A lead-acid battery electrolyte density measuring device

Abstract

The application discloses a kind of lead-acid battery electrolyte density measuring device, belong to battery measurement technical field, including detection mechanism, detection mechanism includes connecting column and tuning fork mechanism, tuning fork mechanism includes tuning fork base and tuning fork sensor, double-layer isolation mechanism is sleeved on tuning fork mechanism, double-layer isolation mechanism includes inner cover mechanism and microporous outer cover mechanism, the microporous material of outer cover mechanism can be penetrated through outer cover mechanism by electrolyte and is blocked to bubble, inner cover mechanism is passed through the first passage of inner layer cover and the second passage of outer layer cover by staggered arrangement, so that electrolyte is contacted with tuning fork sensor by multiple times of turning flow.This application is sleeved with double-layer isolation mechanism on tuning fork mechanism, outer cover mechanism is made of microporous material to realize electrolyte penetration and bubble blocking, inner cover is forced to flow roundabout by staggered passage design, bubble adhesion is eliminated by double structure cooperation, turbulence interference is inhibited, the frequency signal of tuning fork sensor is stabilized, and measurement accuracy and sensitivity are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of battery measurement technology, and more specifically to a device for measuring the electrolyte density of a lead-acid battery. Background Technology

[0002] The mainstream methods for online monitoring of electrolyte density in lead-acid batteries include ultrasonic method, vibrating tube method, differential pressure method and tuning fork resonance method. Among them, tuning fork sensors are widely used in the fields of liquid level, density, viscosity and temperature measurement.

[0003] In the field of nuclear reactors, lead-acid batteries, as safety-grade backup power sources, have extremely high reliability requirements and urgently need online operation and maintenance technology. However, existing solutions only use a single-layer bubble shield, which is difficult to use for long-term application in small-diameter, highly corrosive environments, and cannot effectively block dense bubble interference. Furthermore, they struggle to address the problem of numerous dense bubbles adhering to the battery during charging and discharging, leading to signal drift and measurement instability. This invention proposes a new solution to these problems. Summary of the Invention

[0004] To overcome at least one of the aforementioned drawbacks, this invention provides a device for measuring the electrolyte density of a lead-acid battery. The objective of this invention can be achieved by employing the following technical solution:

[0005] This application provides a lead-acid battery electrolyte density measuring device, including a detection mechanism, the detection mechanism comprising:

[0006] Connecting column;

[0007] A tuning fork mechanism is provided, which is connected to the connecting post. The tuning fork mechanism includes a tuning fork base disposed at the end of the connecting post, a tuning fork sensor disposed on the tuning fork base, and a double-layer isolation mechanism sleeved on the tuning fork mechanism. The double-layer isolation mechanism includes an inner cover mechanism and an outer cover mechanism sleeved on the inner cover mechanism. The outer cover mechanism includes a microporous material to allow electrolyte to permeate through the outer cover mechanism and block air bubbles. The inner cover mechanism includes an inner layer cover and an outer layer cover sleeved on the inner layer cover. The inner layer cover has a first channel, and the outer layer cover has a second channel. The first channel and the second channel are staggered so that the electrolyte sequentially passes through the outer cover mechanism, the second channel, and the first channel to contact the tuning fork sensor.

[0008] In one possible implementation, the outer cover mechanism is made of acid-resistant and corrosion-resistant microporous fluororubber foam material. The inner cover includes an inner cover sidewall and an inner cover bottom wall. A plurality of first channels are formed on the inner cover sidewall in the circumferential direction. The outer cover includes an outer cover sidewall and an outer cover bottom wall. A plurality of second channels are formed on the outer cover sidewall in the circumferential direction. The second channels are located between the inner cover bottom wall and the outer cover bottom wall.

[0009] In one possible implementation, the outer cover mechanism includes:

[0010] The support frame includes a plurality of U-shaped rods;

[0011] A microporous cover, which is heat-shrinkably fitted onto the support frame to form a cylindrical structure with one end open.

[0012] In one possible implementation, the connecting column is provided with an outer cover interface, and the outer cover mechanism further includes:

[0013] The outer cover buckle is disposed at the open end of the outer cover mechanism and is used to engage with the outer cover interface so that the outer cover mechanism can be detachably connected to the connecting post.

[0014] In one possible implementation, the connecting post is provided with an annular flange, and the annular flange is provided with an exhaust groove for venting gas generated inside the battery.

[0015] In one possible implementation, the connecting post is provided with a plug-in interface for detachable connection with a lead-acid battery interface, and the plug-in interface is located between the tuning fork mechanism and the annular flange.

[0016] In one possible implementation, the tuning fork sensor is made entirely of ceramic material, and the fork body has no exposed metal electrodes. The tuning fork base is equipped with a piezoelectric element and a temperature sensor. The piezoelectric element is used to generate a resonant frequency for the tuning fork sensor and collect vibration signals, and the temperature sensor is used to collect electrolyte temperature signals in real time.

[0017] In one possible implementation, a display mechanism is also included, which is connected to the connection interface of the connecting post via a transmission cable.

[0018] In one possible implementation, the display mechanism includes a housing, on which a display screen, an input panel, and a rear cover are provided, and a transmitter module is provided inside the housing.

[0019] In one possible implementation, the display mechanism further includes:

[0020] Power supply interface, used for connecting to electrical cables;

[0021] Mounting brackets are used to secure the housing.

[0022] The beneficial technical effects of this invention are as follows: According to this disclosure, the lead-acid battery electrolyte density measuring device uses a tuning fork as a sensor to measure the electrolyte density by the change in resonant frequency. A double-layer isolation mechanism is installed on the tuning fork mechanism. The outer cover mechanism uses a microporous material to allow the electrolyte to slowly permeate while effectively blocking air bubbles from entering. The inner cover mechanism, through the staggered arrangement of the first and second channels, forces the electrolyte flow path to undergo multiple turns and velocity changes, further dispersing and blocking air bubbles, preventing air bubbles from directly adhering to the surface of the tuning fork sensor, and reducing the interference of air bubbles on the tuning fork resonant frequency. The meandering flow path formed by the staggered channels not only blocks air bubbles but also reduces the electrolyte flow velocity, avoiding turbulence interference with the tuning fork vibration, enabling the tuning fork sensor to maintain a stable frequency signal output and improving the density detection sensitivity. Attached Figure Description

[0023] The following are given by way of example and without limitation in the accompanying drawings:

[0024] Figure 1 This diagram illustrates the overall structure of an embodiment of the present invention at one angle.

[0025] Figure 2 This diagram illustrates the overall structure from another angle, according to an embodiment of the present invention.

[0026] Figure 3 A partial structural schematic diagram provided by an embodiment of the present invention is shown;

[0027] Figure 4 A schematic diagram of an inner cover mechanism at a specific angle is shown in an embodiment of the present invention.

[0028] Figure 5 A schematic diagram of the inner cover mechanism structure from another angle is shown in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the inner cover mechanism structure provided by an embodiment of the present invention from another angle is shown;

[0030] Figure 7 A schematic diagram of the outer cover buckle and support frame structure provided in an embodiment of the present invention is shown.

[0031] In the diagram: 1. Display screen; 2. Transmission cable; 3. Plug-in interface; 4. Connecting post; 5. Outer cover interface; 6. Inner cover mechanism; 61. Inner cover; 611. First channel; 62. Outer cover; 621. Second channel; 7. Outer cover mechanism; 8. Tuning fork sensor; 9. Tuning fork base; 10. Exhaust duct; 11. Connection interface; 12. Mounting bracket; 13. Rear cover; 14. Transmitter module; 15. Power supply interface; 16. Input panel; 20. Outer cover buckle; 21. Support frame. Detailed Implementation

[0032] In the following detailed disclosure, these embodiments are fully described with reference to the accompanying drawings. In order to enable those skilled in the art to more clearly understand and comprehend the technical solutions of the present invention, the embodiments described below are not limited thereto. The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0033] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] This application provides a device for measuring the density of lead-acid battery electrolyte, such as... Figures 1-7 As shown, the device includes a detection mechanism, which comprises a connecting post 4 and a tuning fork mechanism. The tuning fork mechanism is connected to the connecting post 4 and includes a tuning fork base 9 disposed at the end of the connecting post 4. A tuning fork sensor 8 is disposed on the tuning fork base 9. A double-layer isolation mechanism is fitted onto the tuning fork mechanism. The double-layer isolation mechanism includes an inner cover mechanism 6 and an outer cover mechanism 7 fitted onto the inner cover mechanism 6. The outer cover mechanism 7 comprises a microporous material to allow the electrolyte to penetrate through the outer cover mechanism 7 and block air bubbles. The inner cover mechanism 6 includes an inner cover 61 and an outer cover 62 fitted onto the inner cover 61. The inner cover 61 has a first channel 611, and the outer cover 62 has a second channel 621. The first channel 611 and the second channel 621 are staggered so that the electrolyte sequentially passes through the outer cover mechanism 7, the second channel 621, and the first channel 611 to contact the tuning fork sensor 8.

[0036] The lead-acid battery electrolyte density measuring device provided in this embodiment uses a tuning fork as a sensor to measure the electrolyte density by measuring the change in resonant frequency. By incorporating a double-layer isolation mechanism on the tuning fork, the outer cover 7, made of microporous material, allows the electrolyte to slowly permeate while effectively blocking air bubbles, forming the first isolation barrier. The inner cover 6, through the staggered arrangement of the first channel 611 and the second channel 621, forces the electrolyte flow path to undergo multiple turns and velocity changes, further dispersing and blocking air bubbles, forming the second isolation barrier. This prevents air bubbles from directly adhering to the surface of the tuning fork sensor 8, reducing the interference of air bubbles on the tuning fork's resonant frequency. The meandering flow path formed by the staggered channels not only blocks air bubbles but also reduces the electrolyte flow velocity, avoiding interference from turbulence on the tuning fork vibration. This allows the tuning fork sensor 8 to maintain a stable frequency signal output, improving the density detection sensitivity.

[0037] In one possible implementation, such as Figures 1-7 As shown, the outer cover mechanism 7 is made of acid-resistant and corrosion-resistant microporous fluororubber foam material. The inner cover 61 includes an inner cover side wall and an inner cover bottom wall. Several first channels 611 are opened along the circumferential direction on the inner cover side wall. The outer cover 62 includes an outer cover side wall and an outer cover bottom wall. Several second channels 621 are opened along the circumferential direction on the outer cover side wall. The second channels 621 are located between the inner cover bottom wall and the outer cover bottom wall.

[0038] The outer casing 7 is made of acid-resistant microporous fluororubber foam material, which allows electrolyte to penetrate while effectively blocking air bubbles, forming the first physical barrier, and has strong corrosion resistance to adapt to the acidic environment of lead-acid batteries.

[0039] The inner cover mechanism 6, through the first channel 611 and the second channel 621 arranged in a staggered manner on the inner cover 61 and the outer cover 62, forces the electrolyte to form a meandering flow channel between the inner cover 61 and the outer cover 62, which disperses bubbles and reduces flow velocity, thus avoiding turbulence from interfering with the vibration of the tuning fork.

[0040] Understandably, the cooperation between the outer cover mechanism 7 and the inner cover mechanism 6 effectively isolates the air bubbles from the fluid and reduces the flow rate, thus preventing the air bubbles from directly adhering to the surface of the tuning fork.

[0041] The dual isolation structure, employing a multi-channel staggered bubble isolation cover and an acid-resistant semi-enclosed microporous cover, significantly reduces bubble adhesion and turbulence effects under conditions where a large number of bubbles are generated. This improves the stability of the tuning fork resonant frequency signal by over 90%, and controls the maximum error in density measurement to within ±0.003 g / cm³. 3 Within.

[0042] In one possible implementation, such as Figure 7As shown, the outer cover mechanism 7 includes a support frame 21 and a microporous cover. The support frame 21 includes several U-shaped rods, and the microporous cover is heat-shrinkably fitted onto the support frame 21 to form a cylindrical structure with one end open.

[0043] Several U-shaped rods form a stable cylindrical support frame 21, providing uniform support for the microporous cover and ensuring the cylindrical structure maintains its shape stability in the electrolyte environment. The microporous cover is made of acid-resistant microporous fluororubber foam, which is tightly bonded to the support frame 21 through a heat-shrink process. This not only effectively enhances the sealing performance but also avoids the corrosion and aging risks that may be caused by adhesives. The microporous material allows selective electrolyte penetration while preventing air bubbles from entering the internal detection area, thus improving measurement accuracy. The cylinder is open at one end for easy installation and maintenance.

[0044] In one possible implementation, such as Figure 7 As shown, the connecting column 4 is provided with an outer cover interface 5, and the outer cover mechanism 7 also includes an outer cover buckle 20. The outer cover buckle 20 is provided at the open end of the outer cover mechanism 7 and is used to engage with the outer cover interface 5 so that the outer cover mechanism 7 can be detachably connected to the connecting column 4.

[0045] The outer cover buckle 20 on the microporous cover is installed on the connecting column 4 in conjunction with the outer cover interface 5, so that the outer cover mechanism 7 can be quickly disassembled and assembled, which is convenient for maintenance or replacement of parts, while ensuring connection stability. The outer cover buckle 20 is set at the open end and forms a mechanical interlock with the outer cover interface 5 of the connecting column 4, which not only ensures sealing but also avoids accidental detachment due to vibration.

[0046] The enclosure material allows liquid to permeate while blocking air bubbles, thus enabling stable measurement in the environment of lead-acid battery charging and discharging with air bubble interference.

[0047] In one possible implementation, such as Figure 1 and Figure 2 As shown, the connecting post 4 is provided with an annular flange, and the annular flange is provided with an exhaust groove 10 for the gas generated inside the battery to be discharged.

[0048] The connecting post 4 has an annular flange at its upper end, which is located above the lead-acid battery interface. The annular flange has multi-directional exhaust grooves 10, which are arranged along the axial direction of the connecting post 4. Several exhaust grooves 10 are arranged circumferentially. The coordinated design of the exhaust grooves 10 and the lead-acid battery interface forms a gas guiding channel to ensure that the hydrogen and oxygen gases generated during the operation of the lead-acid battery can be discharged in a timely and effective manner from different directions, preventing gas accumulation and potential danger.

[0049] In one possible implementation, such as Figure 1 and Figure 2As shown, the connecting post 4 is provided with a plug-in interface 3 for detachable connection with the lead-acid battery interface. The plug-in interface 3 is located between the tuning fork mechanism and the annular flange.

[0050] The connecting post 4 is equipped with a screw-in interface 3 for a tight connection with the opening of the lead-acid battery, enabling quick assembly and disassembly. A mechanical interlock ensures connection stability, preventing loosening due to vibration and ensuring the device is reliably fixed to the top opening of the lead-acid battery. The overall diameter of the tuning fork mechanism can be designed to be less than 25mm to meet the opening diameter requirements of nuclear-grade lead-acid batteries. It can be directly inserted into the narrow interface of the lead-acid battery without modifying the original battery structure, making it highly adaptable.

[0051] In one possible implementation, the tuning fork sensor 8 is made entirely of ceramic material, and the fork body has no exposed metal electrodes. The tuning fork base 9 is equipped with a piezoelectric element and a temperature sensor. The piezoelectric element is used to generate a resonant frequency for the tuning fork sensor 8 and collect vibration signals, and the temperature sensor is used to collect electrolyte temperature signals in real time.

[0052] Among them, the tuning fork sensor 8 uses ceramic material to improve corrosion resistance, so as to avoid the chemical reaction between metal ions and electrolyte, thereby contaminating the lead-acid battery electrolyte and affecting the measurement accuracy.

[0053] The tuning fork base 9 is excited to a specific resonant frequency by a piezoelectric element and collects vibration signals. The temperature sensor integrated in the base monitors the electrolyte temperature signal in real time. The signal is transmitted to the transmitter module 14 located in the meter unit through the wiring interface 11 at the top of the connecting column 4 and the built-in analog transmission cable 2. The transmitter module 14 performs real-time temperature correction on the frequency-density calculation formula through the built-in temperature compensation algorithm to ensure the density measurement accuracy when the electrolyte temperature changes.

[0054] In one possible implementation, such as Figure 1 and Figure 2 As shown, the lead-acid battery electrolyte density measuring device also includes a display mechanism, which is connected to the connection interface 11 of the connecting post 4 via the transmission cable 2.

[0055] Before being put into actual operation, the tuning fork sensor 8 is calibrated with its reference resonant frequency in deionized water and air environments to correct the device's own errors, and its density is calibrated using a standard liquid.

[0056] The display mechanism (i.e., the meter head unit) and the testing mechanism are arranged separately, which makes it easy to fix the mounting bracket 12 to the shockproof frame on the side of the lead-acid battery for real-time reading and data transmission. The meter head integrates a power supply interface 15, a communication interface and a measurement data display unit, and is connected to the testing mechanism through a transmission cable 2.

[0057] The display mechanism and the testing mechanism are arranged separately and connected by a transmission cable 2. The fork of the testing mechanism can be immersed in a strong acid environment for a long time, while the meter head containing the signal processing unit is fixed to the anti-vibration frame on the side of the lead-acid battery by the mounting bracket 12, which facilitates on-site maintenance and calibration and extends service life.

[0058] In one possible implementation, such as Figure 1 and Figure 2 As shown, the display mechanism includes a housing, on which a display screen 1, an input panel 16 and a rear cover 13 are provided, and a transmitter module 14 is provided inside the housing.

[0059] The housing consists of a front cover (integrated display screen 1 and input panel 16), a middle frame (fixed transmitter module 14) and a rear cover 13, which facilitates maintenance and upgrades.

[0060] The display mechanism integrates a display screen 1, an isolation transmitter module 14, a communication interface, and an input panel 16, which are used to realize on-site display and remote data upload of lead-acid battery electrolyte density, temperature, and lead-acid battery voltage.

[0061] The display mechanism incorporates a digital temperature-density correction module, which uses an automatic curve fitting compensation algorithm based on multiple sets of temperature-frequency calibration parameters to adapt to electrolyte density variations within a temperature range of 0℃ to 60℃, keeping the measurement error within ±0.003 g / cm³. 3 Within.

[0062] In one possible implementation, such as Figure 1 and Figure 2 As shown, the display mechanism also includes a power supply interface 15 and a mounting bracket 12. The power supply interface 15 is used to connect to the power cable, and the mounting bracket 12 is used to fix the housing.

[0063] The display mechanism can be directly powered by a DC2V single lead-acid battery, and can also monitor the lead-acid battery voltage at the same time. The power consumption of the whole machine is less than 1W. It can power the MCU, excitation drive and other circuits through an isolated boost DC-DC circuit.

[0064] The tuning fork mechanism is located in the liquid phase of the nuclear safety grade lead-acid battery. The meter unit is connected to the mounting bracket 12, the mounting bracket 12 is connected to the anti-vibration frame on the side of the lead-acid battery, and the meter unit is connected to the testing mechanism through the shielded signal transmission cable 2.

[0065] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0067] In view of the detailed description above, these and other changes can be made to these embodiments, and this written description includes embodiments of the best mode that disclose the invention. The patent scope of the invention is defined by the claims, which are not limited by this disclosure. The scope of protection of the invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the invention disclosed herein, based on the technical solutions and concepts of the invention, are within the scope of protection of the invention.

Claims

1. A device for measuring the density of lead-acid battery electrolyte, characterized in that, The testing organization includes: Connecting column (4); A tuning fork mechanism is connected to the connecting post (4). The tuning fork mechanism includes a tuning fork base (9) disposed at the end of the connecting post (4). A tuning fork sensor (8) is disposed on the tuning fork base (9). A double-layer isolation mechanism is fitted on the tuning fork mechanism. The double-layer isolation mechanism includes an inner cover mechanism (6) and an outer cover mechanism (7) fitted on the inner cover mechanism (6). The outer cover mechanism (7) includes a microporous material so that the electrolyte can permeate through the outer cover mechanism (7) and block the bubble shape. To form a barrier, the inner cover mechanism (6) includes an inner cover (61) and an outer cover (62) sleeved on the inner cover (61). The inner cover (61) is provided with a first channel (611), and the outer cover (62) is provided with a second channel (621). The first channel (611) and the second channel (621) are staggered so that the electrolyte passes through the outer cover mechanism (7), the second channel (621) and the first channel (611) in sequence to contact the tuning fork sensor (8). The outer cover mechanism (7) is made of acid-resistant and corrosion-resistant microporous fluororubber foam material. The inner cover (61) includes an inner cover side wall and an inner cover bottom wall. The inner cover side wall is provided with a plurality of first channels (611) along the circumferential direction. The outer cover (62) includes an outer cover side wall and an outer cover bottom wall. The outer cover side wall is provided with a plurality of second channels (621) along the circumferential direction. The second channels (621) are located between the inner cover bottom wall and the outer cover bottom wall.

2. The lead-acid battery electrolyte density measuring device according to claim 1, characterized in that, The outer cover mechanism (7) includes: The support frame (21) includes a plurality of U-shaped rods; A microporous cover is heat-shrinkably fitted onto the support frame (21) to form a cylindrical structure with one end open.

3. The lead-acid battery electrolyte density measuring device according to claim 2, characterized in that, The connecting column (4) is provided with an outer cover interface (5), and the outer cover mechanism (7) further includes: Outer cover buckle (20), the outer cover buckle (20) is provided at the open end of the outer cover mechanism (7) for engaging with the outer cover interface (5) so that the outer cover mechanism (7) can be detachably connected to the connecting post (4).

4. The lead-acid battery electrolyte density measuring device according to claim 1, characterized in that, The connecting column (4) is provided with an annular flange, and the annular flange is provided with an exhaust groove (10) for the gas generated inside the battery to be discharged.

5. The lead-acid battery electrolyte density measuring device according to claim 4, characterized in that, The connecting post (4) is provided with a plug-in interface (3) for detachable connection with the lead-acid battery interface. The plug-in interface (3) is located between the tuning fork mechanism and the annular flange.

6. The lead-acid battery electrolyte density measuring device according to claim 1, characterized in that, The tuning fork sensor (8) is made of ceramic material and has no exposed metal electrodes. The tuning fork base (9) is equipped with a piezoelectric element and a temperature sensor. The piezoelectric element is used to generate a resonant frequency and collect vibration signals from the tuning fork sensor (8). The temperature sensor is used to collect electrolyte temperature signals in real time.

7. The lead-acid battery electrolyte density measuring device according to any one of claims 1-6, characterized in that, It also includes a display mechanism, which is connected to the connection interface (11) of the connecting post (4) via a transmission cable (2).

8. The lead-acid battery electrolyte density measuring device according to claim 7, characterized in that, The display mechanism includes a housing, on which a display screen (1), an input panel (16) and a rear cover (13) are provided, and a transmitter module (14) is provided inside the housing.

9. The lead-acid battery electrolyte density measuring device according to claim 8, characterized in that, The display mechanism further includes: Power supply interface (15) is used to connect to electrical cables; Mounting bracket (12) is used to fix the housing.

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