Battery enclosure, battery pack and electrical equipment

Abstract

This disclosure relates to a battery enclosure, a battery pack, and an electrical device. The battery enclosure includes a bottom protective plate, a support plate, a heat insulation component, and a connector. The support plate supports the battery module, and an exhaust channel is provided between the support plate and the bottom protective plate. The support plate is provided with a clearance portion for gas from the explosion-proof valve of the battery module to enter the exhaust channel. The heat insulation component is disposed on the side of the bottom protective plate facing the support plate and is at least partially opposite to the clearance portion. The connector is disposed within the exhaust channel and is used to connect the support plate and the heat insulation component. The connector is configured to disconnect the connection between the support plate and the heat insulation component at least partially in the event of thermal runaway of the battery pack. The heat insulation component can block and insulate against high-temperature and high-pressure gases, resulting in a high level of safety for the bottom protective plate.

Description

Technical Field

[0001] This disclosure relates to the field of battery pack technology, specifically to a battery housing, a battery pack, and an electrical device. Background Technology

[0002] A battery pack is a device used to provide energy to electrical equipment (such as vehicles) and is a core component of electrical equipment.

[0003] When a battery pack experiences thermal runaway during use, a large amount of gas generated inside the battery pack needs to be released. In related technologies, an exhaust channel is typically installed between the battery pack's support plate and bottom protective plate. While this exhaust channel allows for gas release, the high-temperature, high-pressure gas can easily damage the bottom protective plate during the exhaust process. Utility Model Content

[0004] This disclosure provides a battery enclosure, a battery pack, and an electrical device to at least partially overcome the problems existing in the related art.

[0005] To achieve the above objectives, according to a first aspect of this disclosure, a battery housing is provided, comprising:

[0006] Bottom guard plate;

[0007] A support plate is used to support the battery module. There is an exhaust channel between the support plate and the bottom protective plate. The support plate is provided with a clearance part, which is used to allow gas from the explosion-proof valve of the battery module to enter the exhaust channel.

[0008] A heat insulation element is disposed on the side of the bottom protective plate facing the support plate and is at least partially opposite the clearance portion; and

[0009] A connector, disposed within the exhaust channel, is used to connect the support plate and the heat insulation component;

[0010] The connector is configured to disconnect the connection between the support plate and the thermal insulation member at least partially in the event of thermal runaway of the battery pack.

[0011] With the above technical solution, since the base plate structure is equipped with a heat insulation component, which is located on the side of the base plate facing the support plate (i.e., between the end of the connector away from the support plate and the base plate), and the heat insulation component is at least partially opposite to the clearance part, even if the battery pack experiences thermal runaway, the heat insulation component can block and insulate the high-temperature, high-pressure gas ejected from the clearance part. The high-temperature, high-pressure gas ejected from the clearance part is less likely to directly spray onto the base plate, effectively preventing the high-temperature, high-pressure gas from directly spraying onto the base plate during thermal runaway. This avoids the base plate itself and the protective layer located on the side of the base plate away from the battery module (i.e., the side of the base plate closer to the ground) from being easily damaged by the high-temperature, high-pressure gas. The base plate has high safety and is not easily damaged even during thermal runaway of the battery pack, which helps improve the structural integrity of the battery pack during thermal runaway and thus improves the safety of the battery pack during thermal runaway.

[0012] In some possible implementations, the heat insulation member is provided with a plurality of connecting portions, which are spaced apart from the heat insulation member and connected to the connecting portion;

[0013] The connector is configured to detach from at least a portion of the connection in the event of thermal runaway of the battery pack.

[0014] Thus, the end of the connector away from the battery module can be connected to the heat insulation component through multiple connecting parts arranged at intervals on the heat insulation component. Since the connector is connected to the heat insulation component through multiple connection points, each connection point only needs to provide a small connection force to achieve the connection between the connector and the heat insulation component. In this way, when the battery pack experiences thermal runaway, the connection points with small connection forces are prone to failure, thereby breaking the connection between the support plate and the heat insulation component at least at some locations.

[0015] In addition, the multiple spaced connecting parts can simultaneously pull the bottom guard plate at different positions, which can further prevent the bottom guard plate from sagging during the use of the battery pack.

[0016] In some possible implementations, the connecting portion is adhered to the connector.

[0017] In this way, during normal use of the battery pack, the connecting part can reliably bond the connector and the bottom cover plate together. When the battery pack experiences thermal runaway, the connecting part can also melt under the action of high temperature and high pressure gas or the bonding strength can be reduced under high temperature and high pressure, thereby breaking the connection between the connector and the bottom cover plate at least partially and expanding the venting channel.

[0018] In some possible implementations, the connection portion includes a connection hole formed in the thermal insulation member, the connection hole being bonded to the connection member.

[0019] In this way, during the battery pack assembly process, there is no need to repeatedly measure the position of the connector on the heat insulation component. Simply insert the connector into the connector hole to set the connector in the preset position on the heat insulation component, which helps to improve the production and assembly efficiency of the battery pack.

[0020] Furthermore, by setting an adhesive structure such as adhesive in the connection hole, the connection between the connector and the bottom cover plate can be realized. When the battery pack experiences thermal runaway, the adhesive structure set in the connection hole can melt or the adhesive strength can be reduced under high temperature and high pressure, thereby breaking the connection between the connector and the bottom cover plate at some points.

[0021] In addition, the wall of the connection hole can also limit the adhesive in the connection hole, so that the adhesive and other bonding materials are not easy to overflow to other parts of the bottom protection plate. This effectively prevents the bonding structure from overflowing to other parts of the bottom protection plate. If the bonding area between the connector and the heat insulation component is too large, it will be difficult to disconnect the connection between the connector and the heat insulation component when the battery pack experiences thermal runaway.

[0022] In some possible implementations, the diameter D of the connecting hole satisfies: 2mm ≤ D ≤ 20mm.

[0023] Since the diameter D of the connecting hole is greater than or equal to 2mm, the connecting hole can have a certain cross-sectional area. The connecting hole with a certain cross-sectional area can make the connector and the bottom guard plate have a certain connection area. The connection between the connector and the bottom guard plate connected by a certain connection area is more reliable, effectively avoiding the situation where the bottom guard plate is easy to fall off the connector due to the small connection area between the connector and the bottom guard plate.

[0024] Furthermore, since the diameter D of the connection hole is less than or equal to 20mm, the cross-sectional area of ​​the connection hole will not be too large. This can effectively prevent the connection between the connector and the bottom plate from being too large due to the cross-sectional area of ​​the connection hole being too large. In the event of thermal runaway of the battery pack, the high-temperature and high-pressure gas that is ejected through the explosion-proof valve and injected into the exhaust channel through the clearance part cannot disconnect the connection between the connector and the bottom plate.

[0025] In some possible implementations, the heat insulation element extends along a first direction, and the heat insulation element is arranged corresponding to a plurality of individual cells arranged along the first direction in the battery module.

[0026] Compared to the implementation method that requires placing heat insulation components at corresponding positions in each battery module, the battery housing provided in this disclosure only requires placing the heat insulation components extending along the first direction at preset positions on the bottom protective plate to realize the arrangement of heat insulation components for multiple individual batteries. This is beneficial to simplifying the assembly efficiency of heat insulation components on the bottom protective plate, and the structure of the heat insulation components is relatively simple.

[0027] In addition, the heat insulation components arranged in relation to the multiple individual cells spaced apart along the first direction can simultaneously block and insulate the high-temperature and high-pressure gas ejected from the explosion-proof valves of the multiple individual cells and injected into the exhaust channel through the clearance part, which is beneficial to improving the protection effect on the bottom protective plate and the protective layer set on the bottom protective plate.

[0028] In some possible implementations, in the first direction, there are multiple connection positions between the heat insulation member and the connector, and the multiple connection positions are staggered with each other.

[0029] Multiple staggered connection points help reduce the number of connection points between the thermal insulation component and the connector. This avoids the situation where too many connection points lead to excessively strong connections between the thermal insulation component and the connector, making it impossible to disconnect at least some of the connections when the battery pack experiences thermal runaway.

[0030] In some possible implementations, there are multiple heat insulation elements, which are spaced apart on the bottom protective plate.

[0031] On the one hand, multiple heat insulation components spaced apart on the bottom protective plate can block and insulate the high-temperature and high-pressure gas sprayed from the explosion-proof valves of multiple battery modules in the battery pack and injected into the exhaust channel through the clearance part; on the other hand, compared with a single heat insulation component, multiple spaced heat insulation components are lighter in weight, which helps to reduce the weight of the entire battery pack and thus helps to improve the energy density of the entire battery pack.

[0032] In some possible implementations, the insulation element includes a mica sheet.

[0033] Mica sheets have high insulation, high temperature resistance, corrosion resistance and good mechanical properties, which can meet the requirements of blocking and heat insulation of high temperature and high pressure gas ejected from the explosion-proof valve of the battery module.

[0034] In some possible implementations, the connector extends in a second direction within the exhaust passage;

[0035] The connector is adapted to correspond to a plurality of individual cells arranged along the second direction in the battery module.

[0036] Since the connectors extending along the second direction are arranged corresponding to multiple individual cells in the battery module, the connectors can act as a reinforcing beam inside the battery box, thereby providing additional structural support for the support plate, the individual cells set on the support plate, and other components in the battery pack, which is beneficial to improving the overall strength, stiffness, and modal characteristics of the battery pack.

[0037] In some possible implementations, there are multiple connectors, which are spaced apart within the exhaust passage along a direction intersecting the second direction.

[0038] Multiple connectors spaced apart along the direction intersecting the extension direction of the connectors can simultaneously support the support plate, multiple battery modules mounted on the support plate, and other components within the battery pack, which helps to further improve the overall strength, rigidity, and modal characteristics of the battery pack.

[0039] In some possible implementations, the connector is a corrugated member having crests and troughs spaced apart in the second direction;

[0040] One of the crests and troughs is connected to the heat insulation component, and the other is connected to the support plate.

[0041] The crests and troughs enable the connection between the connector, the insulation, and the support plate, thereby enabling the connection between the support plate and the bottom cover plate.

[0042] Furthermore, by making the connectors wavy, it is possible to reduce the weight of the connectors themselves while achieving the connection between the support plate and the heat insulation plate. This helps to reduce the weight of the entire battery pack and improve the energy density of the battery pack.

[0043] In some possible implementations, the crest portion has a first connecting plane for bonding to the support plate; and / or,

[0044] The trough portion has a second connecting plane, which is used to bond with the heat insulation component.

[0045] The first connecting plane, being planar, facilitates adhesive application, thereby enabling easy connection of the corrugated portion to the support plate. Furthermore, the second connecting plane, also being planar, facilitates adhesive application, thereby enabling easy connection of the corrugated portion to the insulation component.

[0046] Furthermore, the crest portion connected to the support plate via the first connecting plane can be configured to have surface-to-surface contact with the support plate, which helps to increase the connection area between the crest portion and the support plate, thereby increasing the connection reliability between the connector and the support plate.

[0047] Furthermore, the trough portion connected to the heat insulation component via the second connecting plane can also form a surface-to-surface contact with the heat insulation component, which is beneficial to increasing the connection area between the trough portion and the support plate, thereby improving the connection reliability between the connector and the heat insulation component.

[0048] In some possible implementations, the trough portion is connected to the thermal insulation element;

[0049] Along the second direction, the size of the trough corresponding to the explosion-proof valve of the battery cell is larger than the size of the trough that is misaligned with the explosion-proof valve of the battery cell.

[0050] The larger trough portion corresponding to the explosion-proof valve can be adapted to the size of the insulation component, making it easy to connect the trough portion to the insulation component.

[0051] Furthermore, the smaller troughs that are misaligned with the explosion-proof valve can also be adapted to the position of the flow channel on a support plate, for example, a liquid-cooled plate. In this way, at the position of the smaller troughs (i.e., the position of the flow channel on the support plate), there can be a larger number of crests, and the larger number of crests can reliably support the flow channel on the support plate.

[0052] In some possible implementations, the clearance portion includes a clearance opening formed in the support plate, the clearance opening corresponding to the valve port of the explosion-proof valve of the battery module.

[0053] By setting up an avoidance opening and at least partially corresponding the heat insulation component with the avoidance opening, when the battery pack experiences thermal runaway, the high-temperature and high-pressure gas ejected from the valve port of the explosion-proof valve can enter the exhaust channel through the avoidance opening. Instead of being directly sprayed onto the support plate, it can be sprayed onto the heat insulation component through the avoidance opening. This effectively avoids the situation where the high-temperature and high-pressure gas is directly sprayed onto the support plate when the battery pack experiences thermal runaway, which could easily damage the support plate.

[0054] In addition, by setting clearance openings on the support components, it is possible to prevent the support plate from blocking the gas when it is discharged through the valve port of the explosion-proof valve, which would prevent the large amount of gas generated by thermal runaway from being discharged in time and thus cause explosions and other problems. This also helps to improve the safety of the battery pack.

[0055] According to a second aspect of this disclosure, a battery pack is provided, including a battery module and a battery housing as described above;

[0056] The battery module is housed within the battery casing.

[0057] According to a third aspect of this disclosure, an electrical device is provided, including a device body and a battery pack as described above, the battery pack being used to supply power to the device body.

[0058] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0059] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0060] Figure 1 This is a three-dimensional structural diagram of a battery pack provided in an exemplary embodiment of this disclosure.

[0061] Figure 2 This is an exploded three-dimensional structural diagram of a battery pack provided in an exemplary embodiment of this disclosure.

[0062] Figure 3 This is a cross-sectional schematic diagram of a battery pack provided in an exemplary embodiment of this disclosure.

[0063] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0064] Figure 5 This is a three-dimensional structural diagram of the connector from the bottom side view of an exemplary embodiment of the present disclosure.

[0065] Figure 6 yes Figure 5 Enlarged schematic diagram of part B.

[0066] Figure 7 This is a bottom view schematic diagram of a partial structure of a battery box provided in an exemplary embodiment of this disclosure.

[0067] Figure 8 yes Figure 7 An enlarged schematic diagram of section C.

[0068] Figure 9 This is a three-dimensional structural diagram of a bottom protective plate and a heat insulation component in an assembled state according to an exemplary embodiment of this disclosure.

[0069] Explanation of reference numerals in the attached figures

[0070] 100-Battery pack; 10-Battery housing; 101-Tray; 102-Top cover; 103-Frame; 1-Bottom plate structure; 11-Bottom protective plate; 12-Support plate; 121-Flow channel plate; 122-Mounting plate; 123-Apartment; 124-Apartment opening; 13-Heat insulation component; 131-Connecting part; 132-Connecting hole; 14-Connecting component; 141-Crest part; 142-Trough part; 143-First connecting plane; 144-Second connecting plane; 145-Reinforcing rib; 15-Exhaust channel; 20-Battery module. Detailed Implementation

[0071] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0072] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment". Definitions of other terms will be given in the following description.

[0073] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0074] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0075] In this disclosure, it should be understood that directional terms such as "first direction," "second direction," and "height direction of the battery pack" are defined according to the orientation of the accompanying drawings and are only for the convenience of describing this disclosure and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or a specific orientational construction and operation, and therefore should not be construed as a limitation of this disclosure. For example, the first direction can be the length direction of the battery pack, i.e., the length direction of the vehicle; the second direction can be the width direction of the battery pack, i.e., the width direction of the vehicle. See reference [link / reference] for details. Figures 1 to 4 , Figure 7 as well as Figure 9 As shown.

[0076] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0077] As mentioned above, if thermal runaway occurs during battery pack use, in order to ensure the safety of the battery pack, the gas inside the battery pack will be discharged through the explosion-proof valve of the battery module and discharged to the outside of the battery pack through the exhaust channel set between the liquid cooling plate and the bottom protective plate. However, due to the high temperature and pressure of the gas, the gas is prone to damage to the bottom protective plate and / or the protective layer set on the surface of the bottom protective plate away from the battery module during the exhaust process. Therefore, how to protect the bottom protective plate and the protective layer set on the bottom protective plate when the battery pack experiences thermal runaway has become an urgent technical problem to be solved.

[0078] In view of this, such as Figures 1 to 9 As shown, according to a first aspect of this disclosure, a battery housing 10 is provided, including a bottom protective plate 11, a support plate 12, a heat insulation member 13, and a connector 14. The support plate 12 is used to support a battery module 20. An exhaust channel 15 is provided between the support plate 12 and the bottom protective plate 11. The support plate 12 is provided with a clearance portion 123, which is used to allow gas from the explosion-proof valve of the battery module 20 to enter the exhaust channel 15. The heat insulation member 13 is disposed on the side of the bottom protective plate 11 facing the support plate 12 and is disposed opposite to at least a portion of the clearance portion 123. The connector 14 is disposed in the exhaust channel 15 and is used to connect the support plate 12 and the heat insulation member 13. The connector 14 is configured to disconnect the connection between the support plate 12 and the heat insulation member 13 at least a portion of the position when thermal runaway occurs in the battery pack 100.

[0079] The above-mentioned arrangement of at least part of the heat insulation member 13 and the clearance portion 123 opposite to each other means that, in the height direction of the battery pack, the projection of the heat insulation member 13 and the projection of the clearance portion 123 at least partially coincide. For example, in the height direction of the battery pack, the projection of the clearance portion 123 is located within the projection of the heat insulation member 13.

[0080] When the aforementioned battery housing 10 is applied to the battery pack 100, by setting the connector 14 inside the exhaust channel 15, when the battery pack 100 is in normal use, the connector 14 can connect the support plate 12 and the bottom guard plate 11 through the heat insulation member 13, preventing the bottom guard plate 11 from falling due to gravity, which would cause the bottom guard plate 11 to be impacted due to insufficient ground clearance, thus protecting the bottom guard plate 11 and the battery pack 100.

[0081] Furthermore, when the battery pack 100 is in normal use, the connector 14 can connect the support plate 12 and the bottom protective plate 11, which helps to improve the overall rigidity of the battery pack 100.

[0082] Furthermore, when thermal runaway occurs in the battery pack 100, the bottom protective plate 11 structure can disconnect the connection between the support plate 12 and the heat insulation member 13 at least partially, thereby disconnecting the connection between the support plate 12 and the bottom protective plate 11 at least partially. In this way, the high-temperature and high-pressure gas discharged through the explosion-proof valve can expand the exhaust space of the exhaust channel 15. The larger exhaust space allows the battery pack 100 to exhaust better, thereby avoiding the problem of explosion caused by the inability to discharge a large amount of gas generated by thermal runaway. At the same time, by increasing the exhaust space of the exhaust channel 15, it is also beneficial to reduce the internal temperature of the battery pack 100 and avoid the continuous accumulation of internal temperature of the battery pack 100, which could lead to an excessively high internal temperature.

[0083] With the above technical solution, since a heat insulation component 13 is provided on the bottom plate structure 1, and the heat insulation component 13 is located on the side of the bottom protective plate 11 facing the support plate 12, that is, the heat insulation component 13 is located between the end of the connector 14 away from the support plate and the bottom protective plate 11, and the heat insulation component 13 and the clearance part 123 are at least partially opposite to each other, even if the battery pack 100 experiences thermal runaway, the heat insulation component 13 can block and insulate the high-temperature and high-pressure gas ejected from the clearance part 123, and the high-temperature and high-pressure gas ejected through the clearance part 123 is not likely to directly spray onto the bottom protective plate 11. This effectively prevents the high-temperature, high-pressure gas from being directly sprayed onto the bottom protective plate 11 when the battery pack 100 experiences thermal runaway. Under the influence of the high-temperature, high-pressure gas, the bottom protective plate 11 itself and the protective layer located on the side of the bottom protective plate 11 away from the battery module 20 (i.e., the side of the bottom protective plate 11 closer to the ground) are easily damaged. The bottom protective plate 11 has high safety and is not easily damaged even when the battery pack 100 experiences thermal runaway. This helps to improve the structural integrity of the battery pack 100 when thermal runaway occurs, thereby improving the safety of the battery pack 100 when thermal runaway occurs.

[0084] It is understandable that disconnecting the connection between connector 14 and insulation 13 could be achieved by:

[0085] In at least a portion of the exhaust passage 15, the connector 14 is detached from at least one of the support plate 12 and the heat insulation member 13, or the connector 14 itself is partially disconnected, so that the connector 14 is disconnected into different parts, which is not limited in this disclosure. It should be noted that the gas ejected from the explosion-proof valve of the battery module 20 can be a mixture of any one or more of gaseous substances, solid substances, and liquid substances.

[0086] In the battery housing 10 provided in this disclosure, the heat insulation component 13 can be connected to the connector 14 through one connection point, or the heat insulation component 13 can be connected to the connector 14 simultaneously through multiple connection points; this disclosure does not limit this. In some possible embodiments, such as Figure 2 and Figure 9 As shown, the heat insulation component 13 is provided with a plurality of connecting portions 131, which are spaced apart on the heat insulation component 13 and connected to the connecting member 14. The connecting member 14 is configured to detach from at least a portion of the connecting portions 131 when thermal runaway occurs in the battery pack 100.

[0087] Thus, the end of the connector 14 away from the battery module 20 can be connected to the heat insulation component 13 through multiple connecting portions 131 arranged at intervals on the heat insulation component 13. Since the connector 14 is connected to the heat insulation component 13 through multiple connection points, each connection point only needs to provide a small connection force to achieve the connection between the connector 14 and the heat insulation component 13. Thus, when the battery pack 100 experiences thermal runaway, the connection points with a small connection force are prone to failure, thereby breaking the connection between the support plate 12 and the heat insulation component 13 at least partially.

[0088] In addition, the multiple spaced connecting parts 131 can simultaneously pull the bottom cover plate 11 at different positions, which can further prevent the bottom cover plate 11 from falling during the use of the battery pack 100.

[0089] In the battery housing 10 provided in this disclosure, the connecting portion 131 can be connected to the connector 14 in any suitable manner. For example, the connecting portion 131 and the connector 14 can be connected by any suitable method such as welding or snap-fitting, and this disclosure does not limit this. As one embodiment of this disclosure, the connecting portion 131 is bonded to the connector 14.

[0090] Thus, during normal use of the battery pack 100, the connecting part 131 can reliably bond the connector 14 and the bottom cover plate 11 together. When the battery pack 100 experiences thermal runaway, the connecting part 131 can also melt under the action of high temperature and high pressure gas or the bonding strength can be reduced under high temperature and high pressure, thereby breaking the connection between the connector 14 and the bottom cover plate 11 at least partially, and expanding the exhaust channel 15.

[0091] This disclosure does not limit the specific type and shape of the connecting portion 131. In some possible embodiments, such as Figure 2 and Figure 9 As shown, the connecting part 131 includes a connecting hole 132 formed in the heat insulation member 13, and the connecting hole 132 is bonded to the connecting member 14.

[0092] Thus, during the assembly of the battery pack 100, there is no need to repeatedly measure the position of the connecting part 131 on the heat insulation component 13. Simply insert the connecting part 131 into the connecting hole 132 to set the connecting part 131 in the preset position on the heat insulation component 13, which helps to improve the production and assembly efficiency of the battery pack 100.

[0093] For example, when the connecting part 131 is an adhesive structure formed by curing adhesive, there is no need to repeatedly measure the injection position. Simply inject the adhesive into the connecting hole 132 to set the adhesive structure at a preset position on the heat insulation component 13.

[0094] Furthermore, by providing an adhesive structure such as an adhesive liquid in the connection hole 132, the connection between the connector 14 and the bottom cover plate 11 can be achieved. When the battery pack 100 experiences thermal runaway, the adhesive structure provided in the connection hole 132 can also melt or its adhesive strength can be reduced under high temperature and high pressure, thereby breaking the connection between the connector 14 and the bottom cover plate 11 at a certain position.

[0095] In addition, the wall of the connection hole 132 can also limit the adhesive in the connection hole 132, so that the adhesive and other adhesives are not easy to overflow to other positions on the bottom cover plate 11. This effectively prevents the adhesive structure from overflowing to other positions on the bottom cover plate 11. If the bonding area between the connector 14 and the heat insulation component 13 is too large, it will be difficult to disconnect the connection between the connector 14 and the heat insulation component 13 when the battery pack 100 experiences thermal runaway.

[0096] This disclosure does not limit the diameter of the connecting hole 132. In some possible embodiments, the diameter D of the connecting hole 132 satisfies: 2mm≤D≤20mm.

[0097] Since the diameter D of the connecting hole 132 is greater than or equal to 2mm, the connecting hole 132 can have a certain cross-sectional area. The connecting hole 132 with a certain cross-sectional area can make the connector 14 and the bottom guard plate 11 have a certain connection area. The connection between the connector 14 and the bottom guard plate 11 connected by a certain connection area is more reliable, effectively avoiding the situation where the bottom guard plate 11 is easy to fall off the connector 14 due to the small connection area between the connector 14 and the bottom guard plate 11.

[0098] Furthermore, since the aperture D of the connection hole 132 is less than or equal to 20mm, the cross-sectional area of ​​the connection hole 132 will not be too large. This can also effectively prevent the connection between the connector 14 and the bottom guard plate 11 from being too large due to the cross-sectional area of ​​the connection hole 132 being too large. In this case, when the battery pack 100 experiences thermal runaway, the high-temperature and high-pressure gas ejected through the explosion-proof valve and injected into the exhaust channel 15 through the clearance part 123 cannot disconnect the connection between the connector 14 and the bottom guard plate 11.

[0099] In some possible implementations, the diameter D of the connecting hole 132 satisfies: 5mm ≤ D ≤ 10mm.

[0100] Thus, a single connection hole 132 can have a certain connection strength, and it is also beneficial to be blown open by high temperature and high pressure gas when the battery pack 100 experiences thermal runaway, and it can facilitate the disassembly of the bottom protection plate 11.

[0101] In some possible implementations, such as Figure 2 and Figure 9 As shown, the heat insulation component 13 can extend along the first direction, and the heat insulation component 13 is arranged corresponding to the multiple individual cells arranged along the first direction in the battery module 20.

[0102] Compared to the implementation method that requires arranging the heat insulation component 13 at the corresponding position of each battery module 20, the battery box provided in this disclosure only needs to place the heat insulation component 13 extending along the first direction at a preset position on the bottom protective plate 11 to realize the arrangement of the heat insulation component 13 of multiple individual batteries, which is beneficial to simplify the assembly efficiency of the heat insulation component 13 on the bottom protective plate 11, and the structure of the heat insulation component 13 is relatively simple.

[0103] In addition, the heat insulation component 13, which is arranged in relation to the multiple individual cells spaced apart along the first direction, can simultaneously block and insulate the high-temperature and high-pressure gas that is sprayed out of the explosion-proof valve of the multiple individual cells and sprayed into the exhaust channel 15 through the avoidance part 123, which is beneficial to improving the protection effect on the bottom protective plate 11 and the protective layer provided on the bottom protective plate 11.

[0104] In some possible implementations, in the first direction, the heat insulation member 13 and the connector 14 have multiple connection positions, which are staggered relative to each other.

[0105] Multiple staggered connection points help reduce the number of connection points between the heat insulation component 13 and the connector 14. This avoids the situation where too many connection points between the heat insulation component 13 and the connector 14 result in excessively strong connection strength, making it impossible to disconnect at least some of the connections between the heat insulation component 13 and the connector 14 in the event of thermal runaway of the battery pack 100.

[0106] In this disclosure, the heat insulation component 13 can be one or more, as long as it can block and insulate the high-temperature, high-pressure gas ejected from the explosion-proof valves of the multiple battery modules 20 within the battery pack 100 and injected into the exhaust channel 15 via the clearance part 123. As one embodiment of this disclosure, such as... Figure 2 and Figure 9 As shown, there are multiple heat insulation components 13, which are spaced apart on the bottom cover plate 11. For example, the multiple heat insulation components 13 can be spaced apart along the first direction (i.e., the length direction of the battery pack 100) and / or the second direction (i.e., the width direction of the battery pack 100).

[0107] On the one hand, the multiple heat insulation components 13 spaced apart on the bottom protective plate 11 can block and insulate the high-temperature and high-pressure gas ejected from the explosion-proof valves of the multiple battery modules 20 in the battery pack 100 and injected into the exhaust channel 15 through the avoidance part 123; on the other hand, compared with a single heat insulation component 13, the multiple spaced heat insulation components 13 are lighter, which helps to reduce the weight of the entire battery pack 100 and thus helps to improve the energy density of the entire battery pack 100.

[0108] In this disclosure, the heat insulation element 13 can be made of any suitable material, and this disclosure does not limit it. As one embodiment of this disclosure, the heat insulation element 13 may include a mica sheet.

[0109] Mica sheets have high insulation, high temperature resistance, corrosion resistance and good mechanical properties, which can meet the requirements of blocking and heat insulation of high temperature and high pressure gas ejected from the explosion-proof valve of battery module 20.

[0110] As another embodiment of this disclosure, the heat insulation member 13 may also be a heat insulation member made of ceramic or other inorganic non-metallic materials.

[0111] This disclosure does not limit the arrangement of the connector 14 within the exhaust passage 15; in some possible embodiments, such as Figure 2 , Figure 4 , Figure 7 as well as Figure 8 As shown, the connector 14 extends in the second direction within the exhaust channel 15, and the connector 14 is adapted to correspond to a plurality of individual cells arranged in the second direction in the battery module 20.

[0112] Since the connector 14 extending along the second direction is arranged corresponding to multiple individual cells in the battery module 20, the connector 14 can act as a reinforcing beam in the battery box 10, thereby providing additional structural support for the support plate 12, the individual cells set on the support plate 12, and other components in the battery pack 100, which is beneficial to improving the overall strength, stiffness, and modal characteristics of the battery pack 100.

[0113] In some possible implementations, such as Figure 2 , Figure 7 as well as Figure 8 As shown, there are multiple connectors 14, which are spaced apart in the exhaust channel 15 along a direction intersecting the second direction (e.g., the first direction).

[0114] The multiple connectors 14, which are spaced apart along the direction intersecting the extension direction of the connector 14, can simultaneously support the support plate 12, the multiple battery modules 20 disposed on the support plate 12, and other components within the battery pack 100, which is beneficial to further improve the overall strength, rigidity, and modal characteristics of the battery pack 100.

[0115] This disclosure does not limit the specific structure and shape of the connector 14, as long as the connector 14 is suitable for being disposed within the exhaust channel 15. In some possible embodiments, such as Figures 4 to 6 As shown, the connector 14 is a corrugated member with crests 141 and troughs 142 spaced apart in the second direction. One of the crests 141 and troughs 142 is connected to the heat insulation member 13, and the other is connected to the support plate 12.

[0116] The connection between the connector 14 and the heat insulation member 13 and the support plate 12 can be achieved through the crest portion 141 and the trough portion 142, thereby enabling the connection between the support plate 12 and the bottom guard plate 11.

[0117] Furthermore, by setting the connector 14 to a wave shape, it is also beneficial to reduce the weight of the connector 14 itself while achieving the connection between the support plate 12 and the heat insulation plate. This helps to reduce the weight of the entire battery pack 100 and increase the energy density of the battery pack 100.

[0118] In some possible implementations, such as Figure 6 As shown, the crest portion 141 has a first connecting plane 143 for bonding with the support plate 12, and / or the trough portion 142 has a second connecting plane 144 for bonding with the heat insulation member 13.

[0119] The planar first connecting plane 143 facilitates adhesive application, thereby enabling easy connection of the corrugated portion 141 to the support plate 12. Similarly, the planar second connecting plane 144 also facilitates adhesive application, enabling easy connection of the corrugated portion 142 to the heat insulation member 13. Furthermore, the corrugated portion 141 connected to the support plate 12 via the first connecting plane 143 allows for surface-to-surface contact between the corrugated portion 141 and the support plate 12, which increases the connection area and improves the reliability of the connection between the connector 14 and the support plate 12.

[0120] Furthermore, the trough portion 142, which is connected to the heat insulation member 13 via the second connecting plane 144, can also form a surface-to-surface contact with the heat insulation member 13. This is also beneficial to increase the connection area between the trough portion 142 and the support plate 12, thereby improving the connection reliability between the connector 14 and the heat insulation member 13.

[0121] In order to adapt the structure of connector 14 to other components within battery pack 100, in some possible embodiments, such as Figure 4 and Figure 6 As shown, the trough portion 142 is connected to the heat insulation member 13. Along the second direction, the size of the trough portion 142 corresponding to the explosion-proof valve of the battery cell is larger than the size of the trough portion 142 that is misaligned with the explosion-proof valve of the battery cell.

[0122] The larger trough portion 142 corresponding to the explosion-proof valve can be adapted to the size of the heat insulation component 13, making it easy to connect the trough portion 142 to the heat insulation component 13.

[0123] Furthermore, the smaller trough portion 142 that is misaligned with the explosion-proof valve can also be adapted to the position of the flow channel on the support plate 12, which is configured as a liquid cooling plate. In this way, at the position of the smaller trough portion 142 (i.e. the position of the flow channel on the support plate 12), there can be a larger number of crest portions 141. The larger number of crest portions 141 can reliably support the flow channel on the support plate 12.

[0124] This disclosure does not limit the specific type of the support plate 12. The support plate 12 can be a general plate-shaped member, or it can be a plate-shaped member with a certain function. In some possible embodiments, such as Figure 4 As shown, the support plate 12 may include a flow channel plate 121 and a mounting plate 122. The mounting plate 122 is used to mount the battery module 20, and the mounting plate 122 and the flow channel plate 121 are connected and aligned along the height direction of the battery housing 10. That is, the support plate 12 can be constructed as a liquid cooling plate.

[0125] The support plate 12, which is constructed as a liquid cooling plate, can not only install the battery module 20, but also exchange heat with the battery module 20, so that the battery module 20 can always charge and discharge within a suitable temperature range, which is beneficial to improving the charging and discharging efficiency of the battery module 20 and extending its lifespan.

[0126] To improve the strength of connector 14, in some possible implementations, such as Figure 6 and Figure 8 As shown, the connector 14 is also provided with at least one reinforcing rib 145.

[0127] By providing reinforcing ribs 145 on the connector 14, the load can be effectively distributed and transferred, thereby significantly improving the load-bearing capacity and torsional performance of the connector 14, and thus improving the strength of the connector 14.

[0128] In some possible implementations, such as Figure 6 As shown, the reinforcing rib 145 extends along the first direction and / or the second direction.

[0129] The reinforcing ribs 145 extending along the first direction help to improve the load-bearing capacity of the connector 14 in the first direction, thereby further improving the strength, stiffness and modal characteristics of the battery pack 100 using the battery housing 10 in the first direction.

[0130] Furthermore, the reinforcing rib 145 extending along the second direction is in the same direction as the connecting member 14, which can effectively improve the load-bearing capacity of the connecting member 14 in the second direction, thereby further improving the strength, stiffness and modality of the battery pack 100 using the battery housing 10 in the second direction.

[0131] To prevent thermal runaway of the battery pack 100 from damaging the support plate 12, in some possible implementations, such as Figure 8 As shown, the clearance part 123 includes a clearance opening 124 opened on the support plate 12, and the clearance opening 124 corresponds to the valve port of the explosion-proof valve (such as the explosion-proof valve of a single cell battery) of the battery module 20.

[0132] By providing a clearance port 124 on the support plate 12 corresponding to the valve port of the explosion-proof valve of the battery cell, and by providing at least a partial corresponding clearance port 124 to the heat insulation component 13, when the battery pack 100 experiences thermal runaway, the high-temperature and high-pressure gas ejected from the valve port of the explosion-proof valve is not likely to be directly sprayed onto the support plate 12. Instead, it can be sprayed onto the heat insulation component 13 through the clearance port 124. This effectively avoids the situation where the high-temperature and high-pressure gas is directly sprayed onto the support plate 12 when the battery pack 100 experiences thermal runaway, which could easily damage the support plate 12.

[0133] In addition, by providing an avoidance opening 124 on the support, it is possible to prevent the support plate 12 from blocking the gas when the gas is discharged through the valve port of the explosion-proof valve, which would prevent a large amount of gas generated by thermal runaway from being discharged in time and thus cause an explosion. This also helps to improve the safety of the battery pack 100.

[0134] In some possible implementations, the projection of the clearance 124 is located within the projection of the heat insulation member 13 along the axial direction of the clearance 124.

[0135] Since the projection of the clearance opening 124 is located within the projection of the heat insulation component 13, the heat insulation component 13 can be made larger by reasonably designing its size. When the battery pack 100 experiences thermal runaway, the larger size of the heat insulation component 13 can further prevent the high-temperature and high-pressure gas that is ejected through the explosion-proof valve and injected into the exhaust channel 15 through the clearance opening 124 from being directly sprayed onto the bottom guard plate 11. This is beneficial to further improve the protection effect of the bottom guard plate 11 and the protective layer provided on the bottom guard plate 11.

[0136] In addition to being a clearance opening 124, in other embodiments, the clearance portion 123 can be, for example, a thin film or other structure with weak structural strength that can be broken open in the event of thermal runaway.

[0137] This disclosure does not limit the specific connection method between the first end of the connector 14 and the support plate 12, as long as the connector 14 can be reliably connected to the support plate 12. In one embodiment of this disclosure, the connector 14 is bonded to the support plate 12.

[0138] The connection between the connector 14 and the support plate 12 by adhesive bonding is relatively convenient and helps to improve the assembly efficiency between the connector 14 and the support plate 12.

[0139] In other embodiments of this disclosure, the connector 14 may also be connected to the support plate 12 by welding or screwing, and this disclosure does not limit this.

[0140] According to a second aspect of this disclosure, a battery pack 100 is provided, including a battery module 20 and a battery housing 10 as described above, wherein the battery module 20 is disposed within the battery housing 10.

[0141] The battery pack 100 has all the beneficial effects of the battery housing 10 described above, which will not be repeated here.

[0142] In some possible implementations, the battery module 20 may be provided with multiple individual batteries, which may be connected in series and / or in parallel to form the battery module 20. In addition, the battery pack 100 may be provided with multiple battery modules 20, which may be connected in series and / or in parallel to form the battery pack 100.

[0143] In some possible implementations, such as Figure 1 and Figure 2 As shown, the battery box 10 may include a tray 101 and a top cover 102. The tray 101 includes a bottom plate structure 1 and a frame 103. The bottom plate structure 1 may include the bottom protective plate 11, the support plate 12, the heat insulation component 13, and the connector 14 mentioned above.

[0144] The tray 101 and the top cover 102 work together to provide space for components (such as battery module 20) inside the battery pack, and also protect the components (such as battery module 20) located in the tray 101 and the top cover 102.

[0145] According to a third aspect of this disclosure, an electrical device is provided, including a device body and a battery pack 100 as described above, the battery pack 100 being used to supply power to the device body.

[0146] This electrical device has all the beneficial effects of the aforementioned battery box 10 or electrical device, which will not be elaborated here.

[0147] It should be noted that this disclosure does not limit the specific type of electrical equipment. The aforementioned electrical equipment may be a vehicle or other electrical equipment suitable for using the aforementioned battery pack 100, and this disclosure does not limit it in this regard.

[0148] In one embodiment of this disclosure, the electrical equipment may be a vehicle. In this case, the main body of the equipment may be any part of the vehicle other than the battery pack 100. For example, the main body of the equipment may be a motor or the like on the vehicle.

[0149] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0150] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0151] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A battery housing, characterized in that, include: Bottom guard plate; A support plate is used to support the battery module. There is an exhaust channel between the support plate and the bottom protective plate. The support plate is provided with a clearance part, which is used to allow gas from the explosion-proof valve of the battery module to enter the exhaust channel. A heat insulation element is disposed on the side of the bottom protective plate facing the support plate and is at least partially opposite to the clearance portion; as well as A connector, disposed within the exhaust channel, is used to connect the support plate and the heat insulation component; The connector is configured to disconnect the connection between the support plate and the thermal insulation member at least partially in the event of thermal runaway of the battery pack.

2. The battery housing according to claim 1, characterized in that, The heat insulation component is provided with a plurality of connecting parts, which are spaced apart from each other and connected to the connecting parts. The connector is configured to detach from at least a portion of the connection in the event of thermal runaway of the battery pack.

3. The battery housing according to claim 2, characterized in that, The connecting part is bonded to the connector.

4. The battery housing according to claim 3, characterized in that, The connecting portion includes a connecting hole formed in the heat insulation member, and the connecting hole is bonded to the connecting member.

5. The battery housing according to claim 4, characterized in that, The diameter D of the connecting hole satisfies: 2mm≤D≤20mm.

6. The battery housing according to any one of claims 1-5, characterized in that, The heat insulation component extends along a first direction, and the heat insulation component is arranged correspondingly to a plurality of individual cells arranged along the first direction in the battery module.

7. The battery housing according to claim 6, characterized in that, In the first direction, there are multiple connection positions between the heat insulation member and the connector, and the multiple connection positions are staggered.

8. The battery housing according to any one of claims 1-5, characterized in that, The number of heat insulation components is multiple, and the multiple heat insulation components are spaced apart on the bottom protective plate.

9. The battery housing according to any one of claims 1-5, characterized in that, The insulation component includes a mica sheet.

10. The battery housing according to any one of claims 1-5, characterized in that, The connector extends in the second direction within the exhaust passage; The connector is adapted to correspond to a plurality of individual cells arranged along the second direction in the battery module.

11. The battery housing according to claim 10, characterized in that, The number of connectors is multiple, and the multiple connectors are spaced apart in the exhaust channel along a direction intersecting the second direction.

12. The battery housing according to claim 10, characterized in that, The connector is a corrugated member, having crests and troughs spaced apart in the second direction; One of the crests and troughs is connected to the heat insulation component, and the other is connected to the support plate.

13. The battery housing according to claim 12, characterized in that, The crest portion has a first connecting plane, which is used to bond with the support plate; and / or The trough portion has a second connecting plane, which is used to bond with the heat insulation component.

14. The battery housing according to claim 12, characterized in that, The trough portion is connected to the heat insulation component; Along the second direction, the size of the trough corresponding to the avoidance portion among the plurality of trough portions is larger than the size of the trough portion that is misaligned with the avoidance portion.

15. The battery housing according to any one of claims 1-5, characterized in that, The clearance portion includes a clearance opening formed in the support plate, and the clearance opening corresponds to the valve port of the explosion-proof valve of the battery module.

16. A battery pack, characterized in that, Includes a battery module and a battery housing according to any one of claims 1-15; The battery module is housed within the battery casing.

17. An electrical appliance, characterized in that, It includes a device body and a battery pack according to claim 16, the battery pack being used to supply power to the device body.

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