Battery water removal structure and battery pack

Abstract

To provide a battery dehydration structure and a battery pack capable of removing gaseous water in a battery housing, keeping the inside of the battery housing in a predetermined dry state, improving service life of a battery, and reducing risk of thermal runaway of the battery.SOLUTION: A first case of a battery dehydration structure is provided with a first mounting region 110 for mounting a battery unit and a water vapor deposition region 120 provided with a second mounting region 122. A drying assembly 200 is provided in the second mounting region to remove water vapor of the battery unit. The first case is provided with a region where the largest amount of water vapor is deposited as a water vapor deposition region. The water vapor deposition region is provided with a second mounting region. The second mounting region is provided with a drying assembly. The drying assembly absorbs the water vapor of the battery unit, so that gaseous water in a battery housing can be removed, and the inside of the battery housing can be maintained in a predetermined dry state.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to the field of battery technology, and more particularly to a battery water removal structure and a battery pack. [Background technology]

[0002] With the development of battery technology, batteries are becoming increasingly widely used in electric vehicles, and moisture-proof protection of batteries has become one of the important safety indicators for batteries. Currently, conventional battery waterproofing measures typically use waterproof vents, which can block liquid water but cannot block gaseous water. During normal use of a battery, a pressure difference occurs between the inside and outside of the battery case, allowing humid gas from the outside to enter the battery case. If the humidity inside the case is too high, the temperature difference inside the case will cause the gaseous water to condense into liquid water, which will then accumulate inside the case.

[0003] In the prior art, water vapor entering the casing can cause metal corrosion and other dangerous reactions in the battery, and the internal temperature of the battery varies significantly during daily use. Such large temperature differences can accelerate related chemical reactions within the battery, increasing the risk of thermal runaway. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of this, to address the problems present in batteries in the prior art, it is necessary to provide a battery water removal structure and battery pack that can remove gaseous water from within a battery casing, maintain the interior of the battery casing in a predetermined dry state, improve the service life of the battery, reduce the risk of thermal runaway in the battery, and have a simple structure that is easy to install. [Means for solving the problem]

[0005] According to a first aspect, the present application provides a battery water removal structure, including a first case provided with a first mounting area for mounting a battery unit and a water vapor deposition area in which a second mounting area is provided, and a desiccant assembly provided in the second mounting area.

[0006] In one embodiment, the desiccant assembly includes a desiccant having a first opening at a first end and a second end at the second mounting area, the desiccant having a storage chamber and a through-hole unit, the storage chamber communicating with the through-hole unit and the first opening, respectively, and the storage chamber being used to store a desiccant.

[0007] In one embodiment, the desiccant assembly further includes a first cover removably disposed on the first end of the desiccant.

[0008] In one embodiment, the first cover has a first male thread and the first end of the desiccant has a first female thread, and the first cover is connected to the first female thread at the first end of the desiccant by the first male thread.

[0009] In one embodiment, a mounting interface is provided in the second mounting region, and the second end of the desiccant is removably mounted to the mounting interface.

[0010] In one embodiment, the battery water removal structure further includes a sealant disposed between the second end of the desiccant and the mounting interface.

[0011] In one embodiment, the mounting interface is provided with a second female thread, the second end of the desiccant is provided with a second male thread, and the second end of the desiccant is connected to the second female thread of the mounting interface by the second male thread.

[0012] In one embodiment, the first case is provided with a cooling assembly for dissipating heat from the battery unit, the cooling assembly including a plurality of cooling passages, each of which is connected to one another, and the second mounting area has at least one cooling passage.

[0013] In one embodiment, a relief is provided in the cooling passage adjacent the mounting interface, the relief communicating with the mounting interface, the relief containing a desiccant. avoid It is used for this purpose.

[0014] According to a second aspect, the present application provides a battery pack including a battery unit and any one of the above-described battery water removal structures, wherein the battery unit is provided in the battery water removal structure. [Effects of the Invention]

[0015] One of the above technical solutions has the following advantages and beneficial effects:

[0016] The above-mentioned battery water removal structure includes a first case and a dryer assembly, the first case having a first mounting area and a water vapor accumulation area, the first mounting area being used to mount a battery unit, a second mounting area being provided in the water vapor accumulation area, and a dryer assembly being provided in the second mounting area to remove water vapor from the battery unit. The present application provides a water vapor accumulation area in the first case where the most water vapor accumulates, a second mounting area being provided in the water vapor accumulation area, and a dryer assembly being provided in the second mounting area. The dryer assembly absorbs water vapor from the battery unit, thereby removing gaseous water from within the battery housing and maintaining a predetermined dry state within the battery housing, thereby improving the battery's service life and reducing the risk of thermal runaway in the battery. Furthermore, once the dryer assembly has saturated with water, the dryer assembly can be replaced from the first case, eliminating the need to remove the battery unit, simplifying the structure and improving installation convenience. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 2 is a structural schematic diagram of a first angle of a battery water removal structure in an embodiment of the present application. [Figure 2] 1 is a schematic exploded view of the first angle of the water removal structure for a battery according to an embodiment of the present application. FIG. [Figure 3] 1 is a schematic exploded view of the second angle of the water removal structure for a battery according to an embodiment of the present application. FIG. [Figure 4]FIG. 2 is a structural schematic diagram of a first angle of the drying assembly in an embodiment of the present application. [Figure 5] FIG. 10 is a structural schematic diagram of a second angle of the drying assembly in an embodiment of the present application. [Figure 6] 1 is a schematic cross-sectional view of a battery water removal structure according to an embodiment of the present invention. [Figure 7] FIG. 7 is a partially enlarged structural schematic diagram of a portion A in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0018] In order to allow those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, not all of the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative efforts will fall within the scope of protection of the present application.

[0019] In addition, terms such as "first," "second," etc. in the specification, claims, and drawings of this application are used to distinguish between similar objects and are not necessarily used to describe a specific order or chronological order. It should be understood that interchanges of data used in this manner, when appropriate, facilitate the description of embodiments of this application. In addition, the terms "comprise," "have," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or facility comprising a series of steps or units is not necessarily limited to those explicitly listed steps or units, but may include other steps or units not explicitly listed or inherent in the process, method, product, or facility.

[0020] In this application, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" are based on the orientations or positional relationships shown in the drawings. These terms are primarily intended to better describe the application and its embodiments, and are not intended to limit the indicated devices, elements, or components to necessarily have a specific orientation or to be constructed or operated in a specific orientation.

[0021] Furthermore, some of the above terms may be used to express other meanings in addition to expressing orientation or positional relationships, for example, the term "on" may be used to express a certain dependency or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the present application according to specific circumstances.

[0022] Also, the term "plurality" means two or more.

[0023] In addition, unless there is a contradiction, the embodiments and features of the embodiments in the present application can be combined with each other. The present application will be described in detail below in conjunction with the embodiments with reference to the drawings.

[0024] In one embodiment, as shown in Figures 1 to 3, a battery water removal structure is provided, which includes a first case 100 and a dryer assembly 200, wherein the first case 100 has a first mounting area 110 and a water vapor accumulation area 120, the first mounting area 110 is used to mount a battery unit, the water vapor accumulation area 120 has a second mounting area 122, and the dryer assembly 200 is mounted in the second mounting area 122.

[0025] Here, the battery unit may include multiple cells, and the cells may be connected in series and / or parallel. The cells may be lithium-ion cells, and the cells may be rectangular or cylindrical. The battery unit may be installed in a housing to form a battery pack. The first case 100 may be part of the housing. For example, the housing may include a side panel unit, a top cover, and a bottom panel, and the first case 100 may be the bottom panel of the housing. In another example, the first case 100 may be the side panel or top cover of the housing. The first case 100 may be a structure independent of the housing. For example, the first case 100 may be a cooling plate with a cooling function, and the first case 100 may be installed in the housing. For example, the first case 100 may be installed at the bottom of the housing. The installation position of the first case 100 may be determined based on the side on which the most water vapor accumulates when the battery unit is installed in the housing.

[0026] The first case 100 may have a rectangular structure. For example, the battery housing may be polygonal or irregular. The first case 100 may be made of a metal or non-metallic material. The first case 100 has a first plate surface and a second plate surface, with the first plate surface facing the second plate surface. A first mounting area 110 is provided on the first plate surface of the first case 100. The first mounting area 110 is used to mount and install a battery unit. For example, the first mounting area 110 may be used to attach to one side of the battery unit or to support the battery unit. For example, a plurality of positioning grooves may be provided in the first mounting area 110. The battery unit may be divided into a plurality of battery modules. The battery modules may include a plurality of cells. The positioning grooves may be used to position and fix the battery modules. A water vapor accumulation region 120 is further provided on the first plate surface of the first case 100. The water vapor accumulation region 120 refers to the region where the most water vapor accumulates when the battery unit is installed in the housing. For example, the water vapor accumulation region 120 is provided near the periphery of the first mounting region 110.

[0027] A second attachment area 122 may be provided in the water vapor deposition area 120, and the second attachment area 122 is used to attach and provide the desiccant assembly 200. The size of the second attachment area 122 is smaller than the size of the water vapor deposition area 120, and for example, the second attachment area 122 may be provided in the center of the water vapor deposition area 120. The desiccant assembly 200 may be provided in the second attachment area 122 by means such as threading or engagement, and the desiccant assembly 200 can be used to absorb and dry water vapor condensed in the water vapor deposition area 120.

[0028] For example, when water vapor increases within the battery unit housing, the water vapor condenses in the water vapor accumulation region 120, and the desiccant assembly 200 in the water vapor accumulation region 120 absorbs the condensed water vapor in the water vapor accumulation region 120, thereby reducing the humidity within the battery unit housing, keeping the battery unit housing dry, reducing the risk of dangerous reactions in the battery unit due to metal corrosion within the housing caused by water vapor, and reducing the risk of thermal runaway. After the desiccant assembly 200 has absorbed water, the user can replace it by removing it and attaching it to the second attachment region 122 of the first case 100 to continue absorbing water vapor in the water vapor accumulation region 120, thereby eliminating the need to remove the battery unit and greatly improving the convenience of replacing the desiccant assembly 200.

[0029] In the above embodiment, the first case 100 is provided with a first mounting area 110 and a water vapor accumulation area 120, the first mounting area 110 is used to mount the battery unit, the water vapor accumulation area 120 is provided with a second mounting area 122, and the desiccant assembly 200 is provided in the second mounting area 122, thereby realizing the removal of water vapor from the battery unit. In the present application, the area of ​​the first case 100 where the most water vapor accumulates is provided as a water vapor accumulation area 120, and a second mounting area 122 is provided in the water vapor accumulation area 120. A dryer assembly 200 is provided in the second mounting area 122, and by using the dryer assembly 200 to absorb water vapor from the battery unit, gaseous water can be removed from the battery housing, and the inside of the battery housing can be maintained in a predetermined dry state, thereby improving the battery's service life and reducing the risk of thermal runaway in the battery. Furthermore, after the dryer assembly 200 has absorbed water and is saturated, it can be replaced from the first case 100, eliminating the need to remove the battery unit, simplifying the structure and improving installation convenience.

[0030] In one embodiment, as shown in Figures 4 and 5, the desiccant assembly 200 includes a desiccant 210 having a first opening 212 at a first end and a second end in the second mounting area 122, the desiccant 210 having a storage chamber 214 and a through-hole unit 216, the storage chamber 214 communicating with the through-hole unit 216 and the first opening 212, respectively, and the storage chamber 214 used to store a desiccant.

[0031] Here, the desiccant assembly 200 may include at least one desiccant 210, which may have a hollow tubular structure. The desiccant 210 has a first end and a second end, the first end facing the second end. A first opening 212 is provided at the first end of the desiccant 210, and a storage chamber 214 is provided inside the desiccant 210. The first opening 212 is in communication with the storage chamber 214, and the storage chamber 214 can be used to store a desiccant, which can be used to absorb water vapor condensed in the water vapor deposition region 120. For example, when the first opening 212 is in an open state, a user can place a desiccant in the storage chamber 214 or replace the desiccant in the storage chamber 214. Note that, in one example, the desiccant may be, but is not limited to, montmorillonite, silica gel, or calcium chloride. In another example, the desiccant may be an HCCF desiccant (humidity control material).

[0032] The second end of the desiccant 210 can be attached to the second mounting area 122 by means such as threading or engagement, thereby attaching and fixing the desiccant 210. When the desiccant in the desiccant 210 needs to be replaced, the second end of the desiccant 210 can be detached from the second mounting area 122, allowing the desiccant 210 to be removed, and the user can open the first opening 212 to easily replace the desiccant in the storage chamber 214 of the desiccant 210. A through-hole unit 216 is provided on the side of the desiccant 210, and the through-hole unit 216 communicates with the storage chamber 214. The through-hole unit 216 allows water vapor to easily enter the storage chamber 214, allowing the desiccant to absorb water vapor. For example, the through-hole unit 216 may include a plurality of first through-holes, each of which may be spaced apart to be arranged in an array on the side of the desiccant 210, so that the water vapor condensed in the water vapor accumulation region 120 can enter the storage chamber 214 from multiple directions simultaneously, thereby allowing the desiccant to easily absorb water vapor and improving the water vapor absorption efficiency.

[0033] In one embodiment, as shown in FIGS. 4 and 5, the desiccant assembly 200 further includes a first cover 240 removably disposed on a first end of the desiccant 210 .

[0034] Here, the first cover 240 can be used to cap the first end of the desiccant 210, thereby sealing the first opening 212 of the desiccant 210 and preventing the desiccant in the storage chamber 214 of the desiccant 210 from being exposed through the first opening 212 during use.

[0035] The first cover 240 may be removably attached to the first end of the desiccant 210, for example, the first cover 240 may be attached to the first end of the desiccant 210 by means such as threading or engagement.

[0036] When the desiccant in the desiccant 210 needs to be replaced, the second end of the desiccant 210 can be detached from the second mounting area 122 to remove the desiccant 210. Next, the first cover 240 can be removed from the first end of the desiccant 210, leaving the first opening 212 of the desiccant 210 open, allowing the user to replace the desiccant in the storage chamber 214 of the desiccant 210. After the replacement of the desiccant in the desiccant 210 is completed, the first cover 240 can be reattached to the first end of the desiccant 210, and the second end of the desiccant 210 with the first cover 240 attached can be attached to the second mounting area 122 to attach and secure the desiccant 210. After the desiccant assembly 200 has absorbed water and is saturated, the desiccant can be quickly replaced from the first case 100 without the need to remove the battery unit or the first case 100, which simplifies the structure and improves installation convenience.

[0037] In one embodiment, as shown in Figures 4 and 5, the first cover 240 has a first male thread 242, the first end of the desiccant 210 has a first female thread 220, and the first cover 240 is connected to the first female thread 220 at the first end of the desiccant 210 by the first male thread 242.

[0038] Here, the first external thread 242 is matingly connected to the first internal thread 220 .

[0039] The first end of the desiccant 210 has an open structure, a first female thread 220 is provided on the inner wall of the first end of the desiccant 210, and the first cover 240 has a first male thread 242 that matches and connects to the first female thread 220, so that the first cover 240 is attached to the first end of the desiccant 210 by a threaded fastening means.

[0040] When it is necessary to replace the desiccant in the desiccant 210, the second end of the desiccant 210 can be removed by detaching the second end of the desiccant 210 from the second mounting area 122, and then the first cover 240 can be rotated to disengage the first female thread 220 of the first cover 240 from the first male thread 242 of the desiccant 210, i.e., the first cover 240 can be removed from the first end of the desiccant 210, and the first opening 212 of the desiccant 210 will be in an open state, allowing the user to replace the desiccant in the storage chamber 214 of the desiccant 210. Thus, after the desiccant assembly 200 is saturated with water, the saturated desiccant in the storage chamber 214 of the desiccant 210 can be replaced by removing the first cover 240, which reduces replacement costs and does not require removal of the battery unit or the first case 100, thereby simplifying the structure and improving installation convenience.

[0041] In one embodiment, as shown in FIGS. 2 and 3, second attachment region 122 is provided with attachment interface 124 and the second end of desiccant 210 is removably attached to attachment interface 124 .

[0042] Here, the mounting interface 124 can be used to mount and secure the second end of the desiccant 210 .

[0043] By providing the mounting interface 124 in the second mounting region 122, the second end of the desiccant 210 can be attached and fixed to the mounting interface 124 of the second mounting region 122. The second end of the desiccant 210 can be removably attached to the mounting interface 124 by means of screwing or engagement, etc. When the desiccant in the desiccant 210 needs to be replaced, the second end of the desiccant 210 can be removed from the mounting interface 124 of the second mounting region 122 to remove the desiccant, and the desiccant in the desiccant 210 can be replaced. After the replacement of the desiccant in the desiccant 210 is completed, the second end of the desiccant 210, after the first cover 240 is attached, is attached to the mounting interface 124 of the second mounting region 122 to attach and fix the desiccant 210, thereby realizing quick replacement of the desiccant in the desiccant 210 without removing the battery unit or the first case 100, thereby simplifying the structure and improving installation convenience.

[0044] For example, a battery pack having a battery dewatering structure can be applied to a vehicle (e.g., a new energy vehicle), and the amount of water absorption required by the desiccant within a predetermined maintenance mileage of the vehicle can be preset. After the desiccant in the desiccant 210 is saturated with water, during the maintenance stage, the desiccant 210 is removed from the mounting interface 124 of the second mounting area 122, and the first cover 240 is opened to replace the desiccant in the storage chamber 214 of the desiccant 210. After the replacement, the first cover 240 is fastened, and the second end of the desiccant 210 is re-fixed to the mounting interface 124 of the second mounting area 122, so as to continue absorbing water vapor within the housing of the battery unit.

[0045] In one embodiment, as shown in FIGS. 6 and 7, the battery water removal structure further includes a sealant 300 disposed between the second end of the desiccant 210 and the mounting interface 124 .

[0046] Here, the sealant 300 may be a silica gel seal ring. By providing the sealant 300 between the second end of the desiccant 210 and the mounting interface 124, when the second end of the desiccant 210 is mounted to the mounting interface 124, the connection gap between the second end of the desiccant 210 and the mounting interface 124 can be sealed, preventing external water vapor from entering the battery unit housing through the connection gap.

[0047] In one embodiment, as shown in Figures 3, 4, and 5, the mounting interface 124 is provided with a second female thread 130, the second end of the desiccant 210 is provided with a second male thread 230, and the second end of the desiccant 210 is connected to the second female thread 130 of the mounting interface 124 by the second male thread 230.

[0048] Here, the second external thread 230 is matingly connected to the second internal thread 130 .

[0049] The mounting interface 124 is a through-hole provided in the second mounting region 122, the second female thread 130 is provided on the inner wall of the mounting interface 124, and the second male thread 230 is provided on the outer wall of the second end of the desiccant 210. For example, the first end of the desiccant 210 is inserted into the mounting interface 124 along the direction from the first plate surface to the second plate surface of the first case 100, and the second end of the desiccant 210 is connected to the second female thread 130 of the mounting interface 124 by the second male thread 230, thereby achieving the second end of the desiccant 210 being fastened to the mounting interface 124 and mounted.

[0050] When the desiccant in the desiccant 210 needs to be replaced, the user simply rotates the second end of the desiccant 210 to disengage the second male screw 230 at the second end of the desiccant 210 from the second female screw 130 at the mounting interface 124, removes the second end of the desiccant 210 from the mounting interface 124 of the second mounting area 122, and then easily removes the desiccant 210. Next, the user rotates the first cover 240 and removes the first cover 240 from the first end of the desiccant 210, allowing the user to replace the desiccant in the storage chamber 214 of the desiccant 210 without having to remove the battery unit or the first case 100, which simplifies the structure and improves installation convenience.

[0051] In one embodiment, as shown in Figures 1 and 2, the first case 100 is provided with a cooling assembly 140 for dissipating heat from the battery unit, the cooling assembly 140 includes a plurality of cooling passages 142, each of which is connected to one another, and the second mounting area 122 has at least one cooling passage 142.

[0052] Here, the cooling assembly 140 may be a liquid-cooled plate assembly, which can be used to cool and dissipate heat from the battery unit, lower the internal temperature of the battery unit, and reduce the risk of thermal runaway in the battery. The cooling passage 142 may have a plate-like structure, which can be used to transport a coolant (e.g., cooling water). The cooling passage 142 can be attached to one side of the battery unit to cool and dissipate heat from the battery unit. Exemplarily, the cooling passages 142 can be distributed on the first plate surface of the first case 100. For example, a plurality of cooling passages 142 can be provided in the first mounting region 110, at least one cooling passage 142 can be provided in the water vapor deposition region 120, and at least one cooling passage 142 can be located in the second mounting region 122, which can increase the space of the first mounting region 110 and allow the first case 100 to accommodate a plurality of battery units.

[0053] In one example, as shown in FIGS. 1 and 2, a recess 144 is provided in the cooling passage 142 adjacent to the mounting interface 124, the recess 144 is in communication with the mounting interface 124, and the recess 144 accommodates the desiccant 210. avoid It is used for this purpose.

[0054] For example, at least one cooling passage 142 is adjacent to the mounting interface 124. To avoid shadowing of the mounting interface by the cooling passage 142, the cooling passage 142 adjacent to the mounting interface 124 should be provided with a relief.

[0055] By providing a recess 144 in the cooling passage 142 adjacent to the mounting interface 124, the recess 144 communicates with the mounting interface 124, and the cooling passage 142 does not block the mounting interface 124. When the desiccant 210 is installed, the first end of the desiccant 210 is inserted into the mounting interface 124, and the recess 144 allows the desiccant 210 to be secured by the recess 144. Avoid The desiccant 210 can be positioned within the second mounting area 122, and the second end of the desiccant 210 can be threaded into the mounting interface 124, so that the second end of the desiccant 210 can be fastened and mounted to the mounting interface 124, thereby realizing the fastening and mounting of the desiccant 210.

[0056] In one embodiment, there is further provided a battery pack including a battery unit and any one of the above-mentioned battery water removal structures, wherein the battery unit is mounted in the battery water removal structure.

[0057] Here, the battery unit is provided in the battery moisture removal structure, which is used to support the battery unit, and which can also absorb water vapor inside the housing of the battery unit.

[0058] For a specific description of the battery water removal structure, please refer to the specific description of the battery water removal structure in the above embodiment, and no further description will be given here.

[0059] Specifically, the battery water removal structure includes a first case and a desiccator assembly, the first case having a first mounting area and a water vapor accumulation area, the first mounting area being used to mount the battery unit, a second mounting area being provided in the water vapor accumulation area, and a desiccator assembly being provided in the second mounting area to absorb and dry the water vapor in the water vapor accumulation area and remove the water vapor from the battery unit. The present application provides the area of ​​the first case where the most water vapor accumulates as the water vapor accumulation area, a second mounting area being provided in the water vapor accumulation area, and a desiccator assembly being provided in the second mounting area. The desiccator assembly absorbs the water vapor from the battery unit, thereby removing gaseous water from within the battery housing and maintaining a predetermined dry state within the battery housing, thereby improving the battery's service life and reducing the risk of thermal runaway in the battery. Furthermore, once the desiccator assembly has saturated with water, the desiccator assembly can be replaced from the first case, eliminating the need to remove the battery unit, simplifying the structure and improving installation convenience.

[0060] It should be noted that the battery pack may further include components such as a BMS, and specifically, the battery pack may include more components than those described in the above examples, or may combine certain components, or may have a different component arrangement.

[0061] The technical features of the embodiments described above can be combined in any way, and for the sake of simplicity, not all possible combinations of the technical features in the above embodiments have been described. However, these technical features should all be considered to be within the scope described in this specification unless they are inconsistent.

[0062] The above-described embodiments merely represent some embodiments of the present application, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the present invention. It should be noted that those skilled in the art may make some modifications and improvements without departing from the spirit of the present application, and all of these fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the scope of the claims. [Explanation of symbols]

[0063] 100 First Case 110 First mounting area 120 Water vapor deposition region 122 Secondary Mounting Area 124 Mounting Interface 130 Second female thread 140 Cooling Assembly 142 Cooling passage 144 Relief 200 Drying Assembly 210 Dry material 212 First Opening 214 Containment Room 216 Through-hole unit 220 First female thread 230 Second male thread 240 First Cover 242 First male thread 300 Sealing material

Claims

1. A battery water removal structure, a first case provided with a first mounting area for mounting a battery unit and a water vapor deposition area in which a second mounting area is provided; a dryer assembly provided in the second mounting area; the desiccant assembly includes a desiccant having a first end with a first opening and a second end in the second mounting area, the desiccant having a storage chamber and a through-hole unit, the storage chamber communicating with the through-hole unit and the first opening, respectively, the storage chamber being used to store a desiccant; a mounting interface is provided in the second mounting region, and a second end of the desiccant is removably mounted to the mounting interface; a cooling assembly for dissipating heat from the battery unit is provided in the first case, the cooling assembly includes a plurality of cooling passages, the cooling passages are in communication with each other, and the second mounting area has at least one of the cooling passages; A battery water removal structure, characterized in that a relief portion is provided in the cooling passage adjacent to the mounting interface, the relief portion is connected to the mounting interface, and the relief portion is used to avoid the desiccant.

2. The battery water removal structure according to claim 1 , wherein the desiccant assembly further includes a first cover removably provided on a first end of the desiccant.

3. 3. The battery water removal structure according to claim 2, wherein the first cover is provided with a first male thread, the first end of the desiccant is provided with a first female thread, and the first cover is connected to the first female thread at the first end of the desiccant by the first male thread.

4. The battery water removal structure according to claim 1 , further comprising a sealant disposed between the second end of the desiccant and the mounting interface.

5. 2. The battery dewatering structure of claim 1, wherein the mounting interface is provided with a second female thread, the second end of the desiccant is provided with a second male thread, and the second end of the desiccant is connected to the second female thread of the mounting interface by the second male thread.

6. A battery pack including a battery unit and the battery water removal structure according to any one of claims 1 to 5, wherein the battery unit is provided in the battery water removal structure.

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