Battery device, power utilization device and energy storage device

Abstract

The embodiment of the utility model discloses a battery device, a power utilization device and an energy storage device. The battery device comprises at least two battery monomers, each battery monomer comprises a shell, the shell comprises a first shell wall, the first shell wall is located at the end of at least one side of the shell in the gravity direction, and the first shell wall comprises a body part and a protruding part protruding in the gravity direction relative to the body part; an electrode terminal provided on the main body part; and along the gravity direction, the plurality of battery monomers are stacked, and the lug bosses abut against the adjacent battery monomers. According to the embodiment of the invention, the space utilization rate of the battery device can be improved, so that the volume utilization rate of the battery device is improved, and the energy of the battery device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device, a power utilization device and an energy storage device. BACKGROUND

[0002] With the popularization of the concept of green development, new energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like.

[0003] In order to improve the energy of the battery device, the battery device usually includes a plurality of battery monomers arranged. The arrangement of the battery monomers has an influence on the volume utilization rate of the battery device. In addition, the industry continues to put forward higher requirements for the volume utilization rate and energy density of the battery device. Therefore, further optimizing the arrangement direction of the battery monomers and improving the volume utilization rate of the battery device is one of the research topics. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the embodiments of the present application provide a battery device, a power utilization device and an energy storage device capable of improving the volume utilization rate.

[0005] In a first aspect, the embodiments of the present application provide a battery device, which includes at least two battery monomers. Each battery monomer includes: a shell including a first shell wall, the first shell wall being located at at least one side end of the shell along a gravity direction, the first shell wall including a body portion and a protruding portion protruding from the body portion along the gravity direction; and an electrode terminal arranged in the body portion. The plurality of battery monomers are stacked along the gravity direction, and the protruding portion abuts against an adjacent battery monomer.

[0006] Since the first shell wall includes the body portion and the protruding portion, the electrode terminal is arranged in the body portion, and the plurality of battery monomers are stacked along the gravity direction and the protruding portion abuts against the adjacent battery monomer, the plurality of battery monomers can be arranged in multiple layers along the gravity direction, and the plurality of battery monomers stacked along the gravity direction occupy as little space as possible in the gravity direction, thereby improving the volume utilization rate of the battery device. Moreover, in the case that the horizontal space for installing the battery device is limited, the plurality of battery monomers can be arranged in multiple layers by fully utilizing the space in the gravity direction, thereby improving the space utilization rate and the energy of the battery device. In addition, since the first shell wall has the protruding portion, the strength and rigidity of the first shell wall can be improved, thereby improving the support stability of the adjacent battery monomer, which is conducive to stacking the plurality of battery monomers along the gravity direction.

[0007] In some embodiments, in the first shell wall, the body portion and the protruding portion are connected along a first direction, the first shell wall includes one protruding portion, and the electrode terminal is located on one side or both sides of the protruding portion along the first direction, and the first direction is perpendicular to the gravity direction.

[0008] Thus, the entire protruding portion can be used to support the adjacent battery cell, which is conducive to improving the support stability; and the position of the electrode terminal can be flexibly designed.

[0009] In some embodiments, on the first shell wall, the body portion and the protruding portion are connected along a first direction, the first shell wall comprises at least two protruding portions, and the electrode terminal is located between two adjacent protruding portions along the first direction, and the first direction is perpendicular to the direction of gravity.

[0010] Thus, by abutting the at least two protruding portions against the adjacent battery cell and locating the electrode terminal between the adjacent protruding portions, the support stability in the direction of gravity can be improved. Moreover, the position of the electrode terminal can be flexibly designed.

[0011] In some embodiments, on the first shell wall, the body portion and the protruding portion are connected along a first direction, the shell further comprises two second shell walls oppositely arranged along the first direction, and the battery cell further comprises a pressure relief component, and the pressure relief component is arranged on at least one second shell wall, and the first direction is perpendicular to the direction of gravity.

[0012] Since the pressure relief component is arranged on the second shell wall instead of the first shell wall where the electrode terminal is located, it is not necessary to leave a channel for discharging the pressure relief gas in the direction of gravity, which is conducive to reducing the space occupied by the plurality of battery cells stacked in the direction of gravity, improving the volume utilization rate; and the probability of the eruption of the pressure relief component falling on the electrode terminal when the pressure relief component is relieved can be reduced, realizing the separation of electricity and gas, and reducing the risk of short circuit or even fire caused by thermal runaway of the battery cell.

[0013] In some embodiments, the shell further comprises two third shell walls, and the area of the first shell wall and the second shell wall is smaller than the area of the third shell wall.

[0014] Thus, since the pressure relief component is not formed on the third shell wall with a larger area, the space occupied by the channel for discharging the pressure relief gas can be reduced, further improving the space utilization rate in the battery device.

[0015] In some embodiments, the plurality of battery cells form a plurality of battery cell groups, each battery cell group comprises a plurality of battery cells stacked in the direction of gravity, and the plurality of battery cell groups comprise a first battery cell group and a second battery cell group, the first battery cell group and the second battery cell group are arranged along the first direction in a manner that they are spaced apart along the first direction, and at least part of the battery cells in the first battery cell group and / or at least part of the battery cells in the second battery cell group are arranged such that the respective pressure relief components face the spacing.

[0016] Since the plurality of battery monomers form a plurality of battery monomer groups, each battery monomer group includes a plurality of battery monomers stacked along the gravity direction, the battery device can include more battery monomers and provide higher energy; since at least part of the battery monomers in the first battery monomer group and / or at least part of the battery monomers in the second battery monomer group are arranged with the respective pressure relief components facing the spacing, the first battery monomer group and the second battery monomer group can share the spacing, which is conducive to improving the space utilization in the battery device; and the pressure relief components of the partial battery monomers can face the spacing, which is also conducive to flexibly designing the arrangement direction of the battery monomers.

[0017] In some embodiments, the first battery monomer group and the second battery monomer group are arranged such that the pressure relief components of each battery monomer in the first battery monomer group and the pressure relief components of each battery monomer in the second battery monomer group both face the spacing.

[0018] Therefore, the first battery monomer group and the second battery monomer group share the spacing, which is conducive to improving the space utilization in the battery device.

[0019] In some embodiments, the pressure relief components of each battery monomer in the first battery monomer group and the pressure relief components of each battery monomer in the second battery monomer group are arranged staggered along the gravity direction.

[0020] Thus, since the pressure relief components of the battery monomers are arranged staggered along the gravity direction, the probability of the eruption material polluting or damaging the pressure relief components of the battery monomers on the opposite side when the pressure relief components release pressure can be reduced, and the risk of thermal diffusion in the first direction when the battery monomers are in thermal runaway can be reduced.

[0021] In some embodiments, in the same projection plane perpendicular to the first direction, the projection of the pressure relief components of each battery monomer in the first battery monomer group and the projection of the pressure relief components of each battery monomer in the second battery monomer group do not overlap.

[0022] Thus, since the pressure relief components of the battery monomers are arranged staggered along the gravity direction, the probability of the eruption material polluting or damaging the pressure relief components of the battery monomers on the opposite side when the pressure relief components release pressure can be reduced, and the risk of thermal diffusion in the first direction when the battery monomers are in thermal runaway can be reduced.

[0023] In some embodiments, in the same battery monomer group, the pressure relief components of at least one battery monomer are different from the pressure relief components of other battery monomers.

[0024] Thus, not only can the arrangement direction of the battery monomers be flexibly designed, but also the probability of the eruption material polluting or damaging the pressure relief components of the battery monomers adjacent along the gravity direction when the pressure relief components release pressure can be reduced, and the risk of thermal diffusion along the gravity direction when the battery monomers are in thermal runaway can be reduced.

[0025] In some embodiments, in the same battery cell group, the directions of the pressure relief components of the battery cells adjacent in the gravity direction are opposite in the first direction, and in the same layer, the directions of the pressure relief components of the battery cells in the first battery cell group and the second battery cell group are the same.

[0026] Thus, since in the same battery cell group, the directions of the pressure relief components of the battery cells adjacent in the gravity direction are opposite in the first direction, the probability that the eruption of the pressure relief components pollutes or damages the pressure relief components of the battery cells adjacent in the gravity direction when the pressure relief components release pressure can be reduced; since in the same layer, the directions of the pressure relief components of the battery cells are the same in the first direction, the eruption of the pressure relief components almost cannot pollute or damage the pressure relief components of the battery cells on the opposite side when the pressure relief components release pressure. Therefore, the risk of thermal diffusion in the gravity direction and the risk of thermal diffusion in the first direction when the battery cells are in thermal runaway can be reduced.

[0027] In some embodiments, the battery cells in the first battery cell group and the battery cells in the second battery cell group are arranged such that the directions of the pressure relief components of the battery cells are the same.

[0028] Thus, since the directions of the pressure relief components of the battery cells are the same, the eruption of the pressure relief components almost cannot pollute or damage the pressure relief components of the battery cells on the opposite side in the first direction when the pressure relief components release pressure, and the risk of thermal diffusion in the first direction when the battery cells are in thermal runaway can be reduced; and the manufacture and grouping of the battery cells are facilitated, and the assembly efficiency of the battery device is improved.

[0029] In some embodiments, the plurality of battery cell groups further comprises a third battery cell group, the directions of the pressure relief components of the battery cells in the third battery cell group are the same as the directions of the pressure relief components of the battery cells in the first battery cell group in the first direction, and the second battery cell group is located between the first battery cell group and the third battery cell group in the first direction.

[0030] Thus, more battery cells can be arranged flexibly, and the grouping efficiency is high. In addition, the third battery cell group is located on the side of the second battery cell group away from the first battery cell group in the first direction, and the pressure relief components are located on the side of the third battery cell group away from the second battery cell group, so that the second battery cell group and the third battery cell group can be arranged close to or even in contact with each other in the first direction, thereby further improving the space utilization and the energy of the battery device.

[0031] In some embodiments, the plurality of battery cells form a plurality of battery cell groups, each battery cell group comprising a plurality of battery cells stacked along the gravity direction, the plurality of battery cell groups comprising a second battery cell group and a third battery cell group, the second battery cell group and the third battery cell group being arranged along the first direction, and the pressure relief component of each battery cell in the third battery cell group being oriented along the first direction away from the second battery cell group, and the pressure relief component of each battery cell in the second battery cell group being oriented along the first direction away from the third battery cell group.

[0032] In this way, the pressure relief components of the two battery cell groups can be arranged further apart, greatly reducing the risk of thermal diffusion along the first direction when the battery cells are in thermal runaway. In addition, the passage for discharging the gas sprayed by the pressure relief components can be arranged on both sides of the two battery cell groups, which is conducive to the use of the space on both sides.

[0033] In some embodiments, the housing further comprises a fourth housing wall, the first housing wall being located on one side of the housing along the gravity direction, and the fourth housing wall being located on the other side of the housing along the gravity direction, the plurality of battery cells forming a plurality of battery cell groups, each battery cell group comprising a plurality of battery cells stacked along the gravity direction, in the same battery cell group, the protrusion of one of the two adjacent battery cells located below along the gravity direction abutting against the fourth housing wall of the other battery cell located above; or, in the same battery cell group, the protrusion of one of the two adjacent battery cells located above along the gravity direction abutting against the fourth housing wall of the other battery cell located below.

[0034] In this way, the battery cells can be stacked in a direction with the protrusions (electrode terminals) facing upwards, or in a direction with the protrusions (electrode terminals) facing downwards, or in a mixed arrangement of the two directions. Therefore, not only can the arrangement flexibility of the orientation of the battery cells be improved, but also the pressure relief components can be easily staggered by changing the orientation of the battery cells, so that two types of battery cells with different positions of the pressure relief components do not need to be prepared, which is conducive to simplifying the manufacturing process of the battery cells, improving production efficiency, and reducing production cost.

[0035] In some embodiments, the first housing wall is located on the same side of the housing along the gravity direction between the battery cells.

[0036] In this way, all the battery cells can be arranged in the same orientation along the gravity direction, which is conducive to simplifying the assembly process.

[0037] In some embodiments, the plurality of battery cell groups comprises a fifth battery cell group and a sixth battery cell group, in the fifth battery cell group, the first casing wall of each battery cell is located at a first side of the outer shell along the gravity direction, and the fourth casing wall is located at a second side of the outer shell along the gravity direction, in the sixth battery cell group, the first casing wall of each battery cell is located at the second side of the outer shell along the gravity direction, and the fourth casing wall is located at the first side of the outer shell along the gravity direction.

[0038] Thus, by changing the orientation of the battery cells, the pressure relief components between the battery cells adjacent along the first direction can be easily staggered, so that it is not necessary to prepare two types of battery cells with different positions of the pressure relief components, which is conducive to simplifying the manufacturing process of the battery cells, improving production efficiency, and reducing production cost.

[0039] In some embodiments, the first casing wall comprises a body portion and a protrusion portion connected along the first direction, the plurality of battery cells form a plurality of battery cell groups, each battery cell group comprises a plurality of battery cells stacked along the gravity direction, and the plurality of battery cell groups are arranged along the second direction, wherein the first direction, the second direction, and the gravity direction are perpendicular to each other.

[0040] Thus, the battery device can include more battery cells, so that the grouping efficiency can be improved, the space utilization can be improved, and the energy of the battery device can be improved.

[0041] In some embodiments, the outer shell further comprises two second casing walls arranged opposite along the first direction, the pressure relief component is arranged on at least one second casing wall, and adjacent battery cells abut each other along the second direction.

[0042] Since the pressure relief component is arranged on the second casing wall, it is not necessary to leave a pressure relief channel between the battery cells arranged along the gravity direction and the second direction, so that the space occupation along the gravity direction and the second direction can be reduced, the space utilization can be improved, and electrical and gas separation can be achieved.

[0043] In some embodiments, one side or both sides of each battery cell group along the first direction has a channel extending along the second direction, and the pressure relief port of the pressure relief component faces the channel along the first direction and communicates with the channel.

[0044] By designing the number and position of the channel and making the pressure relief port of each battery cell face the channel, the eruption material erupted when any one battery cell experiences thermal runaway can enter the channel, which reduces the influence of the eruption material on adjacent battery cells, and further reduces the risk of thermal diffusion.

[0045] In some embodiments, the plurality of battery cell groups includes a plurality of first battery cell groups and a plurality of second battery cell groups, the channel includes a first channel, the plurality of first battery cell groups and the plurality of second battery cell groups are arranged along a second direction respectively, and each first battery cell group and each second battery cell group are oppositely arranged along a first direction at intervals along the first direction, the intervals are communicated along the second direction to form the first channel, and the pressure relief components of each battery cell in the first battery cell groups and the pressure relief components of each battery cell in the second battery cell groups are both directed towards the first channel along the first direction and communicated with the first channel.

[0046] Thus, the first channel can be shared by the first battery cell groups and the second battery cell groups, which is conducive to improving the space utilization in the battery device.

[0047] In some embodiments, the first channel includes a first passage and a second passage, and the first passage and the second passage are separated by the partition in the first direction.

[0048] Thus, the oppositely arranged pressure relief components along the first direction can be reliably separated by the partition, so as to further reduce the risk of thermal runaway of the battery cells and the risk of thermal diffusion of the battery cells along the first direction.

[0049] In some embodiments, the distance between the second housing walls directed towards the first channel along the first direction is in the range of 14mm to 20mm.

[0050] By having a suitable distance between the oppositely arranged second housing walls directed towards the first channel along the first direction, the space utilization and the risk of thermal diffusion can be considered.

[0051] In some embodiments, the distance between the second housing walls directed towards the first channel along the first direction and the partition is in the range of 7mm to 10mm.

[0052] Thus, on the one hand, the oppositely arranged pressure relief components along the first direction are reliably separated by the partition, and on the other hand, a suitable pressure relief passage is left for the pressure relief components on both sides of the partition, so as to reduce the risk of contamination or damage of the pressure relief components of the battery cells along the first direction when the battery cells are in thermal runaway, and also reduce the risk of local overheating due to limited pressure relief space, which may further trigger larger-scale thermal runaway and other adverse conditions.

[0053] In some embodiments, the plurality of battery cell groups further comprises a plurality of third battery cell groups, the plurality of third battery cell groups are arranged along the second direction, the channel comprises a first channel and a second channel, along the first direction, the first channel is located at a side of the second battery cell group close to the first battery cell group, and the second channel is located at a side of the third battery cell group away from the second battery cell group, the pressure relief components of the battery cells in the first battery cell group and the pressure relief components of the battery cells in the second battery cell group are directed towards and communicated with the first channel along the first direction, and the pressure relief components of the battery cells in the third battery cell group are directed towards and communicated with the second channel along the first direction.

[0054] In this way, the space utilization can be improved when more battery cells are arranged, and the risk of heat diffusion can be reduced by providing a pressure relief channel for each battery cell.

[0055] In some embodiments, the plurality of battery cell groups comprises a plurality of first battery cell groups and a plurality of second battery cell groups, the channel comprises a first channel and a second channel, the plurality of first battery cell groups and the plurality of second battery cell groups are arranged along the second direction respectively, and each first battery cell group and each second battery cell group are arranged along the first direction in a spaced-apart manner along the first direction, the spaces are communicated to form the first channel along the second direction, along the first direction, the first channel is located at a side of the second battery cell group close to the first battery cell group, and the second channel is located at a side of the second battery cell group away from the first battery cell group, the pressure relief components of the battery cells in the first battery cell group are directed towards and communicated with the first channel along the first direction, and the pressure relief components of the battery cells in the second battery cell group are directed towards and communicated with the second channel along the first direction.

[0056] Since the pressure relief components of the first battery cell group and the pressure relief components of the second battery cell group are relieved through two pressure relief channels respectively, the eruption of the pressure relief components when relieved will hardly contaminate or damage the pressure relief components of the battery cells on the opposite side. Therefore, the risk of heat diffusion along the first direction when the battery cells are in thermal runaway can be reliably reduced.

[0057] In some embodiments, the battery cell has an electrode assembly located in the shell; the electrode terminal comprises a first electrode terminal plate and a second electrode terminal plate, the first electrode terminal plate and the second electrode terminal plate are located at a side of the first shell wall away from the electrode assembly along the direction of gravity, and the projection of the first electrode terminal plate and the projection of the second electrode terminal plate at least partially overlap in the same projection plane perpendicular to the second direction.

[0058] Thus, the first electrode terminal plate and the second electrode terminal plate can be arranged compactly along the first direction, reducing the occupied space in the first direction, so that the protruding portion can be designed larger, improving the support stability; moreover, designing the protruding portion larger is conducive to improving the support area, thereby improving the support strength and support rigidity, and facilitating stacking more battery monomers along the gravity direction.

[0059] In some embodiments, the first electrode terminal plate and the second electrode terminal plate of each battery monomer located at the same layer along the gravity direction are arranged alternately along the second direction, the polarities of the first electrode terminal plate and the second electrode terminal plate are opposite, and the battery device further comprises a busbar, the adjacent first electrode terminal plate and the second electrode terminal plate in the two adjacent battery monomers along the second direction are connected through the busbar.

[0060] Thus, the electrical connection between the adjacent battery monomers along the second direction can be easily realized.

[0061] In some embodiments, along the gravity direction, towards the side of the protruding portion protruding, the busbar does not exceed the protruding portion.

[0062] Thus, the size along the gravity direction of each battery monomer group will not increase due to the arrangement of the busbar, so as to facilitate improving the volume utilization.

[0063] In some embodiments, along the gravity direction, the battery device comprises a plurality of battery monomer layers, each battery monomer layer is stacked along the gravity direction, the same battery monomer layer comprises a plurality of battery monomers, and the battery device further comprises a plurality of support plates, the support plates are located between the adjacent battery monomer layers along the gravity direction, and the adjacent battery monomer layers abut against each other through the support plates.

[0064] Thus, the pressure borne by the battery monomers of the lower layer can be dispersed, the stacking stability along the gravity direction can be improved, and the number of stacked layers along the gravity direction can be increased, thereby improving the volume utilization and energy of the battery device.

[0065] In some embodiments, in the same battery monomer layer, part or all of the plurality of battery monomers arranged along the first direction abut against the same support plate; and / or, in the same battery monomer layer, part or all of the plurality of battery monomers arranged along the second direction abut against the same support plate; and / or, the support plate is configured to be at least the surface is insulating; and / or, along the gravity direction, the battery monomer is at least one side bonded to the support plate.

[0066] Thus, the pressure borne by the battery monomers of the lower layer can be dispersed, and the integrity of the battery monomers in the same battery monomer layer can be improved, thereby further improving the stacking stability along the gravity direction; moreover, the insulating property of the support plate is conducive to reducing the risk of electric leakage.

[0067] In some embodiments, the battery device further comprises a box body, at least one end of the support plate is supported on a box wall of the box body; and / or, the battery device further comprises a box body and a beam member arranged on the box body, at least one end of the support plate is supported on the beam member.

[0068] In this way, the pressure borne by the lower-layer battery cells can be dispersed by the support plate supported on the box wall or the beam member, the stacking stability in the gravity direction can be improved, the stacking layer number in the gravity direction can be increased, and the volume utilization and energy of the battery device can be improved.

[0069] In some embodiments, the battery device further comprises a heat exchange plate, the heat exchange plate is located between the battery cells adjacent in the second direction, the battery cells adjacent in the second direction abut each other through the heat exchange plate, and the plurality of battery cells arranged in the first direction abut the same heat exchange plate.

[0070] In this way, not only the stacking stability can be improved by the support plate, but also the battery cells can be heat managed, and the use reliability of the battery device can be improved.

[0071] In some embodiments, the thickness of the support plate is in the range of 2mm to 7mm; and / or, the thickness of the support plate is in the range of 3mm to 6mm.

[0072] In this way, the support plate with a suitable thickness is conducive to improving the stacking stability and improving the volume utilization; and a design space is provided for designing the support plate as a heat management component.

[0073] In some embodiments, the support plate comprises a heat management component.

[0074] In this way, the support plate not only improves the stacking stability of the battery cells as described above, but also heat manages the battery cells, improves the use reliability of the battery device; and no additional heat management component needs to be arranged, so the volume utilization can be improved.

[0075] In some embodiments, along the first direction, the body part and the protruding part are connected on the first shell wall, and the length of the first shell wall in the first direction is in the range of 120mm to 1200mm.

[0076] In this way, the embodiments of the present application can be applied to battery cells of various length specifications according to actual conditions, and then a battery device with a matching installation space, high volume utilization and high energy can be made; and the battery cells are designed to be longer, which is conducive to reducing the proportion of space occupied by the pressure relief channel and improving the space utilization.

[0077] In some embodiments, the length of the first shell wall in the first direction is in the range of 120mm to 600mm.

[0078] Therefore, the embodiments of the present application can be applied to battery monomers of various length specifications according to actual conditions, and a battery device with high volume utilization and high energy that matches the installation space of the battery device can be further manufactured.

[0079] In some embodiments, the length of the first housing wall along the first direction is in the range of 150mm to 400mm.

[0080] Therefore, the embodiments of the present application can be applied to battery monomers of various length specifications according to actual conditions, and a battery device with high volume utilization and high energy that matches the installation space of the battery device can be further manufactured.

[0081] In some embodiments, the ratio of the length of the protruding part along the first direction to the length of the first housing wall along the first direction is greater than 50% and less than 98%.

[0082] Therefore, by designing the protruding part to be more than half of the length of the first housing wall along the first direction, a large enough contact surface is provided to provide support, which is conducive to improving the stability of the stack along the direction of gravity.

[0083] In some embodiments, the width of the first housing wall along the second direction is in the range of 12mm to 90mm, wherein the first direction, the second direction and the direction of gravity are perpendicular to each other.

[0084] Therefore, the embodiments of the present application can be applied to battery monomers of various width specifications according to actual conditions, and a battery device with high volume utilization and high energy that matches the installation space of the battery device can be further manufactured.

[0085] In some embodiments, the width of the first housing wall along the second direction is in the range of 25mm to 45mm.

[0086] Therefore, the embodiments of the present application can be applied to battery monomers of various width specifications according to actual conditions, and a battery device with high volume utilization and high energy that matches the installation space of the battery device can be further manufactured.

[0087] In some embodiments, the maximum height of the battery monomer along the direction of gravity is in the range of 80mm to 250mm.

[0088] Therefore, the embodiments of the present application can be applied to battery monomers of various height specifications according to actual conditions, and a battery device with high volume utilization and high energy that matches the installation space of the battery device can be further manufactured.

[0089] In some embodiments, the maximum height of the battery monomer along the direction of gravity is in the range of 100mm to 200mm.

[0090] Therefore, the application can be applied to battery cells of various height specifications according to actual conditions, and a battery device with a high volume utilization rate and high energy can be made to match the installation space of the battery device.

[0091] In some embodiments, the shell comprises at least one of a steel shell, an aluminum shell, and a titanium alloy shell; and / or, the shell has a shell wall thickness in a range of 0.1 mm to 2.0 mm; and / or, the shell has a hardness in a range of Vickers hardness HV10 to HV400.

[0092] Therefore, since the steel shell, the aluminum shell, and the titanium alloy shell can be used, not only can welding be easily performed, but even if a commonly used shell material is used, multilayer stacking in the gravity direction can be achieved, and the volume utilization rate can be improved; since the shell has a suitable thickness, the rigidity and the volume utilization rate of the shell can be balanced; and since the shell has a suitable hardness, the rigidity, the volume utilization rate, and the ease of processing of the shell can be balanced.

[0093] In some embodiments, the battery cell further comprises an electrode assembly, the shell has a plurality of shell walls including the first shell wall, the plurality of shell walls define a closed accommodation space, the electrode assembly is accommodated in the accommodation space, among the plurality of shell walls, two second shell walls are oppositely arranged along a first direction, and the ratio of the length of the electrode assembly to the distance between the opposite wall surfaces of the two second shell walls along the first direction is greater than 90% and less than 100%.

[0094] Therefore, not only can the battery cell and even the battery device have a high volume utilization rate, but a certain supporting force can be provided by the electrode assembly to reduce the degree of bending deformation of the second shell wall along the first direction.

[0095] In some embodiments, among the plurality of shell walls, two third shell walls are oppositely arranged along a second direction, and the ratio of the width of the electrode assembly to the distance between the opposite wall surfaces of the two third shell walls along the second direction is greater than 90% and less than 100%.

[0096] Therefore, not only can the battery cell and even the battery device have a high volume utilization rate, but a certain supporting force can be provided by the electrode assembly to reduce the degree of bending deformation of the third shell wall in the second direction within a range close to the full length along the first direction.

[0097] In some embodiments, among the plurality of shell walls, the first shell wall and a fourth shell wall are oppositely arranged along the gravity direction, and the ratio of the height of the electrode assembly to the distance between the opposite wall surfaces of the first shell wall and the fourth shell wall along the gravity direction is greater than 80% and less than 100%.

[0098] Therefore, the battery monomer and the battery device can have a high volume utilization rate, and the electrode assembly can provide a certain supporting force, reduce the degree of bending deformation of the first shell wall along the gravity direction in a range close to the full length along the first direction, and reduce the degree of bending deformation of the second shell wall along the first direction in a range close to the overall height along the gravity direction.

[0099] In some embodiments, the battery device further includes a box, the plurality of battery monomers form a plurality of battery monomer groups, each battery monomer group includes a plurality of battery monomers stacked along the gravity direction, each battery monomer group is accommodated in the box, and the box has a top plate and a bottom plate opposite along the gravity direction, and each battery monomer group abuts against at least one of the top plate and the bottom plate.

[0100] Therefore, the stacking stability of the battery monomer group can be improved, and the space utilization rate can be further improved when each battery monomer group abuts against both the top plate and the bottom plate (directly or indirectly).

[0101] In a second aspect, the embodiments of the present application further provide a power utilization device, which includes the battery device provided in the first aspect of the embodiments of the present application, and the battery device is used to store electric energy and supply power for the power utilization device.

[0102] Since the battery device can improve the volume utilization rate as described above, the space occupied by the battery device in the power utilization device can be reduced, or the battery device installation space in the power utilization device can be fully utilized, the energy of the battery device can be improved, and the endurance of the power utilization device can be improved.

[0103] In a third aspect, the embodiments of the present application further provide an energy storage device, which includes the battery device provided in the first aspect of the embodiments of the present application, and the battery device is used to store electric energy and supply electric energy.

[0104] Since the battery device can improve the volume utilization rate as described above, the volume of the energy storage device can be reduced, or the storage energy of the energy storage device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0105] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals in the drawings denote the same elements. In the drawings:

[0106] Figure 1 A structural schematic diagram of a vehicle is provided for some embodiments of the present application;

[0107] Figure 2Structural diagram of an energy storage device provided for some embodiments of the present application;

[0108] Figure 3 Structural diagram of a battery device provided for some embodiments of the present application;

[0109] Figure 4 Exploded perspective diagram of a battery cell provided for some embodiments of the present application;

[0110] Figure 5 Perspective diagram of a battery cell provided for some embodiments of the present application;

[0111] Figure 6 Perspective diagram of an electrically connected battery cell provided for some embodiments of the present application;

[0112] Figure 7 Perspective diagram of a battery cell provided for yet some embodiments of the present application;

[0113] Figure 8 Perspective diagram of a battery cell provided for still some embodiments of the present application;

[0114] Figure 9 Perspective diagram of a battery cell provided for still yet some embodiments of the present application;

[0115] Figure 10 Perspective diagram of a battery cell in an arrangement provided for some embodiments of the present application;

[0116] Figure 11 Perspective diagram of battery cells in a stacked and arranged state provided for some embodiments of the present application;

[0117] Figure 12 Perspective diagram of battery cells in a stacked and arranged state provided for some other embodiments of the present application;

[0118] Figure 13 Perspective diagram of battery cells in a stacked and arranged state provided for yet some embodiments of the present application;

[0119] Figure 14 Diagram of battery cells in a stacked and arranged state provided for some embodiments of the present application;

[0120] Figure 15 Perspective diagram of battery cells in a stacked and arranged state provided for still yet some embodiments of the present application;

[0121] Figure 16 Perspective diagram of battery cells in a stacked and arranged state provided for still yet some other embodiments of the present application;

[0122] Figure 17 A perspective view of a battery cell in a stacked and arranged state is provided for yet other embodiments of the present application.

[0123] BRIEF DESCRIPTION OF DRAWINGS

[0124] 1000 vehicle; 100 battery device; 200 controller; 300 motor; 2000 energy storage device; 400 electrical cabin; 10 battery cell; 20 box; 20A upper box; 20B lower box; 201 box wall; 30 battery cell group; 301 first battery cell group; 302 second battery cell group; 303 third battery cell group; 304 fourth battery cell group; 305 fifth battery cell group; 306 sixth battery cell group; 1 housing; 11 first housing wall; 111 body portion; 112 protruding portion; 12 second housing wall; 13 third housing wall; 14 fourth housing wall; 2 electrode terminal; 21 first electrode terminal plate; 22 second electrode terminal plate; 3 pressure relief component; 4 interval; 41 first passage; 411 first passageway; 412 second passageway; 42 second passage; 5 tab; 6 electrode assembly; 7 busbar; 8 support plate; 9 partition; Z gravity direction; X first direction; Y second direction. DETAILED DESCRIPTION

[0125] It should be noted that the embodiments and technical features in the present application can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation of the purpose of the present application, and should not be regarded as an improper limitation of the present application.

[0126] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the terms "comprising" and "having," and any variations thereof, as used herein are intended to cover a non-exclusive inclusion.

[0127] In the description of the present application, the technical terms "first", "second", "third", "fourth", "fifth", "sixth" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0128] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0129] In the description of the application, the term "and / or" is merely used to describe an associated relationship between associated objects, and can indicate that three relationships can exist, for example, A and / or B can indicate that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally indicates that the front and rear associated objects are "or" relationship.

[0130] In the description of the embodiments of the application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, be operated or used in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0131] In the description of the application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0132] In the description of the application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood broadly, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0133] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms "parallel" and "perpendicular" allow a certain degree of tolerance and / or error, including approximately parallel and approximately perpendicular.

[0134] In the following, the embodiments of the application will be described in detail.

[0135] With the popularization of the concept of green development, new energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used, and batteries are also increasingly used in the field of energy storage and the like.

[0136] In order to improve the energy of the battery device, the battery device usually includes a plurality of battery monomers arranged in an array, and the arrangement of the battery monomers has an influence on the volume utilization rate of the battery device. In addition, in some application scenarios, the installation space of the battery device is limited in the horizontal direction, and how to improve the effective use of the installation space is one of the research topics.

[0137] In order to improve the effective use of the limited installation space, a technical concept of stacking multiple layers of battery monomers along the direction of gravity is proposed. However, the electrode terminals of some battery monomers are located above the battery monomer shell (above in the direction of gravity), and if such battery monomers are stacked along the direction of gravity, a space for accommodating the electrode terminals and the busbar between the adjacent battery monomers along the direction of gravity is needed. The pressure relief components of some battery monomers are also located above the battery monomer shell, in which case, a space is also needed to form a pressure relief channel. In this case, stacking multiple layers of battery monomers along the direction of gravity still wastes space, and there is room for further optimizing the space utilization.

[0138] Research shows that if the electrode terminals do not protrude from the support surface of the adjacent battery monomers in the stacked state of the battery monomers along the direction of gravity, the space between the multiple layers of battery monomers stacked along the direction of gravity can be reduced, thereby reducing space waste and improving space utilization.

[0139] Based on this technical concept, the present application provides a battery device, which includes at least two battery monomers, each battery monomer including a shell and an electrode terminal, the shell including a first shell wall located at at least one side end of the shell along the direction of gravity, the first shell wall including a body portion and a protruding portion protruding from the body portion along the direction of gravity; the electrode terminal is arranged on the body portion; along the direction of gravity, the plurality of battery monomers are stacked, wherein the protruding portion abuts against the adjacent battery monomer.

[0140] Since the first shell wall comprises the body part and the protruding part, the electrode terminal is arranged on the body part, and along the direction of gravity, the plurality of battery monomers are stacked and the protruding part abuts against the adjacent battery monomer, so that not only the plurality of battery monomers can be arranged along the direction of gravity, but also the plurality of battery monomers stacked along the direction of gravity occupy as little space as possible in the direction of gravity, thereby improving the volume utilization rate of the battery device. Moreover, in the case that the horizontal space for mounting the battery device is limited, the plurality of battery monomers can be arranged in the space in the direction of gravity, thereby improving the space utilization rate and the energy of the battery device. In addition, since the first shell wall has the protruding part, the strength and rigidity of the first shell wall can be improved, thereby improving the support stability of the adjacent battery monomer, which is beneficial to stacking the plurality of battery monomers along the direction of gravity.

[0141] The battery device provided by the embodiments of the present application can be used in, but is not limited to, an electric device such as an energy storage device, a vehicle, a ship or an aircraft.

[0142] The embodiments of the present application also provide an electric device comprising the battery device, and the electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship or a spacecraft. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric aircraft toy, and the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft.

[0143] The embodiments of the present application also provide an energy storage device comprising the battery device, and the energy storage device can include an energy storage container or an energy storage cabinet.

[0144] For the convenience of description, the electric device of an embodiment of the present application is taken as a vehicle 1000 for example. The following will be described with reference to the accompanying drawings.

[0145] Figure 1 The structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile. As shown in the figure, Figure 1 The vehicle 1000 is internally provided with a battery device 100, and the battery device 100 can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further comprise a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0146] In some embodiments of the present application, the battery apparatus 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0147] Figure 3 The structural schematic diagram of the battery apparatus provided for some embodiments of the present application.

[0148] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 10 (see Figure 4 ), which are connected in series, in parallel or in a mixed manner by busbars. The plurality of battery cell electrical connections can form a power supply circuit, and connecting the motor 300 or other electrical appliances of the electric vehicle to the power supply circuit can form an electrical circuit.

[0149] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0150] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0151] In some embodiments, the battery apparatus can be a battery pack including a box 20 and one or more battery cell assemblies accommodated in the box.

[0152] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0153] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0154] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which are not limited in the embodiments of the present application.

[0155] Next, the embodiments of the present application will be described in detail. Figures 3 to 17 The embodiments of the present application will be described in detail.

[0156] Figure 3 A structural schematic diagram of a battery device provided for some embodiments of the present application; Figure 4 A exploded perspective schematic diagram of a battery cell provided for some embodiments of the present application; Figure 5 A perspective schematic diagram of a battery cell provided for some embodiments of the present application; Figure 6 A perspective schematic diagram of an electrically connected battery cell provided for some embodiments of the present application; Figure 7 A perspective schematic diagram of a battery cell provided for further embodiments of the present application; Figure 8 A perspective schematic diagram of a battery cell provided for still further embodiments of the present application; Figure 9 A perspective schematic diagram of a battery cell provided for still further embodiments of the present application; Figure 10 A perspective schematic diagram of a battery cell in an arrangement state provided for some embodiments of the present application; Figure 11 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for some embodiments of the present application; Figure 12 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for further embodiments of the present application; Figure 13 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for further embodiments of the present application; Figure 14 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for some embodiments of the present application; Figure 15 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for still further embodiments of the present application; Figure 16 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for still further embodiments of the present application; Figure 17 A perspective schematic diagram of a battery cell in a stacked and arranged state provided for still further embodiments of the present application.

[0157] In the description of embodiments of the present application, for the convenience of illustration, the direction in which the arrow X is located represents the "first direction", the direction in which the arrow Y is located represents the "second direction", and the direction in which the arrow Z is located represents the "gravity direction". It should be noted that the gravity direction herein is for the case where the battery device is generally horizontally placed.

[0158] A first aspect of the present application provides a battery device 100, as shown in Figure 3 The battery device 100 includes at least two battery cells 10, as shown in Figures 4 to 9 Each battery cell 10 includes: a housing 1 including a first shell wall 11, the first shell wall 11 being located at at least one side end of the housing 1 along the gravity direction Z, the first shell wall 11 including a body portion 111 and a protruding portion 112 protruding from the body portion 111 along the gravity direction Z; an electrode terminal 2 provided on the body portion 111; as shown in Figure 3 , Figures 10 to 17As shown, the plurality of battery cells 10 are stacked along the gravity direction Z, with the protrusions 112 abutting against adjacent battery cells 10.

[0159] In some embodiments, as shown, Figures 4 to 9 As shown, the battery cell includes a housing 1. The housing 1 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite housing 1), or an aluminum-plastic film, etc. The battery cell generally also includes an electrode assembly 6. In some embodiments, the housing 1 can be a sealed structure, or a non-sealed structure. As an example, when the housing 1 is a non-sealed structure, the housing 1 serves to protect the electrode assembly 6, and a sealing bag can be further included between the housing 1 and the electrode assembly 6, for encapsulating the electrode assembly 6 and electrolyte, etc. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing 1 is a sealed structure, it is used to encapsulate the electrode assembly 6 and electrolyte, etc.

[0160] In some embodiments, as shown, Figure 4 As shown, the battery cell 10 includes an electrode assembly 6. The electrode assembly 6 includes a positive electrode sheet, a negative electrode sheet, and a separator. During charging and discharging of the battery cell, active ions (such as lithium ions) are inserted into and extracted from the positive electrode and the negative electrode. The separator is disposed between the positive electrode sheet and the negative electrode sheet, and can serve to prevent short circuiting between the positive and negative electrodes, while allowing the active ions to pass through. Figure 4 In the embodiment shown, as the electrode assembly 6, two laminated jelly rolls formed by laminating and winding a positive electrode sheet, a negative electrode sheet, and a separator are shown, but the electrode assembly 6 is not limited to Figure 4 The winding structure shown, for example, can also be a laminated structure or other structure forms.

[0161] As an example, the battery cell 10 can be a prismatic battery cell or other shaped battery cell, including a square battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, such as a hexagonal prismatic battery cell, etc. In Figures 4 to 17 In the embodiment shown, a battery cell with a housing in the shape of a cuboid is taken as an example for illustration.

[0162] In some embodiments, as shown, Figure 4 As shown, the housing 1 includes a plurality of housing walls, with a portion of the housing walls enclosing a space with an opening, which can be closed by another housing wall (such as the first housing wall 11) to form a containing space for containing the electrode assembly 6 and electrolyte, etc. The housing 1 can be provided with one or more openings. The housing wall (such as the first housing wall 11) that closes the opening can also be configured as a top cover.

[0163] In some embodiments, as shown, Figure 4As shown, the outer shell 1 has a shell wall at at least one end along the gravity direction Z. For ease of description, the shell wall is named "first shell wall 11". The first shell wall 11 can be the top wall and / or bottom wall of the shell wall in the outer shell 1.

[0164] In this embodiment, the first housing wall 11 mainly refers to the portion that encloses the receiving space. In some specific embodiments, the top cover may also include a mounting flange (not shown in the figure) connected to the first housing wall 11, which can extend into the receiving space. The top cover can be connected to other housing walls by means of bonding and / or welding.

[0165] In some embodiments, such as Figures 4 to 9 As shown, the first housing wall 11 includes a body portion 111 and a protrusion 112 that protrudes from the body portion 111 in the direction of gravity Z away from the electrode assembly 6 (the upper side in the figure). This application does not specifically limit the shape of the body portion 111 and the protrusion 112. For example, the protrusion 112 can be a cuboid or a cylinder, etc.

[0166] In some embodiments, for ease of understanding, such as Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, the part within the dashed box O1 is the main body 111, and the part within the dashed box O2 is the protrusion 112. It should be noted that the dashed boxes are used to distinguish them for ease of understanding and explanation. For the first housing wall 11, the main body 111 and the protrusion 112 can be integrally connected.

[0167] The protrusion 112 can be as follows Figures 4 to 8 As shown, it is formed by bending the first housing wall 11 to create a concave-convex shape, or it can be formed as follows: Figure 9 This is achieved by locally thickening the first housing wall 11.

[0168] In some embodiments, such as Figures 4 to 8 As shown, the first housing wall 11 has a protrusion 112, which is formed by forming the first housing wall 11 into a concave-convex shape. Other housing walls connected to the first housing wall 11 have extensions extending in the direction of gravity, and the extensions are connected to the protrusion 112. Thus, the first housing wall 11 and other housing walls can form an accommodating space.

[0169] Exemplarily, in the first housing wall 11, along the gravity direction Z, a portion of the first housing wall 11 protrudes in a direction away from the electrode assembly 6 to form the protruding portion 112 relative to the body portion 111; alternatively, in the first housing wall 11, along the gravity direction Z, a portion of the first housing wall 11 is recessed in a direction close to the electrode assembly 6 to form the body portion 111, and the protruding portion 112 protrudes relative to the body portion 111 along the gravity direction Z. The surface of the protruding portion 112 on the side away from the electrode assembly 6 along the gravity direction Z serves as a support surface in a state of supporting the adjacent battery cell 10. In the first housing wall 11, the transition portion between the body portion 111 and the support surface (the transition portion can be regarded as a portion of the protruding portion 112) can extend along the gravity direction Z, or can extend at a certain inclination angle relative to the gravity direction Z. Of course, the first housing wall 11 can have other structures in addition to the body portion 111 and the protruding portion 112.

[0170] Optionally, as shown in Figures 5 to 9 , the protruding portion 112 can be one, two, or of course three or more. Along a direction perpendicular to the gravity direction Z, the protruding portion 112 can be located at a position close to an end portion of the first housing wall 11, or can be located at a region substantially in the middle of the first housing wall 11.

[0171] Exemplarily, when the protruding portion 112 is one, as shown in Figure 7 , along the first direction X, the protruding portion 112 is located on one side of the body portion 111, and the protruding portion 112 can extend along the first direction to an end portion of the first housing wall 11 along the first direction (for example, the right end portion as shown in Figure 7 ), and the body portion 111 can extend along the first direction to another end portion of the first housing wall 11 along the first direction (for example, the left end portion as shown in Figure 7 ); alternatively, as shown in Figure 8 , along the first direction X, the body portion 111 is located on both sides of the protruding portion 112.

[0172] Exemplarily, when the protruding portion 112 is two, as shown in Figures 4 to 6 , Figure 9 , along the first direction X, the body portion 111 can be located at a position substantially in the middle of the first housing wall 11, and the protruding portions 112 are respectively located on both sides of the body portion 111, wherein the two protruding portions 112 can respectively extend along the first direction X to both end portions of the first housing wall 11 (for example, the left end portion and the right end portion as shown in Figure 5 ), or the two protruding portions 112 can not extend to both end portions of the first housing wall 11 along the first direction X, but there is a body portion 111 between the protruding portions 112 and the end portions (as shown in Figure 9 ).

[0173] The above embodiment is merely an example of the number and positional relationship of the protruding portion 112 and the body portion 111. The protruding portion 112 and the body portion 111 can have more numbers, and the protruding portion 112 and the body portion 111 can have other positional relationships, such as the protruding portion 112 and the body portion 111 being arranged along the second direction Y. Details are not described herein.

[0174] In some embodiments, the electrode assembly 6 includes a tab 5, and the electrode terminal 2 is electrically connected with the tab 5 to lead current in or out of the electrode assembly 6.

[0175] In some embodiments, the electrode terminal 2 is at least partially exposed from the body portion 111, and the electrode terminal 2 does not protrude beyond the protruding portion 112 along the gravity direction Z. “Exposed” includes being exposed from the body portion 111 but not protruding beyond the body portion 111 along the gravity direction Z, and also includes protruding beyond the body portion 111 along the gravity direction Z.

[0176] In some embodiments, as shown in FIG. 1, the protruding portion 112 is arranged along the gravity direction Z. Figures 11 to 16 In some embodiments, as shown in FIG. 1, the protruding portion 112 is arranged along the gravity direction Z.

[0177] Since the first shell wall 11 includes the body portion 111 and the protruding portion 112, the electrode terminal 2 is arranged on the body portion 111, and the plurality of battery monomers 10 are stacked along the gravity direction Z with the protruding portion 112 abutting against the adjacent battery monomer 10, the plurality of battery monomers 10 can be arranged in multiple layers along the gravity direction Z, and the plurality of battery monomers 10 stacked along the gravity direction Z can occupy as little space as possible along the gravity direction Z, thereby improving the volume utilization of the battery device. In addition, in the case where the horizontal space for installing the battery device is limited, the plurality of battery monomers 10 can be arranged to fully utilize the space along the gravity direction Z, thereby improving the space utilization and the energy of the battery device. In addition, since the first shell wall 11 has the protruding portion 112, the strength and rigidity of the first shell wall 11 can be improved, thereby improving the support stability of the adjacent battery monomer 10, which is conducive to stacking the plurality of battery monomers 10 along the gravity direction.

[0178] In some embodiments, as shown in FIG. 1, the protruding portion 112 is arranged along the gravity direction Z. Figure 7 Figure 8 ​As shown in FIG. 1, the first shell wall 11 includes a body portion 111 and a protruding portion 112 connected along the first direction X, the first shell wall 11 includes one protruding portion 112, and the electrode terminal 2 is located on one side or both sides of the protruding portion 112 along the first direction X, the first direction X being perpendicular to the direction of gravity Z.

[0179] In some embodiments, as shown in FIG. 1, the electrode assembly 6 includes a first tab and a second tab having opposite polarities, and the first tab and the second tab can conduct current out of the electrode assembly 6. One of the first tab and the second tab can be a positive tab, and the other can be a negative tab. Figure 4 In some embodiments, as shown in FIG. 1, the electrode terminal 2 includes a first electrode terminal and a second electrode terminal, the first electrode terminal is electrically connected to the first tab, and the second electrode terminal is electrically connected to the second tab to conduct current into or out of the electrode assembly 6.

[0180] Figure 4 In some embodiments, as shown in FIG. 1, the electrode terminal 2 includes a first electrode terminal and a second electrode terminal, the first electrode terminal is electrically connected to the first tab, and the second electrode terminal is electrically connected to the second tab to conduct current into or out of the electrode assembly 6.

[0181] In a specific embodiment, as shown in FIG. 1, along the first direction X, the protruding portion 112 is located at a substantially middle position of the first shell wall 11, and the first electrode terminal and the second electrode terminal are located on one side (e.g., the left side or the right side as shown in FIG. 1) of the protruding portion 112, or the first electrode terminal and the second electrode terminal are respectively located on both sides (e.g., the left side and the right side as shown in FIG. 1) of the protruding portion 112. Figure 8 Figure 8 In a specific embodiment, as shown in FIG. 1, along the first direction X, the protruding portion 112 is located at a substantially middle position of the first shell wall 11, and the first electrode terminal and the second electrode terminal are located on one side (e.g., the left side or the right side as shown in FIG. 1) of the protruding portion 112, or the first electrode terminal and the second electrode terminal are respectively located on both sides (e.g., the left side and the right side as shown in FIG. 1) of the protruding portion 112. Figure 8 In a specific embodiment, as shown in FIG. 1, along the first direction X, the protruding portion 112 is located at a substantially middle position of the first shell wall 11, and the first electrode terminal and the second electrode terminal are located on one side (e.g., the left side or the right side as shown in FIG. 1) of the protruding portion 112, or the first electrode terminal and the second electrode terminal are respectively located on both sides (e.g., the left side and the right side as shown in FIG. 1) of the protruding portion 112.

[0182] Figure 7 In a specific embodiment, as shown in FIG. 1, along the first direction X, the protruding portion 112 is located at a substantially middle position of the first shell wall 11, and the first electrode terminal and the second electrode terminal are located on one side (e.g., the left side or the right side as shown in FIG. 1) of the protruding portion 112, or the first electrode terminal and the second electrode terminal are respectively located on both sides (e.g., the left side and the right side as shown in FIG. 1) of the protruding portion 112. Figure 7 Figure 7 In a specific embodiment, as shown in FIG. 1, along the first direction X, the protruding portion 112 is located at a substantially middle position of the first shell wall 11, and the first electrode terminal and the second electrode terminal are located on one side (e.g., the left side or the right side as shown in FIG. 1) of the protruding portion 112, or the first electrode terminal and the second electrode terminal are respectively located on both sides (e.g., the left side and the right side as shown in FIG. 1) of the protruding portion 112.

[0183] In this way, the entire protruding portion 112 can be used to support the battery cells of the adjacent layer, which is conducive to improving the support stability, and the position of the electrode terminal can be flexibly designed.

[0184] In some embodiments, as shown in FIG. 1, the first shell wall 11 includes a body portion 111 and a protruding portion 112 connected along the first direction X, the first shell wall 11 includes at least two protruding portions 112, and the electrode terminal is located between the two protruding portions 112 adjacent along the first direction X, the first direction X being perpendicular to the direction of gravity Z. Figure 5 Figure 9 In a specific embodiment, as shown in FIG. 1, the first shell wall 11 includes a body portion 111 and a protruding portion 112 connected along the first direction X, the first shell wall 11 includes at least two protruding portions 112, and the electrode terminal is located between the two protruding portions 112 adjacent along the first direction X, the first direction X being perpendicular to the direction of gravity Z.

[0185] In a specific embodiment, as shown in FIG. 1, the first shell wall 11 includes a body portion 111 and a protruding portion 112 connected along the first direction X, the first shell wall 11 includes at least two protruding portions 112, and the electrode terminal is located between the two protruding portions 112 adjacent along the first direction X, the first direction X being perpendicular to the direction of gravity Z. Figure 5 Figure 9 ​​​​​​As shown, along the first direction X, the two protrusions 112 are arranged along the first direction X, and the electrode terminal is located between the two protrusions 112. Among them, along the first direction X, the two protrusions 112 can respectively extend to the two ends of the first shell wall 11 along the first direction (for example Figure 5 As shown, the left end and the right end), or along the first direction X, the two protrusions can not extend to the two ends of the first shell wall 11 along the first direction (for example Figure 9 As shown, the left end and the right end).

[0186] In other specific embodiments, there can be three, four or more protrusions 112, for example, there can be three protrusions, and there is a body part between each adjacent protrusion, and the electrode terminal is located in the body part. In the stacked state along the direction of gravity Z, the three protrusions all abut the adjacent battery monomer.

[0187] The position of the two or more protrusions is not particularly limited, but it is beneficial to improve the support stability to be arranged generally symmetrically.

[0188] Therefore, by abutting the at least two protrusions 112 with the adjacent battery monomer and locating the electrode terminal between the adjacent protrusions 112, the support stability in the direction of gravity Z can be improved. Moreover, the position of the electrode terminal can be flexibly designed.

[0189] In some embodiments, as Figures 5 to 9 As shown, in the first shell wall 11, the body part 111 is connected with the protrusion 112 along the first direction X, and the shell 1 further comprises two second shell walls 12 arranged opposite along the first direction X, and the battery monomer 10 further comprises a pressure relief component 3, the pressure relief component 3 is arranged on at least one second shell wall 12, and the first direction X is perpendicular to the direction of gravity Z.

[0190] In some embodiments, the battery monomer further comprises a pressure relief component 3, the pressure relief component 3 is used to open to discharge the internal gas of the battery monomer when the battery monomer has thermal runaway.

[0191] As an example, the internal pressure or temperature of the battery monomer reaches a predetermined threshold value to actuate to release the internal pressure or temperature. When the internal pressure or temperature of the battery monomer reaches the predetermined threshold value, the pressure relief component 3 performs an action or a weak structure provided in the pressure relief component 3 is broken, thereby forming an opening or a channel for the internal pressure or temperature to be released. The threshold value is different according to different design requirements. The threshold value can depend on the material of one or more of the positive plate, the negative plate, the electrolyte and the separator in the battery monomer.

[0192] As an example, the pressure relief component 3 can be integrally formed with the shell 1.

[0193] As an example, the pressure relief component 3 can also be provided separately from the housing 1 and connected thereto.

[0194] As used herein, "actuation" of the pressure relief component 3 means that the pressure relief component 3 is caused to move or is activated to a state in which the internal pressure and temperature of the battery cell can be released. The movement of the pressure relief component 3 can include, but is not limited to, movement of a component in the pressure relief component 3 to form an exhaust passage, at least a portion of the pressure relief component 3 rupturing, breaking, tearing or opening, etc. When the pressure relief component 3 is actuated, the high-temperature and high-pressure substances inside the battery cell are discharged as exhaust from the actuated part. In this way, the battery cell can be depressurized and cooled at a controllable pressure or temperature, thereby avoiding potentially more serious accidents.

[0195] In some embodiments, when the housing 1 is not a sealed structure, the pressure relief component 3 can be provided as a through hole for discharging the gas inside the battery cell.

[0196] As used herein, the exhaust from the battery cell includes, but is not limited to, electrolyte, dissolved or broken positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by reactions, flames, etc.

[0197] In some embodiments, as shown in FIG. 1, the first housing wall 11 is one or both of the two housing walls of the housing 1 along the direction of gravity; and the second housing wall 12 is a side wall connected to the first housing wall 11. Optionally, the pressure relief component 3 can be provided on both second housing walls 12, or on one of the second housing walls 12. The number of pressure relief components 3 can be one, two or other suitable numbers. The structure of the pressure relief component 3 itself can be a known structure. Figures 5 to 9 Since the pressure relief component 3 is located on the second housing wall 12 rather than the first housing wall 11 where the electrode terminals are located, it is not necessary to leave a passage for discharging the pressure relief gas in the direction of gravity Z, which is advantageous for reducing the space occupied by the multiple battery cells stacked in the direction of gravity Z, improving the volume utilization rate; and it can also reduce the probability of the ejected material falling on the electrode terminals when the pressure relief component 3 is actuated, achieving electrical and gas separation and reducing the risk of short circuit or even fire caused by thermal runaway of the battery cell.

[0198] In some embodiments, as shown in FIG. 1, the housing 1 further includes two third housing walls 13, and the area of the first housing wall 11 and the second housing wall 12 is smaller than the area of the third housing wall 13.

[0199] Figures 5 to 9 In some embodiments, the third housing wall 13 is a large face of the side wall of the housing wall. The pressure relief component is formed on the second housing wall 12, meaning that the pressure relief component is not provided on the large face.

[0200] In some embodiments, the third housing wall 13 is a large face of the side wall of the housing wall. The pressure relief component is formed on the second housing wall 12, meaning that the pressure relief component is not provided on the large face.​

[0201] Here, the area of the first housing wall 11 can be calculated by projection in a projection plane perpendicular to the direction of gravity, the area of the second housing wall 12 can be calculated by projection in a projection plane perpendicular to the first direction X, and the area of the third housing wall 13 can be calculated by projection in a projection plane perpendicular to the second direction Y. Thus, since the pressure relief member 3 is not formed in the third housing wall 13 having a larger area, the space occupied by the passage for discharging the pressure relief gas can be reduced, and the space utilization in the battery device can be further improved.

[0202] In some embodiments, as shown in FIG. 1, the plurality of battery cells 10 form a plurality of battery cell groups 30, each battery cell group 30 includes a plurality of battery cells 10 stacked along the direction of gravity Z, the plurality of battery cell groups 30 includes a first battery cell group 301 and a second battery cell group 302, the first battery cell group 301 and the second battery cell group 302 are arranged along the first direction X at intervals along the first direction X, and at least some of the battery cells 10 in the first battery cell group 301 and / or at least some of the battery cells 10 in the second battery cell group 302 are arranged such that the pressure relief member 3 of each faces the interval 4. Figures 11 to 17

[0203] Here, the interval 4 is used at least to form a pressure relief space to accommodate the discharge from the pressure relief member 3; when there are more intervals 4 communicating with each other, a larger pressure relief space or passage can be formed. Optionally, the pressure relief space or passage can be communicated with an external space.

[0204] In some embodiments, the plurality of battery cells 10 are stacked along the direction of gravity Z to form a battery cell group 30, and two, three, four or more battery cells 10 can be stacked along the direction of gravity Z to form a battery cell group 30. The number of battery cells 10 in each battery cell group 30 can be determined according to the height of the accommodating space of the case of the battery device and the height of the battery cell 10 itself. The number of battery cells in each battery cell group can be the same or different.

[0205] In some embodiments, the plurality of battery cell groups 30 includes a first battery cell group 301 and a second battery cell group 302, and the first battery cell group 301 and the second battery cell group 302 are arranged at intervals along the first direction X. The pressure relief member 3 of some of the battery cells in the first battery cell group 301 can face the interval 4 (see FIG. 2), and the pressure relief member 3 of all the battery cells in the first battery cell group 301 can face the interval 4 (see FIG. 3). Figure 13 Figure 11 , Figure 12 and Figure 16 ​​) ; the pressure relief components 3 of some of the battery cells 10 in the second battery cell group 302 can be directed towards the space 4 (see Figure 13 ), and the pressure relief components 3 of all of the battery cells 10 in the first battery cell group 301 can be directed towards the space 4 (see Figure 11 、 Figure 12 、 Figure 15 and Figure 16 ).

[0206] It should be noted that for those pressure relief components 3 that are not directed towards the space 4, other spaces can be further provided to form pressure relief spaces for those pressure relief components 3.

[0207] Since the plurality of battery cells 10 form the plurality of battery cell groups 30, each battery cell group 30 includes a plurality of battery cells 10 stacked along the gravity direction Z, the battery device 100 can include more battery cells and be able to provide higher energy; since at least some of the battery cells in the first battery cell group 301 and / or at least some of the battery cells in the second battery cell group 302 are arranged with their respective pressure relief components 3 directed towards the space 4, the first battery cell group 301 and the second battery cell group 302 can share the space 4, which is conducive to improving the space utilization within the battery device; and since the pressure relief components 3 of some of the battery cells can be directed towards the space 4, it is also conducive to flexibly designing the arrangement direction of the battery cells.

[0208] In some embodiments, as shown in Figure 11 、 Figure 12 and Figure 16 , the first battery cell group 301 and the second battery cell group 302 are arranged such that the pressure relief components 3 of each battery cell 10 in the first battery cell group 301 and the pressure relief components 3 of each battery cell 10 in the second battery cell group 302 are both directed towards the space 4.

[0209] The space 4 can be determined according to factors such as the size of the battery device, the size of the battery cell 10, the discharge amount of the pressure relief component 3, and the like, and the width of the space 4 in the first direction X can also be considered from the perspective of inhibiting heat diffusion. Of course, a partition 9 can also be added to the space 4 for the purpose of inhibiting heat diffusion. Here, heat diffusion refers to the phenomenon that the thermal runaway of one battery cell triggers the thermal runaway of the remaining battery cells in succession.

[0210] In the same projection plane perpendicular to the first direction X, the projections of the pressure relief components 3 of each battery cell 10 in the first battery cell group 301 and the projections of the pressure relief components 3 of each battery cell 10 in the second battery cell group 302 may partially overlap, completely overlap, or not overlap at all. Optionally, along the first direction X, a separator 9 may be provided between the first battery cell group 301 and the second battery cell group 302. In the same projection plane perpendicular to the first direction X, the projections of the pressure relief components 3 of each battery cell 10 in the first battery cell group 301 are located within the projection range of the separator 9, and the projections of the pressure relief components 3 of each battery cell 10 in the second battery cell group 302 are also located within the projection range of the separator 9. Therefore, the first battery cell group 301 and the second battery cell group 302 share the space 4, which is beneficial to improving the space utilization rate within the battery device.

[0211] In some embodiments, such as Figure 12 As shown, the pressure relief components 3 of each battery cell in the first battery cell group 301 and the pressure relief components 3 of each battery cell in the second battery cell group 302 are offset along the direction of gravity Z. That is, along the direction of gravity Z, the pressure relief components 3 of each battery cell in the first battery cell group 301 and the pressure relief components 3 of each battery cell in the second battery cell group 302 are not at the same height.

[0212] In some embodiments, such as Figure 12 As shown, in the same projection plane perpendicular to the first direction X, the projections of the pressure relief components 3 of each battery cell 10 in the first battery cell group 301 and the projections of the pressure relief components 3 of each battery cell 10 in the second battery cell group 302 do not overlap at least partially.

[0213] Therefore, since the pressure relief components 3 of the battery cells are staggered along the direction of gravity Z, the probability of the ejected material from the pressure relief components 3 contaminating or damaging the pressure relief components 3 of the opposite battery cells when the pressure relief components 3 are depressurized can be reduced, and the risk of thermal diffusion along the first direction X when the battery cells are thermally runaway can be reduced.

[0214] In some embodiments, such as Figure 12 As shown, in the same projection plane perpendicular to the first direction X, the projection of the pressure relief component 3 of each battery cell 10 in the first battery cell group 301 does not overlap with the projection of the pressure relief component 3 of each battery cell 10 in the second battery cell group 302.

[0215] That is, the pressure relief components 3 of each battery cell in the first battery cell group 301 are completely staggered from the pressure relief components 3 of each battery cell in the second battery cell group 302.

[0216] In some embodiments, the pressure relief components 3 of the battery cells in the first battery cell group 301 and the pressure relief components 3 of the battery cells in the second battery cell group 302 can be completely staggered in the second direction Y; or, the pressure relief components 3 of the battery cells in the first battery cell group 301 and the pressure relief components 3 of the battery cells in the second battery cell group 302 can be completely staggered in the gravity direction Z; or, the pressure relief components 3 of the battery cells in the first battery cell group 301 and the pressure relief components 3 of the battery cells in the second battery cell group 302 can be completely staggered in the second direction Y and in the gravity direction Z.

[0217] In some embodiments, as shown in FIG. 3, the projections of the pressure relief components 3 of the battery cells 10 in the first battery cell group 301 and the projections of the pressure relief components 3 of the battery cells 10 in the second battery cell group 302 are arranged and completely staggered (the two projections are separated from each other) in the gravity direction Z in the same projection plane perpendicular to the first direction X. Figure 12

[0218] Thus, since the pressure relief components 3 of the battery cells are completely staggered in the gravity direction Z, the probability that the eruption of the pressure relief components 3 pollutes or damages the pressure relief components 3 of the battery cells on the opposite side when the pressure relief components 3 are relieved can be further reduced, and the risk of thermal diffusion in the first direction X when the battery cells are in thermal runaway can be further reduced.

[0219] In some embodiments, as shown in FIG. 3, the projections of the pressure relief components 3 of the battery cells 10 in the first battery cell group 301 and the projections of the pressure relief components 3 of the battery cells 10 in the second battery cell group 302 are arranged and completely staggered (the two projections are separated from each other) in the gravity direction Z in the same projection plane perpendicular to the first direction X. Figure 13

[0220] The direction in which the opening of the pressure relief component 3 faces is referred to as the orientation of the pressure relief component.

[0221] Optionally, in the same battery cell group 30, the orientations of the pressure relief components 3 of one, two, three or more battery cells and the pressure relief components 3 of the other battery cells can be different.

[0222] In a specific embodiment, as shown in FIG. 3, in the same battery cell group 30, the pressure relief components 3 of a portion of the battery cells can face one side in the first direction X, and the pressure relief components 3 of another portion of the battery cells can face the other side in the first direction X. Figure 13 Thus, not only can the arrangement orientation of the battery cells be flexibly designed, but also the probability that the eruption of the pressure relief components 3 pollutes or damages the pressure relief components 3 of the battery cells adjacent in the gravity direction Z when the pressure relief components 3 are relieved can be reduced, and the risk of thermal diffusion in the gravity direction Z when the battery cells are in thermal runaway can be reduced.

[0223] In some embodiments, as shown in FIG. 3, the projections of the pressure relief components 3 of the battery cells 10 in the first battery cell group 301 and the projections of the pressure relief components 3 of the battery cells 10 in the second battery cell group 302 are arranged and completely staggered (the two projections are separated from each other) in the gravity direction Z in the same projection plane perpendicular to the first direction X.

[0224] Figure 13 ​​​As shown, in the same battery cell group 30, the pressure relief components 3 of the battery cells adjacent in the gravity direction Z are opposite in the orientation in the first direction X, and in the same layer, the pressure relief components 3 of the battery cells in the first battery cell group 301 and the second battery cell group 302 are the same in the orientation in the first direction X.

[0225] In the case where the battery device has a plurality of battery cell groups each including a plurality of battery cells stacked in the gravity direction Z, the battery cells at the same height can be referred to as a layer of battery cells, that is, the array of battery cells arranged by the plurality of battery cell groups can include a plurality of layers of battery cells. For example, Figure 13 For example, the battery cells in the same layer can be the battery cells 10 in the first battery cell group 301 and the battery cells 10 in the second battery cell group 302 in the first layer from the top, or the battery cells 10 in the first battery cell group 301 and the battery cells 10 in the second battery cell group 302 in the second layer or another layer from the top.

[0226] In one specific embodiment, in the first battery cell group 301, the pressure relief components 3 of the battery cells adjacent in the gravity direction Z are opposite in the orientation in the first direction X, for example, in adjacent battery cells, the pressure relief component 3 of one of the battery cells is oriented in the first direction X toward the second battery cell group 302, and the pressure relief component 3 of the other battery cell is oriented in the first direction X toward the side away from the second battery cell group 302.

[0227] In the same layer, in the gravity direction Z, the pressure relief components 3 of the battery cells in the first battery cell group 301 and the second battery cell group 302 are the same in the orientation in the first direction X (for example Figure 13 As shown, all are oriented to the left or right side). For example, the pressure relief components 3 of the battery cells in the first battery cell group 301 and the second battery cell group 302 in the first layer from the top are all oriented to the left side of the figure, and the pressure relief components 3 of the battery cells in the first battery cell group 301 and the second battery cell group 302 in the second layer from the top are all oriented to the right side of the figure.

[0228] Therefore, since the pressure relief components 3 of adjacent battery cells along the gravity direction Z in the same battery cell group 30 are oriented oppositely along the first direction X, the probability of the ejected material from the pressure relief component 3 contaminating or damaging the pressure relief components 3 of adjacent battery cells along the gravity direction Z can be reduced. Since the pressure relief components 3 of each battery cell in the same layer are oriented in the first direction X, the ejected material from the pressure relief component 3 will hardly contaminate or damage the pressure relief components 3 of the opposite battery cell. Thus, the risk of thermal runaway along the gravity direction Z and the risk of thermal runaway along the first direction X can be reduced simultaneously.

[0229] In some embodiments, the battery cells 10 in the first battery cell group 301 and the battery cells 10 in the second battery cell group 302 are arranged such that their respective pressure relief components 3 face the same direction (e.g., Figure 15 The pressure relief component 3 of each battery cell 10 in each battery cell group 30 shown faces the left or right side of the battery cell group 30 in which it is located.

[0230] It should be noted that, for Figure 15 The first battery cell group 301 and the second battery cell group 302 shown can each be provided with a pressure relief space (pressure relief channel) for accommodating the discharge of the pressure relief component 3.

[0231] Therefore, since the pressure relief components 3 of each battery cell face the same direction, the ejected material when the pressure relief component 3 is depressurized will hardly contaminate or damage the pressure relief component 3 of the battery cell on the opposite side along the first direction X, which can reduce the risk of thermal diffusion along the first direction X when the battery cell is thermally runaway; moreover, it facilitates the manufacturing and assembly of battery cells and helps to improve the assembly efficiency of the battery device.

[0232] In some embodiments, such as Figure 14 As shown, the multiple battery cell packs 30 also include a third battery cell pack 303, combined with Figure 11 and Figure 12 The pressure relief component 3 of each battery cell in the third battery cell group 303 is oriented in the same direction X as the pressure relief component 3 of each battery cell in the first battery cell group 301 along the same direction X. Furthermore, along the first direction X, the second battery cell group 302 is located between the first battery cell group 301 and the third battery cell group 303.

[0233] In one specific embodiment, with Figure 11 and Figure 14To illustrate with an example, the first battery cell group 301, the second battery cell group 302, and the third battery cell group 303 are arranged along the first direction X. The pressure relief components 3 of each battery cell in the third battery cell group 303 face the same direction along the first direction X as the pressure relief components 3 of each battery cell in the first battery cell group 301. For example, the pressure relief components 3 of each battery cell face the right side of its battery cell group, while the pressure relief components 3 of each battery cell in the second battery cell group 302 face the left side of its battery cell group. The second housing wall of the third battery cell group 303 and the second housing wall of the third battery cell group 303 can be close to or in contact with each other.

[0234] This allows for the flexible arrangement of more battery cells, resulting in high grouping efficiency. Furthermore, the third battery cell group 303 is located on the side of the second battery cell group 302 facing away from the first battery cell group 301 along the first direction X, and the pressure relief component 3 is located on the side of the third battery cell group 303 facing away from the second battery cell group 302. Therefore, the second battery cell group 302 and the third battery cell group 303 can be arranged close to or even in contact with each other along the first direction X, thereby further improving space utilization and the energy of the battery device.

[0235] In some embodiments, such as Figure 17 As shown, multiple battery cells 10 form multiple battery cell groups 30. Each battery cell group 30 includes multiple battery cells stacked along the gravitational direction Z. The multiple battery cell groups 30 include a second battery cell group 302 and a third battery cell group 303. The second battery cell group 302 and the third battery cell group 303 are arranged along a first direction X. The pressure relief components 3 of each battery cell in the third battery cell group 303 are oriented along the first direction X in a direction away from the second battery cell group 302, and the pressure relief components 3 of each battery cell in the second battery cell group 302 are oriented along the first direction X in a direction away from the third battery cell group 303. The second housing wall of the third battery cell group 303 facing the second battery cell group 302 and the second housing wall of the second battery cell group 302 facing the third battery cell group 303 can be close to or in contact with each other. This allows the pressure relief components 3 of the two battery cell groups to be further apart, significantly reducing the risk of thermal runaway of the battery cell along the first direction X. In addition, the channels for discharging the gas ejected by the pressure relief components 3 can be arranged on both sides of the two battery cell groups, which is beneficial for the utilization of the space on both sides.

[0236] The arrangement of the first battery cell group 301 and the second battery cell group 302, and the arrangement of the second battery cell group 302 and the third battery cell group 303 described above can be combined. For example, Figure 14The arrangement in the first battery cell group 301 and the second battery cell group 302, the arrangement in the second battery cell group 302 and the third battery cell group 303, and the arrangement in the first battery cell group 301 and the second battery cell group 302 (the arrangement in the third battery cell group 303 and the fourth battery cell group 304 is the same as the arrangement in the first battery cell group 301 and the second battery cell group 302) can be considered as a combination.

[0237] In some embodiments, as shown in FIG. 1A, the housing 1 further comprises a fourth housing wall 14, the first housing wall 11 is located on one side of the housing 1 along the gravity direction Z, the fourth housing wall 14 is located on the other side of the housing 1 along the gravity direction Z, and the plurality of battery cells 10 form a plurality of battery cell groups 30, each battery cell group 30 comprises a plurality of battery cells 10 stacked along the gravity direction Z, and in the same battery cell group 30, the protrusion 112 of one of the two adjacent battery cells 10 located below along the gravity direction Z abuts against the fourth housing wall 14 of the other battery cell located above; or in the same battery cell group 30, the protrusion 112 of one of the two adjacent battery cells 10 located above along the gravity direction Z abuts against the fourth housing wall 14 of the other battery cell located below. Figure 16 In some embodiments, along the gravity direction Z, the first housing wall 11 and the fourth housing wall 14 are respectively located on both sides of the housing 1. If the case where the first housing wall 11 is located above the gravity direction Z is referred to as "normal", then the case where the fourth housing wall 14 is located above the gravity direction Z is referred to as "inverted". Each battery cell 10 can be stacked in a normal manner, or stacked in an inverted manner, or stacked in a mixed manner of normal and inverted.

[0238] In some embodiments, as shown in FIG. 1A, the first housing wall 11 can be located on the upper side of the housing 1, and the fourth housing wall 14 can be located on the lower side of the housing 1, as shown in a fifth battery cell group 305, in the same battery cell group, the protrusion 112 of the battery cell located below abuts against the fourth housing wall 14 of the battery cell located above along the gravity direction Z. That is, in the fifth battery cell group 305, each battery cell 10 is stacked in a normal manner.

[0239] Figure 16 In some embodiments, as shown in FIG. 1A, the first housing wall 11 can be located on the upper side of the housing 1, and the fourth housing wall 14 can be located on the lower side of the housing 1, as shown in a fifth battery cell group 305, in the same battery cell group, the protrusion 112 of the battery cell located below abuts against the fourth housing wall 14 of the battery cell located above along the gravity direction Z. That is, in the fifth battery cell group 305, each battery cell 10 is stacked in a normal manner. Figure 16 In some embodiments, as shown in FIG. 1A, the first housing wall 11 can be located on the upper side of the housing 1, and the fourth housing wall 14 can be located on the lower side of the housing 1, as shown in a fifth battery cell group 305, in the same battery cell group, the protrusion 112 of the battery cell located below abuts against the fourth housing wall 14 of the battery cell located above along the gravity direction Z. That is, in the fifth battery cell group 305, each battery cell 10 is stacked in a normal manner.

[0240] Figure 16 In some embodiments, as shown in FIG. 1A, the first housing wall 11 can be located on the upper side of the housing 1, and the fourth housing wall 14 can be located on the lower side of the housing 1, as shown in a fifth battery cell group 305, in the same battery cell group, the protrusion 112 of the battery cell located below abuts against the fourth housing wall 14 of the battery cell located above along the gravity direction Z. That is, in the fifth battery cell group 305, each battery cell 10 is stacked in a normal manner. Figure 16 ​​The sixth battery cell group 306 shown is one in which, in the same battery cell group, the protrusion 112 of the battery cell located above and the fourth housing wall 14 of the battery cell located below abut in the gravity direction Z. That is, in the sixth battery cell group 306, the battery cells 10 are stacked upside down.

[0241] Each battery cell group in the battery device can be either the fifth battery cell group 305 or the sixth battery cell group 306, and of course, the battery device can include both the fifth battery cell group 305 and the sixth battery cell group 306. In addition, the upright and upside-down placement of the battery cells can be combined with some or all of the first battery cell group 301, the second battery cell group 302, the third battery cell group 303, and the fourth battery cell group 304 described above. For example, the staggered arrangement of the pressure relief members 3 in adjacent battery cell groups can be achieved by stacking the battery cells 10 upright and upside down.

[0242] Thus, the battery cells can be stacked with the protrusions 112 (electrode terminals) facing upward, stacked with the protrusions 112 (electrode terminals) facing downward, or a mixture of the two. Therefore, not only is the flexibility of the arrangement of the orientations of the battery cells improved, but the pressure relief members 3 are easily staggered by changing the orientations of the battery cells, so that it is not necessary to prepare two types of battery cells with different positions of the pressure relief members 3, which is advantageous in simplifying the manufacturing process of the battery cells, improving production efficiency, and reducing production costs.

[0243] In some embodiments, as shown in FIG. 1A, the first housing wall 11 of each battery cell 10 is located on the same side of the case 1 in the gravity direction Z (for example, the upper side or the lower side as shown in FIG. 1A). Figures 11 to 15 or Figure 17 In some embodiments, as shown in FIG. 1A, the first housing wall 11 of each battery cell 10 is located on the same side of the case 1 in the gravity direction Z (for example, the upper side or the lower side as shown in FIG. 1A). Figure 11 That is, all of the battery cells 10 are upright or all are upside down.

[0244] Thus, all of the battery cells can be arranged in the same orientation in the gravity direction Z, which is advantageous in simplifying the assembly process.

[0245] In some embodiments, as shown in FIG. 1A, the first housing wall 11 of each battery cell 10 is located on the same side of the case 1 in the gravity direction Z (for example, the upper side or the lower side as shown in FIG. 1A). Figure 16 In some embodiments, as shown in FIG. 1A, the first housing wall 11 of each battery cell 10 is located on the same side of the case 1 in the gravity direction Z (for example, the upper side or the lower side as shown in FIG. 1A). Thus, the battery cells can be stacked with the protrusions 112 (electrode terminals) facing upward, stacked with the protrusions 112 (electrode terminals) facing downward, or a mixture of the two. Therefore, not only is the flexibility of the arrangement of the orientations of the battery cells improved, but the pressure relief members 3 are easily staggered by changing the orientations of the battery cells, so that it is not necessary to prepare two types of battery cells with different positions of the pressure relief members 3, which is advantageous in simplifying the manufacturing process of the battery cells, improving production efficiency, and reducing production costs.

[0246] In one specific embodiment, with Figure 16 To illustrate the orientation shown, in the fifth battery cell group 305, the first housing wall 11 of each battery cell is located on the first side of the outer casing 1 along the gravity direction Z (e.g., Figure 16 As shown above), the fourth shell wall 14 is located on the second side of the outer shell 1 along the gravity direction Z (e.g., the upper side), Figure 16 (as shown on the lower side), thus, in the fifth battery cell group 305, the protrusion 112 of the lower one of the two adjacent battery cells along the direction of gravity Z abuts against the fourth shell wall 14 of the upper one.

[0247] In one specific embodiment, with Figure 16 To illustrate the orientation shown, in the sixth battery cell group 306, the first housing wall 11 of each battery cell is located on the second side of the outer casing 1 along the gravity direction Z (e.g., Figure 16 (as shown below), the fourth shell wall 14 is located on the first side of the outer shell 1 along the gravity direction Z (e.g., the lower side), Figure 16 (as shown on the upper side), thus, in the sixth battery cell group 306, the protrusion 112 of the upper one of the two adjacent battery cells along the direction of gravity Z abuts against the fourth shell wall 14 of the lower one.

[0248] Of course, the first side can be the lower side of the outer shell 1, and the second side can be the upper side of the outer shell 1.

[0249] Therefore, by changing the orientation of the battery cells, the pressure relief components 3 between adjacent battery cells along the first direction X can be easily staggered, thus eliminating the need to prepare two types of battery cells with different positions of the pressure relief components 3. This helps to simplify the manufacturing process of battery cells, improve production efficiency, and reduce production costs.

[0250] In some embodiments, such as Figure 3 and Figure 6 , Figures 10 to 17 As shown, in the first housing wall 11, the main body 111 and the protrusion 112 are connected along the first direction X. Multiple battery cells form multiple battery cell groups. Each battery cell group includes multiple battery cells stacked along the gravity direction Z. The multiple battery cell groups are arranged along the second direction Y, wherein the first direction X, the second direction Y and the gravity direction Z are perpendicular to each other.

[0251] In some embodiments, a plurality of battery cell groups 30 are arranged along a first direction X and a plurality of battery cell groups 30 are arranged along a second direction Y (not shown).

[0252] In some embodiments, the pressure relief component 3 is located on the second housing wall 12, and the third housing walls 13 of each battery cell in each battery cell group arranged along the second direction Y and adjacent to each other along the second direction Y are arranged close to each other.

[0253] The adjacent arrangement includes being arranged close to each other, being arranged in contact. In addition, optionally, a spacer can be arranged between the third housing walls 13 adjacent in the second direction Y, which spacer can be, for example, a heat insulation pad, a cushioning pad, a heat conduction pad, etc.

[0254] Thus, the battery device can include more battery monomers, and therefore, the group efficiency can be improved, the space utilization can be improved, and the energy of the battery device can be improved.

[0255] In some embodiments, the housing 1 further includes two second housing walls 12 arranged opposite in the first direction X, and the pressure relief component 3 is arranged on at least one second housing wall 12, and the adjacent battery monomers 10 abut each other in the second direction Y.

[0256] Since the pressure relief component 3 is arranged on the second housing wall 12, it is not necessary to leave a pressure relief channel between the battery monomers arranged in the gravity direction Z and the second direction Y, so that the space occupation in the gravity direction Z and the second direction Y can be reduced, the space utilization can be improved, and the electrical and gas separation can be achieved.

[0257] In some embodiments, as shown in Figure 13 , the first direction X of each battery monomer group has a channel extending in the second direction Y on one side or both sides, and the pressure relief port of the pressure relief component 3 faces the channel in the first direction X (for example, the first channel 41 or the second channel 42 shown in Figure 13 ) and communicates with the channel.

[0258] In some embodiments, along the first direction X, there is a spacing 4 between adjacent battery monomer groups, and along the second direction Y, adjacent spacings 4 form a channel (for example, the first channel 41 or the second channel 42 shown in Figure 11 ), and the eruption material erupted when the battery monomer has thermal runaway can enter the channel.

[0259] In some specific embodiments, as shown in Figure 12 , Figure 16 , Figure 17 or Figure 11 , the first direction X of each battery monomer group has a channel extending in the second direction Y on one side, which is exemplified in the orientation shown in Figure 13 , the right side of the first battery monomer group 301 has a channel, and the left side of the second battery monomer group 302 has a channel.

[0260] In some specific embodiments, as shown in Figure 15 or Figure 13 , the first direction X of each battery monomer group has a channel extending in the second direction Y on both sides, which is exemplified in the orientation shown in Figure 11The orientation shown is for illustration purposes, and each of the first battery monomer groups 301 has a passage on the left and right sides.

[0261] By designing the number and position of the passages and making the pressure relief ports of each battery monomer face the passages, the eruption material erupted when any one of the battery monomers experiences thermal runaway can enter the passages, reducing the impact of the eruption material on adjacent battery monomers and the like, thereby reducing the risk of thermal diffusion.

[0262] In some embodiments, as shown in Figure 12 and Figure 11 , a plurality of first battery monomer groups 301 and a plurality of second battery monomer groups 302 are included in the plurality of battery monomer groups, the passages include a first passage 41, the plurality of first battery monomer groups 301 and the plurality of second battery monomer groups 302 are arranged along a second direction Y, respectively, and each first battery monomer group 301 and each second battery monomer group 302 are arranged along a first direction X in a spaced-apart manner along the first direction X, the intervals 4 are connected along the second direction Y to form the first passage 41, and the pressure relief components 3 of each battery monomer in the first battery monomer group 301 and the pressure relief components 3 of each battery monomer in the second battery monomer group 302 are both facing and connected to the first passage 41 along the first direction X.

[0263] In some embodiments, the plurality of first battery monomer groups 301 are arranged along the second direction Y, the plurality of second battery monomer groups 302 are arranged along the second direction Y, along the first direction X, each first battery monomer group 301 and each second battery monomer group 302 are arranged in a spaced-apart manner, the intervals 4 are connected along the second direction Y to form the first passage 41, the pressure relief components 3 of each battery monomer in the first battery monomer group 301 are facing and connected to the first passage 41 along the first direction X, and the pressure relief components 3 of each battery monomer in the second battery monomer group 302 are facing and connected to the first passage 41 along the first direction X.

[0264] In this way, the first battery monomer group 301 and the second battery monomer group 302 can share the first passage 41, which is conducive to improving the space utilization rate in the battery device.

[0265] In some embodiments, as shown in Figure 14 and Figure 14 , the first passage 41 includes a first passage 411 and a second passage 412, and the first passage 411 and the second passage 412 are separated in the first direction X by a partition 9.

[0266] In some embodiments, the first channel 41 has a partition 9, which separates the first channel 41 into a first passage 411 and a second passage 412 arranged along the first direction X, the pressure relief ports of the pressure relief components 3 of the battery cells in the first battery cell group 301 communicate with the first passage 411, and the pressure relief ports of the pressure relief components 3 of the battery cells in the second battery cell group 302 communicate with the second passage 412.

[0267] In this way, the pressure relief components 3 opposite along the first direction X can be reliably separated by the partition 9, so as to further reduce the risk of thermal runaway of the battery cells, and further reduce the risk of thermal propagation of the battery cells along the first direction X.

[0268] In some embodiments, as shown in FIG. 7, along the first direction X, the distance D2 between the second housing walls 12 towards the first channel 41 is in the range of 14mm to 20mm. Figure 14

[0269] In some embodiments, as shown in FIG. 7, along the first direction X, the distance D2 between the second housing walls 12 towards the first channel 41 is in the range of 14mm to 20mm.

[0270] Optionally, the distance D2 between the second housing walls 12 towards the first channel 41 can be 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, and of course can also be other values within the above range.

[0271] By having a suitable distance between the two second housing walls 12 opposite along the first direction X towards the first channel 41, the space utilization and the risk of thermal propagation can be considered.

[0272] In some embodiments, as shown in FIG. 7, along the first direction X, the distance D1 between the second housing walls 12 towards the first channel 41 and the partition 9 is in the range of 7mm to 10mm. Figure 14

[0273] In some embodiments, as shown in FIG. 7, along the first direction X, the distance D1 between the second housing walls 12 towards the first channel 41 and the partition 9 is in the range of 7mm to 10mm.

[0274] In some embodiments, as shown in FIG. 7, along the first direction X, the distance D1 between the second housing walls 12 towards the first channel 41 and the partition 9 is in the range of 7mm to 10mm.

[0275] ​​Thus, on the one hand, the pressure relief components 3 opposite in the first direction X are reliably separated by the partition 9, and on the other hand, the pressure relief components 3 on both sides of the partition 9 are left with appropriate pressure relief passages, so as to not only reduce the risk of contamination or damage of the pressure relief components 3 of the battery monomers opposite in the first direction X by the eruption of the battery monomers when thermal runaway occurs, but also reduce the risk of local overheating due to limited pressure relief space, thereby triggering larger-scale thermal runaway and other adverse conditions.

[0276] In some embodiments, as shown in Figure 17 and Figure 14 , the plurality of battery monomer groups further includes a plurality of third battery monomer groups 303, the plurality of third battery monomer groups 303 are arranged along the second direction Y, the passages include a first passage 41 and a second passage 42, along the first direction X, the first passage 41 is located on the side of the second battery monomer group 302 close to the first battery monomer group 301, and the second passage 42 is located on the side of the third battery monomer group 303 away from the second battery monomer group 302, the pressure relief components 3 of the battery monomers in the first battery monomer group 301 and the pressure relief components 3 of the battery monomers in the second battery monomer group 302 are directed towards and communicated with the first passage 41 along the first direction X, and the pressure relief components 3 of the battery monomers in the third battery monomer group 303 are directed towards and communicated with the second passage 42 along the first direction X.

[0277] In a specific embodiment, as shown in Figure 17 and Figure 15 , the first battery monomer group 301, the second battery monomer group 302 and the third battery monomer group 303 are arranged along the first direction X, wherein the first battery monomer group 301 and the second battery monomer group 302 are arranged at intervals along the first direction X, along the first direction X, the first passage 41 is located between the first battery monomer group 301 and the second battery monomer group 302, and the pressure relief components 3 of the battery monomers in the first battery monomer group 301 and the pressure relief components 3 of the battery monomers in the second battery monomer group 302 are both directed towards and communicated with the first passage 41; along the first direction X, the second battery monomer group 302 and the third battery monomer group 303 are arranged in close proximity, and the second passage 42 is located on the side of the third battery monomer group 303 away from the second battery monomer group 302, and the pressure relief components 3 of the battery monomers in the third battery monomer group 303 are directed towards and communicated with the second passage 42.

[0278] Thus, in the case of arranging more battery monomers, the space utilization can be improved, and a pressure relief passage can be provided for each battery monomer, thereby reducing the risk of thermal diffusion.

[0279] In some embodiments, as shown in Figures 4 to 9As shown, the plurality of battery cell groups 30 includes a plurality of first battery cell groups 301 and a plurality of second battery cell groups 302, the passages include a first passage 41 and a second passage 42, the plurality of first battery cell groups 301 and the plurality of second battery cell groups 302 are arranged along the second direction Y respectively, and each first battery cell group 301 and each second battery cell group 302 are oppositely arranged along the first direction X with an interval 4 along the first direction X, the interval 4 is connected along the second direction Y to form the first passage 41, along the first direction X, the first passage 41 is located on the side of the second battery cell group 302 close to the first battery cell group 301, the second passage 42 is located on the side of the second battery cell group 302 away from the first battery cell group 301, the pressure relief part 3 of each battery cell in the first battery cell group 301 is directed towards and connected with the first passage 41 along the first direction X, and the pressure relief part 3 of each battery cell in the second battery cell group 302 is directed towards and connected with the second passage 42 along the first direction X.

[0280] In a specific embodiment, as shown, Figure 6 the first battery cell group 301 and the second battery cell group 302 are arranged with an interval along the first direction X, along the first direction X, the first passage 41 is located between the first battery cell group 301 and the second battery cell group 302, and the pressure relief part 3 of the battery cell in the first battery cell group 301 is directed towards and connected with the first passage 41; along the first direction X, the second passage 42 is located on the side of the second battery cell group 302 away from the first battery cell group 301, and the pressure relief part 3 of the battery cell in the second battery cell group 302 is directed towards and connected with the second passage 42.

[0281] Since the pressure relief part 3 of the first battery cell group 301 and the pressure relief part 3 of the second battery cell group 302 are respectively relieved through two pressure relief passages, the eruption of the pressure relief part 3 when relieved will hardly pollute or damage the pressure relief part 3 of the battery cell on the opposite side. It can be seen that the risk of thermal diffusion along the first direction X when the battery cell is in thermal runaway can be reliably reduced.

[0282] In some embodiments, as shown, Figure 6 the battery cell has an electrode assembly located in the shell; the electrode terminal includes a first electrode terminal plate 21 and a second electrode terminal plate 22, the first electrode terminal plate 21 and the second electrode terminal plate 22 are located on the side of the first shell wall 11 away from the electrode assembly 6 along the direction of gravity Z, and the projection of the first electrode terminal plate 21 and the projection of the second electrode terminal plate 22 at least partially overlap in the same projection plane perpendicular to the second direction Y.

[0283] Optionally, the electrode terminals can be two, three, four or the like, including electrode terminals of opposite polarity. When the electrode terminals are two, the polarities of the two electrode terminals can be opposite. The two electrode terminals can be one negative and the other positive.

[0284] Optionally, the electrode terminal plate can be a cuboid, a triangular prism, an "L" shape or other irregular shape, etc. The shapes of the first electrode terminal plate 21 and the second electrode terminal plate 22 can be the same or different.

[0285] In the same projection plane perpendicular to the second direction Y, the projection of the first electrode terminal plate 21 and the projection of the second electrode terminal plate 22 can partially or almost entirely overlap.

[0286] It should be noted that each electrode terminal can include other components in addition to the electrode terminal plate, for example, it can also include an electrode terminal disc for connecting with the tab, a connecting column for connecting the electrode terminal plate with the electrode terminal disc. In addition, an insulating member or the like can be further provided between the battery terminal and the first shell wall 11. The structure of the battery terminal can adopt the existing structure, which will not be traced here.

[0287] Thus, the first electrode terminal plate 21 and the second electrode terminal plate 22 can be arranged compactly along the first direction X, reducing the position space occupied in the first direction X, so that the protruding portion 112 can be designed larger, improving the support stability; moreover, designing the protruding portion 112 larger is conducive to improving the support area, thereby being conducive to improving the support strength and support rigidity, and being conducive to stacking more battery monomers along the gravity direction Z.

[0288] In some embodiments, as shown in Figure 6 the first electrode terminal plate 21 and the second electrode terminal plate 22 of each battery monomer 10 located in the same layer along the gravity direction Z are arranged alternately along the second direction Y, the polarities of the first electrode terminal plate 21 and the second electrode terminal plate 22 are opposite, and the battery device further includes a bus member 7, the adjacent first electrode terminal plate 21 and the second electrode terminal plate 22 in the two battery monomers adjacent along the second direction Y are connected through the bus member 7.

[0289] Among the battery monomers located in the same layer along the gravity direction Z, and among the battery monomers adjacent along the second direction Y, the polarities of the electrode terminal plates located in different battery monomers and close to each other along the second direction Y are opposite, thereby facilitating the electrical connection between the adjacent battery monomers along the second direction Y through the bus member 7.

[0290] Thus, the electrical connection between the adjacent battery monomers along the second direction Y can be easily realized.

[0291] In some embodiments, as shown in Figure 3As shown, along the gravity direction Z, the busbar 7 does not protrude beyond the protruding portion 112.

[0292] Optionally, as shown in the orientation, Figure 10 As shown in the orientation, along the gravity direction Z, the busbar 7 can be substantially flush with the protruding portion 112, or the busbar 7 can be lower than the protruding portion 112.

[0293] Therefore, the dimension of each battery cell group along the gravity direction Z does not increase due to the arrangement of the busbar 7, thus facilitating the improvement of the volume utilization.

[0294] In some embodiments, as shown in the orientation, Figures 10 to 17 and Figure 3 As shown, along the gravity direction Z, the battery device 100 includes a plurality of battery cell layers, each battery cell layer is stacked along the gravity direction Z, and each battery cell layer includes a plurality of battery cells 10. The battery device 100 further includes a plurality of support plates 8, each support plate 8 is located between adjacent battery cell layers along the gravity direction Z, and the adjacent battery cell layers abut each other with the support plate 8 in between.

[0295] It is to be noted that, Figure 3 Only one battery cell layer is shown, and the battery cell layer can have multiple layers along the gravity direction Z.

[0296] In some embodiments, each battery cell layer includes a plurality of battery cells 10 arranged along the first direction X and / or the second direction Y, and each support plate 8 is located between adjacent battery cell layers along the gravity direction Z, and the adjacent battery cell layers abut each other with the support plate 8 in between.

[0297] In some embodiments, the shape of the support plate 8 is not limited in the present application. For example, the support plate 8 can be plate-shaped, thus reducing the dimension of the support plate 8 along the gravity direction Z, and further reducing the height of the battery device.

[0298] Therefore, the pressure borne by the lower battery cells 10 can be dispersed, the stacking stability along the gravity direction Z can be improved, the number of stacked layers along the gravity direction Z can be increased, and the volume utilization and energy of the battery device can be improved.

[0299] In some embodiments, as shown in the orientation, Figure 3 In the same battery cell layer, part or all of the plurality of battery cells arranged along the first direction X abut the same support plate 8; and / or, in the same battery cell layer, part or all of the plurality of battery cells arranged along the second direction Y abut the same support plate 8; and / or, the support plate 8 is configured to be at least surface-insulating; and / or, along the gravity direction Z, at least one side of the battery cell is bonded to the support plate 8.

[0300] In the same battery cell layer, at least some or all of the battery cells abut against the same support plate 8. Specifically, some of the battery cells arranged along the first direction X abut against the same support plate 8, and some of the battery cells arranged along the second direction Y abut against the same support plate 8. This can disperse the pressure borne by the battery cells in the lower layer and improve the integrity of the battery cells in the same battery cell layer.

[0301] In some embodiments, the support plate 8 is configured such that at least its surface is insulated. Optionally, the support plate 8 may be made of an insulating material, such as insulating resin; or the support plate 8 may be made of steel, aluminum, titanium, or other materials, wherein the outer surface of the support plate 8 has an insulating coating.

[0302] In some embodiments, along the direction of gravity Z, at least one side of the battery cell is bonded to the support plate 8, for example, by structural adhesive.

[0303] This allows for the distribution of pressure on the lower battery cells and improves the overall integrity of the battery cells within the same battery cell layer, further enhancing the stacking stability along the gravity direction Z. Moreover, the support plate 8 has insulation properties, which helps reduce the risk of leakage.

[0304] In some embodiments, such as Figures 11 to 17 As shown, the battery device 100 also includes a housing 20, with at least one end of the support plate 8 supported on the housing wall 201 of the housing; and / or, the battery device 100 also includes a housing 20 and a beam member (not shown) disposed in the housing, with at least one end of the support plate 8 supported on the beam member (not shown).

[0305] In some embodiments, such as Figure 10 As shown, the battery device includes a housing 20, which may include a first housing 20A and a second housing 20B. The first housing 20A and the second housing 20B are fastened together to form a closed space inside the housing 20 to house the battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 20A may be a top cover or a bottom plate.

[0306] In some embodiments, at least one end of the support plate 8 is supported on the box wall 201 of the box body. Further, both ends of the support plate 8 along the first direction X are supported on the box wall 201 of the box body, and both ends of the support plate 8 along the second direction Y are also supported on the box wall 201 of the box body.

[0307] In some embodiments, the box 20 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that an enclosed space is formed inside the box to accommodate the battery monomer group. The frame includes beam members (not shown), at least one end of the support plate 8 is supported on the beam members, and further, both ends of the support plate 8 along the first direction X and / or the second direction Y are supported on the beam members.

[0308] As an example, the box can be part of the chassis structure of a vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beams and longitudinal beams of the vehicle.

[0309] In this way, the pressure borne by the lower layer of battery monomers can be dispersed by the support plate 8 supported on the box wall 201 or the beam member, the stacking stability along the gravity direction Z can be improved, the number of layers along the gravity direction Z can be increased, and the volume utilization and energy of the battery device can be improved.

[0310] In some embodiments, as shown in Figure 10 and Figure 5 The battery device 100 further includes a heat exchange plate (not shown) between the battery monomers 10 adjacent along the second direction Y, the battery monomers 10 adjacent along the second direction Y abut each other with the heat exchange plate therebetween, and the plurality of battery monomers 10 arranged along the first direction X abut the same heat exchange plate.

[0311] In the same projection plane perpendicular to the second direction Y, the projection of the battery monomer is within the range of the projection of the heat exchange plate abutting it.

[0312] In this way, not only the stacking stability can be improved by the support plate 8, but also the battery monomers can be heat managed, and the use reliability of the battery device can be improved.

[0313] In some embodiments, as shown in Figure 8 The thickness H1 of the support plate 8 is within the range of 2mm to 7mm; and / or, the thickness H1 of the support plate 8 is within the range of 3mm to 6mm.

[0314] As an example, the thickness H1 of the support plate 8 refers to the distance between the upper surface of the support plate 8 and the lower surface of the support plate 8. Figure 8

[0315] Optionally, the thickness H1 of the support plate 8 can be 2mm, 3mm, 4mm, 5mm, 6mm or 7mm, of course, it can also be other values within the above range.

[0316] In this way, the support plate 8 with appropriate thickness is conducive to improving the stacking stability and improving the volume utilization; and it provides design space for designing the support plate 8 as a heat management component.​

[0317] In some embodiments, the support plate 8 comprises a thermal management component.

[0318] For example, the support plate 8 can be a liquid cooling plate.

[0319] In this way, the support plate 8 not only improves the stability of the battery monomer stack as described above, but also manages the heat of the battery monomer, improves the use reliability of the battery device, and does not need to additionally set a thermal management component, thereby improving the volume utilization rate.

[0320] In some embodiments, as shown in Figure 8 and Figure 5 In the first shell wall 11, the body part 111 is connected to the protruding part 112 along the first direction X, and the length L1 of the first shell wall 11 along the first direction X is in the range of 120mm to 1200mm.

[0321] The length L1 of the first shell wall 11 along the first direction X refers to the distance between the two edges of the first shell wall 11 along the first direction X.

[0322] Optionally, the length L1 of the first shell wall 11 along the first direction X can be 120mm, 150mm, 200mm, 250mm, 300mm, 400mm, 500mm, 600mm, 700mm, 800mm, 1000mm, 1050mm, 1100mm, 1150mm, 1180mm or 1200mm, and of course, other values within the above range are also possible.

[0323] In this way, the embodiments of the present application can be applied to battery monomers of various length specifications according to actual conditions, and a battery device with a high volume utilization rate and high energy that matches the installation space of the battery device can be made. Moreover, the battery monomer is designed to be longer, which is conducive to reducing the proportion of space occupied by the pressure relief channel and improving the space utilization rate.

[0324] In some embodiments, the length of the first shell wall 11 along the first direction X is in the range of 120mm to 600mm.

[0325] Optionally, the length L1 of the first shell wall 11 along the first direction X can be 120mm, 180mm, 220mm, 260mm, 320mm, 360mm, 420mm, 460mm, 520mm, 560mm or 600mm, and of course, other values within the above range are also possible.

[0326] In this way, the embodiments of the present application can be applied to battery monomers of various length specifications according to actual conditions, and a battery device with a high volume utilization rate and high energy that matches the installation space of the battery device can be made.

[0327] In some embodiments, the length of the first housing wall 11 along the first direction X is in the range of 150mm to 400mm.

[0328] Optionally, the length L1 of the first housing wall 11 along the first direction X can be 150mm, 160mm, 170mm, 210mm, 230mm, 270mm, 290mm, 310mm, 330mm, 370mm, 390mm or 400mm, etc., and of course, other values within the above range are also possible.

[0329] Therefore, according to actual conditions, the embodiments of the present application can be applied to battery monomers of various length specifications, and thus a battery device with a high volume utilization rate and high energy that matches the installation space of the battery device can be made.

[0330] In some embodiments, as shown in Figure 4 and Figure 4 The ratio of the length of the protruding portion 112 along the first direction X to the length of the first housing wall 11 along the first direction X is greater than 50% and less than 98%.

[0331] The length of the protruding portion 112 along the first direction X refers to the distance between the two sides of the protruding portion 112 along the first direction X. Taking one protruding portion 112 as an example, the length of the protruding portion 112 along the first direction X is the length L2 as shown in Figure 5 Taking two protruding portions 112 as an example, the length of the protruding portion 112 along the first direction X is the sum of the length L3 and the length L4 as shown in Figure 5 When there are more protruding portions 112, the length of the protruding portion 112 along the first direction X refers to the sum of the lengths of the protruding portions 112 along the first direction X.

[0332] The ratio of the length L2 or the sum of the length L3 and the length L4 of the protruding portion 112 along the first direction X to the length L1 of the first housing wall 11 along the first direction X can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 82%, 84%, 87%, 90%, 92%, 95% or 98%, etc., and of course, other values within the above range are also possible.

[0333] Therefore, by designing the protruding portion 112 to be more than half the length of the first housing wall 11 along the first direction X, a large enough contact surface is provided to provide support, which is conducive to improving the stability of the stack along the gravity direction Z.

[0334] In some embodiments, as shown in Figure 4As shown, the width L5 of the first shell wall 11 along the second direction Y is in the range of 12mm to 90mm, wherein the first direction X, the second direction Y and the gravity direction Z are perpendicular to each other.

[0335] The width L5 of the first shell wall 11 along the second direction Y refers to the distance between the two edges of the first shell wall 11 along the second direction Y.

[0336] Optionally, the width L5 of the first shell wall 11 along the second direction Y can be 12mm, 15mm, 17mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 85mm, 87mm or 90mm, etc., and of course, other values within the above range are also possible.

[0337] Therefore, according to actual conditions, the embodiments of the present application can be applied to battery monomers of various width specifications, and thus a battery device with a high volume utilization rate and high energy that matches the installation space of the battery device can be made.

[0338] In some embodiments, as shown, Figure 4 The width L5 of the first shell wall 11 along the second direction Y is in the range of 25mm to 45mm.

[0339] Optionally, the width L5 of the first shell wall 11 along the second direction Y can be 25mm, 27mm, 29mm, 31mm, 33mm, 37mm, 39mm, 41mm, 43mm or 45mm, etc., and of course, other values within the above range are also possible.

[0340] Therefore, according to actual conditions, the embodiments of the present application can be applied to battery monomers of various width specifications, and thus a battery device with a high volume utilization rate and high energy that matches the installation space of the battery device can be made.

[0341] In some embodiments, as shown, Figure 3 The maximum height H2 of the battery monomer 10 along the gravity direction Z is in the range of 80mm to 250mm.

[0342] The maximum height H2 of the battery monomer along the gravity direction Z refers to the distance between the two edges of the battery monomer along the gravity direction Z that are farthest apart (for example, Figure 2 As shown, the distance between the outer surface of the fourth shell wall 14 and the upper surface of the protruding portion 112 along the gravity direction Z).

[0343] Optionally, the maximum height H2 of the battery cell along the direction of gravity Z can be 80mm, 90mm, 100mm, 150mm, 200mm, 210mm, 220mm, 230mm, 240mm or 250mm, etc., or other values ​​within the above range.

[0344] Therefore, the embodiments of this application can be applied to various battery cells of different heights according to actual conditions, thereby producing a battery device that matches the installation space of the battery device and has high volume utilization and high energy.

[0345] In some embodiments, the maximum height of the battery cell 10 along the gravity direction Z is in the range of 100mm to 200mm.

[0346] The maximum height of the battery cell 10 along the direction of gravity Z is, for example, the distance from the surface of the protrusion 112 in the first housing wall 11 (on the surface outside the outer casing 1) to the surface of the fourth housing wall 14 (on the surface outside the outer casing 1).

[0347] Optionally, the maximum height H2 of the battery cell 10 along the direction of gravity Z can be 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 1700mm, 1800mm, 190mm or 200mm, etc., or other values ​​within the above range.

[0348] Therefore, the embodiments of this application can be applied to various battery cells of different heights according to actual conditions, thereby producing a battery device that matches the installation space of the battery device and has high volume utilization and high energy.

[0349] In some embodiments, such as Figures 3 to 17 As shown, the outer casing 1 includes at least one of a steel casing, an aluminum casing, and a titanium alloy casing; and / or, the casing wall thickness H3 of the outer casing 1 is in the range of 0.1 mm to 2.0 mm; and / or, the hardness of the outer casing 1 is in the range of Vickers hardness HV10 to HV400.

[0350] Optionally, the wall thickness H3 of the outer casing 1 can be 0.1mm, 0.2mm, 0.3mm, 0.5mm, 0.7mm, 0.9mm, 1.1mm, 1.4mm, 1.5mm, 1.7mm, 1.8mm or 2.0mm, etc., or other values ​​within the above range.

[0351] Optionally, the hardness of the shell 1 can be HV10, HV20, HV50, HV80, HV100, HV120, HV150, HV200, HV250, HV300, HV320, HV340, HV360, HV380 or HV400, etc., of course, other values within the above range can also be used.

[0352] Thus, since the steel shell 1, the aluminum shell 1 and the titanium alloy shell 1 can be used, not only the welding can be easily performed, but even if the commonly used shell 1 material is used, the multilayer stacking along the gravity direction Z can be realized, and the volume utilization rate is improved; since the shell body wall of the shell 1 is at a proper thickness, the rigidity and the volume utilization rate of the shell 1 can be considered; since the shell 1 has a proper hardness, the rigidity, the volume utilization rate and the processing easiness of the shell 1 can be considered.

[0353] In some embodiments, as shown in ​ the battery monomer further includes an electrode assembly 6, the shell 1 has a plurality of shell body walls including the first shell body wall 11, the plurality of shell body walls define a closed containing space, the electrode assembly 6 is received in the containing space, among the plurality of shell body walls, two second shell body walls 12 are oppositely arranged along the first direction X, and the length of the electrode assembly 6 relative to the distance between the opposite wall surfaces of the two second shell body walls 12 along the first direction X is greater than 90% and less than 100%.

[0354] The length L6 of the electrode assembly 6 along the first direction X refers to the longest length of the electrode assembly 6 along the first direction X, and the distance L7 between the opposite wall surfaces of the second shell body wall 12 refers to the distance between the inner surfaces of the two second shell body walls 12.

[0355] The length L6 of the electrode assembly 6 relative to the distance L7 between the opposite wall surfaces of the two second shell body walls 12 along the first direction X can be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%, etc., of course, other values within the above range can also be used.

[0356] Thus, not only the battery monomer and even the battery device can have a higher volume utilization rate, but also a certain supporting force can be provided by the electrode assembly 6, and the degree of bending deformation of the second shell body wall 12 along the first direction X is reduced.

[0357] In some embodiments, among the plurality of shell body walls, two third shell body walls 13 are oppositely arranged along the second direction Y, and the width of the electrode assembly 6 relative to the distance between the opposite wall surfaces of the two third shell body walls 13 along the second direction Y is greater than 90% and less than 100%.

[0358] Along the second direction Y, the width L8 of the electrode assembly 6 refers to the distance between the two edges of the electrode assembly 6 along the second direction Y, and the distance L9 between the opposite wall surfaces of the third housing wall 13 refers to the distance between the inner surfaces of the two third housing walls 13.

[0359] Along the second direction Y, the ratio of the width L8 of the electrode assembly 6 to the distance L9 between the opposite wall surfaces of the third housing wall 13 can be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%, etc., and of course, other values within the above range are also possible.

[0360] In this way, not only can the battery monomer and even the battery device have a higher volume utilization rate, but also a certain supporting force can be provided by the electrode assembly 6 to reduce the degree of flexural deformation of the third housing wall 13 in the second direction Y within a range close to the full length along the first direction X.

[0361] In some embodiments, among the plurality of housing walls, the first housing wall 11 and the fourth housing wall 14 are oppositely arranged along the gravity direction Z, and along the gravity direction Z, the ratio of the height of the electrode assembly 6 to the distance between the opposite wall surfaces of the protruding portion 112 in the first housing wall 11 and the fourth housing wall 14 is greater than 80% and less than 100%.

[0362] Along the gravity direction Z, the height of the electrode assembly 6 refers to the distance between the two edges of the electrode assembly 6 along the gravity direction Z, wherein along the gravity direction Z, the height of the electrode assembly 6 refers to the height of the stack formed by the positive and negative electrode plates in the electrode assembly along the gravity direction Z.

[0363] The distance between the opposite wall surfaces of the first housing wall 11 and the fourth housing wall 14 refers to the distance between the inner surface of the first housing wall 11 and the inner surface of the third housing wall 13.

[0364] Along the gravity direction Z, the ratio of the height of the electrode assembly 6 to the distance between the opposite wall surfaces of the protruding portion 112 in the first housing wall 11 and the fourth housing wall 14 can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100%, etc., and of course, other values within the above range are also possible.

[0365] In this way, not only can the battery monomer and even the battery device have a higher volume utilization rate, but also a certain supporting force can be provided by the electrode assembly 6 to reduce the degree of flexural deformation of the third housing wall 13 in the second direction Y within a range close to the full length along the first direction X.

[0366] In some embodiments, as shown in ​ The battery device 100 further includes a box 20, and a plurality of battery cell groups 30 are formed by the plurality of battery cells 10, each battery cell group 30 includes a plurality of battery cells 10 stacked along the gravity direction Z, each battery cell group is accommodated in the box 20, and the box 20 has a top plate and a bottom plate opposite along the gravity direction Z, and each battery cell group abuts at least one of the top plate and the bottom plate.

[0367] Each battery cell group 30 can abut the top plate or the bottom plate, or abut both the top plate and the bottom plate.

[0368] Therefore, the stacking stability of the battery cell group 30 can be improved; in the case where each battery cell group 30 abuts both the top plate and the bottom plate (directly or indirectly), the stacking stability of the battery cell group can be further improved, and the space utilization can be further improved.

[0369] In a second aspect, the embodiments of the present application further provide a power consumption device, which includes the battery device 100 provided by the first aspect of the embodiments of the present application, and the battery device is used for storing electric energy and powering the power consumption device.

[0370] Since the battery device can improve the volume utilization as above, the space occupied by the battery device in the power consumption device can be reduced, or the battery device installation space in the power consumption device can be fully utilized, the energy of the battery device can be improved, and the endurance of the power consumption device can be improved.

[0371] In a third aspect, the embodiments of the present application further provide an energy storage device 2000, which includes the battery device 100 provided by the first aspect of the embodiments of the present application, and the battery device is used for storing electric energy and providing electric energy.

[0372] ​ The energy storage device 2000 provided by some embodiments of the present application is shown in a structural schematic diagram. The energy storage device 2000 includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0373] Since the battery device can improve the volume utilization as above, the volume of the energy storage device can be reduced, or the storage energy of the energy storage device can be improved.

[0374] In the following, a specific example of the embodiments of the present application is described.

[0375] In a specific embodiment, as shown in​ As shown, the battery cells 10 are stacked in the box 20 in the height direction of the battery cells, and the pressure relief components 3 are located at the side of the battery cells 10, so that the space occupied by the battery cell group 30 in the gravity direction Z can be reduced, and the space utilization of the battery device can be improved.

[0376] Further, the length L1 of the battery cell in the first direction X is in the range of 150mm to 400mm. In this way, the length of the battery cell in the first direction X is longer, so that the proportion of the space occupied by the exhaust passage of the pressure relief component 3 can be reduced, and the space utilization in the box can be further improved.

[0377] In some embodiments, along the first direction X, the pressure relief components 3 of two adjacent battery cells share the same passage (such as the first passage 41 or the second passage 42), so that the space utilization in the box can be further improved.

[0378] In some embodiments, along the gravity direction Z, the electrode terminal 2 does not protrude beyond the protruding portion 112 on the side where the protruding portion 112 protrudes. This is conducive to stacking the battery cells in the gravity direction Z, and is conducive to improving the space utilization of the box in the gravity direction Z, and the protruding portion 112 can provide strength support to the battery cell above it.

[0379] In some embodiments, in the projection perpendicular to the second direction Y, the projection of the first electrode terminal plate 21 and the projection of the second electrode terminal plate 22 at least partially overlap, which is conducive to electrical connection between adjacent battery cells in the second direction Y.

[0380] The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered in the scope of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner.

Claims

1. A battery device, characterized by, comprise at least two battery cells, each of the battery cells comprises: a housing including a first housing wall at at least one side end of the housing in a gravitational direction, the first housing wall including a body portion and a protrusion portion protruding in the gravitational direction from the body portion; an electrode terminal provided to the body portion; a plurality of the battery cells are stacked along the gravitational direction, the protrusion portion abutting against an adjacent one of the battery cells.

2. The battery device according to claim 1, wherein in the first housing wall, the body portion and the protrusion portion are connected along a first direction, the first housing wall includes one of the protrusion portions, the electrode terminal is located at one side or both sides of the protrusion portion in the first direction, the first direction being perpendicular to the gravitational direction.

3. The battery device according to claim 1, wherein in the first housing wall, the body portion and the protrusion portion are connected along a first direction, the first housing wall includes at least two of the protrusion portions, the electrode terminal is located between two of the protrusion portions adjacent in the first direction, the first direction being perpendicular to the gravitational direction.

4. The battery device according to any one of claims 1 to 3, wherein in the first housing wall, the body portion and the protrusion portion are connected along a first direction, the housing further includes two second housing walls disposed opposite to each other in the first direction, the battery cell further includes a pressure relief member provided to at least one of the second housing walls, the first direction being perpendicular to the gravitational direction.

5. The battery device according to claim 4, wherein the housing further includes two third housing walls, the first housing walls and the second housing walls having areas smaller than an area of the third housing walls.

6. The battery device according to claim 4, wherein a plurality of the battery cells form a plurality of battery cell groups each including a plurality of the battery cells stacked in the gravitational direction, the plurality of the battery cell groups include a first battery cell group and a second battery cell group, the first battery cell group and the second battery cell group are arranged in a first direction at a spaced interval in the first direction, at least some of the battery cells in the first battery cell group and / or at least some of the battery cells in the second battery cell group being arranged such that the pressure relief members thereof face the interval.

7. The battery device according to claim 6, wherein the first battery cell group and the second battery cell group are arranged such that the pressure relief members of the battery cells in the first battery cell group and the pressure relief members of the battery cells in the second battery cell group both face the interval.

8. The battery device according to claim 6, wherein the pressure relief members of the battery cells in the first battery cell group and the pressure relief members of the battery cells in the second battery cell group are arranged staggered in the gravitational direction.

9. The battery device according to claim 6, wherein In the same projection plane perpendicular to the first direction, the projection of the pressure relief member of each battery cell in the first battery cell group does not overlap with the projection of the pressure relief member of each battery cell in the second battery cell group.

10. The battery device according to claim 6, wherein In the same battery cell group, the pressure relief member of at least one battery cell is oriented differently from the pressure relief members of the other battery cells.

11. The battery device according to claim 6, wherein In the same battery cell group, the pressure relief members of adjacent battery cells in the direction of gravity are oriented in opposite directions along the first direction, In the same layer, the pressure relief members of the battery cells in the first battery cell group and the battery cells in the second battery cell group are each oriented in the same direction along the first direction.

12. The battery device according to claim 6, wherein The battery cells in the first battery cell group and the battery cells in the second battery cell group are each arranged with the pressure relief members oriented in the same direction.

13. The battery device according to claim 7, wherein The plurality of battery cell groups further includes a third battery cell group, the pressure relief members of the battery cells of the third battery cell group are oriented in the same direction along the first direction as the pressure relief members of the battery cells of the first battery cell group, and the second battery cell group is positioned between the first battery cell group and the third battery cell group along the first direction.

14. The battery device according to claim 4, wherein The plurality of battery cells forms a plurality of battery cell groups, each of the battery cell groups includes a plurality of battery cells stacked in the direction of gravity, the plurality of battery cell groups includes a second battery cell group and a third battery cell group, The second battery cell group and the third battery cell group are arranged in a first direction, and the pressure relief members of the battery cells in the third battery cell group are each oriented in the first direction away from the second battery cell group, and the pressure relief members of the battery cells in the second battery cell group are each oriented in the first direction away from the third battery cell group.

15. The battery device according to any one of claims 1 to 3, wherein The housing further includes a fourth housing wall, the first housing wall is positioned on one side of the housing in the direction of gravity, and the fourth housing wall is positioned on the other side of the housing in the direction of gravity, The plurality of battery cells forms a plurality of battery cell groups, each of the battery cell groups includes a plurality of battery cells stacked in the direction of gravity, In the same battery cell group, the protrusion of one of the two adjacent battery cells positioned below in the direction of gravity abuts against the fourth housing wall of the other battery cell positioned above; or In the same battery cell group, the protrusion of one of the two adjacent battery cells positioned above in the direction of gravity abuts against the fourth housing wall of the other battery cell positioned below.

16. The battery device according to claim 15, wherein The first housing wall is positioned on the same side of the housing in the direction of gravity between each of the battery cells.

17. The battery device according to claim 15, wherein the plurality of battery cell groups includes a fifth battery cell group and a sixth battery cell group, in the fifth battery cell group, the first casing wall of each battery cell is located on a first side of the housing along a gravity direction, and the fourth casing wall is located on a second side of the housing along the gravity direction, in the sixth battery cell group, the first casing wall of each battery cell is located on the second side of the housing along the gravity direction, and the fourth casing wall is located on the first side of the housing along the gravity direction.

18. The battery device according to any one of claims 1 to 3, wherein in the first casing wall, the body portion and the protruding portion are connected along a first direction, the plurality of battery cells form a plurality of battery cell groups, each battery cell group includes a plurality of battery cells stacked along a gravity direction, and the plurality of battery cell groups are arranged along a second direction, wherein the first direction, the second direction, and the gravity direction are perpendicular to each other.

19. The battery device according to claim 18, wherein the housing further includes two second casing walls arranged opposite to each other along the first direction, and a pressure relief component is provided on at least one of the second casing walls, along the second direction, adjacent battery cells abut each other.

20. The battery device according to claim 19, wherein on one side or both sides of each battery cell group along the first direction, a passage extending along the second direction is provided, and a pressure relief opening of the pressure relief component faces the passage along the first direction and communicates with the passage.

21. The battery device according to claim 20, wherein the plurality of battery cell groups includes a plurality of first battery cell groups and a plurality of second battery cell groups, and the passage includes a first passage, the plurality of first battery cell groups and the plurality of second battery cell groups are respectively arranged along a second direction, and each of the first battery cell groups and each of the second battery cell groups are arranged opposite to each other along the first direction with a spacing therebetween along the first direction, and the spacing communicates along the second direction to form the first passage, the pressure relief component of each battery cell in the first battery cell groups and the pressure relief component of each battery cell in the second battery cell groups both face the first passage along the first direction and communicate with the first passage.

22. The battery device according to claim 21, wherein the first passage includes a first channel and a second channel, and the first channel and the second channel are separated by a partition along the first direction.

23. The battery device according to claim 21, wherein along the first direction, a distance between the second casing walls facing the first passage is in a range of 14 mm to 20 mm.

24. The battery device according to claim 22, wherein along the first direction, a distance between the second casing walls facing the first passage and the partition is in a range of 7 mm to 10 mm.

25. The battery device according to claim 21, wherein The plurality of battery cell groups further includes a plurality of third battery cell groups arranged along a second direction, and the passages include a first passage and a second passage, along the first direction, the first passage is located on a side of the second battery cell group close to the first battery cell group, and the second passage is located on a side of the third battery cell group away from the second battery cell group, the pressure relief components of the battery cells in the first battery cell group and the pressure relief components of the battery cells in the second battery cell group are arranged along the first direction towards and in communication with the first passage, and the pressure relief components of the battery cells in the third battery cell group are arranged along the first direction towards and in communication with the second passage.

26. The battery device according to claim 20, wherein the plurality of battery cell groups includes a plurality of first battery cell groups and a plurality of second battery cell groups, and the passages include a first passage and a second passage, the plurality of first battery cell groups and the plurality of second battery cell groups are respectively arranged along a second direction, and each of the first battery cell groups and each of the second battery cell groups are arranged along a first direction at intervals spaced apart along the first direction, and the intervals are in communication along the second direction to form the first passage, along the first direction, the first passage is located on a side of the second battery cell group close to the first battery cell group, and the second passage is located on a side of the second battery cell group away from the first battery cell group, the pressure relief components of the battery cells in the first battery cell groups are arranged along the first direction towards and in communication with the first passage, and the pressure relief components of the battery cells in the second battery cell groups are arranged along the first direction towards and in communication with the second passage.

27. The battery device according to claim 18, wherein the battery cell has an electrode assembly located in the housing, the electrode terminal includes a first electrode terminal plate and a second electrode terminal plate, the first electrode terminal plate and the second electrode terminal plate are located on a side of the first housing wall away from the electrode assembly along a direction of gravity, in the same projection plane perpendicular to the second direction, a projection of the first electrode terminal plate and a projection of the second electrode terminal plate at least partially overlap.

28. The battery device according to claim 27, wherein the first electrode terminal plate and the second electrode terminal plate of each of the battery cells located on the same layer along the direction of gravity are arranged along the second direction alternately, and polarities of the first electrode terminal plate and the second electrode terminal plate are opposite, the battery device further includes a busbar, adjacent first electrode terminal plates and second electrode terminal plates of two adjacent battery cells along the second direction are connected by the busbar.

29. The battery device according to claim 28, wherein along the direction of gravity, the busbar does not protrude beyond the protruding portion towards a side of the protruding portion protruding.

30. The battery device according to any one of claims 1 to 3, wherein the battery device comprises a plurality of battery cell layers in a gravitational direction, each of the battery cell layers being stacked in the gravitational direction, and each of the battery cell layers comprising a plurality of battery cells, wherein the battery device further comprises a plurality of support plates, each of the support plates being positioned between adjacent battery cell layers in the gravitational direction, and each of the adjacent battery cell layers abutting each other with the support plate therebetween.

31. The battery device according to claim 30, wherein in each of the battery cell layers, some or all of the battery cells arranged in a first direction abut the same support plate, and / or in each of the battery cell layers, some or all of the battery cells arranged in a second direction abut the same support plate, and / or the support plate is configured to be at least a surface thereof is insulating, and / or the battery cell is at least one side thereof bonded to the support plate in the gravitational direction.

32. The battery device according to claim 30, wherein the battery device further comprises a case, and at least one end of the support plate is supported by a case wall of the case, and / or the battery device further comprises a case and a beam member provided to the case, and at least one end of the support plate is supported by the beam member.

33. The battery device according to claim 30, wherein the battery device further comprises a plurality of heat exchange plates, each of the heat exchange plates being positioned between adjacent battery cells in a second direction, and each of the adjacent battery cells abutting each other with the heat exchange plate therebetween, and each of the battery cells arranged in a first direction abuts the same heat exchange plate.

34. The battery device according to claim 30, wherein the support plate has a thickness in a range of 2 mm to 7 mm, and / or the support plate has a thickness in a range of 3 mm to 6 mm.

35. The battery device according to claim 30, wherein the support plate comprises a thermal management member.

36. The battery device according to any one of claims 1 to 3, wherein the body portion and the protruding portion are connected in a first direction on the first housing wall, and a length of the first housing wall in the first direction is in a range of 120 mm to 1200 mm.

37. The battery device according to claim 36, wherein the length of the first housing wall in the first direction is in a range of 120 mm to 600 mm.

38. The battery device according to claim 37, wherein the length of the first housing wall in the first direction is in a range of 150 mm to 400 mm.

39. The battery device according to claim 36, wherein a ratio of a length of the protruding portion in the first direction to a length of the first housing wall in the first direction is in a range of 50% or more and 98% or less.

40. The battery device according to claim 36, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first shell wall has a width along a second direction in a range from 12 mm to 90 mm, wherein the first direction, the second direction, and a direction of gravity are perpendicular to each other.

41. The battery device of claim 40, wherein, The first shell wall has a width along a second direction in a range from 25 mm to 45 mm.

42. The battery device of claim 36, wherein, The battery cell has a maximum height along a direction of gravity in a range from 80 mm to 250 mm.

43. The battery device of claim 42, wherein, The battery cell has a maximum height along a direction of gravity in a range from 100 mm to 200 mm.

44. The battery device of any one of claims 1 to 3, wherein, The housing comprises at least one of a steel housing, an aluminum housing, a titanium alloy housing; and / or, The housing has a shell wall thickness in a range from 0.1 mm to 2.0 mm; and / or, The housing has a hardness in a range from Vickers hardness HV10 to HV400.

45. The battery device of any one of claims 1 to 3, wherein, The battery cell further comprises an electrode assembly, the housing has a plurality of shell walls including the first shell wall, the plurality of shell walls defining an enclosed accommodation space, the electrode assembly is received in the accommodation space, Among the plurality of shell walls, two second shell walls are oppositely arranged along a first direction, Along the first direction, a length of the electrode assembly relative to a distance between opposite wall surfaces of the two second shell walls is greater than 90% and less than 100%.

46. The battery device of claim 45, wherein, Among the plurality of shell walls, two third shell walls are oppositely arranged along a second direction, Along the second direction, a width of the electrode assembly relative to a distance between opposite wall surfaces of the two third shell walls is greater than 90% and less than 100%.

47. The battery device of claim 45, wherein, Among the plurality of shell walls, a first shell wall and a fourth shell wall are oppositely arranged along a direction of gravity, Along the direction of gravity, a height of the electrode assembly relative to a distance between the protrusion of the first shell wall and the fourth shell wall is greater than 80% and less than 100%.

48. The battery device of any one of claims 1 to 3, wherein, The battery device further comprises a box, A plurality of the battery cells form a plurality of battery cell groups, each of the battery cell groups comprises a plurality of battery cells stacked along a direction of gravity, and each of the battery cell groups is received in the box, The box has a top plate and a bottom plate oppositely arranged along the direction of gravity, and each of the battery cell groups abuts at least one of the top plate and the bottom plate.

49. An electrical device, comprising: The power consuming device comprises the battery device of any one of claims 1 to 48, the battery device is configured to store electrical energy and provide electrical energy for the power consuming device.

50. An energy storage device, comprising: The energy storage device comprises the battery device of any one of claims 1 to 48, the battery device is configured to store electrical energy and provide electrical energy.

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