Battery temperature control protection circuit, battery module and emergency lamp

Abstract

The utility model discloses a battery temperature control protection circuit, a battery module and an emergency lamp, the battery temperature control protection circuit comprises a data acquisition module, a turn-off protection module, a charge and discharge detection module and a control module, the data acquisition module is connected with a battery to be detected and is used for acquiring voltage data; the charging and discharging detection module is used for detecting whether the to-be-detected battery is in a charging state or a discharging state; the turn-off protection module is connected with the to-be-detected battery and is used for turning off a charging path of the to-be-detected battery; the control module is used for controlling the turn-off protection module to turn off a charging path of the to-be-detected battery when it is judged that the to-be-detected battery is abnormal in temperature according to the voltage data and it is judged that the to-be-detected battery is in a charging state according to the charging and discharging detection module. When the temperature of the battery of the emergency lamp is abnormal and the battery is in the charging state, the charging path of the battery is turned off, adverse effects on the battery are reduced as much as possible, and then the probability of faults in subsequent use of the emergency lamp is reduced.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and more specifically, to a battery temperature control protection circuit, a battery module, and an emergency light. Background Technology

[0002] Emergency lights are lighting fixtures used to facilitate evacuation, ensure safety, or allow continued work when the normal lighting system fails and ceases to provide illumination. Emergency lights come in many types and have various applications, and are widely used.

[0003] Emergency lights are primarily powered by batteries, which are generally rechargeable. Currently, most emergency lights do not have corresponding protection measures for their batteries. Due to the influence of ambient temperature and battery charging heat, the battery temperature may be too high or too low during charging, which can adversely affect the battery and lead to malfunctions in the subsequent use of the emergency light. Utility Model Content

[0004] The purpose of this application is to provide a battery temperature control protection circuit, a battery module, and an emergency light, which shuts off the battery charging path when the battery of the emergency light has an abnormal temperature and is in a charging state, so as to minimize the adverse effects on the battery and reduce the probability of subsequent failures in the use of the emergency light.

[0005] To achieve the above objectives, firstly, this application provides a battery temperature control and protection circuit, including a data acquisition module, a shutdown protection module, a charge / discharge detection module, and a control module.

[0006] The data acquisition module is connected to the battery under test and is used to collect voltage data;

[0007] The charge / discharge detection module is used to detect whether the battery under test is in a charging or discharging state.

[0008] The shutdown protection module is connected to the battery under test and is used to shut down the charging path of the battery under test.

[0009] The control module is connected to the battery under test, the data acquisition module, the charge / discharge detection module, and the shutdown protection module. It is used to control the shutdown protection module to shut down the charging path of the battery under test when the voltage data indicates that the battery under test has an abnormal temperature and the charge / discharge detection module indicates that the battery under test is in a charging state.

[0010] In a preferred embodiment of this application, the data acquisition module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a thermistor, and a capacitor.

[0011] The first end of the first resistor is connected to the VDD terminal, and the second end of the first resistor is connected to the control module; the first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the control module; the first end of the third resistor is connected to the second end of the second resistor, and the second end of the third resistor is connected to the control module; the first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is connected to the second end of the thermistor.

[0012] The first end of the thermistor is connected to the second end of the first resistor; the first end of the capacitor is connected to the first end of the thermistor, and the second end of the capacitor is connected to the second end of the thermistor.

[0013] In a preferred embodiment of this application, the shutdown protection module includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first MOSFET, a second MOSFET, and a third MOSFET.

[0014] The first end of the fifth resistor is connected to the second end of the tenth resistor, and the second end of the fifth resistor is connected to the first MOSFET; the first end of the sixth resistor is connected to the VCC terminal, and the second end of the sixth resistor is connected to the first MOSFET; the first end of the seventh resistor is connected to the control module, and the second end of the seventh resistor is connected to the second MOSFET; the first end of the eighth resistor is connected to the second MOSFET, and the second end of the eighth resistor is connected to the third MOSFET and the first end of the ninth resistor; the second end of the ninth resistor is grounded; the first end of the tenth resistor is connected to the first end of the eleventh resistor, and the second end of the tenth resistor is also connected to the control module; the second end of the eleventh resistor is connected to the second end of the seventh resistor;

[0015] The first MOSFET, the second MOSFET, and the third MOSFET are all connected to the battery under test.

[0016] In a preferred embodiment of this application, the first MOS transistor is a MOS transistor in an SOP-8 package, and the second MOS transistor and the third MOS transistor each have three ports.

[0017] In a preferred embodiment of this application, the first MOSFET is an 8205 series MOSFET transistor in an SOP-8 package.

[0018] In a preferred embodiment of this application, the charge / discharge detection module includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, and a first MOSFET.

[0019] The first and second ends of the thirteenth resistor are both connected to the control module; the first end of the fourteenth resistor is connected to the control module, and the second end of the fourteenth resistor is grounded; the first end of the fifteenth resistor is connected to the first end of the fourteenth resistor, and the second end of the fifteenth resistor is connected to the first MOS transistor; the first end of the sixteenth resistor is connected to the control module, and the second end of the sixteenth resistor is connected to the first MOS transistor.

[0020] In a preferred embodiment of this application, the control module is a voltage comparator.

[0021] In a preferred embodiment of this application, the control module employs a voltage comparator LM339.

[0022] Secondly, this application provides a battery module, including a battery body and the aforementioned battery temperature control protection circuit, wherein the battery temperature control protection circuit is connected to the battery body, and the battery body uses a single cell or multiple cells.

[0023] Thirdly, this application provides an emergency light, including the aforementioned battery module.

[0024] This application discloses a battery temperature control protection circuit, a battery module, and an emergency light, which, compared with the prior art, have at least the following advantages:

[0025] This application adds a battery protection circuit, which is particularly suitable for emergency light batteries. By connecting a data acquisition module to the battery under test, voltage data is collected, which is then used by the control module to determine whether the battery under test has an abnormal temperature. The charge and discharge detection module is used to detect whether the battery under test is in a charging or discharging state. When the battery under test has an abnormal temperature and is in a charging state, the control module controls the shutdown protection module to shut down the charging path of the battery under test, stopping the charging of the battery under test. This minimizes the adverse effects of charging on the battery when the temperature is abnormal, thereby reducing the probability of subsequent malfunctions in the emergency light. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the battery temperature control protection circuit provided in the embodiments of this application.

[0028] Figure reference numerals: BATT - Input terminal of the battery under test; JK1 - Output terminal of the battery under test; U1 - Voltage comparator; D1 - Diode; C1 - First capacitor; C2 - Second capacitor; RT2 - Thermistor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; R7 - Seventh resistor; R8 - Eighth resistor; R9 - Ninth resistor; R10 - Tenth resistor; R11 - Eleventh resistor; R12 - Twelfth resistor; R13 - Thirteenth resistor; R14 - Fourteenth resistor; R15 - Fifteenth resistor; R16 - Sixteenth resistor; R17 - Seventeenth resistor; R18 - Eighteenth resistor; R19 - Nineteenth resistor; Q1 - First MOSFET; Q2 - Second MOSFET; Q3 - Third MOSFET. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0034] See Figure 1 , Figure 1 This is a schematic diagram of the battery temperature control protection circuit provided in the embodiments of this application.

[0035] The battery temperature control protection circuit of this application embodiment includes a data acquisition module, a shutdown protection module, a charge / discharge detection module, and a control module.

[0036] The data acquisition module is connected to the battery under test and is used to collect voltage data; the charge / discharge detection module is used to detect whether the battery under test is in a charging or discharging state; the shutdown protection module is connected to the battery under test and is used to shut off the charging path of the battery under test.

[0037] The control module connects the battery under test, the data acquisition module, the charge / discharge detection module, and the shutdown protection module. It is used to control the shutdown protection module to shut down the charging path of the battery under test when the voltage data indicates that the battery under test has an abnormal temperature and the charge / discharge detection module indicates that the battery under test is in a charging state.

[0038] In one embodiment, the data acquisition module can be set with a thermistor RT2. By changing the resistance of the thermistor RT2 at different temperatures, the data acquisition module can collect different voltage data, so that the control module can determine whether the battery under test has an abnormal temperature based on the voltage data.

[0039] The control module, which connects the charge / discharge detection module and the shutdown protection module, can determine whether the battery under test is in a charging or discharging path through the charge / discharge detection module, and thus determine whether the battery under test is in a charging or discharging state. When the battery under test has an abnormal temperature and is in a charging state, the shutdown protection module is controlled to shut down the charging path of the battery under test. By shutting down the charging path of the battery under test, the battery under test is prevented from continuing to heat up through charging, thereby controlling the temperature of the battery under test accordingly.

[0040] The battery temperature control protection circuit of this application embodiment adds a battery protection circuit, which is particularly suitable for emergency light batteries. By connecting to the data acquisition module of the battery under test, voltage data is collected, which is then used by the control module to determine whether the battery under test has an abnormal temperature. The charge and discharge detection module is used to detect whether the battery under test is in a charging or discharging state. Then, when the battery under test has an abnormal temperature and is in a charging state, the control module controls the shutdown protection module to shut off the charging path of the battery under test, stopping the charging of the battery under test. This is to minimize the adverse effects of charging on the battery when the temperature is abnormal, thereby reducing the probability of subsequent failures in the use of the emergency light.

[0041] In one embodiment, the control module is a voltage comparator U1. Using a voltage comparator U1 can easily enable the control module to perform functions such as judging abnormal temperature, judging charging and discharging status, and shutting off the charging path, thereby reducing costs.

[0042] As an optional implementation, the voltage comparator U1 used in the control module is LM339. Using LM339 for voltage comparator U1 can better realize the function of the above-mentioned control module and simplify the structure of the battery temperature control protection circuit in this application embodiment. In the following embodiments, using LM339 for voltage comparator U1 in the control module is used as a specific example to illustrate, explain and interpret other corresponding contents in the embodiments. It should be noted that the control module is not limited to using LM339 for voltage comparator U1, and can also be other IC devices that can realize the function of the above-mentioned control module.

[0043] In this embodiment, the input terminal BATT of the battery under test provides the voltage VDD of the voltage comparator U1 through diode D1, which is connected to pin 3 of the voltage comparator U1. The diode D1 is connected in series with the first capacitor C1 and in parallel with the first capacitor C1 at the input terminal BATT of the battery under test.

[0044] In this embodiment, the data acquisition module includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a thermistor RT2, and a capacitor.

[0045] Specifically, the first end of the first resistor R1 is connected to the VDD terminal, and the second end of the first resistor R1 is connected to the control module; the first end of the second resistor R2 is connected to the first end of the first resistor R1, and the second end of the second resistor R2 is connected to the control module; the first end of the third resistor R3 is connected to the second end of the second resistor R2, and the second end of the third resistor R3 is connected to the control module; the first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is connected to the second end of the thermistor RT2.

[0046] The first terminal of the thermistor RT2 is connected to the second terminal of the first resistor R1; the capacitor is the second capacitor C2, the first terminal of the second capacitor C2 is connected to the first terminal of the thermistor RT2, and the second terminal of the second capacitor C2 is connected to the second terminal of the thermistor RT2.

[0047] Specifically, the first resistor R1 and the thermistor RT2 are connected to pins 9 and 10 of the voltage comparator U1, the second resistor R2 and the third resistor R3 are connected to pin 11 of the voltage comparator U1, and the third resistor R3 and the fourth resistor R4 are connected to pin 8 of the voltage comparator U1. The first resistor R1 and the thermistor RT2 form a voltage divider resistor unit, and the second resistor R2, the third resistor R3 and the fourth resistor R4 form a voltage divider resistor unit.

[0048] With the structure of the data acquisition module described above, voltage data can be acquired relatively easily and effectively for the voltage comparator U1 to determine the temperature of the battery under test, thereby effectively and accurately determining whether the temperature of the battery under test is abnormal, i.e., too high or too low.

[0049] In this embodiment, the shutdown protection module includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first MOSFET Q1, a second MOSFET Q2, and a third MOSFET Q3.

[0050] Specifically, the first end of the fifth resistor R5 is connected to the second end of the tenth resistor R10, and the second end of the fifth resistor R5 is connected to the first MOSFET Q1; the first end of the sixth resistor R6 is connected to the VCC terminal, and the second end of the sixth resistor R6 is connected to the first MOSFET Q1; the first end of the seventh resistor R7 is connected to the control module, and the second end of the seventh resistor R7 is connected to the second MOSFET Q2; the first end of the eighth resistor R8 is connected to the second MOSFET Q2, and the second end of the eighth resistor R8 is connected to the third MOSFET Q3 and the first end of the ninth resistor R9; the second end of the ninth resistor R9 is grounded; the first end of the tenth resistor R10 is connected to the first end of the eleventh resistor R11, and the second end of the tenth resistor R10 is also connected to the control module; the second end of the eleventh resistor R11 is connected to the second end of the seventh resistor R7.

[0051] The first MOSFET Q1, the second MOSFET Q2, and the third MOSFET Q3 are all connected to the battery under test.

[0052] Specifically, pin 1 of voltage comparator U1 is connected between the seventh resistor R7 and the tenth resistor R10.

[0053] The aforementioned shutdown protection module utilizes a connection structure of three MOS transistors and multiple resistors to effectively realize the functions of turning on and off the circuit. Furthermore, when the battery under test has an abnormal temperature and is in a charging state, it can effectively and promptly shut down the charging circuit of the battery under test.

[0054] Optionally, the first MOSFET Q1 is a MOSFET in an SOP-8 package, and the second MOSFET Q2 and the third MOSFET Q3 both have three ports.

[0055] Among them, the first MOSFET Q1 is an SOP-8 packaged MOSFET, that is, the first MOSFET Q1 has eight pins, and the second MOSFET Q2 and the third MOSFET Q3 each have three ports, namely the gate, the source and the drain.

[0056] The first MOSFET Q1 uses an SOP-8 package, which makes it easier to use the shutdown protection module to realize the functions of turning on and off the path.

[0057] Furthermore, the first MOSFET Q1 is an 8205 series MOSFET transistor in an SOP-8 package.

[0058] In this embodiment, the VDD terminal of the voltage comparator U1 is also connected to the twelfth resistor R12 and the seventeenth resistor R17 to divide the voltage to pin 6 of the voltage comparator U1.

[0059] In this embodiment, the charge / discharge detection module includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a first MOSFET Q1.

[0060] Specifically, the first and second ends of the thirteenth resistor R13 are both connected to the control module; the first end of the fourteenth resistor R14 is connected to the control module, and the second end of the fourteenth resistor R14 is grounded; the first end of the fifteenth resistor R15 is connected to the first end of the fourteenth resistor R14, and the second end of the fifteenth resistor R15 is connected to the first MOSFET Q1; the first end of the sixteenth resistor R16 is connected to the control module, and the second end of the sixteenth resistor R16 is connected to the first MOSFET Q1.

[0061] Specifically, the thirteenth resistor R13 is connected to pin 6 of voltage comparator U1, the fourteenth resistor R14 and the fifteenth resistor R15 are connected to pin 4 of voltage comparator U1, and the sixteenth resistor R16 is connected to pin 5 of voltage comparator U1.

[0062] The structure of the charge / discharge detection module described above enables the voltage comparator U1 to easily and effectively determine whether the battery under test is in a charging or discharging state.

[0063] In this embodiment, pin 7 of voltage comparator U1 is also connected to the VDD terminal through the eighteenth resistor R18, and pins 13 and 7 of voltage comparator U1 are also connected to the nineteenth resistor R19.

[0064] The following is in conjunction with the appendix Figure 1 The working principle of the battery temperature control protection circuit in the embodiments of this application will be explained and described.

[0065] The battery temperature control protection circuit is connected to the battery under test. The input terminal BATT of the battery under test provides the voltage VDD of the voltage comparator U1 through diode D1 and is connected to pin 3 of the voltage comparator U1. Pin 12 of the voltage comparator U1 is GND. The VDD terminal is connected to the second resistor R2, the third resistor R3, and the fourth resistor R4 of the data acquisition module to divide the voltage and provide a stable reference voltage, which is connected to pins 8 and 11 of the voltage comparator U1.

[0066] When the battery under test is charging normally, the VDD terminal is connected to the first resistor R1 and the thermistor RT2 for voltage division. The voltage at pin 11I4+ of voltage comparator U1 is greater than the voltage at pin 10I4-, and the voltage at pin 9I3+ of voltage comparator U1 is greater than the voltage at pin 8I3-. Pins 14 and 13 of voltage comparator U1 output high at O3 and O4 respectively. Pins 14 and 13 of voltage comparator U1 are connected to one end of the nineteenth resistor R19. The VDD terminal is connected to the twelfth resistor R12 and the seventeenth resistor R17 for voltage division, which is connected to pin 6I2- of voltage comparator U1. The voltage at pin 7I2+ is greater than the voltage at pin 6I2-, and pin 1O2 outputs high. Consequently, pins 3 and 5 / 6 of the first MOSFET Q1 are turned on. The second MOSFET Q2 and the third MOSFET Q3 are not turned on. At this time, the output voltage of the battery under test is input to the battery at the output terminal JK1, and the battery is charged through the first MOSFET Q1.

[0067] Understandably, when the battery under test is detected to be charging, the first MOSFET Q1 is turned on, the voltage at pin 5I1+ of voltage comparator U1 is greater than the voltage at pin 4I1-, and pin 2O1 outputs high. The VDD terminal is connected to the thirteenth resistor R13, the twelfth resistor R12 in parallel, and the seventeenth resistor R17 for voltage division. The voltage at pin 7I2+ of voltage comparator U1 is greater than the voltage at pin 6I2-. Pin 1O2 of voltage comparator U1 outputs high. Consequently, pins 3 and 5 / 6 of the first MOSFET Q1 are turned on, the second MOSFET Q2 is not turned on, the third MOSFET Q3 is not turned on, and pins 1 and 7 / 8 of the first MOSFET Q1 are turned on. Thus, the output terminal JK1 of the battery under test receives a voltage from the battery, and the battery is connected to the charging circuit through the first MOSFET Q1. The voltage at pin 5I1+ of voltage comparator U1 can be used to determine that the battery under test is charging.

[0068] When the battery under test is charging and there is an abnormal high temperature, the resistance of thermistor RT2 will be low. The VDD terminal is connected to the first resistor R1 and the thermistor RT2 for voltage division. The voltage at pin 9I3+ of voltage comparator U1 is less than the voltage at pin 8I3-. Pins 14 and 13 of voltage comparator U1 output low at O3 and O4 respectively. Pins 13 and 14 of voltage comparator U1 are connected to one end of the nineteenth resistor R19. The VDD terminal is connected to the eighteenth resistor R18 and the nineteenth resistor R19 for voltage division. The voltage at pin 7I2+ of voltage comparator U1 is less than the voltage at pin 6I2-. Pin 1O2 outputs low. As a result, the second MOSFET Q2 is turned on, the third MOSFET Q3 is turned on, and the first MOSFET Q1 is turned off, thereby turning off the charging path of the battery.

[0069] When the battery under test is charging and there is a low temperature anomaly, the resistance of thermistor RT2 will be high. The VDD terminal is connected to the first resistor R1 and the thermistor RT2 for voltage division. The voltage at pin 11I4+ of voltage comparator U1 is less than the voltage at pin 10I4-. The outputs of pins 14 and 13 of voltage comparator U1, corresponding to O3 and O4, are low. Pins 13 and 14 of voltage comparator U1 are connected to one end of the nineteenth resistor R19. The VDD terminal is connected to the eighteenth resistor R18 and the nineteenth resistor R19 for voltage division. The voltage at pin 7I2+ of voltage comparator U1 is less than the voltage at pin 6I2-. The output of pin 1O2 is low. As a result, the second MOSFET Q2 is turned on, the third MOSFET Q3 is turned on, and the first MOSFET Q1 is turned off, thereby turning off the charging path of the battery.

[0070] When the battery under test is detected to be in a discharging state, the first MOSFET Q1 is turned on, the voltage at pin 5I1+ of voltage comparator U1 is less than the voltage at pin 4I1-, and the output at pin 2O1 is low; the VDD terminal is connected to the twelfth resistor R12, the thirteenth resistor R13, and the seventeenth resistor R17 in parallel to divide the voltage, the voltage at pin 7I2+ of voltage comparator U1 is greater than the voltage at pin 6I2-, and the output at pin 1O2 is high; then, pins 3 and 5 / 6 of the first MOSFET Q1 are turned on, the second MOSFET Q2 is not turned on, the third MOSFET Q3 is not turned on, and pins 1 and 7 / 8 of the first MOSFET Q1 are turned on. Thus, the positive terminal of the battery under test is discharged through the output terminal JK1 of the battery under test → the first MOSFET Q1 → the negative terminal of the battery under test. The discharge state of the battery under test can be determined by the aforementioned pins of voltage comparator U1.

[0071] When the battery under test is in a discharged state and there is an abnormal high or low temperature, the first MOSFET Q1 is turned on. The voltage at pin 5I1+ of voltage comparator U1 is less than the voltage at pin 4I1-, and the output at pin 2O1 is low. The VDD terminal is connected to the twelfth resistor R12, the thirteenth resistor R13, and the seventeenth resistor R17 in parallel to divide the voltage. The voltage at pin 7I2+ of voltage comparator U1 is greater than the voltage at pin 6I1-. 2-Voltage, pin 1O2 outputs high; consequently, pins 3 and 5 / 6 of the first MOSFET Q1 are turned on, the second MOSFET Q2 is not turned on, the third MOSFET Q3 is not turned on, and pins 1 and 7 / 8 of the first MOSFET Q1 are turned on. Thus, the positive terminal of the battery under test is connected through the output terminal JK1 of the battery under test → the first MOSFET Q1 → the negative terminal of the battery under test to continue discharging; the battery temperature control protection circuit is set to maintain the discharge without turning off the discharge when the battery under test is in the discharge state and there is a high temperature or low temperature abnormality. This allows the emergency light battery to continue to operate even when it is in a high temperature or low temperature abnormality, thereby ensuring the use of the emergency light and giving full play to the emergency use characteristics of the emergency light.

[0072] This application embodiment also provides a battery module, including a battery body and the aforementioned battery temperature control protection circuit. The battery temperature control protection circuit is connected to the battery body, and the battery body uses a single battery or multiple batteries.

[0073] The battery module in this application embodiment does not require any changes to the original battery. It can be applied to emergency lights simply by connecting a battery temperature control protection circuit. Furthermore, the battery body can use a single battery or multiple batteries, and can also use different types of batteries suitable for emergency lights, which can better meet the relevant new standards for emergency lights.

[0074] This application also provides an emergency light, including the battery module described above.

[0075] The emergency light in this embodiment is equipped with a battery temperature control protection circuit, which can minimize the adverse effects on the battery during charging when the temperature is abnormal, thereby reducing the probability of malfunctions in the subsequent use of the emergency light.

[0076] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0077] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0078] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0079] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A battery temperature control and protection circuit, characterized in that, It includes a data acquisition module, a shutdown protection module, a charge / discharge detection module, and a control module. The data acquisition module is connected to the battery under test and is used to collect voltage data; The charge / discharge detection module is used to detect whether the battery under test is in a charging or discharging state. The shutdown protection module is connected to the battery under test and is used to shut down the charging path of the battery under test. The control module is connected to the battery under test, the data acquisition module, the charge / discharge detection module, and the shutdown protection module. It is used to control the shutdown protection module to shut down the charging path of the battery under test when the voltage data indicates that the battery under test has an abnormal temperature and the charge / discharge detection module indicates that the battery under test is in a charging state.

2. The battery temperature control protection circuit according to claim 1, characterized in that, The data acquisition module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a thermistor, and a capacitor. The first end of the first resistor is connected to the VDD terminal, and the second end of the first resistor is connected to the control module; the first end of the second resistor is connected to the first end of the first resistor, and the second end of the second resistor is connected to the control module; the first end of the third resistor is connected to the second end of the second resistor, and the second end of the third resistor is connected to the control module; the first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is connected to the second end of the thermistor. The first end of the thermistor is connected to the second end of the first resistor; the first end of the capacitor is connected to the first end of the thermistor, and the second end of the capacitor is connected to the second end of the thermistor.

3. The battery temperature control protection circuit according to claim 1, characterized in that, The shutdown protection module includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first MOSFET, a second MOSFET, and a third MOSFET. The first end of the fifth resistor is connected to the second end of the tenth resistor, and the second end of the fifth resistor is connected to the first MOSFET; the first end of the sixth resistor is connected to the VCC terminal, and the second end of the sixth resistor is connected to the first MOSFET; the first end of the seventh resistor is connected to the control module, and the second end of the seventh resistor is connected to the second MOSFET; the first end of the eighth resistor is connected to the second MOSFET, and the second end of the eighth resistor is connected to the third MOSFET and the first end of the ninth resistor; the second end of the ninth resistor is grounded; the first end of the tenth resistor is connected to the first end of the eleventh resistor, and the second end of the tenth resistor is also connected to the control module; the second end of the eleventh resistor is connected to the second end of the seventh resistor; The first MOSFET, the second MOSFET, and the third MOSFET are all connected to the battery under test.

4. The battery temperature control protection circuit according to claim 3, characterized in that, The first MOSFET is a MOSFET in an SOP-8 package, and the second and third MOSFETs each have three ports.

5. The battery temperature control protection circuit according to claim 4, characterized in that, The first MOSFET is an 8205 series MOSFET transistor in an SOP-8 package.

6. The battery temperature control protection circuit according to claim 1, characterized in that, The charge / discharge detection module includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, and a first MOSFET. The first and second ends of the thirteenth resistor are both connected to the control module; the first end of the fourteenth resistor is connected to the control module, and the second end of the fourteenth resistor is grounded; the first end of the fifteenth resistor is connected to the first end of the fourteenth resistor, and the second end of the fifteenth resistor is connected to the first MOS transistor; the first end of the sixteenth resistor is connected to the control module, and the second end of the sixteenth resistor is connected to the first MOS transistor.

7. The battery temperature control protection circuit according to any one of claims 1-6, characterized in that, The control module is a voltage comparator.

8. The battery temperature control protection circuit according to claim 7, characterized in that, The control module uses a voltage comparator LM339.

9. A battery module, characterized in that, The battery includes a battery body and a battery temperature control protection circuit as described in any one of claims 1-8, wherein the battery temperature control protection circuit is connected to the battery body, and the battery body uses a single cell or multiple cells.

10. An emergency light, characterized in that, Includes the battery module as described in claim 9.

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