Storage battery digital monitoring system capable of testing internal resistance of battery

Abstract

The invention discloses a storage battery digital monitoring system capable of testing the internal resistance of a battery, and relates to the technical field of storage battery monitoring, the storage battery digital monitoring system comprises a monitoring control terminal and a monitoring unit, and the input port of the monitoring control terminal is electrically connected with a collection module. According to the storage battery digital monitoring system capable of testing the internal resistance of the battery, the monitoring control terminal can test the storage battery bodies at regular intervals, the monitoring unit can collect parameters of each group of storage battery bodies after testing, and when the battery discharges, the feed protection unit feeds back the electric quantity of the battery pack to a power grid through an inversion grid-connected technology, so that the storage battery bodies are protected. When the battery is charged, switching is carried out through the discharging switching module, and a charging protection module arranged in the discharging switching module can realize protection, constant-current charging, constant-voltage charging and floating charging management at the initial charging stage of the battery, and prevents the battery from being damaged when the battery is charged. The rectifier is impacted by large current of the battery.

Description

Technical Field

[0001] The invention relates to the technical field of battery monitoring, in particular to a battery digital monitoring system capable of testing the internal resistance of the battery. Background Art

[0002] Battery refers to all chemical energy batteries that can be recharged and used repeatedly after a certain amount of power is used. The battery digital monitoring system can collect key parameters such as battery voltage, current, temperature, etc., and analyze the data to detect potential problems in time and take corresponding measures. Such a system is crucial to ensure the stability and reliability of the power system, especially in key applications such as data centers, communication base stations, and emergency power systems.

[0003] CN117335518A intelligent battery monitoring system, through the combination of core modules and batteries, makes its external characteristics equivalent to those of a good battery in form, avoiding the avalanche effect of short-board batteries. At the same time, the remote monitoring platform provides users with information such as the site's location, position, system composition and main working parameters, completes various data classification storage, data statistics, data analysis and curve comparison, battery status early warning and alarm, maintenance task notification, etc., and realizes online maintenance management in the office. By providing battery sensor accuracy and intelligent algorithms, it realizes static and dynamic monitoring of group voltage, single cell voltage, single cell internal resistance and single cell temperature, provides battery health diagnosis and performance guarantee, so as to ensure the safety and reliability of the power supply system.

[0004] The battery intelligent monitoring system in the above scheme is difficult to maintain constant current discharge of the battery pack when performing discharge test on the battery, which will cause high temperature of the discharge equipment. In addition, when the battery is exhausted and charged instantly, it is difficult to perform constant voltage charging and floating charge management on the battery pack. The rectifier will be impacted by the large current of the battery, causing damage. Summary of the invention

[0005] The purpose of the present invention is to provide a digital battery monitoring system capable of testing the internal resistance of the battery, so as to solve the problem that the existing digital battery monitoring system mentioned in the background art is difficult to ensure the safety of the battery when testing the battery charge and discharge.

[0006] To achieve the above object, the present invention provides the following technical solution: a digital battery monitoring system capable of testing the internal resistance of a battery, comprising a monitoring control terminal and a monitoring unit, wherein the input port of the monitoring control terminal is electrically connected to a collection module, and the output end of the monitoring control terminal is wirelessly connected to a remote nuclear capacity management platform, The output interface of the collection module is electrically connected to a monitoring unit, and the input interface of the monitoring unit is electrically connected to a battery body. The monitoring unit is used to detect various operating conditions of the battery body. The output interface on one side of the monitoring and control terminal is connected to a display control module for displaying various conditions of the battery body through wires. The input interface of the battery body is electrically connected to a feed protection unit. The output end of the battery body is electrically connected to an inverter discharge module for ensuring the stability of the DC side input current. The output interface of the inverter discharge module is electrically connected to a discharge load module, and the discharge load module is made of aviation alloy resistance material. The output interface of the battery body is electrically connected to the input interface of the discharge switching module through wires.

[0007] Preferably, the monitoring unit includes a current monitoring module, a capacity monitoring module, a temperature monitoring module, an internal resistance monitoring module and a voltage monitoring module; the feed protection unit includes a bidirectional filtering module, a load monitoring module and an over- and under-voltage protection module; and the temperature monitoring module is used to monitor the temperature of the battery pole.

[0008] Preferably, the discharge switching module is used to control the switching of the charging and discharging bus lines of the battery pack, and the input interface of the discharge switching module is electrically connected to a charging protection module for protecting the battery in the initial charging stage.

[0009] Preferably, the output end of the remote nuclear capacity management platform is wirelessly connected to a login authentication unit for identifying the identity of the registrant, and the login authentication unit includes a UKey authentication module and a face recognition module.

[0010] Preferably, the output interface of the login authentication unit is wirelessly connected to a command sending unit, and the command sending unit includes a two-factor authentication module, a command signature module and a key verification module.

[0011] Preferably, the output end of the dual-factor authentication module is wirelessly connected to the instruction signature module, and the output end of the instruction signature module is wirelessly connected to the output end of the key verification module.

[0012] Preferably, the key verification module is used for public key and private key verification of the dispatching end and the station end, and the output end of the instruction sending unit is wirelessly connected to a remote discharge core capacity test unit, and the remote discharge core capacity test unit includes a battery discharge test module and a battery positioning module.

[0013] Preferably, the battery positioning module is installed on a single group of batteries, and the output end of the remote discharge nuclear capacity test unit is wirelessly connected to an alarm unit for prompting staff, and the alarm unit includes an alarm information storage module, an alarm classification module, an alarm analysis module and an alarm module.

[0014] Preferably, the alarm information storage module is responsible for storing historical alarm information, and the output end of the alarm information storage module is wirelessly connected to the input end of the alarm classification module.

[0015] Preferably, the input end of the alarm analysis module receives data sent from the alarm information storage module and the alarm classification module, and the output end of the alarm analysis module transmits the analysis result to the alarm module.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The digital battery monitoring system capable of testing the internal resistance of the battery, the monitoring control terminal can perform regular tests on the battery body, the monitoring unit can collect the parameters of each battery body after the test, when the battery is discharged, the power feeding protection unit feeds back the battery power to the power grid through the inverter grid-connected technology, and ensures that the battery pack discharges to the outside at a constant current to prevent the discharge equipment from having a high temperature, when the battery is charged, the discharge switching module controls the switching of the charging and discharging bus lines of the battery pack, the charging protection module built into the discharge switching module can realize the protection of the initial charging of the battery, constant current charging, constant voltage charging and floating charge management, and prevent the rectifier from being impacted by the large current of the battery during instantaneous charging after the battery is depleted, so that the internal resistance of the battery can be tested regularly through the above operations, and the safety of the battery pack during charging and discharging can be guaranteed.

[0017] 2. The digital battery monitoring system capable of testing the internal resistance of the battery can log in to the remote capacity management platform when conducting remote testing on the battery. The login authentication unit will verify the login user. After successful login, the instruction sending unit can send an operation instruction to the monitoring and control terminal. After the instruction is successfully sent, the battery can be tested through the battery discharge test module in the remote discharge capacity test unit. At the same time, the battery with insufficient capacity can be accurately located through the battery positioning module, and the platform will accurately warn the network management personnel of the problem of the battery. The alarm unit will compare the test information sent by the remote discharge capacity test unit with the historical alarm information in the alarm information storage module. After the comprehensive alarm classification module, the alarm analysis module will classify the battery body with problems, and transmit the classification information to the alarm module for classification alarm, and provide technical reminders to the user. In this way, the monitoring and control terminal can be remotely controlled and the battery can be remotely tested through the above operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the system of the present invention; Figure 2 It is a schematic diagram of the monitoring unit of the present invention; Figure 3 This is a schematic diagram of a feeding protection unit of the present invention; Figure 4This is a schematic diagram of a login authentication unit of the present invention; Figure 5 This is a schematic diagram of the instruction sending unit of the present invention; Figure 6 This is a schematic diagram of a remote discharge nuclear capacity test unit of the present invention; Figure 7 This is a schematic diagram of an alarm unit of the present invention; Figure 8 It is a schematic diagram of the inverter core capacitor charging and discharging circuit of the present invention; Fig. 9 This is a schematic diagram of the intelligent bus tie unit system of the present invention.

[0019] In the figure: 1. Monitoring and control terminal; 2. Remote nuclear capacity management platform; 3. Battery body; 4. Monitoring unit; 41. Current monitoring module; 42. Capacity monitoring module; 43. Temperature monitoring module; 44. Internal resistance monitoring module; 45. Voltage monitoring module; 5. Collection module; 6. Display control module; 7. Feed protection unit; 71. Bidirectional filtering module; 72. Load monitoring module; 73. Over-voltage and under-voltage protection module; 8. Inverter discharge module; 9. Discharge load module; 10. Intelligent busbar electric switch; 11. Discharge switching module block; 12. charging protection module; 13. login authentication unit; 131. UKey authentication module; 132. face recognition module; 14. instruction sending unit; 141. two-factor authentication module; 142. instruction signature module; 143. key verification module; 15. remote discharge core capacity test unit; 151. battery discharge test module; 152. battery positioning module; 16. alarm unit; 161. alarm information storage module; 162. alarm classification module; 163. alarm analysis module; 164. alarm module. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 3 The present invention provides a technical solution: a digital battery monitoring system capable of testing the internal resistance of a battery, comprising a monitoring control terminal 1 and a monitoring unit 4, wherein the input port of the monitoring control terminal 1 is electrically connected to a collection module 5, and the output end of the monitoring control terminal 1 is wirelessly connected to a remote nuclear capacity management platform 2, The output interface of the collection module 5 is electrically connected to the monitoring unit 4, and the input interface of the monitoring unit 4 is electrically connected to the battery body 3. The monitoring unit 4 is used to detect various operating states of the battery body 3. The output interface on one side of the monitoring control terminal 1 is connected to the display control module 6 for displaying various states of the battery body 3 through wires. The input interface of the battery body 3 is electrically connected to the feeding protection unit 7. The output end of the battery body 3 is electrically connected to the inverter discharge module 8 for ensuring the stability of the DC side input current. The output interface of the inverter discharge module 8 is electrically connected to the discharge load module 9, and the discharge load module 9 is made of aviation alloy resistance material. The output interface of the battery body 3 is electrically connected to the input interface of the discharge switching module 11 through wires; The monitoring unit 4 includes a current monitoring module 41, a capacity monitoring module 42, a temperature monitoring module 43, an internal resistance monitoring module 44 and a voltage monitoring module 45. The feed protection unit 7 includes a bidirectional filtering module 71, a load monitoring module 72 and an over-voltage and under-voltage protection module 73. The temperature monitoring module 43 is used to monitor the temperature of the battery pole; the discharge switching module 11 is used to control the switching of the charging and discharging bus lines of the battery pack, and the input interface of the discharge switching module 11 is electrically connected to a charging protection module 12 for protecting the battery in the initial charging stage.

[0022] In specific implementation, the battery digital monitoring system that can test the battery internal resistance, the monitoring control terminal 1 can perform regular tests on the battery body 3, and after the test, it is necessary to collect the status data after the test. The monitoring unit 4 is set in each group of battery bodies 3. The temperature monitoring module 43, the internal resistance monitoring module 44 and the voltage monitoring module 45 in the monitoring unit 4 can monitor the voltage and current, capacity, rectifier voltage, current, ambient temperature and each battery voltage, internal resistance and negative pole temperature of the online monitoring battery group. The monitoring unit 4 has a built-in filtering device with strong anti-interference ability to ensure the consistency of the floating charge voltage. The collection module 5 will collect the monitoring units of each group. The data measured in the element 4 are collected and input into the monitoring and control terminal 1 to complete the test of the internal resistance and other parameters of multiple groups of batteries. When the battery is discharged, the feed protection unit 7 feeds the battery group power back to the power grid through the inverter grid-connected technology, and ensures that the battery group discharges to the outside with a constant current to prevent the discharge equipment from having a high temperature. The bidirectional filtering module 71 and the over-voltage and under-voltage protection module 73 in the feed protection unit 7 can prevent the main power clutter from interfering with the inverter module, and at the same time correct the quality of the inverter output. When over-voltage and under-voltage occur, active protection is formed, with fast response speed, safety and reliability. The load monitoring module 72 can perform real-time monitoring of the main load and the feed branch load. Real-time monitoring can realize accurate monitoring of the load, and prevent the inverter load from being greater than the main circuit load, which would cause safety hazards. After the DC power supply is input, the inverter discharge module 8 undergoes DCBoost voltage boosting and LLC isolation conversion, and transmits energy to the grid through high-frequency active inverter. The DCBoost circuit is used to ensure the stability of the DC side input current and reduce the current ripple. The discharge load module 9 adopts PWM technology to achieve constant discharge current. When the battery is charging, the discharge switching module 11 controls the switching of the battery pack charging and discharging bus lines. The discharge switching module 11 adopts the principle of dual-diode unidirectional conduction to achieve seamless switching and ensure that the battery is online in real time. The battery can be fully discharged and charged online. The charging protection module 12 built into the discharge switching module 11 can realize the protection of the initial charging of the battery, constant current charging, constant voltage charging and floating charge management, to prevent the rectifier from being impacted by the large current of the battery during instantaneous charging after the battery is exhausted. The intelligent busbar electric switch 10 ensures that the two sections of the busbar work independently of each other. When the voltage of any section of the busbar is insufficient, the other section of the busbar seamlessly switches to supply power to the pressure-losing section of the busbar, realizing the related backup of the two sections of the busbar, solving the problem that one group of batteries fails and the other group of batteries can be seamlessly switched to standby. In this way, the internal resistance of the battery can be tested regularly through the above operation, and the safety of the battery pack during charging and discharging is guaranteed.

[0023] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7The output end of the remote nuclear capacity management platform 2 is wirelessly connected to a login authentication unit 13 for identifying the identity of the login user, and the login authentication unit 13 includes a UKey authentication module 131 and a face recognition module 132; the output interface of the login authentication unit 13 is wirelessly connected to an instruction sending unit 14, and the instruction sending unit 14 includes a dual-factor authentication module 141, an instruction signature module 142 and a key verification module 143; the output end of the dual-factor authentication module 141 is wirelessly connected to the instruction signature module 142, and the output end of the instruction signature module 142 is wirelessly connected to the output end of the key verification module 143; the key verification module 143 is used for public key and private key verification of the scheduling end and the station end, and the output end of the instruction sending unit 14 is wirelessly connected to a remote discharge nuclear capacity test unit 15, and the remote discharge nuclear capacity test unit 15 includes a battery discharge test module 151 and a battery positioning module 152; the battery positioning module 152 is installed on a single group of batteries, and the output end of the remote discharge capacity test unit 15 is wirelessly connected to an alarm unit 16 for prompting the staff, and the alarm unit 16 includes an alarm information storage module 161, an alarm classification module 162, an alarm analysis module 163 and an alarm module 164; the alarm information storage module 161 is responsible for storing historical alarm information, and the output end of the alarm information storage module 161 is wirelessly connected to the input end of the alarm classification module 162; the input end of the alarm analysis module 163 receives data sent from the alarm information storage module 161 and the alarm classification module 162, and the output end of the alarm analysis module 163 transmits the analysis result to the alarm module 164.

[0024] In specific implementation, the battery digital monitoring system that can test the battery internal resistance can log in to the remote capacity management platform 2 when conducting remote testing on the battery. The remote capacity management platform 2 will verify the registrant through the login authentication unit 13. After the UKey authentication module 131 is connected to the computer through the USB interface, password verification can be performed, and the face recognition module 132 can perform secondary verification on the registrant to improve the security of the login. After a successful login, the operation instruction can be sent to the monitoring and control terminal 1 through the instruction sending unit 14. When issuing key control commands, the two-factor authentication module 141 authentication authorization is also required to control the site equipment. All instructions use the national secret asymmetric algorithm SM2 signature function. The dispatching end and the station end have public and private keys for verification, which greatly improves the system network security. After the instruction is sent successfully, the remote discharge capacity test unit The battery discharge test module 151 in 15 tests the battery, replacing the traditional manual discharge test maintenance work, realizing remote fully automatic safe and energy-saving battery automatic discharge test, and intuitively displaying the charging and discharging process. At the same time, the battery with insufficient capacity can be accurately located through the battery positioning module 152, and the platform accurately alerts the network management personnel of the problem of the battery. The alarm unit 16 will compare the test information sent by the remote discharge capacity test unit 15 with the historical alarm information in the alarm information storage module 161. After the comprehensive alarm classification module 162, the alarm analysis module 163 will classify the battery body 3 with problems, and transmit the classification information to the alarm module 164, perform a graded alarm, and provide technical reminders to the user. In this way, the monitoring and control terminal 1 can be remotely controlled and the battery can be remotely tested through the above operations.

[0025] See also Figure 8 , assuming that the battery group 1 is discharged first, the bus tie switch KM composed of the live operating mechanism DC circuit breaker is closed first, and then the normally closed contactor KO1 of the switching device 1 is opened, the discharge switch KD1 is closed, and the inverter starts the inverter output to maintain the set DC current inverter discharge, and the inverter output power is consumed by the station power equipment; Assume that the battery pack 1 has completed the core capacity discharge, the discharge is over, the inverter stops outputting, the discharge switch KD1 is disconnected, and it is left to stand for one minute. The charging switch KC1 is closed, and the charger pre-charges the battery through the current limiting charging module. When the current is below the floating charge current, the main coupling switch KM is disconnected, and then the normally closed contactor KO1 is restored to the normally closed state, and then the charging switch KC1 is disconnected, and the core capacity is completed.

[0026] See also Fig. 9Rectifier 1 outputs 243V to the outside, and rectifier 2 outputs 243V to the outside. Rectifier 1 drops the voltage by 2V through the intelligent bus coupler S1. Since the output voltage of rectifier 2 is higher than the output voltage of S1, it is in standby state. Rectifier 2 drops the voltage by 2V through the intelligent bus coupler S2. Since the output voltage of rectifier 1 is higher than the output voltage of S2, it is in standby state. When rectifier 1 loses power, the rectifier output voltage decreases, and S2 starts working without delay to supply power to the outside. When rectifier 2 loses power, the rectifier output voltage decreases, and S1 starts working without delay to the outside. Ensure that the dual power supply system has no delay and is mutually backed up and used.

[0027] In summary, the monitoring and control terminal 1 can perform regular tests on the battery body 3 and collect the parameters of the battery body 3 after the test through the monitoring unit 4, so as to complete the monitoring of the battery status. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A digital battery monitoring system capable of testing battery internal resistance, comprising a monitoring control terminal (1) and a monitoring unit (4), wherein an input port of the monitoring control terminal (1) is electrically connected to a collection module (5), and an output port of the monitoring control terminal (1) is wirelessly connected to a remote core capacity management platform (2), characterized in that: The output interface of the collection module (5) is electrically connected to a monitoring unit (4), the input interface of the monitoring unit (4) is electrically connected to a battery body (3), the monitoring unit (4) is used to detect various operating states of the battery body (3), the output interface of one side of the monitoring control terminal (1) is connected to a display control module (6) for displaying various states of the battery body (3) through a wire, the input interface of the battery body (3) is electrically connected to a feed protection unit (7), the output end of the battery body (3) is electrically connected to an inverter discharge module (8) for ensuring the stability of the DC side input current, the output interface of the inverter discharge module (8) is electrically connected to a discharge load module (9), and the discharge load module (9) is made of aviation alloy resistance material, and the output interface of the battery body (3) is electrically connected to the input interface of the discharge switching module (11) through a wire.

2. A battery digital monitoring system capable of testing battery internal resistance according to claim 1, characterized in that: The monitoring unit (4) comprises a current monitoring module (41), a capacity monitoring module (42), a temperature monitoring module (43), an internal resistance monitoring module (44) and a voltage monitoring module (45); the feeding protection unit (7) comprises a bidirectional filtering module (71), a load monitoring module (72) and an over-voltage and under-voltage protection module (73); and the temperature monitoring module (43) is used to monitor the temperature of the battery pole.

3. A battery digital monitoring system capable of testing battery internal resistance according to claim 1, characterized in that: The discharge switching module (11) is used to control the switching of the charging and discharging bus lines of the battery pack, and the input interface of the discharge switching module (11) is electrically connected to a charging protection module (12) for protecting the battery in the initial charging stage.

4. A battery digital monitoring system capable of testing battery internal resistance according to claim 1, characterized in that: The output end of the remote nuclear capacity management platform (2) is wirelessly connected to a login authentication unit (13) for identifying the identity of a login user, and the login authentication unit (13) comprises a UKey authentication module (131) and a face recognition module (132).

5. A battery digital monitoring system capable of testing battery internal resistance according to claim 4, characterized in that: The output interface of the login authentication unit (13) is wirelessly connected to a command sending unit (14), and the command sending unit (14) comprises a dual-factor authentication module (141), a command signature module (142) and a key verification module (143).

6. A battery digital monitoring system capable of testing battery internal resistance according to claim 5, characterized in that: The output end of the dual-factor authentication module (141) is wirelessly connected to the instruction signature module (142), and the output end of the instruction signature module (142) is wirelessly connected to the output end of the key verification module (143).

7. A battery digital monitoring system capable of testing battery internal resistance according to claim 6, characterized in that: The key verification module (143) is used for public key and private key verification of the dispatching end and the station end. The output end of the instruction sending unit (14) is wirelessly connected to a remote discharge core capacity test unit (15). The remote discharge core capacity test unit (15) includes a battery discharge test module (151) and a battery positioning module (152).

8. A battery digital monitoring system capable of testing battery internal resistance according to claim 7, characterized in that: The battery positioning module (152) is installed on each group of batteries. The output end of the remote discharge nuclear capacity test unit (15) is wirelessly connected to an alarm unit (16) for prompting staff. The alarm unit (16) includes an alarm information storage module (161), an alarm classification module (162), an alarm analysis module (163) and an alarm module (164).

9. A battery digital monitoring system capable of testing battery internal resistance according to claim 8, characterized in that: The alarm information storage module (161) is responsible for storing historical alarm information, and the output end of the alarm information storage module (161) is wirelessly connected to the input end of the alarm classification module (162).

10. A battery digital monitoring system capable of testing battery internal resistance according to claim 9, characterized in that: The input end of the alarm analysis module (163) receives data sent from the alarm information storage module (161) and the alarm classification module (162), and the output end of the alarm analysis module (163) transmits the analysis result to the alarm module (164).

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