Battery case, battery having same and electrical device

Abstract

A battery case, a battery having same and an electrical device. The battery case (10) comprises a case (1), a deformable sealing member (2) and a controller; the case (1) comprises a case body (11) and a case cover (12), the case cover (12) being used for sealing an opening of the case body (11); the sealing member (2) is arranged between the case body (11) and the case cover (12), and is used for sealing an assembly gap between the case body (11) and the case cover (12), the sealing member (2) being internally provided with an accommodation channel (21) extending in the length direction thereof, and the accommodation channel (21) being used for accommodating a medium, such as gas or liquid; the controller is used for controlling the filling amount of the medium in the accommodation channel (21). The sealing member (2) of the battery case (10) has adjustable volume expansibility, thus achieving good sealing effect and high flexibility.

Description

Battery boxes and batteries and electrical equipment containing them.

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202420897543.7, filed on April 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of electronic battery technology, specifically to a battery box and a battery and electrical device having the same. Background Technology

[0004] With the continuous advancement of batteries, they are increasingly being applied to various aspects of daily life. The sealing performance of a battery has a significant impact on its performance. In some related technologies, the sealing structure consists of a tray, a sealing cap, and a glue tank. First, the tray is fixed to a dedicated workbench. Then, a glue applicator is used to evenly apply sealant along the glue tank on the tray. Next, the sealing cap is placed on the tray, with the lower surface of its sealing edge aligned and pressed tightly against the sealing surface of the tray's sealing seat. This ensures a tight seal between the sealing edge and the sealing surface, filling the glue tank completely, with only a small amount overflowing. Most of the sealant remains within the glue tank, forming a complete sealing structure between the sealing cap and the tray. However, because the glue is prone to aging and delamination, the glue tank needs to be pre-processed. Furthermore, the glue requires a relatively long curing time, and the application process necessitates highly precise automated equipment, resulting in significant equipment investment. Even after the glue has cured, the battery pack may delaminate due to external forces or vibrations during use. Additionally, the battery pack requires additional structures for thermal runaway protection, including fire suppression and cooling measures. These structures not only occupy space and reduce the battery pack's assembly efficiency but also incur higher design and assembly costs.

[0005] In some related technologies, the sealing structure consists of a tray, a sealing cap, sealing foam, and a pressure strip. The pressure strip presses down on the sealing cap, causing the sealing foam to compress and deform. The sealing foam requires a high degree of flatness of the sealing surface of the tray, and the sealing foam will experience stress attenuation, leading to the risk of sealing failure in the later stages of its use.

[0006] Summary of the Invention

[0007] This application aims to at least solve one of the technical problems existing in the related art. To this end, one object of this application is to provide a battery box with an adjustable volume expansion rate of its sealing element, resulting in good sealing performance and high flexibility.

[0008] The battery box according to an embodiment of this application includes: a box body, the box body including a box frame and a box cover, the box cover for closing the opening of the box frame; a deformable seal, the seal being disposed between the box frame and the box cover for sealing the assembly gap between the box frame and the box cover, wherein the seal has a receiving channel extending along its length direction, the receiving channel for receiving a gas or liquid medium; and a controller for controlling the amount of medium filling the receiving channel and adjusting the pressure value in the receiving channel to adjust the volume expansion rate of the seal.

[0009] According to the battery box of the present application embodiment, by providing a seal with an adjustable volume expansion rate between the box body and the box cover, the pressure in the receiving channel can be adjusted according to the actual situation, thereby adjusting the sealing ability of the seal, so that the assembly gap between the box body and the box cover can be reliably sealed, and the flexibility is strong and the sealing effect is stable.

[0010] In addition, the battery box according to this application may also have the following additional technical features:

[0011] In some embodiments of this application, a first positioning part is provided on the box body and / or box cover, the first positioning part being used to limit the position of the sealing element.

[0012] In some embodiments of this application, the seal is provided with a second positioning part, which is positioned and engaged with the first positioning part.

[0013] In some embodiments of this application, multiple second positioning portions are spaced apart along the length direction of the seal, and multiple first positioning portions are provided, with each of the multiple first positioning portions corresponding to and cooperating with the multiple second positioning portions.

[0014] In some embodiments of this application, the first positioning part is a positioning groove, the second positioning part is a positioning block, and the positioning block is positioned and fitted within the positioning groove.

[0015] In some embodiments of this application, the positioning block includes a first leg and a second leg, with an included angle between the first leg and the second leg.

[0016] In some embodiments of this application, the positioning groove includes a first groove and a second groove. The first groove extends along the length direction of the first leg, and the second groove extends along the length direction of the second leg. The first leg is positioned and fitted in the first groove, and the second leg is positioned and fitted in the second groove.

[0017] In some embodiments of this application, the battery box further includes a sensor, the positioning block is provided with an assembly groove, at least a portion of the sensor is embedded in the assembly groove, the sensor is used to acquire the pressure value in the receiving channel, and the controller is used to control the filling amount of the medium in the receiving channel according to the pressure value, wherein when multiple positioning blocks are provided, at least one of the positioning blocks is provided with a sensor.

[0018] In some embodiments of this application, the battery box further includes a medium storage device, which is connected to the receiving channel. The controller is used to control the communication state between the medium storage device and the receiving channel, and to control the flow direction of the medium between the medium storage device and the receiving channel.

[0019] In some embodiments of this application, the medium includes one of air, CO2, N2, inert gas, perfluorohexanone, and heptafluoropropane.

[0020] In some embodiments of this application, the box body and the box cover are fixedly connected by screws.

[0021] In some embodiments of this application, the seal is an integrally injection-molded part.

[0022] In some embodiments of this application, the box body and / or the box cover are provided with sealing grooves, and a portion of the sealing element is located within the sealing groove.

[0023] In some embodiments of this application, the enclosure includes a base plate and a surrounding plate connected to the outer periphery of the base plate. The base plate and the surrounding plate define a receiving cavity for accommodating the battery cell. The surrounding plate is fixedly connected to the enclosure cover. The sealing groove is provided at the end of the surrounding plate facing the enclosure cover. The sealing groove is formed by the inner side of the surrounding plate recessed in a direction away from the receiving cavity.

[0024] This application also proposes a battery having the battery case described in the above embodiments.

[0025] According to the battery of this application, by providing a battery box with the above-described embodiments, the battery can have better sealing performance. In addition, when the receiving channel is filled with a gas or liquid with fire extinguishing properties, an automatic fire extinguishing effect can be achieved.

[0026] This application also proposes a battery for an electrical device having the above-described embodiments.

[0027] According to the embodiments of this application, by providing the battery of the above embodiments, the electrical equipment can better ensure the power supply stability and safety of the electrical equipment.

[0028] In some embodiments of this application, the electrical equipment can be a vehicle. When the battery of this application is applied to a vehicle, it can not only better protect the cells in the battery box, but also better extinguish the fire in the vehicle. Furthermore, since the battery box can be equipped with a medium storage device that stores fire extinguishing performance, the automatic fire extinguishing capability of the vehicle can be further improved.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 is a schematic diagram of the battery box according to an embodiment of this application.

[0032] Figure 2 is an exploded view of a battery according to an embodiment of this application.

[0033] Figure 3 is an enlarged view of region A in Figure 2.

[0034] Figure 4 is an enlarged view of region B in Figure 2.

[0035] Figure 5 is a schematic diagram of the structure of the battery box body according to an embodiment of this application.

[0036] Figure 6 is an enlarged view of region C in Figure 5.

[0037] Figure 7 is a cross-sectional view of a battery box according to an embodiment of this application.

[0038] Figure 8 is an enlarged view of region D in Figure 7.

[0039] Reference numerals: 10. Battery box; 1. Box body; 11. Box body; 111. Positioning groove; 1111. First groove; 1112. Second groove; 112. Sealing groove; 113. Base plate; 114. Enclosure plate; 12. Box cover; 2. Sealing element; 21. Receiving channel; 22. Positioning block; 221. First leg; 222. Second leg; 20. Battery cell. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] The battery box 10 according to an embodiment of the present application is described below with reference to Figures 1-8.

[0044] As shown in Figures 1-8, the battery box 10 according to an embodiment of this application includes a box body 1, a sealing element 2, and a controller (not shown in the figures). The box body 1 includes a box body 11 and a box cover 12. The box cover 12 is used to close the opening of the box body 11. That is, the battery cell 20 can be placed inside the box body 11. When the battery cell 20 is placed inside the box body 11, the opening of the box body 11 can be closed by the box cover 12 to enclose the battery cell 20 inside the box body 1. After the box cover 12 is connected to the box body 11, in order to further improve the seal between the box cover 12 and the box body 11, the assembly gap between the box cover 12 and the box body 11 can be sealed by the sealing element 2.

[0045] Regarding the seal 2, the seal 2 of this application is a deformable seal 2. The seal 2 is disposed between the housing body 11 and the housing cover 12 to seal the assembly gap between the housing body 11 and the housing cover 12. The seal 2 has a receiving channel 21 extending along its length direction. The receiving channel 21 is used to receive gas or liquid media. The controller is used to control the amount of media filling the receiving channel 21 to adjust the volume expansion rate of the seal 2.

[0046] In other words, the seal 2 of this application is a hollow seal 2. A hollow seal 2 is lightweight, resulting in good weight reduction. The seal 2 has an internal receiving channel 21, and the volume expansion rate of the seal 2 can be changed by altering the volume of the receiving channel 21, thereby adjusting the sealing capability of the seal 2 for the assembly gap. Compared to the sealing structures of battery boxes in related technologies, which are often solid (such as sealing rings, foam, or sealant), sealing failure often occurs after assembly due to stress decay or aging. This directly leads to insufficient sealing of the assembly gap, affecting the sealing space of the box and consequently the battery within, making it susceptible to external environmental corrosion. However, with the seal 2 of this application, as long as the sealing performance of the receiving channel 21 remains unaffected, even if the seal 2 ages, its volume expansion rate can still be changed by altering the pressure value within the receiving channel 21, thus adjusting the volume of the seal 2. Therefore, the sealing performance of the seal 2 can be ensured more flexibly. Furthermore, since the volume expansion rate of the seal 2 in this application can change, the flatness requirement at the assembly position is lower. Therefore, the flatness accuracy of the box body 11 or the box cover 12 can be reduced, thereby reducing the production cost of the box body 11 or the box cover 12.

[0047] For example, when the temperature is too low, the pressure in the receiving channel 21 decreases due to the drop in temperature, causing the seal 2 to shrink and deform, thus reducing its volume. In this case, the controller can replenish the receiving channel 21 with gas or liquid, increasing the pressure and thus increasing the volume of the seal 2, thereby ensuring a complete seal of the assembly space. In some embodiments of this application, when the temperature is too high, the pressure in the receiving channel 21 increases due to the temperature change, causing the seal 2 to expand and deform, thus increasing its volume. However, excessive expansion of the seal 2 can easily compress the housing 11 or the cover 12, potentially causing deformation or damage. The controller can then discharge some of the gas or liquid from the receiving channel 21, ensuring that the seal 2 reliably seals the assembly gap without damaging the housing 11, cover 12, or itself. This provides high flexibility and a stable and reliable sealing effect.

[0048] For the above example, it is understood that the volume of the seal 2 and the medium of gas or liquid in the receiving channel 21 can also be changed by other factors. When the changes occur, the seal 2 of this application can adjust the pressure in the receiving channel 21 according to the actual situation, thereby adjusting the sealing capacity of the seal 2, so that the assembly gap between the box body 11 and the box cover 12 can be reliably sealed.

[0049] According to the battery box 10 of this application embodiment, by providing a seal 2 with an adjustable volume expansion rate between the box body 11 and the box cover 12, the pressure in the receiving channel 21 can be adjusted according to the actual situation, thereby adjusting the sealing ability of the seal 2, so that the assembly gap between the box body 11 and the box cover 12 can be reliably sealed, and it is highly flexible and has a stable sealing effect.

[0050] In some embodiments of this application, as shown in Figures 1-2, a first positioning part is provided on the box body 11 and / or box cover 12. The first positioning part is used to limit the position of the sealing element 2. That is, the first positioning part can quickly position the assembly of the sealing element 2, which can improve the assembly efficiency of the sealing element 2. Furthermore, after the sealing element 2 is assembled, its position can be limited. Thus, when the box body 11 and the box cover 12 are fixedly connected, the position of the sealing element 2 can be prevented from changing, thereby affecting the sealing effect of the sealing element 2.

[0051] As shown in Figures 1 and 2, in one example, the first positioning part can be provided on the box body 11, the box cover 12, or both the box body 11 and the box cover 12. When both the box body 11 and the box cover 12 are provided with the first positioning part, the first positioning part on the box body 11 can be positioned opposite to the first positioning part on the box cover 12. This relative positioning means that the first positioning part on the box body 11 and the first positioning part on the box cover 12 can position the seal 2 at the same position on both sides. In another example, when both the box body 11 and the box cover 12 are provided with the first positioning part, the first positioning part on the box body 11 can be positioned opposite to the first positioning part on the box cover 12, or they can be not positioned opposite each other. That is, the first positioning part on the box body 11 and the first positioning part on the box cover 12 can position the seal 2 at different positions. There are no restrictions on the above, and the arrangement can be made according to the specific working and design conditions.

[0052] In some embodiments of this application, as shown in Figures 1-2, a second positioning part is provided on the sealing member 2, which is positioned and engaged with the first positioning part. Therefore, the mutual engagement of the first and second positioning parts facilitates the positioning and assembly of the sealing member 2, and also helps to restrict the position of the sealing member 2 when the housing body 11 and the housing cover 12 are fixedly connected.

[0053] In some embodiments of this application, as shown in Figures 1-2, multiple second positioning portions are spaced apart along the length of the seal 2, and multiple first positioning portions are provided, with each of the multiple first positioning portions corresponding to and cooperating with a multiple of the second positioning portions. This facilitates the positioning and assembly of the seal 2, and further enhances the ability to restrict the position of the seal 2 when the housing 11 and the housing cover 12 are fixedly connected.

[0054] In some embodiments of this application, as shown in Figures 1-8, the first positioning part is a positioning groove 111, and the second positioning part is a positioning block 22, which is positioned and fitted within the positioning groove 111. Here, the positioning groove 111 can be a square groove, a circular groove, or a groove of other shapes; there is no limitation. Similarly, the shape of the positioning block 22 can be cylindrical, rectangular, etc., and there is no need to limit it. The cooperation between the positioning groove 111 and the positioning block 22 in this application not only facilitates the assembly of the seal 2, but also, due to the relatively simple structure of the positioning groove 111 and the positioning block 22, can significantly reduce the production cost of the battery box 10 in this application.

[0055] In some embodiments of this application, as shown in Figures 2-6, the positioning block 22 includes a first leg 221 and a second leg 222, with an included angle between the first leg 221 and the second leg 222. Thus, after the first leg 221 and the second leg 222, forming an included angle, are positioned and engaged with the positioning groove 111, they can limit the sealing element 2 in multiple directions, thereby ensuring that the sealing element 2 can be stably maintained in the sealing position, and thus improving the sealing effect of the sealing element 2.

[0056] In some embodiments of this application, the positioning groove 111 includes a first groove 1111 and a second groove 1112. The first groove 1111 extends along the length direction of the first leg 221, and the second groove 1112 extends along the length direction of the second leg 222. The first leg 221 is positioned and fitted in the first groove 1111, and the second leg 222 is positioned and fitted in the second groove 1112.

[0057] Referring to a specific example shown in Figure 3, both the first leg 221 and the second leg 222 are elongated rectangular blocks, perpendicular to each other. One end of the first leg 221 is connected to the body of the seal 2, and the other end is connected to the middle of the second leg 222. Thus, the first leg 221 and the second leg 222 form a "T" shaped structure. The positioning groove 111 includes a first groove 1111 and a second groove 1112 extending perpendicularly to each other. The first groove 1111 connects the second groove 1112 and the sealing groove 112. That is, the positioning groove 111 can also be set as a "T" shaped structure. When the positioning block 22 of the "T" shaped structure is positioned and engaged with the positioning groove 111 of the "T" shaped structure, the positioning block 22 is not easy to detach from the positioning groove 111. In this way, the position of the seal 2 can be positioned well, and the stability is good.

[0058] In some embodiments of this application, the included angle between the first leg 221 and the second leg 222 can be a right angle or an acute angle. This application does not limit the included angle between the first leg 221 and the second leg 222. Specifically, the included angle between the first leg 221 and the second leg 222 can be, for example, 30°, 40°, 50°, 60°, 70°, 80°, 90°, etc.

[0059] In some embodiments of this application, in the specific example shown in Figure 3, the positioning block 22 is located on the outer periphery of the seal 2. In other examples, the positioning block 22 may also be located on the inner periphery of the seal 2, or the positioning block 22 may be provided on both the outer periphery and the inner periphery of the seal 2. This application does not limit this.

[0060] In some embodiments of this application, the battery box 10 further includes a sensor, and the positioning block 22 is provided with an assembly groove. At least part of the sensor is embedded in the assembly groove. The sensor is used to obtain the pressure value in the receiving channel 21. The controller is used to control the amount of medium filling in the receiving channel 21 according to the pressure value. When there are multiple positioning blocks 22, at least one positioning block 22 is provided with a sensor.

[0061] Referring to Figure 2, the housing 1 is a rectangular housing 1. Positioning grooves 111 are provided at the four corners of the housing 11. Four sensors can be provided, and the four sensors are respectively installed in the assembly grooves of the four positioning blocks 22. In this way, the pressure in the receiving channel 21 can be detected better, so that the controller can control the pressure value of the receiving channel 21, thereby ensuring the sealing performance of the seal 2.

[0062] In some embodiments of this application, the battery box 10 further includes a media storage device, which is connected to the receiving channel 21. A controller is used to control the communication state between the media storage device and the receiving channel 21, and to control the flow direction of the media between the media storage device and the receiving channel 21. By setting up the media storage device, not only can the media be provided in the receiving channel 21 better, but the media discharged from the receiving channel 21 can also be stored better, so that the media in the receiving channel 21 can be replenished or discharged at any time.

[0063] In some embodiments of this application, the medium includes one of the following: air, CO2, N2, inert gas, perfluorohexanone, and heptafluoropropane. Of course, the medium can also be other gases or liquids, and there are no limitations on this.

[0064] For the gases or liquids listed above, taking CO2, N2, inert gases, perfluorohexanone, and heptafluoropropane as examples, as shown in Figures 1 and 2, when the battery cell 20 in the battery box 10 experiences thermal runaway, the seal 2 is easily melted, causing CO2, N2, inert gases, perfluorohexanone, and heptafluoropropane to be released. When these gases or liquids are released into the battery box 10, they can effectively extinguish the high-temperature flames generated by the thermal runaway of the battery cell 20, thus achieving automatic fire extinguishing. Furthermore, when the gas or liquid in the containment channel 21 is discharged due to fire extinguishing, the controller can also control the replenishment of gas or liquid in the medium storage device, thereby further improving the automatic fire extinguishing effect.

[0065] In some embodiments of this application, the box body 11 and the box cover 12 are fixedly connected by screws, which facilitates the assembly and disassembly of the box body 11 and the box cover 12, and also facilitates the adjustment of the gap in the assembly space between the box body 11 and the box cover 12. Furthermore, with the addition of a seal 2 with an adjustable volume expansion rate, the connection between the box body 11 and the box cover 12 is more flexible, and the seal is more reliable.

[0066] In one example, the seal 2 can be made of rubber material. A seal 2 made of rubber material can be manufactured by integral injection molding, resulting in a simple structure and convenient operation. In some embodiments of this application, the cross-sectional shape of the receiving channel 21 within the seal 2 can be circular, square, or other shapes; no limitation is made here. Taking a circular receiving channel 21 as an example, when the pressure within the circular receiving channel 21 changes, the volume of the seal 2 can increase or decrease more uniformly in the circumferential direction. Conversely, a square receiving channel 21 allows for better directional expansion or contraction of the seal 2's volume. Therefore, the cross-sectional shape of the receiving channel 21 can be designed according to actual working requirements, and this application does not impose any limitations.

[0067] In some embodiments of this application, as shown in Figures 3-6, a sealing groove 112 is provided on the box body 11 and / or box cover 12, and a portion of the sealing element 2 is located within the sealing groove 112. In one example, a sealing groove 112 can be provided on the box body 11. By providing a sealing groove 112, the position of the sealing element 2 can be better restricted, and the expansion direction of the sealing element 2 can be better controlled, thereby improving the sealing performance of the sealing element 2. Alternatively, a portion of the sealing element 2 may be located within the sealing groove 112, while another portion protrudes from the sealing groove 112. The protruding portion of the sealing element 2 can fill the assembly gap between the box body 11 and the box cover 12, thereby achieving a seal on the assembly gap.

[0068] In some embodiments of this application, as shown in Figures 3-6, the housing 11 includes a bottom plate 113 and a surrounding plate 114 connected to the outer periphery of the bottom plate 113. The bottom plate 113 and the surrounding plate 114 define a receiving cavity for accommodating the battery cell 20. The surrounding plate 114 is fixedly connected to the housing cover 12. A sealing groove 112 is provided at the end of the surrounding plate 114 facing the housing cover 12. The sealing groove 112 is recessed from the inner side of the surrounding plate 114 in a direction away from the receiving cavity. Therefore, when the battery cell 20 experiences thermal runaway, the sealing element 2 can be baked more easily, causing the sealing element 2 to break, thereby releasing the gas or liquid with fire extinguishing properties in the receiving channel 21, thus achieving an automatic fire extinguishing effect.

[0069] This application also proposes a battery having the battery case 10 described in the above embodiments.

[0070] According to the battery of this application, by providing the battery box 10 of the above embodiment, the battery can have better sealing performance. In addition, when the receiving channel 21 is filled with a gas or liquid with fire extinguishing properties, the effect of automatic fire extinguishing can be achieved.

[0071] This application also proposes a battery for an electrical device having the above-described embodiments.

[0072] According to the embodiments of this application, by providing the battery of the above embodiments, the electrical equipment can better ensure the power supply stability and safety of the electrical equipment.

[0073] In some embodiments of this application, the electrical equipment can be a vehicle. When the battery of this application is applied to a vehicle, it can not only better protect the battery cells 20 in the battery box 10, but also better extinguish the fire in the vehicle. Furthermore, since the battery box 10 can be equipped with a medium storage device that stores fire extinguishing performance, the automatic fire extinguishing capability of the vehicle can be further improved.

[0074] Other components and operations of the battery box 10, battery, and electrical equipment according to embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0075] In the description of this specification, references to terms such as "some embodiments" or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery box (10), wherein, include: Box (1), the box (1) includes a box body (11) and a box cover (12), the box cover (12) is used to close the opening of the box body (11); A deformable seal (2) is disposed between the housing body (11) and the housing cover (12) to seal the assembly gap between the housing body (11) and the housing cover (12), wherein the seal (2) has a receiving channel (21) extending along its length direction for receiving a gas or liquid medium; The controller is used to control the amount of medium filling in the receiving channel (21) and adjust the pressure value in the receiving channel (21) to adjust the volume expansion rate of the seal (2).

2. The battery box (10) according to claim 1, wherein, The box body (11) and / or box cover (12) are provided with a first positioning part, which is used to limit the position of the sealing element (2).

3. The battery box (10) according to claim 2, wherein, The sealing element (2) is provided with a second positioning part, which is positioned and engaged with the first positioning part.

4. The battery box (10) according to claim 3, wherein, The second positioning part is provided in multiple spaced intervals along the length direction of the seal (2), and the first positioning part is provided in multiple ways, with each of the multiple first positioning parts corresponding to and cooperating with the multiple second positioning parts.

5. The battery box (10) according to claim 3 or 4, wherein, The first positioning part is a positioning groove (111), and the second positioning part is a positioning block (22), which is positioned and fitted in the positioning groove (111).

6. The battery box (10) according to claim 5, wherein, The positioning block (22) includes a first leg (221) and a second leg (222), with an included angle between the first leg (221) and the second leg (222).

7. The battery box (10) according to claim 6, wherein, The positioning groove (111) includes a first groove (1111) and a second groove (1112). The first groove (1111) extends along the length direction of the first support leg (221), and the second groove (1112) extends along the length direction of the second support leg (222). The first support leg (221) is positioned and fitted in the first groove (1111), and the second support leg (222) is positioned and fitted in the second groove (1112).

8. The battery box (10) according to claim 5, wherein, It also includes a sensor, and the positioning block (22) is provided with an assembly groove. At least part of the sensor is embedded in the assembly groove. The sensor is used to obtain the pressure value in the receiving channel (21). The controller is used to control the amount of medium filling in the receiving channel (21) according to the pressure value. When there are multiple positioning blocks (22), at least one of the positioning blocks (22) is provided with a sensor.

9. The battery box (10) according to any one of claims 1-8, wherein, It also includes a media storage device, which is connected to the receiving channel (21). The controller is used to control the connection state between the media storage device and the receiving channel (21) and to control the flow direction of the media between the media storage device and the receiving channel (21).

10. The battery box (10) according to any one of claims 1-9, wherein, The medium includes one of the following: air, CO2, N2, inert gas, perfluorohexanone, and heptafluoropropane.

11. The battery box (10) according to any one of claims 1-9, wherein, The box body (11) and the box cover (12) are fixedly connected by screws.

12. The battery box (10) according to any one of claims 1-9, wherein, The sealing element (2) is an integral injection molded part.

13. The battery box (10) according to any one of claims 1-12, wherein, A sealing groove (112) is provided on the box body (11) and / or the box cover (12), and part of the sealing element (2) is located in the sealing groove (112).

14. The battery box (10) according to claim 13, wherein, The enclosure (11) includes a bottom plate (113) and a surrounding plate (114) connected to the outer periphery of the bottom plate (113). The bottom plate (113) and the surrounding plate (114) define a receiving cavity for accommodating the battery cell (20). The surrounding plate (114) is fixedly connected to the enclosure cover (12). The end of the surrounding plate (114) facing the enclosure cover (12) is provided with the sealing groove (112). The sealing groove (112) is formed by the inner side of the surrounding plate (114) recessed in a direction away from the receiving cavity.

15. A battery, wherein, The battery box (10) includes any one of claims 1-14.

16. An electrical appliance, wherein, Includes the battery as described in claim 15.

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