Remote monitoring device for parameters of flooded lead-acid storage battery

By introducing a heat dissipation component consisting of a wide heat pipe and a radiator into the battery monitoring device, combined with a ventilation system of air ducts and fan blades, the problem of shortened component lifespan caused by poor heat dissipation was solved, achieving stable operation and extended lifespan of the equipment.

CN223986604UActive Publication Date: 2026-03-10CHINA NUCLEAR POWER ENGINEERING COMPANY LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-24
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing battery monitoring devices suffer from poor heat dissipation during prolonged use, leading to a shortened lifespan of internal components and affecting the normal operation of the device.

Method used

The heat dissipation component, consisting of wide heat pipes and heat sinks, combined with the ventilation component consisting of air ducts, exhaust vents and fan blades, dissipates heat from the control motherboard through air circulation, thereby reducing the internal temperature of the device.

Benefits of technology

It effectively extends the service life of the monitoring device, improves the operational stability and reliability of the equipment, and ensures that internal components operate within a suitable temperature range.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a remote parameter monitoring device for a flooded lead-acid storage battery, which comprises a monitoring device shell and a control mainboard arranged in the monitoring device shell, and the monitoring device comprises a heat dissipation assembly and a ventilation assembly, the heat dissipation assembly comprises a wide heat pipe and a radiator connected with one end of the wide heat pipe, and the wide heat pipe is arranged above the control mainboard; the ventilation assembly comprises an air duct arranged in the monitoring device shell and an exhaust outlet formed in the monitoring device shell, one end of the air duct is connected with the exhaust outlet, and the end, connected with the radiator, of the wide heat pipe extends into the air duct; the ventilation assembly further comprises fan blades arranged at the air outlet and a driving motor for driving the fan blades. The wide heat pipe is arranged above the control main board, heat of the control main board is absorbed and conducted to the radiator, the driving motor drives the fan blades to rotate, airflow flowing towards the outside of the monitoring device is formed in the air channel, and therefore heat in the air channel is discharged out of the monitoring device, and heat dissipation of the monitoring device is completed.
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Description

TECHNICAL FIELD

[0001] The utility model relates to monitoring device field especially, it relates to a kind of rich liquid formula lead-acid battery parameter remote monitoring device. BACKGROUND

[0002] The battery parameter remote monitoring device is a kind of high-tech equipment for real-time monitoring the running state of battery. It can remotely collect the voltage, current, temperature, internal resistance and other key parameters of battery, and send these data to the monitoring center for analysis. Through these data, the system can evaluate the health status of battery, predict the remaining life of battery, and timely find potential safety hazards. This device usually contains sensors, data acquisition unit, communication module and monitoring software. The sensor is installed on the battery for real-time monitoring of the physical and chemical parameters of the battery. The data acquisition unit collects these information, and sends the data to the monitoring center through the communication module (such as RS485, TCP / IP, etc.). The monitoring software receives the data and provides a user interface so that the operation and maintenance personnel can remotely monitor the status of the battery, receive alarm information and perform necessary maintenance operations.

[0003] And the common battery monitoring device, once enable, it basically remains in the normal open state, and when the monitoring device is normally open, the temperature inside the device will be in a very high state after long time use, and when the internal heat dissipation is not carried out, the service life of the internal parts will be greatly shortened, and if the internal parts are damaged, it will affect the normal use of the monitoring device. UTILITY MODEL CONTENT

[0004] The utility model solves the problem of providing an improved rich liquid formula lead-acid battery parameter remote monitoring device.

[0005] The utility model provides a kind of rich liquid formula lead-acid battery parameter remote monitoring device, including monitoring device shell and the control mainboard being set in the monitoring device shell, the rich liquid formula lead-acid battery parameter remote monitoring device still includes heat dissipation component and ventilation component;The heat dissipation component includes wide heat pipe and the radiator being connected with one end of the wide heat pipe, the wide heat pipe is set in the upper of the control mainboard;The ventilation component includes the air duct being set in the monitoring device shell and the exhaust port being set on the monitoring device shell, one end of the air duct is connected with the exhaust port, one end of the wide heat pipe and the radiator is extended to the air duct, so that the radiator is located in the air duct;The ventilation component still includes the fan blade being set at the exhaust port and the drive motor of driving fan blade.

[0006] In some implementations, the ventilation component further includes an air inlet, the air inlet and the exhaust port are respectively arranged on the adjacent side walls of the monitoring device shell, and the other end of the air duct is connected with the air inlet.

[0007] In some implementations, the air inlet and the air outlet have the same diameter.

[0008] In some implementations, the heat dissipation components are configured in multiple groups, the ventilation components are configured in multiple groups, and the specific number of the ventilation components is the same as the specific number of the heat dissipation components.

[0009] In some implementations, the projected area of ​​the wide heat pipe on the control panel is greater than 90% of the area of ​​the control panel.

[0010] In some implementations, the remote monitoring device for parameters of the flooded lead-acid battery also includes a protective mesh cover, which is located at the vent; and the protective mesh cover is detachably connected to the housing of the monitoring device by a number of rivets.

[0011] In some implementations, the remote monitoring device for parameters of the flooded lead-acid battery also includes a data display electrically connected to the control motherboard, the data display being fixedly connected to the outside of the monitoring device housing.

[0012] In some implementations, the remote monitoring device for parameters of the flooded lead-acid battery also includes an alarm electrically connected to the control motherboard, the alarm being fixedly connected to the outside of the monitoring device housing.

[0013] In some implementations, the remote monitoring device for parameters of a flooded lead-acid battery also includes a battery interface electrically connected to the control motherboard, the battery interface being located at the bottom of the side wall of the monitoring device housing.

[0014] In some implementations, the remote monitoring device for parameters of a flooded lead-acid battery also includes a fixed foot pad and a movable handle. The fixed foot pad is disposed on the bottom outer surface of the monitoring device housing; the movable handle is fixedly connected to the outer side wall of the monitoring device housing.

[0015] The beneficial effects of this utility model are as follows: The remote monitoring device for parameters of a flooded lead-acid battery disclosed in this utility model absorbs the heat of the control board by placing a wide heat pipe above the control board and conducts it to the heat sink. One end of the wide heat pipe is also connected to the heat sink, which is also located in the air duct. The heat sink absorbs and conducts the heat from the wide heat pipe and dissipates it into the air duct. The fan blades are located at the exhaust port, and the drive motor drives the fan blades to rotate, so that an airflow is formed in the air duct and flows out of the monitoring device, thereby dissipating the heat in the air duct to the outside of the monitoring device, thus completing the heat dissipation of the monitoring device, effectively reducing the internal temperature of the monitoring device and extending the service life of the monitoring device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of the remote monitoring device for parameters of a flooded lead-acid battery provided in this embodiment of the utility model;

[0018] Figure 2 A side view of the remote monitoring device for parameters of a flooded lead-acid battery provided in an embodiment of this utility model.

[0019] Figure 3 An internal top view of the remote monitoring device for parameters of a flooded lead-acid battery provided in this embodiment of the utility model;

[0020] Figure 4 A schematic diagram of the internal structure of the remote monitoring device for parameters of a flooded lead-acid battery provided in this embodiment of the utility model;

[0021] Figure 5 for Figure 4 A magnified schematic diagram of part A of the remote monitoring device for parameters of a flooded lead-acid battery shown.

[0022] Figure 6 This is a schematic diagram of another side of the structure of the remote monitoring device for parameters of a flooded lead-acid battery provided in an embodiment of this utility model.

[0023] Reference numerals: 1. Monitoring device housing; 2. Data display; 3. Control button; 4. Moving handle; 5. Protective mesh cover; 6. Rivet; 8. Fixing feet; 9. Fixing sleeve; 10. Fixing plate; 11. Drive motor; 12. Transmission rod; 13. Arc-shaped fan blade; 14. Battery interface; 15. Control main board; 16. Wide heat pipe; 17. Air inlet; 18. Mounting sleeve; 19. Alarm; 20. Exhaust vent; 21. Air duct; 22. Radiator. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and, or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and, or collections thereof.

[0026] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the terms "and" and "or" as used in this specification and the appended claims refer to any combination of one or more of the associated listed items and all possible combinations, and include such combinations.

[0029] Please refer to the following: Figures 1 to 5 , Figure 1 A schematic diagram of the overall structure of the remote monitoring device for parameters of a flooded lead-acid battery provided in this embodiment of the utility model; Figure 2 A side view of the remote monitoring device for parameters of a flooded lead-acid battery provided in an embodiment of this utility model. Figure 3 An internal top view of the remote monitoring device for parameters of a flooded lead-acid battery provided in this embodiment of the utility model; Figure 4 A schematic diagram of the internal structure of the remote monitoring device for parameters of a flooded lead-acid battery provided in this embodiment of the utility model; Figure 5 forFigure 4 A magnified schematic diagram of part A of the remote monitoring device for parameters of a flooded lead-acid battery shown. Figure 6 This is a schematic diagram of another side of the structure of the remote monitoring device for parameters of a flooded lead-acid battery provided in an embodiment of this utility model.

[0030] This utility model discloses a parameter monitoring device for flooded lead-acid batteries, used for remote parameter monitoring of flooded lead-acid batteries. The monitoring device includes a monitoring device housing 1 and a control main board 15 disposed within the monitoring device housing 1. The remote parameter monitoring device for flooded lead-acid batteries also includes a heat dissipation component and a ventilation component. The heat dissipation component includes a wide heat pipe 16 and a radiator 22 connected to one end of the wide heat pipe 16, with the wide heat pipe 16 positioned above the control main board 15. The ventilation component includes an air duct 21 disposed within the monitoring device housing 1 and an exhaust port 20 disposed on the monitoring device housing 1. One end of the air duct 21 is connected to the exhaust port 20, and the end of the wide heat pipe 16 connected to the radiator 22 extends into the air duct 21, so that the radiator 22 is located within the air duct 21. The ventilation component also includes fan blades disposed at the exhaust port 20 and a drive motor 11 for driving the fan blades.

[0031] In this embodiment, due to prolonged use, the internal temperature of the monitoring device gradually increases to a certain level, which shortens the lifespan of the internal components. The temperature rise is most pronounced in the control motherboard 15, which also houses the most components. As the temperature of the control motherboard 15 rises, the generated heat dissipates upwards. By placing a wide heat pipe 16 above the control motherboard 15, the heat can be absorbed and conducted to the cooling end. The wide heat pipe 16 achieves heat transfer through the phase change of its internal working medium (e.g., from liquid to gas or vice versa). For example, at its heating end, the working fluid absorbs heat and evaporates into steam; at the cooling end, the steam releases heat and condenses back into a liquid state. The cooling end of the wide heat pipe 16 extends and penetrates into the air duct 21, and this cooling end is also connected to the radiator 22, which is also located within the air duct 21. The radiator 22 dissipates the heat conducted to the cooling end into the air duct 21. The position where the wide heat pipe 16 enters the air duct 21 is tightly connected to the side wall of the air duct 21 to prevent heat leakage from the air duct 21 into the space outside the air duct 21 and inside the monitoring device housing 1. The exhaust port 20 on the monitoring device housing 1 connects the ventilation duct 21 to the space outside the monitoring device. The fan blades at the exhaust port 20 can be arc-shaped fan blades 13, driven by the drive motor 11 to rotate, creating an airflow from the air duct 21 to the outside of the monitoring device, thereby dissipating the heat from the air duct 21 to the outside of the monitoring device, effectively reducing the internal temperature of the monitoring device and extending its service life.

[0032] Specifically, the monitoring device housing 1 is generally box-shaped, with its length and width both greater than its height. The housing 1 may include interconnected rectangular bottom, side, and top walls. The control board 15 is fixedly connected to the inside of the bottom wall, and the exhaust vent 20 is located on the side wall. The area of ​​the bottom wall is larger than the area of ​​the control board 15, so that the space above the bottom wall is larger than the space above the control board 15. The control board 15 can be located in the middle of the bottom wall. The projection of the air duct 21 onto the bottom wall is offset from the projection of the control board 15 onto the bottom wall; that is, there is no overlap between the projections of the air duct 21 and the control board 15. This maximizes the distance between the air duct 21 and the control board 15, preventing heat conducted through the wide heat pipe 16 from failing to dissipate in time due to unforeseen circumstances (such as the drive motor 11 malfunctioning), thus affecting the operation of the control board 15. The air duct 21 may also be made of a material with good thermal insulation properties to improve its thermal insulation performance.

[0033] In some embodiments, the ventilation assembly further includes a fixing sleeve 9, a fixing plate 10, and a transmission rod 12. The fixing sleeve 9 is fitted onto the exhaust port 20, and the fixing plate 10 is fixedly connected inside the fixing sleeve 9. The fixing plate 10 may be cross-shaped to avoid obstructing the exhaust port 20. A drive motor 11 is fixedly connected to the inner side of the fixing plate 10, and the transmission rod 12 is drively connected to the output shaft of the drive motor 11. Fan blades are fixedly connected to the end of the transmission rod 12 away from the drive motor 11.

[0034] In some embodiments, the ventilation assembly further includes an air inlet 17, which and the air outlet 20 are respectively disposed on adjacent side walls of the monitoring device housing 1, and the other end of the air duct 21 is connected to the air inlet 17.

[0035] Specifically, the air duct 21 can be arc-shaped, with one end connected to the air inlet 17 and the other end connected to the air outlet 20. When the fan blades at the air outlet 20 rotate to create airflow, new air will enter the air duct 21 from the air inlet 17, thus forming an air circulation within the air duct 21. This accelerates the airflow speed, thereby increasing the speed at which heat is expelled from the air duct 21, and ultimately improving the heat dissipation performance of the monitoring device to ensure its stable operation. The distance from the radiator 22 to the air outlet 20 is less than the distance from the radiator 22 to the air inlet 17, meaning the radiator 22 is positioned close to the air outlet 20 so that the heat conducted to the radiator 22 can be expelled from the air outlet 20 more quickly.

[0036] In some embodiments, the air inlet 17 and the air outlet 20 have the same ventilation diameter, and the entire air duct 21 has the same diameter, that is, the cross-sectional dimensions of the entire air duct 21 are basically the same, thereby maintaining a uniform airflow velocity within the air duct 21, reducing the noise generated by the airflow, and improving the user experience of the monitoring device.

[0037] In some embodiments, to further improve the heat dissipation performance of the monitoring device, multiple sets of heat dissipation components and multiple sets of ventilation components are provided, with the specific number of ventilation components being the same as the specific number of heat dissipation components.

[0038] The heat dissipation components and ventilation components can be configured into four groups. The four ventilation groups are arranged symmetrically around the center of the bottom wall, meaning the four air ducts 21 are positioned near the four corners of the housing 1 of the box-shaped monitoring device. Furthermore, the air inlets 17 and exhaust outlets 20 connected to adjacent air ducts 21 are axially symmetrically arranged, meaning that both air outlets on the same side wall are either air inlets 17 or both are exhaust outlets 20. This prevents hot air exhausted from the exhaust outlet 20 of one air duct 21 from re-entering the other air duct 21 through its air inlet 17 when two air ducts 21 are adjacent, thus avoiding impact on heat dissipation efficiency. Two of the four wide heat pipes 16 are axially symmetrically arranged with the other two, with their axis of symmetry being a center line of the control motherboard 15, thereby ensuring uniform heat dissipation from the control motherboard 15 by the wide heat pipes 16.

[0039] In some embodiments, the projected area of ​​the wide heat pipe 16 on the control panel is greater than 90% of the area of ​​the control panel, so as to ensure that the heat generated in each area of ​​the control motherboard 15 can be quickly and effectively conducted through the wide heat pipe 16, thereby further improving the heat dissipation performance of the monitoring device.

[0040] In some embodiments, the remote monitoring device for parameters of a flooded lead-acid battery further includes a protective mesh cover 5, which is disposed at the vent 20; and the protective mesh cover 5 is detachably connected to the housing 1 of the monitoring device by a number of rivets 6.

[0041] The protective mesh cover 5 prevents dust or particulate matter from entering the air duct 21 from outside the monitoring device, thus avoiding dust affecting heat dissipation performance and protecting internal components from damage by particulate matter. Furthermore, the protective mesh cover 5 can be removed for cleaning to prevent dust accumulation on it, which could impair heat dissipation.

[0042] In some embodiments, the remote monitoring device for flooded lead-acid battery parameters further includes a battery interface 14 electrically connected to the control motherboard 15. The battery interface 14 is located at the bottom of the side wall of the monitoring device housing 1. The battery interface 14 is electrically connected to a remote flooded lead-acid battery, thereby enabling the remote monitoring device for flooded lead-acid battery parameters to have the function of remotely monitoring flooded lead-acid batteries.

[0043] In some embodiments, the remote monitoring device for parameters of a flooded lead-acid battery further includes a data display 2 electrically connected to the control motherboard 15, and the data display 2 is fixedly connected to the outside of the monitoring device housing 1.

[0044] The data display 2 shows various parameters of the flooded lead-acid battery. Control buttons 3 are located below the data display 2 for easy operation of the monitoring device.

[0045] In some embodiments, the remote monitoring device for parameters of a flooded lead-acid battery also includes an alarm 19 electrically connected to the control motherboard 15, and the alarm 19 is fixedly connected to the outside of the monitoring device housing 1.

[0046] Specifically, the remote monitoring device for parameters of flooded lead-acid batteries also includes a mounting sleeve 18 fixedly connected to the outside of one side wall of the monitoring device housing 1. An alarm 19 is installed inside the mounting sleeve 18, and the alarm 19 may include a buzzer alarm, a voice alarm, and an optical alarm. When an unexpected situation is detected in the monitored battery, the alarm 19 will promptly alert the staff to avoid accidents.

[0047] In some embodiments, the remote monitoring device for parameters of a flooded lead-acid battery further includes a fixed foot pad 8 and a movable handle 4. The fixed foot pad 8 is disposed on the bottom outer surface of the monitoring device housing 1; the movable handle 4 is fixedly connected to the outer side wall of the monitoring device housing 1.

[0048] The fixed foot pads 8 are evenly distributed around the center of the bottom wall of the monitoring device housing 1 on the outer side to provide stable support and anti-slip effect for the monitoring device. Two movable handles 4 can be provided, symmetrically arranged on the outer side of one side wall, to facilitate user movement and carrying of the monitoring device.

[0049] This utility model has at least the following beneficial effects: through the built-in heat dissipation components, including wide heat pipes and heat sinks, as well as the air ducts, exhaust vents, drive motors and arc-shaped fan blades in the ventilation components, it can effectively absorb and dissipate the heat generated by the control motherboard, ensuring that the equipment operates stably within a suitable temperature range, thereby extending the service life of the overall device.

[0050] By symmetrically arranging multiple sets of air inlets and outlets on the outer shell of the monitoring device and connecting them to the air duct, this utility model optimizes the internal air circulation. This not only enhances the heat dissipation effect but also makes the heat more evenly distributed and discharged inside the device, further improving the stability and reliability of the equipment operation.

[0051] This utility model incorporates an alarm device that is electrically connected to the control board. When an unexpected situation is detected in the monitored battery, the alarm alerts the staff to prevent accidents. The device is also easy to move and carry via a handle.

[0052] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A device for remote monitoring of parameters of a flooded lead-acid battery, comprising a monitoring device housing and a control mainboard arranged in the monitoring device housing, characterized in that, The remote monitoring device for parameters of the rich liquid lead-acid battery further comprises a heat dissipation assembly and a ventilation assembly; the heat dissipation assembly comprises a wide heat pipe and a radiator connected with one end of the wide heat pipe, and the wide heat pipe is arranged above the control mainboard; the ventilation assembly comprises an air duct arranged in the monitoring device shell and an air outlet arranged on the monitoring device shell, one end of the air duct is connected with the air outlet, and the end of the wide heat pipe connected with the radiator extends into the air duct, so that the radiator is located in the air duct; the ventilation assembly further comprises a fan blade arranged at the air outlet and a driving motor driving the fan blade.

2. A remote monitoring device for parameters of a flooded lead-acid battery according to claim 1, characterized in that The ventilation assembly further comprises an air inlet, and the air inlet and the air outlet are arranged on adjacent side walls of the monitoring device shell respectively, and the other end of the air duct is connected with the air inlet.

3. A remote parameter monitoring device for a flooded lead-acid battery as claimed in claim 2, wherein, The air inlet and the air outlet have the same air passage diameter.

4. A remote parameter monitoring device for a flooded lead-acid battery as claimed in claim 2, wherein, The heat dissipation assembly is arranged in multiple groups, the ventilation assembly is arranged in multiple groups, and the specific number of the ventilation assembly is the same as the specific number of the heat dissipation assembly.

5. The remote monitoring device for parameters of a flooded lead-acid battery according to claim 1, characterized in that, The projection area of the wide heat pipe on the control mainboard is greater than 90% of the area of the control mainboard.

6. The remote monitoring device for parameters of a flooded lead-acid battery according to claim 1, characterized in that, The remote monitoring device for parameters of the rich liquid lead-acid battery further comprises a protective mesh cover arranged at the air outlet; and the protective mesh cover is detachably connected to the monitoring device shell by a plurality of rivets.

7. A remote parameter monitoring device for a flooded lead-acid battery as defined in claim 1, wherein The remote monitoring device for parameters of the rich liquid lead-acid battery further comprises a data display electrically connected with the control mainboard, and the data display is fixedly connected to the outer side of the monitoring device shell.

8. A remote parameter monitoring device for a flooded lead-acid battery as defined in claim 1, wherein The remote monitoring device for parameters of the rich liquid lead-acid battery further comprises an alarm electrically connected with the control mainboard, and the alarm is fixedly connected to the outer side of the monitoring device shell.

9. The remote monitoring device for parameters of a flooded lead-acid battery according to claim 1, characterized in that, The remote monitoring device for parameters of the rich liquid lead-acid battery further comprises a battery interface electrically connected with the control mainboard, and the battery interface is arranged at the bottom of the side wall of the monitoring device shell.

10. The remote monitoring device for parameters of a flooded lead-acid battery according to claim 1, characterized in that, The remote monitoring device for parameters of the rich liquid lead-acid battery further comprises a fixed foot pad and a moving handle, the fixed foot pad is arranged on the outer surface of the bottom of the monitoring device shell, and the moving handle is fixedly connected to the outer side wall of the monitoring device shell.