CN107453432A - A storage management and control device with a display device and a charge and discharge control method thereof - Google Patents

Abstract

The invention provides a power storage management and control device with a display device and a charging and discharging control method thereof, wherein the power storage management and control device comprises a signal processor, an inspection module, a discharging module, a charging module and the display device; the signal input end of the signal processor is connected with the signal output end of the inspection module, and the signal output end of the signal processor is respectively connected with the signal input ends of the discharging module and the charging module; the signal input end of the display device is connected with the signal output end of the signal processor or the inspection module; the signal input end of the inspection module is connected with the two ends of the battery pack and the serial tap ends of the battery packs of the inspection module; the display device is used for providing information for the outside of the electricity storage management and control equipment; the electric storage management and control equipment is used for controlling charging and discharging of the fixed battery pack, can know the discharging state of each module battery in real time through the display device, controls the module batteries with backward capacity not to be deeply discharged or overcharged, and prolongs the service life of the battery pack.

Description

A storage management and control device with a display device and a charge and discharge control method thereof

technical field

The invention relates to the field of group management and control design of stationary storage batteries, in particular to a storage management and control device with a display device and a charging and discharging control method thereof.

Background technique

Stationary battery packs are an important category of products in the storage battery industry. The characteristics of their use are fixed occasions, the battery pack does not move with the discharge load, its monomer reserve capacity is generally large or the battery pack voltage is high, and the discharge time rate and charging system are generally It is also different from the power battery of electric vehicles, and is widely used in communication station UPS and energy storage and other fields. For example, the fixed battery pack of communication station generally consists of 24 nominal 2-volt single lead-acid batteries connected in series to form a 48-volt battery group use. Since lead-acid batteries are the mainstream in the market for stationary battery packs, their prices are relatively low. Conventional charge and discharge management is usually to control the voltage at both ends of the entire battery pack. If it is deeply discharged, it will be overcharged when it is charged, and its capacity will decay at an accelerated rate.

In the technological development of the electric vehicle industry in recent years, a variety of technical solutions for the management of the power battery pack have been proposed to solve the problem of short service life of the power battery pack, which has improved the service life of the power battery pack to a certain extent, but in the field of stationary storage battery applications , the technical solutions for application life management are relatively insufficient.

The most common problem with stationary battery packs is that the module cells or monomers with lagging capacity cannot be detected in time. Therefore, the industry hopes to find a method that can detect lagging module cells or cells in fixed battery packs in time and effectively prevent capacity lagging. The technical solution of deep discharge and overcharge of the module battery or single cell improves the practical life of the stationary battery pack and reduces the replacement rate of the stationary battery pack.

Contents of the invention

The object of the present invention is to provide a power storage management and control device with a display device for the above-mentioned technical defects in the conventional charging and discharging management of fixed battery packs. Preventing the module batteries with outdated capacity from being deeply discharged and overcharged can effectively prolong the matching service life of the module batteries with outdated capacity and reduce the replacement cost of series-connected battery packs. The battery pack or module battery described in the present invention is used in fixed occasions, such as in communication station UPS and energy storage and other fields; the module battery includes but not limited to the low-voltage battery pack or monomer commonly referred to in the industry.

In order to achieve the above technical purpose, the present invention provides a power storage management and control device with a display device, the power storage management and control device is used to control the charging and discharging of a fixed battery pack, including: a signal processor, a patrol module, a charging module , a discharge module and a display device; the signal processor at least includes a voltage signal comparison function and a logic processing function, and its signal input terminal is connected to the signal output terminal of the inspection module, and its signal output terminal is respectively connected to the discharge module and The signal input terminal of the charging module; the display device is used to provide information for the outside of the storage management and control equipment, and its signal input terminal is connected with the signal processor or the signal output terminal of the inspection module; the power input terminal of the discharge module The terminal is connected to the two ends of the battery pack, and its power output end is connected to the discharge load of the battery pack; the power output end of the charging module is connected to the two ends of the battery pack, and its power input end is connected to the external charging power supply of the battery pack; The signal input terminal of the inspection module is connected to both ends of the battery pack and the serial taps of each module battery in the battery pack; the power storage management and control device performs conventional floating charging on the fixed battery pack, and charges the battery pack Executes the set discharge control and charge control operations.

In the present invention, the battery pack used in conjunction with the power storage management and control device with a display device includes at least two module batteries connected in series, and the serial interfaces of both ends of the module batteries in the battery pack are provided with tap ends.

In the above technical solution, the electronic control program for performing charging control operations on the battery pack is built into the charging module, and the constant voltage value of the charging module charging the battery pack is preferentially controlled by the signal instructions of the signal processor; Controlled means that when the charging module receives the signal instruction from the signal processor, it executes the constant voltage value of the signal processor instruction. When the signal processor has no instruction, the charging module executes the built-in electronic control program.

In the above technical solution, the display mode of the display module includes: digital display, color light display, text display and voice prompt.

As an improvement of the above technical solution, the signal processor, inspection module, discharge module, charging module and display device of the power storage management and control device are arranged separately or selectively combined or shared with an integrated module. The selective combination setting includes integrating some or all functions of the control sub-modules of each module, for example, integrating some or all functions of the inspection module into the signal processor, and integrating the discharge module and the charging module integrated design.

Based on the aforementioned power storage management and control device with a display device, the present invention also provides a charge and discharge control method for the aforementioned power storage management and control device with a display device, the method comprising:

Step 1) Use the charging module to charge the battery pack with the set float voltage.

Step 2) using the inspection module to perform data inspection on the real-time voltage of each module battery or/and battery pack;

Step 3) Receive the data obtained by the inspection in step 2) through the signal processor, use the display device to dynamically display the data obtained by the inspection, and set the data obtained by the inspection and its internal storage by the signal processor When the signal processor detects that the voltage of any module battery drops to the internally stored set value, it sends a corresponding signal to control the discharge module to terminate the discharge of the battery pack;

Step 4) Utilize the signal processor to record and store the data of the backward module battery with the lowest voltage value at the time of terminating the discharge of the battery pack obtained in step 2) or step 3);

Step 5) Utilize the signal processor to control the charging module to charge the battery pack after the discharge is terminated, and monitor the charging voltage state of the battery of the capacity lagging module through the data recording described in step 4), when the signal processor detects that the capacity lagging When the voltage of the module battery reaches the upper limit value Vm/V of constant voltage charging set by the internal storage, the real-time charged voltage of the battery pack at this moment is used as the constant voltage value, and a signal command is sent to control the charging module to charge the battery pack at a constant voltage. When the charging module uses the constant voltage value to charge the battery pack, when the current drops to the set value, it will be converted to floating charging at the set floating charging voltage value.

In the above technical solution, the step 4) further includes: using a display device to display the data in a steady state.

In the above technical solution, the step 5) charging the battery pack after terminating the discharge includes starting immediately when the external power source is called, starting after a certain time delay after the external power source is called, and waiting for the voltage of any module battery in the battery pack to drop to the specified level. It starts at the moment when the threshold value is stored in the signal processor. The upper limit value Vm/V of constant voltage charging set in the signal processor is determined by the type of the module battery of the battery pack, and the upper limit value Vm/V of constant voltage charging is preferably the national technical standard or the type of the industry The recommended value of the module battery.

The advantages of the power storage management and control device with a display device and its charge and discharge control method of the present invention are:

Using the power storage management and control device of the present invention to provide externally the real-time voltage data of the module batteries in the battery pack, and to collect and process the real-time voltage of each module battery, so as to control the module batteries with backward capacity from being deeply discharged or overcharged, Thereby prolonging the matching service life of the battery pack and reducing the cost of battery replacement.

Description of drawings

Fig. 1 is a schematic diagram of a signal monitoring structure of a battery pack by a conventional power storage management and control device.

Fig. 2a is a schematic diagram of the signal monitoring and control structure of the battery pack by the power storage management and control device in the present invention.

Fig. 2b is a simplified schematic diagram of the structure of the power storage management and control device shown in Fig. 2a.

Fig. 3 is a schematic diagram of a logic control structure of a power storage management and control device set in combination with a signal processor and an inspection module.

Fig. 4 is a schematic diagram of a logic control structure of a power storage management and control device in which a charging module and a discharging module are combined.

Fig. 5 is a schematic diagram of the logical control structure of the power storage management and control device with the combination of the charging module and the discharging module and the combination of the signal processor and the inspection module.

Fig. 6 is a schematic diagram of another logic control structure of an electric storage management and control device provided with a display module.

Drawing logo:

1. Battery pack 1a, first module battery 1b, second module battery

2. Signal processor 3. Inspection module 4. Display module

5. Discharging module 6. Charging module 7. Discharging load

9. Conventional discharge management system 10. Conventional charge management system

detailed description

A power storage management and control device with a display device and a charge and discharge control method thereof according to the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Figure 1 shows the simplest example of a fixed battery pack composed of a first module battery 1a and a second module battery 1b. The characteristic of conventional charge and discharge control is that the voltage at both ends of the two module batteries 1a/1b in series is The signal monitoring object, the conventional discharge management system 9 and the conventional charge management system 10 are both connected to both ends of the battery pack 1, this simple charge and discharge control management system does not really measure the actual discharge voltage of the two modular batteries 1a/1b, When the two modular batteries 1a/1b are unbalanced, one of the modular batteries must be deeply discharged.

Referring to Fig. 2a, in one embodiment, the power storage management and control device with a display device provided by the present invention includes: a patrol module 3, a signal processor 2, a discharge module 5, a charging module 6 and a display device 4, wherein, The battery pack 1 is composed of two first modular batteries 1a and second modular batteries 1b connected in series, and the serial interface of the first modular battery 1a and the second modular battery 1b is provided with a series tap terminal; the signal processor 2 has a voltage signal Logic processing function, its signal input terminal is connected to the voltage signal output terminal of the inspection module 3, and its three signal output terminals are respectively connected to the signal input terminals of the discharge module 5, the charging module 6 and the display device; the power supply input terminal of the discharge module 5 Connect the two ends of the battery pack 1, its power output end is connected to the discharge load 7 of the battery pack; the power output end of the charging module 6 is connected to the two ends of the battery pack 1, and its power input end is connected to the external charging power supply of the battery pack 1 (for clarity Indicates the logical control relationship, Fig. 2a does not indicate the connection between the discharge module 5/charging module 6 and the two ends of the battery pack 1); the three signal input terminals of the inspection module 3 are respectively connected to the first module battery 1a and the second module battery 1b in series Both ends and the series tap end. In this embodiment, the display module 4 uses a digital display, and the charging module 6 charges the battery pack 1 with the set float voltage value. When the battery pack 1 is discharged, the inspection module 3 discharges the two modular batteries 1a/1b The voltage data is inspected in real time and the data is dynamically stored in the readable internal storage of the signal processor 2, and the voltage data of the real-time discharge of the two modular batteries 1a/1b are dynamically displayed through the display device 4; The discharge voltage data of the module battery 1a/1b is compared with the internal storage data. When it is detected that the voltage value of any module battery drops to the threshold value set by the internal storage, the discharge module 5 is controlled to terminate the discharge of the battery pack; the discharge process In the process, the signal processor also monitors and records the module battery data with low discharge voltage, provides monitoring target basis for the next charging of the battery pack, and performs charging operation on the battery pack.

In the present invention, the power storage management and control device can be set separately from the conventional charging and discharging management system of the stationary battery pack, or can integrate part or all of its functions with the conventional charging and discharging management system; The discharge load 7 includes, for example, a communication station, a power storage system, and other devices that use a fixed battery pack; the fixed battery pack or/and module battery includes any secondary battery that can be recharged and used, such as a lithium battery , lead battery, nickel-zinc battery and metal hydrogen storage battery; the modular battery can be a single battery, or an integrated product formed by series/parallel connection of multiple single batteries inside, including a modular battery pack, a modular battery Group specifically refers to the connection method of internal or external series/parallel combination of more than two modular batteries.

The internal structure of the signal processor 2 generally includes a signal interface, a working circuit, and a number of functional sub-modules, such as internal storage, timing, and operation sub-modules. Due to the development of large-scale integrated circuits, there are a large number of integrated integration of signal logic processing on the market. Circuit devices, therefore, in the technical solution described in the present invention, only the functions required by the signal processor 2 are described, without any limitation on the internal structure of the module. The threshold value stored in the signal processor 2 is preferably determined by the national technical standard or industry recommended value of the type of modular battery 1a/1b. For example, the modular battery 1a/1b uses a lead storage battery with a nominal 2V, recommended by the industry standard The discharge lower limit is 1.80V.

The discharge module 5 has the function of being controlled by the discharge load 7 system and preferentially controlled by the signal processor 2. The discharge module 5 can be completely and independently designed, and can also be formed by adding a priority-controlled interface circuit to the conventional discharge management system, including setting as A logic power switch connected in series with the discharge output of the stationary battery pack. The discharge module 5 is controlled preferentially by the signal processor 2, and usually adopts 0/1 digital control logic. In one embodiment, the discharge module 5 is set separately from the discharge management system of the fixed battery pack, and the discharge module 5 is a part of the discharge management system. The priority control interface circuit is controlled by the 0/1 command output by the signal processor 2. The discharge module 5 works normally when it receives a "1" signal, and does not work when it receives a "0" signal. The power output form of the discharge module is arbitrary, including direct current, inverting to conventional alternating current, and the waveform and frequency of the current are arbitrary. The termination of discharge includes that the signal processor 2 controls the discharge module 5 to terminate the discharge of the battery pack 1, and the discharge load 7 terminates the discharge of the battery pack 1 during normal operation, because the fixed battery pack 1 is usually used as a backup or as a For the use of auxiliary power, the discharge load 7 gives priority to the termination of discharge of the battery pack 1, and the battery pack 1 is rarely fully discharged in actual use.

The charging module 6 has the functions of charging the battery pack 1 with a constant voltage and monitoring the charging current. The charging current/limited current value for charging the battery pack 1 is set in the charging module 6, and the charging constant voltage value is sent according to the signal processor 2. When the signal processor 2 detects that the charged voltage of the module battery with a backward capacity (the lowest discharge voltage value in the battery pack) rises to the internal storage set value, it will send the corresponding constant voltage charging program or constant voltage The charging signal command controls the charging module 6 to perform a charging operation on the real-time charging voltage of the battery pack 1 as a constant voltage value at this time; . The charging module 6 can be designed independently, or can be formed by adding a logic control interface that can be preferentially controlled by the signal processor 2 in a conventional charging management system.

The display device 4 is to provide information data for the external of the power storage management and control equipment, and is used to display the dynamic real-time discharge voltage value of each module battery and the battery pack 1. Using the data stored in the signal processor 2, it can also display each module battery and battery in a steady state. The real-time voltage value at the moment when group 1 terminates discharge. In the aforementioned embodiment shown in Figure 2a/2b, the display module 4 dynamically displays the real-time discharge voltage values of the two modular batteries 1a/1b and the battery pack 1, and can also be stabilized by using the data internally stored and recorded by the signal processor 2. Display the real-time voltage values of the two modular batteries 1a/1b and the battery pack 1 at the moment of termination of discharge; the termination of discharge includes the signal processor 2 sending a signal to control the discharge module 5 to terminate the discharge of the battery pack 1, and the fixed The discharge of the battery pack 1 is terminated under the control of the conventional discharge management system. By monitoring the voltage value data of the display module 4, the voltage status of each module battery in the fixed battery pack can be known in real time, which is conducive to timely maintenance by the user.

The integrated circuit module dedicated to voltage signal inspection in the market is generally composed of an A/D conversion chip and a microprocessor. The A/D conversion chip is responsible for converting the analog signal of the voltage into a digital signal. A module battery in the group is sampled, and the real-time voltage of a module battery can be accurately known by comparing the sampling time. Using this type of special inspection module, the first module battery 1a shown in Figure 2a can be detected from its output terminal and the real-time voltage of the second modular battery 1b, the precision of this kind of dedicated inspection signal processing integrated circuit module is generally higher, and there are more signal input terminals, which is suitable for real-time voltage inspection of many modular batteries. When the signal input terminal of the selected signal processor 2 is sufficient, the signal processing function of the voltage inspection can also be integrated in the signal processor, and the signal input terminal of the voltage inspection is generally designed as (n+1) input channels , n is the number of module batteries in the series battery pack. When working, the A/D conversion sub-module inside the signal processor is responsible for converting the analog signal of the voltage into a digital signal. The microprocessor controls the battery pack at different times. A module battery is sampled, and the real-time voltage of a module battery can also be accurately known by comparing the sampling time.

In an embodiment of the interface between the inspection module 3 and the battery pack, the inspection object is a 48V battery pack used in a conventional communication station. 25 external signal interfaces are respectively connected to 25 signal input ends of the inspection module. The inspection module selects a special chip for A/D conversion, and its signal output end is connected to the signal input end of the signal processor. A/D conversion The dedicated chip is responsible for converting the analog signal of the voltage into a digital signal, and the inspection module is controlled by the signal processor 2 to sample the module batteries in the battery pack at different times, and the real-time voltage of the module batteries can be obtained by comparing the sampling time. In addition to monitoring the real-time voltage of each module battery, the inspection module 3 can also simultaneously monitor the voltage at both ends of the fixed battery pack. In the following drawings and descriptions, the inspection schematic structure of the inspection module 3 and the modular batteries in the series battery pack 1 is not specifically marked, and the schematic diagram of the power storage management and control equipment with the inspection structure shown in Figure 2a is simplified as shown in Figure 2b.

The inspection module 3, the signal processor 2, the discharge module 5, the charging module 6 and the display device 4 of the power storage management and control equipment can be set separately, or can be selectively combined. The function of the voltage inspection module 3 is integrated in the signal Processor 2 is an embodiment of selective combination setting, as shown in Figure 3; similarly, the functions of discharging module 5 and charging module 6 can also share the integrated module setting, as shown in Figure 4 and Figure 5; even can All the functions of the inspection module 3 , the signal processor 2 , the discharge module 5 , and the charging module 6 including the display device 4 are set as an integrated module. The signal input terminal of the display module 4 can also be connected to the signal output terminal of the inspection module 3. This connection method can only dynamically display the real-time voltage values of the battery pack and each module battery, as shown in FIG. 6 .

The present invention also provides a charge and discharge control method of the power storage management and control device with a display device, the method is terminated when the real-time discharge voltage value of any module battery in the battery pack drops to the threshold value set by the internal storage The basis of discharge, and the charged voltage state of the battery pack with a lagging capacity in the battery pack is used as the monitoring object, and the signal processor controls the charging module to perform a flotation constant voltage charging operation on the entire pack of batteries. Referring to the power storage management and control equipment shown in Figures 2-6, the charging and discharging control method specifically includes the following steps:

Step 1) Use the charging module 6 to charge the battery pack 1 with the set floating charge voltage value.

Step 2) using the inspection module 3 to perform data inspection on the real-time voltage of each module battery or/and battery pack 1;

Step 3) Receive the data obtained by the inspection in step 2) through the signal processor 2, use the display device 4 to dynamically display the data obtained by the inspection, and combine the data obtained by the inspection with the internal data by the signal processor 2 Stored set value for comparison, when the signal processor 2 detects that the voltage of any module battery drops to the internally stored set value, send a corresponding signal to control the discharge module 5 to terminate the discharge of the battery pack 1;

Step 4) Utilize the signal processor 2 to record and store the data obtained in step 2) or step 3) of the lagging module battery with the lowest voltage value at the time of terminating the discharge of the battery pack 1;

Step 5) Utilize the signal processor 2 to control the charging module 6 to charge the battery pack 1 after the discharge is terminated, and through the data recording described in step 4), monitor the charging voltage state of the module battery whose capacity lags behind, when the signal processor 2 When it is detected that the voltage of the module battery with a backward capacity reaches the upper limit value Vm/V of the constant voltage charging set by the internal storage, the real-time charged voltage of the battery pack 1 at this moment is used as the constant voltage value, and a signal command is sent to control the charging module 6 to The battery pack 1 is charged at a constant voltage, and when the charging current of the battery pack 1 charged by the charging module 6 at the constant voltage value drops to a set value, it is converted to a float charge at a set float charge voltage value.

The conventional charging and discharging control equipment for the existing stationary battery packs is to monitor the voltage at both ends of the battery pack, resulting in deep discharge and overcharging of the module batteries with outdated capacity. The charge and discharge control method of the power storage management and control device of the present invention monitors the voltage state of each module battery, and terminates the discharge of the battery pack based on the discharge voltage of any module battery reaching the lower limit, so as to prevent deep discharge of the module batteries with backward capacity. The capacity of the above step 4) lags behind the data of the module battery, including its discharge voltage value or its position memory in the power supply circuit. The technical purpose of using the signal processor 2 to record this data is to provide voltage monitoring for the next charge of the battery pack 1 basis for the target.

In the above step 5), the signal processor 2 can set different charging logics after the discharge of the battery pack 1 is terminated. It is a conventional method to start immediately when the external power source is called; after the external power source is called, it is delayed for a certain time to start, such as a delay Restarting the charging program after 15 minutes (when the battery rebound voltage is stable) is a reasonable method to protect the battery; when the voltage of any module battery in the battery pack drops to the internal storage setting threshold, the signal can be used to start the charging program. The readable memory of the processor 2 adds the function of recording the discharge time, thereby displaying the discharge time data of the battery pack 1 through the display device 4, and improving the management function of the storage management and control equipment for the fixed battery pack.

Through the recording of the above step 4), the monitoring of the charging of the battery pack 1 by the signal processor 2 is based on the charged voltage of the module battery with a backward capacity, and decides to charge the entire battery pack when the charged voltage rises to Vm/V The constant voltage value, the Vm/V value is stored in the signal processor 2 and set according to the type of the module battery; for example, the battery pack 1 with 24 nominal 2V lead storage batteries connected in series for a fixed communication station, the nominal 2V The industry recommended value of constant voltage equalization charge for lead-acid batteries is 2.35V. When the signal processor 2 detects that the charging voltage of the module battery with a backward capacity rises to 2.35V, the real-time charging voltage of the battery pack 1 at this moment is taken as the constant voltage value , sending a signal to control the charging module 6 to charge the battery pack 1 with the constant voltage value; the logic condition of the constant voltage value transforming the floating charge voltage value is to drop the current for charging the battery pack 1 to the set value for the charging module 6, The setting value is selected between 0.01-0.03C/A, and the floating charge voltage depends on the type of battery, and its preferred value is well known to those skilled in the art. For example, the fixed battery pack of a communication station is usually a lead storage battery. The preferred value of the float voltage is 2.23V/cell.

The step 2) or step 3) includes using the signal processor 2 to record and store the real-time voltage data of the various modular batteries at the moment of termination of discharge, in order to display the various modular batteries in a steady state through the display device 4. The data enables users of stationary battery packs to know at a glance the capacity of the battery behind.

The following examples are only used to further illustrate the technical solutions of the present invention, and these technical solutions can be used alone, or can be added or combined with other mature technologies.

Example 1

Design a kind of power storage management and control equipment used by the fixed battery pack of communication station, the power storage management and control equipment includes inspection module 3, signal processor 2, discharge module 5, charging module 6 and display device 4, wherein, supporting the communication The fixed battery pack 1 used in the station is composed of 24 2V150Ah lead-acid batteries in series, and the serial interface of the 24 batteries is provided with a tap end, that is, the 48V battery pack has a total of 25 external signals by adding 23 tap ends to its two ends. The interface is respectively connected to 25 signal input ends of the inspection module 3; the signal input end of the signal processor 2 is connected to the signal output end of the inspection module 3, and its two signal output ends are respectively connected to the integrally designed discharge module 5 and charging The signal input terminal of the module 6; the display device 4 uses a digital display mode, and its signal input terminal is connected to another signal output terminal of the inspection module 3, and the control logic structure of each functional module is shown in Figure 6.

The power input end of the discharge module 5 is connected to both ends of the battery pack 1, and its power output end is connected to the discharge load 7 of the battery pack. The discharge module 5 is formed by adding a priority control interface circuit to the conventional discharge management system. The priority control interface circuit is controlled by Controlled by the 0/1 command output by the signal processor 2, the discharge module 5 works normally when receiving a "1" signal, and does not work when receiving a "0" signal. The power output terminal of the charging module 6 is connected to both ends of the battery pack 1, and its power input terminal is connected to the external charging power source of the battery pack 1. The charging module 6 has a number of charging programs built in, and the specific charging constant voltage value is controlled by the signal processor 2 The corresponding command output.

When the power storage management and control device is working, the display device 4 dynamically displays the real-time discharge voltage data of each module battery and the battery pack 1 to the outside of the power storage management and control device; when the discharge voltages of the 24 batteries are all higher than 1.80V, the signal processor 2 Send a "1" signal to the control discharge module 5, and the discharge module 5 is controlled by the manual operation device to discharge normally; the inspection module 3 obtains real-time discharge voltage data through the inspection of 24 lead-acid batteries, and the inspection cycle is 3 seconds. The real-time discharge voltage data of each battery obtained by the second inspection is sent to the signal processor 2, and the signal processor 2 compares it with the data set in the internal storage. When the signal processor 2 detects that any battery in the 24 lead-acid batteries When the voltage value drops to the 1.80V set in the internal storage, the discharge of the 48V battery pack is terminated by sending a "0" signal to the control discharge module 5; The battery that reaches 1.80V at the end of the discharge moment makes a record, and the record is temporarily stored in the internal storage of the signal processor 2 with the position signal in the power circuit, as the voltage monitoring target basis for the next charging of the battery pack 1 .

The charging program is set as follows: when the external power supply has electricity, the battery pack 1 does not discharge, and the charging module 6 floats the battery pack 1 with a voltage of 53.52V (the average value of the charging constant voltage of 24 batteries is 2.23V); 1 After the discharge occurs, as long as the external power supply has power, the signal processor 2 immediately starts the charging module 6 to charge the battery pack 1 with a constant current of 50A. When the signal processor 2 detects that the voltage is the lowest during the discharge process or the discharge voltage first reaches 1.80V When the voltage of the battery rises to 2.35V, a charging constant voltage value signal is sent to the charging module 6, and the charging module 6 is controlled to use the real-time voltage charged to the battery pack 1 at this moment as a constant voltage value. The battery pack 1 is charged, and when the charging current drops to 10.00A, the constant voltage value is converted into a float voltage value of 53.52V to charge the battery pack 1 .

The power storage management and control device of this embodiment dynamically displays the real-time discharge voltage values of each module battery and the battery pack 1 to the outside through the display device 4, so that the user can directly understand the status of the module batteries of the fixed battery pack, and it is easy to identify and replace them in maintenance and guarantee A battery with a backward capacity is beneficial to prolong the life of a stationary battery pack.

Example 2

The signal input terminal of the display module 4 described in Embodiment 1 is connected to the signal output terminal added by the signal processor 2, as shown in FIG. 4 . Through the internal storage programming of the signal processor 2, in addition to controlling the display module 4 to dynamically display the real-time discharge voltage values of the 24 batteries in the battery pack, it is also set to: when the discharge module 5 terminates the discharge of the battery pack, the display module 4 is fixed. The state displays the voltage values of 24 batteries at the moment of termination of discharge, the voltage value includes signal processor 2 sending a "0" signal to control discharge module 5 to terminate discharge (wherein the voltage of at least one battery drops to the value set in signal processor 2 1.80V), and the signal processor 2 sends a "1" signal state but the discharge module 5 is controlled by the conventional discharge management system to terminate the discharge of the fixed battery pack 1, so that the user of the communication station can control the fixed battery pack 1 The capacity behind the battery is clear at a glance.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all of them should be included in the scope of the present invention. within the scope of the claims.

Claims (7)

1. A power storage management and control device with a display device, used for charging and discharging control of a fixed battery pack (1), is characterized in that it includes a signal processor (2), an inspection module (3), a discharge module ( 5) a charging module (6) and a display device (4), the signal input end of the signal processor (2) is connected to the signal output end of the inspection module (3), and its signal output end is respectively connected to the discharge module (5) and the signal input end of the charging module (6); the display device (4) is used to provide information for the outside of the power storage management and control equipment, and its signal input end is connected with the signal processor (2) or the inspection module (3) is connected to the signal output terminal; the power input terminal of the discharge module (5) is connected to the two ends of the battery pack (1), and its power output terminal is connected to the discharge load (7) of the battery pack (1); charging The power output terminal of the module (6) is connected to the two ends of the battery pack (1), and its power input terminal is connected to the external charging power supply of the battery pack (1); the signal input terminal of the inspection module (3) is connected to the battery pack (1) The two ends and the serial tap ends of each module battery in the battery pack (1); the power storage management and control device performs conventional floating charging on the fixed battery pack (1), and performs set discharge control and discharge control on the battery pack (1). Charge control operation. 2. The power storage management and control device with display device according to claim 1, characterized in that, the electric control program for performing the charging control operation on the battery pack (1) is built in the charging module (6), and the charging module (6 ) The constant voltage value for charging the battery pack (1) is preferentially controlled by the signal instruction of the signal processor (2). 3. The power storage management and control device with a display device according to claim 1, characterized in that, the display modes of the display module (4) include: digital display, color light display, text display and voice prompt. 4. The power storage management and control device with display device according to claim 1, characterized in that, the signal processor (2), inspection module (3), discharge module (5), charging module (6) and The display devices (4) are set separately or selectively combined, or set by sharing an integrated module. 5. The charging and discharging control method based on the power storage management and control device with a display device according to any one of claims 1 to 4, the method comprising: Step 1) Use the charging module (6) to charge the battery pack (1) with the set float voltage value. Step 2) using the inspection module (3) to perform data inspection on the real-time voltage of each module battery or/and battery pack (1); Step 3) Receive the data obtained by the inspection in step 2) through the signal processor (2), use the display device (4) to dynamically display the data obtained by the inspection, and display the data obtained by the inspection by the signal processor (2). The detected data is compared with its internally stored set value, and when the signal processor (2) detects that the voltage of any module battery drops to the internally stored set value, it sends a corresponding signal to control the discharge module (5) to stop charging the The battery pack (1) discharges; Step 4) Utilize the signal processor (2) to record and store the data obtained in step 2) or step 3) of the lagging module battery with the lowest voltage value at the time of discharge of the terminated battery pack (1); Step 5) Utilize the signal processor (2) to control the charging module (6) to charge the battery pack (1) after the discharge is terminated, and monitor the charging voltage state of the battery of the capacity lagging module through the data recording described in step 4). , when the signal processor (2) detects that the voltage of the module battery with backward capacity reaches the upper limit value Vm/V of the constant voltage charging set by the internal storage, the real-time charged voltage of the battery pack (1) at this moment is used as the constant voltage value, send a signal instruction to control the charging module (6) to charge the battery pack (1) at a constant voltage, and when the charging current of the battery pack (1) charged by the charging module (6) with the constant voltage value drops to the set value, it is transformed into Float charge at the set float voltage value. 6. The method for controlling charge and discharge of a power storage management and control device with a display device according to claim 5, wherein said step 4) further comprises: using a display device (4) to display said data in a steady state. 7. The charging and discharging control method of the power storage management and control device with a display device according to claim 5, characterized in that, said step 5) charging the battery pack (1) after the discharge is terminated, including starting immediately when the external power supply is received 1. Delay the start for a certain time after the external power supply comes in and wait for the voltage of any module battery in the battery pack (1) to drop to the preset threshold value stored in the signal processor (2).