Drying device for battery pack and battery pack

Abstract

The utility model discloses a drying device for a battery pack and the battery pack, and relates to the technical field of battery packs, the device comprises a base and a bottom cover which are in threaded connection, the base is detachably installed on a box body of the battery pack, and the bottom cover faces inwards and enters the box body of the battery pack during installation; a drying agent mounting groove is formed in the middle of the base, a plurality of baffles are arranged on the circumference of the drying agent mounting groove in an upward extending mode, and external threads are arranged on the outer sides of the bottoms of the baffles; a transparent cover mounting groove is formed in the bottom surface of the middle position of the base, the transparent cover mounting groove is communicated with the drying agent mounting groove, a transparent cover is embedded into the transparent cover mounting groove, moisture test paper is embedded into the transparent cover, and the moisture test paper is in contact with a drying agent arranged in the drying agent mounting groove; the bottom cover is sleeved on the outer sides of all the baffles, and internal threads matched with the external threads are arranged on the inner side of the bottom of the bottom cover. The water absorption condition of the drying agent in the device can be observed at any time, and the drying agent after water absorption in the drying device can be quickly replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and particularly relates to a drying device for a battery pack and a battery pack. Background Art

[0002] The statements herein only provide the background art related to the utility model, and do not necessarily constitute the prior art.

[0003] With the development of new energy vehicles, electric vehicles, as a type of new energy vehicles, are rising rapidly. As the power source of electric vehicles, the safety design of battery packs has become the focus of research and development of major battery factories. During the design process of battery packs, the problem of condensation inside the packs needs to be considered, that is, liquid water often appears inside the battery packs due to temperature changes, which will affect the safety and insulation performance of the battery packs. At the same time, during the service life of the battery packs, moisture ingress into the battery packs also needs to be avoided. Excessive moisture will not only affect the safety and insulation performance of the battery packs, but also may lead to the risk of extreme thermal runaway. Currently, the main way to solve the problems of condensation and moisture inside the battery packs is to place absorbent foam or desiccants inside the packs. However, the existing methods are difficult to effectively reduce the moisture inside the packs (such as it is difficult to take out the moisture absorbed by the foam or desiccants), and it is also impossible to effectively observe the condensation situation inside the battery packs and deal with it in time, and there is still a risk of absorbent failure. Summary of the Utility Model

[0004] In view of the above problems and defects existing in the prior art, the utility model provides a drying device for a battery pack and a battery pack. The drying device is detachably installed on the battery pack box body, and the whole installation and disassembly are simpler and more convenient. The desiccant after absorbing water in the drying device can be quickly replaced, so as to take out the moisture inside the battery pack, keep the humidity inside the pack low, and avoid the condensation phenomenon due to temperature changes, ensuring the safety of the battery pack. Moreover, the water absorption situation of the desiccant in the device can be observed at any time, which is convenient for relevant personnel to understand the situation in time and replace the desiccant in time, avoiding the safety risk of absorbent failure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a drying device for a battery pack.

[0007] A drying device for a battery pack includes a base and a bottom cover connected by threads. The base is detachably installed on the box body of the battery pack, and when installed, the bottom cover faces inward and enters the box body of the battery pack.

[0008] A desiccant installation groove is provided at the middle position of the base. A plurality of baffles extend upward in a circular shape from the desiccant installation groove. External threads are provided on the outer sides of the bottoms of all the baffles. A transparent cover installation groove is provided on the bottom surface at the middle position of the base. The transparent cover installation groove communicates with the desiccant installation groove. A transparent cover is embedded in the transparent cover installation groove, and a moisture test paper is embedded in the transparent cover. The moisture test paper is in contact with the desiccant provided in the desiccant installation groove.

[0009] The bottom cover is sleeved on the outer sides of all the baffles. Internal threads matching the external threads are provided on the inner side of the bottom of the bottom cover.

[0010] In a further technical solution, a plurality of baffles are evenly arranged, and a first gap is provided between every two adjacent baffles.

[0011] In a further technical solution, the bottom cover is of a shell structure and is divided into upper and lower parts that are fixedly connected. The upper part is a conical shell, and the lower part is a cylindrical shell.

[0012] A plurality of second gaps are evenly provided on the peripheral side walls of the bottom cover, and the second gaps correspond to and match the first gaps one by one.

[0013] In a further technical solution, the bottoms of all the baffles are connected to each other, and continuous external threads are provided on the outer sides of the bottoms of all the baffles.

[0014] In a further technical solution, the transparent cover is made of a transparent material. A test paper avoidance groove is provided on the top surface at the middle position of the transparent cover, and the moisture test paper is embedded in the test paper avoidance groove.

[0015] In a further technical solution, insert installation holes are respectively provided on both sides of the base. Inserts pass through the insert installation holes to fixedly install the base on the box body of the battery pack.

[0016] In a further technical solution, a sealing strip installation groove is further provided on the top surface of the base, and a sealing strip is embedded in the sealing strip installation groove.

[0017] In a further technical solution, the sealing strip is in the shape of a bottle cap. The protruding part of the outer circumference of the sealing strip is embedded in the sealing strip installation groove. An opening is provided at the middle position of the sealing strip, and the sealing strip is sleeved on the outer side of the bottom of the bottom cover through the opening.

[0018] In a second aspect, the present utility model proposes a battery pack.

[0019] A battery pack includes a box body and the drying device for the battery pack described in the first aspect.

[0020] A dehumidification hole is provided on the box body. The bottom cover of the drying device faces inward and enters the box body of the battery pack through the dehumidification hole. The base of the drying device is detachably installed on the box body of the battery pack.

[0021] Further technical solution: the outer circumference of the sealing strip provided on the bottom cover is larger than the size of the dehumidification hole, and the sealing strip tightly covers the dehumidification hole.

[0022] Compared with the prior art, the present utility model has the following beneficial effects:

[0023] 1. The present utility model provides a drying device and a battery pack for a battery pack. The drying device is provided with a base, and the base is fixedly installed on the battery pack box body by inserting inserts, so that the drying device can be detachably installed on the battery pack box body, and the whole installation and disassembly are simpler and more convenient; a sealing strip is provided on the base to prevent moisture from entering during the installation and disassembly process; the base and the bottom cover are connected by threads, and the connection method is simple and the disassembly is convenient, so that relevant personnel can quickly replace the desiccant after absorbing water in the drying device, thereby taking out the moisture in the battery pack, keeping the humidity in the pack low, and preventing condensation from occurring due to temperature changes, ensuring the safety of the battery pack; the structure of the whole device is simple, the installation is convenient, the cost is low, it can be reused, the practicability is high, and it is convenient to promote.

[0024] 2. The drying device for a battery pack provided by the present utility model, through the design of the transparent cover, the moisture test paper and the base, can observe the color change of the moisture test paper from the outside through the transparent cover at any time, so as to understand the state and water absorption situation of the internal desiccant, so as to replace the desiccant regularly and in time, and avoid the safety risk of water absorption failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The specification drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0026] Figure 1 is a side view of the overall structure of the drying device for a battery pack according to the present utility model;

[0027] Figure 2 is a cross-sectional view of the overall structure of the drying device for a battery pack according to the present utility model;

[0028] Figure 3 is an exploded schematic view of the overall structure of the drying device for a battery pack according to the present utility model;

[0029] Figure 4 is a structural schematic view of the base in the drying device for a battery pack according to the present utility model;

[0030] Figure 5 is a cross-sectional view of the base in the drying device for a battery pack according to the present utility model;

[0031] Figure 6 It is a schematic structural diagram of the bottom cover in the drying device for a battery pack according to the present utility model;

[0032] Figure 7 It is a schematic structural diagram of the transparent cover in the drying device for a battery pack according to the present utility model.

[0033] Wherein, 1. Transparent cover; 1.1. Test paper avoidance groove; 2. Moisture test paper; 3. Base; 3.1. Insert installation hole; 3.2. Sealing strip installation groove; 3.3. Baffle; 3.4. External thread; 3.5. Desiccant installation groove; 3.6. Transparent cover installation groove; 4. Insert; 5. Sealing strip; 6. Bottom cover; 6.1. Conical shell; 6.2. Cylindrical shell; 6.3. Internal thread; 7. Desiccant. Detailed implementation manners

[0034] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0035] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] Embodiment 1

[0037] As Figure 1 and Figure 3 shown, this embodiment proposes a drying device for a battery pack, including a base 3 and a bottom cover 6 connected by threads, as well as a transparent cover 1, a moisture test paper 2, an insert 4, a sealing strip 5, and a desiccant 7. Among them, as Figure 4 and Figure 5As shown in the figure, a desiccant installation groove 3.5 is provided at the middle position of the base 3. A desiccant 7 is provided in the desiccant installation groove 3.5. A plurality of baffles 3.3 extend upward in a circular manner from the desiccant installation groove 3.5. The plurality of baffles 3.3 form a cavity for further fixing and placing the desiccant. In addition, external threads 3.4 are provided on the outer sides of the bottoms of all the baffles 3.3. The bottom cover 6 is sleeved on the outer sides of all the baffles 3.4. Internal threads 6.3 matching the external threads 3.4 are provided on the inner side of the bottom of the bottom cover 6. Through the above settings, the bottom cover is fastened by matching the internal threads with the external threads at the bottom of the base baffles, and the desiccant is fixed in the desiccant installation groove. Moreover, the base is detachably installed on the box body of the battery pack. When installed, the bottom cover faces inward and enters the box body of the battery pack. The desiccant fixed in the bottom cover absorbs the moisture inside the battery pack, thereby achieving the purpose of drying.

[0038] Further, as Figure 4 shown, insert installation holes 3.1 are respectively provided on both sides of the above-mentioned base 3. The insert 4 passes through the insert installation holes 3.1 to fixedly install the base 3 on the box body of the battery pack, thereby playing a role in strengthening the installation and fixation.

[0039] Through the above settings, the base is fixedly installed on the battery pack box body through the insert. The connection between the base and the bottom cover is a threaded connection. Its connection method is simple and the disassembly is convenient, which is convenient for relevant personnel to quickly replace the desiccant after absorbing water in the drying device, thereby taking out the moisture in the battery pack, making the humidity inside the pack low, and preventing the condensation phenomenon from occurring due to temperature changes, ensuring the safety of the battery pack.

[0040] Further, as Figure 4 shown, the bottoms of the plurality of baffles are connected to each other. Continuous external threads are provided on the outer sides of the bottoms of all the baffles. Moreover, the plurality of baffles are evenly arranged, and a first gap is provided between two adjacent baffles. As Figure 6 shown, the above-mentioned bottom cover is of a shell structure. The bottom cover 6 is divided into two fixedly connected upper and lower parts. The upper part is a conical shell 6.1, and the lower part is a cylindrical shell 6.2. The conical head of the conical shell in the upper part is used for later installation guidance. Moreover, a plurality of second gaps are evenly provided on the peripheral side walls of the bottom cover. The second gaps correspond to and match the first gaps one by one. Through this setting, a plurality of gaps are formed. These gaps serve as moisture absorption channels for the desiccant, facilitating the desiccant in the desiccant installation groove to absorb moisture.

[0041] In addition, as Figure 2 and Figure 5As shown in the figure, a transparent cover mounting groove 3.6 is provided on the bottom surface at the middle position of the above-mentioned base. The transparent cover mounting groove 3.6 communicates with the desiccant mounting groove 3.5. A transparent cover 1 is embedded in the transparent cover mounting groove 3.6 (the transparent cover can also be further fixedly installed by bonding or screwing, etc.). A moisture test paper 2 is embedded in the transparent cover 1, and the moisture test paper is in contact with the desiccant arranged in the desiccant mounting groove. Further, the transparent cover 1 is made of a transparent material (such as glass, plastic, etc.), such as Figure 2 and Figure 7 As shown in the figure, a test paper avoidance groove 1.1 is provided on the top surface at the middle position of the transparent cover 1. The moisture test paper 2 is embedded in the test paper avoidance groove 1.1. The other side of the moisture test paper is in contact with the desiccant, and it can display different colors according to the amount of moisture absorbed by the desiccant. Through the design of the above-mentioned transparent cover, moisture test paper and base, the color change of the moisture test paper can be observed from the outside through the transparent cover, so as to understand the state of the internal desiccant and replace the desiccant regularly or in time.

[0042] Further, a sealing strip mounting groove 3.2 is also provided on the top surface of the above-mentioned base. A sealing strip 5 is embedded in the sealing strip mounting groove 3.2. By setting the sealing strip, it is convenient to play a sealing role when the device is installed on the battery pack box body. Specifically, the sealing strip 5 is in the shape of a bottle cap. The protruding part of the outer circumference of the sealing strip is embedded in the sealing strip mounting groove. An opening is provided at the middle position of the sealing strip, and the sealing strip is sleeved on the outside of the bottom of the bottom cover through the opening. Through this setting, when the bottom cover is installed into the battery pack box body inward through the dehumidification hole on the box body, the size of the outer circumference of the sealing strip provided on the bottom cover matches the size of the dehumidification hole of the box body, so that the sealing strip is stuck into the dehumidification hole, thereby achieving a good sealing effect and effectively preventing water vapor / moisture from entering the battery pack box body.

[0043] Through the above settings, the drying device proposed by the present utility model can not only absorb moisture inside the battery pack, but also understand the state and water absorption situation of the desiccant through the transparent cover and test paper outside the battery pack, which is convenient for regular and timely replacement of the desiccant; the device is provided with inserts and sealing strips for strengthening fixation, which can ensure the reliability of the device installed on the battery pack box body. The structure of the whole device is simple, the installation is convenient, the cost is low, it can be reused, the practicability is high, and it is convenient to promote.

[0044] Embodiment 2

[0045] This embodiment proposes a battery pack, including a box body and the drying device for the battery pack proposed in Embodiment 1; wherein, a dehumidification hole is provided on the box body. The bottom cover of the drying device faces inward and enters the box body of the battery pack through the dehumidification hole. The base of the drying device is detachably installed on the box body of the battery pack, and the disassembly is simple and convenient, which is convenient for replacing the desiccant in the device.

[0046] Furthermore, the outer circumference of the sealing strip provided on the bottom cover is larger than the size of the dehumidification holes, and the sealing strip tightly covers the dehumidification holes, thereby achieving a good sealing effect and effectively preventing water vapor / moisture from entering the battery pack box body.

[0047] As another implementation manner, the outer circumference of the sealing strip provided on the bottom cover matches the size of the dehumidification holes, and the sealing strip can just be snapped into the dehumidification holes, thereby achieving a good sealing effect and effectively preventing water vapor / moisture from entering the battery pack box body.

[0048] Although the specific implementation manners of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A drying device for a battery pack, characterized in that: It includes a base and a bottom cover connected by threads, wherein the base can be detachably mounted on the box body of the battery pack, and when installed, the bottom cover faces inwards and enters the box body of the battery pack; A desiccant installation groove is provided in the middle of the base, and a plurality of baffles are provided on the circumference of the desiccant installation groove, and external threads are provided on the outer sides of the bottoms of all baffles; a transparent cover installation groove is provided on the bottom surface in the middle of the base, and the transparent cover installation groove is connected with the desiccant installation groove, a transparent cover is embedded in the transparent cover installation groove, a moisture test paper is embedded in the transparent cover, and the moisture test paper is in contact with the desiccant arranged in the desiccant installation groove; The bottom cover is sleeved on the outside of all baffles, and the inner side of the bottom of the bottom cover is provided with an internal thread matching the external thread.

2. The drying device for a battery pack according to claim 1, characterized in that: A plurality of baffles are evenly arranged, and a first gap is provided between every two baffles.

3. The drying device for a battery pack according to claim 2, characterized in that: The bottom cover is a shell structure, and the bottom cover is divided into two parts, an upper part and an lower part, which are fixedly connected, the upper part is a conical shell, and the lower part is a cylindrical shell; A plurality of second gaps are evenly arranged on the side walls around the bottom cover, and the second gaps are matched with the first gaps in a one-to-one correspondence.

4. The drying device for a battery pack according to claim 2, characterized in that: The bottoms of all the baffles are connected to each other, and the outer sides of the bottoms of all the baffles are provided with continuous external threads.

5. The drying device for a battery pack according to claim 1, characterized in that: The transparent cover is made of a transparent material, a test paper avoidance groove is arranged on the top surface at the middle position of the transparent cover, and the moisture test paper is embedded in the test paper avoidance groove.

6. The drying device for a battery pack according to claim 1, characterized in that: Insert mounting holes are respectively provided on both sides of the base, and the insert passes through the insert mounting holes to fix the base on the box body of the battery pack.

7. The drying device for a battery pack according to claim 1, characterized in that: A sealing strip installation groove is also provided on the top surface of the base, and a sealing strip is embedded in the sealing strip installation groove.

8. The drying device for a battery pack according to claim 7, characterized in that: The sealing strip is in the shape of a bottle cap, the outer circumferential protrusion of the sealing strip is embedded in the sealing strip installation groove, an opening is provided at the middle position of the sealing strip, and the sealing strip is sleeved on the outer side of the bottom of the bottom cover through the opening.

9. A battery pack, characterized in that: It comprises a box body and a drying device for a battery pack according to any one of claims 1 to 8; The box body is provided with a dehumidification hole, the bottom cover of the drying device faces inwards and enters into the box body of the battery pack through the dehumidification hole, and the base of the drying device is detachably mounted on the box body of the battery pack.

10. The battery pack according to claim 9, characterized in that: The outer circumference of the sealing strip arranged on the bottom cover is larger than the size of the dehumidification hole, and the sealing strip tightly covers the dehumidification hole.

Images