Battery device and electric appliance

Abstract

The present disclosure relates to a battery device and an electric appliance, the battery device can comprise a multi-layer battery pack and a support, the multi-layer battery pack can be arranged in a stacked manner along a first direction, and at least one support is connected to each layer of the battery pack, and an outlet for medium discharge is arranged on one side of the support facing the battery pack to fill at least part of the gap between the support and the battery pack with the medium. Based on this, the battery device of the present disclosure can enable the medium to fill the gap in at least part of the battery pack and the support while ensuring the stability and strength of the connection between at least two layers of the battery pack, and can effectively constrain the battery pack, thereby ensuring the overall sealing and safety of the battery device.

Description

Technical Field

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

[0002] In related technologies, the restraint effect of battery packs in battery devices with multi-layer battery packs still needs to be improved. Utility Model Content

[0003] The purpose of this disclosure is to provide a battery device and an electrical appliance that can at least improve the restraint effect on the battery pack, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a battery device including a multi-layer battery pack and a support member, the multi-layer battery pack being stacked along a first direction, each layer of the battery pack being connected to at least one of the support members, and the support member having an outlet for discharging a medium on one side facing the battery pack, so as to fill at least a portion of the gap between the support member and the battery pack with the medium.

[0005] Optionally, the support has a flow channel communicating with the outlet and an inlet communicating with the flow channel, the inlet being used to allow a medium to enter the flow channel.

[0006] Optionally, the support member has a connecting surface opposite to the battery pack and a top surface adjacent to the connecting surface, the outlet is disposed on the connecting surface, and the inlet is disposed on the top surface.

[0007] Optionally, the support includes a baffle and a flow channel component disposed on the baffle, wherein the inlet, the flow channel, and the outlet are all disposed on the flow channel component.

[0008] Optionally, the baffle includes a mounting groove, and the flow channel is connected to the mounting groove.

[0009] Optionally, the number of inlets is multiple and they are spaced apart along the extension direction of the support; and / or, the number of outlets is multiple and they are spaced apart along the extension direction of the support; and / or, one of the inlets is connected to at least one of the outlets.

[0010] Optionally, the battery pack includes a plurality of battery cells arranged along a second direction, each battery cell having two first sidewalls facing away from each other along the second direction, the support member being arranged adjacent to at least one of the battery cells in the second direction, the support member having a connecting surface opposite to the first sidewall of the adjacent battery cell, the outlet being disposed on the connecting surface, and the second direction intersecting the first direction.

[0011] Optionally, the battery cell has two second sidewalls facing away from each other along the first direction, and the area of ​​the first sidewall is larger than the area of ​​the second sidewall.

[0012] Optionally, the plurality of battery cells are provided with the support members on opposite sides along the second direction.

[0013] Optionally, the plurality of battery cells are separated into at least two groups of battery cells arranged at intervals along the second direction by at least one of the support members.

[0014] Optionally, the support member located between two adjacent battery cell groups is provided with outlets on both opposite sides in the second direction.

[0015] Optionally, a stop structure is provided between the support member and the battery pack, the stop structure, the support member and the battery pack enclose a filling space, and the outlet communicates with the filling space to fill at least a portion of the filling space through the medium.

[0016] Optionally, the stop structure includes an upward-opening U-shaped structure, and the filling space is located inside the U-shape of the U-shaped structure.

[0017] Optionally, the stop structure includes foam.

[0018] Optionally, the medium includes a colloid.

[0019] Optionally, the two support members positioned opposite each other in the first direction can be detachably connected or integrally formed.

[0020] Optionally, a partition is provided between two adjacent battery packs in the first direction; and / or, a tray is provided on a first side of the multi-layer battery pack along the first direction; and / or, a top plate is provided on a second side of the multi-layer battery pack along the first direction.

[0021] Optionally, the support member is connected to an adjacent tray and a partition; and / or, the support member is connected to two adjacent partitions; and / or, the support member is connected to an adjacent top plate and a partition.

[0022] Optionally, two adjacent support members along the first direction and the partition between the two support members are connected by a connecting structure.

[0023] Optionally, the connection structure includes a first connector and / or positioning member that passes through the two adjacent supports and the partition between the two supports.

[0024] Optionally, at least one of the partition, the tray, and the top plate is provided with a flange structure that bends toward at least one adjacent support member, the flange structure being connected to the support member.

[0025] Optionally, the flange structure and the opposite support member are connected by a second connector.

[0026] Optionally, at least one of the partition, the tray, and the top plate includes a heat exchange plate.

[0027] Optionally, a first thermally conductive structural layer is provided between the partition and at least one adjacent battery pack; and / or, a second thermally conductive structural layer is provided between the top plate and the adjacent battery pack; and / or, a third thermally conductive structural layer is provided between the tray and the adjacent battery pack.

[0028] Optionally, a first heating layer is provided between the partition and at least one adjacent battery pack; and / or, a second heating layer is provided between the top plate and the adjacent battery pack; and / or, a third heating layer is provided between the tray and the adjacent battery pack.

[0029] Optionally, at least one of the support members has a mounting portion on its outer wall surface opposite to the battery pack, the mounting portion being used to mount an accessory of the battery device.

[0030] Optionally, the battery device further includes a sealing cover and a tray, the sealing cover and the tray forming a receiving cavity, and the multilayer battery pack is disposed within the receiving cavity.

[0031] A second aspect of this disclosure provides an electrical device including the aforementioned battery device.

[0032] Through the above technical solution, the support member and the battery pack of this disclosure are arranged adjacent to each other. This allows the medium to flow out from the outlet of the support member and fill at least part of the gap between the support member and the battery pack. In this way, under the combined action of the support member and the medium filling the gap, the battery pack can be effectively restrained to reduce or even avoid the impact of the expansion force generated by the battery cells in the battery pack on the battery device. In addition, each layer of battery pack is connected to at least one support member, which can effectively restrain the multi-layer battery pack, thereby improving the safety of the battery device.

[0033] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0034] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of one embodiment of the battery device provided in this disclosure; Figure 2 This is a structural diagram of one embodiment of the support component provided in this disclosure; Figure 3 This is a structural diagram of another embodiment of the support provided in this disclosure; Figure 4 This is a cross-sectional view of the flow channel component provided in the embodiments of this disclosure; Figure 5 This is a schematic diagram of the structure after the partition, top plate and support members are connected according to the embodiments of this disclosure; Figure 6 This is an exploded view of the battery pack and support provided in the embodiments of this disclosure; Figure 7 This is a front view of the battery pack and support provided in the embodiments of this disclosure; Figure 8 This is a schematic diagram showing the connection of two support members provided in an embodiment of this disclosure; Figure 9 This is an exploded view of one embodiment of the battery device provided in this disclosure; Figure 10 This is a schematic diagram of another embodiment of the battery device provided in this disclosure.

[0035] Explanation of reference numerals in the attached figures 1-Battery pack; 110-Battery cell; 111-First side wall; 112-Second side wall; 120-Battery cell pack; 2-Supporting component; 21-Baffle; 22-Flow channel component; 221-Outlet; 222-Flow channel; 223-Inlet; 23-Connecting surface; 24-Top surface; 25-Mounting groove; 3-Stop structure; 4-Baffle; 5-Tray; 6-Top plate; 7-Second connecting component; 8-Heat exchange plate; 101-First side; 102-Second side; 200-Filling space; 300-Connecting structure; 310-First connecting component; 320-Positioning component; 400-Flanged structure; 500-First thermally conductive structural layer; 600-Second thermally conductive structural layer; 800-Mounting part; 900-Sealing cover; A-First direction; B-Second direction. Detailed Implementation

[0036] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0037] In this disclosure, unless otherwise stated, directional terms such as "up" and "down" generally refer to the relative "up" and "down" in the direction of gravity when the corresponding components are in use. For details, please refer to [reference needed]. Figure 1 , Figure 9 and Figure 10 In the drawings shown, "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself; "first direction" is the height direction of the battery device during normal use; "second direction" is the length or width direction of the battery device during normal use, and the "second direction" intersects with the "first direction". Furthermore, the terms "first," "second," "third," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In addition, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0038] The battery device in the exemplary embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0039] refer to Figures 1 to 10 As shown, in a first aspect of this disclosure, a battery device is provided, which may include a multi-layer battery pack 1 and a support member 2. The multi-layer battery pack 1 may be stacked along a first direction A. Each layer of battery pack 1 is connected to at least one support member 2. The support member 2 is provided with an outlet 221 for medium discharge on the side facing the battery pack 1, so as to fill at least a portion of the gap between the support member 2 and the battery pack 1 with a medium.

[0040] The battery device has multiple battery packs 1, which can provide the battery device with greater voltage and power, thereby enabling the battery device to meet scenarios such as the high voltage platform of the whole vehicle. However, when the battery pack 1 experiences thermal runaway, it will generate expansion force. If the expansion force cannot be effectively limited, it may damage the battery device or even cause the battery device to catch fire, thereby reducing the safety of the battery device. The support member 2 of this disclosure is provided with an outlet 221, through which the medium can be filled into the gap between the battery pack 1 and the support member 2. In this way, under the combined action of the support member 2 and the medium, the battery device of this disclosure can limit the expansion of the battery pack 1 on at least one side of the battery pack 1, thereby effectively limiting the expansion force generated by the battery pack 1 to a certain extent, forming an effective restraint on the battery pack 1, thereby reducing or even avoiding the impact of the expansion force generated by the battery cells 110 in the battery pack 1 on the battery device. In addition, each layer of battery pack 1 is connected to at least one support member 2, which can achieve effective restraint on the multiple battery packs 1 and improve the safety of the battery device.

[0041] In addition, the medium filled between the battery pack 1 and the support member 2 can also ensure the sealing between the battery pack 1 and the support member 2 to a certain extent.

[0042] In addition, the support member 2 can also be used to connect at least two battery packs 1, so as to reduce the connection structure between the multi-layer battery packs 1 while ensuring the stability and structural strength of the connection between the multi-layer battery packs 1.

[0043] Based on this, the battery device disclosed herein can ensure the stability and strength of the connection between at least two battery packs 1, while enabling the medium to fill at least part of the gaps in the battery packs 1 and the support member 2, and to effectively constrain the battery packs 1, thereby ensuring the overall sealing and safety of the battery device.

[0044] In addition, it should be noted that the battery device can be a battery pack or a vehicle battery chassis (CTC), etc.

[0045] In embodiments of this disclosure, such as Figures 2 to 4 As shown, the support member 2 may have a flow channel 222 communicating with an outlet 221 and an inlet 223 communicating with the flow channel 222. The inlet 223 is used to allow media to enter the flow channel 222. The media can be poured in from the inlet 223 and then flow out from the outlet 221 through the flow channel 222 into the gap between the support member 2 and the battery pack 1 to fill at least part of the gap. The arrangement of the flow channel 222 allows the inlet 223 and the outlet 221 to have multiple mounting positions on the support member 2, thereby increasing the flexibility of the inlet 223 and outlet 221 arrangement. For example, the inlet 223 can be located in a position where it is easy to pour in the media, and the outlet 221 can be located near the central region of the gap between the support member 2 and the battery pack 1, so that the media can flow relatively evenly into the various regions of the gap.

[0046] For example, such as Figures 2 to 4 As shown, the support member 2 may have a connecting surface 23 opposite to the battery pack 1 and a top surface 24 adjacent to the connecting surface 23. An outlet 221 is disposed on the connecting surface 23, and an inlet 223 is disposed on the top surface 24. The inlet 223 being located on the top surface 24 facilitates the filling of the medium into the flow channel 222. The medium entering the flow channel 222 can flow under the influence of gravity and gradually flow to the outlet 221, then flow out from the outlet 221 located on the connecting surface 23, thus allowing the medium to fill the gap between the support member 2 and the battery pack 1. This can, to a certain extent, prevent the medium from clogging the flow channel 222.

[0047] The cross-section of the flow channel 222 can be L-shaped, with one end corresponding to the inlet 223 and the other end corresponding to the outlet 221.

[0048] Alternatively, in some embodiments not shown, the cross-section of the flow channel 222 is inclined from the end of the flow channel 222 corresponding to the inlet 223 to the end of the flow channel 222 corresponding to the outlet 221. In this way, after the medium enters the flow channel 222 from the inlet 223, it will flow directly to the outlet 221 under the action of gravity and flow out from the outlet 221, thereby improving the filling efficiency of the medium.

[0049] In some possible implementations, such as Figures 2 to 4 As shown, the support member 2 may include a baffle 21 and a flow channel member 22 disposed on the baffle 21. The inlet 223, the flow channel 222, and the outlet 221 are all disposed on the flow channel member 22. That is, the flow channel member 22 and the baffle 21 are two independently disposed components. The baffle 21 can serve as the main body of the support member 2, while the flow channel member 22 serves as the area on the support member 2 for medium flow. In this way, if the flow channel member 22 experiences problems such as medium blockage, the flow channel member 22 can be removed and replaced without changing the connection relationship between the baffle 21 and other components, thereby improving the disassembly and assembly efficiency of the flow channel member 22. In addition, the baffle 21 and the flow channel member 22 are disposed separately, which simplifies the internal structure of the baffle 21 and facilitates the molding of the baffle 21. The baffle 21 can be molded by aluminum extrusion.

[0050] In addition, such as Figures 2 to 4 As shown, the baffle 21 may include a mounting groove 25, and the flow channel component 22 is connected to the mounting groove 25. The mounting groove 25 may extend from the side of the baffle 21 toward the battery pack 1 into the interior of the baffle 21. The mounting groove 25 may be integrally formed with the baffle 21, or the mounting groove 25 may be formed by post-processing of the baffle 21. For example, the mounting groove 25 may be formed by machining part of the baffle 21. This forming method also allows for more flexible placement of the flow channel component 22. Workers can process the corresponding position of the baffle 21 as needed to form the mounting groove 25. Subsequently, the flow channel component 22 can be connected to the mounting groove 25 by means of welding, thereby ensuring the stability of the connection between the flow channel component 22 and the mounting groove 25.

[0051] In embodiments of this disclosure, the quantities of inlet 223 and outlet 221, as well as their arrangement, can be adaptively adjusted as needed. For example, such as... Figures 2 to 4 As shown, the number of inlets 223 can be multiple and they are arranged at intervals along the extension direction of the support member 2. This can increase the amount of medium that can flow through the support member 2 and enable the medium to quickly fill the flow channel 222 and flow out from the outlet 221 to quickly fill the gap between the support member 2 and the battery pack 1. At this time, the number of outlets 221 can be one, and in order to ensure that the medium in the flow channel 222 can flow out in time, the diameter of the outlet 221 can be large.

[0052] Alternatively, there can be multiple outlets 221, which are spaced apart along the extension direction of the support member 2. Multiple outlets 221 arranged spaced apart along the extension direction of the support member 2 can ensure that the medium can be discharged from the flow channel 222 in a timely manner when the flow rate of the medium is large. On the other hand, it can also make the medium flowing out of the outlet 221 flow more evenly in the gap between the support member 2 and the battery pack 1, avoiding the situation where local medium accumulation occurs, which affects the sealing and restraint effect.

[0053] One inlet 223 can be connected to at least one outlet 221, that is, outlet 221 and inlet 223 can be set in a one-to-one correspondence. One inlet 223 can also be set in a correspondence with multiple outlets 221, as long as it can make the medium fill at least part of the gap between the support member 2 and the battery pack 1 after passing through the inlet 223, the flow channel 222 and the outlet 221 in sequence.

[0054] In some possible implementations, such as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, the battery pack 1 may include a plurality of battery cells 110 arranged along a second direction B. Each battery cell 110 has two first sidewalls 111 facing away from each other along the second direction B. A support member 2 is arranged adjacent to at least one battery cell 110 in the second direction B. The support member 2 has a connecting surface 23 opposite to the first sidewall 111 of the adjacent battery cell 110, and an outlet 221 is provided on the connecting surface 23. When the battery pack 1 experiences thermal runaway and generates expansion force, the first sidewall 111 of the battery cell 110 near the support member 2 can directly or indirectly contact the connecting surface 23 through a medium. In this way, the support member 2 and the medium located in the gap between the support member 2 and the battery pack 1 will limit the expansion force generated by the battery pack 1 to a certain extent, thereby reducing or even avoiding the possibility of the expansion force damaging the battery pack 1. In addition, the support member 2 and the battery cell 110 adopt a surface-to-surface contact method, which can also ensure the contact area between the two, thereby ensuring the limiting effect of the support member 2 on the expansion force of the battery pack 1.

[0055] In addition, such as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10As shown, the battery cell 110 may also have two second sidewalls 112 facing away from each other along the first direction A, with the area of ​​the first sidewall 111 being larger than the area of ​​the second sidewall 112. That is, the large surface of the battery cell 110 and the support member 2 are arranged opposite to each other. Thus, when the battery cell 110 expands due to thermal runaway, its large surface will directly or indirectly come into contact with the connection surface 23 of the support member 2. This can further increase the contact area between the two and improve the limiting effect of the support member 2 on the expansion force of the battery pack 1.

[0056] In embodiments of this disclosure, such as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, the support member 2 can be set at different positions in the multiple battery cells 110 as needed. For example, the multiple battery cells 110 can be provided with support members 2 on both sides of the opposite side along the second direction B. In this way, when the battery cell 110 generates expansion force due to thermal runaway, the support member 2 and the medium filled in the gap can simultaneously restrict the expansion of the battery pack 1 from both sides, thereby improving the restriction effect on the expansion of the battery pack 1 and improving the safety of the battery device.

[0057] In addition, such as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, multiple battery cells 110 can also be separated into at least two battery cell groups 120 arranged at intervals along the second direction B by at least one support member 2. That is, the support member 2 can also be provided between multiple battery cells 110 to separate some of the battery cells 110. When the battery cells 110 on both sides expand, the support member 2 and the medium filled between the support member 2 and the battery group 1 can limit the expansion of the battery cells 110 on both sides to a certain extent.

[0058] Furthermore, when the support member 2 is located between multiple battery cells 110, the support member 2 located between two adjacent battery cell groups 120 is provided with outlets 221 on both opposite sides in the second direction B, so that the medium can flow out from both sides of the support member 2 and fill at least part of the gap between the support member 2 and the battery cells 110 located on both sides thereon. The number of outlets 221 and inlets 223 can be adaptively adjusted as needed. For example, multiple outlets 221 and inlets 223 can be provided, and multiple inlets 223 and multiple outlets 221 can be spaced apart along the extension direction of the support member 2. The inlets 223 and outlets 221 can be provided one-to-one, and the number of outlets 221 on each connecting surface 23 can be similar or the same, so as to ensure the flow rate of the medium through the support member 2 while making the medium fill the space between the support member 2 and the battery cells 110 relatively evenly.

[0059] Furthermore, by way of example, the same layer of battery pack 1 may have three support members 2. Two of the three support members 2 may be disposed on opposite sides of the battery pack 1 in the second direction B. The two support members 2 form a connection surface 23 on the side of the battery cell 110 closer to the battery cell 110. The remaining support member 2 can separate the multiple battery cells 110 into two battery cell groups 120. The support member 2 forms a connection surface 23 on the opposite sides of the second direction B. The medium can flow into the gap between the battery cell 110 and the support member 2 through the outlet 221 of the three support members 2. This improves the sealing between the battery pack 1 and the support member 2. When the battery pack 1 expands due to thermal runaway, the three support members 2 can simultaneously limit the expansion force generated by the battery pack 1, thereby improving the limiting effect on the expansion force generated by the battery pack 1 and ensuring the safety of the battery device.

[0060] It should be noted that the arrangement of the mounting groove 25 on the baffle 21 can be adapted according to the different positions of the support member 2. For example, when the support member 2 is located on opposite sides of the battery pack 1 in the second direction B, the mounting groove 25 can extend a portion of its area from the connecting surface 23 into the interior of the baffle 21, so that the flow channel member 22 can be flush with the connecting surface 23 on the side after being connected to the mounting groove 25, and the outlet 221 of the flow channel member 22 can be set on this side. The top surface of the mounting groove 25 can be flush with the top surface of the baffle 21, and the inlet 223 of the flow channel member 22 can be set on this top surface.

[0061] Alternatively, when the support member 2 is located in the middle of the battery pack 1, that is, battery cells 110 are provided on both sides of the support member 2, the mounting groove 25 can extend from the connecting surface 23 to the inside of the baffle 21 until it penetrates the opposite sides of the baffle 21 in the second direction B. At this time, the support member 2 will have a notch, which forms the mounting groove 25. In this way, after the flow channel member 22 and the mounting groove 25 are connected, the two sides of the flow channel member 22 that are opposite to each other in the first direction A can be flush with the two sides of the baffle 21 that are opposite to each other in the first direction A and have outlets 221. The top surface of the flow channel member 22 can be flush with the top surface of the baffle 21, and the inlet 223 of the flow channel member 22 can be provided on the top surface. There can be two inlets 223, and the two inlets 223 can be respectively corresponding to the two outlets 221. In this way, the medium can flow towards both sides of the support member 2 to fill the gap between the support member 2 and the battery cells 110.

[0062] In some possible implementations, such as Figure 2 and Figure 3 As shown, a stop structure 3 is provided between the support member 2 and the battery pack 1. The stop structure 3, the support member 2, and the battery pack 1 enclose a filling space 200. The outlet 221 communicates with the filling space 200 to fill at least part of the filling space 200 with a medium. The filling space 200 enclosed by the support member 2, the battery pack 1, and the stop structure 3 allows the medium to flow within the filling space 200 as much as possible after flowing out of the outlet 221. The stop structure 3 can, to a certain extent, prevent overflow from the filling space 200, thereby improving the filling efficiency of the medium.

[0063] Among them, such as Figure 2 and Figure 3 As shown, the stop structure 3 may include an upward-opening U-shaped structure, with the filling space 200 located inside the U-shape. The U-shaped stop structure 3 can be adapted to the support member 2 and part of the side structure of the battery cell 110. Thus, the stop structure 3 can be attached to the bottom edge of the support member 2 and the battery cell 110, so that the medium fills the filling space 200 after flowing out from the outlet 221, preventing the medium from overflowing from the filling space 200.

[0064] Among them, such as Figure 2 and Figure 3As shown, the stop structure 3 may include foam. The foam itself has a certain compression resilience. Using foam as the stop structure 3 can provide a certain buffering and protection effect for the battery cell 110 while ensuring the sealing between the support 2 and the battery cell 110. For example, when the battery cell 110 experiences thermal runaway, the foam can absorb the vibration, impact and mechanical stress generated by the battery cell 110, thereby improving the safety and service life of the battery cell 110.

[0065] In addition, the medium filled between the support member 2 and the battery pack 1 can be a colloid. The colloid has good fluidity, which allows it to fully fill the gap between the support member 2 and the battery pack 1 after flowing out from the outlet 221. After curing, it can ensure the sealing between the support member 2 and the battery pack 1 and form an effective restraint on the battery pack 1 with the support member 2. It can also protect the battery cell 110. In addition, the colloid has good thermal conductivity, which can conduct away the heat generated by the battery cell 110, thereby enabling the battery cell 110 to work normally.

[0066] Furthermore, this disclosure uses a method in which the stop structure 3 and the medium jointly fill the gap between the battery cell 110 and the support member 2, eliminating the need for a honeycomb panel and saving costs.

[0067] In the embodiments of this disclosure, two support members 2 positioned opposite each other in the first direction A are detachably connected or integrally formed. If the support members 2 in each layer of battery pack 1 are detachably connected, it is convenient to replace the support members 2 in the battery device; if the support members 2 are integrally formed, the integrity of the components in the battery device can be guaranteed to a certain extent, thereby improving the overall strength of the battery device.

[0068] In some possible implementations, such as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, a separator 4 is provided between two adjacent battery packs 1 in the first direction A; and / or, a tray 5 is provided on the first side 101 of the multi-layer battery pack 1 along the first direction A; and / or, a top plate 6 is provided on the second side 102 of the multi-layer battery pack 1 along the first direction A. That is, the two sides of the battery cell 110 in the first direction A can be connected to one of the separator 4, the tray 5, and the top plate 6. In this way, when the battery cell 110 experiences thermal runaway, the support member 2 can limit the expansion force generated by the battery cell 110 in the second direction B, and the separator 4, the tray 5, and the top plate 6 can limit the expansion force generated by the battery cell 110 in the first direction A. Thus, the expansion force generated by the battery cell 110 is effectively limited, thereby improving the safety and service life of the battery cell 110.

[0069] Furthermore, this arrangement is not limited to two or three layers of battery pack 1. Even if the battery device can have more layers of battery pack 1, the battery device can effectively support these battery pack 1 and limit the expansion of the individual battery cells 110 in the battery pack 1.

[0070] The support members 2 on different layers of the battery pack 1 can be connected to different structures. Taking a battery device with three layers of battery pack 1 as an example, Figure 10 As shown, the bottom of the bottom battery pack 1 can be placed on the tray 5, and a partition 4 can be placed on its top. Thus, the support member 2 of the bottom battery pack 1 can be connected to the adjacent tray 5 and partition 4. The bottom of the middle battery pack 1 is the partition 4 at the top of the bottom battery pack 1, and another partition 4 can be placed on its top. Thus, the support member 2 of the middle battery pack 1 can be connected to the two adjacent partitions 4. The bottom of the top battery pack 1 is the partition 4 at the top of the middle battery pack 1, and a top plate 6 is placed on its top. Thus, the support member 2 of the top battery pack 1 can be connected to the adjacent top plate 6 and partition 4.

[0071] As can be seen, the support member 2 disclosed herein can be connected to the tray 5, the top plate 6 and the partition 4, thereby ensuring the applicability of the support member 2 and improving the flexibility when setting up different layers of battery packs 1 in the battery device.

[0072] In addition, such as Figure 8 As shown, two adjacent support members 2 along the first direction A and the partition 4 between the two support members 2 can be connected by a connecting structure 300. Connecting the two support members 2 via the connecting structure 300 ensures the connection strength of the two support members 2 while facilitating their inspection and replacement, thereby improving the efficiency of disassembly and assembly of the support members 2 in the battery device. Furthermore, this also connects the partition 4 and the support members 2 together, improving the overall integrity and stability of the battery device.

[0073] Among them, such as Figure 8 As shown, the connection structure 300 may include a first connector 310 and / or a positioning member 320 that pass through two adjacent support members 2 and a partition 4 between the two support members 2. Exemplarily, the first connector 310 may be configured as a bolt, and the positioning member 320 may be configured as a positioning pin. The surfaces of the two support members 2 in the first direction A may have corresponding connection holes, through which the bolt can pass to connect the two support members 2 together. Furthermore, the surfaces of the two support members 2 in the first direction A may have positioning holes, and the positioning member 320 may be disposed in the positioning hole of one support member 2 to cooperate with the positioning hole on the other support member 2, thereby improving the connection efficiency and accuracy.

[0074] In some embodiments of the present disclosure, as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 shown, at least one of the partition plate 4, the tray 5 and the top plate 6 is provided with a flanging structure 400 bent towards at least one adjacent support member 2, and the flanging structure 400 is connected to the support member 2. The flanging structure 400 can abut and be connected to the two side edges of the support member 2 that are背离 in the first direction A, so as to limit the movement of the support member 2 in the first direction A to a certain extent, ensure the stability of the support member 2, and be able to jointly limit the expansion of the battery cell 110 with the support member 2 when the battery cell 110 thermally runs away.

[0075] Among them, in the same layer of the battery pack 1, taking the battery pack 1 in the middle layer of the three-layer battery pack 1 as an example, support members 2 can be provided on both sides and in the middle of the battery pack 1. The upper and lower ends of the battery pack 1 have partition plates 4. Among them, the flanging structure 400 of the partition plate 4 located at the upper end of the battery pack 1 can be bent downward, and the flanging structure 400 of the partition plate 4 located at the lower end of the battery pack 1 can be bent upward. In this way, the support member 2 and the partition plate 4 can form a constraint similar to a "day" character shape for the battery pack 1, that is, the support member 2 and the flanging structure 400 can achieve the constraint of the battery cell 110 in the second direction B, and the two partition plates 4 can achieve the constraint of the battery cell 110 in the first direction A. Thus, the constraint effect on the expansion of the battery cell 110 is ensured, and the service life and safety of the battery device are improved.

[0076] Among them, in order to ensure the stability of the connection between the flanging structure 400 and the support member 2, the flanging structure 400 and the opposite support member 2 can be connected by a second connecting member 7. Among them, the second connecting member 7 can be configured as a rivet, or can also be configured as a fastener such as a screw or a bolt.

[0077] In some possible embodiments, as Figure 1 , Figure 6 , Figure 7 , Figure 9 and Figure 10 shown, at least one of the partition plate 4, the tray 5 and the top plate 6 includes a heat exchange plate 8. The heat exchange plate 8 can be connected to the top and / or bottom of the battery pack 1 to perform heat exchange with the battery cell 110. Thus, it is ensured that the temperature of the battery cell 110 can be maintained within the normal working temperature, so as to ensure the normal use of the battery device. Exemplarily, the heat exchange plate 8 can be configured as a cold plate.

[0078] Among them, as Figure 1 and Figure 9As shown, a first thermally conductive structural layer 500 may be provided between the separator 4 and at least one adjacent battery pack 1; and / or, a second thermally conductive structural layer 600 may be provided between the top plate 6 and the adjacent battery pack 1; and / or, a third thermally conductive structural layer may be provided between the tray 5 and the adjacent battery pack 1. That is, the battery pack 1 can be connected to the separator 4, the top plate 6, and the tray 5 through thermally conductive structural layers. The first thermally conductive structural layer 500, the second thermally conductive structural layer 600, and the third thermally conductive structural layer may be configured as thermally conductive adhesive. This facilitates the connection between the battery pack 1 and the separator 4, the top plate 6, and the tray 5 while improving the heat exchange efficiency of the battery pack 1 and ensuring the normal operation of the battery device.

[0079] In addition, such as Figure 9 As shown, a first heating layer (not shown) may be provided between the separator 4 and at least one adjacent battery pack 1; and / or, a second heating layer may be provided between the top plate 6 and the adjacent battery pack 1; and / or, a third heating layer may be provided between the tray 5 and the adjacent battery pack 1. The heating layers allow the battery cells 110 to be heated when the battery device is in a low-temperature environment, thereby enabling the battery cells 110 to operate within their normal operating temperature range, thus improving the performance and lifespan of the battery pack 1. The first, second, and third heating layers may be configured as heating films.

[0080] In addition, such as Figure 5 As shown, at least one support member 2 has a mounting portion 800 on its outer wall surface facing away from the battery pack 1. The mounting portion 800 is used to mount accessories for the battery device. Exemplarily, the mounting portion 800 can be configured as a connector hole and a mounting position hole, thereby facilitating the installation of structures such as high-voltage copper busbar locking nut fixing brackets, NTC sampling harness clips, copper busbar fixing brackets, high-voltage connector harness fixing clips, and PTC connector harness fixing clips, thereby achieving efficient arrangement of high and low voltage harnesses.

[0081] In embodiments of this disclosure, such as Figure 9 As shown, the battery device may also include a sealing cover 900 and a tray 5, which together form a receiving cavity, in which the multi-layer battery pack 1 is disposed. The receiving cavity reduces the impact of external forces on the battery pack 1 and reduces or even prevents external impurities from entering the battery pack 1, thereby improving the protection of the multi-layer battery pack 1, enabling the battery device to operate normally and extending its service life.

[0082] A second aspect of this disclosure provides an electrical device including the aforementioned battery device. Furthermore, it should be noted that this electrical device possesses all the beneficial effects of the aforementioned battery device, which will not be elaborated upon here.

[0083] The electrical equipment can be a vehicle, electrical appliances, or energy storage equipment, etc.

[0084] In summary, this disclosure exemplarily demonstrates the beneficial effects of a battery device.

[0085] The battery device can have multiple battery packs 1, and each battery pack 1 can be provided with support members 2 on both sides and in the middle. The support members 2 of two adjacent battery packs 1 can be detachably connected together, thereby ensuring the structural strength of the battery device to a certain extent.

[0086] In addition, the colloid can enter the flow channel 222 through the inlet 223 on the support member 2, and flow out from the outlet 221 through the flow channel 222, thereby flowing into the gap between the battery cell 110 and the support member 2. A stop structure 3 can also be provided in the gap to prevent the colloid from overflowing from the gap. In this way, the colloid can fill the gap and improve the overall sealing of the battery device.

[0087] Furthermore, when the battery cell 110 generates expansion force due to thermal runaway, the support member 2 on each layer of battery pack 1 can restrict the expansion of the battery cell 110 corresponding to the support member 2 in the second direction B. The separator 4, tray 5 and top plate 6 can restrict the expansion of the battery cell 110 in the first direction A, so as to reduce or even avoid the impact of the expansion force generated by the battery cell 110 in the battery pack 1 on the battery device, thereby improving the safety of the battery device.

[0088] Based on this, the battery device disclosed herein can ensure the stability and strength of the connection between two adjacent battery packs 1, while enabling the medium to fill at least part of the gaps in the battery packs 1 and the support member 2, and to effectively constrain the battery packs 1, thereby ensuring the overall sealing and safety of the battery device.

[0089] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0090] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0091] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A battery device, characterized in that, The device includes a multi-layer battery pack and a support member. The multi-layer battery pack is stacked along a first direction. Each layer of the battery pack is connected to at least one of the support members. The support member has an outlet for medium discharge on the side facing the battery pack, so as to fill at least a portion of the gap between the support member and the battery pack with the medium.

2. The battery device according to claim 1, characterized in that, The support has a flow channel communicating with the outlet and an inlet communicating with the flow channel, the inlet being used to allow a medium to enter the flow channel.

3. The battery device according to claim 2, characterized in that, The support member has a connecting surface opposite to the battery pack and a top surface adjacent to the connecting surface, the outlet is disposed on the connecting surface, and the inlet is disposed on the top surface.

4. The battery device according to claim 2, characterized in that, The support includes a baffle and a flow channel component disposed on the baffle, wherein the inlet, the flow channel, and the outlet are all disposed on the flow channel component.

5. The battery device according to claim 4, characterized in that, The baffle includes a mounting groove, and the flow channel is connected to the mounting groove.

6. The battery device according to claim 2, characterized in that, The number of inlets is multiple and they are spaced apart along the extension direction of the support member; and / or, The number of outlets is multiple and they are spaced apart along the extension direction of the support; and / or, One of the inlets is connected to at least one of the outlets.

7. The battery device according to any one of claims 1-6, characterized in that, The battery pack includes a plurality of battery cells arranged along a second direction. Each battery cell has two first sidewalls facing away from each other along the second direction. A support member is arranged adjacent to at least one of the battery cells in the second direction. The support member has a connecting surface opposite to the first sidewall of the adjacent battery cell. The outlet is disposed on the connecting surface. The second direction intersects the first direction.

8. The battery device according to claim 7, characterized in that, The battery cell has two second sidewalls facing away from each other along the first direction, and the area of ​​the first sidewall is larger than the area of ​​the second sidewall.

9. The battery device according to claim 7, characterized in that, The plurality of battery cells are provided with the support members on opposite sides along the second direction.

10. The battery device according to claim 7, characterized in that, The plurality of battery cells are separated into at least two groups of battery cells arranged at intervals along the second direction by at least one of the support members.

11. The battery device according to claim 10, characterized in that, The support member located between two adjacent battery cell groups has outlets on both opposite sides in the second direction.

12. The battery device according to any one of claims 1-6, characterized in that, A stop structure is provided between the support member and the battery pack. The stop structure, the support member, and the battery pack form a filling space. The outlet communicates with the filling space to fill at least a portion of the filling space through the medium.

13. The battery device according to claim 12, characterized in that, The stop structure includes an upward-opening U-shaped structure, and the filling space is located inside the U-shape of the U-shaped structure.

14. The battery device according to claim 12, characterized in that, The stop structure includes foam.

15. The battery device according to any one of claims 1-6, characterized in that, The medium includes colloids.

16. The battery device according to any one of claims 1-6, characterized in that, The two support members positioned opposite each other in the first direction can be detachably connected or integrally formed.

17. The battery device according to any one of claims 1-6, characterized in that, A partition is provided between two adjacent battery pack layers in the first direction; and / or, The multi-layer battery pack is provided with a tray on a first side along the first direction; and / or The multi-layer battery pack has a top plate on the second side along the first direction.

18. The battery device according to claim 17, characterized in that, The support member is connected to the adjacent tray and the partition; and / or, The support member is connected to two adjacent partitions, and / or The support member is connected to the adjacent top plate and the partition.

19. The battery device according to claim 17, characterized in that, The two adjacent support members along the first direction and the partition between the two support members are connected by a connecting structure.

20. The battery device according to claim 19, characterized in that, The connection structure includes a first connector and / or positioning member that passes through the two adjacent support members and the partition between the two support members.

21. The battery device according to claim 18, characterized in that, At least one of the partition, the tray, and the top plate is provided with a flange structure that bends toward at least one adjacent support member, and the flange structure is connected to the support member.

22. The battery device according to claim 21, characterized in that, The flange structure and the opposite support member are connected by a second connector.

23. The battery device according to claim 18, characterized in that, At least one of the partition, the tray, and the top plate includes a heat exchange plate.

24. The battery device according to claim 18, characterized in that, A first thermally conductive structural layer is provided between the separator and at least one adjacent layer of the battery pack; and / or, A second thermally conductive structural layer is provided between the top plate and the adjacent battery pack; and / or, A third thermally conductive structural layer is provided between the tray and the adjacent battery pack.

25. The battery device according to claim 18, characterized in that, A first heating layer is provided between the separator and at least one adjacent layer of the battery pack; and / or, A second heating layer is provided between the top plate and the adjacent battery pack; and / or, A third heating layer is provided between the tray and the adjacent battery pack.

26. The battery device according to any one of claims 1-6, characterized in that, At least one of the support members has a mounting portion on its outer wall surface facing away from the battery pack, the mounting portion being used to mount an accessory of the battery device.

27. The battery device according to any one of claims 1-6, characterized in that, The battery device also includes a sealing cover and a tray, the sealing cover and the tray forming a receiving cavity, and the multi-layer battery pack is disposed in the receiving cavity.

28. An electrical appliance, characterized in that, The battery device includes any one of claims 1-27.

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