined as L1, and the cross section in the arrangement direction of the bottom plate of the box and the cover of the box is defined as L2, satisfying the relationship: L2 > L1.

23. The battery device according to any one of claims 3 to 13, characterized in that, The airway auxiliary component is recessed into a clearance groove at the position corresponding to the low-pressure sampling module, and a portion of the low-pressure sampling module is accommodated in the clearance groove.

24. The battery device according to any one of claims 3 to 13, characterized in that, The number of battery cells is multiple, and at least some of the battery cells are stacked along the thickness direction of the battery cells to form a battery pack; The stacking direction of the plurality of battery cells in the battery pack is defined as a first direction, and the second side plate is located on one side of a second direction of the battery device, the second direction intersecting the first direction.

25. The battery device according to any one of claims 1 to 13, characterized in that, Define the cross-sectional area of ​​the second airway as S, satisfying the relationship: 100mm 2 ≤S≤2000mm 2 .

26. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 25.

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