Direct current screen single battery voltage on-line compensation device

Abstract

The utility model relates to the technical field of battery management and maintenance, and particularly discloses a direct current screen single battery voltage on-line compensation device, which comprises an alternating current power supply body and a first air switch. The upper end of the first air switch is connected in parallel with the lower end of the direct-current screen alternating-current power supply air switch QF-ONE; and the positive electrode and the negative electrode of the electric clamp are respectively clamped on the positive electrode and the negative electrode of the low-voltage single battery GB5. After connection is completed, the first air switch is switched on, the device starts to charge the low-voltage single battery, the battery voltage is gradually increased to the average value of the voltage of the direct-current screen single battery, and the problems that when the voltage of an existing direct-current screen single battery is too low, the capacity of a direct-current screen is limited by the single battery and is greatly reduced, and the service life of the direct-current screen is prolonged are solved. And the direct current screen is in a floating charge state most of the time, so that the floating charge voltage of other batteries is too high indirectly, and the service life of the battery pack is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management and maintenance, in particular to an online compensation device for the voltage of a single battery of a DC panel. Background Art

[0002] The DC panel is a DC system with digital control, protection, management and measurement. It is usually used as an uninterruptible DC power supply in situations where 24-hour uninterrupted power supply is required.

[0003] The battery pack of a DC panel is generally composed of many single cells connected in series. During the installation and maintenance of the DC panel battery pack, improper operation can easily lead to the DC panel single cell voltage being too low. When the DC panel has a single cell voltage that is too low, the capacity of the DC panel will be limited by a single battery and greatly reduced. Moreover, the DC panel is in a floating charge state most of the time. The low single cell voltage will indirectly lead to the floating charge voltage of the remaining batteries being too high, shortening the service life of the battery pack.

[0004] In order to promptly detect when the voltage of the DC panel's single battery is too high or too low, the DC panel has a single battery voltage monitoring function, which can actually monitor the voltage of each single battery and issue an alarm when the voltage exceeds the limit.

[0005] At present, the methods to solve the low voltage of DC panel single battery are:

[0006] 1. Equalized charging: on the basis of floating charging, the charging voltage of the DC panel is increased, that is, the charging voltage of all batteries is increased at the same time. The problem with this method is that the voltage increased by equalized charging is not significantly increased after being distributed to each single battery, and equalized charging will further increase the charging voltage of other normal batteries, shortening the service life of the entire battery pack.

[0007] 2. Replace the battery pack. After the battery pack is replaced uniformly, all batteries are brand new batteries from the same batch, which can effectively solve the problem of low voltage of single cells. However, replacing the battery pack requires the battery pack to be withdrawn from use, which is equivalent to losing the power outage emergency response capability of the DC panel, which requires taking on greater risks and is costly.

[0008] 3. Recharge and discharge. That is, recharge and discharge the low-voltage battery or all batteries, ensure that the voltage and power of each battery are within the allowable range, and then reassemble. This method also requires the battery pack to be removed, and the ideal effect may not be achieved after inspection. Utility Model Content

[0009] 1. Technical issues to be resolved

[0010] In view of the deficiencies in the prior art, the utility model provides an online compensation device for the single cell voltage of a DC panel, which solves the technical problems that when the single cell voltage of the existing DC panel is too low, the capacity of the DC panel will be limited by a single battery and greatly reduced, and the DC panel is in a floating charge state most of the time and indirectly causes the floating charge voltage of the remaining batteries to be too high, thereby shortening the service life of the battery pack.

[0011] (II) Technical solution

[0012] To achieve the above objectives, the utility model is implemented through the following technical solutions: a DC panel single cell battery online voltage compensation device, including an AC power supply body, the DC panel single cell battery online voltage compensation device also includes a first circuit breaker, input wires, a switching power supply, an output wire, an electric clamp, a DC panel internal circuit and a DC panel AC power circuit breaker QF-ONE, the upper end of the first circuit breaker can directly draw power from the DC panel, and a fine-tuning knob is provided on the switching power supply, and the output voltage of the switching power supply can be fine-tuned by the fine-tuning knob.

[0013] Preferably: the first circuit breaker is connected to the input end of the switching power supply through an input wire, and the output end of the switching power supply is connected to the electric clamp through an output wire. The input voltage of the switching power supply is the same as the AC power supply body, the rated output voltage is the same as the rated voltage of the single battery, the output voltage can be fine-tuned between 100-120% of the rated voltage, and the electric clamp is an alligator clip for battery ignition.

[0014] Preferably: the upper end of the internal circuit of the DC panel is connected to the DC panel AC power circuit breaker QF-ONE, and the lower end of the internal circuit of the DC panel is electrically connected to GB1, GB9 and the low-voltage single battery GB5.

[0015] Preferably: the AC power supply body is connected to the DC panel AC power supply circuit breaker QF-ONE, and the upper end of the first circuit breaker is connected in parallel with the lower end of the DC panel AC power supply circuit breaker QF-ONE.

[0016] Preferably, the positive and negative electrodes of the electric clamp are connected to the positive and negative electrodes of the low-voltage single battery GB5, and the low-voltage single battery GB5 is also electrically connected to GB1 and GB9.

[0017] (III) Beneficial effects

[0018] 1. When the utility model is in use, the upper end of the first circuit breaker is connected in parallel with the lower end of the DC panel AC power circuit breaker QF-ONE, and the positive and negative poles of the electric clamp are respectively clamped on the positive and negative poles of the low-voltage single battery GB5. After the connection is completed, the first circuit breaker is closed, and the device starts to charge the low-voltage single battery, and gradually increases the battery voltage to the average voltage of the DC panel single battery, which solves the problem that when the voltage of the existing DC panel single battery is too low, the capacity of the DC panel will be greatly reduced by the limitation of a single battery, and the DC panel is in a floating charge state most of the time, which indirectly causes the floating charge voltage of the remaining batteries to be too high, shortening the service life of the battery pack.

[0019] 2. The utility model solves the problem of low voltage of single battery cells in the existing DC panel only by arranging the first circuit breaker, input wires, switching power supply, output wires and electric clamps to cooperate with each other. It has the characteristics of simple structure, low cost, easy use and can be used online. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0021] Figure 1 This is a main structural diagram of the device of the utility model;

[0022] Figure 2 This is a structural diagram of the overall use of the device of the utility model.

[0023] Legend: 1. First circuit breaker; 2. Input wire; 3. Switching power supply; 4. Output wire; 5. Electric clamp; 6. Internal circuit of DC panel; 7. AC power supply; 9. DC panel AC power circuit breaker QF-ONE. DETAILED DESCRIPTION

[0024] The embodiment of the present application provides an online compensation device for the single cell voltage of a DC panel, which effectively solves the problem that when the single cell voltage of the existing DC panel is too low, the capacity of the DC panel will be limited by a single battery and greatly reduced, and the DC panel is in a floating charge state most of the time, which indirectly causes the floating charge voltage of the remaining batteries to be too high, thereby shortening the service life of the battery pack.

[0025] like Figure 1 and Figure 2 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that when the voltage of the single battery of the existing DC screen is too low, the capacity of the DC screen will be greatly reduced by the limitation of a single battery, and the DC screen is in a floating charge state most of the time and indirectly causes the floating charge voltage of the remaining batteries to be too high, shortening the service life of the battery pack. The overall idea is as follows:

[0026] In view of the problems existing in the prior art, the utility model provides an online compensation device for the voltage of a single cell of a DC panel, comprising an AC power supply body 7. The online compensation device for the voltage of a single cell of a DC panel also comprises a first circuit breaker 1, an input wire 2, a switching power supply 3, an output wire 4, an electric clamp 5, an internal circuit of the DC panel 6 and a DC panel AC power circuit breaker QF-ONE9. The upper end of the first circuit breaker 1 can directly draw power from the DC panel, and a fine-tuning knob is provided on the switching power supply 3. The output voltage of the switching power supply 3 can be fine-tuned by the fine-tuning knob.

[0027] The first circuit breaker 1 is connected to the input end of the switching power supply 3 through the input wire 2, and the output end of the switching power supply 3 is connected to the electric clamp 5 through the output wire 4. The input voltage of the switching power supply 3 is the same as the AC power supply body 7, and the rated output voltage is the same as the rated voltage of the single battery. The output voltage can be fine-tuned between 100-120% of the rated voltage. The electric clamp 5 is an alligator clip for battery ignition. Before use, first adjust the fine-tuning knob on the switching power supply 3 so that its output voltage is equal to the average value of the single battery voltage during DC panel floating charge.

[0028] The upper end of the DC panel internal circuit 6 is connected to the DC panel AC power circuit breaker QF-ONE9, and the lower end of the DC panel internal circuit 6 is electrically connected to GB1, GB9 and the low-voltage single battery GB5.

[0029] The AC power supply body 7 is connected to the DC panel AC power supply circuit breaker QF-ONE9, and the upper end of the first circuit breaker 1 is connected in parallel with the lower end of the DC panel AC power supply circuit breaker QF-ONE9.

[0030] The positive and negative electrodes of the electric clamp 5 are connected to the positive and negative electrodes of the low-voltage single battery GB5, and the low-voltage single battery GB5 is also electrically connected to GB1 and GB9.

[0031] For example, if a DC panel consists of nine batteries, its AC input power supply is AC220V, and the floating charge voltage is DC121.5V, then the average voltage of the single battery during floating charge is 121.5 / 9=13.5V. Clamp the positive and negative poles of the clamp 5 to the positive and negative probes of the multimeter, connect the input end of the first circuit breaker 1 to the AC220V AC power supply body 7, and after the first circuit breaker 1 is closed, adjust the fine tuning knob on the switch power supply 3 to make the measured voltage equal to 13.5V.

[0032] The upper end of the first circuit breaker 1 is connected in parallel with the lower end of the DC panel AC power circuit breaker QF-ONE9, and the positive and negative poles of the clamp 5 are clamped on the positive and negative poles of the low-voltage single battery GB5. After the connection is completed, the first circuit breaker 1 is closed, and the device starts to charge the low-voltage single battery, and gradually increases the battery voltage to the average voltage of the DC panel single battery, which solves the technical problem that when the voltage of the existing DC panel single battery is too low, the capacity of the DC panel will be greatly reduced by the limitation of a single battery, and the DC panel is in a floating charge state most of the time, which indirectly causes the floating charge voltage of the remaining batteries to be too high, shortening the service life of the battery pack.

[0033] Working principle:

[0034] When the utility model is in use, the upper end of the first circuit breaker 1 is connected in parallel with the lower end of the DC panel AC power circuit breaker QF-ONE9, and the positive and negative electrodes of the electric clamp 5 are respectively clamped on the positive and negative electrodes of the low-voltage single battery GB5. After the connection is completed, the first circuit breaker 1 is closed, and the device starts to charge the low-voltage single battery and gradually increases the battery voltage to the average voltage of the DC panel single battery.

[0035] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A DC panel single battery voltage online compensation device, comprising an AC power source body (7), characterized in that: The DC panel single cell voltage online compensation device also includes a first circuit breaker (1), an input wire (2), a switching power supply (3), an output wire (4), an electric clamp (5), a DC panel internal circuit (6) and a DC panel AC power supply circuit breaker QF-ONE (9). The upper end of the first circuit breaker (1) can directly draw power from the DC panel. Wherein, a fine-tuning knob is provided on the switching power supply (3), and the output voltage of the switching power supply (3) can be fine-tuned by means of the fine-tuning knob.

2. A DC panel single battery voltage online compensation device as claimed in claim 1, characterized in that: The first circuit breaker (1) is connected to the input end of the switching power supply (3) via an input wire (2), and the output end of the switching power supply (3) is connected to the electric clamp (5) via an output wire (4). The input voltage of the switching power supply (3) is the same as that of the AC power supply body (7), and the rated output voltage is the same as the rated voltage of the single battery. The output voltage can be fine-tuned within a range of 100-120% of the rated voltage. The electric clamp (5) is an alligator clip for battery ignition.

3. A DC panel single cell voltage online compensation device as claimed in claim 1, characterized in that: The upper end of the DC panel internal circuit (6) is connected to the DC panel AC power supply circuit breaker QF-ONE (9), and the lower end of the DC panel internal circuit (6) is electrically connected to GB1, GB9 and the low-voltage single battery GB5.

4. A DC panel single cell voltage online compensation device as claimed in claim 3, characterized in that: The AC power source body (7) is connected to a DC panel AC power source circuit breaker QF-ONE (9), and the upper end of the first circuit breaker (1) is connected in parallel with the lower end of the DC panel AC power source circuit breaker QF-ONE (9).

5. A DC panel single cell voltage online compensation device as claimed in claim 4, characterized in that: The positive and negative electrodes of the electric clamp (5) are connected to the positive and negative electrodes of the low-voltage single battery GB5, and the low-voltage single battery GB5 is also electrically connected to GB1 and GB9.

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