Operator control and display device for a hazard warning control centre, hazard control centre having such an operator control and display device, and use of a supply voltage for computationally determining a battery temperature

Abstract

The invention relates to an operator control and display device (PMI) for a hazard warning control centre (BMZ), which operator control and display device is supplied with a supply voltage (VS) provided by a power supply unit (PSU) of the hazard warning control centre. The operator control and display device is designed to metrologically detect the supply voltage present there, to convert same into a digital supply voltage value, and to store same in a memory (MEM) of the operator control and display device. According to the invention, the latter is designed to computationally determine a digital battery temperature value from a converted digital supply voltage value on the basis of a supply voltage / battery temperature function VS := f(TBAT) and to store said value in the memory. The invention further relates to a hazard warning control centre having such an operator control and display device which comprises an emergency power battery (BAT) and a power supply unit. The invention additionally relates to a computer program (PRG), to a computer-readable data carrier (DT) having such a computer program, and to a suitable use.

Description

[0001] Description

[0002] Operating and display device for a fire alarm control panel, fire alarm control panel with such an operating and display device, and use of a supply voltage for calculating a battery temperature

[0003] Technical field

[0004] The invention relates to an operating and display device for a fire alarm control panel, in particular for a fire alarm control panel. The operating and display device is powered by a supply voltage provided by a power supply unit of the fire alarm control panel. Furthermore, the operating and display device is configured to measure the applied supply voltage, convert it into a digital supply voltage value, and store it in a memory of the operating and display device or in a memory of the fire alarm control panel, for example, via an interface of the operating and display device.

[0005] The invention further relates to a fire alarm control panel, in particular a fire alarm control panel, wherein the fire alarm control panel comprises such an operating and display device, an emergency power battery, and a power supply unit for supplying voltage to at least the operating and display device and for charging the emergency power battery with the same, in particular the same, supply voltage. The power supply unit is configured to measure the battery temperature of the emergency power battery and to adjust the supply voltage according to a predefined battery temperature / supply voltage function. Typically, a temperature sensor is already integrated into the power supply unit. Because the power supply unit is located adjacent to the emergency power battery, the temperature measured by the power supply unit essentially corresponds to the battery temperature.

[0006] The battery temperature / supply voltage function can be viewed as a temperature-dependent supply voltage characteristic or mathematical formula that directly assigns a battery temperature value to a supply voltage value.

[0007] The invention further relates to a computer program comprising instructions which, when the computer program is executed by a microprocessor of such an operating and display device, cause the microprocessor to perform corresponding steps. The invention also relates to a computer-readable data carrier on which such a computer program is stored.

[0008] Finally, the invention relates to a suitable use of a supply voltage measured by such an operating and display device, which is provided or supplied at least for the purpose of supplying voltage to the operating and display device.

[0009] German patent DE 102009 006 570 A1 discloses a method and a circuit for monitoring an emergency power battery of a fire alarm system. To monitor the internal resistance of an emergency power battery of a fire alarm system with a charging circuit for this battery, a circuit is inserted between the emergency power connection of the fire alarm system and the battery. This circuit periodically checks the internal resistance and sends an error signal to the fire alarm system if the value is outside a permissible range. From a circuit design perspective, this can be implemented by a module inserted between the emergency power connection of the fire alarm system and the battery terminals, which periodically measures the battery's internal resistance.

[0010] US Patent 5,047,961 A discloses a device for the continuous monitoring of backup batteries during operation. The device monitors the backup batteries during all discharge cycles, records battery usage and condition, and alerts operators when the battery discharge voltage falls below the minimum required for the application. The device includes voltage, current, and temperature sensors that generate signals which are amplified and then transmitted to an analog-to-digital converter and subsequently to a central processing unit.

[0011] From DE 42 16 045 A1, a multi-battery charger is known in which certain battery parameters, such as battery voltage and battery temperature, are recorded during the charging process. One battery parameter is assigned a priority factor, which is then preferentially used to control the charging process. Once predefined limits for the priority parameter are reached, the corresponding battery slot is switched off and the charger switches to the next battery slot or the next battery to be charged. Technical background

[0012] The term "intrusion detection system" encompasses all types of alarm systems designed to independently detect hazards such as fire, burglary, or robbery, process user input regarding these hazards, and report corresponding incidents to a central control room or management station. Intrusion detection systems typically include one or more control panels, usually for wired connection of one or more detector groups. A detector group typically comprises a variety of detectors, such as fire alarms, motion detectors, intrusion sensors, and acoustic and / or visual alarm devices, or even loudspeakers for voice output, all connected via a common line.

[0013] An alarm control panel typically includes an operator panel, also known in technical terms as a PMI (Person-Machine Interface) or HMI (Human-Machine Interface). For user input, the operator panel can include, for example, pushbuttons, switches, rotary selector switches, or a touchscreen. For user output, the operator panel can include visual indicators such as LEDs, a buzzer, a speaker for voice output, or an alphanumeric or graphical display, such as a touchscreen.

[0014] A typical fire alarm control panel includes an operator panel and a backup battery to ensure continued operation of the entire system, including the control panel, for a specified minimum time in the event of a mains power failure. The backup battery is charged via the control panel's power supply unit and, after initial charging, is maintained at a reduced current. During charging, the power supply unit monitors the battery's charge level and adjusts the current accordingly. The battery is typically connected in parallel to the power supply unit's output, which provides the voltage to power the operator panel and any line cards connected to it.A line card serves to connect and operate one or more detector groups, each with a multitude of connected hazard detectors, acoustic and / or visual alarm devices, and input / output modules. The emergency power battery under consideration is, from a technological standpoint, a secondary cell and thus an accumulator. Since, in everyday language, an accumulator is usually referred to as a battery, the term "battery" will be used synonymously with "accumulator" in the following text.

[0015] The emergency power battery is typically a lead-acid battery. Alarm control panels preferably use VRLA batteries (valve-regulated lead-acid batteries), which are lead-acid batteries with a pressure relief valve. Alternatively or additionally, alarm control panels may use AGM batteries (absorbent glass mat batteries), which are absorbent glass mat batteries.

[0016] Alternatively, the emergency power battery can be a NiCd battery, a NiMH battery, a lithium-ion battery, especially a lithium iron phosphate battery, or a sodium-ion battery. The different battery types have specific charging and discharging characteristics, which also depend on the battery temperature.

[0017] In many cases, the power supply of an alarm control panel includes a temperature sensor, or such a temperature sensor is connected to the power supply to measure the current temperature of the backup battery or the temperature in its vicinity. For example, in Germany, there has long been a "VdS" guideline issued by VdS Schadenverhütung GmbH, a private testing and certification body, which mandates temperature-dependent charging of the backup battery to ensure sufficient battery capacity across its entire operating temperature range. The supply voltage / battery temperature function Vs := f(TβAT) specified by VdS is specific to the battery technology used and is as follows for a lead-acid battery: UTem P[V] = -0.036[V]*Temp[°C]+28.02[V]. This is a linear or linearized mathematical relationship. This temperature-dependent supply voltage is also the system voltage of the alarm control panel. In other words, the temperature-dependent supply voltage or system voltage applied to the power supply unit corresponds to the battery charging voltage of the emergency power battery connected directly in parallel to the supply voltage output of the power supply unit.

[0018] The higher the battery temperature, the shorter the resulting lifespan of the emergency power battery. If measurements are only taken infrequently, such as a few times a year, detecting extreme temperatures or predicting the end of an emergency power battery's lifespan is either impossible or only possible with a significant safety margin. Typically, the system voltage is known to the operating and display unit of an alarm control panel. This voltage is also monitored for impermissible deviations. The current system or supply voltage can be retrieved and displayed on the operating and display unit via user input. The system voltage at the operating and display unit is typically measured by an analog-to-digital converter and processed internally, for example, for digital monitoring.

[0019] For a large proportion of older alarm control panels already installed in the field, the current battery temperature is not (digitally) available to the associated operating and display devices. This is because the current battery temperature was not a feature of any potentially necessary monitoring. Many older control panels therefore lack an additional analog input for a temperature sensor and also a free data interface, such as an RS485 or RS232 interface, to receive a current battery temperature reading electronically. While the power supply unit may contain a temperature sensor that could be used to measure the battery temperature, only newer power supplies have a bus interface for outputting a current battery temperature value.

[0020] Summary of the invention

[0021] Based on this, it is an object of the present invention to provide an operating and display device which enables the simple detection of a current battery temperature.

[0022] In particular, it is an object of the invention to provide an operating and display device which can be easily retrofitted to record a current battery temperature.

[0023] A further object of the invention is to provide a hazard detection control center with such an operating and display device.

[0024] Furthermore, it is an object of the invention to specify a suitable computer program and a computer-readable data carrier on which such a computer program is stored. Finally, it is an object to specify a suitable use of a supply voltage measured by such an operating and display device.

[0025] The task is accomplished by an operating and display unit configured to calculate a digital battery temperature value from a digital supply voltage / battery temperature function Vs := f(TßAT), based on a supply voltage / battery temperature function stored on the unit or loaded via an interface. This calculated value is then stored in the memory of the operating and display unit or the alarm control panel. The digital battery temperature value stored in the operating and display unit's memory can then be read, for example, by user input on the unit and displayed on a screen. Alternatively or additionally, the calculated digital battery temperature value can be transmitted to other devices (cloud storage, measuring instruments, etc.) via suitable interfaces.

[0026] The supply voltage / battery temperature function Vs := ^TBAT) can be, for example, a data table that assigns a battery temperature value to a supply voltage value, such as in a grid with voltage values ​​of 0.1 volts or 0.05 volts.

[0027] The object of the invention is further solved by a hazard detection center in which the supply voltage / battery temperature function Vs := ^TBAT), on which the determination of the digital battery temperature value from the digital supply voltage value detected by the operating and display device according to the invention is based, is an inverse function to the specified battery temperature / supply voltage function TBAT := f(Vs).

[0028] The core of the invention lies in the fact that, from an already known temperature-dependent supply voltage / battery temperature function Vs := ^TBAT), it is possible to infer the original detected battery temperature.

[0029] This eliminates the need to equip the operating and display unit with an additional I / O module containing an analog-to-digital converter or an additional data interface for temperature monitoring of the emergency power battery. Furthermore, it also eliminates the additional wiring effort required within the alarm control panel to connect to a temperature sensor, such as a Pt100, which would otherwise be required on the emergency power battery.

[0030] Furthermore, the object of the invention is solved by a computer program which includes instructions which, when the computer program is executed by a microprocessor of an operating and display device according to the invention, cause the microprocessor to perform the following steps:

[0031] - based on a data section of the computer program which the

[0032] The supply voltage / battery temperature function (Vs := ^TBAT) represents the calculation of the digital battery temperature value from the supply voltage value detected by the operating and display unit and converted to analog / digital format, and

[0033] - to store the determined digital battery temperature value in the memory of the operating and display unit and, if necessary, to output it to a display of the operating and display unit and / or to a higher control center or cloud infrastructure connected to the operating and display unit via data technology.

[0034] The microprocessor can also be an integral part of a microcontroller of the operating and display device, with such a microcontroller typically including further integrated circuit blocks such as digital inputs and outputs, analog / digital converters, digital / analog converters and bus interfaces.

[0035] This makes it advantageously possible to functionally retrofit the operating and display unit to include battery temperature monitoring by means of a software update of the microprocessor-based operating and display unit.

[0036] Furthermore, the object of the invention is achieved by a computer-readable data carrier on which such a computer program is stored. The data carrier can, for example, be a USB stick, which has non-volatile flash memory and a data interface for reading. Alternatively, the data carrier can be an optical or magnetic storage medium, such as a CD, a DVD, or a floppy disk.

[0037] The computer program can then be advantageously installed for a software update via a data interface of the operating and display device, such as by means of a USB data stick via a corresponding USB interface of the operating and display device.

[0038] Alternatively or additionally, the computer program can be loaded into the memory of the operating and display device from the control center or the cloud infrastructure via a (further) wired data interface of the operating and display device, such as a LAN cable or USB cable, particularly based on an IP data protocol. Alternatively or additionally, the computer program can also be loaded into the memory of the operating and display device from the control center or the cloud infrastructure via a wireless data interface of the operating and display device, such as a WLAN, Bluetooth, or GSM wireless data interface, particularly based on an IP data protocol.

[0039] The computer program according to the invention can then be advantageously transferred from a remote location to the operating and display device for a software update.

[0040] Finally, the object of the invention is achieved by using, according to the invention, a supply voltage measured by an operating and display device of a fire alarm control panel and intended at least for supplying power to the operating and display device, in order to calculate a (current) battery temperature based on a supply voltage / battery temperature function Vs := ^TBAT) and to store the calculated battery temperature in a memory of the operating and display device. Optionally, the calculated battery temperature can be displayed on a screen of the operating and display device and / or on a higher-level control center or cloud infrastructure connected to the operating and display device.

[0041] Embodiments of the invention

[0042] According to one embodiment of the operating and display device, it is configured to continuously generate an average digital battery temperature value OTBAT from digital supply voltage values ​​or from calculated digital battery temperature values ​​and to store this value in the memory of the operating and display device.

[0043] "Continuous" refers to a repeated, especially cyclical, computational determination of the mean digital battery temperature values ​​OTBAT at a measurement interval in the range of 1 second to 1 day, especially in the range of 1 minute to 6 hours.

[0044] This can advantageously prevent an unnecessarily premature battery replacement due to unfavorable measurement conditions, such as in summer or when high heat generation is caused by a high electrical load from other devices at the location of the control unit. "Repeated" refers specifically to the cyclical determination of a current digital battery temperature value in a calculated measurement cycle ranging from 1 minute to 1 day, particularly from 1 hour to 6 hours.

[0045] This advantageously provides a time-based measurement series with a large number of determined digital battery temperature values ​​for possible further processing.

[0046] According to a further embodiment, the operating and display device is configured to output the mean digital battery temperature value OTBAT and / or the currently determined digital battery temperature values, optionally together with a respective timestamp, on a display of the operating and display device and / or to output them to a higher-level control center or cloud infrastructure connected to the operating and display device. To read the current time, the operating and display device can have a real-time clock or obtain it from the control center or cloud infrastructure.

[0047] By transmitting the average digital battery temperature value (OTBAT) and / or the currently measured digital battery temperature values, along with their respective timestamps, to the cloud, battery service work can be planned well in advance. This also minimizes the number of required on-site customer visits by a technician.

[0048] According to another embodiment, the operating and display unit is configured to determine the end of service life and / or the remaining operating time of an emergency power battery intended to supply power to the operating and display unit, based on the average digital battery temperature value (ÖTBAT) and / or based on the currently determined digital battery temperature values. For this purpose, the commissioning date of the emergency power battery can be taken into account when determining the end of service life and / or the remaining operating time. Finally, the operating and display unit is configured to output the determined end of service life and / or the determined remaining operating time to the display of the operating and display unit and / or to the higher-level control center or cloud infrastructure connected to the operating and display unit.

[0049] Since the battery temperature is recorded and averaged by the operating and display device according to the invention not just once a year, but, for example, several times a day or week and over several days and seasons, a very precise calculation of the end of its service life or the remaining operating time of the emergency battery is advantageously possible. This allows for a longer and therefore more environmentally friendly operation of an emergency power battery.

[0050] The expected lifespan decreases sharply with increasing battery temperature. Typical calculations for the expected lifespan of a lead-acid battery depending on the battery temperature are 5 to 6 years at 20°C, 2 to 3 years at 30°C, and less than one year at 50°C. The necessary calculations can be simulated, for example, using a suitable algorithm or a suitable thermal aging model.

[0051] The determined end of service life and / or the determined remaining operating time of the emergency power battery can preferably be displayed on the screen of the operating and display unit upon user input.

[0052] According to another embodiment, a battery temperature / supply voltage function TBAT := f(Vs) is an inverse function of a battery-type-specific, in particular linear or linearized, supply voltage / battery temperature function Vs := TBAT. An "inverse function" is a mathematical bijective function where the inverse function of an inverse function simultaneously yields the original function.

[0053] The battery type-specific supply voltage / battery temperature functions or characteristics are typically defined in a simplified form as linear functions by a manufacturer, but also by standardization and certification bodies.

[0054] According to another embodiment, the battery temperature / supply voltage function TBAT := f(Vs), typically for a lead-acid battery, is defined as follows:

[0055] Battery temperature TBAT [°C] := (28.02 [V] - supply voltage Vs [V]) / 0.036 [V / °C].

[0056] According to an advantageous embodiment of the alarm control panel, the power supply is configured to adjust the supply voltage with an accuracy of ±200 mV, in particular with an accuracy of ±100 mV, preferably with an accuracy of ±90 mV, according to the following battery temperature-supply voltage function Vs := ^TBAT), here again for a lead-acid battery:

[0057] Supply voltage Vs [V] := -0.036 [V / °C] * Battery temperature TBAT [°C] + 28.02 [V], The corresponding inverse function for calculating a digital battery temperature value from a digital supply voltage value measured by the operating and display unit is defined as follows:

[0058] Battery temperature TBAT [°C] := (28.02 [V] - supply voltage Vs [V]) / 0.036 [V / °C].

[0059] If the power supply has an accuracy of ±100 mV for providing the supply voltage, this results in a calculated battery temperature TBAT with a tolerance of ±2.78°C.

[0060] If, on the other hand, the power supply has an accuracy of ±90 mV for providing the supply voltage, this results in a calculated battery temperature TBAT with a tolerance of only ±2.5°C.

[0061] According to another embodiment of the alarm control panel, the emergency power battery is a lead-acid battery or lead-acid accumulator, in particular a valve-regulated lead-acid battery (VRLA lead-acid battery) and / or an absorbent glass mat battery (AGM battery). VRLA / AGM lead-acid batteries are typically used as emergency power batteries in alarm control panels.

[0062] According to another embodiment, the hazard detection control center is a fire alarm control center of a fire alarm system, as specified, for example, in EN 54-2.

[0063] Alternatively, the alarm control panel can be a voice alarm control panel of a voice alarm system, as specified, for example, in EN 54-16 as a product standard for voice alarm control panels, in DIN VDE 0833-4 or in DIN 14675.

[0064] Alternatively, the hazard detection control center can be a fire alarm control center of a fire alarm system, as specified, for example, in VDE V 0826-2 or in the draft of EN 50726-1.

[0065] Alternatively, the alarm control panel can be an intrusion detection control panel of an intrusion detection system, as specified, for example, in DIN EN 50131-1; VDE 0830-2-1:2010-02 or in VdS 2311. According to one embodiment of the computer program, it includes commands which, when the computer program is executed by the microprocessor of the operating and display device, cause the microprocessor to perform the following steps, i.e.to determine the end of service life and / or the remaining operating time of an emergency power battery intended for powering the operating and display unit based on the mean digital battery temperature value OTBAT and / or based on the currently determined digital battery temperature values, if necessary taking into account a commissioning date of the emergency power battery, and to output this information on the display of the operating and display unit and / or to the higher control center or cloud infrastructure connected to the operating and display unit.

[0066] According to one method variant, the battery temperature / supply voltage function TBAT := f(Vs) is the inverse function of a supply voltage / battery temperature function Vs := ^TBAT) that is technologically predetermined by the battery type used.

[0067] Alternatively, the battery temperature / supply voltage function TBAT := f(Vs), here using the example of a lead-acid battery, is defined as follows:

[0068] Battery temperature TBAT [°C] := (28.02 [V] - supply voltage Vs [V]) / 0.036 [V / °C].

[0069] Exemplary embodiments of the drawing

[0070] The invention and advantageous embodiments of the present invention are explained with reference to the following figures. These show:

[0071] FIG 1 shows an exemplary setup of a hazard detection control center using the example of a fire alarm control center with a first operating and display device according to the invention,

[0072] FIG 2 is an exemplary diagram showing the aging of a lead-acid battery as a function of battery temperature, and

[0073] FIG. 3 shows the example according to FIG. 1 with a second operating and display device according to the invention. Detailed description of the embodiments.

[0074] Further advantages, features and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described in detail with reference to the single figure.

[0075] FIG 1 shows an exemplary configuration of a fire alarm control panel (FACP) using the example of a fire alarm control panel with a first operating and display unit (OMU) according to the invention. The fire alarm control panel (FACP) shown comprises, in addition to the (first) operating and display unit (OMU), a module containing several alarm line cards (LQ), a power supply unit (PSU), and an emergency power battery (EBU). The aforementioned components of the fire alarm control panel (FACP) shown are, by way of example, housed as modules in different cabinet levels (E1-E3) within a cabinet housing (SG) of the fire alarm control panel (FACP).

[0076] The operating and display unit PMI shown in the upper part of FIG. 1 comprises an alphanumeric display ANZ, which, for example, shows an applied system voltage Vs and a battery temperature TBAT already determined according to the present invention. For user input, the operating and display unit PMI has a rotary selector switch DK and various pushbuttons BUT. Alternatively or additionally, the operating and display unit PMI can have a touch-sensitive display, i.e., a touchscreen. For user output, the operating and display unit includes, in addition to the alphanumeric display ANZ, a series of light-emitting diodes LED. Furthermore, the operating and display unit PMI can include a USB data interface for the possible connection of a data storage device DT in order to read data from a memory MEM of the operating and display unit PMI or to display data such as, for example,A computer program (PRG) containing commands for controlling the operator interface (PMI) is loaded into the PMI's memory (MEM). The MEM is preferably non-volatile memory, such as flash memory. Alternatively, it can be RAM, particularly buffered static RAM. Typically, the fire alarm control panel (BMZ) shown is connected to a higher-level control center (LS) and / or a cloud infrastructure (CLOUD) via a data interface (IPS), such as an internet connection.

[0077] A CPU is a processor-based control unit, in particular a microprocessor or a microcontroller with a microprocessor, on which a computer program PRG containing instructions for controlling the operator interface (PMI) is loaded and stored. The operator interface (PMI) also includes an analog-to-digital converter (ADC) for measuring the system voltage (Vs) supplied by the power supply (N) at the operator interface (PMI).

[0078] The central part of FIG. 1 shows an insert with 15 exemplary line cards LK. Such a line card LK serves to connect and operate one or more detector groups, each with a multitude of hazard detection components BK, such as hazard detectors and acoustic and / or optical alarm devices, connected via a detector line ML.

[0079] The lower part of FIG 1 shows the power supply unit PSU, which is connected on the input side to a public power supply network N and which provides the supply voltage Vs, also known as the system voltage, on the output side.

[0080] Typically, the emergency power battery (BAT) is connected directly in parallel to the outputs of the power supply unit (PSU). Is denotes the system current, IP the supply and charging current, and IB the battery current. The latter powers the entire fire alarm control panel (BMZ) and the hazard detection components (BK) connected via the line cards (LK) in the event of a mains power failure. To set a required battery-type-specific, temperature-dependent supply voltage (Vs), the power supply unit (PSU) is connected to a temperature sensor (TS1-TS3) to measure the current temperature (TBAT) of the emergency power battery (BAT). In this example, the temperature sensor TS1 is mounted directly on the outside of the emergency power battery (BAT). The alternative temperature sensor TS2, on the other hand, is located in the immediate vicinity of the emergency power battery (BAT), for example, at a maximum distance of 10 cm.The additional temperature sensor TS3, used for alternatively measuring the temperature TBAT of the emergency power battery BAT, is located inside the power supply unit (PSU), specifically on a circuit board within the PSU. This sensor may also be integrated into a microcontroller within the PSU. Since the PSU and the emergency power battery BAT are located close to each other, it can be assumed that the three previously shown temperature sensors TS1-TS3 measure approximately the same temperature TBAT of the emergency power battery BAT.

[0081] According to the invention, the operating and display unit PMI is configured to calculate a digital battery temperature value from a digital supply voltage value based on a supply voltage / battery temperature function Vs := f(TßAT) stored therein or loadable therein, and to store this value in the memory MEM of the operating and display unit PMI and, if necessary, as already shown in FIG. 1, to display it on the display ANZ of the operating and display unit PMI. The operating and display unit PMI typically already includes an analog-to-digital converter (ADC) for measuring the supply voltage Vs applied to the operating and display unit PMI.

[0082] In particular, a computer program PRG according to the invention comprises instructions which, when the computer program PRG is executed by the microprocessor CPU of the operator and display device PMI, cause the microprocessor CPU to perform the following steps:

[0083] - based on a data section of the computer program PRG, which represents the supply voltage / battery temperature function Vs := ^TBAT), to computationally determine a digital battery temperature value from a supply voltage value acquired by the operating and display unit PMI and converted to analog / digital, and

[0084] - to store the determined digital battery temperature value in a memory MEM of the operating and display unit PMI, possibly with a timestamp.

[0085] The computer program PRG according to the invention can be installed as a software update on the operating and display device PMI via the USB data interface, for example by inserting a USB data stick into the USB data interface designed as a USB socket.

[0086] Alternatively or additionally, the computer program PRG according to the invention can be loaded into the memory MEM of the operating and display device PMI from the control center LS or from the cloud infrastructure CLOUD via an IP data connection, in particular via a LAN, WLAN or GSM data connection. After a reset, the operating and display device PMI then has access to the functional extension of the additional determination of the battery temperature TBAT according to the invention.

[0087] Figure 2 shows an example diagram illustrating the aging of a lead-acid battery as a function of battery temperature. A rough estimate of the expected battery lifespan in years (a) is plotted against a recorded battery temperature in °C. TB denotes a temperature band that reflects this rough, empirical estimate. It is evident that the lifespan of a lead-acid battery decreases drastically with increasing battery temperature. In the extreme case, the maximum lifespan at a battery temperature of 50 °C is only 7 to 10 months.

[0088] FIG 3 shows the example according to FIG 1 with a (second) operating and display device PMI according to the invention. In comparison to the example in FIG 1, the operating and display device PMI shown in the upper part of FIG 3 comprises a three-line alphanumeric display ANZ, on which an end of service life (EOL) determined according to the invention is now additionally displayed, here reduced by way of example to the expected month and year (12 / 2026).

[0089] The determined end of service life (EOL) can also be output via the additional data interface IPS of the fire alarm control panel (BMZ) shown, e.g. via an internet data connection, to a higher-level control center (LS) and / or to a cloud infrastructure (CLOUD).

[0090] Reference symbol list

[0091] ADC Analog-to-Digital Converter

[0092] ANZ display unit, display, touchscreen

[0093] BAT emergency power battery, emergency power accumulator, lead-acid battery

[0094] BK components of a fire alarm system, fire detectors, alarm devices

[0095] BMZ alarm control center, fire alarm control center

[0096] BUT button, switch

[0097] CLOUD Cloud Infrastructure

[0098] CPU control unit, microprocessor, microcomputer

[0099] DK rotary selector

[0100] DT data carrier, data stick

[0101] EOL (End of Life) Battery

[0102] E1 - E3 Cabinet level

[0103] GND ground, reference potential

[0104] IB Battery current lp Supply and charging current

[0105] Is system current

[0106] IPS IP interface

[0107] LED optical display, light-emitting diode

[0108] LK route maps, reporting route maps

[0109] LS Control Center, Management Station

[0110] MEM memory, Flash, RAM

[0111] ML detector line

[0112] N Network supply, power supply network

[0113] PMI Human-Machine Interface, Person-Machine Interface

[0114] PRG computer program

[0115] PSU power supply unit

[0116] SE control unit, microcontroller

[0117] SG cabinet enclosure

[0118] TB temperature band

[0119] TBAT Battery Temperature

[0120] TS1, TS2, TS3 temperature sensor

[0121] USB data interface

Claims

Patent claims 1. Operator control unit (PMI) for a fire alarm control panel (FACP), wherein the operator control unit (PMI) is powered by a supply voltage (Vs) provided by a power supply unit (PSU) of the fire alarm control panel (FACP), and wherein the operator control unit (PMI) is configured to measure the supply voltage (Vs) applied therein, convert it into a digital supply voltage value and store it in a memory (MEM) of the operator control unit (PMI) or the fire alarm control panel, characterized in that the operator control unit (PMI) is also configured to, based on a value stored therein or on a value obtained via an interface (IPS,USB) of the operating and display unit (PMI) to load supply voltage / battery temperature function Vs := ^TBAT) to calculate a digital battery temperature value from a converted digital supply voltage value and store it in the memory (MEM) of the operating and display unit (PMI) or the fire alarm control panel (FACP).

2. Operating and display device (PMI) according to claim 1, configured to continuously generate an average digital battery temperature value OTBAT ZU from digital supply voltage values ​​or from computationally determined digital battery temperature values ​​and to store this value in the memory (MEM) of the operating and display device (PMI).

3. Operating and display device (PMI) according to claim 1 or 2, configured to repeatedly, in particular cyclically, store a currently determined digital battery temperature value, preferably together with a timestamp, in the memory (MEM) of the operating and display device (PMI).

4. Operating and display device (PMI) according to claim 2 or 3, configured to output the mean digital battery temperature value OTBAT and / or the currently determined digital battery temperature values, optionally together with a respective timestamp, on a display (ANZ) of the operating and display device (PMI) and / or to output to a higher control center (LS) or cloud infrastructure (CLOUD) connected to the operating and display device (PMI) via data technology.

5. Operator and display unit (PMI) according to claim 1 or 2, configured to determine, based on the mean digital battery temperature value OTBAT and / or based on currently determined digital battery temperature values, an end of life (EOL) and / or a remaining operating time of a battery supplying power to the operator and display unit (PMI) to determine the intended emergency power battery (BAT), if necessary taking into account a commissioning date of the emergency power battery (BAT), and to output it to the display (ANZ) of the operator and display unit (PMI) and / or to the higher control center (LS) or cloud infrastructure (CLOUD) connected to the operator and display unit (PMI) via data technology.

6. Operating and display device (PMI) according to one of the preceding claims, wherein a battery temperature / supply voltage function TBAT := f(Vs) is an inverse function of a battery type-specific, in particular linear, supply voltage / battery temperature function Vs := ^TBAT).

7. Operating and display device (PMI) according to claim 6, wherein the battery temperature / supply voltage function TBAT := f(Vs) is defined as follows: Battery temperature TBAT [°C] := (28.02 [V] - supply voltage Vs [V]) / 0.036 [V / °C].

8. Alarm control panel (ODC) with an operating and display unit (OPU) according to one of claims 1 to 7, with an emergency power battery (EPS) and with the power supply unit (PSU) for supplying voltage to at least the operating and display unit (EPS) and for charging the emergency power battery (EPS) with the same, in particular the same, supply voltage (Vs), - wherein the power supply unit (PSU) is configured to measure the battery temperature (TBAT) of the emergency power battery (BAT) and to adjust the supply voltage (Vs) according to a predefined battery temperature / supply voltage function TBAT := f(Vs), and - where the supply voltage / battery temperature function Vs := ^TBAT) , on which the determination of the digital battery temperature value from the digital supply voltage value acquired by the operator and display unit (PMI) is based, is an inverse function to the specified battery temperature / supply voltage function TBAT := f(Vs).

9. Fire alarm control panel (FACP) according to claim 8, - wherein the power supply unit (PSU) is configured to adjust the supply voltage (Vs) with an accuracy of ±200 mV, in particular ±100 mV, preferably ±90 mV, according to the following battery temperature-supply voltage function Vs := ^TBAT): Supply voltage Vs [V] := -0.036 [V / °C] * Battery temperature TBAT [°C] + 28.02 [V], and - where a corresponding inverse function for calculating the digital battery temperature value from the digital supply voltage value measured by the operator interface (PMI) is defined as follows: Battery temperature TBAT [°C] := (28.02 [V] - supply voltage Vs [V]) / 0.036 [V / °C].

10. Fire alarm control panel (FACP) according to claim 8 or 9, wherein the emergency power battery (EPS) is a lead-acid battery, in particular a valve-regulated lead-acid battery and / or an absorbent glass mat battery.

11. Alarm control panel (ODC) according to any of the preceding claims 8 to 10, wherein the alarm control panel (ODC) is one of the following: a fire alarm control panel of a fire alarm system, a voice alarm control panel of a voice alarm system, a fire warning control panel of a fire warning system, an intrusion alarm control panel of an intrusion alarm system.

12. Computer program (PRG), comprising instructions which, when the computer program (PRG) is executed by a microprocessor (CPU) of an operator and display device (PMI) according to any one of the preceding claims 1 to 7, cause the microprocessor (CPU) to perform the following steps: - based on a data section of the computer program (PRG) representing the supply voltage / battery temperature function Vs := ^TBAT), to computationally determine the digital battery temperature value from the supply voltage value acquired by the operator and display unit (PMI) and converted to analog / digital form, and - to store the determined digital battery temperature value in the memory (MEM) of the operator and display unit (PMI) and, if necessary, to output it to a display (ANZ) of the operator and display unit (PMI) and / or to a higher control center (LS) or cloud infrastructure (CLOUD) connected to the operator and display unit (PMI) via data technology.

13. Computer program (PRG) according to claim 12, comprising instructions which, when the computer program (PRG) is executed by the microprocessor (CPU) of the operator and display device (PMI), cause the microprocessor (CPU) to perform the following steps: - to determine the end of life (EOL) and / or the remaining operating time of an emergency battery (BAT) intended to power the operator interface (PMI) based on the mean digital battery temperature value OTBAT and / or based on the currently determined digital battery temperature values, if necessary taking into account a commissioning date of the emergency battery (BAT), and to output this information to the display (ANZ) of the operator interface (PMI) and / or to the to output to the operator interface (PMI) to a higher-level control center (LS) or cloud infrastructure (CLOUD) that is connected to the data technology.

14. Computer-readable data carrier (DT) on which the computer program (PRG) according to claim 12 or 13 is stored.

15. Use of a supply voltage (Vs) measured by an operator control and display unit (PMI) of a fire alarm control panel (FACP), intended at least for supplying power to the operator control and display unit (PMI), for calculating a battery temperature (TBAT) based on a supply voltage / battery temperature function Vs := ^TBAT) and for storing the calculated battery temperature (TBAT) in a memory (MEM) of the operator control and display unit (PMI) and, if necessary, for output to a display (ANZ) of the operator control and display unit (PMI) and / or for output to a higher-level control center (LS) or cloud infrastructure (CLOUD) connected to the operator control and display unit (PMI) via data technology.

16. Use according to claim 15, wherein the battery temperature / supply voltage function TBAT := f(Vs) is the inverse function of a supply voltage / battery temperature function Vs := ^TBAT) technologically predetermined by the battery type used.

17. Use according to claim 15, wherein the battery temperature / supply voltage function TBAT := f(Vs) f(Vs) is defined as follows: Battery temperature TBAT [°C] := (28.02 [V] - supply voltage Vs [V]) / 0.036 [V / °C].

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