A battery device

Abstract

This application discloses a battery device comprising at least one battery module, each battery module including a module body and at least one first pressure relief mechanism. The module body includes at least one battery cell, each battery cell having a pressure relief valve. The first pressure relief mechanism is connected to the pressure relief valve of at least one battery cell and has a double-layer flow channel, with both channels connected to the same pressure relief valve. The double-layer flow channel is used for gas-liquid separation of the fluid released from the pressure relief valve. This battery device can solve the technical problem of low safety performance in related technologies.

Description

Technical Field

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

[0002] Battery devices are currently the mainstream energy storage components, widely used in various electronic devices due to their advantages such as high energy density and low self-discharge. However, existing battery devices have poor thermal stability. Under abnormal conditions such as overcharging, over-discharging, high-temperature thermal shock, and compression, the internal chemical reaction of the battery device intensifies, producing a mixture containing a large amount of high-temperature and high-pressure gas and electrolyte. This leads to a sharp increase in internal pressure (i.e., thermal runaway), requiring pressure relief and explosion prevention through explosion venting pipes.

[0003] However, existing explosion venting pipes lack a separation structure. When the gas-liquid mixture enters the pipe, the gaseous and liquid substances obstruct each other, resulting in poor pressure relief and affecting pressure relief efficiency. Furthermore, the accumulated gas-liquid mixture exerts significant pressure on the explosion venting pipe. If this pressure continues to accumulate, it can overflow into the module from weak points or connections in the pipe, posing a serious safety hazard to the battery device. Summary of the Invention

[0004] This application provides a battery device to solve the technical problem of low safety performance of battery devices in the related art.

[0005] To address the aforementioned technical problems, this application provides a battery device comprising: at least one battery module; wherein each battery module comprises: a module body including at least one battery cell, each battery cell having a pressure relief valve; at least one first pressure relief mechanism, the first pressure relief mechanism being connected to the pressure relief valve of at least one battery cell, the first pressure relief mechanism having a double-layer flow channel, both flow channels in the double-layer flow channel being connected to the same pressure relief valve, the double-layer flow channel being used for gas-liquid separation of the fluid discharged by the pressure relief valve.

[0006] Optionally, the first explosion relief mechanism includes a main body and an isolation plate. The main body has an accommodating space, and the isolation plate is disposed within the accommodating space to divide the accommodating space into a double-layer flow channel.

[0007] Optionally, the double-layer flow channel includes a first flow channel and a second flow channel arranged along a first direction, both of which are connected to the same pressure relief valve; wherein, the first direction has a vertical component; one of the first and second flow channels is used to collect gas, and the other of the first and second flow channels is used to collect liquid.

[0008] Optionally, the first flow channel and the second flow channel are connected to the pressure relief valves of at least two battery cells arranged along the second direction, the first direction being perpendicular to the second direction.

[0009] Optionally, at least one of the double-layered flow channels is provided with an encapsulation layer to form a placement groove within the flow channel for placing reactants for reacting with the fluid released by the pressure relief valve.

[0010] Optionally, the battery device further includes: at least one second explosion venting mechanism, which is connected to the double-layer flow channel of the first explosion venting mechanism in at least one battery module, and is used to receive the gas-liquid separated fluid from the first explosion venting mechanism and to discharge the gas-liquid separated fluid out of the battery device.

[0011] Optionally, the second explosion relief mechanism includes a third flow channel, which is connected to both flow channels in the double-layer flow channel, and the extension direction of the third flow channel is perpendicular to the extension direction of the double-layer flow channel.

[0012] Optionally, the third flow channel is connected to the double-layer flow channels of multiple first explosion relief mechanisms.

[0013] Optionally, the third flow channel extends in a vertical direction.

[0014] Optionally, the battery device also includes an exhaust flame arrestor mechanism, which has an exhaust channel, one end of which is connected to one end of the third flow channel and the other end of which is connected to the outside of the battery device; the exhaust channel is used to cool the gas flowing in from the third flow channel so that it is below its ignition point.

[0015] Optionally, the battery module further includes: a sealing component disposed between the module body and the first explosion relief mechanism. The sealing component has a connection hole. One end of the sealing component is sealed to the corresponding battery cell. One end of the connection hole is connected to the corresponding pressure relief valve. The other end of the sealing component is sealed to the first explosion relief mechanism. The other end of the connection hole is connected to the corresponding through hole on the first explosion relief mechanism. The through hole is connected to the double-layer flow channel. The connection hole is used to guide the fluid released by the pressure relief valve to the double-layer flow channel.

[0016] Optionally, the sealing assembly includes at least one elastic element having at least one connection hole; one end of the elastic element is sealed to the battery cell, and the other end of the elastic element is sealed to the first explosion relief mechanism.

[0017] Optionally, the elastic element includes an elastic sealing ring, and the sealing assembly further includes a support member. The support member surrounds the outer peripheral surface of the elastic sealing ring and abuts against both ends of the elastic sealing ring. The two ends of the elastic sealing ring are respectively used for sealing connection with the battery cell and the first explosion relief mechanism.

[0018] Optionally, the support includes an elastic support having the ability to deform axially along the elastic seal.

[0019] Optionally, the elastic sealing ring has double lips at both ends, and the support is located between the two double lips, with the two double lips facing opposite directions; one of the double lips is used for sealing connection with the battery cell, and the other double lip is used for sealing connection with the first explosion relief mechanism.

[0020] Optionally, the double lip portion includes a first protrusion and a second protrusion arranged axially spaced along the elastic sealing ring.

[0021] Optionally, the elastic element includes a flexible tube and an interface; one end of the interface is sealed to the pressure relief valve of the corresponding battery cell, the other end of the interface is sealed to one end of the flexible tube, and the other end of the flexible tube is sealed to the first explosion relief mechanism.

[0022] Optionally, the elastic element includes a sealing plate having multiple connection holes.

[0023] Optionally, the sealing plate includes a graphene sealing sheet or a silicone foam sealing sheet with connection holes.

[0024] Optionally, the battery module further includes: a pressure plate assembly, including at least one pressure plate, the pressure plate being connected to the first explosion relief mechanism and the end plate of the battery module respectively, to fix the first explosion relief mechanism.

[0025] Unlike existing technologies, the advantages of this application are as follows: The battery device of this application includes at least one battery module, each battery module including a module body and at least one first pressure relief mechanism. The flow channel of the first pressure relief mechanism is connected to the pressure relief valve of the cell in the module body. The flow channel of the first pressure relief mechanism can be used to discharge the fluid released by the pressure relief valve out of the battery module and further out of the battery device. Since the flow channel of the first pressure relief mechanism is a double-layer flow channel, and both flow channels in the double-layer flow channel are connected to the same pressure relief valve, the gas-liquid mixture released by the pressure relief valve can be separated into gas and liquid states. This allows the liquid and gaseous substances to have independent flow channels, which not only reduces mutual interference between the two and improves the discharge efficiency of both, reduces the occurrence of fluid accumulation, but also reduces the defect of fluid overflowing into the module, thus improving the safety of the battery device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the structure of the battery module provided in some embodiments of this application; Figure 2This is a partial disassembly diagram of a battery module provided in some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the first explosion relief mechanism provided in some embodiments of this application; Figure 4 This is a partial structural schematic diagram of the first explosion relief mechanism provided in some embodiments of this application; Figure 5 These are schematic diagrams of the battery device provided in some embodiments of this application; Figure 6 This is a partial disassembly diagram of a battery module provided in some embodiments of this application; Figure 7 This is a schematic diagram of the structure of the first explosion relief mechanism and sealing assembly provided in some embodiments of this application; Figure 8 yes Figure 7 Enlarged schematic diagram of region A in the middle; Figure 9 This is a schematic diagram of the structure of the first explosion relief mechanism, battery cell and sealing assembly provided in some embodiments of this application; Figure 10 yes Figure 9 Schematic diagram of the structure of the medium elastic sealing ring; Figure 11 yes Figure 9 Schematic diagram of the elastic sealing ring and elastic support component; Figure 12 This is a schematic diagram of the structure of the first explosion relief mechanism, battery cell and sealing assembly provided in some embodiments of this application; Figure 13 yes Figure 12 A schematic diagram of the interface component; Figure 14 This is a schematic diagram of the structure of the battery module provided in some embodiments of this application; Figure 15 yes Figure 14 A schematic diagram of the structure in which the first explosion venting mechanism is fixedly connected to the sealing assembly; Figure 16 yes Figure 14 A schematic diagram showing the separation of the first explosion venting mechanism from the sealing assembly; Figure 17 These are schematic diagrams of the battery device provided in some embodiments of this application; Figure 18 This is a schematic diagram of the structure of the battery device provided in some embodiments of this application.

[0027] Figure label: 100. Battery device; 10. Battery module; 11. Module body; 111. Battery cell; 112. Pressure relief valve; 12. First explosion relief mechanism; 121. Main component; 122. Isolation plate; 123. First flow channel; 124. Second flow channel; 125. Encapsulation layer; 126. Placement slot; 127. Through hole; 13. Sealing assembly; 131. Connection hole; 132. Elastic component; 1321. Elastic sealing ring; 1322. Flexible tube; 1323. Interface component; 133. Support component; 1331. Elastic support component; 1324, sealing plate; 14, pressure plate assembly; 141, pressure plate; 15, locking assembly; 151, mounting bracket; 152, locking component; 1521, first connecting part; 1522, second connecting part; 1523, connecting rod assembly; 1524, driving component; 1525, pressure nozzle; 16, end plate; 161, upper left plate; 162, upper right plate; 163, lower left plate; 164, lower right plate; 165, first side plate; 166, second side plate; 17, heat insulation component; 20. Second explosion relief mechanism; 21. Third flow channel; 201. Double lip; 2011. Annular groove; 202. Annular body; 203. First protrusion; 204. Second protrusion; 205. First connecting surface; 206. Second connecting surface; 207. Third connecting surface; 22. Connector; 23. First connecting rod; 24. Second connecting rod; 25. Operation panel; 26. Pressure rod; 30. Collection box; 40. Exhaust flame arrestor mechanism; 50. Cabinet; 51. First sensor; 52. Second sensor; 53. Electric spark ignition mechanism; X1, first direction; X2, second direction; X3, third direction. Detailed Implementation

[0028] 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.

[0029] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators 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 indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are 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, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If 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.

[0031] Common battery devices have poor thermal stability. Under abnormal conditions such as overcharging, over-discharging, high-temperature thermal shock, and compression, the internal chemical reaction of the battery device intensifies, producing a mixture containing a large amount of high-temperature and high-pressure gas and electrolyte. This causes the internal pressure of the battery device to rise sharply (i.e., thermal runaway), requiring a pressure relief structure for pressure relief and explosion prevention.

[0032] In existing explosion venting structures, the explosion venting pipes lack separation mechanisms. After the gas-liquid mixture enters the explosion venting pipe, the electrolyte occupies the pipe cross-section, obstructing gas flow and causing poor pressure relief. Gas can easily overflow from pipe connections or weak points into the battery device, posing a serious safety hazard. Alternatively, high-temperature electrolyte may condense and accumulate in the pipe upon encountering cold, blocking the explosion venting pipe and preventing gas from escaping smoothly. After continuous pressure accumulation, gas can overflow from weak points or connections into the battery device. The overflowing conductive electrolyte can also easily cause short circuits and fires, posing a serious safety hazard.

[0033] To address the aforementioned shortcomings, this application provides a battery device and an electronic device. Please refer to [link to relevant documentation]. Figures 1-18 .

[0034] According to some embodiments of this application, please refer to Figures 1-18 This application provides a battery device 100, which includes at least one battery module 10. The number of battery modules 10 in the battery device 100 is determined according to actual conditions, such as one, two, three or others, and is not limited here. The battery device 100 involved in this application can be a cylindrical battery, a prismatic battery, a pouch battery or others; the battery device 100 can be a lithium battery or others, and is not limited here.

[0035] Each battery module 10 includes a module body 11 and at least one first pressure relief mechanism 12. The module body 11 includes at least one battery cell 111, and each battery cell 111 has a pressure relief valve 112. Each first pressure relief mechanism 12 is connected to the pressure relief valve 112 of at least one battery cell 111. The first pressure relief mechanism 12 has a double-layer flow channel, and both flow channels in the double-layer flow channel are connected to the same pressure relief valve 112. The double-layer flow channel is used to perform gas-liquid separation on the fluid discharged by the pressure relief valve 112.

[0036] The number of first explosion relief mechanisms 12 in each battery module 10 can be determined according to the actual situation, such as 1, 2 or others, and there is no restriction here.

[0037] The number of battery cells 111 in each module body 11 can be determined according to the actual situation, such as 1, 2 or others, and there is no restriction here. The battery cell 111 can be a cylindrical cell, a square cell, a pouch cell or others, and there is no restriction here.

[0038] It is worth noting that under uncontrolled conditions such as overcharging, over-discharging, high-temperature thermal shock, and compression, the fluid released from inside the battery cell 111 is a gas-liquid mixture. The liquid in the gas-liquid mixture is usually the electrolyte, and the gas is mainly flammable gases such as CO and H2. Both the gas and liquid are at high temperatures and have high corrosive properties when released from the battery cell 111. As the gas-liquid mixture is released, the internal pressure of the battery device 100 increases sharply. If it is not released in time, the battery cell 111 will expand to the point of rupture, which will lead to the leakage of the gas-liquid mixture into the cabinet of the battery device 100. The electrolyte may cause short circuits or overheating in other normal battery cells 111 inside the battery device 100, and the flammable gas may be ignited by an electric spark, potentially causing the battery device 100 to explode and be damaged.

[0039] To prevent fire and explosion, this application utilizes a pressure relief valve 112 to release fluid (i.e., a gas-liquid mixture). Specifically, as the internal pressure of the battery device 100 increases, the pressure relief valve 112 can automatically open when the pressure reaches a preset threshold (typically between 0.5-2 MPa, depending on the specific design of the battery cell 111 model) to release the fluid. The timely release of fluid by the pressure relief valve 112 can reduce the internal temperature and pressure of the battery cell 111 and the battery device 100, preventing thermal runaway from spreading to adjacent battery cells 111 and preventing the battery cell 111 and the battery device 100 from bursting due to excessive pressure, generating fragments and shock waves.

[0040] The number of pressure relief valves 112 in each battery cell 111 can be determined according to the actual situation. In one application scenario, each battery cell 111 has one pressure relief valve 112. In another application scenario, each battery cell 111 has two pressure relief valves 112.

[0041] When a battery cell 111 has multiple pressure relief valves 112, the multiple pressure relief valves 112 can be located on the same end face or different end faces of the battery cell 111. In one application scenario, each battery cell 111 has two pressure relief valves 112, which are respectively located on two opposite end faces of the battery cell 111. In another application scenario, each battery cell 111 has two pressure relief valves 112, which are both located on the same end face of the battery cell 111, and the two pressure relief valves 112 are spaced apart, for example, spaced apart in the vertical direction, or spaced apart in the left-right direction, or spaced apart in other directions.

[0042] Due to factors such as density and mass, even if the gas-liquid mixture is ejected instantaneously from the pressure relief valve 112, the liquid, being denser and heavier, will lose its horizontal or upward kinetic energy under the influence of gravity and thus sink downwards. Meanwhile, the gas, being less dense and lighter, will maintain its original flow direction or rise upwards. Since both channels in the double-layered flow channel are connected to the same pressure relief valve 112, the gas will preferentially enter the upper channel, while the liquid flows into the lower channel, thus achieving gas-liquid separation. In this case, one channel in the double-layered flow channel is used to collect gas, increasing the flow velocity of the gas and liquid within their respective channels and preventing blockages.

[0043] According to some embodiments of this application, please refer to Figure 3 , Figure 4 and Figure 12 The first explosion relief mechanism 12 includes a main body 121 and an isolation plate 122. The main body 121 has an accommodating space, and the isolation plate 122 is disposed in the accommodating space to divide the accommodating space into a double-layer flow channel.

[0044] In one application scenario, the main component 121 is a square tube, and the accommodating space corresponds to a square channel, a cylindrical channel, or other types. In another application scenario, the main component 121 is a cylindrical tube, and the accommodating space corresponds to a cylindrical channel, a square channel, or other types.

[0045] In one application scenario, the isolation plate 122 is a straight plate. In another application scenario, the isolation plate 122 is a curved plate.

[0046] In one application scenario, the channel dimensions and shapes of the two channels in the double-layer flow channel are jointly determined by the accommodating space, the shape of the partition plate 122, and the position of the partition plate 122 within the accommodating space. The dimensions and shapes of the two channels in the double-layer flow channel may be the same or different. In one application scenario, the partition plate 122 is a straight plate, and the accommodating space of the main body 121 corresponds to a square channel. The partition plate 122 is set within the square channel, dividing the square channel into two square sub-channels. These two square sub-channels constitute the double-layer flow channel. When the extending direction of the partition plate 122 is parallel to the axial direction of the square channel, the two square sub-channels have the same shape, but their dimensions may be the same or different. In one application scenario, the partition plate 122 is a curved plate, and the accommodating space of the main component 121 corresponds to a square channel. The partition plate 122 is set in the square channel, dividing the square channel into two square sub-channels. These two square sub-channels form a double-layer flow channel. When the shape of the partition plate 122 is regular, the two square sub-channels have the same shape and the same or different size. When the shape of the partition plate 122 is irregular, the shape and size of the two square sub-channels are different.

[0047] According to some embodiments of this application, please refer to Figure 3 , Figure 4 and Figure 12 The double-layer flow channel includes a first flow channel 123 and a second flow channel 124 arranged along a first direction X1, and both the first flow channel 123 and the second flow channel 124 are connected to the same pressure relief valve 112; wherein, the first direction X1 has a vertical component; one of the first flow channels 123 and the second flow channel 124 is used to collect gas, and the other flow channel is used to collect liquid.

[0048] Specifically, the first direction X1 forms an angle with the vertical direction, which can be a right angle or an acute angle. When the angle is a right angle, the first direction X1 is parallel to the vertical direction, and the first flow channel 123 and the second flow channel 124 are arranged along the vertical direction. When the angle is an acute angle, the first direction X1 is inclined relative to the vertical direction, and the first flow channel 123 and the second flow channel 124 are arranged along the direction inclined to the vertical direction, with the first flow channel 123 and the second flow channel 124 exhibiting characteristics of being higher at one end and lower at the other.

[0049] The first direction X1 is related to the location of the multiple pressure relief valves 112. In one application scenario, the multiple pressure relief valves 112 are located on the same horizontal plane, and the horizontal plane is perpendicular to the vertical direction. In this case, the first direction X1 is perpendicular to the horizontal plane, that is, the first direction X1 is parallel to the vertical direction.

[0050] Because the gas and liquid in the gas-liquid mixture have different masses and densities, when the gas-liquid mixture is released from the pressure relief valve 112, in the vertical direction, the gas in the gas-liquid mixture will move upward, while the liquid in the gas-liquid mixture will sink downward under the action of gravity, thus achieving gas-liquid separation. Based on this, in the vertical direction, the upper channel of the first flow channel 123 and the second flow channel 124 is used to collect gas, and the lower channel of the first flow channel 123 and the second flow channel 124 is used to collect liquid. Specifically, when the first flow channel 123 is above the second flow channel 124, the first flow channel 123 is used to collect gas, and the second flow channel 124 is used to collect liquid; when the first flow channel 123 is below the second flow channel 124, the first flow channel 123 is used to collect liquid, and the second flow channel 124 is used to collect gas.

[0051] According to some embodiments of this application, please refer to Figures 1-2 , Figures 5-6 , Figure 14 and Figures 17-18 The first flow channel 123 and the second flow channel 124 are connected to the pressure relief valves 112 of at least two battery cells 111 arranged along the second direction X2, and the first direction X1 is perpendicular to the second direction X2.

[0052] The arrangement direction of the multiple battery cells 111 is the same as the arrangement direction of the corresponding multiple pressure relief valves 112, that is, the multiple pressure relief valves 112 are arranged along the second direction X2.

[0053] In some embodiments, the second direction X2 is parallel to the left and right direction, and a plurality of cells 111 are arranged in the left and right direction. At this time, the first flow channel 123 and the second flow channel 124 are arranged in the vertical direction, the extension direction of the first flow channel 123 and the second flow channel 124 is parallel to the second direction X2, and the first flow channel 123 and the second flow channel 124 extend in the left and right direction.

[0054] In some embodiments, the second direction X2 is parallel to the vertical direction, and a plurality of cells 111 are stacked and arranged in the vertical direction. At this time, the first flow channel 123 and the second flow channel 124 are arranged in the vertical direction, the extension direction of the first flow channel 123 and the second flow channel 124 is parallel to the second direction X2, and the first flow channel 123 and the second flow channel 124 extend in the left and right direction.

[0055] It is understandable that, compared to the scheme of stacking multiple cells 111 in the vertical direction, arranging multiple cells 111 in the left and right direction can avoid squeezing between adjacent cells 111.

[0056] According to some embodiments of this application, please refer to Figure 5 , Figure 17 and Figure 18The battery device 100 further includes at least one second explosion relief mechanism 20, each second explosion relief mechanism 20 being connected to the double-layer flow channel of the first explosion relief mechanism 12 in at least one battery module 10, the second explosion relief mechanism 20 being used to receive the fluid after gas-liquid separation from the first explosion relief mechanism 12 and to discharge the fluid after gas-liquid separation from the battery device 100.

[0057] The number of second explosion-proof mechanisms 20 can be set according to actual conditions, such as one, two, or others, and is not limited here. In one application scenario, the second explosion-proof mechanism 20 corresponds one-to-one with the battery module 10. In another application scenario, pressure relief valves 112 are respectively provided on both opposite sides of the battery cell 111. The pressure relief valves 112 on both opposite sides of the battery cell 111 are respectively connected to the first explosion-proof mechanism 12. The battery device 100 includes two second explosion-proof mechanisms 20, and these two second explosion-proof mechanisms 20 are respectively connected to the first explosion-proof mechanism 12.

[0058] Due to the difference in density between gas and liquid, gas rises and liquid sinks, resulting in different emission paths for the gas and liquid. In some embodiments, to achieve the emission of both gas and liquid, the battery device 100 further includes at least one collection box 30, which is correspondingly arranged with the second explosion venting mechanism 20. The collection box 30 is used to collect the liquid (typically electrolyte) after gas-liquid separation from the first explosion venting mechanism 12. The gas after gas-liquid separation can be directly discharged from the battery device 100 through the second explosion venting mechanism 20, i.e., direct gas discharge.

[0059] In some embodiments, the second explosion relief mechanism 20 has a flow channel, and the flow channel of the second explosion relief mechanism 20 has a vertical component.

[0060] According to some embodiments of this application, please refer to Figure 5 , Figure 17 and Figure 18 The second explosion relief mechanism 20 includes a third flow channel 21, which is connected to both flow channels in the double-layer flow channel, and the extension direction of the third flow channel 21 is perpendicular to the extension direction of the double-layer flow channel. Alternatively, the extension direction of the third flow channel 21 intersects the extension direction of the double-layer flow channel. In this case, the first flow channel 123 and the second flow channel 124 exhibit a characteristic of being higher at one end and lower at the other. In order to facilitate the smooth entry of the fluid flowing in the first flow channel 123 and the second flow channel 124 into the third flow channel 21, it is required that the lower end of the first flow channel 123 and the second flow channel 124 is connected to the third flow channel 21.

[0061] Because the fluids collected in the first flow channel 123 and the second flow channel 124 are not pure, when gas is mixed in the flow channel used for collecting liquid, secondary gas-liquid separation will occur in the flow channel. Similarly, when liquid is mixed in the flow channel used for collecting gas, secondary gas-liquid separation will also occur in the flow channel.

[0062] Because gas and liquid have different masses and densities, their emission paths differ. To achieve separate emission of both, the third flow channel 21 must not have a separating structure; that is, the third flow channel 21 is a straight-through flow channel. In this case, the gas-liquid separated fluids discharged through the double-layer flow channels can converge in the third flow channel 21 and separate according to the rule that gas rises and liquid sinks. When gas is mixed in the flow channel used for collecting liquid, the fluid flowing into the third flow channel 21 from that flow channel includes upward-floating gas and downward-sinking liquid. Similarly, when liquid is mixed in the flow channel used for collecting gas, the fluid flowing into the third flow channel 21 from that flow channel includes upward-floating gas and downward-sinking liquid.

[0063] In some embodiments, the extension direction of the double-layer flow channel is parallel to the second direction X2, while the second direction X2 is perpendicular to the first direction X1. In this case, the extension direction of the third flow channel 21 is parallel to the first direction X1. In some embodiments, the extension direction of the third flow channel 21 is vertical.

[0064] In some embodiments, the third flow channel 21 corresponds one-to-one with the double-layer flow channel, with one third flow channel 21 connecting to one double-layer flow channel. However, this arrangement is costly, and the number of third flow channels 21 increases with the number of double-layer flow channels, occupying a large amount of internal space in the battery device 100, resulting in a bulky battery device 100 and preventing miniaturization. Therefore, in order to save costs and achieve miniaturization, according to some embodiments of this application, the third flow channel 21 is connected to the double-layer flow channels of multiple first explosion relief mechanisms 12.

[0065] Because flammable gases such as CO, H2, and oxygen are present in the double-layered flow channel, these gases pose a risk of ignition within the flow channel. To address the problem of gas explosion in the flow channel, some embodiments of this application are described below. Figure 4 At least one of the double-layered flow channels is provided with an encapsulation layer 125 to form a placement groove 126 in the flow channel. The placement groove 126 is used to place reactants for reacting with the fluid released by the pressure relief valve 112.

[0066] The first flow channel 123 and / or the second flow channel 124 are provided with an encapsulation layer 125 and reactants. Since the reactants only react with the gas in the fluid and not with the liquid, and the liquid can even cause the reactants to become damp and unable to react with the gas, the reactants hinder the flow of liquid in the flow channel. To achieve both flame retardancy and smooth fluid flow, the encapsulation layer 125 and reactants are only provided in the flow channels 123 and 124 used for gas collection. Specifically, when the first flow channel 123 is used for gas collection, the encapsulation layer 125 and reactants are provided in the first flow channel 123, while no encapsulation layer 125 and reactants are provided in the second flow channel 124. When the second flow channel 124 is used for gas collection, the encapsulation layer 125 and reactants are provided in the second flow channel 124, while no encapsulation layer 125 and reactants are provided in the first flow channel 123.

[0067] However, in practical applications, the fluids collected by the first flow channel 123 and the second flow channel 124 are not pure (i.e., both gas and liquid are present). In order to treat the residual gas, even if the first flow channel 123 is used to collect liquid, an encapsulation layer 125 and reactants can be provided inside the first flow channel 123; similarly, even if the second flow channel 124 is used to collect liquid, an encapsulation layer 125 and reactants can be provided inside the second flow channel 124. In other words, an encapsulation layer 125 and reactants are provided inside both the first flow channel 123 and the second flow channel 124.

[0068] Since the fluids collected in the first flow channel 123 and the second flow channel 124 are not pure, the encapsulation layer 125 can protect the reactants placed in the placement tank 126, preventing them from becoming damp and ineffective. Furthermore, the encapsulation layer 125 has a low ignition point. Because the fluid released by the pressure relief valve 112 is at a high temperature, it can quickly melt the encapsulation layer 125 upon contact, allowing the fluid to react with the reactants encapsulated by the encapsulation layer 125.

[0069] In some embodiments, the encapsulation layer 125 includes a PE film, also known as a polyethylene film, which has a low ignition point. When the fluid comes into contact with the PE film, the PE film can be melted rapidly, allowing the fluid to come into contact with the reactants, and the reactants are triggered by the high-temperature fluid.

[0070] In some embodiments, the reactant is a flame retardant, which refers to a substance or material that has the property of preventing, delaying or inhibiting the spread of flames. Examples include aluminum hydroxide (ATH), phosphorus-based flame retardants, and antimony trioxide.

[0071] In one application scenario, to achieve the automatic triggering function, the flame retardant must be a self-triggering flame retardant. The self-triggering flame retardant uses strontium nitrate (Sr(NO3)2) as an oxidant and dicyandiamide (C2H4N4) as a reducing agent, with the addition of a modified catalyst. This modified catalyst can rapidly and reliably activate (i.e., self-trigger) upon encountering a flame or reaching a specific temperature, undergoing a redox reaction that produces large amounts of nitrogen, carbon dioxide, water vapor, and solid particles (mainly strontium carbonate or strontium oxide dust). The nitrogen, carbon dioxide, water vapor, and solid particles can rapidly reduce the concentration of combustible gases in the flow channel, lowering it to the lower flammability limit. Furthermore, the evaporation of water vapor can simultaneously absorb heat and lower the temperature, and the solid particles covering the metal surface can reduce the possibility of electrical sparks from charged components igniting combustible gases. Specifically, nitrogen, as an inert gas, rapidly reduces the oxygen content around the fire source and in the combustion zone after being released in large quantities, causing the combustion to extinguish due to lack of oxygen; carbon dioxide is also an inert gas that can isolate oxygen, and at the same time, the expansion and heat absorption accompanying the release of high-pressure gas has a certain cooling effect; water vapor can absorb a large amount of heat, reduce the flame temperature, and the expansion of water vapor can displace air; solid particles (dust) can disperse in the flame area and adhere to the surface of the burning material, forming a membrane that prevents oxygen from contacting the fuel, thereby interrupting the chain reaction of combustion.

[0072] The placement tank 126 of this application is a flow channel, and it is a part of the corresponding flow channel. The size of the placement tank 126 can correspond to the volume of the reactants to ensure that the space for fluid flow is large enough.

[0073] To protect the reactants and facilitate reaction with the fluid, the extension direction of the encapsulation layer 125 intersects the fluid release direction. In one application scenario, the extension direction of the encapsulation layer 125 is perpendicular to the fluid release direction. In another application scenario, the extension direction of the encapsulation layer 125 is parallel to a first direction X1 or parallel to the perpendicular component of the first direction X1.

[0074] Since gases such as CO, H2, and oxygen may still be present in the third flow channel 21, and these gases pose a risk of ignition, in order to solve the problem of gas explosion in the third flow channel 21, according to some embodiments of this application, please refer to... Figures 17-18 The battery device 100 also includes an exhaust flame arrester 40, which is a safety device installed at the port of the third flow channel 21 or at the exhaust port of the battery device 100. The exhaust flame arrester 40 has an exhaust channel, one end of which is connected to one end of the third flow channel 21 and the other end of which is connected to the outside of the battery device 100; the exhaust channel is used to cool the gas flowing in from the third flow channel 21 below its ignition point.

[0075] To achieve the gas cooling effect of the exhaust flame arrestor 40, following the principle of gas rising and liquid sinking, the exhaust flame arrestor 40 needs to be installed at a port on the third flow channel 21 that can contact the gas. In one application scenario, the third flow channel 21 extends vertically, with the exhaust flame arrestor 40 positioned at the upper end of the third flow channel 21, and the collection box 30 positioned at the lower end of the third flow channel 21. When the gas flows into the exhaust channel from the third flow channel 21, the exhaust flame arrestor 40 can absorb heat, passively cooling the gas below its ignition point.

[0076] In some embodiments, the exhaust flame arrestor 40 includes at least one exhaust flame arrestor mesh, also known as a flame arrester, fireproof mesh, or spark arrester, which has at least one exhaust passage. The exhaust passage can be a duct, grid, louver, or other, and is not limited herein.

[0077] In some embodiments, in order to prevent solid particles generated by the oxidation-reduction reaction mentioned above from clogging the exhaust passage, a protective film can be provided on the side of the exhaust flame arrestor 40 that is connected to the third flow channel 21. Gas can only enter the exhaust passage of the exhaust flame arrestor 40 after passing through the protective film, while solid particles will be intercepted by the protective film.

[0078] According to some embodiments of this application, please refer to Figure 4 and Figures 6-13 The battery module 10 also includes a sealing component 13, which is disposed between the module body 11 and the first explosion relief mechanism 12. The sealing component 13 has a connection hole 131. One end of the sealing component 13 is sealed to the corresponding battery cell 111, and one end of the connection hole 131 is connected to the corresponding pressure relief valve 112. The other end of the sealing component 13 is sealed to the first explosion relief mechanism 12, and the other end of the connection hole 131 is connected to the corresponding through hole 127 on the first explosion relief mechanism 12. The through hole 127 is connected to the double-layer flow channel. The connection hole 131 is used to guide the fluid released by the pressure relief valve 112 to the double-layer flow channel.

[0079] A sealed connection refers to a connection established between two objects that prevents the leakage or ingress of gases, liquids, dust, or other substances. A sealed connection can be achieved by the deformation and compression of the two objects themselves. Examples include threaded connections that seal by the deformation and compression of the threads themselves; frictional connections that seal by mutual contact and pressure; compression connections that achieve a tight fit through clamping deformation; and fusion connections that melt and fuse materials through heating, followed by cooling to form a single, integrated seal. There are no limitations on this. Sealed connections can also be achieved using additional sealing components such as gaskets and sealants.

[0080] In some embodiments, the sealing assembly 13 is detachably connected to the first pressure relief mechanism 12, and the sealing assembly 13 is detachably connected to the pressure relief valve 112 of the battery cell 111. Detachable connections include, but are not limited to, threaded connections, keyed connections, pin connections, shaft connections, and elastic connections.

[0081] The first explosion relief mechanism 12 has at least one through hole 127. The through hole 127 corresponds one-to-one with the pressure relief valve 112 and one-to-one with the connection hole 131 of the sealing assembly 13.

[0082] The sealing assembly 13 serves as an intermediary between the module body 11 and the first pressure relief mechanism 12. In addition to sealing, it can also guide flow. Specifically, the fluid released by the pressure relief valve 112 flows into the corresponding connection hole 131, and then enters the double-layer flow channel from the connection hole 131 through the corresponding through hole 127.

[0083] The axial direction of the connecting hole 131 in the sealing assembly 13 is parallel to the arrangement direction of the module body 11 and the first explosion relief mechanism 12. To ensure that the gas-liquid mixture does not separate within the connecting hole 131 of the sealing assembly 13, the axial dimension of the connecting hole 131 is required to be less than or equal to a preset value, such as 3mm, 4mm, 5mm, or 6mm. When the axial dimension of the connecting hole 131 is greater than the preset value, the gas-liquid mixture is ejected from the pressure relief valve 112. After entering the connecting hole 131 and before entering the through hole 127, there is a tendency for the liquid to settle downwards and the gas to maintain its original flow direction or rise upwards, that is, gas-liquid separation is achieved within the sealing assembly 13.

[0084] The shape and size of the connecting hole 131 can be determined according to actual conditions. For example, the shape of the connecting hole 131 includes, but is not limited to, round holes, near-round holes, and square holes. The shape and size of the through hole 127 can also be determined according to actual conditions. For example, the shape of the through hole 127 includes, but is not limited to, round holes, near-round holes, and square holes. The shape and size of the connecting hole 131 may be the same as or different from the shape and size of the through hole 127. It can be understood that the main body 121 has a certain thickness, and the through hole 127 provided thereon also has a certain thickness. During the flow of the fluid discharged by the pressure relief valve 112 through the through hole 127, gas-liquid separation can be performed, so that the gas-liquid separated fluid after passing through the through hole 127 flows directly into the corresponding flow channel. The thickness of the main body 121 can be set according to the actual situation. For example, when a sealing component 13 is provided between the module body 11 and the first explosion relief mechanism 12, the thickness of the main body 121 can be as small as possible, thereby making the axial dimension of the through hole 127 small; when no sealing component 13 is provided between the module body 11 and the first explosion relief mechanism 12, the thickness of the main body 121 can be appropriately larger, thereby making the axial dimension of the through hole 127 larger than the corresponding dimension when the sealing component 13 is provided.

[0085] According to some embodiments of this application, please refer to Figure 4 and Figures 6-13 The sealing assembly 13 includes at least one elastic element 132, which has at least one connection hole 131; one end of the elastic element 132 is sealed to the battery cell 111, and the other end of the elastic element 132 is sealed to the first explosion relief mechanism 12.

[0086] In some embodiments, the sealing assembly 13 includes an elastic element 132 having a connection hole 131, adapted to a situation where there is only one first venting mechanism 12, a through hole 127 and a pressure relief valve 112.

[0087] In some embodiments, the sealing assembly 13 includes an elastic element 132 having at least two connection holes 131, adapted to a situation with only one first venting mechanism 12, two through holes 127 and two pressure relief valves 112.

[0088] In some embodiments, the sealing assembly 13 includes at least two elastic elements 132, each elastic element 132 having a connection hole 131, suitable for a situation where there is only one first explosion relief mechanism 12, at least two pressure relief valves 112 and the first explosion relief mechanism 12 has at least two through holes 127, or suitable for a situation where there are at least two first explosion relief mechanisms 12, at least two pressure relief valves 112 and each first explosion relief mechanism 12 has a through hole 127.

[0089] In some embodiments, the sealing assembly 13 includes at least two elastic elements 132, each elastic element 132 having at least two connection holes 131, adapted to a situation where there is only one first explosion relief mechanism 12, at least four pressure relief valves 112, and the first explosion relief mechanism 12 has at least four through holes 127; or, adapted to a situation where there are at least two first explosion relief mechanisms 12, at least four pressure relief valves 112, and the first explosion relief mechanism 12 has at least one through hole 127. It is understood that, in the case of at least two first explosion relief mechanisms 12, taking the presence of two first explosion relief mechanisms 12 as an example, when one first explosion relief mechanism 12 has one through hole 127, the other first explosion relief mechanism 12 has three through holes 127; when one first explosion relief mechanism 12 has two through holes 127, the other first explosion relief mechanism 12 has two through holes 127.

[0090] According to some embodiments of this application, please refer to Figure 7-8 The elastic element 132 includes an elastic sealing ring 1321, and the sealing assembly 13 also includes a support element 133. The support element 133 surrounds the outer peripheral surface of the elastic sealing ring 1321 and abuts against both ends of the elastic sealing ring 1321. The two ends of the elastic sealing ring 1321 are respectively used for sealing connection with the battery cell 111 and the first explosion relief mechanism 12.

[0091] The elastic sealing ring 1321 has a connecting hole 131. The elastic sealing ring 1321 is a ring-shaped component made of elastic material (such as rubber, silicone, etc.), which can be filled between two or more components. It generates contact pressure through the elastic deformation of the material itself, thereby preventing fluid leakage and preventing external contaminants such as dust and moisture from entering the interior.

[0092] The support member 133 is made of a material with higher hardness and stronger extrusion resistance than the elastic sealing ring 1321 (such as a polytetrafluoroethylene retaining ring). The support member 133 can be a rigid or semi-rigid metal ring, a plastic retaining ring, a flange sleeve with a tightening function, or a Bourdon tube; there are no restrictions here.

[0093] The support member 133 is tightly attached to the low-pressure side outer peripheral surface of the elastic sealing ring 1321 (the inner side of the elastic sealing ring 1321 transmits high-pressure fluid and is the high-pressure side inner peripheral surface). The support member 133 can provide support force to the side of the elastic sealing ring 1321 to prevent the elastic sealing ring 1321 from twisting, sagging or loosening under high pressure. The support member 133 abuts against both ends of the elastic sealing ring 1321. The two ends of the elastic sealing ring 1321 can exert force on the contact points with the battery cell 111 and the first explosion relief mechanism 12 under the action of the force applied by the support member 133, thereby improving the sealing effect between the elastic sealing ring 1321 and the battery cell 111 and the first explosion relief mechanism 12.

[0094] In addition, the outer peripheral surface of the elastic sealing ring 1321 abuts against both ends of the elastic sealing ring 1321, and the support member 133 is disposed between the two ends of the elastic sealing ring 1321, which can limit the position of the support member 133.

[0095] According to some embodiments of this application, please refer to Figures 9-11 The support member 133 includes an elastic support member 1331 having the ability to deform axially along the elastic sealing ring 1321.

[0096] The axial direction of the elastic sealing ring 1321 is parallel to the arrangement direction of the battery cell 111 and the first explosion relief mechanism 12. The elastic support member 1331 has the ability to deform along the axial direction of the elastic sealing ring 1321, and can deform along the axial direction without twisting, sagging or loosening, so that the deformation of the elastic support member 1331 between the battery cell 111 and the first explosion relief mechanism 12 will not affect the sealing effect.

[0097] Among them, the elastic support component 1331 includes, but is not limited to, O-rings, wave springs, elastic washers, foamed elastomers, and sponge rubber.

[0098] According to some embodiments of this application, please refer to Figure 10The elastic sealing ring 1321 has double lips 201 at both ends, and the support member 133 is located between the two double lips 201. The two double lips 201 face opposite directions. One of the two double lips 201 is used to seal and connect with the battery cell 111, and the other double lip 201 is used to seal and connect with the first explosion relief mechanism 12.

[0099] In some embodiments, the elastic sealing ring 1321 includes an annular body 202, and the two ends of the annular body 202 are respectively provided with double lips 201.

[0100] Each double lip 201 has two lip openings (also known as sealing edges), namely a main lip and a secondary lip. The main lip is primarily responsible for sealing the internal fluid to prevent leakage, while the secondary lip, located outside the main lip, is mainly responsible for preventing external impurities such as dust, dirt, and moisture from entering the elastic sealing ring 1321. Compared to a seal with only one lip, the double-lip structure has better leak-proof and dust-proof capabilities, achieving dual protection.

[0101] The annular body 202 and the double lip 201 are integrally formed or detachably connected. Detachable connection methods include, but are not limited to, snap-fit ​​connection, threaded connection, and interference fit connection. In one application scenario, one end of the annular body 202 has an annular protrusion, and the double lip 201 has an annular groove 2011 that mates with the annular protrusion. The annular protrusion can be inserted into the annular groove 2011 to achieve a snap-fit ​​connection. In another application scenario, one end of the annular body 202 has a first threaded structure, and the double lip 201 has a second threaded structure that mates with the first threaded structure. The second threaded structure engages with the first threaded structure to achieve a threaded connection. The first threaded structure is an external thread, and the second threaded structure is an internal thread, or vice versa.

[0102] According to some embodiments of this application, please refer to Figure 10 The double lip portion 201 includes a first protrusion 203 and a second protrusion 204 arranged axially at intervals along the elastic sealing ring 1321. The first protrusion 203 and the second protrusion 204 are both annular ridges that extend radially inward or outward from the inner circumferential surface of the annular body 202 in the elastic sealing ring 1321.

[0103] In some embodiments, the first protrusion 203 corresponds to the main lip and the second protrusion 204 corresponds to the secondary lip, or the first protrusion 203 corresponds to the secondary lip and the second protrusion 204 corresponds to the main lip. The radial dimension of the main lip is larger than that of the secondary lip; a larger radial dimension results in more interference and a better sealing effect.

[0104] According to some embodiments of this application, please refer to Figures 12-13The elastic element 132 includes a flexible tube 1322 and an interface element 1323; one end of the interface element 1323 is sealed to the pressure relief valve 112 of the corresponding battery cell 111, the other end of the interface element 1323 is sealed to one end of the flexible tube 1322, and the other end of the flexible tube 1322 is sealed to the first explosion relief mechanism 12.

[0105] In some embodiments, the flexible tube 1322 includes, but is not limited to, rubber hoses, plastic hoses, and metal hoses. The flexible tube 1322 includes, but is not limited to, corrugated pipes, composite hoses, and threaded pipes.

[0106] In some embodiments, the interface 1323 includes, but is not limited to, quick-connect fittings, compression fittings, threaded fittings, and hose fittings. In one application scenario, the interface 1323 has a third threaded structure, the two ends of the flexible tube 1322 have fourth threaded structures, and the first explosion relief mechanism 12 has a fifth threaded structure. The fourth threaded structure engages with the third threaded structure, and the fifth threaded structure engages with the fourth threaded structure to achieve a threaded connection. In this configuration, the third and fifth threaded structures are external threads, and the fourth threaded structure is an internal thread; or, the third and fifth threaded structures are internal threads, and the fourth threaded structure is an external thread; or, the third threaded structure is an external thread, the fifth threaded structure is an internal thread, the fourth threaded structure on the flexible tube 1322 that meshes with the third threaded structure is an internal thread, and the fourth threaded structure on the flexible tube 1322 that meshes with the fifth threaded structure is an external thread; or, the third threaded structure is an internal thread, the fifth threaded structure is an external thread, the fourth threaded structure on the flexible tube 1322 that meshes with the third threaded structure is an external thread, and the fourth threaded structure on the flexible tube 1322 that meshes with the fifth threaded structure is an internal thread.

[0107] In some embodiments, see Figure 13 The interface component 1323 includes a first connecting surface 205, a second connecting surface 206, and a third connecting surface 207. The first connecting surface 205 is an inner channel surface. The second connecting surface 206 is used to abut against the battery cell 111 so that the fluid released by the pressure relief valve 112 of the battery cell 111 can pass through the channel formed by the first connecting surface 205. The third connecting surface 207 is an outer mounting surface, which is used to seal and connect with one end of the flexible tube 1322. In one application scenario, the third connecting surface 207 is provided with a third thread structure.

[0108] In some embodiments, see Figure 12The other end of the flexible tube 1322 has a connector 22 for a sealed connection with the first explosion venting mechanism 12. The connector 22 is integrally formed with or detachably connected to the flexible tube 1322; alternatively, the first explosion venting mechanism 12 has a connector 22 for a sealed connection with the flexible tube 1322. The connector 22 is also integrally formed with or detachably connected to the flexible tube 1322. In one application scenario, the connector 22 has a fifth thread structure.

[0109] According to some embodiments of this application, please refer to Figure 4 The elastic element 132 includes a sealing plate 1324, which has a plurality of connection holes 131. In some embodiments, the sealing plate 1324 includes a graphene sealing sheet or a silicone foam sealing sheet with connection holes 131. Both the graphene sealing sheet and the silicone foam sealing sheet have compression resilience, allowing them to conform to uneven flange surfaces and rebound quickly without collapsing, thus maintaining a sustained sealing pressure. The graphene sealing sheet has a higher hardness than the silicone foam sealing sheet.

[0110] According to some embodiments of this application, the battery module 10 further includes an adhesive layer, which is adhesive and disposed between the first explosion venting mechanism 12 and the sealing assembly 13 to fix the first explosion venting mechanism 12 and the sealing assembly 13. Specifically, when the elastic member 132 includes a sealing plate 1324, the adhesive layer is disposed between the first explosion venting mechanism 12 and the sealing plate 1324 to fix the first explosion venting mechanism 12 and the sealing plate 1324.

[0111] In this application, since the adhesive layer is inconvenient to disassemble, in addition to using the adhesive layer to fix the first explosion relief mechanism 12, the pressure plate assembly 14 can also be used to fix the first explosion relief mechanism 12.

[0112] According to some embodiments of this application, please refer to Figures 1-2 , Figures 5-6 The battery module 10 further includes a pressure plate assembly 14, comprising at least one pressure plate 141. The pressure plate 141 is connected to the first explosion venting mechanism 12 and the end plate 16 of the battery module 10 respectively to fix the first explosion venting mechanism 12. When a sealing assembly 13 is present, the pressure plate 141 connects the first explosion venting mechanism 12 and the end plate 16 of the battery module 10, and can also apply force to the sealing assembly 13 to secure it between the first explosion venting mechanism 12 and the pressure relief valve 112 of the battery cell 111.

[0113] The quantity, shape, and size of the pressure plates 141 are determined according to the actual situation and are not limited here. The pressure plates 141 are plate-shaped structures, and their cross-sections include, but are not limited to, square, U-shaped, and X-shaped.

[0114] In some embodiments, the pressure plate 141 is fixedly connected to the first explosion relief mechanism 12, and the connection method includes threaded connection, snap-fit ​​connection or others, which are not limited here.

[0115] In some embodiments, the pressure plate 141 abuts against the first explosion relief mechanism 12, and the two are fixed by applying force to the first explosion relief mechanism 12.

[0116] In some embodiments, the pressure plate 141 is fixedly connected to the end plate 16 of the battery module 10. The connection method includes threaded connection, snap-fit ​​connection or others, which are not limited here.

[0117] In this application, in addition to using the pressure plate assembly 14 to fix the first explosion relief mechanism 12, the locking assembly 15 can also be used to fix the first explosion relief mechanism 12.

[0118] According to some embodiments of this application, please refer to Figures 14-16 The battery module 10 also includes a locking assembly 15, which connects the first explosion relief mechanism 12 and the end plate 16 of the battery module 10. The locking assembly 15 is used to fix the first explosion relief mechanism 12 and control the connection state between the first explosion relief mechanism 12 and the sealing assembly 13. The connection state includes a locked state and an unlocked state.

[0119] The locking assembly 15 refers to a combination of components used to fix, lock, or prevent relative movement (such as rotation, sliding, or disengagement) between the locking assembly 15 and the first explosion relief mechanism 12. To prevent relative movement between the locking assembly 15 and the first explosion relief mechanism 12, the two need to be locked together. The locking method includes, but is not limited to, threaded locking, elastic deformation locking, friction locking, and snap-locking.

[0120] The first explosion-venting mechanism 12 and the sealing assembly 13 have locked and unlocked states. The locking assembly 15 moves the first explosion-venting mechanism 12 toward the sealing assembly 13, sealing the first explosion-venting mechanism 12 and the sealing assembly 13 together in the locked state, preventing relative movement between them. Alternatively, the locking assembly 15 moves the first explosion-venting mechanism 12 away from the sealing assembly 13, separating the first explosion-venting mechanism 12 from the sealing assembly 13 in the unlocked state, allowing the locked sealing assembly 13 to move freely for adjustment, disassembly, or operation.

[0121] According to some embodiments of this application, please refer to Figures 14-16 The locking assembly 15 includes a mounting bracket 151 and at least one locking member 152. The mounting bracket 151 is mounted on the end plate 16 of the battery module 10. One end of the locking member 152 is connected to the mounting bracket 151, and the other end of the locking member 152 is connected to the first explosion relief mechanism 12.

[0122] In some embodiments, the mounting bracket 151 can be a single part or an assembly. The mounting bracket 151 is used to fix, support, or position the locking member 152, so that one end of the locking member 152 does not move relative to the mounting bracket 151. In one application scenario, the mounting bracket 151 can be a plate mounting bracket, a cantilever mounting bracket, a frame mounting bracket, a column mounting bracket, or others. The mounting bracket 151 can be a metal mounting bracket, a plastic mounting bracket, or others, and there is no limitation here.

[0123] In some embodiments, the locking element 152 refers to a component that can be fixed relative to the first venting mechanism 12 by means of mechanical deformation, friction, or mechanical obstruction, and prevents relative movement between them due to vibration or other reasons. In one application scenario, the locking element 152 can be a threaded locking element, a washer locking element, a retaining ring locking element, or others, and there is no limitation herein.

[0124] In some embodiments, the mounting bracket 151 is detachably connected to the end plate 16 of the battery module 10. The locking member 152 is detachably connected to the mounting bracket 151. The locking member 152 is detachably connected to the first explosion relief mechanism 12. The detachable connections include, but are not limited to, threaded connections, keyed connections, pin connections, shaft connections, and resilient connections.

[0125] In some embodiments, the locking member 152 moves the first explosion venting mechanism 12 toward the sealing assembly 13, sealing the first explosion venting mechanism 12 and the sealing assembly 13 together in a locked state, preventing relative movement between the first explosion venting mechanism 12 and the sealing assembly 13. The locking member 152 also moves the first explosion venting mechanism 12 away from the sealing assembly 13, separating the first explosion venting mechanism 12 from the sealing assembly 13 in an unlocked state, allowing the locked sealing assembly 13 to move freely for adjustment, disassembly, or operation.

[0126] According to some embodiments of this application, please refer to Figures 15-16 The locking member 152 includes a first connecting part 1521, a second connecting part 1522, a connecting rod assembly 1523, and an active member 1524.

[0127] The first end of the first connecting portion 1521 is connected to the mounting bracket 151. The first end of the second connecting portion 1522 is connected to the first explosion venting mechanism 12, and the second end of the second connecting portion 1522 is connected to the first connecting portion 1521. One end of the connecting rod assembly 1523 is pivotally connected to the first connecting portion 1521, and the other end of the connecting rod assembly 1523 is pivotally connected to the third end of the second connecting portion 1522. The driving member 1524 is connected to the connecting rod assembly 1523 and can move relative to the mounting bracket 151. When the driving member 1524 moves, it drives the second connecting portion 1522 and the first explosion venting mechanism 12 connected thereto to move relative to the sealing assembly 13 through the connecting rod assembly 1523, so that the first explosion venting mechanism 12 is sealed to or separated from the sealing assembly 13. The pivotal connection can be a hinge, a pin connection, or other methods.

[0128] In some embodiments, in order to achieve a fixed connection between the first connecting part 1521 and the mounting bracket 151, the first connecting part 1521 also has a pressure nozzle 1525, also known as a pressure head, pressure block or clamp, which can directly contact the mounting bracket 151 being pressed and apply pressure to it.

[0129] In some embodiments, in order to achieve a fixed connection between the second connecting part 1522 and the first explosion relief mechanism 12, the second connecting part 1522 also has a pressure nozzle 1525, which can directly contact the first explosion relief mechanism 12 being pressed and apply pressure to it.

[0130] In some embodiments, the linkage assembly 1523 includes linkages, and the number of linkages is greater than or equal to 2, depending on the actual situation, and is not limited here.

[0131] In one application scenario, the linkage includes a first linkage 23 and a second linkage 24. The first end of the first linkage 23 is pivotally connected to the first connecting part 1521, and the second end of the first linkage 23 is connected to the first end of the second linkage 24. The second end of the second linkage 24 is pivotally connected to the third end of the second connecting part 1522. The driving member 1524 is simultaneously connected to the second end of the first linkage 23 and the first end of the second linkage 24. When the driving member 1524 moves, it drives the first linkage 23 and the second linkage 24 to move. Since the first end of the first linkage 23 is connected to the fixed mounting bracket 151, the mounting bracket 151 will not move with the movement of the first linkage 23. However, the second linkage 24 is connected to the third end of the second connecting part 1522, and the second connecting part 1522 will move with the movement of the second linkage 24. This, in turn, drives the first explosion relief mechanism 12, which is fixedly connected to the second connecting part 1522, to move, causing the first explosion relief mechanism 12 to be sealed to or separated from the sealing assembly 13.

[0132] In other application scenarios, the linkage may include other rods in addition to the first linkage 23 and the second linkage 24, depending on the actual situation. No restrictions are imposed here.

[0133] In some embodiments, the active component 1524 includes an operation panel 25 and a pressure rod 26. One end of the pressure rod 26 is connected to the linkage assembly 1523, and the other end of the pressure rod 26 is connected to the operation panel 25. The operation panel 25 is operable. When a user or a driving device applies force to it, the operation panel 25 drives the pressure rod 26 to move. The pressure rod 26 is connected to the linkage assembly 1523. Under the drive of the pressure rod 26, the linkage assembly 1523 drives the first explosion relief mechanism 12, which is fixedly connected to it, to move through the second connecting part 1522, so that the first explosion relief mechanism 12 is sealed to or separated from the sealing assembly 13.

[0134] In one application scenario, one end of the pressure rod 26 is connected to the second end of the first connecting rod 23 and the first end of the second connecting rod 24. The operation panel 25 is operable. When a user or driving device applies force to it, the operation panel 25 drives the pressure rod 26 to move. The pressure rod 26 is connected to the first connecting rod 23 and the second connecting rod 24. Under the drive of the pressure rod 26, the first connecting rod 23 and the second connecting rod 24 drive the first explosion relief mechanism 12, which is fixedly connected to it, to move through the second connecting part 1522, so that the first explosion relief mechanism 12 is sealed to or separated from the sealing assembly 13.

[0135] According to some embodiments of this application, please refer to Figure 1-2 , Figure 6 and Figure 14 The end plate 16 of the battery module 10 includes an upper left plate 161, an upper right plate 162, a lower left plate 163, a lower right plate 164, a first side plate 165, and a second side plate 166.

[0136] The upper left plate 161 and the upper right plate 162 are spaced apart along a third direction X3, which is perpendicular to the first direction X1 and the second direction X2, respectively.

[0137] The lower left plate 163 and the lower right plate 164 are spaced apart along a third direction X3, and the lower left plate 163 and the upper left plate 161 are spaced apart along a first direction X1, and the lower right plate 164 and the upper right plate 162 are spaced apart along a first direction X1.

[0138] The first side plate 165 is connected to the first end of the upper left plate 161, the first end of the upper right plate 162, the first end of the lower left plate 163, and the first end of the lower right plate 164, respectively. The second side plate 166 is connected to the second end of the upper left plate 161, the second end of the upper right plate 162, the second end of the lower left plate 163, and the second end of the lower right plate 164, respectively.

[0139] The battery cell 111 is disposed within an accommodating space formed by the upper left plate 161, upper right plate 162, lower left plate 163, lower right plate 164, first side plate 165, and second side plate 166. The end plate 16 of the battery module 10 can limit the position of the battery cell 111, and when there are multiple battery modules 10, it can separate the battery cells 111 of adjacent battery modules 10 to reduce heat transfer.

[0140] In some embodiments, the pressure plate 141 is connected to the upper left plate 161 and the lower left plate 163 respectively; or, the pressure plate 141 is connected to the upper right plate 162 and the lower right plate 164 respectively; or, the pressure plate 141 is connected to the first side plate 165 and the second side plate 166 respectively; or, the pressure plate 141 is connected to the upper left plate 161, the lower left plate 163, the first side plate 165 and the second side plate 166 respectively; or, the pressure plate 141 is connected to the upper right plate 162 and the lower right plate 164, the first side plate 165 and the second side plate 166 respectively; or, others, which are not limited here.

[0141] In some embodiments, the mounting bracket 151 is connected to the upper left plate 161 and the lower left plate 163 respectively; or, the mounting bracket 151 is connected to the upper right plate 162 and the lower right plate 164 respectively; or, the mounting bracket 151 is connected to the first side plate 165 and the second side plate 166 respectively; or, the mounting bracket 151 is connected to the upper left plate 161, the lower left plate 163, the first side plate 165 and the second side plate 166 respectively; or, the mounting bracket 151 is connected to the upper right plate 162 and the lower right plate 164, the first side plate 165 and the second side plate 166 respectively; or, others, which are not limited here.

[0142] According to some embodiments of this application, please refer to Figure 14 The battery module 10 further includes at least one heat insulation element 17, which is disposed between two adjacent battery cells 111 to reduce heat transfer between the two adjacent battery cells 111. The heat insulation element 17 includes, but is not limited to, heat insulation gaskets, heat insulation sleeves, heat insulation plates, and heat insulation coatings.

[0143] According to some embodiments of this application, please refer to Figures 17-18 The battery device 100 also includes a cabinet 50, in which the battery module 10 is placed to support and limit the battery module 10.

[0144] According to some embodiments of this application, please refer to Figures 17-18 The battery device 100 also includes a first sensor 51, which is disposed within the housing space of the cabinet 50. The first sensor 51 is used to detect gas H2. The first sensor 51 includes, but is not limited to, one of an electrochemical sensor, a catalytic combustion sensor, a thermal conductivity sensor, a semiconductor sensor, and an optical sensor.

[0145] According to some embodiments of this application, please refer to Figures 17-18 The battery device 100 also includes a second sensor 52, which is disposed within the housing space of the cabinet 50. The second sensor 52 is used to detect gaseous CO. The second sensor 52 includes, but is not limited to, one of an electrochemical sensor, a catalytic combustion sensor, an infrared absorption sensor, and an optical sensor. It is understood that the second sensor 52 can be of the same type as the first sensor 51.

[0146] In some embodiments, such as Figures 17-18 As shown, the first sensor 51 and the second sensor 52 are arranged at intervals along the vertical direction. Specifically, the first sensor 51 is located above the second sensor 52, or the first sensor 51 is located below the second sensor 52.

[0147] According to some embodiments of this application, please refer to Figures 17-18 The battery device 100 also includes an electric spark ignition mechanism 53, which is located within the housing space of the cabinet 50. The electric spark ignition mechanism 53 is an igniter or ignition device that uses power from the battery device 100 to generate an electric spark, which can generate an electric spark through high-voltage discharge to ignite combustible gas.

[0148] In one application scenario, when the sensor detects that the concentration of gas H2 and / or gas CO has reached the explosion limit, the electric spark ignition mechanism 53 will be automatically triggered to burn off these gases in a controlled manner within the battery pack in advance. Controlled combustion (generating high temperature but controllable pressure) is less harmful to surrounding personnel and the structure of the battery device 100 than instantaneous explosion (generating pressure shock wave).

[0149] According to some embodiments of this application, this application provides an electronic device that includes the battery device 100 of any of the above embodiments.

[0150] For the structure of the battery device 100, please refer to the description of any of the above embodiments, which will not be repeated here.

[0151] In some embodiments, the electronic device further includes a processor and memory.

[0152] The processor involved in this application may be referred to as a CPU (Central Processing Unit), which may be an integrated circuit chip, or a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component.

[0153] The memory used in this application includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), or optical discs.

[0154] In some embodiments, the electronic device may be a communication device such as a mobile phone or walkie-talkie; a computer and office device such as a laptop, power bank, wireless mouse / keyboard, or printer; an audio-visual entertainment device such as a digital camera, action camera, handheld game console, or Bluetooth speaker; a mobile device such as an electric car, electric bicycle, balance scooter, or drone; a smart wearable device such as a smartwatch or VR (Virtual Reality) glasses; or others, without limitation.

[0155] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, It includes at least one battery module; wherein each of the battery modules includes: The module body includes at least one battery cell, each of which has a pressure relief valve; At least one first explosion relief mechanism is provided, which is connected to at least one pressure relief valve of the battery cell. The first explosion relief mechanism has a double-layer flow channel, and both flow channels in the double-layer flow channel are connected to the same pressure relief valve. The double-layer flow channel is used to perform gas-liquid separation on the fluid discharged by the pressure relief valve.

2. The battery device according to claim 1, characterized in that, The first explosion relief mechanism includes a main body and an isolation plate. The main body has an accommodating space, and the isolation plate is disposed in the accommodating space to divide the accommodating space into the double-layer flow channel.

3. The battery device according to claim 1 or 2, characterized in that, The dual-layer flow channel includes a first flow channel and a second flow channel arranged along a first direction, and both the first flow channel and the second flow channel are connected to the same pressure relief valve; wherein, the first direction has a vertical component; One of the first and second flow channels is used to collect gas, and the other of the first and second flow channels is used to collect liquid.

4. The battery device according to claim 3, characterized in that, The first flow channel and the second flow channel are connected to at least two pressure relief valves of the battery cells arranged along a second direction, the first direction being perpendicular to the second direction.

5. The battery device according to claim 1, characterized in that, At least one of the double-layered flow channels is provided with an encapsulation layer to form a placement groove within the flow channel. The placement groove is used to place reactants for reacting with the fluid released by the pressure relief valve.

6. The battery device according to claim 1, characterized in that, The battery device also includes: At least one second explosion venting mechanism is provided, which is connected to the double-layer flow channel of the first explosion venting mechanism in at least one of the battery modules. The second explosion venting mechanism is used to receive the gas-liquid separated fluid from the first explosion venting mechanism and to discharge the gas-liquid separated fluid out of the battery device.

7. The battery device according to claim 6, characterized in that, The second explosion relief mechanism includes a third flow channel, which is connected to both flow channels in the double-layer flow channel, and the extension direction of the third flow channel is perpendicular to the extension direction of the double-layer flow channel.

8. The battery device according to claim 7, characterized in that, The third flow channel is connected to the double-layer flow channels of multiple first explosion relief mechanisms.

9. The battery device according to claim 7, characterized in that, The third flow channel extends in a vertical direction.

10. The battery device according to claim 7, characterized in that, The battery device further includes an exhaust flame arrestor mechanism, which has an exhaust channel. One end of the exhaust channel is connected to one end of the third flow channel, and the other end of the exhaust channel is connected to the outside of the battery device. The discharge channel is used to cool the gas flowing in from the third channel, bringing it below its ignition point.

11. The battery device according to claim 1, characterized in that, The battery module also includes: A sealing assembly is disposed between the module body and the first explosion relief mechanism. The sealing assembly has a connection hole. One end of the sealing assembly is sealed to the corresponding battery cell. One end of the connection hole is connected to the corresponding pressure relief valve. The other end of the sealing assembly is sealed to the first explosion relief mechanism. The other end of the connection hole is connected to a corresponding through hole on the first explosion relief mechanism. The through hole is connected to the double-layer flow channel. The connection hole is used to guide the fluid released by the pressure relief valve to the double-layer flow channel.

12. The battery device according to claim 11, characterized in that, The sealing assembly includes at least one elastic element having at least one of the connecting holes; One end of the elastic element is sealed to the battery cell, and the other end of the elastic element is sealed to the first explosion relief mechanism.

13. The battery device according to claim 12, characterized in that, The elastic element includes an elastic sealing ring, and the sealing assembly further includes a support member. The support member surrounds the outer peripheral surface of the elastic sealing ring and abuts against both ends of the elastic sealing ring. The two ends of the elastic sealing ring are respectively used for sealing connection with the battery cell and the first explosion relief mechanism.

14. The battery device according to claim 13, characterized in that, The support member includes an elastic support member having the ability to deform axially along the elastic sealing ring.

15. The battery device according to claim 13, characterized in that, The elastic sealing ring has double lips at both ends, and the support is located between the two double lips, with the two double lips facing opposite directions. One of the two double lips is used for a sealed connection with the battery cell, and the other of the two double lips is used for a sealed connection with the first explosion relief mechanism.

16. The battery device according to claim 15, characterized in that, The double lip portion includes a first protrusion and a second protrusion arranged at intervals along the axial direction of the elastic sealing ring.

17. The battery device according to claim 12, characterized in that, The elastic element includes a flexible tube body and an interface component; One end of the interface component is sealed to the pressure relief valve of the corresponding battery cell, the other end of the interface component is sealed to one end of the flexible tube, and the other end of the flexible tube is sealed to the first explosion relief mechanism.

18. The battery device according to claim 12, characterized in that, The elastic element includes a sealing plate, and the sealing plate is provided with a plurality of the connection holes.

19. The battery device according to claim 18, characterized in that, The sealing plate includes a graphene sealing sheet or a silicone foam sealing sheet with the connection hole.

20. The battery device according to claim 1, characterized in that, The battery module also includes: The pressure plate assembly includes at least one pressure plate, which is connected to the first explosion relief mechanism and the end plate of the battery module respectively to fix the first explosion relief mechanism.

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