Battery control method of emergency lighting circuit, emergency lighting circuit and lighting equipment

Abstract

The invention discloses a battery control method of an emergency lighting circuit, the emergency lighting circuit and lighting equipment, the emergency lighting circuit comprises a plurality of battery packs and a light source driving circuit, and the method comprises the following steps: when the lighting equipment is powered on, judging whether the mains supply accessed to the lighting equipment is normal or not; when the mains supply is abnormal, controlling one of the plurality of battery packs to discharge to the light source driving circuit, recording the battery pack as a first battery pack, recording the other battery packs as second battery packs, and performing discharge detection and discharge condition judgment on the first battery pack; if the discharging condition of the first battery pack is normal, controlling the first battery pack to discharge the light source driving circuit; and if the discharge condition of the first battery pack is abnormal, recording the first battery pack as a fault battery pack, controlling one battery pack in the second battery pack as a new first battery pack, and returning to execute discharge detection and discharge condition judgment on the first battery pack until the discharge condition of any battery pack in the plurality of battery packs is normal. The invention aims to improve the power supply reliability during emergency lighting.

Description

Technical Field

[0001] The present invention relates to the field of emergency lighting, and in particular to a battery control method for an emergency lighting circuit, an emergency lighting circuit and lighting equipment. Background Art

[0002] Lighting that is activated when the power supply for normal lighting fails is called emergency lighting. Emergency lighting is different from ordinary lighting. It includes three types: backup lighting, evacuation lighting, and safety lighting. When a fire or other disaster occurs in a building and the power supply is interrupted, emergency lighting plays an important role in personnel evacuation, firefighting and rescue work, and the continued operation of important production and work or necessary operations. It is necessary to ensure that the backup power supply is available when emergency lighting is needed to prevent the situation where the battery is out of power when emergency lighting is needed.

[0003] However, during emergency lighting, current lighting equipment may fail to fully charge or discharge the battery due to the battery just undergoing a discharge test or due to environmental influences, thereby reducing the reliability of the power supply to the light source during emergency lighting. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a battery control method for an emergency lighting circuit, an emergency lighting circuit and a lighting device to solve the problem of low power supply reliability during emergency lighting.

[0005] The technical solution of the present invention is as follows: A battery control method for an emergency lighting circuit is applied to a lighting device. The emergency lighting circuit includes a plurality of battery packs and a light source driving circuit. The battery control method for the emergency lighting circuit includes the following steps: When the lighting equipment is powered on, determine whether the mains power connected to the lighting equipment is normal; When the mains power is abnormal, one of the multiple battery groups is controlled to discharge the light source driving circuit, the battery group is recorded as the first battery group, and the remaining battery groups are recorded as the second battery group, and the first battery group is tested for discharge and the discharge condition is judged; If the discharge condition of the first battery pack is normal, controlling the first battery pack to discharge the light source driving circuit; If the discharge condition of the first battery pack is abnormal, it is recorded as a faulty battery pack, and one of the second battery packs is controlled to be a new first battery pack, and the process returns to the steps of performing discharge detection and discharge condition judgment on the first battery pack until the discharge condition of any one of the multiple battery packs is normal.

[0006] Optionally, when the lighting device is powered on, after the step of determining whether the mains power connected to the lighting device is normal, the following steps are also included: When the mains power is normal, the mains power is controlled to supply power to the lighting equipment, and the mains power is controlled to charge the multiple battery packs in sequence.

[0007] Optionally, the emergency lighting circuit includes a charging circuit, and the step of controlling the multiple battery packs to charge cyclically in sequence specifically includes: The control charging circuit sequentially cyclically charges the multiple battery packs, each battery pack is charged for a preset cycle, and when the mains power is abnormal, the timing of the preset cycle is suspended until the mains power returns to normal.

[0008] Optionally, the step of determining whether the mains power connected to the lighting device is normal specifically includes: Obtaining the voltage value of the mains power and comparing it with a preset voltage value range; If the voltage value of the mains is within the preset voltage value range, it is determined that the mains power connected to the lighting device is normal; If the voltage value of the mains power is not within the preset voltage value range, it is determined that the mains power connected to the lighting device is abnormal.

[0009] Optionally, the step of performing discharge detection and discharge condition judgment on the first battery pack specifically includes: Detecting the discharge current of the first battery pack and comparing it with a preset safe current value range; If the discharge current of the battery pack is within the preset safe current value range, it is determined that the discharge condition of the first battery pack is normal; If the discharge current of the battery pack is not within the preset safe current value range, it is determined that the discharge condition of the first battery pack is abnormal.

[0010] Optionally, when executing the step of detecting the discharge current of the first battery pack, the following steps are also included: Performing discharge timing on the first battery group; When the discharge time of the first battery pack reaches a preset time or the discharge current of the first battery pack is less than a preset current value, controlling the emergency lighting circuit to exit the emergency lighting mode; When the discharge time of the first battery group does not reach the preset time, it is determined that the discharge condition of the first battery group is abnormal.

[0011] The present invention further proposes an emergency lighting circuit based on the battery control method of the emergency lighting circuit, the emergency lighting circuit comprising: Battery pack charge and discharge management circuit; light source; A light source driving circuit, wherein the input end of the light source driving circuit is connected to the output end of the battery pack charge and discharge management circuit, and the driving end of the light source driving circuit is connected to the controlled end of the light source; A control circuit, wherein the output end of the control circuit is connected to the input end of the battery pack charge and discharge management circuit, and the control circuit is used to control the battery pack charge and discharge management circuit to supply power to the light source driving circuit to drive the light source to work when an abnormality in the mains power is detected.

[0012] Optionally, the battery pack charge and discharge management circuit includes: Multiple battery packs; A charging management circuit, wherein the input end of the charging management circuit is used to connect to the mains circuit, the controlled end of the charging management circuit is connected to the output end of the control circuit, the output end of the charging management circuit is connected to the input end of the plurality of battery packs, and the charging management circuit is used to output the output voltage of the mains circuit to the plurality of battery packs for charging when receiving the charging signal output by the control circuit; A discharge management circuit, wherein the input end of the discharge management circuit is connected to the output ends of the multiple battery packs, the controlled end of the discharge management circuit is connected to the output end of the control circuit, the output end of the discharge management circuit is connected to the input end of the light source driving circuit, and the discharge management circuit is used to discharge one battery pack among the multiple battery packs to the light source driving circuit when receiving a discharge signal output by the control circuit.

[0013] Optionally, the emergency lighting circuit further includes: A charging circuit, wherein the input end of the charging circuit is used to connect to the mains circuit, the output end of the charging circuit is connected to the input end of the battery pack charge and discharge management circuit, and the charging circuit is used to convert the output voltage of the mains circuit and output it to the battery pack charge and discharge management circuit; A mains power detection circuit, wherein the detection end of the mains power detection circuit is used to connect to the mains power loop, the output end of the mains power detection circuit is connected to the input end of the control circuit, the mains power detection circuit is used to detect the voltage of the mains power loop, and output a mains power detection signal to the control circuit; A power supply circuit, wherein the input end of the power supply circuit is connected to the output ends of the plurality of battery packs, the output end of the power supply circuit is connected to the power supply end of the control circuit, and the power supply circuit is used to convert the output voltage of the battery pack and output it to the control circuit.

[0014] The present invention also provides a lighting device, comprising the emergency lighting circuit as described above.

[0015] The battery control method of the emergency lighting circuit proposed in the technical solution of the present invention determines whether the mains power connected to the lighting device is normal when the lighting device is powered on; when the mains power is abnormal, one of the multiple battery groups can be controlled to discharge the light source driving circuit, and the battery group is recorded as the first battery group, and the remaining battery groups are recorded as the second battery group, and the first battery group is discharged and the discharge condition is judged; if the discharge condition of the first battery group is normal, the first battery group can be controlled to discharge the light source driving circuit; if the discharge condition of the first battery group is abnormal, it is recorded as a faulty battery group, and one of the battery groups in the second battery group is controlled to be a new first battery group, and the steps of performing discharge detection and discharge condition judgment on the first battery group are returned until the discharge condition of any battery group in the multiple battery groups is normal. In this way, the battery control method of the emergency lighting circuit of this scheme can supply power to the light source driving circuit through the battery group when the mains power is abnormal, and when a battery group in the multiple battery groups is abnormal, a battery group with normal discharge condition is selected to supply power to the light source driving circuit, thereby improving the reliability of power supply to the light source driving circuit during emergency lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 The present invention is a flowchart of the steps of a method for controlling a battery in an emergency lighting circuit according to an embodiment of the present invention.

[0018] Figure 2 It is a flowchart of the method steps of another embodiment of the battery control method of the emergency lighting circuit of the present invention.

[0019] Figure 3 The present invention is a flowchart of the steps of another embodiment of the battery control method for the emergency lighting circuit.

[0020] Figure 4 It is a functional module schematic diagram of an embodiment of the emergency lighting circuit of the present invention.

[0021] Figure 5 It is a circuit structure diagram of an embodiment of a control circuit and a battery pack charge and discharge management circuit in an emergency lighting circuit of the present invention.

[0022] Figure 6 It is a circuit structure diagram of an embodiment of a light source driving circuit in an emergency lighting circuit of the present invention.

[0023] Figure 7The present invention is a schematic diagram of the circuit structure of an embodiment of a power supply circuit in an emergency lighting circuit.

[0024] Figure 8 The present invention is a schematic diagram of the circuit structure of an embodiment of a mains power detection circuit in an emergency lighting circuit.

[0025] Fig. 9 The figure is a circuit structure diagram of an embodiment of a charging circuit in an emergency lighting circuit of the present invention.

[0026] Explanation of the reference numerals: 10, control circuit; 20, battery pack charge and discharge management circuit; 30, light source driving circuit; 40, charging circuit; 50, AC power detection circuit; 60, power supply circuit. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] In the embodiments and the scope of the patent application, unless the text specifically defines the article, "a", "an", "the" and "the" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0029] It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can also be intermediate elements. In addition, the "connection" or "coupling" used herein can include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0030] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0031] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Lighting that is activated when the power supply for normal lighting fails is called emergency lighting. Emergency lighting is different from ordinary lighting. It includes three types: backup lighting, evacuation lighting, and safety lighting. When a fire or other disaster occurs in a building and the power supply is interrupted, emergency lighting plays an important role in personnel evacuation, firefighting and rescue work, and the continued operation of important production and work or necessary operations. It is necessary to ensure that the backup power supply is available when emergency lighting is needed to prevent the situation where the battery is out of power when emergency lighting is needed.

[0033] However, during emergency lighting, current lighting equipment may fail to fully charge or discharge the battery due to the battery just undergoing discharge detection or environmental influences, which reduces the reliability of the light source power supply during emergency lighting. For example, emergency lighting equipment has self-inspection and annual inspection requirements for batteries, that is, the battery must self-discharge every quarter and every year, which is both a self-test of battery performance and a self-inspection of the emergency lighting system; but it does not rule out the possibility of abnormal mains power just after the quarterly and annual inspections of the battery are completed. If the mains power is abnormal at this time, the backup battery will have no power available, and emergency lighting cannot be achieved; and the battery is a consumable part, and excessively high or low temperatures may cause the battery to fail to fully charge or discharge, which means that the emergency lighting time cannot meet the requirements.

[0034] In order to solve the above problems, the present invention proposes a battery control method for an emergency lighting circuit, which is applied to lighting equipment. The emergency lighting circuit includes multiple battery packs and a light source driving circuit.

[0035] Reference Figure 1 In one embodiment, the battery control method of the emergency lighting circuit comprises the following steps: S100, when the lighting device is powered on, determining whether the mains power connected to the lighting device is normal; S200, when the mains power is abnormal, controlling one of the multiple battery packs to discharge the light source driving circuit, recording the battery pack as a first battery pack, and recording the remaining battery packs as second battery packs, and performing discharge detection and discharge condition judgment on the first battery pack; S300, if the discharge condition of the first battery pack is normal, control the first battery pack to discharge the light source driving circuit; S400, if the discharge condition of the first battery pack is abnormal, it is recorded as a faulty battery pack, and one of the second battery packs is controlled to be a new first battery pack, and the process returns to the step of performing discharge detection and discharge condition judgment on the first battery pack until the discharge condition of any one of the multiple battery packs is normal.

[0036] In this embodiment, when the lighting device is powered on, the mains voltage connected to the lighting device can be detected to determine whether the mains power connected to the lighting device is normal. For example, if the voltage value of the mains power is too high or too low, it is determined that the mains power connected to the lighting device is abnormal. At this time, the mains power cannot be used to power the light source driving circuit, and it is necessary to switch to the emergency lighting mode; the specific abnormality judgment standard can be set according to the actual situation and user needs. It can be understood that after entering the emergency lighting mode, the battery pack can be controlled to power the light source driving circuit, and the light source driving circuit is used to connect the light source, so that it can be ensured that the light source driving circuit can drive the light source to light up and realize emergency lighting. Furthermore, the battery pack that discharges the light source driving circuit among the multiple battery packs is recorded as the first battery pack, and the remaining battery packs are recorded as the second battery pack. In order to ensure the normal operation of the light source driving circuit, it is also necessary to perform discharge detection and discharge condition judgment on the first battery pack; for example, the discharge current of the first battery pack is detected. If the discharge current is too large, it means that there is a problem in the discharge circuit of the first battery pack and the light source driving circuit. At this time, the first battery pack is recorded as a faulty battery pack, and the fault can be reported to the server or the cloud; then one of the battery packs in the second battery pack is updated to the first battery pack, the light source driving circuit is discharged, and the steps of discharge detection and discharge condition judgment on the first battery pack are repeated until the discharge condition of the first battery pack is normal. The specific judgment standard for the abnormal discharge condition of the first battery pack can be set according to the actual situation and user needs. This scheme sets multiple battery packs and performs discharge detection and discharge condition judgment on the first battery pack. When one or several battery packs have abnormal discharge conditions, a new battery pack can be replaced to power the light source driving circuit, thereby ensuring that the light source of the emergency lighting can emit light normally, so that the reliability of the power supply to the light source driving circuit can be improved in the emergency lighting mode. The replacement order of multiple battery packs can also be preset. In the actual working process, multiple battery packs can be replaced according to the preset replacement order. In addition, in the emergency lighting mode, the voltage of the mains can be continuously detected. If it is detected that the voltage of the mains returns to normal, the emergency lighting mode can be exited and the output voltage of the mains continues to power the light source driving circuit.

[0037] The battery control method of the emergency lighting circuit proposed in the technical solution of the present invention determines whether the mains power connected to the lighting device is normal when the lighting device is powered on; when the mains power is abnormal, one of the multiple battery groups can be controlled to discharge the light source driving circuit, and the battery group is recorded as the first battery group, and the remaining battery groups are recorded as the second battery group, and the first battery group is discharged and the discharge condition is judged; if the discharge condition of the first battery group is normal, the first battery group can be controlled to discharge the light source driving circuit; if the discharge condition of the first battery group is abnormal, it is recorded as a faulty battery group, and one of the battery groups in the second battery group is controlled to be a new first battery group, and the steps of performing discharge detection and discharge condition judgment on the first battery group are returned until the discharge condition of any battery group in the multiple battery groups is normal. In this way, the battery control method of the emergency lighting circuit of this scheme can supply power to the light source driving circuit through the battery group when the mains power is abnormal, and when a battery group in the multiple battery groups is abnormal, a battery group with normal discharge condition is selected to supply power to the light source driving circuit, thereby improving the reliability of power supply to the light source driving circuit during emergency lighting.

[0038] In one embodiment, when the lighting device is powered on, after the step of determining whether the mains power connected to the lighting device is normal, the following steps are also included: When the mains power is normal, the mains power is controlled to supply power to the lighting equipment, and the mains power is controlled to charge the multiple battery packs in sequence.

[0039] In this embodiment, when the voltage of the lighting device connected to the mains is normal, the output voltage of the mains can be used to power the light source of the lighting device; the mains can also be controlled to charge multiple battery packs in sequence, thereby ensuring that the battery packs can power the light source driving circuit when the mains is abnormal. Charging the battery packs in sequence can ensure that when the mains is abnormal, not all battery packs are in a charging state and cannot power the light source driving circuit.

[0040] Furthermore, in one embodiment, the emergency lighting circuit includes a charging circuit, and the step of controlling the multiple battery packs to be charged cyclically in sequence specifically includes: The control charging circuit sequentially cyclically charges the multiple battery packs, each battery pack is charged for a preset cycle, and when the mains power is abnormal, the timing of the preset cycle is suspended until the mains power returns to normal.

[0041] In this embodiment, the charging circuit can convert the output voltage of the mains into a suitable voltage to charge the battery pack, so as to avoid the mains output voltage being too high and causing damage to the batteries in the battery pack. A preset cycle for charging each battery pack can be one day, and can also be set according to actual conditions and user needs, which is not limited here. And the charging can be timed by a timer, and after reaching a preset cycle, it is replaced with the next battery pack for charging. It should be noted that in the case of abnormal mains power, the battery pack needs to power the light source driving circuit and will not charge. Therefore, the timer can suspend the timing of the battery pack charging time until the mains power is normal, and then start timing again.

[0042] Reference Figure 2 In one embodiment, the step of determining whether the mains power connected to the lighting device is normal specifically includes: S110, obtaining a voltage value of the mains power and comparing it with a preset voltage value range; S120, if the voltage value of the mains power is within the preset voltage value range, it is determined that the mains power connected to the lighting device is normal; S130: If the voltage value of the AC power is not within the preset voltage value range, it is determined that the AC power connected to the lighting device is abnormal.

[0043] In this embodiment, the acquired AC power voltage value can be compared with the preset voltage value range required for normal lighting according to the relevant standard requirements of emergency lighting; if the real-time acquired AC power voltage value is within the preset voltage value range, it is considered that the AC power voltage meets the requirements, and the AC power connected to the lighting device is judged to be normal. At this time, the light source driving circuit of the emergency lighting can be turned off through the enabling end; if the real-time acquired AC power voltage value is not within the preset voltage value range, it is considered that the AC power voltage does not meet the requirements, and the AC power connected to the lighting device is abnormal, and the emergency lighting state is entered. At this time, the light source driving circuit of the emergency lighting can be turned on through the enabling end, and the battery pack supplies power to the light source driving circuit.

[0044] Reference Figure 3 In one embodiment, the step of performing discharge detection and discharge condition determination on the first battery pack specifically includes: S210, detecting the discharge current of the first battery pack, and comparing it with a preset safe current value range; S220, if the discharge current of the battery pack is within the preset safety current value range, then it is determined that the discharge condition of the first battery pack is normal; S230: If the discharge current of the battery pack is not within the preset safety current value range, determine that the discharge condition of the first battery pack is abnormal.

[0045] In this embodiment, when entering the emergency lighting state, the light source driving circuit is connected to the first battery pack, the light source driving circuit is enabled to light the light source, and the discharge current of the first battery pack is detected in real time. If the AC power remains abnormal, the discharge current of the first battery pack is detected continuously. While performing discharge detection on the first battery pack, it is also possible to detect in real time whether the AC power supply is normal. If the AC power supply is normal, the enable end of the light source driving circuit can be turned off, the light source can be turned off, and the charging process of the battery pack can be immediately switched to.

[0046] If the discharge current of the first battery pack is within the preset safety current value range, the discharge of the first battery pack is judged to be normal, and the first battery pack continues to supply power to the light source driving circuit. If the discharge current of the first battery pack is not within the preset safety current value range, the discharge of the first battery pack is judged to be abnormal. The specific preset safety current value range can be set according to actual conditions and user needs.

[0047] In one embodiment, when executing the step of detecting the discharge current of the first battery pack, the following steps are also included: Performing discharge timing on the first battery group; When the discharge time of the first battery pack reaches a preset time or the discharge current of the first battery pack is less than a preset current value, controlling the emergency lighting circuit to exit the emergency lighting mode; When the discharge time of the first battery group does not reach the preset time, it is determined that the discharge condition of the first battery group is abnormal.

[0048] In this embodiment, when detecting the discharge current of the first battery pack, the discharge timing of the first battery pack can also be performed; if the discharge time of the first battery pack reaches the preset time or the discharge current of the first battery pack is less than the preset current value, the emergency lighting can be turned off. It should be noted that in actual applications, if the emergency lighting time is one hour, the preset discharge time of the first battery pack can be set to one hour, and the emergency lighting mode is turned off after the preset time is reached, which can avoid the power consumption of the battery pack; the preset discharge time of the first battery pack can be set according to the actual situation and user needs. When the discharge current of the first battery pack is less than the preset current value, the emergency lighting mode is exited, which can prevent the battery pack from over-discharging and protect the battery pack. Furthermore, when the discharge time of the first battery pack does not reach the preset time, it means that the power of the first battery pack is insufficient, and it is judged that the discharge of the first battery pack is abnormal.

[0049] The present invention also provides an emergency lighting circuit based on the battery control method of the emergency lighting circuit.

[0050] Reference Figure 4 In one embodiment, the emergency lighting circuit comprises: Battery pack charge and discharge management circuit 20; light source; A light source driving circuit 30, wherein the input end of the light source driving circuit 30 is connected to the output end of the battery pack charge and discharge management circuit 20, and the driving end of the light source driving circuit 30 is connected to the controlled end of the light source; The control circuit 10 has an output end connected to an input end of the battery pack charge and discharge management circuit 20. The control circuit 10 is used to control the battery pack charge and discharge management circuit 20 to supply power to the light source driving circuit 30 to drive the light source to work when an abnormality in the mains power is detected.

[0051] In this embodiment, the battery pack charge and discharge management circuit 20 can be composed of devices such as relays and triodes, and the charging and discharging of the battery pack can be controlled by the battery pack charge and discharge management circuit 20. The control circuit 10 can be composed of devices such as a controller, a resistor and an optocoupler. The controller can be a digital signal processor (Digital Signal Processor, referred to as DSP), a programmable logic device (Programmable Logic Device, referred to as PLD), a field programmable gate array (Field Programmable Gate Array, referred to as FPGA), a microprocessor, an MCU microcontroller or other electronic components. The controller can also store a program for implementing the battery control method of the above-mentioned emergency lighting circuit. The specific circuit structure of the control circuit 10 can be referred to Figure 5 In this embodiment, two battery packs (referred to as battery pack 1 and battery pack 2) are used. Figure 5 The working principle of the control circuit 10 is explained by taking BT1 and BT2 in the figure as an example: the 4th pin of the controller determines whether the mains power is normal according to the high or low level of the receiving side of the optocoupler OP1B: when the mains power is normal, the receiving side of the optocoupler OP1B connected to the 4th pin of the controller is at a low level, and the 6th pin of the controller outputs a high level to enable the charging circuit 40; the 3rd pin of the controller outputs a periodic signal through the resistor R1, and the transistor Q1 controls the on and off of the relay K1 coil, so that the contacts of the relay switch the battery pack 1 and the battery pack 2 to be periodically connected to the charging circuit 40 for charging, thereby realizing periodic charging; the 5th pin of the controller outputs a periodic signal through the resistor R1, and the transistor Q1 controls the on and off of the relay K1 coil, so that the contacts of the relay switch the battery pack 1 and the battery pack 2 to be periodically connected to the charging circuit 40 for charging, thereby realizing periodic charging; The controller outputs a low level to the enable end of the light source driving circuit 30, turning off the light source driving circuit 30; when the mains power is abnormal, the receiving side of the optocoupler OP1B connected to the 4th pin of the controller is high level, and the 6th pin of the controller outputs a low level to turn off the charging circuit 40; the output signal of the 3rd pin of the controller maintains the status quo; the 2nd pin of the controller is inverted according to the level of the 3rd pin, that is, if the 3rd pin is high level at this time, the 2nd pin outputs a low level, if the 3rd pin is low level at this time, the 2nd pin outputs a high level, and the 5th pin of the controller outputs a high level to the enable end of the light source driving circuit 30, turning on the light source driving circuit 30 to light up the light source; The specific circuit structure of the light source driving circuit 30 can be referred to Figure 6 The light source driving circuit 30 has an enable control terminal En-d, and the control circuit 10 controls its enable terminal En-d to control its operation or shutdown, that is, to turn on or off the emergency lighting; the resistor R3 can also be used to detect whether the discharge current of the battery pack 1 and the battery pack 2 is normal during discharge.

[0052] In one embodiment, the battery pack charge and discharge management circuit 20 includes: Multiple battery packs; A charging management circuit, wherein the input end of the charging management circuit is used to connect to the mains circuit, the controlled end of the charging management circuit is connected to the output end of the control circuit 10, and the output end of the charging management circuit is connected to the input end of the plurality of battery packs. The charging management circuit is used to output the output voltage of the mains circuit to the plurality of battery packs for charging when receiving the charging signal output by the control circuit 10; A discharge management circuit, wherein the input end of the discharge management circuit is connected to the output ends of the multiple battery packs, the controlled end of the discharge management circuit is connected to the output end of the control circuit 10, the output end of the discharge management circuit is connected to the input end of the light source driving circuit 30, and the charging management circuit is used to discharge one battery pack among the multiple battery packs to the light source driving circuit 30 when receiving a discharge signal output by the control circuit 10.

[0053] In this embodiment, the charging management circuit is composed of a relay K1, a transistor Q1, etc., and its charging state is managed by the control circuit 10. When receiving the charging signal output by the control circuit 10, the output voltage of the mains circuit is output to multiple battery packs for charging; the discharge management circuit is composed of a relay K2, a transistor Q2, etc. The specific circuit structure can be referred to Figure 5 , the control circuit 10 manages its discharge state, and upon receiving the discharge signal output by the control circuit 10, one of the multiple battery packs discharges to the light source driving circuit 30; the specific circuit structure can refer to Figure 6 , where BAT+ represents the positive electrode of the battery pack and BAT- represents the negative electrode of the battery pack.

[0054] In one embodiment, the emergency lighting circuit further includes: A charging circuit 40, wherein the input end of the charging circuit 40 is used to connect to the mains circuit, and the output end of the charging circuit 40 is connected to the input end of the battery pack charge and discharge management circuit 20, and the charging circuit 40 is used to convert the output voltage of the mains circuit and output it to the battery pack charge and discharge management circuit 20; A mains detection circuit 50, wherein the detection end of the mains detection circuit 50 is used to connect to the mains loop, the output end of the mains detection circuit 50 is connected to the input end of the control circuit 10, and the mains detection circuit 50 is used to detect the voltage of the mains loop and output a mains detection signal to the control circuit 10; The power supply circuit 60 has an input end connected to the output ends of the plurality of battery packs, and an output end connected to the power supply end of the control circuit 10. The power supply circuit 60 is used to convert the output voltage of the battery pack and output it to the control circuit 10.

[0055] In this embodiment, the charging circuit 40 can convert the mains electricity into the voltage required for battery charging. The specific circuit structure can be referred to Fig. 9 The control circuit 10 can control the enable terminal En-c to control the charging circuit 40 to work or shut down, where L represents the live wire, N represents the neutral wire, Vout+ is the positive output terminal, and Vout- is the negative output terminal. The mains detection circuit 50 can detect whether the mains power supply voltage is normal and whether it needs to be switched to emergency lighting. The mains detection circuit 50 can be composed of a diode D3, a resistor R4, a resistor R5, a capacitor C3, an optical coupler OP1A and other components. The specific circuit structure can be referred to Figure 8 When the mains voltage is normal, the transmitting side of the optocoupler OP1A emits light normally. When the mains voltage is abnormal, the transmitting side of the optocoupler OP1A does not emit light. The power supply circuit 60 can be composed of a diode D1, a diode D2, a capacitor C1, a DC / DC module Q3, a capacitor C2, etc. The specific circuit structure can be referred to Figure 7 ; Diode D1 and diode D2 are respectively connected to battery pack 1 and battery pack 2, namely BT1 and BT2. As long as one of the battery packs is normal, the power supply of the control circuit 10 can be guaranteed to be normal.

[0056] The present invention also provides a lighting device.

[0057] In one embodiment, the lighting device includes the emergency lighting circuit as described above. It is understandable that, since the emergency lighting circuit is used in the lighting device of the present invention, the embodiments of the lighting device of the present invention include all technical solutions of all embodiments of the emergency lighting circuit, and the technical effects achieved are also exactly the same, which will not be described in detail here.

[0058] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A battery control method for an emergency lighting circuit, applied to lighting equipment, characterized in that: The emergency lighting circuit includes a plurality of battery packs and a light source driving circuit. The battery control method of the emergency lighting circuit includes the following steps: When the lighting equipment is powered on, determine whether the mains power connected to the lighting equipment is normal; When the mains power is abnormal, one of the multiple battery groups is controlled to discharge the light source driving circuit, the battery group is recorded as the first battery group, and the remaining battery groups are recorded as the second battery group, and the first battery group is tested for discharge and the discharge condition is judged; If the discharge condition of the first battery pack is normal, controlling the first battery pack to discharge the light source driving circuit; If the discharge condition of the first battery pack is abnormal, it is recorded as a faulty battery pack, and one of the second battery packs is controlled to be a new first battery pack, and the process returns to the steps of performing discharge detection and discharge condition judgment on the first battery pack until the discharge condition of any one of the multiple battery packs is normal.

2. The battery control method for an emergency lighting circuit according to claim 1, characterized in that: When the lighting device is powered on, after the step of determining whether the mains power connected to the lighting device is normal, the following steps are also included: When the mains power is normal, the mains power is controlled to supply power to the lighting equipment, and the mains power is controlled to charge the multiple battery packs in sequence.

3. The battery control method for emergency lighting circuit according to claim 2, characterized in that: The emergency lighting circuit includes a charging circuit, and the step of controlling the multiple battery packs to charge cyclically in sequence specifically includes: The control charging circuit sequentially cyclically charges the multiple battery packs, each battery pack is charged for a preset cycle, and when the mains power is abnormal, the timing of the preset cycle is suspended until the mains power returns to normal.

4. The battery control method for an emergency lighting circuit according to claim 1, characterized in that: The step of determining whether the mains power connected to the lighting device is normal specifically includes: Obtaining the voltage value of the mains power and comparing it with a preset voltage value range; If the voltage value of the mains is within the preset voltage value range, it is determined that the mains power connected to the lighting device is normal; If the voltage value of the mains power is not within the preset voltage value range, it is determined that the mains power connected to the lighting device is abnormal.

5. The battery control method for an emergency lighting circuit according to claim 1, characterized in that: The steps of performing discharge detection and discharge condition judgment on the first battery pack specifically include: Detecting the discharge current of the first battery pack and comparing it with a preset safe current value range; If the discharge current of the battery pack is within the preset safe current value range, it is determined that the discharge condition of the first battery pack is normal; If the discharge current of the battery pack is not within the preset safe current value range, it is determined that the discharge condition of the first battery pack is abnormal.

6. The battery control method for an emergency lighting circuit according to claim 5, characterized in that: When executing the step of detecting the discharge current of the first battery pack, the following steps are also included: Performing discharge timing on the first battery group; When the discharge time of the first battery pack reaches a preset time or the discharge current of the first battery pack is less than a preset current value, controlling the emergency lighting circuit to exit the emergency lighting mode; When the discharge time of the first battery group does not reach the preset time, it is determined that the discharge condition of the first battery group is abnormal.

7. An emergency lighting circuit based on the battery control method of the emergency lighting circuit according to any one of claims 1 to 6, characterized in that: The emergency lighting circuit comprises: Battery pack charge and discharge management circuit; light source; A light source driving circuit, wherein the input end of the light source driving circuit is connected to the output end of the battery pack charge and discharge management circuit, and the driving end of the light source driving circuit is connected to the controlled end of the light source; A control circuit, wherein the output end of the control circuit is connected to the input end of the battery pack charge and discharge management circuit, and the control circuit is used to control the battery pack charge and discharge management circuit to supply power to the light source driving circuit to drive the light source to work when an abnormality in the mains power is detected.

8. The emergency lighting circuit according to claim 7, characterized in that: The battery pack charge and discharge management circuit comprises: Multiple battery packs; A charging management circuit, wherein the input end of the charging management circuit is used to connect to the mains circuit, the controlled end of the charging management circuit is connected to the output end of the control circuit, the output end of the charging management circuit is connected to the input end of the plurality of battery packs, and the charging management circuit is used to output the output voltage of the mains circuit to the plurality of battery packs for charging when receiving the charging signal output by the control circuit; A discharge management circuit, wherein the input end of the discharge management circuit is connected to the output ends of the multiple battery packs, the controlled end of the discharge management circuit is connected to the output end of the control circuit, the output end of the discharge management circuit is connected to the input end of the light source driving circuit, and the discharge management circuit is used to discharge one battery pack among the multiple battery packs to the light source driving circuit when receiving a discharge signal output by the control circuit.

9. The emergency lighting circuit according to claim 7, characterized in that: The emergency lighting circuit also includes: A charging circuit, wherein the input end of the charging circuit is used to connect to the mains circuit, the output end of the charging circuit is connected to the input end of the battery pack charge and discharge management circuit, and the charging circuit is used to convert the output voltage of the mains circuit and output it to the battery pack charge and discharge management circuit; A mains power detection circuit, wherein the detection end of the mains power detection circuit is used to connect to the mains power loop, the output end of the mains power detection circuit is connected to the input end of the control circuit, the mains power detection circuit is used to detect the voltage of the mains power loop, and output a mains power detection signal to the control circuit; A power supply circuit, wherein the input end of the power supply circuit is connected to the output ends of the plurality of battery packs, the output end of the power supply circuit is connected to the power supply end of the control circuit, and the power supply circuit is used to convert the output voltage of the battery pack and output it to the control circuit.

10. A lighting device, characterized in that: Comprising the emergency lighting circuit as described in any one of claims 7 to 9.

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