CN113680181B - Drying device and battery pack - Google Patents

Abstract

The application discloses a drying device and a battery pack. The drying device is used for the battery pack, and the drying device includes a base and a drying component. The base includes a body, a first arm, a second arm and a tray, one end of the first arm is connected to the body, the other end of the first arm is connected to the tray, one end of the second arm is connected to the body, and the second arm is connected to the body. The other end of the support arm is connected with the tray, and the tray is provided with an installation cavity. The drying component is detachably clamped in the installation cavity, and is used for absorbing water vapor in the battery pack. The drying assembly of the present application can absorb water vapor in the battery pack, so that water vapor is not easy to exist in the battery pack, and the problem of condensation in the battery pack can be avoided. At the same time, the drying assembly is detachably snapped into the installation cavity for easy replacement Dry components ensure the long-term reliability of the anti-condensation performance of the battery pack, thereby improving the safety performance of the battery pack.

Description

Drying device and battery pack

technical field

The present application relates to the technical field of battery drying, and more specifically, to a drying device and a battery pack.

Background technique

The automotive industry is undergoing revolutionary changes. Traditional fuel vehicles are gradually being replaced by new energy vehicles. Among them, pure electric vehicles are emerging as a type of new energy vehicles. Many transmission fuel vehicle platforms directly replace the engine structure with power batteries. The battery pack structure replaces the power source of the car from fuel to batteries. With the development of new energy vehicles, the safety design of battery packs has become the focus of research and design of major battery factories. However, the problem of condensation in the battery pack has always been a problem that is difficult to solve. In severe cases, it will lead to problems such as BMS message errors and short circuits, which seriously affect the safety performance of the vehicle.

Contents of the invention

Embodiments of the present application provide a drying device and a battery pack.

The drying device according to the embodiment of the present application is used for a battery pack, and the drying device includes a base and a drying component. The base includes a body, a first arm, a second arm and a tray, one end of the first arm is connected to the body, the other end of the first arm is connected to the tray, the One end of the second arm is connected to the body, the other end of the second arm is connected to the tray, and the tray is provided with an installation cavity. The drying assembly is detachably clamped in the installation cavity for absorbing water vapor in the battery pack.

In some embodiments, the tray includes a spaced first side wall and a second side wall, and the first side wall is closer to the body than the second side wall, and the first side wall and/or Or the second side wall is provided with a ventilation hole communicating with the installation cavity.

In some embodiments, the first arm includes a first sub-arm connected to a second sub-arm, the first sub-arm is connected to the body, and the second sub-arm is connected to the tray , the angle formed by the first sub-arm and the second sub-arm is an obtuse angle; the second sub-arm includes a connected third sub-arm and a fourth sub-arm, and the third sub-arm and the The body is connected, the fourth sub-arm is connected to the tray, and the angle formed between the third sub-arm and the fourth sub-arm is an obtuse angle.

In some embodiments, the body is provided with a sealing groove, and the drying device further includes a sealing ring, the sealing ring is installed in the sealing groove and protrudes from the body, and the sealing ring is used for A gap between the body and an external structure is sealed.

In some embodiments, the sealing ring includes a sealing main body and a sealing protrusion provided on the sealing main body, and the sealing protrusion is used to resist against the inner surface of the sealing groove.

In some embodiments, the body is also provided with a dismounting groove communicating with the sealing groove, the dismounting groove is located on the lower side of the sealing groove, and the sealing ring includes a sealing body and a dismounting groove arranged on the sealing body. part, the sealing main body is installed in the sealing groove, and the dismounting part is installed in the dismounting groove.

In some embodiments, the drying device further includes an explosion-proof valve, the body is provided with a through escape hole, and the body, the first arm, the second arm and the tray jointly enclose into a receiving space, at least part of the explosion-proof valve protrudes into the receiving space through the avoidance hole.

In some embodiments, the desiccant assembly includes a desiccant and a housing, the housing is provided with a receiving chamber for accommodating the desiccant, and the housing is clipped into the installation chamber.

In some embodiments, the housing includes a first sub-shell and a second sub-shell, the first sub-shell is provided with a first sub-cavity, and is used for snapping into the installation cavity; The sub-shell is provided with a second sub-cavity, the first sub-cavity communicates with the second sub-cavity and jointly forms the receiving cavity, and the second sub-casing is clamped with the first sub-cavity.

The battery pack in the embodiment of the present application includes a box body and the drying device described in any one of the above-mentioned embodiments, the box body is provided with a battery chamber and a through hole communicating with the battery chamber, and the battery chamber is used to accommodate the battery; The drying device is installed in the box body, and the drying assembly communicates with the battery cavity through the through hole.

In the drying device and the battery pack of the present application, the drying device includes a base and a drying assembly, the base includes a body, a first arm, a second arm and a tray, and the first arm and the second arm can provide support for the tray At the same time, the distance between the tray and the body can be increased. The tray is provided with an installation cavity, and the dry assembly is detachably snapped into the installation cavity, and the dry assembly can absorb the water vapor in the battery pack, making it difficult for water to exist in the battery pack. Steam can avoid the problem of condensation in the battery pack. At the same time, the dry component is detachably snapped into the installation cavity, which is convenient for replacing the dry component, ensuring the long-term reliability of the battery pack’s anti-condensation performance, and thus improving the battery pack. safety performance.

Additional aspects and advantages of the embodiments of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the embodiments of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and understandable from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic diagram of a plane assembly of a battery pack according to an embodiment of the present application;

Fig. 2 is the enlarged schematic view of area II in Fig. 1;

3 is a partially exploded perspective view of a battery pack according to an embodiment of the present application;

Fig. 4 is a partial three-dimensional assembly diagram of the battery pack according to the embodiment of the present application;

Fig. 5 is a schematic three-dimensional assembly diagram of a viewing angle of the drying device according to the embodiment of the present application;

Fig. 6 is a schematic plan view of a perspective assembly of the drying device according to the embodiment of the present application;

Fig. 7 is a schematic planar assembly diagram of another viewing angle of the drying device according to the embodiment of the present application;

Fig. 8 is a schematic cross-sectional view of a drying device according to an embodiment of the present application;

FIG. 9 is a schematic perspective view of the base of the drying device according to the embodiment of the present application;

Fig. 10 is a schematic plan view of the base of the drying device according to the embodiment of the present application;

Fig. 11 is a schematic plan view of the sealing ring of the drying device according to the embodiment of the present application;

12 is a schematic perspective view of the three-dimensional structure of the drying assembly of the drying device according to the embodiment of the present application;

Fig. 13 is a schematic plan view of the drying assembly of the drying device according to the embodiment of the present application;

Fig. 14 is a schematic cross-sectional view of a drying assembly of a drying device according to an embodiment of the present application.

Detailed ways

Embodiments of the present application will be further described below in conjunction with the accompanying drawings. The same or similar reference numerals in the drawings represent the same or similar elements or elements having the same or similar functions throughout.

In addition, the embodiments of the present application described below in conjunction with the accompanying drawings are exemplary, and are only used to explain the embodiments of the present application, and should not be construed as limiting the present application.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

Please refer to FIG. 1 to FIG. 4 , the present application provides a battery pack 100 , and the battery pack 100 includes a drying device 10 and a box body 20 . The box body 20 can be provided with a battery cavity 21 and a through hole 22 communicating with the battery cavity 21 , the battery cavity 21 can be used for accommodating batteries, and the drying device 10 can be installed in the box body 20 .

Please refer to FIG. 1 to FIG. 4 , the present application also provides a battery pack 100 , and the battery pack 100 includes a drying device 10 and a box body 20 . The box body 20 is formed with a battery cavity 21 and a through hole 22 communicating with the battery cavity 21 , and the battery cavity 21 can be used for accommodating a battery. The drying device 10 can include a base 11 and a drying assembly 12 installed on the base 11, the base 11 is installed on the casing 20, a part of the base 11 is located on the outer wall of the casing 20, and the drying assembly 12 extends into the casing 20. The battery chamber 21 is used to absorb water vapor in the battery chamber 21 .

Referring to FIG. 3 to FIG. 5 , the embodiment of the present application also provides a drying device 10 , which is used for a battery pack 100 . The drying device 10 includes a base 11 and a drying assembly 12 , the base 11 includes a body 111 , a first arm 112 , a second arm 113 and a tray 114 . One end of the first arm 112 is connected to the body 111 , and the other end of the first arm 112 is connected to the tray 114 . One end of the second arm 113 is connected to the body 111 , and the other end of the second arm 113 is connected to the tray 114 . The tray 114 is provided with an installation cavity 1141 , and the drying assembly 12 is detachably snapped into the installation cavity 1141 for absorbing water vapor in the battery pack 100 . The drying assembly 12 can communicate with the battery cavity 21 through the through hole 22 and can absorb water vapor, water drops, etc. in the battery cavity 21 .

In the drying device 10 and the battery pack 100 of the present application, the drying device 10 includes a base 11 and a drying assembly 12, the base 11 includes a body 111, a first arm 112, a second arm 113 and a tray 114, and the first arm 112 and the second arm 113 can provide support for the tray 114, and at the same time can increase the distance between the tray 114 and the body 111, the tray 114 is provided with an installation cavity 1141, and the drying assembly 12 is detachably snapped into the installation cavity 1141, and The drying assembly 12 can absorb the water vapor in the battery pack 100, so that water vapor is not easy to exist in the battery pack 100, and the problem of condensation in the battery pack 100 can be avoided. At the same time, the drying assembly 12 is detachably snapped into the installation cavity 1141 , it is convenient to replace the drying assembly 12 , ensuring the long-term reliability of the anti-condensation performance of the battery pack 100 , thereby improving the safety performance of the battery pack 100 .

The drying device 10 will be described in detail below in conjunction with the accompanying drawings.

Referring to FIG. 3 , FIG. 5 to FIG. 8 , the drying device 10 includes a base 11 and a drying assembly 12 . The base 11 can be installed on an external structure (for example, the case 20 of the battery pack 100 ), and the drying assembly 12 can be installed on the base 11 . The embodiment of the present application is illustrated by taking the case 20 whose external structure is the battery pack 100 as an example. It can be understood that the external structure may also be other components in the battery pack 100 , which is not limited here.

The base 11 can be used to provide support and installation space for the drying component 12 , and the base 11 can also provide support and installation space for other components (such as explosion-proof valves). The base 11 can be detachably connected to the case body 20 of the battery pack 100 , so that the base 11 can be detached from the case body 20 when the drying assembly 12 needs to be replaced. The base 11 may include a body 111 , a first arm 112 , a second arm 113 and a tray 114 .

Please refer to FIG. 9 , the body 111 can be detachably connected to the box body 20 of the battery pack 100 , so that the body 111 can be easily disassembled. The body 111 may include a first surface 1111 and a second surface 1112 opposite to each other. When the body 111 is installed on the box body 20, the first surface 1111 is closer to the box body 20 than the second surface 1112, and can be connected to the box body. 20 relative. The body 111 can define a first connection hole 1113 passing through the first surface 1111 and the second surface 1112 , and the side wall 23 of the box body 20 can define a second connection hole 231 . The drying device 10 may further include a fastener 101 , the fastener 101 may pass through the first connection hole 1113 and the second connection hole 231 , and fix the main body 111 on the box body 20 . In one embodiment, the fastener 101 can be a bolt, and a groove can also be provided in the first connecting hole 1113, and the groove can be used to avoid the boss or nut of the blind rivet nut, so that the bolt is not easy to protrude from the body .

Please refer to Fig. 5, Fig. 9 and Fig. 10, in some embodiments, the drying device 10 can also include a sealing ring 13, and the body 111 can also be provided with a sealing groove 1114, and the sealing ring 13 can be installed in the sealing groove 1114. When installed on the box body 20, the sealing ring 13 can be used to seal the gap between the main body 111 and the box body 20, so that water, water vapor, dust, etc. in the external environment are not easy to enter from the gap between the body 111 and the box body 20 to the inside of the battery pack 100, thereby ensuring the safety of the battery pack 100.

Specifically, referring to FIG. 3 , the first surface 111 of the body 111 can define a sealing groove 1114 , and when the sealing ring 13 is installed in the sealing groove 1114 , the sealing ring 13 can protrude from the first surface 111 of the body 111 . The sealing groove 1114 can be annular, and the sealing ring 13 can be annular, so as to seal the gap between the main body 111 and the box body 20 circumferentially. The side wall 21 of the box body 20 can be provided with a through hole 22, the shape of the sealing groove 1114 and the sealing ring 13 can be similar to or the same as the shape of the through hole 22, and the sealing ring 13 can be against the inner surface of the through hole 22, By fully sealing the gap between the first surface 1111 of the main body 111 and the box body 20 , the waterproof performance between the drying device 10 and the box body 20 is improved.

Wherein, the sealing ring 13 can be interference-fitted with the sealing groove 1114 and/or the through hole 22 , which can prevent the sealing ring 13 from falling off from the sealing groove 1114 , and can also improve the sealing performance of the sealing ring 13 . The sealing ring 13 can be made of rubber, silica gel and other materials to have better deformability.

Further, referring to FIG. 11 , in some embodiments, the sealing ring 13 may include a sealing body 131 and a sealing protrusion 132 disposed on the sealing body 131 . The sealing protrusion 132 may protrude from the sealing body 131 , or in other words, the sealing protrusion 132 may be a bump formed on the sealing body 131 . The sealing protrusion 132 can be provided on at least one side of the sealing body 131 , and the sealing protrusion 132 can be located inside and/or outside the annular area surrounded by the sealing main body 131 . The sealing body 131 can be installed in the sealing groove 1114, and the sealing protrusion 132 can be in contact with the inner surface of the sealing groove 1114, and the sealing protrusion 132 can ensure an effective interference fit of the sealing ring 13 in the process of being assembled into the sealing groove 1114 To ensure the stability of the assembly; at the same time, compared with the sealing ring 13 that directly seals the main body 131 and the sealing groove 1114 with an interference fit, the sealing ring 13 is smaller in size and lighter in weight.

Wherein, the number of sealing protrusions 132 can be multiple, such as 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20 or more. The plurality of sealing protrusions 132 can be distributed evenly or arbitrarily. In one example, the inner surface of the sealing groove 1114 can also be provided with a sealing groove 1110, the sealing groove 1110 can correspond to the sealing protrusion 132, the sealing protrusion 132 can be installed in the sealing groove 1110, and the sealing groove 1110 Corresponding to the sealing protrusion 132 can improve the ease of assembly of the sealing ring 13 .

Furthermore, please continue referring to FIG. 11 , in some embodiments, the sealing ring 13 may further include a detachable part 133 provided on the sealing main body 131. When the sealing main body 131 is installed in the sealing groove 1114, the user can clamp the detachable part 133 or move the dismounting part 133 to remove the sealing ring 13 from the sealing groove 1114, so that the disassembly of the sealing ring 13 is facilitated.

In some of these embodiments, please refer to FIG. 6 and FIG. 10 , the body 111 can also be provided with a detachment groove 1115 communicating with the sealing groove 1114, when the sealing main body 131 is installed in the sealing groove 1114, the detachment part 133 can be installed in the detachment groove 1115 , in this way, it is convenient for the user to operate the detachment part 133 . Wherein, the detachment part 133 can be structures such as bumps, strips, and plates connected to the sealing body 131 , which are not listed here.

Furthermore, the removal groove 1115 is located on the lower side of the sealing groove 1114, and the removal groove 1115 penetrates the bottom surface of the main body 111, so liquids such as moisture in the external environment or the battery pack 100 may enter the sealing groove 1114, and then flow to the sealing groove 1114. The lower side of the groove 1114, and the dismantling groove 1115 is located at the lower side of the sealing groove 1114, so that the liquid in the sealing groove 1114 can flow out from the dismantling groove 1115, so that the liquid is not easy to exist in the sealing groove 1114, and the liquid in the sealing groove 1114 is avoided. The battery pack 100 is affected, and the liquid in the sealing groove 1114 is prevented from affecting the service life of the drying assembly 12 .

5 and 9, one end of the first arm 112 can be connected to the body 111, and the other end of the first arm 112 can be connected to the tray 114, that is, the first arm 112 can be connected from the first surface of the body 111. 1111 extends away from the second surface 1112 of the body 111 . The first arm 112 can support the tray 114 and the drying assembly 12 inside the tray 114 . When the drying device 10 is installed on the box body 20 , the first arm 112 can extend into the through hole 22 . Please refer to Figure 3 and Figure 4, the first arm 112 can also increase the distance between the tray 114 and the first surface 1111 of the body 111, so that the tray 114 extends into the box body 20, on the one hand, it can reduce the drying device 10. The volume of the box body 20 is exposed. On the other hand, the drying assembly 12 can also better absorb the water vapor generated in the battery pack 100 .

Further, in some embodiments, the first arm 112 may include a first sub-arm 1121 and a second sub-arm 1122 connected. The first sub-arm 1121 can be connected with the body 111 and can extend from the first surface 1111 of the body 111 toward a direction away from the second surface 1112 of the body 111 . The second sub-arm 1122 can extend vertically or obliquely from the first sub-arm 1121 in a direction away from the second surface 1112 , and is connected to the tray 114 . The extending directions of the second sub-arm 1122 and the first sub-arm 1121 may be different, and the angle formed between the second sub-arm 1122 and the first sub-arm 1121 may be an obtuse angle.

5 and 9, one end of the second arm 113 can be connected to the body 111, and the other end of the second arm 113 can be connected to the tray 114, that is, the second arm 113 can be connected from the first surface of the body 111. 1111 extends away from the second surface 1112 of the body 111 . The second arm 113 can support the tray 114 and the drying assembly 12 inside the tray 114 . When the drying device 10 is installed on the box body 20 , the second arm 113 can extend into the through hole 22 . Please refer to Figure 3 and Figure 4, the second arm 113 can also increase the distance between the tray 114 and the first surface 1111 of the body 111, so that the tray 114 can extend into the box body 20, on the one hand, it can reduce the drying device 10. The volume of the box body 20 is exposed. On the other hand, the drying assembly 12 can also better absorb the water vapor generated in the battery pack 100 .

Further, in some embodiments, the second arm 113 may include a third sub-arm 1131 and a fourth sub-arm 1134 that are connected. The third sub-arm 1131 can be connected with the body 111 and can extend from the first surface 1111 of the body 111 toward a direction away from the second surface 1112 of the body 111 . The fourth sub-arm 1132 may extend vertically or obliquely from the third sub-arm 1133 in a direction away from the second surface 1112 , and the fourth sub-arm 1132 may be connected to the tray 114 . The extension directions of the fourth sub-arm 1132 and the third sub-arm 1131 may be different, and the angle formed between the fourth sub-arm 1132 and the third sub-arm 1131 may be an obtuse angle.

In the embodiment shown in FIG. 5 and FIG. 9 , the second sub-arm 1122 is inclined from the first sub-arm 1121 in a direction away from the second surface 1112 and close to the center line of the main body 111 , and the fourth sub-arm 1132 is inclined from the third sub-arm 1132 . The sub-arm 1131 is inclined away from the second surface 1112 and close to the center line of the main body 111. In this way, the structure of the base 11 is more compact, which can save the volume occupied by the base 11 and facilitate better layout of the battery pack 100. other parts. In one example, the first arm 112 and the second arm 113 can be symmetrical with respect to the center of the tray 114, that is, the first sub-arm 1121 and the third sub-arm 1131 are symmetrical with respect to the center of the tray 114, and the second sub-arm 1122 and the fourth sub-arm 1132 are symmetrical to the center of the tray 114 .

Wherein, the first arm 112 and the second arm 113 can be connected to the upper and lower sides of the body 111 respectively, and the first arm 112 and the second arm 113 can also be connected to the left and right sides of the body 111 respectively.

Referring to FIG. 5 and FIG. 9 , one end of the tray 114 is connected to the first arm 112 , and the other end of the tray 114 is connected to the second arm 113 . It can be understood that the tray 114 is located between the first arm 112 and the second arm 113 , and the tray 114 is provided with an installation cavity 1141 which can be used for installing the drying assembly 12 . Since both the first arm 112 and the second arm 113 extend toward the second surface 1112 away from the body 111 , when the body 111 is installed on the box body 20 , the tray 114 can extend into the box body 20 .

The base 11 can be integrally formed by injection molding, casting and other processes to obtain the body 111 , the first arm 112 , the second arm 113 and the tray 114 . That is, the body 111 , the first support arm 112 , the second support arm 113 and the tray 114 can be integrated. In this way, the connection among the body 111 , the first arm 112 , the second arm 113 and the tray 114 is stable.

The tray 114 together with the main body 111 , the first arm 112 and the second arm 113 can form a storage space 110 , and the storage space 110 can be used to avoid or accommodate other components. In the embodiment shown in FIG. 5 , the receiving space 110 can be a hexagonal prism.

Specifically, the tray 114 may include a plurality of side walls 1142, and the plurality of side walls 1142 may together form an installation cavity 1141, and one side of the installation cavity 1141 may be open, and the drying assembly 12 may be put into the installation cavity 1141 from the opening of the installation cavity 1141. Inside. The plurality of sidewalls 1142 may include a first sidewall 1143 and a second sidewall 1144, the first sidewall 1143 may be spaced from the second sidewall 1144, and the first sidewall 1143 is closer to the body 111 than the second sidewall 1144 , the first side wall 1143 and the second side wall 1144 can both be provided with a vent hole 1145 communicating with the installation cavity 1141, or the first side wall 1143 or the second side wall 1144 can be provided with a vent hole 1145 communicating with the installation cavity 1141 , water vapor can enter the installation cavity 1141 through the vent hole 1145 , and then can be absorbed by the drying component 12 .

More specifically, the plurality of side walls 1142 may further include a third side wall 1146 and a fourth side wall 1147 connecting the first side wall 1143 and the second side wall 1144, the third side wall 1146 may be connected to the second sub-arm 1122, The fourth side wall 1147 can be connected to the fourth sub-arm 1132 ; alternatively, both the second sub-arm 1122 and the fourth sub-arm 1132 can be connected to the first side wall 1143 .

Please refer to Figure 5 and Figure 9, the drying assembly 12 can be installed in the installation cavity 1141, and can absorb water vapor, water droplets, etc., the drying assembly 12 can communicate with the battery cavity 21 formed by the box body 20, and can absorb the The water vapor and water droplets generated in the battery pack 100 make the water vapor in the battery pack 100 less or no water vapor, so that the battery pack 100 is not easy to condense, which ensures the safety performance of the battery pack 100 .

Further, the drying assembly 12 is detachably clamped in the installation cavity 1141, so that the drying assembly 12 can be disassembled more conveniently, and a new drying assembly 12 can be replaced in time after the drying assembly 12 has been used for a long time or the drying assembly 12 has expired. , so that the long-term reliability of the anti-condensation performance of the battery pack 100 can be ensured, and the safety performance of the battery pack 100 can be further improved.

Specifically, referring to FIGS. 12 to 14 , the drying assembly 12 may include a desiccant 121 and a housing 122 . The desiccant 121 can be used to absorb water vapor or water droplets. Wherein, the desiccant 121 can be a physical desiccant, which physically absorbs water vapor or water droplets. For example, the desiccant 121 can be silica gel, activated alumina, etc.; For example, the desiccant 121 can be calcium oxide, calcium chloride, soda lime and the like. The desiccant 121 can be in the shape of spherical particles, cubes and the like. Certainly, the desiccant 121 is not limited to the type described in this embodiment, and may be other types.

The casing 122 can be provided with a receiving cavity 1221 , and the receiving cavity 1221 can be used to store the desiccant 121 . The housing 122 is detachably snapped into the installation cavity 1141 to facilitate the detachment of the drying assembly 12 . For example, the housing 122 can be provided with buckles, and the inner surface of the installation cavity 1141 can be provided with a slot; or, the housing 122 can be provided with a slot, and the inner surface of the installation cavity 1141 can be provided with a buckle; Cooperate to clamp the housing 122 in the installation cavity 1141 .

Please continue to refer to FIG. 12 to FIG. 14 , the housing 122 may include a first sub-shell 1222 and a second sub-shell 1224 . The first sub-shell 1222 can be provided with a first sub-cavity 1223 , the first sub-cavity 1223 can be a part of the receiving cavity 1221 for storing at least part of the desiccant 121 , and one side of the first sub-cavity 1223 is open. The first sub-housing 1222 can be engaged with the installation cavity 1141 so that the first sub-housing 1222 can be disassembled from the installation cavity 1141 , and at the same time the first sub-housing 1222 can also be more firmly installed in the installation cavity 1141 and not easy to come off.

Please refer to Fig. 8 , the two sides of the first sub-shell 1222 are provided with buckles 12221, the surface of the installation cavity 1141 opposite to the two sides of the first sub-shell 1222 is formed with a slot 11411, and the buckle 12221 can be snapped into the slot 11411 Inside, when the first sub-shell 1222 needs to be disassembled from the installation cavity 1141, the buckle 12221 can be disengaged from the slot 11411, and then the first sub-shell 1222 can be taken out. Certainly, in other embodiments, the two sides of the first sub-case 1222 may also be provided with locking grooves, and the surfaces of the installation cavity 1141 opposite to the two sides of the first sub-housing 1222 may be formed with buckles.

Please refer to Fig. 8, Fig. 12 to Fig. 14, in some embodiments, the first sub-shell 1222 can also include a clamping part 12222, and the user can take out or put the first sub-shell 1222 into the installation cavity by pinching the clamping part 12222 1141. When the first sub-housing 1222 is placed in the installation cavity 1141, the entire clamping part 12222 or a part of the clamping part 12222 can be exposed to the installation cavity 1141, so that the user can handle it easily. Furthermore, the clamping part 12222 can be provided with a frosted structure, bumps or grooves to increase the friction between the user and the clamping part 12222 when the user holds the clamping part 12222, prevent slipping when the user holds it, and improve the ease of disassembly. reliability.

The front wall and the rear wall of the first sub-shell 1222 can be provided with a plurality of ventilation holes 12223 , and water vapor can enter the first sub-shell 1222 through the ventilation holes 12223 and be absorbed by the desiccant 121 . At the same time, the diameter of the air hole 12223 may be smaller than that of the desiccant 121 , so that the desiccant 121 is not easy to escape from the air hole 12223 .

Wherein, the first sub-shell 1222 can be integrally formed by injection molding or other processes.

12 to 14, the second sub-cavity 1224 can be provided with a second sub-cavity 1225, the second sub-cavity 1225 can communicate with its first sub-cavity 1223, and the second sub-cavity 1225 can be shared with the first sub-cavity 1223 A receiving cavity 1221 is formed. It can be understood that a part of the desiccant 121 can be accommodated in the second sub-cavity 1225 . The second sub-case 1224 can extend into the first sub-cavity 1223 from the open side of the first sub-cavity 1223 and engage with the first sub-casing 1222, so that the second sub-casing 1224 and the first sub-casing 1222 can be disassembled. , the second sub-shell 1224 can also prevent the desiccant 121 from running out of the storage cavity 1221 .

The second sub-case 1224 can include a buckle 12241, and the first sub-case 1222 can be provided with a locking hole 12224, and the buckle 12241 can be snapped into the locking hole 12224, and the first sub-housing 1222 and the second sub-housing 1224 When disassembled, it is only necessary to push the buckle 12241 inward to make the buckle 12241 disengage from the hole 12224 . So that the first sub-case 1224 is detachably connected to the first sub-case 1222 . Of course, in other embodiments, the second sub-shell 1224 may also be provided with a locking hole, and the first sub-shell 1222 may include a buckle.

Wherein, the second sub-shell 1224 can be integrally formed by injection molding or other processes.

When the desiccant 121 has expired, or the desiccant 121 has been used for too long, or the desiccant 121 has absorbed more water, and the desiccant 121 needs to be replaced, the housing 122 and the desiccant 121 can be replaced together, or the housing 122 can be replaced. 122 is taken out and the desiccant 121 in the casing 122 is replaced, and then the casing 122 is put into the installation cavity 1141 again.

When assembling the drying assembly 12 , the specific process may be as follows: put a plurality of desiccants 121 into the first subcavity 1223 of the first subshell 1222 , and then snap the second subshell 1224 into the first subshell 1222 .

Please refer to Fig. 3, Fig. 5 and Fig. 7, in some embodiments, drying device 10 can also comprise explosion-proof valve 14, and explosion-proof valve 14 can be installed on the body 111, and explosion-proof valve 14 can communicate with battery cavity 21, and can be connected with The battery chamber 21 performs gas exchange, and the explosion-proof valve 14 can be used to prevent the explosion caused by the high air pressure in the battery pack 100 .

Specifically, referring to FIG. 9 , the body 111 can be provided with an escape hole 1116 that runs through the first surface 1111 and the second surface 1112, and at least part of the explosion-proof valve 14 can extend into the accommodation space 110 through the escape hole 1116. In this way, it can The volume of the drying device 10 is reduced, so that the structure of the drying device 10 is more compact. Simultaneously, because the storage space 110 communicates with the battery cavity 21, the explosion-proof valve 14 stretches into the storage space 110 and can increase the contact area between the explosion-proof valve 14 and the gas in the battery cavity 21, so that the explosion-proof valve 14 can play an explosion-proof effect better .

Wherein, the shape of the avoidance hole 1116 can be designed according to the shape of the explosion-proof valve 14, so that the contact area between the explosion-proof valve 14 and the gas in the battery cavity 21 is larger, so that the explosion-proof valve 14 can perform better gas exchange. In one embodiment, please refer to FIG. 9 , the plane shape of the avoidance hole 1116 can be fat "cross", and the gas can exchange gas with the explosion-proof valve from four tops, which increases the air contact area of the explosion-proof valve 14 .

Further, the explosion-proof valve 14 may include an explosion-proof valve body 141 and a gas-permeable film 142, the gas-permeable film 142 can wrap the explosion-proof valve body 141, the gas-permeable film 142 can be used for gas to permeate, and the internal and external air of the battery pack 100 can be controlled in the explosion-proof valve body 141. The water vapor that occurs during the exchange process can condense on the air-permeable membrane 142, and the air-permeable membrane 142 can extend into the accommodation space 110 so that the drying assembly 12 can better absorb the water vapor on the air-permeable membrane 142. It can be understood that the drying assembly 12 is close to the air-permeable membrane. Membrane 142 is provided.

Please refer to FIG. 3 , FIG. 5 and FIG. 6 , the explosion-proof valve body 141 can be connected to the body 111 by fasteners such as bolts and screws. Specifically, the body 111 can be provided with a first mounting hole 1117, the explosion-proof valve body 141 can be provided with a second mounting hole (not shown), and the bolt 143 can be penetrated through the second mounting hole and the first mounting hole 1117, so that the explosion-proof valve The body 141 is fixedly connected to the body 111 . Wherein, the first mounting hole 1117 may surround the avoidance hole 1116 , or be arranged in a dislocation with each leading end of the avoidance hole 1116 .

Further, in some implementations, the first arm 112 and the second arm 113 may cover part of the first installation hole 1117 , which may cause inconvenience when installing the bolt 143 . Therefore, the first arm 112 can open a first escape hole 1123, and the first escape hole 1123 can correspond to the first mounting hole 1117 blocked by the first arm 112, and the second arm 113 can open a second escape hole 1133 , the second avoidance hole 1133 can correspond to the first installation hole 1117 blocked by the second support arm 113, thus, the tool can be inserted into the first avoidance hole 1123 and the second avoidance hole 1133 to tighten the corresponding bolt 143 or Loosening operation makes it more convenient when explosion-proof valve 14 is installed. Specifically, the second sub-arm 1122 may be provided with a first avoidance hole 1123 , and the fourth sub-arm 1132 may be provided with a second avoidance hole 1133 .

Wherein, the aperture of the first escape hole 1123 can be greater than the aperture of the first installation hole 1117, the aperture of the second avoidance hole 1123 can be greater than the aperture of the second installation hole 1117, even the aperture of the first avoidance hole 1123 can be greater than that of the bolt 143 The neck length of the nut and the diameter of the second avoidance hole 1123 may be greater than the neck length of the nut of the bolt 143, so as to be more convenient for the user to operate.

In the description of this specification, references to the terms "certain embodiments," "one embodiment," "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples" To describe means that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of said features. In the description of the present application, "plurality" means at least two, such as two, three, unless otherwise specifically defined.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations, the scope of the present application is defined by the claims and their equivalents.

Claims (9)

1. A drying device (10) for a battery pack (100), characterized in that the drying device (10) comprises: The base (11) includes a body (111), a first arm (112), a second arm (113) and a tray (114), and one end of the first arm (112) is connected to the body (111) ) connection, the other end of the first arm (112) is connected to the tray (114), one end of the second arm (113) is connected to the body (111), the second arm The other end of (113) is connected to the tray (114), and the tray (114) is provided with an installation cavity (1141); and a drying assembly (12), detachably clamped in the installation cavity (1141), and used to absorb water vapor in the battery pack (100); The drying device (10) also includes an explosion-proof valve (14), the body (111) is provided with a through escape hole (1116), the body (111), the first arm (112), the The second arm (113) and the tray (114) together form a storage space (110), at least part of the explosion-proof valve (14) extends into the storage space (110) through the avoidance hole (1116). )Inside. 2. The drying device (10) according to claim 1, characterized in that, the tray (114) comprises spaced first side walls (1143) and second side walls (1144), and the first side walls The wall (1143) is closer to the body (111) than the second side wall (1144), and the first side wall (1143) and/or the second side wall (1144) is provided with a (1141) communicated air holes (1145). 3. The drying device (10) according to claim 1, characterized in that, the first arm (112) comprises a connected first sub-arm (1121) and a second sub-arm (1122), the The first sub-arm (1121) is connected with the body (111), the second sub-arm (1122) is connected with the tray (114), the first sub-arm (1121) is connected with the second sub-arm The angle formed by (1122) is an obtuse angle; The second arm (113) includes a connected third sub-arm (1131) and a fourth sub-arm (1132), the third sub-arm (1131) is connected to the body (111), the The fourth sub-arm (1132) is connected to the tray (114), and the angle formed by the third sub-arm (1131) and the fourth sub-arm (1132) is an obtuse angle. 4. The drying device (10) according to claim 1, characterized in that, the body (111) is provided with a sealing groove (1114), and the drying device (10) also includes a sealing ring (13), the The sealing ring (13) is installed in the sealing groove (1114) and protrudes from the body (111), and the sealing ring (13) is used to seal the gap between the body (111) and the external structure . 5. The drying device (10) according to claim 4, characterized in that, the sealing ring (13) comprises a sealing body (131) and a sealing protrusion (132) arranged on the sealing body (131), The sealing protrusion (132) is used to resist the inner surface of the sealing groove (1114). 6. The drying device (10) according to claim 4, characterized in that, the body (111) is also provided with a disassembly groove (1115) communicating with the sealing groove (1114), and the disassembly groove (1115) ) is located on the lower side of the sealing groove (1114), the sealing ring (13) includes a sealing main body (131) and a dismounting part (133) provided on the sealing main body (131), and the sealing main body (131) is installed on In the sealing groove (1114), the dismounting part (133) is installed in the dismounting groove (1115). 7. The drying device (10) according to claim 1, characterized in that, the drying assembly (12) comprises: desiccant (121); and The housing (122) is provided with a receiving cavity (1221) for storing the desiccant (121), and the housing (122) is clamped in the installation cavity (1141). 8. The drying device (10) according to claim 7, characterized in that, the housing (122) comprises: The first sub-shell (1222) is provided with a first sub-cavity (1223), and is used for clamping in the installation cavity (1141); and The second sub-cavity (1224) is provided with a second sub-cavity (1225), the first sub-cavity (1223) communicates with the second sub-cavity (1225) and jointly forms the storage cavity (1221), so The second sub-shell (1224) is engaged with the first sub-shell (1222). 9. A battery pack (100), characterized in that it comprises: A box (20), the box (20) is provided with a battery cavity (21) and a through hole (22) communicating with the battery cavity (21), and the battery cavity (21) is used to accommodate the battery; and The drying device (10) according to any one of claims 1-8, wherein the drying device (10) is installed in the box (20), and the drying component (12) passes through the through hole (22) It communicates with the battery cavity (21).

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