Online sulfur removal system and method for lead-acid storage battery

Abstract

The invention discloses an on-line sulfur removal system and method for a lead-acid storage battery, and relates to the field of lead-acid batteries, the on-line sulfur removal system for the lead-acid storage battery comprises a storage battery pack, the storage battery pack is formed by connecting a plurality of storage battery units in series, and the number of the storage battery units is one more than that of the storage battery units in the storage battery pack with rated voltage; the sulfur removal module is connected with the two ends of each storage battery unit and is used for removing sulfur from the storage battery units; and the circuit switching module is electrically connected with the storage battery pack, and is used for moving the storage battery pack out of the main circuit during desulfurization and connecting the storage battery pack to a processing circuit. Forward sharp pulses are directly applied to the positive electrode and the negative electrode of each storage battery unit through the sulfur removal module, efficient sulfur removal is achieved, meanwhile, the sulfur removal units are automatically short-circuited and separated, and the output voltage is kept stable. The voltage acquisition module monitors the voltage of each battery unit in real time, and the on-line processor module controls circuit switching, so that automatic balanced desulfurization is realized, vulcanization is prevented, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid battery desulfurization, in particular to an online lead-acid battery desulfurization system and method. Background Art

[0002] When the lead-acid battery is discharged, the active substances at both electrodes react with the sulfuric acid solution and become sulfuric acid compounds - lead sulfate; when charging, the lead sulfate on the two electrodes is restored to the original spongy lead and lead dioxide, and this conversion process is reversible. This discharge and charge process can be repeated many times until the end of the life of the lead-acid battery.

[0003] In the past, the battery "sulfurization" problem was solved by verifying discharge. The battery maintenance regulations of many industries, such as the power industry and the communication industry, stipulate that if the capacity of batteries that do not reach the rated capacity still does not reach more than 80% of the rated capacity after three verification discharges, the batteries are considered scrapped and can only be solved by replacing the batteries. Later, various offline battery repair technologies also appeared, but the obvious defect of this type of battery "sulfurization" repair method is that the repair is carried out only after the battery pack is seriously deteriorated, and the battery must be out of operation before offline repair can be carried out.

[0004] The pulse output line of the existing desulfurization equipment is connected to the two ends of the battery pack, and the sharp pulse wave is directly applied to the two ends of the battery pack. The desulfurization pulse part will be absorbed by the electrical equipment and the rectifier shunt, and the battery pack can absorb less of the sharp pulse energy, resulting in unsatisfactory desulfurization effect of the battery pack. In addition, the sharp pulse that exceeds the floating charge voltage can easily cause ripple interference to the electrical equipment. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is.

[0007] To solve the above technical problems, in a first aspect, the present invention provides the following technical solutions: an online desulfurization system for lead-acid batteries, comprising a battery pack composed of a plurality of battery cells connected in series and the number of the battery cells is one more than the number of battery cells in a battery pack of rated voltage; a desulfurization module connected to both ends of each of the battery cells for desulfurizing the battery cells; and a circuit switching module electrically connected to the battery pack for moving the battery pack out of the main circuit and connecting it to a processing circuit during desulfurization.

[0008] As a preferred solution of the online desulfurization system for lead-acid batteries of the present invention, it further includes a voltage acquisition module, which is electrically connected to the battery pack and is used to collect voltage information of each individual battery unit.

[0009] As a preferred solution of the online desulfurization system for lead-acid batteries of the present invention, it further includes an online processing module, which is electrically connected to the desulfurization module, the circuit switching module and the voltage acquisition module respectively.

[0010] As a preferred solution of the online desulfurization system for lead-acid batteries of the present invention, the desulfurization module performs desulfurization by applying a sharp pulse wave to both ends of the battery unit.

[0011] As a preferred solution of the online desulfurization system for lead-acid batteries of the present invention, the circuit switching module includes a short-circuit, both ends of which are respectively connected to the external connection points at both ends of the battery unit, and a first switch is also arranged on the short-circuit.

[0012] As a preferred solution of the online desulfurization system for lead-acid batteries described in the present invention, the circuit switching module further includes a disconnection separation mechanism and an external circuit, the disconnection separation mechanism includes a second switch and a third switch respectively arranged on the circuit between the internal and external contacts on both sides of the battery unit; the external circuit includes two circuits, one end of the two circuits is respectively connected to the internal contacts on both sides of the battery unit, and the other end is connected to the desulfurization module, and the external circuit is also respectively provided with a fourth switch and a fifth switch.

[0013] Another object of the present invention is to provide an online desulfurization method for lead-acid batteries, which is applicable to the above-mentioned online desulfurization system for lead-acid batteries. The method includes real-time acquisition of voltage data of each battery cell by a voltage acquisition module; an online processing module determines whether it is necessary to desulfurize a certain battery cell according to preset conditions; when it is necessary to desulfurize a certain battery cell, the battery cell is removed from the main line and connected to the desulfurization line by a circuit switching module; and a positive sharp pulse wave is applied to both ends of the battery cell by a desulfurization module.

[0014] As a preferred solution of the online desulfurization method for lead-acid batteries of the present invention, the circuit switching module includes a short-circuit, both ends of the short-circuit are respectively connected to the external connection points at both ends of the battery unit, and a first switch is also arranged on the short-circuit.

[0015] As a preferred solution of the online desulfurization method for lead-acid batteries described in the present invention, the circuit switching module further includes a disconnection separation mechanism and an external circuit, the disconnection separation mechanism includes a second switch and a third switch respectively arranged on the circuit between the internal and external contacts on both sides of the battery unit; the external circuit includes two circuits, one end of the two circuits is respectively connected to the internal contacts on both sides of the battery unit, and the other end is connected to the desulfurization module, and the external circuit is also respectively provided with a fourth switch and a fifth switch.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention adopts an online operation mode. The desulfurization module is respectively connected to the positive and negative poles of each battery unit. The positive spike pulse output by the desulfurization module is directly applied to each single cell, and will not be absorbed by the electrical equipment connected in parallel with the battery pack, thereby improving the desulfurization efficiency of the battery of the present invention;

[0018] 2. When the desulfurization module of the present invention is applied to a battery cell during use, the battery cell is short-circuited and separated. Since one battery cell is added to the normal number of battery cells, there is always one battery cell performing the desulfurization operation, and the external output voltage remains unchanged;

[0019] 3. The present invention uses a voltage acquisition module to detect the voltage of each battery cell, providing a basis for evaluating the desulfurization effect of the present invention on the battery;

[0020] 4. The present invention uses an online processor module to issue real-time instructions to the circuit switching module, which can not only realize online balanced desulfurization of the battery, but also prevent the battery from being sulfided, thereby extending the life of the battery;

[0021] 5. The present invention is connected to a battery pack and no manual intervention is required after normal operation, thus reducing the maintenance workload of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is the scenario diagram of the online desulfurization system for lead-acid batteries.

[0024] Figure 2 This is the structural diagram of the online desulfurization system for lead-acid batteries. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0029] Example 1

[0030] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and provides an online desulfurization system for lead-acid batteries. The online desulfurization system for lead-acid batteries includes a battery pack 100, a desulfurization module 200, a circuit switching module 300, a voltage acquisition module 400 and an online processing module 500.

[0031] Specifically, the battery pack 100 is formed by connecting a plurality of battery cells 101 in series, and the number of battery cells 101 in the battery pack 100 of the present invention is one more than the number of battery cells in a battery pack of a conventional rated voltage.

[0032] The desulfurization module 200 is connected to both ends of each battery cell 101 in the battery pack 100, and applies a sharp pulse wave to both ends of the battery cell 101. Through high frequency, high voltage and composite pulse technology, it can effectively crush the lead sulfate crystals and convert them into active material lead oxide, thereby restoring the performance of the battery and extending its service life.

[0033] The circuit switching module 300 can short-circuit the battery unit 101 in the battery pack 100 and remove it and connect it to the processing circuit when desulfurization is required.

[0034] The voltage collection module 400 is electrically connected to the battery pack 100 and is used to collect voltage information of each individual battery unit 101 .

[0035] The online processing module 500 is electrically connected to the desulfurization module 200, the circuit switching module 300 and the voltage acquisition module 400. Furthermore, the battery pack 100 is electrically connected to the desulfurization module 200, the circuit switching module 300 and the voltage acquisition module 400 through signal lines.

[0036] Example 2

[0037] Reference Figure 1 and Figure 2 , which is the second embodiment of the present invention, and is based on the previous embodiment. This embodiment provides a circuit switching module 300.

[0038] Specifically, the circuit switching module 300 includes a short circuit, a disconnection and separation mechanism, and an external connection circuit.

[0039] The two ends of the short-circuit are connected to the external connection points on both sides of the battery unit 101, and a first switch S1 is provided on the short-circuit. The disconnection separation mechanism is two control switches, namely the second switch S2 and the third switch S3. The two control switches are respectively provided on the lines between the internal and external connection points on both sides of the battery unit 101. The external connection line includes two lines, one end of the two lines is respectively connected to the internal connection points on both sides of the battery unit 101, and the other end is connected to the desulfurization module 200, and the four switches S4 and the fifth switches S5 are respectively provided on the two lines.

[0040] Example 3

[0041] Reference Figure 1 and Figure 2 , which is the third embodiment of the present invention, and is based on the first two embodiments. This embodiment provides an online desulfurization method for lead-acid batteries, which is applicable to the online desulfurization system for lead-acid batteries in Embodiments 1 and 2. The method comprises:

[0042] S1: Device initialization.

[0043] Specifically, the battery pack 100, the desulfurization module 200, the circuit switching module 300, the voltage acquisition module 400 and the online processing module 500 are installed and electrically connected.

[0044] The online processing module 500 starts up and performs a system self-check to confirm that each module is normally connected and operational.

[0045] S2: The voltage data of each battery unit 101 is collected in real time through the voltage collection module 400 .

[0046] The voltage acquisition module 400 starts to collect voltage data of each battery unit 101, and transmits the collected voltage information to the online processor module 500 for analysis in real time.

[0047] S3: The online processing module 500 determines whether desulfurization is required for a certain battery unit 101 according to preset conditions.

[0048] S4: When a certain battery unit 101 needs to be desulfurized, the battery unit 101 is removed from the main circuit and connected to the desulfurization circuit through the circuit switching module 300.

[0049] S5: The desulfurization module 200 applies a positive spike pulse wave to both ends of the designated battery cell 101 according to the instruction of the real-time online processor. The spike pulse wave eliminates the lead sulfate crystals in the battery, thereby achieving desulfurization of the target battery cell.

[0050] S6: Voltage monitoring and feedback.

[0051] During the desulfurization process, the voltage acquisition module 400 continuously monitors the voltage change of the target battery unit 101. The real-time online processing module 500 adjusts the intensity and duration of the sharp pulse desulfurization according to the real-time voltage data to ensure the stability and safety of the processing process.

[0052] S7: Battery unit reset.

[0053] When the desulfurization process is completed, the online processor module 400 instructs the circuit switching module 300 to restore the connection of the target battery cell to the main battery pack. The system rechecks the status of the battery cell to ensure that the battery is working properly before ending the desulfurization cycle.

[0054] S8: Repeat the process.

[0055] The system cyclically monitors the status of all battery cells 101, and repeats the above steps for other battery cells when necessary, gradually completing the online desulfurization of the entire battery group.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A lead-acid battery online desulfurization system, characterized in that: include, A battery pack (100) comprising a plurality of battery cells (101) connected in series, wherein the number of the battery cells (101) is one more than the number of battery cells in the battery pack of rated voltage; A desulfurization module (200) connected to two ends of each of the battery cells (101) and used for desulfurizing the battery cells (101); A circuit switching module (300) is electrically connected to the battery pack (100) and is used to remove the battery pack (100) from the main circuit and connect it to a processing circuit during desulfurization.

2. The lead-acid battery online desulfurization system according to claim 1, characterized in that: It also includes a voltage acquisition module (400), which is electrically connected to the battery pack (100) and is used to acquire voltage information of each individual battery unit (101).

3. The lead-acid battery online desulfurization system according to claim 2, characterized in that: It also includes an online processing module (500), which is electrically connected to the desulfurization module (200), the circuit switching module (300) and the voltage acquisition module (400) respectively.

4. The lead-acid battery online desulfurization system according to claim 3, characterized in that: The desulfurization module (200) performs desulfurization by applying a sharp pulse wave to both ends of the battery unit (101).

5. The lead-acid battery online desulfurization system according to claim 4, characterized in that: The circuit switching module (300) comprises a short-circuit, the two ends of which are respectively connected to the two end external connection points of the battery unit (101), and a first switch (S1) is also arranged on the short-circuit.

6. The lead-acid battery online desulfurization system according to claim 5, characterized in that: The circuit switching module (300) further comprises a disconnection separation mechanism and an external connection circuit, wherein the disconnection separation mechanism comprises a second switch (S2) and a third switch (S3) respectively arranged on the circuit between the internal and external contacts on both sides of the battery unit (101); the external connection circuit comprises two circuits, one end of the two circuits is respectively connected to the internal contacts on both sides of the battery unit (101), and the other end is connected to the desulfurization module (200), and the external connection circuit is also respectively provided with a fourth switch (S4) and a fifth switch (S5).

7. A lead-acid battery online desulfurization method, characterized in that: It is applicable to the lead-acid battery online desulfurization system as claimed in any one of claims 2 to 6, and the method comprises: The voltage data of each storage battery unit (101) is collected in real time through a voltage collection module (400); The online processing module (500) determines whether desulfurization is required for a certain battery unit (101) according to preset conditions; When a certain storage battery unit (101) needs to be desulfurized, the storage battery unit (101) is removed from the main circuit and connected to the desulfurization circuit through the circuit switching module (300); A positive sharp pulse wave is applied to both ends of the battery unit (101) through the desulfurization module (200).

8. The lead-acid battery online desulfurization method according to claim 7, characterized in that: The circuit switching module (300) comprises a short-circuit, the two ends of which are respectively connected to the two end external connection points of the battery unit (101), and a first switch (S1) is also arranged on the short-circuit.

9. The lead-acid battery online desulfurization method according to claim 8, characterized in that: The circuit switching module (300) further comprises a disconnection separation mechanism and an external connection circuit, wherein the disconnection separation mechanism comprises a second switch (S2) and a third switch (S3) respectively arranged on the circuit between the internal and external contacts on both sides of the battery unit (101); the external connection circuit comprises two circuits, one end of the two circuits is respectively connected to the internal contacts on both sides of the battery unit (101), and the other end is connected to the desulfurization module (200), and the external connection circuit is also respectively provided with a fourth switch (S4) and a fifth switch (S5).

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