Batteries and electrical devices

Abstract

The present application provides a battery, an electrical device, a method for manufacturing a battery, and a system. The battery includes a battery module, a housing, and a flow guide component. The battery module includes an explosion-proof component. The housing is configured to accommodate the battery module. The housing includes a gas exhaust channel. The gas exhaust channel includes an air inlet and an air outlet. The flow guide component is disposed in the housing and shields the explosion-proof component to form a gas guide channel. The gas guide channel is connected to the air inlet, and is used to guide the gas generated by the battery module after the explosion-proof component is destroyed to the outside of the housing through the air outlet. The battery provided in the embodiment of the present application is intended to solve the technical problem that the battery is prone to rapid fire and explosion, which seriously affects the safety of battery use.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] With the development of society and science and technology, batteries are widely used to power high-power devices, such as electric vehicles. As batteries are widely used in all aspects of human life, the safety requirements for batteries are getting higher and higher. However, during the use of batteries, thermal runaway may occur sometimes. Once thermal runaway occurs, the entire battery is prone to fire and explosion, which seriously affects the safety of battery use. Summary of the invention

[0003] The present application provides a battery and an electrical device, aiming to solve the technical problem that the battery is prone to rapid fire and explosion, which seriously affects the safety of battery use.

[0004] An embodiment of the present application provides a battery, including a battery module, a box, and a flow guide component.

[0005] The battery module includes an explosion-proof component. The box is configured to accommodate the battery module. The box includes a gas exhaust channel. The gas exhaust channel includes an air inlet and an air outlet. The guide component is arranged in the box and shields the explosion-proof component to form a gas guide channel. The gas guide channel is connected to the air inlet and is used to guide the gas generated by the battery module after the explosion-proof component is destroyed to the outside of the box through the air outlet.

[0006] In one embodiment of the present application, the flow guide component and the battery module are enclosed to form a gas guide channel, and the explosion-proof component is located in the gas guide channel. The gas released from the explosion-proof component can directly and more quickly enter the gas guide channel and be guided by the gas guide channel to the gas discharge channel, which is conducive to further reducing the possibility of gas escaping from the gas guide channel and spreading to the battery module outside the gas guide channel.

[0007] In one embodiment of the present application, the flow guide component includes a first plate body and a second plate body, the first plate body shields the explosion-proof component, and the two or more second plates extend from the first plate body toward the battery module, and the first plate body, the two or more second plates and the battery module enclose a gas guide channel. The first plate body and the second plate body can effectively block the flow of gas from different directions, thereby effectively guiding the gas to flow along the gas guide channel, reducing the possibility of the gas spreading freely around.

[0008] In one embodiment of the present application, the first plate body is detachably connected to the box body or the first plate body is welded to the box body. When the thermal runaway range of the battery module is small and the damage to the first plate body and the second plate body of the flow guide component is low, the flow guide component can be removed from the cover body and replaced with a new one without replacing the entire cover body.

[0009] In one embodiment of the present application, the battery module further includes an adapter, the adapter includes an airflow channel, the adapter is configured to be connected to the flow guide component, and the gas guide channel is connected to the air inlet through the airflow channel. The airflow channel of the adapter can play a role in assisting in guiding the gas, which can help reduce the possibility of the gas freely spreading around after being discharged from the gas guide channel and before entering the gas discharge channel.

[0010] In one embodiment of the present application, the adapter and the flow guide component are integrally formed. The adapter and the flow guide component can be seamlessly connected, which is conducive to reducing the possibility of gas escaping from the gap at the connection between the adapter and the flow guide component due to the separate design of the adapter and the flow guide component.

[0011] In one embodiment of the present application, the box includes a cover, the explosion-proof assembly is arranged toward the cover, and the flow guide component is configured to be connected to the cover. When the battery module releases gas from the damaged explosion-proof assembly due to thermal runaway, the gas will be blocked by the flow guide component and will not directly act on the cover, thereby reducing the possibility of the gas directly impacting the cover and causing damage to the cover.

[0012] In one embodiment of the present application, the box body further includes a shell, the shell is used to accommodate the battery module, the shell includes a side plate, the cover body is connected to the side plate, a receiving portion is formed at the connection position of the cover body and the side plate, the gas exhaust channel is provided on the side plate and the air inlet is connected to the receiving portion, and at least part of the adapter is located in the receiving portion. The gas guide channel and the air inlet of the gas exhaust channel are connected in the receiving portion through the adapter, so that the gas exchange position of the gas guide channel and the air inlet of the gas exhaust channel is located in the receiving portion, which is conducive to reducing the possibility of gas escaping during the exchange process and directly entering the box body.

[0013] In one embodiment of the present application, the housing includes two spaced-apart side plates, the battery module is disposed between the two side plates, and the gas guide channel extends from one side plate toward the other side plate. Both side plates are provided with gas exhaust channels, so that the gas generated when the battery module is thermally runaway can flow through the gas guide channel to the gas exhaust channels on both sides, thereby facilitating the improvement of gas exhaust efficiency.

[0014] In one embodiment of the present application, the number of battery modules is the same as the number of flow guide components, and one flow guide component is provided for each battery module to guide the gas generated after the explosion-proof component of each battery module is destroyed. The method of providing one flow guide component for each battery module can effectively separate the battery modules, so that the gas generated by each battery module when thermal runaway occurs is not easy to spread to other battery modules, effectively improving the safety of the battery.

[0015] In one embodiment of the present application, the gas exhaust channel further includes a confluence cavity, the air inlet and the air outlet are both connected to the confluence cavity, the number of the air inlets is the same as the number of the flow guide components, and one air inlet is connected to one air flow channel. After the confluence cavity is provided, the confluence cavity can accommodate more gas, and the pressure of the gas will decrease rapidly after entering the confluence cavity, so that the gas in the box can enter the gas exhaust channel through the air inlet more quickly, so that the gas can quickly leave the accommodation space of the box, which is conducive to further reducing the possibility of a sharp increase in the pressure inside the box due to the gas not being able to be quickly discharged from the box.

[0016] In one embodiment of the present application, the battery further includes a sealing component, which is configured to seal the gas guide channel so that the gas flows along the gas guide channel to the gas inlet. The sealing component can reduce the possibility of gas escaping from other positions of the gas guide channel during the process of entering the gas inlet of the gas exhaust channel.

[0017] In one embodiment of the present application, a sealing component is provided between the flow guide component and the battery module. On the one hand, it can reduce the possibility that gas enters the gap between the battery module and the side plate and causes the gas to be unable to be discharged in time; on the other hand, it can reduce the possibility that gas enters the gap between the battery module and the side plate and spreads to other battery modules through the gap, causing other battery modules to catch fire or explode.

[0018] And / or, a sealing component is provided between the battery module and the side plate, which can reduce the possibility of gas escaping from the gap between the guide component and the battery module when entering the air inlet of the gas exhaust channel.

[0019] In one embodiment of the present application, the battery also includes a pressure relief valve, which is arranged on the outer wall of the box and covers the gas outlet. The pressure relief valve is configured to be actuated to release pressure when the pressure or temperature in the gas discharge channel reaches a threshold value, thereby ensuring that the gas can be discharged into the external environment through the pressure relief valve in a timely and rapid manner.

[0020] The battery of the embodiment of the present application includes a housing, a battery module and a flow guide component. The battery module and the flow guide component are both arranged in the housing. The battery module includes an explosion-proof component. When the battery module encounters thermal runaway, the explosion-proof component is destroyed so that the battery module can release gas through the destroyed explosion-proof component. The flow guide component shields the explosion-proof component of the battery module to form a gas guide channel. The gas guide channel can guide the gas to flow along a predetermined path toward the gas exhaust channel. Then the gas will be quickly discharged from the housing from the gas exhaust channel. The set gas guide channel and gas exhaust channel can guide the gas to flow in a directional manner. In this way, the set gas guide channel and gas exhaust channel can help reduce the possibility that the gas released by the battery module that has thermal runaway spreads freely around and causes other battery modules that have not experienced thermal runaway to catch fire or explode, which is conducive to improving the safety of battery use.

[0021] An embodiment of the present application also provides an electrical device, including a battery as described in the above embodiment, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0023] Figure 1 is a structural schematic diagram of a vehicle disclosed in an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the exploded structure of a battery disclosed in one embodiment of the present application;

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 is a schematic diagram of the structure of a battery disclosed in one embodiment of the present application;

[0027] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure along the BB direction;

[0028] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0029] Figure 7 yes Figure 6 Enlarged view of point D in the middle;

[0030] Figure 8It is a schematic diagram of a partial structure of a battery disclosed in one embodiment of the present application;

[0031] Fig. 9 yes Figure 8 Enlarged view of point E in the middle;

[0032] Fig.10 It is a schematic diagram of a partial cross-sectional structure of a battery disclosed in one embodiment of the present application;

[0033] Fig.11 yes Fig.10 Enlarged view of point F in the middle;

[0034] Fig.12 is a schematic diagram of an exploded structure of a battery disclosed in another embodiment of the present application;

[0035] Fig.13 yes Fig.12 Enlarged view of point G in the middle. DETAILED DESCRIPTION

[0036] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0037] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] After noticing that once a battery has thermal runaway, the entire battery will quickly catch fire and explode, the applicant studied and analyzed the various structures and usage environment of the battery. The applicant found that when a battery module in the battery has thermal runaway, it will often quickly affect other battery modules that have not experienced thermal runaway, causing other battery modules that have not experienced thermal runaway to catch fire and explode in a very short time, and finally causing the entire battery to catch fire and explode. In order to avoid the explosion of the entire battery caused by thermal runaway of the battery module, the applicant cooled the battery module that had thermal runaway, but found that the temperature of the battery module rose rapidly after thermal runaway, and it was difficult to suppress the spread of thermal runaway by cooling alone. The applicant found that the key to suppressing the spread of thermal runaway is to discharge the high-temperature gas accumulated in the battery in time after discovering that the battery module has thermal runaway, so as to quickly reduce the battery temperature and prevent the spread of thermal runaway.

[0040] Based on the above problems found by the applicant, the applicant has improved the structure of the battery. The embodiments of the present application are further described below.

[0041] In order to better understand this application, Figures 1 to 13 The embodiments of the present application are described.

[0042] The present application embodiment provides an electrical device using a battery 10 as a power source. The electrical device may be, but is not limited to, a vehicle, a ship, or an aircraft. Figure 1 As shown, one embodiment of the present application provides a vehicle 1. Vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. In one embodiment of the present application, vehicle 1 may include a motor 1a, a controller 1b and a battery 10. Controller 1b is used to control the battery 10 to power motor 1a. Motor 1a is connected to the wheel through a transmission mechanism to drive vehicle 1 to move. Battery 10 can be used as a driving power source for vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1. In one example, battery 10 can be set at the bottom, front or rear of vehicle 1. Battery 10 can be used to power vehicle 1. In one example, battery 10 can be used as an operating power source for vehicle 1, for the circuit system of vehicle 1. Optionally, battery 10 can be used for the working power demand of vehicle 1 during startup, navigation and operation.

[0043] See also Figure 2As shown, the battery 10 may include more than two battery modules 20. In some optional embodiments, the battery 10 further includes a case 30. The case 30 includes a storage space. The battery module 20 is disposed in the storage space of the case 30. The case 30 may provide a mounting platform for the battery module 20, and may also provide protection for the battery module 20. More than two battery modules 20 are arranged in the case 30. More than two battery modules 20 may be arranged side by side in one direction to make full use of the storage space of the case 30.

[0044] See also Figure 2 As shown, the battery 10 further includes a flow guide component 40. The flow guide component 40 is disposed in the box body 30. The flow guide component 40 is disposed corresponding to the battery module 20. The number of the flow guide components 40 can be equal to the number of the battery modules 20, that is, one flow guide component 40 is disposed corresponding to one battery module 20. The flow guide component 40 and the box body 30 are separate structures, that is, they are provided separately from each other, and are independently processed and manufactured, and then the two are assembled.

[0045] See also Figure 3 As shown, the battery module 20 may include more than two battery cells 22, but the number of battery cells 22 included in the battery module 20 is not limited here. For each battery module 20, more than two battery cells 22 may be connected in series, in parallel, or in mixed connection. More than two battery cells 22 may be arranged side by side in one direction. The arrangement direction of the more than two battery cells 22 may be perpendicular to the arrangement direction of each battery module 20.

[0046] See also Figure 3 As shown, the battery module 20 includes an explosion-proof component 21. In an embodiment in which the battery module 20 includes more than two battery cells 22, the explosion-proof component 21 may be an explosion-proof valve on each battery cell 22. When the internal pressure of the battery cell 22 is too high, the explosion-proof valve will be destroyed so that the gas inside the battery cell 22 is released through the destroyed explosion-proof valve. The gas released from the battery cell 22 is in a high temperature and high pressure state. In some other embodiments, the battery module 20 has a shell (not shown in the figure) and an explosion-proof valve arranged on the shell. Two or more battery cells 22 are arranged in the shell. The explosion-proof component 21 may be an explosion-proof valve arranged on the shell. When the internal pressure of the battery cell 22 is too high, the battery cell 22 will release gas into the internal space of the shell. When the pressure inside the shell reaches a preset pressure value, the explosion-proof valve on the shell will be destroyed so that the gas inside the shell is released through the destroyed explosion-proof valve. The gas released from the shell is in a high temperature and high pressure state.

[0047] See also Figure 2 and Figure 3As shown, the box body 30 includes a gas exhaust channel 31. The gas exhaust channel 31 includes an air inlet 311 and an air outlet 312. The gas exhaust channel 31 is connected to the accommodating space in the box body 30 through the air inlet 311. The gas exhaust channel 31 is connected to the external environment through the air outlet 312. The gas exhaust channel 31 has the function of guiding the flow of gas. When the battery module 20 releases high-temperature and high-pressure gas due to thermal runaway, the gas can enter the gas exhaust channel 31 from the air inlet 311 of the gas exhaust channel 31, and under the guidance of the gas exhaust channel 31, it is finally discharged to the external environment from the air outlet 312 in a direction, thereby reducing the possibility of explosion of the battery 10 due to the accumulation of a large amount of gas released by the thermal runaway of the battery module 20.

[0048] See also Figures 4 to 6 As shown, the flow guide component 40 is arranged in the box body 30 and blocks the explosion-proof component 21 to form a gas guide channel 50. The explosion-proof component 21 is arranged corresponding to the gas guide channel 50. The gas guide channel 50 is connected to the air inlet 311 of the gas exhaust channel 31. The gas guide channel 50 is used to guide the gas generated by the battery module 20 after the explosion-proof component 21 is destroyed to the gas exhaust channel 31, and guide it to the outside of the box body 30 through the gas outlet 312 of the gas exhaust channel 31, so that the battery 10 can be quickly vented and depressurized, prevent the spread of thermal runaway, and reduce the possibility of explosion. Since the flow guide component 40 blocks the explosion-proof component 21, the flow guide component 40 can isolate the explosion-proof component 21 from the box body 30, so that the gas released after the explosion-proof component 21 is destroyed will be blocked by the flow guide component 40, reducing the possibility of the gas directly impacting the box body 30 and quickly melting the box body 30. Along the arrangement direction of the battery cells 22, the battery module 20 has two opposite ends. The gas exhaust channel 31 is provided in the area of ​​the box body 30 corresponding to one end of the battery module 20. It can be understood that the gas exhaust channels 31 are respectively provided in the areas of the box body 30 corresponding to the two ends of the battery module 20, so that the gas can be exhausted in two directions, which is conducive to improving the efficiency of gas exhaust from the box body 30. The extension direction of the guide component 40 is the same as the arrangement direction of the battery cells 22.

[0049] The battery 10 of the embodiment of the present application includes a box 30, a battery module 20 and a flow guide component 40. The battery module 20 and the flow guide component 40 are both arranged in the box 30. The battery module 20 includes an explosion-proof component 21. When the battery module 20 has thermal runaway, the explosion-proof component 21 is destroyed so that the battery module 20 can release internal gas through the destroyed explosion-proof component 21. The flow guide component 40 shields the explosion-proof component 21 of the battery module 20 to form a gas guide channel 50. The gas guide channel 50 can guide the gas to flow along a predetermined path toward the gas discharge channel 31. Then the gas will be quickly discharged from the box 30 from the gas discharge channel 31. The set gas guide channel 50 and gas discharge channel 31 can guide the gas to flow in a directional manner. In this way, it is conducive to reducing the possibility that the gas released by the battery module 20 that has thermal runaway spreads freely around, thereby causing other battery modules 20 that have not experienced thermal runaway to catch fire or explode, which is conducive to improving the safety of the battery 10.

[0050] In some embodiments, see Figure 5 and Figure 6 As shown, the guide component 40 and the battery module 20 enclose a gas guide channel 50, and the explosion-proof component 21 can be located in the gas guide channel 50, so that when thermal runaway occurs, the gas released from the position of the explosion-proof component 21 can directly enter the gas guide channel 50 and be guided by the gas guide channel 50 to the gas exhaust channel 31, which is beneficial to further reduce the possibility of gas escaping from the gas guide channel 50 and spreading to the battery module 20 outside the gas guide channel 50, thereby improving the exhaust efficiency.

[0051] In some embodiments, see Figure 7 As shown, the guide component 40 includes a first plate 41 and a second plate 42. The first plate 41 is configured to shield the explosion-proof component 21 to isolate the explosion-proof component 21 and the box body 30. The second plate 42 extends from the first plate 41 toward the battery module 20. The first plate 41, the second plate 42 and the battery module 20 enclose a gas guide channel 50. The first plate 41 can block the gas from the front of the explosion-proof component 21 of the battery module 20, while the second plate 42 can block the gas from the side of the explosion-proof component 21, so that the first plate 41 and the second plate 42 can effectively block the gas flow from different directions, respectively, and then effectively guide the gas to flow along the gas guide channel 50, reduce the possibility of the gas spreading freely around, and improve the exhaust efficiency. In one example, see Figures 7 to 9As shown, the flow guide component 40 includes a first plate body 41 and two second plate bodies 42. Along the arrangement direction of the battery module 20, the two second plate bodies 42 are arranged at intervals, and the two second plate bodies 42 are located on the same side of the first plate body 41, so that the flow guide component 40 is a U-shaped structure as a whole. A chamber enclosed by the first plate body 41 and the two second plate bodies 42 can form a gas guide channel 50 with the battery module 20. In one example, the first plate body 41 and the second plate body 42 are an integrally formed structure. It can be understood that the number of second plate bodies 42 can also be more than three. Along the arrangement direction of the battery module 20, more than three second plate bodies 42 are arranged at intervals. Two adjacent second plate bodies 42 and a portion of the first plate body 41 form a chamber. More than two chambers can form a gas guide channel 50 with the battery module 20.

[0052] In some embodiments, see Fig.10 As shown, the air inlet 311 of the gas exhaust channel 31 on the box body 30 is located on one side of the battery module 20, and the gas guide channel 50 extends and ends at the end of the battery module 20, so that there is a distance between the gas guide channel 50 and the air inlet 311 of the gas exhaust channel 31. The battery module 20 also includes an adapter 60. The adapter 60 includes an air flow channel 61 for guiding the flow of gas. The adapter 60 is configured to be connected to the guide component 40, so that the gas flowing out of the gas guide channel 50 can directly enter the air flow channel 61 of the adapter 60. The gas guide channel 50 is connected to the air inlet 311 of the gas exhaust channel 31 through the air flow channel 61 of the adapter 60. In the process of gas entering the gas exhaust channel 31 from the gas guide channel 50, the air flow channel 61 of the adapter 60 can play a role in assisting the gas guidance, which can help reduce the possibility of free spread to the surroundings after the gas is discharged from the gas guide channel 50 and before entering the gas exhaust channel 31.

[0053] In one example, the adapter 60 and the guide component 40 are an integrally formed structure, so that the adapter 60 and the guide component 40 can be seamlessly connected, which is conducive to reducing the possibility of gas escaping from the gap due to the gap between the adapter 60 and the guide component 40 being designed as separate parts. The cross-sectional shape of the adapter 60 can be the same as the cross-sectional shape of the guide component 40. Alternatively, the adapter 60 can also be a cylindrical structure, so that the gas flowing out of the gas guide channel 50 can directly enter the airflow channel 61 of the adapter 60, and enter the gas exhaust channel 31 under the guidance of the airflow channel 61, which is conducive to reducing the possibility of the gas freely spreading to the surroundings after being discharged from the gas guide channel 50 and before entering the gas exhaust channel 31.

[0054] In some embodiments, see Fig.10As shown, the box 30 includes a cover 32. The explosion-proof component 21 of the battery module 20 is arranged toward the cover 32. The guide component 40 is configured to be connected to the cover 32. The guide component 40 is arranged between the cover 32 and the battery module 20. When the battery module 20 releases gas from the damaged explosion-proof component 21 due to thermal runaway, the gas will be blocked by the guide component 40 and will not directly act on the cover 32, reducing the possibility of the gas directly impacting the cover 32 and causing damage to the cover 32. Exemplarily, when the battery 10 is applied to the vehicle 1, the cover 32 of the box 30 faces the passenger compartment. If the cover 32 of the box 30 is damaged, the gas can enter the passenger compartment quickly and cause harm to the occupants in the vehicle. The battery module 20 of this embodiment reduces the possibility of damage to the cover 32 by setting the guide component 40, thereby reducing the possibility of gas quickly invading the passenger compartment through the damaged cover 32 and causing harm to the occupants, and can also buy more time for the occupants to leave the vehicle 1.

[0055] In some embodiments, see Fig.10 As shown, the box body 30 also includes a shell 33. The shell 33 is used to accommodate the battery module 20. The shell 33 includes a side plate 331. The cover body 32 is connected to the side plate 331. The cover body 32 can be connected to the side plate 331 by fasteners and sealed with the side plate 331. A receiving portion 70 is formed at the connection position of the cover body 32 and the side plate 331. The opening of the receiving portion 70 faces the flow guide component 40. The gas exhaust channel 31 is provided on the side plate 331 and the air inlet 311 is connected to the receiving portion 70. The air outlet 312 of the gas exhaust channel 31 is located on the surface of the side plate 331 away from the battery module 20. At least part of the adapter 60 is located in the receiving portion 70. The air flow channel 61 of the adapter 60 is connected to the air inlet 311 of the gas exhaust channel 31. In this way, the adapter 60 located in the accommodating portion connects the gas guide channel 50 and the air inlet 311 of the gas exhaust channel 31, so that the gas exchange position of the gas guide channel 50 and the air inlet 311 of the gas exhaust channel 31 is located in the accommodating portion 70, which is conducive to reducing the possibility of gas escaping during the exchange process and directly entering the box body 30. In one example, the surface of the side plate 331 connected to the cover body 32 is a plane, and the cover body 32 has a flange for connecting to the side plate 331 and a recessed portion recessed away from the battery module 20. The guide component 40 and the adapter 60 are located in the recessed portion of the cover body 32. After the cover body 32 and the side plate 331 are connected, a accommodating portion 70 is formed between the recessed portion of the cover body 32 and the surface of the side plate 331 connected to the cover body 32.

[0056] In some embodiments, see Fig.10 As shown, the housing 33 further includes a support plate 333. The side plate 331 and the support plate 333 are connected. The battery module 20 is placed on the support plate 333.

[0057] In some embodiments, see Fig.10 As shown, the gas exhaust channel 31 also includes a confluence chamber 313. The air inlet 311 of the gas exhaust channel 31 and the air outlet 312 of the gas exhaust channel 31 are both connected to the confluence chamber 313. The number of the air inlets 311 is the same as the number of the guide components 40. The number of adapters 60 is the same as the number of the guide components 40. One air inlet 311 is connected to the air flow channel 61 of one adapter 60. When thermal runaway occurs in the battery module 20, the gas generated by the battery module 20 converges into the confluence chamber 313 through the corresponding air inlet 311, and then is discharged from the air outlet 312. After the confluence chamber 313 is set, the confluence chamber 313 can accommodate more gas, and the pressure of the gas will decrease rapidly after entering the confluence chamber 313, so that the gas in the box body 30 can enter the gas exhaust channel 31 through the air inlet 311 more quickly, so that the gas can quickly leave the accommodation space of the box body 30, which is beneficial to further reduce the possibility that the gas cannot be quickly discharged from the box body 30, causing the internal pressure of the box body 30 to rise sharply.

[0058] In some embodiments, see Fig.10 and Fig.11 As shown, the guide component 40 and the box body 30 are detachably connected or welded. The guide component 40 includes a first plate body 41 and a second plate body 42. The first plate body 41 is detachably connected to the cover body 32. For example, the first plate body 41 can be connected to the cover body 32 by screws or rivets. In this way, when the range of thermal runaway of the battery module 20 is small, and the first plate body 41 and the second plate body 42 of the guide component 40 are less damaged, the guide component 40 can be removed from the cover body 32 and replaced with a new guide component 40, without replacing the cover body 32 as a whole. Alternatively, the first plate body 41 is welded to the cover body 32. For example, the first plate body 41 and the cover body 32 can be connected by laser welding. In this way, the first plate body 41 is directly welded to the cover body 32, which can make the structure formed by the first plate body 41 and the cover body 32 more compact, which is conducive to reducing the space occupancy rate to improve the energy density of the battery 10.

[0059] In some embodiments, see Fig.10 and Fig.11As shown, the battery 10 also includes a sealing component 80. The sealing component 80 is configured to seal the gas guide channel 50 so that the gas can all flow along the gas guide channel 50 to the gas inlet 311 of the gas exhaust channel 31. The gas guide channel 50 has an outlet for docking with the gas inlet 311 of the gas exhaust channel 31. The sealing component 80 is used to seal the area except the outlet of the gas guide channel 50. The provision of the sealing component 80 can reduce the possibility of gas escaping from other positions of the gas guide channel 50 during the process of entering the gas inlet 311 of the gas exhaust channel 31. The material of the sealing component 80 is selected from a high temperature resistant and impact resistant material. The sealing component 80 can be a sheet structure. In one example, see Fig.10 As shown, a sealing member 80 is provided between the battery module 20 and the side plate 331. On the one hand, it can reduce the possibility that gas enters the gap between the battery module 20 and the side plate 331 and causes the gas to be unable to be discharged in time; on the other hand, it can reduce the possibility that gas enters the gap between the battery module 20 and the side plate 331 and spreads to other battery modules 20 through the gap, causing other battery modules 20 to catch fire or explode. In another example, see Fig.11 As shown, a sealing component 80 is provided between the flow guide component 40 and the battery module 20, which can reduce the possibility of gas escaping from the gap between the flow guide component 40 and the battery module 20 in the process of entering the air inlet 311 of the gas exhaust channel 31. Exemplarily, the flow guide component 40 includes a first plate body 41 and a second plate body 42. The first plate body 41 is configured to shield the explosion-proof component 21 to isolate the explosion-proof component 21 and the box body 30. The second plate body 42 extends from the first plate body 41 toward the battery module 20. The first plate body 41, the second plate body 42 and the battery module 20 enclose a gas guide channel 50. A sealing component 80 is provided between the second plate body 42 and the battery module 20.

[0060] In some embodiments, see Fig.12As shown, the shell 33 includes two spaced-apart side plates 331 and a connecting plate 332. The two side plates 331 are spaced-apart along the arrangement direction of the battery cells 22. The connecting plate 332 is configured to connect the two side plates 331. The battery module 20 is disposed between the two side plates 331. The gas guide channel 50 extends from one side plate 331 toward the other side plate 331. The gas guide channel 50 has two opposite outlets. Both side plates 331 are provided with gas exhaust channels 31. The two outlets of the gas guide channel 50 correspond to the gas exhaust channels 31 on the two side plates 331, respectively. The gas generated when the battery module 20 thermally runs away can flow to the gas exhaust channels 31 on both sides through the two outlets of the gas guide channel 50, which is beneficial to improve the gas exhaust efficiency and reduce the possibility that the gas accumulates in the box body 30 for a long time, causing the gas to spread to other battery modules 20 or the battery 10 as a whole to explode due to a rapid increase in pressure. In one example, see Fig.11 and 12 As shown, the number of battery modules 20 is the same as the number of flow guide components 40, and one flow guide component 40 is provided for each battery module 20. One flow guide component 40 and one battery module 20 form a gas guide channel 50. One flow guide component 40 is used to separately guide the gas generated after the explosion-proof component 21 of one battery module 20 is destroyed. The method of providing one flow guide component 40 for each battery module 20 can effectively separate the battery modules 20, so that the gas generated by each battery module 20 when thermal runaway occurs is not easy to spread to other battery modules 20, effectively improving the safety of the battery 10.

[0061] In some embodiments, see Fig.12 and Fig.13As shown, the battery 10 also includes a pressure relief valve 90. The pressure relief valve 90 is arranged on the outer wall of the box body 30 and covers the gas outlet 312 of the gas exhaust channel 31. The box body 30 includes a side plate 331 and a connecting plate 332. The pressure relief valve 90 is detachably connected to the side plate 331 of the box body 30. For example, the pressure relief valve 90 is connected to the side plate 331 by screws. The pressure relief valve 90 is configured to be actuated to release pressure when the pressure or temperature in the gas exhaust channel 31 reaches a threshold. The gas generated by the thermal runaway of the battery module 20 in the box body 30 is guided to the gas exhaust channel 31 through the gas guide channel 50, and then the pressure relief valve 90 is actuated under the action of the gas, thereby switching from a normally closed state to an open state, ensuring that the gas can be discharged into the external environment through the pressure relief valve 90 in a timely and rapid manner. When the battery 10 is in a normal working state, since the pressure relief valve 90 in a normally closed state covers the gas outlet 312 of the gas exhaust channel 31, the pressure relief valve 90 can prevent liquid water and impurities from entering the interior of the box 30 through the gas exhaust channel 31, thereby reducing the possibility that liquid water and impurities have an adverse effect on the battery module 20. In one example, the pressure relief valve 90 can be a one-way conducting valve.

[0062] The battery 10 of the embodiment of the present application includes a box 30, a battery module 20 and a flow guide component 40. The battery module 20 and the flow guide component 40 are both arranged in the box 30. The box 30 includes a gas exhaust channel 31. The flow guide component 40 and the box 30 are split structures. The flow guide component 40 shields the explosion-proof component 21 of the battery module 20. When the battery module 20 has thermal runaway, the explosion-proof component 21 will be destroyed to release high-temperature and high-pressure gas. The gas guide channel 50 can guide the gas released from the explosion-proof component 21 to the gas exhaust channel 31, and then the gas will be discharged to the outside of the box 30 through the gas exhaust channel 31. In this way, the gas generated when the battery module 20 has thermal runaway will flow in a predetermined direction and be discharged to the outside of the box 30, and it is not easy to flow and spread around in the box 30, thereby effectively reducing the possibility of gas spreading to other battery modules 20 and causing other battery modules 20 to catch fire or explode, which is conducive to improving the safety of the battery 10.

[0063] The present application also provides a method for manufacturing a battery 10, including:

[0064] The battery module 20 including the explosion-proof component 21 is arranged in a box body 30 including a gas exhaust channel 31, wherein the gas exhaust channel 31 includes an air inlet 311 and an air outlet 312;

[0065] The guide component 40 is arranged in the box body 30 and covers the explosion-proof component 21 to form a gas guide channel 50. The gas guide channel 50 is connected to the air inlet 311 and is used to guide the gas generated by the battery module 20 after the explosion-proof component 21 is destroyed to the outside of the box body 30 through the air outlet 312.

[0066] In some embodiments, the box body 30 includes a cover body 32 and a shell body 33. The cover body 32 and the shell body 33 are connected. In the step of arranging the battery module 20 including the explosion-proof component 21 in the box body 30 including the gas exhaust channel 31, the battery module 20 is arranged in the shell body 33, and then the cover body 32 and the shell body 33 are covered. The gas exhaust channel 31 is arranged on the shell body 33. In the step of arranging the guide component 40 in the box body 30 and shielding the explosion-proof component 21 to form the gas guide channel 50, the guide component 40 is connected and fixed to the cover body 32 in advance, and then the cover body 32 and the shell body 33 are covered. The guide component 40 shields the explosion-proof component 21 and encloses the battery module 20 to form the gas guide channel 50.

[0067] In the battery 10 manufactured by the manufacturing method of the battery 10 of the embodiment of the present application, the flow guide component 40 shields the explosion-proof component 21 of the battery module 20. The gas guide channel 50 and the gas exhaust channel 31 can guide the gas to flow along a predetermined path. In this way, the provided gas guide channel 50 and the gas exhaust channel 31 can help reduce the possibility that the gas released by the battery module 20 with thermal runaway freely spreads around and causes other battery modules 20 without thermal runaway to catch fire or explode, which is conducive to improving the safety of the battery 10.

[0068] The present application also provides a manufacturing system for a battery 10, including:

[0069] A first assembly device is configured to place the battery module 20 including the explosion-proof component 21 in a box 30 including a gas exhaust channel 31, wherein the gas exhaust channel 31 includes an air inlet 311 and an air outlet 312;

[0070] The second assembly device is configured to set the guide component 40 in the box body 30 and cover the explosion-proof component 21 to form a gas guide channel 50. The gas guide channel 50 is connected to the air inlet 311 and is used to guide the gas generated by the battery module 20 after the explosion-proof component 21 is destroyed to the outside of the box body 30 through the air outlet 312.

[0071] In some embodiments, the box body 30 includes a cover body 32 and a shell 33. The cover body 32 and the shell 33 are connected. The gas exhaust channel 31 is set on the shell 33. The battery module 20 is set in the shell 33 by a first assembly device, and then the cover body 32 and the shell 33 are covered. The guide component 40 is pre-connected and fixed to the cover body 32 by a second assembly device, and then the cover body 32 and the shell 33 are covered. The guide component 40 shields the explosion-proof component 21 and encloses the battery module 20 to form a gas guide channel 50.

[0072] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery comprising: Battery modules, including explosion-proof components; A box body, configured to accommodate the battery module, the box body comprising a gas exhaust channel, the gas exhaust channel comprising an air inlet and an air outlet; A flow guide component is disposed in the box body and shields the explosion-proof component to form a gas guide channel, the gas guide channel is connected to the air inlet, and is used to guide the gas generated by the battery module after the explosion-proof component is destroyed to the outside of the box through the air outlet; In which, the guide component and the battery module together form the gas guide channel, the explosion-proof component is located in the gas guide channel, the guide component includes a first plate and a second plate, the first plate blocks the explosion-proof component, and more than two second plates extend from the first plate toward the battery module respectively, and the first plate, more than two second plates and the battery module together form the gas guide channel.

2. The battery according to claim 1, wherein The first plate body is detachably connected to the box body or the first plate body is welded to the box body.

3. The battery according to claim 1 or 2, wherein: The battery module includes an adapter, the adapter includes an airflow channel, the adapter is configured to be connected to the flow guide component, and the gas guide channel is connected to the air inlet through the airflow channel.

4. The battery according to claim 3, wherein The adapter and the flow guide component are an integrally formed structure.

5. The battery according to claim 4, wherein The box body comprises a cover body, the explosion-proof assembly is arranged toward the cover body, and the flow guide component is configured to be connected with the cover body.

6. The battery according to claim 5, wherein The box body also includes a shell, which is used to accommodate the battery module. The shell includes a side panel, the cover is connected to the side panel, and a receiving portion is formed at the connection position between the cover and the side panel. The gas exhaust channel is arranged on the side panel and the air inlet is connected to the receiving portion, and at least part of the adapter is located in the receiving portion.

7. The battery according to claim 6, wherein The housing includes two side plates that are spaced apart from each other, the battery module is disposed between the two side plates, and the gas guiding channel extends from one side plate toward the other side plate.

8. The battery according to claim 6 or 7, wherein: The number of the battery modules is the same as the number of the guide components, and one guide component is correspondingly provided for one battery module, so as to individually guide the gas generated after the explosion-proof component of each battery module is destroyed.

9. The battery according to claim 8, wherein The gas exhaust channel also includes a confluence cavity, the air inlet and the air outlet are both connected to the confluence cavity, the number of the air inlets is the same as the number of the flow guide components, and one air inlet is connected to one air flow channel.

10. The battery according to claim 6 or 7, wherein: The battery further includes a sealing member configured to seal the gas guide passage so that the gas flows along the gas guide passage to the gas inlet.

11. The battery according to claim 10, wherein The sealing component is arranged between the guide component and the battery module; and / or the sealing component is arranged between the battery module and the side plate.

12. The battery according to claim 1, wherein The battery further includes a pressure relief valve, which is disposed on an outer wall of the box and covers the gas outlet, and is configured to be actuated to release pressure when the pressure or temperature in the gas exhaust channel reaches a threshold.

13. An electrical device, comprising the battery according to any one of claims 1 to 12, wherein the battery is used to provide electrical energy.

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