CN211405533U - Heavy current discharge circuit of battery power supply equipment - Google Patents
Heavy current discharge circuit of battery power supply equipment Download PDFInfo
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- CN211405533U CN211405533U CN201922466496.2U CN201922466496U CN211405533U CN 211405533 U CN211405533 U CN 211405533U CN 201922466496 U CN201922466496 U CN 201922466496U CN 211405533 U CN211405533 U CN 211405533U
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Abstract
The utility model discloses a battery power supply unit's heavy current discharge circuit has effectively alleviated battery capacity pressure, makes the battery can realize the heavy current function of discharging under the low temperature condition. The device comprises a discharge control switch 6N1, an anti-capacitance reverse charging switch 6N2, a discharge control switch 6N3, a charge control switch 6N4 and an energy storage capacitor; the output end of the control circuit is respectively connected with the grid of the N-type transistor of each control switch; the source (pin 2) of the N-type transistor of the discharge control switch 6N1 is connected with a power supply, and the drain of the P-type transistor is connected with a heavy current load; the source electrode of a P-type transistor of the charging control switch 6N4 is connected with a power supply, and the drain electrode is connected with an energy storage capacitor; the drain electrode of a P-type transistor of the anti-capacitor reverse charging switch 6N2 is connected with the energy storage capacitor, and the source electrode of the P-type transistor is connected with the source electrode of the discharging control switch 6N 3; the drain of the P-type transistor of the discharge control switch 6N3 is connected to the large-current load, and the drain of the P-type transistor of the discharge control switch 6N1 is also connected.
Description
Technical Field
The utility model relates to an electron and communication technology field especially relate to a battery power supply unit's heavy current discharge circuit.
Background
With the continuous development of communication equipment, handheld equipment is applied more and more, and the functions of handheld equipment are also stronger and stronger, and the application with high current consumption in various applications puts forward more and more rigorous requirements on the power supply of the handheld equipment.
Generally, the handheld device is powered by a battery, which is limited by the battery capacity and the volume requirement, and the battery is usually designed according to the maximum capacity of the same volume, which often limits the large-current discharge capacity of the battery. Most of secondary batteries that present hand-held equipment adopted are lithium ion batteries, the primary battery who adopts contains lithium subcell, lithium carbon fluoride battery, lithium manganese battery, lithium sulfur dioxide battery etc. the heavy current discharge capacity of this type of battery is relevant with the capacity of battery, then 0.1C discharges for a short time, then 2C discharges for a long time, can satisfy heavy current discharge's demand basically under the normal atmospheric temperature state, nevertheless because of the battery capacity descends under the low temperature condition, the ability of heavy current discharge is not enough to lead to hand-held equipment's operating temperature scope to be restricted.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide a battery power supply unit's heavy current discharge circuit can effectively alleviate battery capacity pressure, makes the battery can realize the heavy current function of discharging under the low temperature condition, expands handheld device's operating temperature, prolongs handheld device's operating time.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize.
A large-current discharge circuit of battery power supply equipment comprises a discharge control switch 6N1, a capacitance-preventing reverse-charging switch 6N2, a discharge control switch 6N3, a charging control switch 6N4 and an energy storage capacitor;
the discharge control switch 6N1 is connected with a control circuit, and the output end of the control circuit is connected with the gate of the N-type transistor of the discharge control switch 6N1 and is used for controlling the input voltage of the gate of the N-type transistor; the source electrode of the P-type transistor of the discharge control switch 6N1 is connected with a power supply, the grid electrode of the P-type transistor of the discharge control switch 6N1 is connected with the power supply through a resistor, the drain electrode of the N-type transistor of the discharge control switch 6N1 is connected with the grid electrode of the P-type transistor through a resistor, and the drain electrode of the P-type transistor of the discharge control switch 6N1 is connected with a high-current load;
the gate of an N-type transistor of the charging control switch 6N4 is connected with the output end of the control circuit, the source of a P-type transistor of the charging control switch 6N4 is connected with a power supply, the gate of a P-type transistor of the charging control switch 6N4 is connected with the power supply through a resistor, the drain of an N-type transistor of the charging control switch 6N4 is connected with the gate of the P-type transistor through a resistor, and the drain of a P-type transistor of the charging control switch 6N4 is connected with the energy storage capacitor;
the gate of an N-type transistor of the anti-capacitor reverse-charging switch 6N2 is connected to the output end of the control circuit, the drain of a P-type transistor of the anti-capacitor reverse-charging switch 6N2 is connected to the energy storage capacitor, the source (pin 2) of the P-type transistor of the anti-capacitor reverse-charging switch 6N2 is connected to the source of the P-type transistor of the discharge control switch 6N3, the gate of the P-type transistor of the anti-capacitor reverse-charging switch 6N2 is connected to the energy storage capacitor through a resistor, and the drain of the N-type transistor of the anti-capacitor reverse-charging switch 6N2 is connected to the gate of the P-type transistor through a;
the gate of the N-type transistor of the discharge control switch 6N3 is connected with the output end of the control circuit, the gate of the P-type transistor of the discharge control switch 6N3 is connected with the source of the P-type transistor of the anti-capacitance anti-reverse charging switch 6N2 through a resistor, and the drain of the P-type transistor of the discharge control switch 6N3 is connected with a high-current load; the drain of the P-type transistor of the discharge control switch 6N3 is also connected with the drain of the P-type transistor of the discharge control switch 6N 1.
The utility model discloses technical scheme's characteristics lie in with further improvement:
the discharging control switch 6N1, the anti-capacitance reverse charging switch 6N2, the discharging control switch 6N3 and the charging control switch 6N4 are MOS type field effect transistors IRF5851 respectively.
A plurality of resistors which are connected in parallel are connected in series between the 4 feet of the charging control switch 6N4 and the energy storage capacitor.
Compared with the prior art, the beneficial effects of the utility model are that:
the large-current discharge circuit of the battery power supply equipment effectively relieves the battery capacity pressure, so that the battery can realize the large-current discharge function under the low-temperature condition, and the capacity of the battery is larger than that of the large-current discharge battery during the small-current discharge; will the utility model discloses an among the heavy current discharge circuit was applied to handheld device, expanded handheld device's operating temperature, prolonged handheld device's operating time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a large current discharge circuit of a battery power supply apparatus according to the present invention;
fig. 2 is a schematic diagram of a MOS field effect transistor IRF 5851.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
To the problem among the prior art, analyze the heavy current application state of handheld device, it is big that the heavy current application state of discovery handheld device often uses and possesses operating current, and the time is shorter, according to this application characteristic, the utility model discloses an energy storage electric capacity carries out the energy storage, relies on energy storage electric capacity and battery to accomplish the heavy current jointly and discharges. The utility model provides a solution at first need confirm the discharge time and the discharge current of heavy current discharge, need confirm the electric current and the charge time that energy storage capacitor charges simultaneously, combine the control circuit of handheld device self, accomplish the heavy current and discharge and go on energy storage capacitor to charge before, energy storage capacitor and battery discharge jointly when the heavy current discharges.
The energy storage capacitor is charged and discharged according to different time lengths and different current sizes, and two paths are adopted for charging and discharging of the energy storage capacitor: the charging adopts a long-time low-current mode, and the discharging adopts a short-time high-current mode. The battery power supply and the energy storage capacitor discharge two paths for power supply, the battery power supply is adopted for conventional power supply, the energy storage capacitor is added for discharging on the basis of the battery power supply when heavy current is discharged, the battery power supply and the energy storage discharge paths are in short circuit at the port of the heavy current discharge unit and need to be isolated, the voting circuit adopting two diodes can complete the function, the consumption of the diodes is too large and cannot be applied, therefore, an anti-reverse charge switch is added behind the energy storage capacitor, and the energy storage capacitor cannot be charged when the battery is independently supplied with power.
Specifically, referring to fig. 1, the present invention provides a large current discharge circuit of a battery power supply device, which includes a discharge control switch 6N1, a capacitance-preventing reverse-charging switch 6N2, a discharge control switch 6N3, a charge control switch 6N4 and an energy storage capacitor;
the discharge control switch 6N1 is connected to a control circuit, and the output end of the control circuit is connected to the N-type transistor gate (pin 1) of the discharge control switch 6N1, and is used for controlling the input voltage of the N-type transistor gate; the source (pin 2) of the P-type transistor of the discharge control switch 6N1 is connected with a power supply, the gate (pin 3) of the P-type transistor of the discharge control switch 6N1 is connected with the power supply through a resistor, the drain (pin 6) of the N-type transistor of the discharge control switch 6N1 is connected with the gate (pin 3) of the P-type transistor through a resistor, and the drain (pin 4) of the P-type transistor of the discharge control switch 6N1 is connected with a high-current load;
the N-type transistor gate (pin 1) of the charging control switch 6N4 is connected with the output end of the control circuit, the P-type transistor source (pin 2) of the charging control switch 6N4 is connected with a power supply, the P-type transistor gate (pin 3) of the charging control switch 6N4 is connected with the power supply through a resistor, the N-type transistor drain (pin 6) of the charging control switch 6N4 is connected with the P-type transistor gate (pin 3) through a resistor, and the P-type transistor drain (pin 4) of the charging control switch 6N4 is connected with the energy storage capacitor;
an N-type transistor gate (pin 1) of the anti-capacitance anti-charging switch 6N2 is connected with an output end of the control circuit, a P-type transistor drain (pin 4) of the anti-capacitance anti-charging switch 6N2 is connected with the energy storage capacitor, a P-type transistor source (pin 2) of the anti-capacitance anti-charging switch 6N2 is connected with a P-type transistor source (pin 2) of the discharge control switch 6N3, a P-type transistor gate (pin 3) of the anti-capacitance anti-charging switch 6N2 is connected with the energy storage capacitor through a resistor, and an N-type transistor drain (pin 6) of the anti-capacitance anti-charging switch 6N2 is connected with the P-type transistor gate (pin 3) through a resistor;
the N-type transistor grid (pin 1) of the discharge control switch 6N3 is connected with the output end of the control circuit, the P-type transistor grid (pin 3) of the discharge control switch 6N3 is connected with the P-type transistor source (pin 2) of the anti-capacitance anti-charging switch 6N2 through a resistor, the N-type transistor drain (pin 6) of the anti-capacitance anti-charging switch 6N2 is connected with the P-type transistor grid (pin 3) through a resistor, and the P-type transistor drain (pin 4) of the discharge control switch 6N3 is connected with a high-current load.
The discharging control switch 6N1, the anti-capacitance reverse charging switch 6N2, the discharging control switch 6N3 and the charging control switch 6N4 respectively adopt MOS type field effect transistors IRF 5851.
Referring to fig. 2, an MOS field effect transistor IRF5851 is a circuit constructed by using the principle that a gate of an MOS transistor controls the on/off of a source and a drain of the MOS transistor, and includes two transistors, i.e., an N-channel transistor and a P-channel transistor, wherein the source of the N-channel transistor is grounded (pin 5), the gate (pin 1) is turned on when the voltage is greater than a certain value, and the drain (pin 6) is connected to a power supply; the source (pin 2) of the P-channel transistor is connected with a power supply, and the voltage of the grid (pin 3) is lower than the source (pin 2) by a certain voltage and then the P-channel transistor is conducted; referring to fig. 2, when the input port is connected to a voltage, to ensure the conduction of the P-channel transistor, the voltage is applied to the pin 1 to a certain value to turn on the N-channel transistor, and the pin 3 is grounded to satisfy the conduction condition of the P-channel transistor, so that the whole circuit is turned on. On the contrary, when the pin 1 input voltage does not satisfy the N-channel transistor turn-on condition, the pin 3 is connected to R3 and the input restores the initial condition, and the whole circuit is turned off.
The input and output ports of the MOS type field effect transistor IRF5851 control switch shown in FIG. 2 are connected in series between a power supply and a load, the output is influenced through the control port of the MOS type field effect transistor IRF5851 to achieve the function of controlling the on-off of the power supply, the grounding port of the MOS type field effect transistor IRF5851 control switch is connected with the power ground inside the adapter box to achieve the purpose of simplifying the circuit, and the impedance of a power line used in the manufacture of the switch part is reduced as much as possible at the input and output parts so as to reduce the voltage difference and improve the stability and the sensitivity of the switch part.
In the high-current discharge circuit, on-off selection of each switch is completed through control of the control circuit, and the switch has the advantages of small on-resistance, high switching speed and the like.
The 6N2 adopts the switch as a capacitance-preventing reverse-charging switch, when a power supply supplies power, namely a battery supplies power, the voltage reaches a pin 2 through a pin 4 of the 6N3, and the voltage is reduced by 0.2V, so that the voltage of a pin 2 of the capacitance-preventing reverse-charging switch 6N2 is reduced by 0.2V from the power supply voltage; because the anti-reverse charge switch is at a low level, the voltage cannot reach the 4 feet of the anti-capacitance anti-reverse charge switch 6N 2; if the anti-reverse charging switch is at a high level, the voltage reaches the 4 pins of the anti-capacitance anti-reverse charging switch 6N2, namely the battery charges the energy storage capacitor; because the resistance of the path is small and the capacitance value of the energy storage capacitor is large, the charging current is large, and the problems are prevented by a control circuit.
When the handheld device is normally applied, the discharge control switch 6N1 is set high, the anti-capacitor reverse charging switch 6N2 is set low, at the moment, the large current is loaded with electricity, meanwhile, the battery can be prevented from charging the energy storage capacitor, and the device works in a small current mode; when large current is needed to discharge, the control end raises the charging control switch 6N4 in advance to charge the energy storage capacitor in advance, the discharging control switch 6N1 is raised during large current discharge, the capacitor anti-charging switch 6N2 is raised, and at the moment, the battery and the energy storage capacitor are discharged simultaneously.
The utility model provides a battery power supply equipment's heavy current discharge circuit can use in handheld device's heavy current discharge demand, can effectively alleviate battery capacity pressure, and the battery that can effectual adaptation low temperature environmental condition is used, and the capacity of battery is bigger than the battery capacity that the heavy current discharged when the undercurrent discharges simultaneously, consequently the utility model provides a battery power supply equipment's heavy current discharge circuit can effectively use battery capacity in practical application, extension handheld device operating time.
What point to put forward, the utility model provides a battery power supply unit's heavy current discharge circuit in operation process, need notice the calculation of carrying out energy storage capacitance capacity, according to discharge preparation time, discharge time isoparametric calculation electric capacity charge-discharge time, the reasonable current-limiting resistance that charges that sets up ensures that each resistance electric capacity etc. is in derating the application state, ensures that electric capacity polarity is correct.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A large-current discharge circuit of battery power supply equipment is characterized by comprising a discharge control switch 6N1, a capacitance-resistant reverse charging switch 6N2, a discharge control switch 6N3, a charging control switch 6N4 and an energy storage capacitor;
the discharge control switch 6N1 is connected with a control circuit, and the output end of the control circuit is connected with the gate of the N-type transistor of the discharge control switch 6N1 and is used for controlling the input voltage of the gate of the N-type transistor; the source electrode of the P-type transistor of the discharge control switch 6N1 is connected with a power supply, the grid electrode of the P-type transistor of the discharge control switch 6N1 is connected with the power supply through a resistor, the drain electrode of the N-type transistor of the discharge control switch 6N1 is connected with the grid electrode of the P-type transistor through a resistor, and the drain electrode of the P-type transistor of the discharge control switch 6N1 is connected with a high-current load;
the gate of an N-type transistor of the charging control switch 6N4 is connected with the output end of the control circuit, the source of a P-type transistor of the charging control switch 6N4 is connected with a power supply, the gate of a P-type transistor of the charging control switch 6N4 is connected with the power supply through a resistor, the drain of an N-type transistor of the charging control switch 6N4 is connected with the gate of the P-type transistor through a resistor, and the drain of a P-type transistor of the charging control switch 6N4 is connected with the energy storage capacitor;
the gate of an N-type transistor of the anti-capacitor reverse charging switch 6N2 is connected to the output end of the control circuit, the drain of a P-type transistor of the anti-capacitor reverse charging switch 6N2 is connected to the energy storage capacitor, the source of a P-type transistor of the anti-capacitor reverse charging switch 6N2 is connected to the source of a P-type transistor of the discharge control switch 6N3, the gate of a P-type transistor of the anti-capacitor reverse charging switch 6N2 is connected to the energy storage capacitor through a resistor, and the drain of an N-type transistor of the anti-capacitor reverse charging switch 6N2 is connected to the gate of a P-type transistor through a resistor;
the gate of the N-type transistor of the discharge control switch 6N3 is connected with the output end of the control circuit, the gate of the P-type transistor of the discharge control switch 6N3 is connected with the source of the P-type transistor of the anti-capacitance anti-back-charging switch 6N2 through a resistor, and the drain of the P-type transistor of the discharge control switch 6N3 is connected with a high-current load; the drain of the P-type transistor of the discharge control switch 6N3 is also connected with the drain of the P-type transistor of the discharge control switch 6N 1.
2. The large-current discharge circuit of battery power supply equipment according to claim 1, wherein said discharge control switch 6N1, anti-capacitive back-charging switch 6N2, discharge control switch 6N3 and charge control switch 6N4 are MOS type field effect transistors IRF5851, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922466496.2U CN211405533U (en) | 2019-12-31 | 2019-12-31 | Heavy current discharge circuit of battery power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922466496.2U CN211405533U (en) | 2019-12-31 | 2019-12-31 | Heavy current discharge circuit of battery power supply equipment |
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| Publication Number | Publication Date |
|---|---|
| CN211405533U true CN211405533U (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922466496.2U Active CN211405533U (en) | 2019-12-31 | 2019-12-31 | Heavy current discharge circuit of battery power supply equipment |
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| CN (1) | CN211405533U (en) |
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- 2019-12-31 CN CN201922466496.2U patent/CN211405533U/en active Active
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