CN210957837U - Detection control circuit, battery pack and electric tool - Google Patents
Detection control circuit, battery pack and electric tool Download PDFInfo
- Publication number
- CN210957837U CN210957837U CN201922006502.6U CN201922006502U CN210957837U CN 210957837 U CN210957837 U CN 210957837U CN 201922006502 U CN201922006502 U CN 201922006502U CN 210957837 U CN210957837 U CN 210957837U
- Authority
- CN
- China
- Prior art keywords
- module
- controller
- energy storage
- storage module
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model is suitable for the technical field of electronic circuits, and provides a detection control circuit, a battery pack and an electric tool, wherein the circuit comprises an energy storage module, an on-off module, a control module and a controller; the on-off module is respectively connected with the control module and the discharging cathode and the charging cathode of the energy storage module and is used for correspondingly controlling the on-off state between the discharging cathode and the charging cathode according to the switching signal output by the control module; the control module is respectively connected with the anode, the charging cathode, the on-off module and the controller of the energy storage module and is used for correspondingly controlling the on-off state of the on-off module according to a control signal output by the controller; the controller is respectively connected with the charging negative electrode of the energy storage module and the control module and used for outputting a control signal to the control module when the external charging is carried out so as to enable the control module to control the on-off module to be conducted, and the grounding end of the controller is connected with the charging negative electrode of the energy storage module. The utility model provides a big problem of consumption when current charge-discharge keeps apart.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, especially, relate to a detect control circuit, battery package and electric tool.
Background
With the development of scientific technology, more and more electronic products are used by consumers, and the existing electronic products are often equipped with a battery pack, which provides electric energy required by the normal operation of the electronic products through the battery pack, and realizes charging through an external charger when the electric energy of the battery pack is insufficient.
In order to heat a battery pack at a low temperature, a battery pack equipped with a heating module is pushed out, and the battery pack supplies power to the heating module through a charger. When charging at the charger access this moment, its battery package detectable current battery temperature to drive when battery package electricity core temperature is less than preset temperature (for example 5 ℃) and heat the module, in order to avoid having now because the battery package temperature crosses the problem that leads to unable work excessively.
In order to avoid the power loss of the battery, the charger generally supplies power to the heating module when the charger is plugged in so as to heat the battery. Therefore, the connection state of the charger needs to be judged, and the discharge terminal and the charge terminal need to be isolated to accurately and reliably judge the connection state of the charger.
Conventionally, a diode is used to isolate the discharge end and the charge end of the battery pack, but the diode isolation has the disadvantages that the power consumption is large due to large voltage drop, the self heating is serious, and particularly when the charging current is large (for example, larger than 2A). In addition, this results in a reduction in the charging voltage of the battery, and the additional power loss on the diode results in a reduction in the charging efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a detect control circuit, aim at solving the problem that the consumption that current charge-discharge adopted the diode to lead to is big, charge efficiency reduces when keeping apart.
The embodiment of the utility model provides a realize like this, a detect control circuit, the circuit includes:
the device comprises an energy storage module, an on-off module, a control module and a controller;
the on-off module is respectively connected with the control module and the discharging cathode and the charging cathode of the energy storage module and is used for correspondingly controlling the on-off state between the discharging cathode and the charging cathode according to the switching signal output by the control module;
the control module is respectively connected with the anode of the energy storage module, the charging cathode, the on-off module and the controller and is used for correspondingly controlling the on-off state of the on-off module according to a control signal output by the controller;
the controller is respectively connected with the charging negative electrode of the energy storage module and the control module and used for outputting a control signal to the control module when the controller is externally connected with the energy storage module for controlling the on-off module to be conducted, and the grounding end of the controller is connected with the charging negative electrode of the energy storage module.
Furthermore, the circuit also comprises a voltage stabilizing module;
the voltage stabilizing module is respectively connected with the anode of the energy storage module, the charging cathode of the energy storage module and the power supply end of the controller, and is used for stabilizing the input voltage to the voltage required by the operation of the controller and outputting the voltage to the controller.
Furthermore, the circuit also comprises a temperature acquisition module and a heating control module;
the temperature acquisition module is respectively connected with the controller and the charging negative electrode of the energy storage module, and is used for acquiring the temperature of the current environment and outputting the acquired data to the controller;
the heating control module is respectively connected with the anode of the energy storage module, the charging cathode and the controller and is used for controlling the heating state according to the control signal output by the controller.
Furthermore, the control module comprises a first control unit and a second control unit;
the first control unit is respectively connected with the anode of the energy storage module, the on-off module and the second control unit and is used for correspondingly controlling the on-off state of the on-off module according to the control signal output by the second control unit;
the second control unit is respectively connected with the first control unit, the controller and the charging negative electrode of the energy storage module and is used for correspondingly controlling the working state of the first control unit according to the control signal output by the controller.
Furthermore, the on-off module comprises a first field effect transistor, a first resistor and a second resistor;
the first end of the first field effect transistor is connected with the discharging negative electrode of the energy storage module and one end of the first resistor respectively, the second end of the first field effect transistor is connected with the charging negative electrode of the energy storage module, the third end of the first field effect transistor is connected with the other end of the first resistor and one end of the second resistor, and the other end of the second resistor is connected with the control module.
Furthermore, the first control unit comprises a first triode, a third resistor and a fourth resistor;
the first end of the first triode is connected with the anode of the energy storage module and one end of the third resistor, the second end of the first triode is connected with the other end of the third resistor and one end of the fourth resistor, the third end of the first triode is connected with the on-off module, and the other end of the fourth resistor is connected with the second control unit.
Furthermore, the second control unit comprises a second triode, a fifth resistor and a sixth resistor;
the first end of the second triode is connected with the first control unit, the second end of the second triode is respectively connected with one end of a fifth resistor and one end of a sixth resistor, the third end of the second triode is connected with the charging negative electrode of the energy storage module and the other end of the fifth resistor, and the other end of the sixth resistor is connected with the controller.
Furthermore, the voltage stabilizing module is a voltage stabilizer, the input end of the voltage stabilizer is connected with the anode of the energy storage module, the output end of the voltage stabilizer is connected with the power supply end of the controller, and the grounding end of the voltage stabilizer is connected with the charging cathode of the energy storage module.
Furthermore, the temperature acquisition module comprises a seventh resistor and a thermistor, one end of the seventh resistor is connected with a power supply end of the controller, the other end of the seventh resistor and one end of the thermistor are connected with the controller, and the other end of the thermistor is connected with a grounding end of the controller;
the heating control module comprises a second field effect transistor and a heater, the first end of the second field effect transistor is connected with one end of the heater, the other end of the heater is connected with the anode of the energy storage module, the second end of the second field effect transistor is connected with the charging cathode of the energy storage module, and the third end of the second field effect transistor is connected with the controller.
Another embodiment of the present invention further provides a battery pack, wherein the battery pack includes the detection control circuit as described above.
Another embodiment of the present invention further provides an electric tool, which includes the battery pack as described above.
The embodiment of the utility model provides a detection control circuit, owing to set up the controller, its earthing terminal is connected with the negative pole that charges of energy storage module, make detection control circuit when being connected with the charger, its controller just can be in operating condition, and send control signal to control module, owing to set up control module, make can be according to the on-off state of the corresponding control break-make module of control of controller, thereby control the connection state between the negative pole that discharges and the negative pole that charges of energy storage module, thereby when detection control circuit is not connected with the charger, the corresponding control break-make module of its control module breaks off the connection between the negative pole that discharges and the negative pole that charges; when the charging device is connected with a charger, the control module controls the on-off module to conduct connection between the discharging cathode and the charging cathode according to the control of the controller, at the moment, the on-off of the on-off module is controlled by the control module, the on-off module can directly realize isolation or conduction control between the discharging cathode and the charging cathode, the problems of large power consumption, serious heating and charging efficiency reduction caused by large self voltage drop of the existing diode do not exist, and the problems of large power consumption and charging efficiency reduction caused by the adoption of the diode during the existing charging and discharging isolation are solved.
Drawings
Fig. 1 is a schematic block diagram of a detection control circuit according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a detection control circuit according to another embodiment of the present invention;
fig. 3 is a schematic block diagram of a detection control circuit according to another embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a detection control circuit according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model discloses because set up the controller, its earthing terminal is connected with energy storage module's the negative pole that charges, make detection control circuit when being connected with the charger, its controller just can be in operating condition, and send control signal to control module, because set up control module, make can be according to the break-make state of the corresponding control break-make module of control of controller, thereby control energy storage module's the negative pole that discharges and the connected state between the negative pole that charges, the break-make of break-make module is controlled by control module this moment, its break-make module can directly realize the control to the isolation between the negative pole that discharges and the negative pole that charges or switch on, and the diode that does not have the current adoption is because self pressure drop great produced consumption is great, it is serious to generate heat, and the problem that charge efficiency reduces.
Example one
Please refer to fig. 1, which is a schematic block diagram of a detection control circuit according to a first embodiment of the present invention, the detection control circuit includes:
the energy storage module 20, the on-off module 30, the control module 40 and the controller 50;
the on-off module 30 is respectively connected with the control module 40 and the discharging cathode P-and the charging cathode CH-of the energy storage module 20, and is used for correspondingly controlling the on-off state between the discharging cathode P-and the charging cathode CH-according to the switching signal output by the control module 40;
the control module 40 is respectively connected with the positive pole P +, the charging negative pole CH-, the on-off module 30 and the controller 50 of the energy storage module 20, and is used for correspondingly controlling the on-off state of the on-off module 30 according to a control signal output by the controller 50;
the controller 50 is connected to the charging cathode CH-of the energy storage module 20 and the control module 40, and is configured to output a control signal to the control module 40 during external charging, so that the control module 40 controls the on-off module 30 to be turned on, and a ground GND of the controller 50 is connected to the charging cathode CH-of the energy storage module 20.
In an embodiment of the present invention, the energy storage module 20 is a device module for inputting and outputting electric energy, and is a battery pack in particular, that is, when the energy storage module 20 is connected to a charger for external charging, the energy storage module 20 charges according to the electric energy provided by the charger; when the energy storage module 20 is connected to a load for discharging, the energy storage module 20 outputs the stored electric energy to the load.
Further, in practical implementation, as shown in fig. 4, the energy storage module 20 includes a positive electrode B + of the battery pack and a negative electrode B-of the battery pack, which are respectively a positive electrode B + and a negative electrode B-of the battery pack; the energy storage module 20 is further provided with a discharging cathode P-and a charging cathode CH-which are sequentially connected with the cathode B-of the battery pack, wherein the energy storage module 20 is further provided with an anode P + connected with the anode B + of the battery pack, and the anode P + is a common multiplexing electrode for multiplexing a discharging anode and a charging anode.
Further, the positive pole P +, the discharging negative pole P-, and the charging negative pole CH-of the energy storage module 20 are combined to form a three-hole port for plugging and unplugging a charger or a load. When the charger is inserted into the three-hole port, that is, the positive electrode of the charger is connected with the positive electrode P + of the energy storage module 20, and the negative electrode of the charger is connected with the charging negative electrode CH-of the energy storage module 20, at this time, the energy storage module 20 is charged by the charger, and the current flows to the positive electrode P + of the charger, flows to the positive electrode B + of the energy storage module 20, flows to the positive electrode B + of the battery pack connected with the positive electrode P + of the charger, flows to the charging negative electrode CH-of the energy storage module 20 by the negative electrode B-of the battery pack, and finally flows to the negative electrode of the charger, so.
Correspondingly, when a load is inserted into the three-hole port, the positive electrode P + of the energy storage module 20 is connected with the positive electrode of the load, the discharging negative electrode P-of the energy storage module 20 is connected with the negative electrode of the load, at this time, the energy storage module 20 discharges the load, the current flows to the positive electrode P + of the battery pack, flows out to the positive electrode P + of the energy storage module 20, flows to the positive electrode of the load connected with the load, flows to the discharging negative electrode P-of the energy storage module 20 from the negative electrode of the load, and finally flows into the negative electrode B-of the battery pack, so that the discharging of the load is realized.
In an embodiment of the present invention, the on-off module 30 is connected between the discharging negative electrode P-and the charging negative electrode CH-of the energy storage module 20, and controls the on-off state between the discharging negative electrode P-and the charging negative electrode CH-according to the control of the control module 40, and specifically may be a switching device that performs corresponding on-off switching according to the control of the control terminal, including but not limited to a field effect transistor and a triode.
In an embodiment of the present invention, the control module 40 is connected to the positive electrode P +, the charging negative electrode CH-, the on-off module 30 and the controller 50 of the energy storage module 20, respectively, for outputting the switching signal to the on-off module 30 according to the control signal outputted by the controller 50, so as to control the operating state of the on-off module 30 according to the control of the controller 50.
In an embodiment of the present invention, the controller 50 is respectively connected to the charging cathode CH-of the energy storage module 20 and the control module 40, and in the specific implementation, as shown in fig. 4, a voltage stabilizing module 60 is further connected between the power supply terminal VDD of the controller 50 and the anode P + of the energy storage module 20, the voltage stabilizing module 60 is used for stabilizing the input voltage and outputting the stabilized voltage to the power supply terminal VDD of the controller 50, so as to provide the normal working power supply of the controller 50, wherein the voltage stabilizing function of the voltage stabilizing module 60 can avoid the problem that the controller 50 is damaged or powered unstably due to the over-high voltage or unstable voltage of the charger or the energy storage module 20 when the controller 50 is directly connected to the charger or the energy storage module 20.
Further, the ground terminal GND of the controller 50 is connected to the charging negative electrode CH-of the energy storage module 20, and is configured to output a control signal to the control module 40 during external charging, so that the control module 40 controls the on-off module 30 to conduct, wherein it can be known that, since the ground terminal GND of the controller 50 is connected to the charging negative electrode CH-of the energy storage module 20, when the detection control circuit is connected to the load, the controller 50 is in an inactive state because the ground terminal GND of the controller 50 is not connected, only when the detection control circuit is connected to the charger, the positive electrode of the charger is connected to the positive electrode P + of the energy storage module 20, and the negative electrode of the charger is connected to the charging negative electrode CH-of the energy storage module 20, so that the controller 50 is conducted to start to operate, and the discharging negative electrode P-and the charging negative electrode CH-of the energy storage module 20 are driven to communicate, at which point the charger begins to charge the energy storage module 20.
When the detection control circuit is connected with a load during working, the cathode B-of the battery pack is directly connected with the discharging cathode P-of the energy storage module 20, and at the moment, the anode P + and the discharging cathode P-of the energy storage module 20 are respectively connected with the load, and then the electric energy is output to the load, so that the working power supply of the load is provided.
When the detection control circuit is connected to the charger, the detection control circuit starts to be in an off state due to the setting of the on-off module 30, and therefore the discharging cathode P-and the charging cathode CH-of the energy storage module 20 are in an off state, so that the circuit is in an off state, and the charger cannot directly charge the energy storage module 20. Further, when the charger is connected, the electric energy provided by the charger starts to be supplied to the controller 50 and the control module 40 for normal operation, the controller 50 sends a control signal to the control module 40 after being powered on, so that the control module 40 outputs a switch signal to the on-off module 30, and after the on-off module 30 starts to be switched on, the charging negative electrode CH-of the energy storage module 20 is connected with the battery pack negative electrode B-, so that the loop is switched on, and the charger can start to charge the energy storage module 20.
In this embodiment, the controller is provided, and the ground terminal of the controller is connected to the charging negative electrode of the energy storage module, so that the controller can be in a working state and send a control signal to the control module when the detection control circuit is connected to the charger, and the control module is provided, so that the on-off state of the on-off module can be correspondingly controlled according to the control of the controller, and the connection state between the discharging negative electrode and the charging negative electrode of the energy storage module is controlled, and thus the on-off module correspondingly controlled by the control module disconnects the connection between the discharging negative electrode and the charging negative electrode when the detection control circuit is not connected to the charger; when the charging device is connected with a charger, the control module controls the on-off module to conduct connection between the discharging cathode and the charging cathode according to the control of the controller, at the moment, the on-off of the on-off module is controlled by the control module, the on-off module can directly realize isolation or conduction control between the discharging cathode and the charging cathode, the problems of large power consumption, serious heating and charging efficiency reduction caused by large self voltage drop of the existing diode do not exist, and the problems of large power consumption and charging efficiency reduction caused by the adoption of the diode during the existing charging and discharging isolation are solved.
Example two
Please refer to fig. 2, which is a schematic structural diagram of a detection control circuit according to a second embodiment of the present invention, the second embodiment is substantially the same as the first embodiment, and the difference is that in this embodiment, the detection control circuit further includes a voltage stabilizing module 60, a temperature collecting module 70 and a heating control module 80;
the voltage stabilizing module 60 is respectively connected with the positive pole P +, the charging negative pole CH-of the energy storage module 20 and the power supply terminal VDD of the controller 50, and is configured to stabilize the input voltage to the voltage required by the operation of the controller 50 and output the voltage to the controller 50;
the temperature acquisition module 70 is respectively connected with the controller 50 and the charging cathode CH-of the energy storage module 20, and is used for acquiring the temperature of the current environment and outputting the acquired data to the controller 50;
the heating control module 80 is respectively connected to the positive electrode P +, the charging negative electrode CH-, of the energy storage module 20 and the controller 50, and is configured to control the heating state according to a control signal output by the controller 50.
Further, in an embodiment of the present invention, the voltage stabilizing module 60 is used for stabilizing the input voltage, wherein the input voltage may be the voltage when the charger is connected or the voltage when the energy storage module 20 directly discharges, and the voltage stabilizing module 60 may specifically be a voltage Regulator, which includes but is not limited to a LDO voltage Regulator (Low Dropout Regulator) and a DC-DC converter. The voltage outputted by the voltage stabilizing module 60 can be used for the controller 50 to work normally. The ground GND of the controller 50 is connected to the charging negative electrode CH-of the energy storage module 20, so that when the detection control circuit is connected to the charger, the positive electrode of the charger is connected to the positive electrode P + of the energy storage module 20, and the negative electrode of the charger is connected to the charging negative electrode CH-of the energy storage module 20, so that the controller 50 is turned on to start working.
Further, in an embodiment of the present invention, the Temperature acquisition module 70 may specifically use Temperature sensors such as NTC (Negative Temperature coefficient thermistor), thermocouple element, etc., which are used for acquiring specific Temperature under the current environment and converting the Temperature into data information to be output to the controller 50, and the controller 50 may correspondingly determine the Temperature information under the current environment according to the acquired data input by the Temperature acquisition module 70.
Further, in an embodiment of the present invention, the heating control module 80 is used for controlling the heating state according to the control of the controller 50, specifically, the heating control module 80 may include a heater and a driving control unit for controlling the working state of the heater, wherein the heater may be a power resistor, a heating wire, a PTC heater, an electric heating film heating material, or other heating devices, which are set according to the actual use requirement, and are not limited herein.
In normal use, when the detection control circuit is not connected to the charger, the controller 50 is in an off state because the charging negative electrode CH-is not normally grounded, and at this time, the controller 50 cannot acquire the temperature information acquired by the temperature acquisition module 70 and cannot output a control signal to the heating control module 80 to control the operating state of the heating control module 80.
When the detection control circuit is connected with the charger, the electric energy provided by the charger starts to supply power for the controller 50 and the control module 40 to work normally, the controller 50 sends a control signal to the control module 40 after being powered on, so that the control module 40 outputs a switching signal to the on-off module 30, and after the on-off module 30 starts to be switched on, the charging negative electrode CH-of the energy storage module 20 is connected with the battery pack negative electrode B-, so that the loop is switched on, and the charger can start to charge the energy storage module 20. Meanwhile, when the controller 50 starts to acquire the temperature information acquired by the temperature acquisition module 70, and when the controller 50 determines that the acquired temperature value is lower than a first preset temperature value, the controller 50 sends a control signal to the heating control module 80, so that the heating control module 80 starts to perform work heating, wherein the heating control module 80 is connected with the battery pack core of the energy storage module 20, and after the heating control module 80 heats, the heating control module 80 can heat the battery pack core, thereby avoiding the temperature of abnormal charging and discharging caused by the excessively low temperature of the battery pack core.
Further, the controller 50 may also obtain the temperature information collected by the temperature collection module 70 in real time, and when the controller 50 obtains that the heating control module 80 is controlled to heat so that the temperature of the battery pack core is within the second preset temperature range, the controller 50 outputs a control signal to the heating control module 80, so that the heating control module 80 stops heating.
In this embodiment, because the detection control circuit who sets up for can detect the connection status of charger, and when the charger inserted to detection control circuit on, the controller among its detection control circuit worked and output control signal makes the break-make module switch on, thereby make the charger begin to charge to energy storage module, the controller among its detection control circuit can acquire the temperature information that the temperature acquisition module gathered in real time simultaneously, and when the temperature of gathering was less than first predetermined temperature, output control signal to temperature acquisition module, so that heating control module heats battery package electricity core.
EXAMPLE III
Please refer to fig. 3, which is a schematic structural diagram of a detection control circuit according to a third embodiment of the present invention, the third embodiment has a structure substantially the same as that of the second embodiment, and the difference is that in this embodiment, the control module 40 includes a first control unit 41 and a second control unit 42;
the first control unit 41 is respectively connected with the positive pole P +, the on-off module 30 and the second control unit 42 of the energy storage module 20, and is configured to correspondingly control the on-off state of the on-off module 30 according to a control signal output by the second control unit 42;
the second control unit 42 is respectively connected to the first control unit 41, the controller 50, and the charging negative electrode CH-of the energy storage module 20, and is configured to correspondingly control the working state of the first control unit 41 according to the control signal output by the controller 50.
Further, in practical implementation, referring to fig. 4, in an embodiment of the present invention, the on-off module 30 includes a first fet Q1, a first resistor R1, and a second resistor R2;
a first end of the first field effect transistor Q1 is respectively connected with a discharging cathode P-of the energy storage module 20 and one end of the first resistor R1, and a second end of the first field effect transistor Q1 is connected with a charging cathode CH-of the energy storage module 20; the third terminal of the first field effect transistor Q1 is connected to the other terminal of the first resistor R1 and one terminal of the second resistor R2, and the other terminal of the second resistor R2 is connected to the control module 40.
Further, in an embodiment of the present invention, the first control unit 41 includes a first transistor VT1, a third resistor R3, and a fourth resistor R4;
the first end of the first triode VT1 is connected with the positive electrode P + of the energy storage module 20 and one end of the third resistor R3, the second end of the first triode VT1 is connected with the other end of the third resistor R3 and one end of the fourth resistor R4, the third end of the first triode VT1 is connected with the on-off module 30, and the other end of the fourth resistor R4 is connected with the second control unit 42.
Further, in an embodiment of the present invention, the second control unit 42 includes a second transistor VT2, a fifth resistor R5, and a sixth resistor R6;
the first end of the second triode VT2 is connected with the first control unit 41, the second end of the second triode VT2 is connected with one end of the fifth resistor R5 and one end of the sixth resistor R6, the third end of the second triode VT2 is connected with the charging cathode CH-of the energy storage module 20 and the other end of the fifth resistor R5, and the other end of the sixth resistor R6 is connected with the controller 50.
Further, in an embodiment of the present invention, the voltage stabilizing module 60 is a voltage stabilizer, the input terminal of the voltage stabilizer is connected to the positive electrode P + of the energy storage module 20, the output terminal of the voltage stabilizer is connected to the power supply terminal VDD of the controller 50, and the ground terminal GND of the voltage stabilizer is connected to the charging negative electrode CH-of the energy storage module 20. In this embodiment, the voltage regulator is an LDO regulator.
Further, in an embodiment of the present invention, the temperature collecting module 70 includes a seventh resistor R7 and a thermistor RT1, one end of the seventh resistor R7 is connected to the power supply terminal VDD of the controller 50, the other end of the seventh resistor R7 and one end of the thermistor RT1 are connected to the controller 50, and the other end of the thermistor RT1 is connected to the ground terminal GND of the controller 50;
the heating control module 80 comprises a second field effect transistor Q2 and a heater 81, wherein a first end of the second field effect transistor Q2 is connected with one end of the heater 81, the other end of the heater is connected with the positive pole P + of the energy storage module 20, a second end of the second field effect transistor Q2 is connected with the charging negative pole CH-of the energy storage module 20, and a third end of the second field effect transistor Q2 is connected with the controller 50. In specific implementation, the heater 81 is a power resistor R8.
Further, in an embodiment of the present invention, the detection control circuit further includes a protection module 90;
the protection module 90 is connected to the negative electrode of the energy storage module 20 and the discharging negative electrode P-respectively, and is used for protection when the energy storage module 20 is charged and discharged.
Further, in an embodiment of the present invention, the protection module 90 includes a protection chip U1, a sampling resistor Rs, a discharging MOS transistor Q3, and a charging MOS transistor Q4;
the discharge control end DSG of the protection chip U1 is connected with the gate g of the discharge MOS tube Q3, the charge control end CHG of the protection chip U1 is connected with the gate g of the charge MOS tube Q4, the drain d of the charge MOS tube Q4 is connected with the drain d of the discharge MOS tube Q3, the source s of the charge MOS tube Q4 is connected with the discharge cathode P-of the energy storage module 20, the source s of the discharge MOS tube Q3 is connected with one end of the sampling resistor Rs, the other end of the sampling resistor Rs is connected with the cathode of the energy storage module 20, and the protection chip U1 is also connected with the anode and the cathode of each battery in the energy storage module 20.
In an embodiment of the present invention, the first fet Q1 is an NMOS, the first terminal of the first fet Q1 is a source s, the second terminal of the first fet Q1 is a drain d, and the third terminal of the first fet Q1 is a gate g. In this embodiment, when the gate g of the first fet Q1 is at a high level, the first fet Q1 is turned on, whereas when the gate g of the first fet Q1 is at a low level, the first fet Q1 is turned off.
Further, in an embodiment of the present invention, as shown in fig. 4, a fuse F1 is further connected between the positive electrode B + of the battery pack and the positive electrode P + of the energy storage module 20.
Further, in an embodiment of the present invention, the first triode VT1 is a PNP type triode, the first end of the first triode VT1 is the emitter e, the second end of the first triode VT1 is the base b, and the third end of the first triode VT1 is the collector c. In this embodiment, when the voltage difference between the base b and the emitter e of the first transistor VT1 is greater than the turn-on voltage, the first transistor VT1 is turned on.
Further, in an embodiment of the present invention, the second transistor VT2 is an NPN transistor, the first end of the second transistor VT2 is a collector c, the second end of the second transistor VT2 is a base b, and the third end of the second transistor VT2 is an emitter e.
Further, in an embodiment of the present invention, the second fet Q2 is an NMOS, the first terminal of the second fet Q2 is a drain d, the second terminal of the second fet Q2 is a source s, and the third terminal of the second fet Q2 is a gate g. In the present embodiment, when the gate g of the second fet Q2 is at a high level, the second fet Q2 is turned on.
In normal operation, when the detection control circuit is not connected to the charger, the controller 50 is in a non-operating state because the charging cathode CH-is connected to the ground terminal of the controller 50, and therefore the controller 50 cannot output a control signal to the sixth resistor R6 of the second control unit 42, the base b of the second transistor VT2 in the second control unit 42 is at a low level, and therefore the second transistor VT2 is in a non-conducting state, the collector c of the second transistor VT2 is at a high level, so that the third resistor R3 and the fourth resistor R4 in the first control unit 41 cannot be grounded normally, and therefore the base b of the first transistor VT1 in the first control unit 41 is also at a high level, so that the first transistor VT1 is in a non-conducting state, and the collector c of the first transistor VT1 is at a low level, and therefore the voltage input to the gate g of the first fet Q1 is at a low level, the first fet Q1 is turned off, and the energy storage module 20 is turned off between the discharging cathode P and the charging cathode CH.
When the detection control circuit is connected to the charger, the electric energy provided by the charger starts to supply power for the controller 50 and the control module 40 to work normally, the controller 50 outputs a high level to the sixth resistor R6 of the second control unit 42 after working, at this time, the base b of the second transistor VT2 in the second control unit 42 is at a high level, so that the second transistor VT2 is in a conducting state, at this time, the collector c of the second transistor VT2 is at a low level, so that the third resistor R3 and the fourth resistor R4 in the first control unit 41 are normally grounded and divide the voltage, so that the voltage difference between the base b of the first transistor VT1 and the emitter e thereof in the first control unit 41 is greater than the conducting voltage, so that the first transistor VT1 is in a conducting state, the collector c of the first transistor VT1 is at a high level, so that the voltage input to the gate g of the first field effect transistor Q1 is at a high level, the first fet Q1 is turned on, and the discharging cathode P-and the charging cathode CH-of the energy storage module 20 are connected, so that the charger starts to charge the energy storage module 20.
Further, the protection module 90 is configured to collect charging current and voltage and discharging current and voltage when the energy storage module 20 is charged and discharged, and implement protection of the energy storage module 20 against overcharge, overdischarge, overcurrent, and the like, where a sampling resistor Rs in the protection module 90 is configured to collect current of the energy storage module 20 during charging and discharging, and when a protection chip U1 in the protection module 90 obtains that current of the energy storage module 20 during charging and discharging is greater than a preset current, the protection chip controls a corresponding control terminal to perform output control. For example, when the energy storage module 20 discharges, when the protection chip U1 obtains that the discharge current is greater than the preset current, the protection chip U1 controls the discharge control terminal DSG to output a low level, so that the discharge MOS transistor Q3 is turned off, and at this time, the negative electrode B-of the battery pack and the discharge negative electrode P-of the energy storage module 20 are turned off, so that the current output of the energy storage module 20 is stopped, and overcurrent protection is implemented. The protection module 90 is specifically configured as an existing conventional device, and is not limited herein.
It should be noted that, after the first fet Q1 is turned on, even if the charger is removed, a voltage still exists between the positive electrode P + and the charging negative electrode CH-of the energy storage module 20, so that the first fet Q1 continues to be turned on continuously, and the first fet Q1 maintains self-locking in the on state, so that, in order to achieve that after the charger is removed, the first fet Q1 is turned off, the controller 50 controls to stop the on signal every preset time interval, for example, the controller 50 controls to output the off signal for 0.5 second after outputting the on signal for 10 seconds, so that the charger is turned on for a short time interval.
When the charger is not unplugged, the controller 50 can continuously work because the charger continuously supplies power to the controller 50, at this time, when the controller 50 does not output a control signal to cut off the first fet Q1, the charging current can pass through the body diode of the first fet Q1, so that the charging is continuously realized, and at this time, because the time of the disconnection controlled by the controller 50 is short, the loss and the heat caused by the body diode of the first fet Q1 can be ignored, so that the charger can keep charging the energy storage module 20 uninterruptedly.
When the charger is unplugged, the controller 50 is in a power-off and work-stopping state because the controller 50 does not receive power supply of the charger, so that the voltage output to the sixth resistor R6 by the controller 50 is at a low level, the base b of the second transistor VT2 is at a low level, and thus, as described above, the first field-effect transistor Q1 is finally in a cut-off state, so that the first field-effect transistor Q1 disconnects the discharging cathode P-and the charging cathode CH-of the energy storage module 20.
Meanwhile, before the charger is removed, the heating control module 80 performs heating operation; after the charger is unplugged, since the controller 50 is in an inactive state, it cannot output a control signal to the second fet Q2, so that the heating control module 80 stops operating. Meanwhile, as the controller 50 is in the power-off and work-stopping state, no power consumption exists in the controller 50, the control module 40, the temperature acquisition module 70 and the heating control module 80, and thus the current consumption of the energy storage module 20 can be effectively reduced.
Example four
The fourth embodiment of the present invention further provides a battery pack, including the first to the third embodiments of the detection control circuit.
Specifically, the battery pack is connected with the charger through the detection control circuit provided in the first to third embodiments, so that the controller starts to work and outputs a control signal to the control module, so that the control module controls the on-off module to be conducted, and the discharging cathode and the charging cathode of the energy storage module are conducted; when the battery pack is not connected with the charger, the controller does not work, so that the on-off module is stopped, the discharging cathode of the energy storage module is isolated from the charging cathode, the on-off module is only controlled by the control module, and the problems that the power consumption is large, the heating is serious and the charging efficiency is reduced due to the fact that the voltage drop of the existing diode is large do not exist in the on-off module.
EXAMPLE five
The fifth embodiment of the present invention further provides an electric tool, including the battery pack of the fourth embodiment.
Specifically, the electric tool comprises a device with a battery pack, and the detection control circuit provided by the first embodiment to the third embodiment enables the controller to start working and output a control signal to the control module when the electric tool is connected with the charger, so that the control module controls the on-off module to be conducted, and the discharging negative electrode and the charging negative electrode of the energy storage module are conducted; when the electric tool is not connected with the charger, the controller does not work, so that the on-off module is stopped, the discharging cathode of the energy storage module is isolated from the charging cathode, the on-off module is only controlled by the control module, and the problems that the power consumption is large, the heating is serious and the charging efficiency is reduced due to the fact that the voltage drop of the existing diode is large do not exist in the on-off module.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A detection control circuit, the circuit comprising:
the device comprises an energy storage module, an on-off module, a control module and a controller;
the on-off module is respectively connected with the control module and the discharging cathode and the charging cathode of the energy storage module and is used for correspondingly controlling the on-off state between the discharging cathode and the charging cathode according to the switching signal output by the control module;
the control module is respectively connected with the anode of the energy storage module, the charging cathode, the on-off module and the controller and is used for correspondingly controlling the on-off state of the on-off module according to a control signal output by the controller;
the controller is respectively connected with the charging negative electrode of the energy storage module and the control module and used for outputting a control signal to the control module when the controller is externally connected with the energy storage module for controlling the on-off module to be conducted, and the grounding end of the controller is connected with the charging negative electrode of the energy storage module.
2. The detection control circuit of claim 1, wherein the circuit further comprises a voltage regulation module;
the voltage stabilizing module is respectively connected with the anode of the energy storage module, the charging cathode of the energy storage module and the power supply end of the controller, and is used for stabilizing the input voltage to the voltage required by the operation of the controller and outputting the voltage to the controller.
3. The detection control circuit of claim 1, wherein the circuit further comprises a temperature acquisition module and a heating control module;
the temperature acquisition module is respectively connected with the controller and the charging negative electrode of the energy storage module, and is used for acquiring the temperature of the current environment and outputting the acquired data to the controller;
the heating control module is respectively connected with the anode of the energy storage module, the charging cathode and the controller and is used for controlling the heating state according to the control signal output by the controller.
4. The detection control circuit of claim 1, wherein the control module comprises a first control unit and a second control unit;
the first control unit is respectively connected with the anode of the energy storage module, the on-off module and the second control unit and is used for correspondingly controlling the on-off state of the on-off module according to the control signal output by the second control unit;
the second control unit is respectively connected with the first control unit, the controller and the charging negative electrode of the energy storage module and is used for correspondingly controlling the working state of the first control unit according to the control signal output by the controller.
5. The detection control circuit of claim 1, wherein the on-off module comprises a first field effect transistor, a first resistor, and a second resistor;
the first end of the first field effect transistor is connected with the discharging negative electrode of the energy storage module and one end of the first resistor respectively, the second end of the first field effect transistor is connected with the charging negative electrode of the energy storage module, the third end of the first field effect transistor is connected with the other end of the first resistor and one end of the second resistor, and the other end of the second resistor is connected with the control module.
6. The detection control circuit of claim 4, wherein the first control unit comprises a first transistor, a third resistor, and a fourth resistor;
the first end of the first triode is connected with the anode of the energy storage module and one end of the third resistor, the second end of the first triode is connected with the other end of the third resistor and one end of the fourth resistor, the third end of the first triode is connected with the on-off module, and the other end of the fourth resistor is connected with the second control unit.
7. The detection control circuit of claim 4, wherein the second control unit comprises a second transistor, a fifth resistor, and a sixth resistor;
the first end of the second triode is connected with the first control unit, the second end of the second triode is respectively connected with one end of a fifth resistor and one end of a sixth resistor, the third end of the second triode is connected with the charging negative electrode of the energy storage module and the other end of the fifth resistor, and the other end of the sixth resistor is connected with the controller.
8. The detection control circuit according to claim 2, wherein the voltage stabilizing module is a voltage stabilizer, an input terminal of the voltage stabilizer is connected to the positive electrode of the energy storage module, an output terminal of the voltage stabilizer is connected to the power supply terminal of the controller, and a ground terminal of the voltage stabilizer is connected to the charging negative electrode of the energy storage module.
9. The detection control circuit according to claim 3, wherein the temperature acquisition module comprises a seventh resistor and a thermistor, one end of the seventh resistor is connected with a power supply end of the controller, the other end of the seventh resistor and one end of the thermistor are connected with the controller, and the other end of the thermistor is connected with a ground end of the controller;
the heating control module comprises a second field effect transistor and a heater, the first end of the second field effect transistor is connected with one end of the heater, the other end of the heater is connected with the anode of the energy storage module, the second end of the second field effect transistor is connected with the charging cathode of the energy storage module, and the third end of the second field effect transistor is connected with the controller.
10. A battery pack, characterized in that it comprises a detection control circuit according to claims 1-9.
11. A power tool, characterized in that the power tool comprises the battery pack according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006502.6U CN210957837U (en) | 2019-11-19 | 2019-11-19 | Detection control circuit, battery pack and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006502.6U CN210957837U (en) | 2019-11-19 | 2019-11-19 | Detection control circuit, battery pack and electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210957837U true CN210957837U (en) | 2020-07-07 |
Family
ID=71376496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922006502.6U Active CN210957837U (en) | 2019-11-19 | 2019-11-19 | Detection control circuit, battery pack and electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210957837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917156A (en) * | 2020-07-23 | 2020-11-10 | 浙江高泰昊能科技有限公司 | Circuit with battery ignition prevention and intelligent charging functions and working method thereof |
-
2019
- 2019-11-19 CN CN201922006502.6U patent/CN210957837U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917156A (en) * | 2020-07-23 | 2020-11-10 | 浙江高泰昊能科技有限公司 | Circuit with battery ignition prevention and intelligent charging functions and working method thereof |
| CN111917156B (en) * | 2020-07-23 | 2022-01-18 | 浙江高泰昊能科技有限公司 | Circuit with battery ignition prevention and intelligent charging functions and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104600676A (en) | Battery protection circuit, electric energy supply device and electronic device | |
| MX2011002544A (en) | Battery charger. | |
| WO2023016574A1 (en) | Switching circuit, battery management system, battery pack, electrical device and control method | |
| CN208257490U (en) | A kind of photovoltaic energy storage device | |
| CN210957837U (en) | Detection control circuit, battery pack and electric tool | |
| CN113258640B (en) | Overcurrent protection circuit of battery and power supply equipment | |
| CN202550600U (en) | Charging activation apparatus of mobile terminal battery | |
| CN208094170U (en) | A kind of battery protecting circuit and dust catcher | |
| CN111933486A (en) | Relay surge current protection circuit and charging circuit | |
| CN110034595B (en) | Backup power supply management device and vehicle-mounted equipment | |
| CN215498732U (en) | Switch module, battery management system, battery pack and electric device | |
| CN109049020B (en) | Control circuit of electric shaver | |
| CN204464971U (en) | Battery protecting circuit, electric energy generator and electronic installation | |
| CN210898576U (en) | Battery charging and discharging protection circuit and battery device | |
| CN115580137A (en) | Switch module, battery management system, battery pack and electric device | |
| CN109673240B (en) | Intelligent mower | |
| CN216016467U (en) | Low-voltage protection circuit, device and electrical equipment | |
| CN217334191U (en) | Intelligent lithium battery pack and electric tool | |
| CN219225026U (en) | Voltage detection circuit, battery management system, battery pack and power utilization device | |
| CN216959371U (en) | Charging activation circuit and power supply system | |
| CN215580472U (en) | Power supply circuit with internal and external battery switching function, power supply module and electric vehicle | |
| CN210433405U (en) | Machine working circuit and dust collector comprising same | |
| CN218958568U (en) | Backup power supply with bidirectional quick charging function | |
| CN218386850U (en) | Battery system control circuit and inflator pump management system | |
| CN217445057U (en) | Lithium battery protection plate's isolating device and lithium battery unit that charges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |