Intelligent nickel-metal hydride battery management system

Abstract

The utility model discloses an intelligent nickel-metal hydride battery management system. A charging relay, a fuse and a shunt are connected in series between the positive electrode end of a UPS host DC port and the positive electrode end of a battery pack module; two ends of the charging relay are connected in parallel with freewheeling diodes; the BMS battery management system comprises a main controller; a first voltage detection module is arranged between the main controller and the output end of the charging relay; a second voltage detection module is arranged between the main controller and the negative electrode of the battery pack module; and the main controller is connected with the diverter. The system has the advantages that the automation operation degree is high, the labor intensity of workers can be effectively reduced, and the operation safety of the UPS system is improved; the main controller controls the charging and discharging processes of the UPS host and the nickel-metal hydride battery according to the monitoring result, when the battery management system monitors that the system operates abnormally, an alarm is given in time through the fault indication module, a worker is reminded of maintenance, the system operation efficiency is high, and the emergency requirement can be met.

Description

Technical field:

[0001] The utility model relates to the technical field of battery management, in particular to an intelligent nickel-hydrogen battery management system. Background technology:

[0002] UPS uninterruptible power supply is the fundamental guarantee for the normal operation of railway vehicle operation safety monitoring system equipment. Its basic operation process is as follows: when the mains is available, the UPS host rectifies the mains into direct current and charges the battery pack. When the BMS battery management system determines that the battery pack is full, the BMS battery management system disconnects the charging relay and cuts off the charging circuit to ensure that the battery pack will not be overcharged; when the mains is disconnected, the battery pack provides direct current to the UPS host, and the UPS host provides power to the equipment through the inverter circuit until the battery pack is discharged. Since nickel-metal hydride batteries are higher than traditional lead-acid and nickel-cadmium batteries in terms of energy density, rate performance, high and low temperature performance, cycle life, and safety, the current UPS uninterruptible power supply system is gradually equipped with nickel-metal hydride batteries and battery management systems to provide guarantee for the operation of the entire UPS.

[0003] In order to monitor the status of the nickel-metal hydride battery pack, the current UPS system is equipped with a BMS battery management system. However, the current BMS battery management system cannot monitor the operating environment and faults of the UPS system and battery pack in real time, and requires manual regular maintenance. When the system fails and needs to be repaired, it mainly relies on manual on-site inspection and measurement, which is inefficient and cannot meet emergency use. Therefore, it is necessary to develop an integrated intelligent management system to monitor the operating status and operating environment of the UPS host and nickel-metal hydride batteries in real time, and to alarm in time when a fault occurs. Utility model content:

[0004] The utility model aims to provide an intelligent battery management system which can monitor the battery status, system operation status and operation environment in real time.

[0005] The utility model is implemented by the following technical scheme: an intelligent nickel-hydrogen battery management system, comprising a UPS host, a BMS battery management system, and a battery pack module, wherein the positive terminal of the UPS host DC port is connected to the positive terminal of the battery pack module, the negative terminal of the UPS host DC port is connected to the negative terminal of the battery pack module, and the BMS battery management system is connected to the battery pack module in communication;

[0006] A charging relay, a fuse, and a shunt are connected in series between the positive terminal of the UPS host DC port and the positive terminal of the battery module;

[0007] A freewheeling diode is connected in parallel at both ends of the charging relay; the anode of the freewheeling diode is connected to the output end of the relay, and the cathode of the freewheeling diode is connected to the input end of the relay;

[0008] The BMS battery management system includes a main controller; the main controller is connected to the display for communication, and the main controller is connected to the UPS host for communication;

[0009] An adhesion detection module is arranged between the main controller and the input end of the charging relay; a first voltage detection module is arranged between the main controller and the output end of the charging relay; a second voltage detection module is arranged between the main controller and the negative pole of the battery pack module; and the main controller is connected to the shunt.

[0010] Preferably, an ambient temperature detection module is further included, and the input end of the main controller is connected to the ambient temperature detection module.

[0011] Preferably, it further comprises a fault indication module, wherein the fault indication module is connected to the output end of the main controller.

[0012] Preferably, the BMS battery management system is powered by a DC / DC converter, the positive pole of the DC input port of the DC / DC converter is connected in series between the charging relay and the fuse, and the negative pole of the DC input port of the DC / DC converter is connected to the connecting end of the negative end of the battery pack module and the negative end of the UPS host DC port.

[0013] Preferably, the BMS battery management system includes a slave controller connected to the master controller; a cell temperature detection module and a cell voltage detection module are provided in the battery pack module; the slave controller is connected to the cell temperature detection module and the cell voltage detection module; and the slave controller is connected to the fault indication module.

[0014] The advantages of the utility model are as follows: the degree of automated operation is high, which can effectively reduce the intensity of manual work and improve the operational safety of the UPS system; the battery management system monitors the operating status and operating environment of the nickel-hydrogen battery pack in real time through the voltage, current, temperature and adhesion detection modules, and the main controller controls the charging and discharging process of the UPS host and the nickel-hydrogen battery according to the monitoring results. When the battery management system detects that the system is operating abnormally, the fault indication module will promptly issue an alarm to remind the staff to carry out maintenance. The system has high operating efficiency and can meet emergency needs. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 This is a circuit connection diagram of Example 1 of the utility model.

[0018] Figure 3 This is a wiring diagram of the main controller of Example 1.

[0019] Figure 4 This is a schematic diagram of the structural connection of Example 2.

[0020] UPS host 1, BMS battery management system 2, main controller 2.1, slave controller 2.2, battery pack module 3, battery pack 3.1, display 4, monitoring module 5, UPS remote operation and maintenance system 6, charging relay 7, fuse 8, shunt 9, freewheeling diode 10, DC / DC converter 11, adhesion detection module 12, first voltage detection module HV1, second voltage detection module HV2, ambient temperature detection module T1, fault indication module 13, single cell temperature detection module T0, single cell voltage detection module HV0. Specific implementation method:

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 The figure shows the overall structure diagram of the intelligent nickel-hydrogen battery management system of the utility model, which includes a UPS host 1, a BMS battery management system 2, a battery pack module 3, and a display 4.

[0023] An AC port of the UPS host 1 is connected to the mains to form a loop, another AC port of the UPS host 1 is connected to the load to form a loop, the positive terminal of the UPS host DC port is connected to the positive terminal of the battery module 3, and the negative terminal of the UPS host DC port is connected to the negative terminal of the battery module 3. The BMS battery management system 2 is respectively connected to the monitoring module 5, the UPS host 1 and the battery module 3 for communication. The BMS battery management system 2 obtains the monitoring information of the monitoring module 5 in real time, and controls the charging and discharging process of the battery module 3 by the UPS host 1.

[0024] The BMS battery management system 2 is communicatively connected to the display 4, and the information and control process monitored by the BMS battery management system 2 are displayed through the display 4. Furthermore, the information of the display 4 can be transmitted to the UPS remote operation and maintenance system 6 for use by remote operation and maintenance personnel.

[0025] Embodiment 1:

[0026] like Figure 2 The circuit connection diagram of the intelligent nickel-metal hydride battery management system of this embodiment is shown. Specifically, a main controller 2.1 is provided in the BMS battery management system 2; the main controller 2.1 is communicated with the battery pack module 3 and the UPS host 1 respectively, and the charging and discharging process of the battery pack module 3 and the UPS host 1 is controlled by the main controller 2.1.

[0027] Among them, a charging relay 7, a fuse 8, and a shunt 9 are connected in series between the positive end of the UPS host DC port and the positive end of the battery module 3; a freewheeling diode 10 is connected in parallel at both ends of the charging relay 7; the anode of the freewheeling diode 10 is connected to the output end of the charging relay 7, and the cathode of the freewheeling diode 10 is connected to the input end of the charging relay 7. The charging process of the UPS host 1 to the battery module 3 is controlled by the charging relay 7, and the discharging process of the battery module 3 to the UPS host 1 is controlled by the freewheeling diode 10.

[0028] The BMS battery management system 2 is powered by a DC / DC converter 11. The positive pole of the DC input port of the DC / DC converter 11 is connected in series between the charging relay 7 and the fuse 8, and the negative pole of the DC input port of the DC / DC converter 11 is connected to the negative end of the battery pack module 3 and the negative end of the UPS host DC port.

[0029] An adhesion detection module 12 is provided between the main controller 2.1 and the input end of the charging relay 7; a first voltage detection module HV1 is provided between the main controller 2.1 and the output end of the charging relay 7; a second voltage detection module HV2 is provided between the main controller 2.1 and the negative pole of the battery module 3; and the main controller 2.1 is connected to the shunt 9. The operation state of the charging relay 7 is monitored through the adhesion detection module 12, the positive terminal voltage of the battery module 3 is monitored through the first voltage detection module HV1, the negative terminal voltage of the battery module 3 is monitored through the second voltage detection module HV2, and the charge and discharge current of the battery module 3 is monitored through the shunt 9.

[0030] The adhesion detection module 12, the voltage detection module, and the current divider 9 can all be mature existing products in the field. The main controller 2.1 is integrated on a circuit board. The pins of the circuit board are as follows: Figure 3 shown.

[0031] Furthermore, the intelligent nickel-metal hydride battery management system of this embodiment also includes an ambient temperature detection module T1 and a fault indication module 13 . The input end of the main controller 2.1 is connected to the ambient temperature detection module T1 , and the output end of the main controller 2.1 is connected to the fault indication module 13 .

[0032] Embodiment 2:

[0033] The overall structure of this embodiment is the same as that of embodiment 1, except that a plurality of slave controllers 2.2 connected to the master controller 2.1 are provided in the BMS battery management system 2, such as Figure 4 shown.

[0034] Each battery pack 3.1 of the battery group module 3 is provided with a single cell temperature detection module T0 and a single cell voltage detection module HV0; each slave controller 2.2 is connected to the single cell temperature detection module T0 and the single cell voltage detection module HV0 corresponding to a battery pack 3.1; the slave controller 2.2 is connected to the fault indication module 13.

[0035] The operating temperature and voltage of each battery pack 3.1 are monitored by the single cell temperature detection module T0 and the single cell voltage detection module HV0. When the single cell temperature detection module T0 and the single cell voltage detection module HV0 detect that the operating state of the battery pack 3.1 is abnormal, the slave controller 2.2 controls the fault indication module 13 to send an alarm signal.

[0036] Instructions for use: The nickel-hydrogen battery management system of the utility model has the functions of monitoring the total voltage, total current and ambient temperature of the UPS system, and also has the functions of monitoring the overvoltage, undervoltage, overcurrent and overtemperature of the single battery pack 3.1.

[0037] The collected data of each battery pack 3.1 is transmitted to the slave controller 2.2 corresponding to each battery pack 3.1 by means of the CAN bus through the single temperature detection module T0 and the single voltage detection module HV0. Multiple slave controllers 2.2 are uploaded to the master controller 2.1 of the BMS battery management system 2 in parallel by means of the CAN bus. The adhesion detection module 12 monitors the contact operation status of the relay, the first voltage detection module HV1 and the second voltage detection module HV2 monitor the total voltage of the battery pack module 3, and the shunt 9 monitors the total current of the battery pack module 3.

[0038] The DC / DC converter 11 supplies power to the BMS battery management system 2. When the AC power is supplied normally, the UPS host 1 provides uninterrupted high-quality power to the load, and provides charging power to the battery pack module 3: when the single cell voltage detection module HV0 detects that the voltage of the single cell battery pack 3.1 is lower than the preset value, the main controller 2.1 controls the UPS charging relay 7 to close, and the main controller 2.1 controls the UPS host 1 to charge the battery pack module 3 according to the charging curve of the nickel-hydrogen battery.

[0039] During the charging process, the total voltage of the battery pack module 3 is detected in real time through the first voltage detection module HV1 and the second voltage detection module HV2, the charging current of the battery pack module 3 is detected through the shunt 9, and the ambient temperature is monitored through the ambient temperature detection module T1; the temperature and voltage of each single battery pack 3.1 are monitored by the single temperature detection module T0 and the single voltage detection module HV0. When the first voltage detection module HV1 and the second voltage detection module HV2 detect that the total voltage reaches the cut-off voltage under the corresponding ambient temperature, the main controller 2.1 controls the charging relay 7 to disconnect and normally cuts off the charging.

[0040] During the charging process, if over-temperature, over-voltage or abnormal charging current is detected, the main controller 2.1 will control the fault indication module 13 to alarm and control the charging relay 7 to disconnect, thereby stopping charging.

[0041] When there is no mains power, the battery module 3 discharges through the freewheeling diode 10 to provide backup DC power for the UPS host 1, and provides uninterrupted AC power for the load through the UPS host 1. When the first voltage detection module HV1 and the second voltage detection module HV2 detect that the discharge voltage is lower than the preset value, that is, the battery module 3 is over-discharged, the main controller 2.1 controls the UPS host 1 to stop working and protect the battery module 3. When the mains power resumes normal power supply, the UPS host 1 will resume normal load power supply, and the BMS battery management system 2 controls the UPS host 1 to charge the battery module 3.

[0042] During the operation of the system, the CAN interface of the main controller 2.1 is converted to the RS232 communication interface to upload the monitoring data to the local display 4, which can display the above monitoring information in real time. Furthermore, the display 4 can use the IP network to upload the data to the UPS remote operation and maintenance system 6 for use by remote operation and maintenance personnel.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. An intelligent nickel-hydrogen battery management system, comprising a UPS host, a BMS battery management system, and a battery pack module, wherein the positive terminal of the UPS host DC port is connected to the positive terminal of the battery pack module, the negative terminal of the UPS host DC port is connected to the negative terminal of the battery pack module, and the BMS battery management system is in communication connection with the battery pack module; characterized in that: A charging relay, a fuse, and a shunt are connected in series between the positive terminal of the UPS host DC port and the positive terminal of the battery module; A freewheeling diode is connected in parallel at both ends of the charging relay; the anode of the freewheeling diode is connected to the output end of the relay, and the cathode of the freewheeling diode is connected to the input end of the relay; The BMS battery management system includes a main controller; the main controller is connected to the display for communication, and the main controller is connected to the UPS host for communication; An adhesion detection module is arranged between the main controller and the input end of the charging relay; a first voltage detection module is arranged between the main controller and the output end of the charging relay; a second voltage detection module is arranged between the main controller and the negative pole of the battery pack module; and the main controller is connected to the shunt.

2. The intelligent nickel-hydrogen battery management system according to claim 1, characterized in that: It also includes an ambient temperature detection module, and the input end of the main controller is connected to the ambient temperature detection module.

3. An intelligent nickel-hydrogen battery management system according to any one of claims 1 or 2, characterized in that: It also includes a fault indication module, which is connected to the output end of the main controller.

4. The intelligent nickel-hydrogen battery management system according to claim 1, characterized in that: The BMS battery management system is powered by a DC / DC converter, the positive pole of the DC input port of the DC / DC converter is connected in series between the charging relay and the fuse, and the negative pole of the DC input port of the DC / DC converter is connected to the connecting end of the negative end of the battery pack module and the negative end of the UPS host DC port.

5. The intelligent nickel-hydrogen battery management system according to claim 3, characterized in that: The BMS battery management system includes a slave controller connected to the master controller; a cell temperature detection module and a cell voltage detection module are provided in the battery pack module; The slave controller is connected to the monomer temperature detection module and the monomer voltage detection module; the slave controller is connected to the fault indication module.

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