Active equalization monitoring system for lead-acid storage battery of base station

Abstract

The utility model relates to an active equalization monitoring system for a lead-acid storage battery of a base station, and belongs to the technical field of batteries. An active equalization monitoring system for a lead-acid storage battery of a base station comprises a battery pack and a parallel equalization module, wherein the battery pack is formed by connecting a plurality of single batteries in series; the parallel equalization module comprises a transistor, a relay and a resistor; positive and negative electrodes of the single battery and the single battery Bj are connected in parallel to a source electrode or a drain electrode of a transistor, and the other end of the transistor is connected to a positive and negative electrode bus through a relay. By sharing the transistor, the relay and the resistor, the voltage and energy balance among the single batteries is realized, and the complexity and the cost of the circuit are effectively reduced; and the service life and performance of the battery pack are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery technical field, more particularly to a kind of base station lead-acid battery active equalization monitoring system. BACKGROUND

[0002] According to the data of the Ministry of Industry and Information Technology, by the end of 2022, the total number of mobile communication base stations in China reached 10.83 million, and each base station had at least 2 sets of 48V backup battery packs. The use of batteries is large, and if the storage battery is not protected by technical means, the service life of the battery will be shortened. Among them, the main factors affecting the service life of the storage battery include high or low ambient temperature, overcharging, overdischarging, long-term floating charging state, and the dispersion of the battery itself. At present, there are many targeted researches on battery management and equalization, but there are also some deficiencies as follows:

[0003] One: in the traditional battery management system, the voltage and energy between battery monomers are often unbalanced. This imbalance can cause some battery monomers to be overcharged or overdischarged, thereby shortening the overall life of the battery pack.

[0004] Two: the existing equalization circuit design usually needs a large number of transistors and other components, resulting in high circuit complexity and increased cost, and a large number of transistors also reduce the reliability and stability of the system. UTILITY MODEL CONTENTS

[0005] To solve the technical problems existing in the background art, the utility model provides a kind of base station lead-acid battery active equalization monitoring system.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A kind of base station lead-acid battery active equalization monitoring system, including the battery pack of the series connection of multiple monomer batteries and parallel equalization module;The parallel equalization module contains transistor, relay and resistor;For controlling the parallel connection between two battery monomers;Wherein, the positive and negative levels of battery monomer Bj and battery monomer Bk are connected in parallel to the source or drain of transistor, the other end of transistor is connected to the positive and negative bus through relay respectively; The gate of transistor is connected to the control signal output end of controller, and the controller controls the conduction state and current flow direction of transistor through control signal;The positive and negative levels of battery monomer Bj and battery monomer Bk are connected in parallel to one end of resistor, and the other end of resistor is connected to the positive and negative bus through relay, to prevent circuit short circuit.

[0008] As a preferred technical scheme of the utility model, the resistor selects a voltage dividing resistor, and the voltage signal output end of the voltage dividing resistor is connected to the ADC input end of the controller, which is used for detecting the voltage value of the battery monomer.

[0009] As a preferred technical scheme of the utility model, The transistor selects a bidirectional conducting transistor.

[0010] As a preferred technical scheme of the utility model, The transistor is a bidirectional MOSFET transistor.

[0011] As a preferred technical scheme of the utility model, the energy storage device and a plurality of switchers are arranged on the series battery circuit, which are used for voltage balancing during charging and discharging between the battery groups.

[0012] As a preferred technical scheme of the utility model, the energy storage device is a capacitor or an inductor.

[0013] The utility model has the advantages of:

[0014] 1. The transistor, the relay and the resistor are shared, The transistor, the relay and the resistor are shared, the voltage and energy between the battery monomers are balanced, the complexity and cost of the circuit are effectively reduced, and the service life and performance of the battery group are improved.

[0015] 2. The voltage dividing resistor is selected, which can not only prevent the circuit from short circuiting, but also can monitor the voltage of the battery monomer in real time and generate a control signal; the controller controls The conducting state and direction of the transistor and the relay according to the signal, which is particularly suitable for balancing the voltage of each battery monomer in parallel during long-time static polarization.

[0016] 3. The energy storage device is used to balance the voltage of each battery group quickly and efficiently during the charging and discharging process, and improve the system efficiency. DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0018] Figure 1 It is the circuit principle diagram of the parallel balancing module in the utility model.

[0019] Figure 2 It is the circuit connection diagram of the energy storage device in the embodiment 2 of the utility model.

[0020] In the drawings, the components represented by the numbers are listed as follows:

[0021] - Battery cell, Bj- Battery cell, Bk- Battery cell Transistor, L-relay, R-resistor, T-controller. Detailed Implementation

[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] Please see Figure 1 As shown, a base station lead-acid battery active balancing monitoring system includes a battery pack composed of multiple individual batteries connected in series and a parallel balancing module; the parallel balancing module includes... Transistor, relay L, and resistor R; used to control two battery cells. Parallel connection between them; wherein, battery cells The positive and negative terminals of the battery cell Bj are connected in parallel to each other. On the source or drain of the transistor, The other end of the transistor is connected to the positive and negative buses respectively via relay L; The transistor's gate is connected to the control signal output terminal of the controller T, and the controller T controls the transistor through the control signal. The conduction state and current flow of the transistor; the positive and negative terminals of battery cells Bj and Bk are connected in parallel to one end of resistor R, and the other end of resistor R is connected to the positive and negative bus through relay L to prevent short circuit.

[0025] As a preferred embodiment, the The transistor is a bidirectional transistor; specifically, a bidirectional MOSFET transistor.

[0026] Working principle: This invention utilizes parallel balancing to achieve identical battery energy and terminal voltage. The difference lies in the use of a shared... Transistor design to reduce the number of transistors required. A transistor, relay L, and resistor R are strategically used in a parallel circuit. Because the bidirectional MOSFET transistor has bidirectional conduction characteristics, current can flow from the source to the drain, or vice versa. Combined with a double-throw relay L, and controlled by a controller T, the circuit achieves optimal performance. The on-off state and direction of the transistor and relay L; the natural balanced voltage of the parallel circuit and the effect of the battery energy.

[0027] As a preferred embodiment, the resistor R is selected as a voltage dividing resistor, and the voltage signal output end of the voltage dividing resistor is connected to the ADC input end of the controller T, for detecting the voltage value of each battery monomer. By selecting the voltage dividing resistor, not only can the circuit short circuit be prevented, but also the voltage of each battery monomer can be monitored in real time, and a control signal can be generated. The controller T controls the on-off state and direction of the transistor and relay L according to the signal, so as to realize the voltage balance between the battery monomers. The on-off state and direction of the transistor and relay L; the natural balanced voltage of the parallel circuit and the effect of the battery energy.

[0028] The voltage dividing resistor realizes voltage detection by voltage distribution between resistors and is reduced to a low voltage range suitable for ADC input, and is a simple and effective circuit component. It is widely used in the fields of voltage detection, reference voltage and signal conditioning.

[0029] Embodiment 2

[0030] Please refer to Figure 2 As shown in FIG. 2, on the basis of the embodiment 1, the active equalization monitoring system of the base station lead-acid battery further comprises an energy storage device and a plurality of switchers arranged on the series battery circuit, for voltage balance during charging and discharging of the battery pack 1, the battery pack 2 and the battery pack n. The battery pack 1, the battery pack 2 and the battery pack n together constitute a battery pack of the base station.

[0031] The energy storage device is a capacitor or an inductor. The energy storage device realizes rapid and efficient voltage balance of each battery pack during the charging and discharging process, and makes up for the deficiency that the parallel equalization circuit can only be used for depolarization at rest; and further improves the equalization efficiency of the system.

[0032] In the optional embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, another division mode can be used. For example, a plurality of units can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0033] The above is only an example and description of the structure of the utility model, and various modifications or supplements or similar replacements of the described specific embodiments can be made by the skilled in the art without deviating from the structure of the utility model or beyond the scope defined by the claims, which shall belong to the protection scope of the utility model.

Claims

1. An active equalization monitoring system for a base station lead-acid battery, comprising: The application relates to a battery pack comprising a plurality of single cells connected in series and a parallel equalization module; the parallel equalization module comprises Transistors, relays and resistors For controlling the parallel connection between two battery monomers; wherein, the battery monomers and the positive and negative levels of the battery monomer Bj are connected in parallel to the source or drain of the transistor, the other end of the transistor is connected to the positive and negative bus through the relay respectively; the gate of the transistor is connected to the control signal output end of the controller, and the controller controls the on-off state of the transistor and the current flow direction; the positive and negative levels of the battery monomer Bj and the battery monomer Bk are connected in parallel to one end of the resistor, and the other end of the resistor is connected to the positive and negative bus through the relay respectively, preventing the circuit from being short-circuited.

2. A positive active material balancing monitoring system for a base station lead acid battery according to claim 1, wherein The Transistors are selected from bidirectional transistors.

3. A positive active material balancing and monitoring system for a base station lead acid battery as defined in claim 1, wherein The The transistor is a bidirectional MOSFET transistor.

4. A positive active material balancing and monitoring system for a lead acid battery of a base station as claimed in claim 1, wherein, The resistor is selected from a voltage dividing resistor, and an electric signal output end of the voltage dividing resistor is connected to an ADC input end of the controller, and is used for detecting a voltage value of the battery monomer.

5. A positive active material balancing and monitoring system for a lead acid battery of a base station as claimed in claim 1, wherein, The application also includes an energy storage device and a plurality of switchers arranged on the series battery pack circuit, and used for voltage balancing between the battery packs during charging and discharging.

6. A positive active material balancing monitoring system for a base station lead acid battery according to claim 5, wherein The energy storage device is a capacitor or an inductor.

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